Bump to Buildah 1.16.0-dev in upstream

Bump Buildah to v1.16.0-dev in the upstream branch
of Podman.  This will allow us to get a number of new
issues into the upstream branch for use.  The version of
Buildah will need to be bumped to v1.16.0 and then
vendored into Podman before we release Podman v2.0

Signed-off-by: TomSweeneyRedHat <tsweeney@redhat.com>

42 files changed, 2175 insertions, 1303 deletions

diff --git a/go.mod b/go.mod
index 8f5a53c80..5c5808998 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd // indirect
 	github.com/containernetworking/cni v0.7.2-0.20200304161608-4fae32b84921
 	github.com/containernetworking/plugins v0.8.6
-	github.com/containers/buildah v1.15.1-0.20200708111410-d2ea9429455d
+	github.com/containers/buildah v1.15.1-0.20200731151214-29f4d01c621c
 	github.com/containers/common v0.18.0
 	github.com/containers/conmon v2.0.19+incompatible
 	github.com/containers/image/v5 v5.5.1
@@ -62,7 +62,6 @@ require (
 	golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7
 	golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a
 	golang.org/x/sys v0.0.0-20200519105757-fe76b779f299
-	golang.org/x/text v0.3.3 // indirect
 	gopkg.in/yaml.v2 v2.3.0
 	k8s.io/api v0.18.6
 	k8s.io/apimachinery v0.18.6
diff --git a/go.sum b/go.sum
index 01b655388..4ea2880de 100644
--- a/go.sum
+++ b/go.sum
@@ -70,8 +70,8 @@ github.com/containernetworking/cni v0.7.2-0.20200304161608-4fae32b84921 h1:eUMd8
 github.com/containernetworking/cni v0.7.2-0.20200304161608-4fae32b84921/go.mod h1:LGwApLUm2FpoOfxTDEeq8T9ipbpZ61X79hmU3w8FmsY=
 github.com/containernetworking/plugins v0.8.6 h1:npZTLiMa4CRn6m5P9+1Dz4O1j0UeFbm8VYN6dlsw568=
 github.com/containernetworking/plugins v0.8.6/go.mod h1:qnw5mN19D8fIwkqW7oHHYDHVlzhJpcY6TQxn/fUyDDM=
-github.com/containers/buildah v1.15.1-0.20200708111410-d2ea9429455d h1:HgJJn1UBFjM464NpEmgLwVje5vSF/fBYAdLLoww9HgU=
-github.com/containers/buildah v1.15.1-0.20200708111410-d2ea9429455d/go.mod h1:HUAiD1mCGPFPcIuk5zls1LElLhXo7Q3hWDwheojjyAs=
+github.com/containers/buildah v1.15.1-0.20200731151214-29f4d01c621c h1:+V9RQOhg1LyhyHHU33OVjO+Uan1MoVbkjufH8E/BeLU=
+github.com/containers/buildah v1.15.1-0.20200731151214-29f4d01c621c/go.mod h1:XVOKQHd1sP/7tFpCXIaNsUJZdTNCwVZ7YZiLnnEfrVg=
 github.com/containers/common v0.15.2/go.mod h1:rhpXuGLTEKsk/xX/x0iKGHjRadMHpBd2ZiNDugwXPEM=
 github.com/containers/common v0.18.0 h1:pZB6f17N5QV43TcT06gtx1lb0rxd/4StFdVhP9CtgQg=
 github.com/containers/common v0.18.0/go.mod h1:H2Wqvx6wkqdzT4RcTCqIG4W0HSOZwUbbNiUTX1+VohU=
@@ -83,6 +83,8 @@ github.com/containers/libtrust v0.0.0-20190913040956-14b96171aa3b h1:Q8ePgVfHDpl
 github.com/containers/libtrust v0.0.0-20190913040956-14b96171aa3b/go.mod h1:9rfv8iPl1ZP7aqh9YA68wnZv2NUDbXdcdPHVz0pFbPY=
 github.com/containers/ocicrypt v1.0.2 h1:Q0/IPs8ohfbXNxEfyJ2pFVmvJu5BhqJUAmc6ES9NKbo=
 github.com/containers/ocicrypt v1.0.2/go.mod h1:nsOhbP19flrX6rE7ieGFvBlr7modwmNjsqWarIUce4M=
+github.com/containers/ocicrypt v1.0.3 h1:vYgl+RZ9Q3DPMuTfxmN+qp0X2Bj52uuY2vnt6GzVe1c=
+github.com/containers/ocicrypt v1.0.3/go.mod h1:CUBa+8MRNL/VkpxYIpaMtgn1WgXGyvPQj8jcy0EVG6g=
 github.com/containers/psgo v1.5.1 h1:MQNb7FLbXqBdqz6u4lI2QWizVz4RSTzs1+Nk9XT1iVA=
 github.com/containers/psgo v1.5.1/go.mod h1:2ubh0SsreMZjSXW1Hif58JrEcFudQyIy9EzPUWfawVU=
 github.com/containers/storage v1.20.2/go.mod h1:oOB9Ie8OVPojvoaKWEGSEtHbXUAs+tSyr7RO7ZGteMc=
@@ -479,6 +481,8 @@ go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.4/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
 go.etcd.io/bbolt v1.3.5 h1:XAzx9gjCb0Rxj7EoqcClPD1d5ZBxZJk0jbuoPHenBt0=
 go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
+go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1 h1:A/5uWzF44DlIgdm/PQFwfMkW0JX+cIcQi/SwLAmZP5M=
+go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1/go.mod h1:SNgMg+EgDFwmvSmLRTNKC5fegJjB7v23qTQ0XLGUNHk=
 go.opencensus.io v0.22.0 h1:C9hSCOW830chIVkdja34wa6Ky+IzWllkUinR+BtRZd4=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.uber.org/atomic v1.4.0 h1:cxzIVoETapQEqDhQu3QfnvXAV4AlzcvUCxkVUFw3+EU=
diff --git a/vendor/github.com/containers/buildah/.cirrus.yml b/vendor/github.com/containers/buildah/.cirrus.yml
index 3b4f6e9de..a47a48453 100644
--- a/vendor/github.com/containers/buildah/.cirrus.yml
+++ b/vendor/github.com/containers/buildah/.cirrus.yml
@@ -27,7 +27,7 @@ env:
     ####
     # GCE project where images live
     IMAGE_PROJECT: "libpod-218412"
-    # See https://github.com/containers/libpod/blob/master/contrib/cirrus/README.md#test_build_cache_images_task-task
+    # See https://github.com/containers/podman/blob/master/contrib/cirrus/README.md#test_build_cache_images_task-task
     FEDORA_NAME: "fedora-32"
     PRIOR_FEDORA_NAME: "fedora-31"
     UBUNTU_NAME: "ubuntu-20"
@@ -111,17 +111,32 @@ gce_instance:
     # not supported by bors-ng
     # allow_failures: $CI == $CI
 
-    timeout_in: 30m
+    timeout_in: 45m
 
     setup_script: '${SCRIPT_BASE}/setup.sh |& ${_TIMESTAMP}'
     build_script: '${SCRIPT_BASE}/build.sh |& ${_TIMESTAMP}'
-    # FIXME: These tests mostly/always fail
-    unit_test_script: '${SCRIPT_BASE}/test.sh unit |& ${_TIMESTAMP} || true'
+    unit_test_script: '${SCRIPT_BASE}/test.sh unit |& ${_TIMESTAMP}'
 
     binary_artifacts:
         path: ./bin/*
 
 
+'cirrus-ci/only_prs/conformance_task':
+    gce_instance:  # Only need to specify differences from defaults (above)
+        image_name: "${UBUNTU_CACHE_IMAGE_NAME}"
+
+    # see bors.toml
+    skip: $CIRRUS_BRANCH =~ ".*\.tmp"
+
+    # don't fail the PR when we fail until #2480 is merged
+    allow_failures: true
+
+    timeout_in: 20m
+
+    setup_script: '${SCRIPT_BASE}/setup.sh |& ${_TIMESTAMP}'
+    conformance_test_script: '${SCRIPT_BASE}/test.sh conformance |& ${_TIMESTAMP}'
+
+
 # This task runs `make vendor` followed by ./hack/tree_status.sh to check
 # whether the git tree is clean.  The reasoning for that is to make sure
 # that the vendor.conf, the code and the vendored packages in ./vendor are
@@ -253,3 +268,38 @@ gce_instance:
         memory: 1
 
     script: /bin/true
+
+# Build the static binary
+'cirrus-ci/only_prs/static_binary_task':
+    depends_on:
+        - "cirrus-ci/only_prs/gate"
+
+    gce_instance:
+        image_name: "${FEDORA_CACHE_IMAGE_NAME}"
+        cpu: 8
+        memory: 12
+        disk: 200
+
+    init_script: |
+        set -ex
+        setenforce 0
+        growpart /dev/sda 1 || true
+        resize2fs /dev/sda1 || true
+        yum -y install podman
+
+    nix_cache:
+      folder: '.cache'
+      fingerprint_script: |
+        echo "nix-v1-$(sha1sum nix/nixpkgs.json | head -c 40)"
+
+    build_script: |
+        set -ex
+        mkdir -p /nix
+        mkdir -p .cache
+        mount --bind .cache /nix
+        if [[ -z $(ls -A /nix) ]]; then podman run --rm --privileged -ti -v /:/mnt nixos/nix cp -rfT /nix /mnt/nix; fi
+        podman run --rm --privileged -ti -v /nix:/nix -v ${PWD}:${PWD} -w ${PWD} nixos/nix nix --print-build-logs --option cores 8 --option max-jobs 8 build --file nix/
+        chown -Rf $(whoami) .cache
+
+    binaries_artifacts:
+        path: "result/bin/buildah"
diff --git a/vendor/github.com/containers/buildah/.gitignore b/vendor/github.com/containers/buildah/.gitignore
index 947216443..d98205316 100644
--- a/vendor/github.com/containers/buildah/.gitignore
+++ b/vendor/github.com/containers/buildah/.gitignore
@@ -6,5 +6,6 @@ docs/buildah*.1
 tests/tools/build
 Dockerfile*
 !/tests/bud/*/Dockerfile*
+!/tests/conformance/**/Dockerfile*
 *.swp
 result
diff --git a/vendor/github.com/containers/buildah/Makefile b/vendor/github.com/containers/buildah/Makefile
index 892c25810..5b0e00850 100644
--- a/vendor/github.com/containers/buildah/Makefile
+++ b/vendor/github.com/containers/buildah/Makefile
@@ -35,16 +35,25 @@ LIBSECCOMP_COMMIT := release-2.3
 
 EXTRA_LDFLAGS ?=
 LDFLAGS := -ldflags '-X main.GitCommit=$(GIT_COMMIT) -X main.buildInfo=$(SOURCE_DATE_EPOCH) -X main.cniVersion=$(CNI_COMMIT) $(EXTRA_LDFLAGS)'
-SOURCES=*.go imagebuildah/*.go bind/*.go chroot/*.go cmd/buildah/*.go docker/*.go pkg/blobcache/*.go pkg/cli/*.go pkg/parse/*.go util/*.go
+SOURCES=*.go imagebuildah/*.go bind/*.go chroot/*.go cmd/buildah/*.go copier/*.go docker/*.go pkg/blobcache/*.go pkg/cli/*.go pkg/parse/*.go util/*.go
 
 LINTFLAGS ?=
 
 all: bin/buildah bin/imgtype docs
 
+# Update nix/nixpkgs.json its latest stable commit
+.PHONY: nixpkgs
 nixpkgs:
-	@nix run -f channel:nixpkgs-unstable nix-prefetch-git -c nix-prefetch-git \
+	@nix run -f channel:nixos-20.03 nix-prefetch-git -c nix-prefetch-git \
 		--no-deepClone https://github.com/nixos/nixpkgs > nix/nixpkgs.json
 
+# Build statically linked binary
+.PHONY: static
+static:
+	@nix build -f nix/
+	mkdir -p ./bin
+	cp -rfp ./result/bin/* ./bin/
+
 .PHONY: bin/buildah
 bin/buildah:  $(SOURCES)
 	$(GO_BUILD) $(LDFLAGS) -o $@ $(BUILDFLAGS) ./cmd/buildah
@@ -125,20 +134,24 @@ install.completions:
 install.runc:
 	install -m 755 ../../opencontainers/runc/runc $(DESTDIR)/$(BINDIR)/
 
+.PHONY: test-conformance
+test-conformance:
+	$(GO_TEST) -v -tags "$(STORAGETAGS) $(SECURITYTAGS)" -cover -timeout 15m ./tests/conformance
+
 .PHONY: test-integration
 test-integration: install.tools
 	./tests/tools/build/ginkgo $(BUILDFLAGS) -v tests/e2e/.
 	cd tests; ./test_runner.sh
 
 tests/testreport/testreport: tests/testreport/testreport.go
-	$(GO_BUILD) -ldflags "-linkmode external -extldflags -static" -tags "$(STORAGETAGS) $(SECURITYTAGS)" -o tests/testreport/testreport ./tests/testreport
+	$(GO_BUILD) -ldflags "-linkmode external -extldflags -static" -tags "$(STORAGETAGS) $(SECURITYTAGS)" -o tests/testreport/testreport ./tests/testreport/testreport.go
 
 .PHONY: test-unit
 test-unit: tests/testreport/testreport
-	$(GO_TEST) -v -tags "$(STORAGETAGS) $(SECURITYTAGS)" -race $(shell $(GO) list ./... | grep -v vendor | grep -v tests | grep -v cmd)
+	$(GO_TEST) -v -tags "$(STORAGETAGS) $(SECURITYTAGS)" -cover -race $(shell $(GO) list ./... | grep -v vendor | grep -v tests | grep -v cmd) -timeout 40m
 	tmp=$(shell mktemp -d) ; \
 	mkdir -p $$tmp/root $$tmp/runroot; \
-	$(GO_TEST) -v -tags "$(STORAGETAGS) $(SECURITYTAGS)" ./cmd/buildah -args -root $$tmp/root -runroot $$tmp/runroot -storage-driver vfs -signature-policy $(shell pwd)/tests/policy.json -registries-conf $(shell pwd)/tests/registries.conf
+	$(GO_TEST) -v -tags "$(STORAGETAGS) $(SECURITYTAGS)" -cover -race ./cmd/buildah -args --root $$tmp/root --runroot $$tmp/runroot --storage-driver vfs --signature-policy $(shell pwd)/tests/policy.json --registries-conf $(shell pwd)/tests/registries.conf
 
 vendor-in-container:
 	podman run --privileged --rm --env HOME=/root -v `pwd`:/src -w /src docker.io/library/golang:1.13 make vendor
diff --git a/vendor/github.com/containers/buildah/README.md b/vendor/github.com/containers/buildah/README.md
index 7589da51d..1605aaf73 100644
--- a/vendor/github.com/containers/buildah/README.md
+++ b/vendor/github.com/containers/buildah/README.md
@@ -41,7 +41,7 @@ Buildah and Podman are two complementary open-source projects that are
 available on most Linux platforms and both projects reside at
 [GitHub.com](https://github.com) with Buildah
 [here](https://github.com/containers/buildah) and Podman
-[here](https://github.com/containers/libpod).  Both, Buildah and Podman are
+[here](https://github.com/containers/podman).  Both, Buildah and Podman are
 command line tools that work on Open Container Initiative (OCI) images and
 containers.  The two projects differentiate in their specialization.
 
diff --git a/vendor/github.com/containers/buildah/chroot/run.go b/vendor/github.com/containers/buildah/chroot/run.go
index d65c36470..8616c4cac 100644
--- a/vendor/github.com/containers/buildah/chroot/run.go
+++ b/vendor/github.com/containers/buildah/chroot/run.go
@@ -7,6 +7,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -741,10 +742,13 @@ func runUsingChrootExecMain() {
 			os.Exit(1)
 		}
 	} else {
-		logrus.Debugf("clearing supplemental groups")
-		if err = syscall.Setgroups([]int{}); err != nil {
-			fmt.Fprintf(os.Stderr, "error clearing supplemental groups list: %v", err)
-			os.Exit(1)
+		setgroups, _ := ioutil.ReadFile("/proc/self/setgroups")
+		if strings.Trim(string(setgroups), "\n") != "deny" {
+			logrus.Debugf("clearing supplemental groups")
+			if err = syscall.Setgroups([]int{}); err != nil {
+				fmt.Fprintf(os.Stderr, "error clearing supplemental groups list: %v", err)
+				os.Exit(1)
+			}
 		}
 	}
 
@@ -1093,7 +1097,8 @@ func setupChrootBindMounts(spec *specs.Spec, bundlePath string) (undoBinds func(
 		}
 		subSys := filepath.Join(spec.Root.Path, m.Mountpoint)
 		if err := unix.Mount(m.Mountpoint, subSys, "bind", sysFlags, ""); err != nil {
-			return undoBinds, errors.Wrapf(err, "error bind mounting /sys from host into mount namespace")
+			logrus.Warningf("could not bind mount %q, skipping: %v", m.Mountpoint, err)
+			continue
 		}
 		if err := makeReadOnly(subSys, sysFlags); err != nil {
 			return undoBinds, err
@@ -1101,10 +1106,6 @@ func setupChrootBindMounts(spec *specs.Spec, bundlePath string) (undoBinds func(
 	}
 	logrus.Debugf("bind mounted %q to %q", "/sys", filepath.Join(spec.Root.Path, "/sys"))
 
-	// Add /sys/fs/selinux to the set of masked paths, to ensure that we don't have processes
-	// attempting to interact with labeling, when they aren't allowed to do so.
-	spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/selinux")
-
 	// Bind mount in everything we've been asked to mount.
 	for _, m := range spec.Mounts {
 		// Skip anything that we just mounted.
diff --git a/vendor/github.com/containers/buildah/digester.go b/vendor/github.com/containers/buildah/digester.go
index 498bdeeb5..ff1bef2f5 100644
--- a/vendor/github.com/containers/buildah/digester.go
+++ b/vendor/github.com/containers/buildah/digester.go
@@ -1,63 +1,255 @@
 package buildah
 
 import (
+	"archive/tar"
+	"fmt"
 	"hash"
-	"strings"
+	"io"
+	"sync"
 
 	digest "github.com/opencontainers/go-digest"
+	"github.com/pkg/errors"
 )
 
-type singleDigester struct {
-	digester digest.Digester
-	prefix   string
+type digester interface {
+	io.WriteCloser
+	ContentType() string
+	Digest() digest.Digest
+}
+
+// A simple digester just digests its content as-is.
+type simpleDigester struct {
+	digester    digest.Digester
+	hasher      hash.Hash
+	contentType string
+}
+
+func newSimpleDigester(contentType string) digester {
+	finalDigester := digest.Canonical.Digester()
+	return &simpleDigester{
+		digester:    finalDigester,
+		hasher:      finalDigester.Hash(),
+		contentType: contentType,
+	}
+}
+
+func (s *simpleDigester) ContentType() string {
+	return s.contentType
+}
+
+func (s *simpleDigester) Write(p []byte) (int, error) {
+	return s.hasher.Write(p)
+}
+
+func (s *simpleDigester) Close() error {
+	return nil
+}
+
+func (s *simpleDigester) Digest() digest.Digest {
+	return s.digester.Digest()
+}
+
+// A tarFilterer passes a tarball through to an io.WriteCloser, potentially
+// modifying headers as it goes.
+type tarFilterer struct {
+	wg         sync.WaitGroup
+	pipeWriter *io.PipeWriter
+	closedLock sync.Mutex
+	closed     bool
+	err        error
+}
+
+func (t *tarFilterer) Write(p []byte) (int, error) {
+	return t.pipeWriter.Write(p)
+}
+
+func (t *tarFilterer) Close() error {
+	t.closedLock.Lock()
+	if t.closed {
+		t.closedLock.Unlock()
+		return errors.Errorf("tar filter is already closed")
+	}
+	t.closed = true
+	t.closedLock.Unlock()
+	err := t.pipeWriter.Close()
+	t.wg.Wait()
+	if err != nil {
+		return errors.Wrapf(err, "error closing filter pipe")
+	}
+	return t.err
+}
+
+// newTarFilterer passes one or more tar archives through to an io.WriteCloser
+// as a single archive, potentially calling filter to modify headers and
+// contents as it goes.
+func newTarFilterer(writeCloser io.WriteCloser, filter func(hdr *tar.Header) (skip, replaceContents bool, replacementContents io.Reader)) io.WriteCloser {
+	pipeReader, pipeWriter := io.Pipe()
+	tarWriter := tar.NewWriter(writeCloser)
+	filterer := &tarFilterer{
+		pipeWriter: pipeWriter,
+	}
+	filterer.wg.Add(1)
+	go func() {
+		filterer.closedLock.Lock()
+		closed := filterer.closed
+		filterer.closedLock.Unlock()
+		for !closed {
+			tarReader := tar.NewReader(pipeReader)
+			hdr, err := tarReader.Next()
+			for err == nil {
+				var skip, replaceContents bool
+				var replacementContents io.Reader
+				if filter != nil {
+					skip, replaceContents, replacementContents = filter(hdr)
+				}
+				if !skip {
+					err = tarWriter.WriteHeader(hdr)
+					if err != nil {
+						err = errors.Wrapf(err, "error filtering tar header for %q", hdr.Name)
+						break
+					}
+					if hdr.Size != 0 {
+						var n int64
+						var copyErr error
+						if replaceContents {
+							n, copyErr = io.CopyN(tarWriter, replacementContents, hdr.Size)
+						} else {
+							n, copyErr = io.Copy(tarWriter, tarReader)
+						}
+						if copyErr != nil {
+							err = errors.Wrapf(copyErr, "error copying content for %q", hdr.Name)
+							break
+						}
+						if n != hdr.Size {
+							err = errors.Errorf("error filtering content for %q: expected %d bytes, got %d bytes", hdr.Name, hdr.Size, n)
+							break
+						}
+					}
+				}
+				hdr, err = tarReader.Next()
+			}
+			if err != io.EOF {
+				filterer.err = errors.Wrapf(err, "error reading tar archive")
+				break
+			}
+			filterer.closedLock.Lock()
+			closed = filterer.closed
+			filterer.closedLock.Unlock()
+		}
+		pipeReader.Close()
+		tarWriter.Close()
+		writeCloser.Close()
+		filterer.wg.Done()
+	}()
+	return filterer
+}
+
+// A tar digester digests an archive, modifying the headers it digests by
+// calling a specified function to potentially modify the header that it's
+// about to write.
+type tarDigester struct {
+	isOpen      bool
+	nested      digester
+	tarFilterer io.WriteCloser
+}
+
+func newTarDigester(contentType string) digester {
+	nested := newSimpleDigester(contentType)
+	digester := &tarDigester{
+		isOpen:      true,
+		nested:      nested,
+		tarFilterer: nested,
+	}
+	return digester
+}
+
+func (t *tarDigester) ContentType() string {
+	return t.nested.ContentType()
+}
+
+func (t *tarDigester) Digest() digest.Digest {
+	return t.nested.Digest()
+}
+
+func (t *tarDigester) Write(p []byte) (int, error) {
+	return t.tarFilterer.Write(p)
+}
+
+func (t *tarDigester) Close() error {
+	if t.isOpen {
+		t.isOpen = false
+		return t.tarFilterer.Close()
+	}
+	return nil
 }
 
 // CompositeDigester can compute a digest over multiple items.
 type CompositeDigester struct {
-	digesters []singleDigester
+	digesters []digester
+	closer    io.Closer
+}
+
+// closeOpenDigester closes an open sub-digester, if we have one.
+func (c *CompositeDigester) closeOpenDigester() {
+	if c.closer != nil {
+		c.closer.Close()
+		c.closer = nil
+	}
 }
 
 // Restart clears all state, so that the composite digester can start over.
 func (c *CompositeDigester) Restart() {
+	c.closeOpenDigester()
 	c.digesters = nil
 }
 
-// Start starts recording the digest for a new item.  The caller should call
-// Hash() immediately after to retrieve the new io.Writer.
-func (c *CompositeDigester) Start(prefix string) {
-	prefix = strings.TrimSuffix(prefix, ":")
-	c.digesters = append(c.digesters, singleDigester{digester: digest.Canonical.Digester(), prefix: prefix})
+// Start starts recording the digest for a new item ("", "file", or "dir").
+// The caller should call Hash() immediately after to retrieve the new
+// io.WriteCloser.
+func (c *CompositeDigester) Start(contentType string) {
+	c.closeOpenDigester()
+	switch contentType {
+	case "":
+		c.digesters = append(c.digesters, newSimpleDigester(""))
+	case "file", "dir":
+		digester := newTarDigester(contentType)
+		c.closer = digester
+		c.digesters = append(c.digesters, digester)
+	default:
+		panic(fmt.Sprintf(`unrecognized content type: expected "", "file", or "dir", got %q`, contentType))
+	}
 }
 
 // Hash returns the hasher for the current item.
-func (c *CompositeDigester) Hash() hash.Hash {
+func (c *CompositeDigester) Hash() io.WriteCloser {
 	num := len(c.digesters)
 	if num == 0 {
 		return nil
 	}
-	return c.digesters[num-1].digester.Hash()
+	return c.digesters[num-1]
 }
 
-// Digest returns the prefix and a composite digest over everything that's been
-// digested.
+// Digest returns the content type and a composite digest over everything
+// that's been digested.
 func (c *CompositeDigester) Digest() (string, digest.Digest) {
+	c.closeOpenDigester()
 	num := len(c.digesters)
 	switch num {
 	case 0:
 		return "", ""
 	case 1:
-		return c.digesters[0].prefix, c.digesters[0].digester.Digest()
+		return c.digesters[0].ContentType(), c.digesters[0].Digest()
 	default:
 		content := ""
 		for i, digester := range c.digesters {
 			if i > 0 {
 				content += ","
 			}
-			prefix := digester.prefix
-			if digester.prefix != "" {
-				digester.prefix += ":"
+			contentType := digester.ContentType()
+			if contentType != "" {
+				contentType += ":"
 			}
-			content += prefix + digester.digester.Digest().Encoded()
+			content += contentType + digester.Digest().Encoded()
 		}
 		return "multi", digest.Canonical.FromString(content)
 	}
diff --git a/vendor/github.com/containers/buildah/go.mod b/vendor/github.com/containers/buildah/go.mod
index 15834256c..c4d70e795 100644
--- a/vendor/github.com/containers/buildah/go.mod
+++ b/vendor/github.com/containers/buildah/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/containernetworking/cni v0.7.2-0.20190904153231-83439463f784
 	github.com/containers/common v0.15.2
 	github.com/containers/image/v5 v5.5.1
-	github.com/containers/ocicrypt v1.0.2
+	github.com/containers/ocicrypt v1.0.3
 	github.com/containers/storage v1.20.2
 	github.com/cyphar/filepath-securejoin v0.2.2
 	github.com/docker/distribution v2.7.1+incompatible
@@ -17,14 +17,14 @@ require (
 	github.com/hashicorp/go-multierror v1.0.0
 	github.com/ishidawataru/sctp v0.0.0-20191218070446-00ab2ac2db07 // indirect
 	github.com/mattn/go-shellwords v1.0.10
-	github.com/onsi/ginkgo v1.13.0
+	github.com/onsi/ginkgo v1.14.0
 	github.com/onsi/gomega v1.10.1
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.0.2-0.20190823105129-775207bd45b6
 	github.com/opencontainers/runc v1.0.0-rc91
 	github.com/opencontainers/runtime-spec v1.0.3-0.20200520003142-237cc4f519e2
 	github.com/opencontainers/runtime-tools v0.9.0
-	github.com/opencontainers/selinux v1.5.2
+	github.com/opencontainers/selinux v1.6.0
 	github.com/openshift/imagebuilder v1.1.6
 	github.com/pkg/errors v0.9.1
 	github.com/seccomp/containers-golang v0.5.0
@@ -38,6 +38,8 @@ require (
 	golang.org/x/crypto v0.0.0-20200423211502-4bdfaf469ed5
 	golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a
 	golang.org/x/sys v0.0.0-20200519105757-fe76b779f299
+	golang.org/x/text v0.3.3 // indirect
+	k8s.io/klog v1.0.0 // indirect
 )
 
 replace github.com/sirupsen/logrus => github.com/sirupsen/logrus v1.4.2
diff --git a/vendor/github.com/containers/buildah/go.sum b/vendor/github.com/containers/buildah/go.sum
index 718d44909..1ea944af7 100644
--- a/vendor/github.com/containers/buildah/go.sum
+++ b/vendor/github.com/containers/buildah/go.sum
@@ -59,6 +59,8 @@ github.com/containers/libtrust v0.0.0-20190913040956-14b96171aa3b h1:Q8ePgVfHDpl
 github.com/containers/libtrust v0.0.0-20190913040956-14b96171aa3b/go.mod h1:9rfv8iPl1ZP7aqh9YA68wnZv2NUDbXdcdPHVz0pFbPY=
 github.com/containers/ocicrypt v1.0.2 h1:Q0/IPs8ohfbXNxEfyJ2pFVmvJu5BhqJUAmc6ES9NKbo=
 github.com/containers/ocicrypt v1.0.2/go.mod h1:nsOhbP19flrX6rE7ieGFvBlr7modwmNjsqWarIUce4M=
+github.com/containers/ocicrypt v1.0.3 h1:vYgl+RZ9Q3DPMuTfxmN+qp0X2Bj52uuY2vnt6GzVe1c=
+github.com/containers/ocicrypt v1.0.3/go.mod h1:CUBa+8MRNL/VkpxYIpaMtgn1WgXGyvPQj8jcy0EVG6g=
 github.com/containers/storage v1.20.2 h1:tw/uKRPDnmVrluIzer3dawTFG/bTJLP8IEUyHFhltYk=
 github.com/containers/storage v1.20.2/go.mod h1:oOB9Ie8OVPojvoaKWEGSEtHbXUAs+tSyr7RO7ZGteMc=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -111,6 +113,7 @@ github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeME
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
+github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/godbus/dbus v0.0.0-20190422162347-ade71ed3457e h1:BWhy2j3IXJhjCbC68FptL43tDKIq8FladmaTs3Xs7Z8=
 github.com/godbus/dbus v0.0.0-20190422162347-ade71ed3457e/go.mod h1:bBOAhwG1umN6/6ZUMtDFBMQR8jRg9O75tm9K00oMsK4=
@@ -221,6 +224,8 @@ github.com/onsi/ginkgo v1.12.1 h1:mFwc4LvZ0xpSvDZ3E+k8Yte0hLOMxXUlP+yXtJqkYfQ=
 github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk=
 github.com/onsi/ginkgo v1.13.0 h1:M76yO2HkZASFjXL0HSoZJ1AYEmQxNJmY41Jx1zNUq1Y=
 github.com/onsi/ginkgo v1.13.0/go.mod h1:+REjRxOmWfHCjfv9TTWB1jD1Frx4XydAD3zm1lskyM0=
+github.com/onsi/ginkgo v1.14.0 h1:2mOpI4JVVPBN+WQRa0WKH2eXR+Ey+uK4n7Zj0aYpIQA=
+github.com/onsi/ginkgo v1.14.0/go.mod h1:iSB4RoI2tjJc9BBv4NKIKWKya62Rps+oPG/Lv9klQyY=
 github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
 github.com/onsi/gomega v1.10.1 h1:o0+MgICZLuZ7xjH7Vx6zS/zcu93/BEp1VwkIW1mEXCE=
@@ -249,6 +254,8 @@ github.com/opencontainers/selinux v1.5.1 h1:jskKwSMFYqyTrHEuJgQoUlTcId0av64S6EWO
 github.com/opencontainers/selinux v1.5.1/go.mod h1:yTcKuYAh6R95iDpefGLQaPaRwJFwyzAJufJyiTt7s0g=
 github.com/opencontainers/selinux v1.5.2 h1:F6DgIsjgBIcDksLW4D5RG9bXok6oqZ3nvMwj4ZoFu/Q=
 github.com/opencontainers/selinux v1.5.2/go.mod h1:yTcKuYAh6R95iDpefGLQaPaRwJFwyzAJufJyiTt7s0g=
+github.com/opencontainers/selinux v1.6.0 h1:+bIAS/Za3q5FTwWym4fTB0vObnfCf3G/NC7K6Jx62mY=
+github.com/opencontainers/selinux v1.6.0/go.mod h1:VVGKuOLlE7v4PJyT6h7mNWvq1rzqiriPsEqVhc+svHE=
 github.com/openshift/imagebuilder v1.1.6 h1:1+YzRxIIefY4QqtCImx6rg+75QrKNfBoPAKxgMo/khM=
 github.com/openshift/imagebuilder v1.1.6/go.mod h1:9aJRczxCH0mvT6XQ+5STAQaPWz7OsWcU5/mRkt8IWeo=
 github.com/ostreedev/ostree-go v0.0.0-20190702140239-759a8c1ac913 h1:TnbXhKzrTOyuvWrjI8W6pcoI9XPbLHFXCdN2dtUw7Rw=
@@ -338,6 +345,8 @@ github.com/vishvananda/netlink v1.1.0 h1:1iyaYNBLmP6L0220aDnYQpo1QEV4t4hJ+xEEhhJ
 github.com/vishvananda/netlink v1.1.0/go.mod h1:cTgwzPIzzgDAYoQrMm0EdrjRUBkTqKYppBueQtXaqoE=
 github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df h1:OviZH7qLw/7ZovXvuNyL3XQl8UFofeikI1NW1Gypu7k=
 github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU=
+github.com/willf/bitset v1.1.11-0.20200630133818-d5bec3311243 h1:R43TdZy32XXSXjJn7M/HhALJ9imq6ztLnChfYJpVDnM=
+github.com/willf/bitset v1.1.11-0.20200630133818-d5bec3311243/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
 github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
 github.com/xeipuuv/gojsonpointer v0.0.0-20190809123943-df4f5c81cb3b h1:6cLsL+2FW6dRAdl5iMtHgRogVCff0QpRi9653YmdcJA=
 github.com/xeipuuv/gojsonpointer v0.0.0-20190809123943-df4f5c81cb3b/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
@@ -353,6 +362,8 @@ go.etcd.io/bbolt v1.3.4 h1:hi1bXHMVrlQh6WwxAy+qZCV/SYIlqo+Ushwdpa4tAKg=
 go.etcd.io/bbolt v1.3.4/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
 go.etcd.io/bbolt v1.3.5 h1:XAzx9gjCb0Rxj7EoqcClPD1d5ZBxZJk0jbuoPHenBt0=
 go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
+go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1 h1:A/5uWzF44DlIgdm/PQFwfMkW0JX+cIcQi/SwLAmZP5M=
+go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1/go.mod h1:SNgMg+EgDFwmvSmLRTNKC5fegJjB7v23qTQ0XLGUNHk=
 go.opencensus.io v0.22.0 h1:C9hSCOW830chIVkdja34wa6Ky+IzWllkUinR+BtRZd4=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
@@ -418,6 +429,8 @@ golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0 h1:/5xXl8Y5W96D+TtHSlonuFqGHIWVuyCkGJLwGh9JJFs=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -478,4 +491,6 @@ gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
+k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
 k8s.io/kubernetes v1.13.0/go.mod h1:ocZa8+6APFNC2tX1DZASIbocyYT5jHzqFVsY5aoB7Jk=
diff --git a/vendor/github.com/containers/buildah/imagebuildah/build.go b/vendor/github.com/containers/buildah/imagebuildah/build.go
index 12dca36b9..1fa276d01 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/build.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/build.go
@@ -132,7 +132,8 @@ type BuildOptions struct {
 	// when handling RUN instructions. If a capability appears in both lists, it
 	// will be dropped.
 	DropCapabilities []string
-	CommonBuildOpts  *buildah.CommonBuildOptions
+	// CommonBuildOpts is *required*.
+	CommonBuildOpts *buildah.CommonBuildOptions
 	// DefaultMountsFilePath is the file path holding the mounts to be mounted in "host-path:container-path" format
 	DefaultMountsFilePath string
 	// IIDFile tells the builder to write the image ID to the specified file
diff --git a/vendor/github.com/containers/buildah/imagebuildah/executor.go b/vendor/github.com/containers/buildah/imagebuildah/executor.go
index 93b25887f..943e2c8cc 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/executor.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/executor.go
@@ -251,8 +251,9 @@ func NewExecutor(store storage.Store, options BuildOptions, mainNode *parser.Nod
 
 // startStage creates a new stage executor that will be referenced whenever a
 // COPY or ADD statement uses a --from=NAME flag.
-func (b *Executor) startStage(stage *imagebuilder.Stage, stages imagebuilder.Stages, output string) *StageExecutor {
+func (b *Executor) startStage(ctx context.Context, stage *imagebuilder.Stage, stages imagebuilder.Stages, output string) *StageExecutor {
 	stageExec := &StageExecutor{
+		ctx:             ctx,
 		executor:        b,
 		index:           stage.Position,
 		stages:          stages,
@@ -289,17 +290,24 @@ func (b *Executor) resolveNameToImageRef(output string) (types.ImageReference, e
 	return imageRef, nil
 }
 
-func (b *Executor) waitForStage(ctx context.Context, name string) error {
-	stage := b.stages[name]
-	if stage == nil {
-		return errors.Errorf("unknown stage %q", name)
+// waitForStage waits for an entry to be added to terminatedStage indicating
+// that the specified stage has finished.  If there is no stage defined by that
+// name, then it will return (false, nil).  If there is a stage defined by that
+// name, it will return true along with any error it encounters.
+func (b *Executor) waitForStage(ctx context.Context, name string, stages imagebuilder.Stages) (bool, error) {
+	found := false
+	for _, otherStage := range stages {
+		if otherStage.Name == name || fmt.Sprintf("%d", otherStage.Position) == name {
+			found = true
+			break
+		}
+	}
+	if !found {
+		return false, nil
 	}
 	for {
 		if b.lastError != nil {
-			return b.lastError
-		}
-		if stage.stage == nil {
-			return nil
+			return true, b.lastError
 		}
 
 		b.stagesLock.Lock()
@@ -307,13 +315,13 @@ func (b *Executor) waitForStage(ctx context.Context, name string) error {
 		b.stagesLock.Unlock()
 
 		if terminated {
-			return nil
+			return true, nil
 		}
 
 		b.stagesSemaphore.Release(1)
 		time.Sleep(time.Millisecond * 10)
 		if err := b.stagesSemaphore.Acquire(ctx, 1); err != nil {
-			return errors.Wrapf(err, "error reacquiring job semaphore")
+			return true, errors.Wrapf(err, "error reacquiring job semaphore")
 		}
 	}
 }
@@ -355,7 +363,7 @@ func (b *Executor) buildStage(ctx context.Context, cleanupStages map[int]*StageE
 	}
 
 	b.stagesLock.Lock()
-	stageExecutor := b.startStage(&stage, stages, output)
+	stageExecutor := b.startStage(ctx, &stage, stages, output)
 	b.stagesLock.Unlock()
 
 	// If this a single-layer build, or if it's a multi-layered
@@ -531,19 +539,19 @@ func (b *Executor) Build(ctx context.Context, stages imagebuilder.Stages) (image
 			go func() {
 				defer b.stagesSemaphore.Release(1)
 				defer wg.Done()
-				imageID, ref, err = b.buildStage(ctx, cleanupStages, stages, index)
-				if err != nil {
+				stageID, stageRef, stageErr := b.buildStage(ctx, cleanupStages, stages, index)
+				if stageErr != nil {
 					ch <- Result{
 						Index: index,
-						Error: err,
+						Error: stageErr,
 					}
 					return
 				}
 
 				ch <- Result{
 					Index:   index,
-					ImageID: imageID,
-					Ref:     ref,
+					ImageID: stageID,
+					Ref:     stageRef,
 					Error:   nil,
 				}
 			}()
@@ -559,6 +567,7 @@ func (b *Executor) Build(ctx context.Context, stages imagebuilder.Stages) (image
 
 		b.stagesLock.Lock()
 		b.terminatedStage[stage.Name] = struct{}{}
+		b.terminatedStage[fmt.Sprintf("%d", stage.Position)] = struct{}{}
 		b.stagesLock.Unlock()
 
 		if r.Error != nil {
@@ -569,7 +578,9 @@ func (b *Executor) Build(ctx context.Context, stages imagebuilder.Stages) (image
 		// If this is an intermediate stage, make a note of the ID, so
 		// that we can look it up later.
 		if r.Index < len(stages)-1 && r.ImageID != "" {
+			b.stagesLock.Lock()
 			b.imageMap[stage.Name] = r.ImageID
+			b.stagesLock.Unlock()
 			// We're not populating the cache with intermediate
 			// images, so add this one to the list of images that
 			// we'll remove later.
@@ -579,6 +590,7 @@ func (b *Executor) Build(ctx context.Context, stages imagebuilder.Stages) (image
 		}
 		if r.Index == len(stages)-1 {
 			imageID = r.ImageID
+			ref = r.Ref
 		}
 	}
 
diff --git a/vendor/github.com/containers/buildah/imagebuildah/stage_executor.go b/vendor/github.com/containers/buildah/imagebuildah/stage_executor.go
index 9dc5c1b97..5b5828d01 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/stage_executor.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/stage_executor.go
@@ -44,6 +44,7 @@ import (
 // If we're naming the result of the build, only the last stage will apply that
 // name to the image that it produces.
 type StageExecutor struct {
+	ctx             context.Context
 	executor        *Executor
 	index           int
 	stages          imagebuilder.Stages
@@ -262,7 +263,7 @@ func (s *StageExecutor) volumeCacheRestore() error {
 // don't care about the details of where in the filesystem the content actually
 // goes, because we're not actually going to add it here, so this is less
 // involved than Copy().
-func (s *StageExecutor) digestSpecifiedContent(node *parser.Node, argValues []string, envValues []string) (string, error) {
+func (s *StageExecutor) digestSpecifiedContent(ctx context.Context, node *parser.Node, argValues []string, envValues []string) (string, error) {
 	// No instruction: done.
 	if node == nil {
 		return "", nil
@@ -295,6 +296,9 @@ func (s *StageExecutor) digestSpecifiedContent(node *parser.Node, argValues []st
 			// container.  Update the ID mappings and
 			// all-content-comes-from-below-this-directory value.
 			from := strings.TrimPrefix(flag, "--from=")
+			if isStage, err := s.executor.waitForStage(ctx, from, s.stages[:s.index]); isStage && err != nil {
+				return "", err
+			}
 			if other, ok := s.executor.stages[from]; ok && other.index < s.index {
 				contextDir = other.mountPoint
 				idMappingOptions = &other.builder.IDMappingOptions
@@ -422,6 +426,9 @@ func (s *StageExecutor) Copy(excludes []string, copies ...imagebuilder.Copy) err
 		var copyExcludes []string
 		contextDir := s.executor.contextDir
 		if len(copy.From) > 0 {
+			if isStage, err := s.executor.waitForStage(s.ctx, copy.From, s.stages[:s.index]); isStage && err != nil {
+				return err
+			}
 			if other, ok := s.executor.stages[copy.From]; ok && other.index < s.index {
 				contextDir = other.mountPoint
 				idMappingOptions = &other.builder.IDMappingOptions
@@ -638,9 +645,11 @@ func (s *StageExecutor) prepare(ctx context.Context, from string, initializeIBCo
 
 	// Check and see if the image is a pseudonym for the end result of a
 	// previous stage, named by an AS clause in the Dockerfile.
+	s.executor.stagesLock.Lock()
 	if asImageFound, ok := s.executor.imageMap[from]; ok {
 		builderOptions.FromImage = asImageFound
 	}
+	s.executor.stagesLock.Unlock()
 	builder, err = buildah.NewBuilder(ctx, s.executor.store, builderOptions)
 	if err != nil {
 		return nil, errors.Wrapf(err, "error creating build container")
@@ -763,16 +772,14 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 	// substitute that image's ID for the base image's name here.  If not,
 	// then go on assuming that it's just a regular image that's either in
 	// local storage, or one that we have to pull from a registry.
-	for _, previousStage := range s.stages[:s.index] {
-		if previousStage.Name == base {
-			if err := s.executor.waitForStage(ctx, previousStage.Name); err != nil {
-				return "", nil, err
-			}
-		}
+	if isStage, err := s.executor.waitForStage(ctx, base, s.stages[:s.index]); isStage && err != nil {
+		return "", nil, err
 	}
+	s.executor.stagesLock.Lock()
 	if stageImage, isPreviousStage := s.executor.imageMap[base]; isPreviousStage {
 		base = stageImage
 	}
+	s.executor.stagesLock.Unlock()
 
 	// Create the (first) working container for this stage.  Reinitializing
 	// the imagebuilder configuration may alter the list of steps we have,
@@ -876,10 +883,13 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 				if len(arr) != 2 {
 					return "", nil, errors.Errorf("%s: invalid --from flag, should be --from=<name|stage>", command)
 				}
+				// If the source's name corresponds to the
+				// result of an earlier stage, wait for that
+				// stage to finish being built.
+				if isStage, err := s.executor.waitForStage(ctx, arr[1], s.stages[:s.index]); isStage && err != nil {
+					return "", nil, err
+				}
 				if otherStage, ok := s.executor.stages[arr[1]]; ok && otherStage.index < s.index {
-					if err := s.executor.waitForStage(ctx, otherStage.name); err != nil {
-						return "", nil, err
-					}
 					mountPoint = otherStage.mountPoint
 				} else if mountPoint, err = s.getImageRootfs(ctx, arr[1]); err != nil {
 					return "", nil, errors.Errorf("%s --from=%s: no stage or image found with that name", command, arr[1])
@@ -907,7 +917,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 				return "", nil, errors.Wrapf(err, "error building at STEP \"%s\"", step.Message)
 			}
 			// In case we added content, retrieve its digest.
-			addedContentDigest, err := s.digestSpecifiedContent(node, ib.Arguments(), ib.Config().Env)
+			addedContentDigest, err := s.digestSpecifiedContent(ctx, node, ib.Arguments(), ib.Config().Env)
 			if err != nil {
 				return "", nil, err
 			}
@@ -956,7 +966,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 		// cached images so far, look for one that matches what we
 		// expect to produce for this instruction.
 		if checkForLayers && !(s.executor.squash && lastInstruction && lastStage) {
-			addedContentDigest, err := s.digestSpecifiedContent(node, ib.Arguments(), ib.Config().Env)
+			addedContentDigest, err := s.digestSpecifiedContent(ctx, node, ib.Arguments(), ib.Config().Env)
 			if err != nil {
 				return "", nil, err
 			}
@@ -1014,7 +1024,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 				return "", nil, errors.Wrapf(err, "error building at STEP \"%s\"", step.Message)
 			}
 			// In case we added content, retrieve its digest.
-			addedContentDigest, err := s.digestSpecifiedContent(node, ib.Arguments(), ib.Config().Env)
+			addedContentDigest, err := s.digestSpecifiedContent(ctx, node, ib.Arguments(), ib.Config().Env)
 			if err != nil {
 				return "", nil, err
 			}
diff --git a/vendor/github.com/containers/buildah/install.md b/vendor/github.com/containers/buildah/install.md
index c29ff1eb8..03c9b2720 100644
--- a/vendor/github.com/containers/buildah/install.md
+++ b/vendor/github.com/containers/buildah/install.md
@@ -221,7 +221,7 @@ as yum, dnf or apt-get on a number of Linux distributions.
 
 Prior to installing Buildah, install the following packages on your Linux distro:
 * make
-* golang (Requires version 1.12 or higher.)
+* golang (Requires version 1.13 or higher.)
 * bats
 * btrfs-progs-devel
 * bzip2
@@ -332,7 +332,7 @@ In Ubuntu zesty and xenial, you can use these commands:
   sudo apt-add-repository -y ppa:projectatomic/ppa
   sudo apt-get -y -qq update
   sudo apt-get -y install bats btrfs-tools git libapparmor-dev libdevmapper-dev libglib2.0-dev libgpgme11-dev libseccomp-dev libselinux1-dev skopeo-containers go-md2man
-  sudo apt-get -y install golang-1.12
+  sudo apt-get -y install golang-1.13
 ```
 Then to install Buildah on Ubuntu follow the steps in this example:
 
@@ -342,7 +342,7 @@ Then to install Buildah on Ubuntu follow the steps in this example:
   export GOPATH=`pwd`
   git clone https://github.com/containers/buildah ./src/github.com/containers/buildah
   cd ./src/github.com/containers/buildah
-  PATH=/usr/lib/go-1.12/bin:$PATH make runc all SECURITYTAGS="apparmor seccomp"
+  PATH=/usr/lib/go-1.13/bin:$PATH make runc all SECURITYTAGS="apparmor seccomp"
   sudo make install install.runc
   buildah --help
 ```
@@ -433,7 +433,7 @@ cat /usr/share/containers/mounts.conf
 
 `/usr/share/containers/seccomp.json`
 
-seccomp.json contains the whitelist of seccomp rules to be allowed inside of
+seccomp.json contains the list of seccomp rules to be allowed inside of
 containers.  This file is usually provided by the containers-common package.
 
 The link above takes you to the seccomp.json
diff --git a/vendor/github.com/containers/buildah/pkg/blobcache/blobcache.go b/vendor/github.com/containers/buildah/pkg/blobcache/blobcache.go
index b7f704615..3f0177226 100644
--- a/vendor/github.com/containers/buildah/pkg/blobcache/blobcache.go
+++ b/vendor/github.com/containers/buildah/pkg/blobcache/blobcache.go
@@ -275,12 +275,11 @@ func (s *blobCacheSource) LayerInfosForCopy(ctx context.Context, instanceDigest
 		return nil, errors.Wrapf(err, "error getting layer infos for copying image %q through cache", transports.ImageName(s.reference))
 	}
 	if infos == nil {
-		image, err := s.reference.NewImage(ctx, &s.sys)
+		img, err := image.FromUnparsedImage(ctx, &s.sys, image.UnparsedInstance(s.source, instanceDigest))
 		if err != nil {
 			return nil, errors.Wrapf(err, "error opening image to get layer infos for copying image %q through cache", transports.ImageName(s.reference))
 		}
-		defer image.Close()
-		infos = image.LayerInfos()
+		infos = img.LayerInfos()
 	}
 
 	if canReplaceBlobs && s.reference.compress != types.PreserveOriginal {
diff --git a/vendor/github.com/containers/buildah/pkg/parse/parse.go b/vendor/github.com/containers/buildah/pkg/parse/parse.go
index 4bb760683..656a7c654 100644
--- a/vendor/github.com/containers/buildah/pkg/parse/parse.go
+++ b/vendor/github.com/containers/buildah/pkg/parse/parse.go
@@ -17,6 +17,7 @@ import (
 	"github.com/containers/buildah"
 	"github.com/containers/image/v5/types"
 	"github.com/containers/storage/pkg/idtools"
+	"github.com/containers/storage/pkg/unshare"
 	units "github.com/docker/go-units"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/pkg/errors"
@@ -342,6 +343,9 @@ func GetBindMount(args []string) (specs.Mount, error) {
 			// TODO: detect duplication of these options.
 			// (Is this necessary?)
 			newMount.Options = append(newMount.Options, kv[0])
+		case "readonly":
+			// Alias for "ro"
+			newMount.Options = append(newMount.Options, "ro")
 		case "shared", "rshared", "private", "rprivate", "slave", "rslave", "Z", "z":
 			newMount.Options = append(newMount.Options, kv[0])
 		case "bind-propagation":
@@ -367,6 +371,10 @@ func GetBindMount(args []string) (specs.Mount, error) {
 			}
 			newMount.Destination = kv[1]
 			setDest = true
+		case "consistency":
+			// Option for OS X only, has no meaning on other platforms
+			// and can thus be safely ignored.
+			// See also the handling of the equivalent "delegated" and "cached" in ValidateVolumeOpts
 		default:
 			return newMount, errors.Wrapf(errBadMntOption, kv[0])
 		}
@@ -403,6 +411,9 @@ func GetTmpfsMount(args []string) (specs.Mount, error) {
 		switch kv[0] {
 		case "ro", "nosuid", "nodev", "noexec":
 			newMount.Options = append(newMount.Options, kv[0])
+		case "readonly":
+			// Alias for "ro"
+			newMount.Options = append(newMount.Options, "ro")
 		case "tmpfs-mode":
 			if len(kv) == 1 {
 				return newMount, errors.Wrapf(optionArgError, kv[0])
@@ -907,6 +918,9 @@ func defaultIsolation() (buildah.Isolation, error) {
 			return 0, errors.Errorf("unrecognized $BUILDAH_ISOLATION value %q", isolation)
 		}
 	}
+	if unshare.IsRootless() {
+		return buildah.IsolationOCIRootless, nil
+	}
 	return buildah.IsolationDefault, nil
 }
 
diff --git a/vendor/github.com/containers/buildah/run_linux.go b/vendor/github.com/containers/buildah/run_linux.go
index d419bb082..3af9049b7 100644
--- a/vendor/github.com/containers/buildah/run_linux.go
+++ b/vendor/github.com/containers/buildah/run_linux.go
@@ -394,7 +394,10 @@ func (b *Builder) setupMounts(mountPoint string, spec *specs.Spec, bundlePath st
 	for _, specMount := range spec.Mounts {
 		// Override some of the mounts from the generated list if we're doing different things with namespaces.
 		if specMount.Destination == "/dev/shm" {
-			specMount.Options = []string{"nosuid", "noexec", "nodev", "mode=1777", "size=" + shmSize}
+			specMount.Options = []string{"nosuid", "noexec", "nodev", "mode=1777"}
+			if shmSize != "" {
+				specMount.Options = append(specMount.Options, "size="+shmSize)
+			}
 			if hostIPC && !hostUser {
 				if _, err := os.Stat("/dev/shm"); err != nil && os.IsNotExist(err) {
 					logrus.Debugf("/dev/shm is not present, not binding into container")
@@ -841,13 +844,8 @@ func runUsingRuntime(isolation Isolation, options RunOptions, configureNetwork b
 	stopped := false
 	defer func() {
 		if !stopped {
-			err2 := kill.Run()
-			if err2 != nil {
-				if err == nil {
-					err = errors.Wrapf(err2, "error stopping container")
-				} else {
-					logrus.Infof("error stopping container: %v", err2)
-				}
+			if err2 := kill.Run(); err2 != nil {
+				logrus.Infof("error stopping container: %v", err2)
 			}
 		}
 	}()
@@ -1779,6 +1777,8 @@ func setupMaskedPaths(g *generate.Generator) {
 		"/proc/sched_debug",
 		"/proc/scsi",
 		"/sys/firmware",
+		"/sys/fs/selinux",
+		"/sys/dev",
 	} {
 		g.AddLinuxMaskedPaths(mp)
 	}
@@ -1966,7 +1966,7 @@ func (b *Builder) configureEnvironment(g *generate.Generator, options RunOptions
 		}
 	}
 
-	for _, envSpec := range append(append(defaultEnv, b.Env()...), options.Env...) {
+	for _, envSpec := range util.MergeEnv(util.MergeEnv(defaultEnv, b.Env()), options.Env) {
 		env := strings.SplitN(envSpec, "=", 2)
 		if len(env) > 1 {
 			g.AddProcessEnv(env[0], env[1])
@@ -2023,13 +2023,10 @@ func setupRootlessSpecChanges(spec *specs.Spec, bundleDir string, shmSize string
 			Options:     []string{bind.NoBindOption, "rbind", "private", "nodev", "noexec", "nosuid", "ro"},
 		},
 	}
-	// Cover up /sys/fs/cgroup and /sys/fs/selinux, if they exist in our source for /sys.
+	// Cover up /sys/fs/cgroup, if it exist in our source for /sys.
 	if _, err := os.Stat("/sys/fs/cgroup"); err == nil {
 		spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/cgroup")
 	}
-	if _, err := os.Stat("/sys/fs/selinux"); err == nil {
-		spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/selinux")
-	}
 	// Keep anything that isn't under /dev, /proc, or /sys.
 	for i := range spec.Mounts {
 		if spec.Mounts[i].Destination == "/dev" || strings.HasPrefix(spec.Mounts[i].Destination, "/dev/") ||
@@ -2073,7 +2070,7 @@ func (b *Builder) runUsingRuntimeSubproc(isolation Isolation, options RunOptions
 	if cmd.Stderr == nil {
 		cmd.Stderr = os.Stderr
 	}
-	cmd.Env = append(os.Environ(), fmt.Sprintf("LOGLEVEL=%d", logrus.GetLevel()))
+	cmd.Env = util.MergeEnv(os.Environ(), []string{fmt.Sprintf("LOGLEVEL=%d", logrus.GetLevel())})
 	preader, pwriter, err := os.Pipe()
 	if err != nil {
 		return errors.Wrapf(err, "error creating configuration pipe")
diff --git a/vendor/github.com/containers/buildah/troubleshooting.md b/vendor/github.com/containers/buildah/troubleshooting.md
index 4ff2f06c4..afd9c640a 100644
--- a/vendor/github.com/containers/buildah/troubleshooting.md
+++ b/vendor/github.com/containers/buildah/troubleshooting.md
@@ -76,7 +76,7 @@ the `buildah run` command will not complete and an error will be raised.
 
 #### Solution
 There are two solutions to this problem.  The
-[`podman run`](https://github.com/containers/libpod/blob/master/docs/podman-run.1.md)
+[`podman run`](https://github.com/containers/podman/blob/master/docs/podman-run.1.md)
 command can be used in place of `buildah run`.  To still use `buildah run`, surround
 the command with single quotes and use `bash -c`.  The previous examples would be
 changed to:
diff --git a/vendor/github.com/containers/buildah/util/util.go b/vendor/github.com/containers/buildah/util/util.go
index f41daa2cc..00efc8d21 100644
--- a/vendor/github.com/containers/buildah/util/util.go
+++ b/vendor/github.com/containers/buildah/util/util.go
@@ -469,3 +469,19 @@ func FindLocalRuntime(runtime string) string {
 	}
 	return localRuntime
 }
+
+// MergeEnv merges two lists of environment variables, avoiding duplicates.
+func MergeEnv(defaults, overrides []string) []string {
+	s := make([]string, 0, len(defaults)+len(overrides))
+	index := make(map[string]int)
+	for _, envSpec := range append(defaults, overrides...) {
+		envVar := strings.SplitN(envSpec, "=", 2)
+		if i, ok := index[envVar[0]]; ok {
+			s[i] = envSpec
+			continue
+		}
+		s = append(s, envSpec)
+		index[envVar[0]] = len(s) - 1
+	}
+	return s
+}
diff --git a/vendor/github.com/containers/ocicrypt/.travis.yml b/vendor/github.com/containers/ocicrypt/.travis.yml
new file mode 100644
index 000000000..a5fc8651c
--- /dev/null
+++ b/vendor/github.com/containers/ocicrypt/.travis.yml
@@ -0,0 +1,22 @@
+dist: xenial
+language: go
+
+os:
+- linux
+
+go:
+  - "1.13.x"
+
+matrix:
+  include:
+    - os: linux
+
+go_import_path: github.com/containers/ocicrypt
+
+install:
+  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.19.1
+
+script:
+  - make
+  - make check
+  - make test
diff --git a/vendor/github.com/containers/ocicrypt/SECURITY.md b/vendor/github.com/containers/ocicrypt/SECURITY.md
new file mode 100644
index 000000000..30124c89f
--- /dev/null
+++ b/vendor/github.com/containers/ocicrypt/SECURITY.md
@@ -0,0 +1,3 @@
+## Security and Disclosure Information Policy for the OCIcrypt Library Project
+
+The OCIcrypt Library Project follows the [Security and Disclosure Information Policy](https://github.com/containers/common/blob/master/SECURITY.md) for the Containers Projects.
diff --git a/vendor/github.com/containers/ocicrypt/go.mod b/vendor/github.com/containers/ocicrypt/go.mod
index 002a526b5..5e6bc2a75 100644
--- a/vendor/github.com/containers/ocicrypt/go.mod
+++ b/vendor/github.com/containers/ocicrypt/go.mod
@@ -3,15 +3,13 @@ module github.com/containers/ocicrypt
 go 1.12
 
 require (
-	github.com/containerd/containerd v1.2.10
-	github.com/fullsailor/pkcs7 v0.0.0-20190404230743-d7302db945fa
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/opencontainers/go-digest v1.0.0-rc1
 	github.com/opencontainers/image-spec v1.0.1
 	github.com/pkg/errors v0.8.1
-	github.com/sirupsen/logrus v1.4.2 // indirect
 	github.com/stretchr/testify v1.3.0 // indirect
+	go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1
 	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
-	google.golang.org/grpc v1.24.0 // indirect
+	golang.org/x/sys v0.0.0-20190422165155-953cdadca894 // indirect
 	gopkg.in/square/go-jose.v2 v2.3.1
-	gotest.tools v2.2.0+incompatible // indirect
 )
diff --git a/vendor/github.com/containers/ocicrypt/go.sum b/vendor/github.com/containers/ocicrypt/go.sum
index 935d373d2..6b4e83d75 100644
--- a/vendor/github.com/containers/ocicrypt/go.sum
+++ b/vendor/github.com/containers/ocicrypt/go.sum
@@ -1,23 +1,7 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/containerd/containerd v1.2.10 h1:liQDhXqIn7y6cJ/7qBgOaZsiTZJc56/wkkhDBiDBRDw=
-github.com/containerd/containerd v1.2.10/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fullsailor/pkcs7 v0.0.0-20190404230743-d7302db945fa h1:RDBNVkRviHZtvDvId8XSGPu3rmpmSe+wKRcEWNgsfWU=
-github.com/fullsailor/pkcs7 v0.0.0-20190404230743-d7302db945fa/go.mod h1:KnogPXtdwXqoenmZCw6S+25EAm2MkxbG0deNDu4cbSA=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
-github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
-github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
-github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
-github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
-github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/opencontainers/go-digest v1.0.0-rc1 h1:WzifXhOVOEOuFYOJAW6aQqW0TooG2iki3E3Ii+WN7gQ=
 github.com/opencontainers/go-digest v1.0.0-rc1/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQYUd2OVphdqWwCJHrFt2s=
 github.com/opencontainers/image-spec v1.0.1 h1:JMemWkRwHx4Zj+fVxWoMCFm/8sYGGrUVojFA6h/TRcI=
@@ -26,22 +10,16 @@ github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
-github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1 h1:A/5uWzF44DlIgdm/PQFwfMkW0JX+cIcQi/SwLAmZP5M=
+go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1/go.mod h1:SNgMg+EgDFwmvSmLRTNKC5fegJjB7v23qTQ0XLGUNHk=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 h1:HuIa8hRrWRSrqYzx1qI49NNxhdi2PrY7gxVSq1JjLDc=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3 h1:0GoQqolDA55aaLxZyTzK/Y2ePZzZTUrRacwib7cNsYQ=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -49,15 +27,5 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/p
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
-google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0NQvRW8DG4Yk3Q6T9cu9RcFQDu1tc=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
-google.golang.org/grpc v1.24.0 h1:vb/1TCsVn3DcJlQ0Gs1yB1pKI6Do2/QNwxdKqmc/b0s=
-google.golang.org/grpc v1.24.0/go.mod h1:XDChyiUovWa60DnaeDeZmSW86xtLtjtZbwvSiRnRtcA=
 gopkg.in/square/go-jose.v2 v2.3.1 h1:SK5KegNXmKmqE342YYN2qPHEnUYeoMiXXl1poUlI+o4=
 gopkg.in/square/go-jose.v2 v2.3.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
-gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
-gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/vendor/github.com/containers/ocicrypt/gpg.go b/vendor/github.com/containers/ocicrypt/gpg.go
index 44cafae0c..c89f3b0ea 100644
--- a/vendor/github.com/containers/ocicrypt/gpg.go
+++ b/vendor/github.com/containers/ocicrypt/gpg.go
@@ -170,7 +170,7 @@ func (gc *gpgv2Client) getKeyDetails(option string, keyid uint64) ([]byte, bool,
 	var args []string
 
 	if gc.gpgHomeDir != "" {
-		args = append([]string{"--homedir", gc.gpgHomeDir})
+		args = []string{"--homedir", gc.gpgHomeDir}
 	}
 	args = append(args, option, fmt.Sprintf("0x%x", keyid))
 
@@ -229,7 +229,7 @@ func (gc *gpgv1Client) getKeyDetails(option string, keyid uint64) ([]byte, bool,
 	var args []string
 
 	if gc.gpgHomeDir != "" {
-		args = append([]string{"--homedir", gc.gpgHomeDir})
+		args = []string{"--homedir", gc.gpgHomeDir}
 	}
 	args = append(args, option, fmt.Sprintf("0x%x", keyid))
 
diff --git a/vendor/github.com/containers/ocicrypt/keywrap/pkcs7/keywrapper_pkcs7.go b/vendor/github.com/containers/ocicrypt/keywrap/pkcs7/keywrapper_pkcs7.go
index eeba64748..1feae462b 100644
--- a/vendor/github.com/containers/ocicrypt/keywrap/pkcs7/keywrapper_pkcs7.go
+++ b/vendor/github.com/containers/ocicrypt/keywrap/pkcs7/keywrapper_pkcs7.go
@@ -23,8 +23,8 @@ import (
 	"github.com/containers/ocicrypt/config"
 	"github.com/containers/ocicrypt/keywrap"
 	"github.com/containers/ocicrypt/utils"
-	"github.com/fullsailor/pkcs7"
 	"github.com/pkg/errors"
+	"go.mozilla.org/pkcs7"
 )
 
 type pkcs7KeyWrapper struct {
diff --git a/vendor/github.com/fullsailor/pkcs7/.travis.yml b/vendor/github.com/fullsailor/pkcs7/.travis.yml
deleted file mode 100644
index bc1204376..000000000
--- a/vendor/github.com/fullsailor/pkcs7/.travis.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-language: go
-
-go:
-    - 1.8
-    - 1.9
-    - "1.10"
-    - tip
diff --git a/vendor/github.com/fullsailor/pkcs7/README.md b/vendor/github.com/fullsailor/pkcs7/README.md
deleted file mode 100644
index bfd948f32..000000000
--- a/vendor/github.com/fullsailor/pkcs7/README.md
+++ /dev/null
@@ -1,8 +0,0 @@
-# pkcs7
-
-[![GoDoc](https://godoc.org/github.com/fullsailor/pkcs7?status.svg)](https://godoc.org/github.com/fullsailor/pkcs7)
-[![Build Status](https://travis-ci.org/fullsailor/pkcs7.svg?branch=master)](https://travis-ci.org/fullsailor/pkcs7)
-
-pkcs7 implements parsing and creating signed and enveloped messages.
-
-- Documentation on [GoDoc](http://godoc.org/github.com/fullsailor/pkcs7)
diff --git a/vendor/github.com/fullsailor/pkcs7/pkcs7.go b/vendor/github.com/fullsailor/pkcs7/pkcs7.go
deleted file mode 100644
index 0264466b4..000000000
--- a/vendor/github.com/fullsailor/pkcs7/pkcs7.go
+++ /dev/null
@@ -1,962 +0,0 @@
-// Package pkcs7 implements parsing and generation of some PKCS#7 structures.
-package pkcs7
-
-import (
-	"bytes"
-	"crypto"
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/des"
-	"crypto/hmac"
-	"crypto/rand"
-	"crypto/rsa"
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/asn1"
-	"errors"
-	"fmt"
-	"math/big"
-	"sort"
-	"time"
-
-	_ "crypto/sha1" // for crypto.SHA1
-)
-
-// PKCS7 Represents a PKCS7 structure
-type PKCS7 struct {
-	Content      []byte
-	Certificates []*x509.Certificate
-	CRLs         []pkix.CertificateList
-	Signers      []signerInfo
-	raw          interface{}
-}
-
-type contentInfo struct {
-	ContentType asn1.ObjectIdentifier
-	Content     asn1.RawValue `asn1:"explicit,optional,tag:0"`
-}
-
-// ErrUnsupportedContentType is returned when a PKCS7 content is not supported.
-// Currently only Data (1.2.840.113549.1.7.1), Signed Data (1.2.840.113549.1.7.2),
-// and Enveloped Data are supported (1.2.840.113549.1.7.3)
-var ErrUnsupportedContentType = errors.New("pkcs7: cannot parse data: unimplemented content type")
-
-type unsignedData []byte
-
-var (
-	oidData                   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 1}
-	oidSignedData             = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 2}
-	oidEnvelopedData          = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 3}
-	oidSignedAndEnvelopedData = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 4}
-	oidDigestedData           = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 5}
-	oidEncryptedData          = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 6}
-	oidAttributeContentType   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 3}
-	oidAttributeMessageDigest = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 4}
-	oidAttributeSigningTime   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 5}
-)
-
-type signedData struct {
-	Version                    int                        `asn1:"default:1"`
-	DigestAlgorithmIdentifiers []pkix.AlgorithmIdentifier `asn1:"set"`
-	ContentInfo                contentInfo
-	Certificates               rawCertificates        `asn1:"optional,tag:0"`
-	CRLs                       []pkix.CertificateList `asn1:"optional,tag:1"`
-	SignerInfos                []signerInfo           `asn1:"set"`
-}
-
-type rawCertificates struct {
-	Raw asn1.RawContent
-}
-
-type envelopedData struct {
-	Version              int
-	RecipientInfos       []recipientInfo `asn1:"set"`
-	EncryptedContentInfo encryptedContentInfo
-}
-
-type recipientInfo struct {
-	Version                int
-	IssuerAndSerialNumber  issuerAndSerial
-	KeyEncryptionAlgorithm pkix.AlgorithmIdentifier
-	EncryptedKey           []byte
-}
-
-type encryptedContentInfo struct {
-	ContentType                asn1.ObjectIdentifier
-	ContentEncryptionAlgorithm pkix.AlgorithmIdentifier
-	EncryptedContent           asn1.RawValue `asn1:"tag:0,optional"`
-}
-
-type attribute struct {
-	Type  asn1.ObjectIdentifier
-	Value asn1.RawValue `asn1:"set"`
-}
-
-type issuerAndSerial struct {
-	IssuerName   asn1.RawValue
-	SerialNumber *big.Int
-}
-
-// MessageDigestMismatchError is returned when the signer data digest does not
-// match the computed digest for the contained content
-type MessageDigestMismatchError struct {
-	ExpectedDigest []byte
-	ActualDigest   []byte
-}
-
-func (err *MessageDigestMismatchError) Error() string {
-	return fmt.Sprintf("pkcs7: Message digest mismatch\n\tExpected: %X\n\tActual  : %X", err.ExpectedDigest, err.ActualDigest)
-}
-
-type signerInfo struct {
-	Version                   int `asn1:"default:1"`
-	IssuerAndSerialNumber     issuerAndSerial
-	DigestAlgorithm           pkix.AlgorithmIdentifier
-	AuthenticatedAttributes   []attribute `asn1:"optional,tag:0"`
-	DigestEncryptionAlgorithm pkix.AlgorithmIdentifier
-	EncryptedDigest           []byte
-	UnauthenticatedAttributes []attribute `asn1:"optional,tag:1"`
-}
-
-// Parse decodes a DER encoded PKCS7 package
-func Parse(data []byte) (p7 *PKCS7, err error) {
-	if len(data) == 0 {
-		return nil, errors.New("pkcs7: input data is empty")
-	}
-	var info contentInfo
-	der, err := ber2der(data)
-	if err != nil {
-		return nil, err
-	}
-	rest, err := asn1.Unmarshal(der, &info)
-	if len(rest) > 0 {
-		err = asn1.SyntaxError{Msg: "trailing data"}
-		return
-	}
-	if err != nil {
-		return
-	}
-
-	// fmt.Printf("--> Content Type: %s", info.ContentType)
-	switch {
-	case info.ContentType.Equal(oidSignedData):
-		return parseSignedData(info.Content.Bytes)
-	case info.ContentType.Equal(oidEnvelopedData):
-		return parseEnvelopedData(info.Content.Bytes)
-	}
-	return nil, ErrUnsupportedContentType
-}
-
-func parseSignedData(data []byte) (*PKCS7, error) {
-	var sd signedData
-	asn1.Unmarshal(data, &sd)
-	certs, err := sd.Certificates.Parse()
-	if err != nil {
-		return nil, err
-	}
-	// fmt.Printf("--> Signed Data Version %d\n", sd.Version)
-
-	var compound asn1.RawValue
-	var content unsignedData
-
-	// The Content.Bytes maybe empty on PKI responses.
-	if len(sd.ContentInfo.Content.Bytes) > 0 {
-		if _, err := asn1.Unmarshal(sd.ContentInfo.Content.Bytes, &compound); err != nil {
-			return nil, err
-		}
-	}
-	// Compound octet string
-	if compound.IsCompound {
-		if _, err = asn1.Unmarshal(compound.Bytes, &content); err != nil {
-			return nil, err
-		}
-	} else {
-		// assuming this is tag 04
-		content = compound.Bytes
-	}
-	return &PKCS7{
-		Content:      content,
-		Certificates: certs,
-		CRLs:         sd.CRLs,
-		Signers:      sd.SignerInfos,
-		raw:          sd}, nil
-}
-
-func (raw rawCertificates) Parse() ([]*x509.Certificate, error) {
-	if len(raw.Raw) == 0 {
-		return nil, nil
-	}
-
-	var val asn1.RawValue
-	if _, err := asn1.Unmarshal(raw.Raw, &val); err != nil {
-		return nil, err
-	}
-
-	return x509.ParseCertificates(val.Bytes)
-}
-
-func parseEnvelopedData(data []byte) (*PKCS7, error) {
-	var ed envelopedData
-	if _, err := asn1.Unmarshal(data, &ed); err != nil {
-		return nil, err
-	}
-	return &PKCS7{
-		raw: ed,
-	}, nil
-}
-
-// Verify checks the signatures of a PKCS7 object
-// WARNING: Verify does not check signing time or verify certificate chains at
-// this time.
-func (p7 *PKCS7) Verify() (err error) {
-	if len(p7.Signers) == 0 {
-		return errors.New("pkcs7: Message has no signers")
-	}
-	for _, signer := range p7.Signers {
-		if err := verifySignature(p7, signer); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func verifySignature(p7 *PKCS7, signer signerInfo) error {
-	signedData := p7.Content
-	hash, err := getHashForOID(signer.DigestAlgorithm.Algorithm)
-	if err != nil {
-		return err
-	}
-	if len(signer.AuthenticatedAttributes) > 0 {
-		// TODO(fullsailor): First check the content type match
-		var digest []byte
-		err := unmarshalAttribute(signer.AuthenticatedAttributes, oidAttributeMessageDigest, &digest)
-		if err != nil {
-			return err
-		}
-		h := hash.New()
-		h.Write(p7.Content)
-		computed := h.Sum(nil)
-		if !hmac.Equal(digest, computed) {
-			return &MessageDigestMismatchError{
-				ExpectedDigest: digest,
-				ActualDigest:   computed,
-			}
-		}
-		// TODO(fullsailor): Optionally verify certificate chain
-		// TODO(fullsailor): Optionally verify signingTime against certificate NotAfter/NotBefore
-		signedData, err = marshalAttributes(signer.AuthenticatedAttributes)
-		if err != nil {
-			return err
-		}
-	}
-	cert := getCertFromCertsByIssuerAndSerial(p7.Certificates, signer.IssuerAndSerialNumber)
-	if cert == nil {
-		return errors.New("pkcs7: No certificate for signer")
-	}
-
-	algo := getSignatureAlgorithmFromAI(signer.DigestEncryptionAlgorithm)
-	if algo == x509.UnknownSignatureAlgorithm {
-		// I'm not sure what the spec here is, and the openssl sources were not
-		// helpful. But, this is what App Store receipts appear to do.
-		// The DigestEncryptionAlgorithm is just "rsaEncryption (PKCS #1)"
-		// But we're expecting a digest + encryption algorithm. So... we're going
-		// to determine an algorithm based on the DigestAlgorithm and this
-		// encryption algorithm.
-		if signer.DigestEncryptionAlgorithm.Algorithm.Equal(oidEncryptionAlgorithmRSA) {
-			algo = getRSASignatureAlgorithmForDigestAlgorithm(hash)
-		}
-	}
-	return cert.CheckSignature(algo, signedData, signer.EncryptedDigest)
-}
-
-func marshalAttributes(attrs []attribute) ([]byte, error) {
-	encodedAttributes, err := asn1.Marshal(struct {
-		A []attribute `asn1:"set"`
-	}{A: attrs})
-	if err != nil {
-		return nil, err
-	}
-
-	// Remove the leading sequence octets
-	var raw asn1.RawValue
-	asn1.Unmarshal(encodedAttributes, &raw)
-	return raw.Bytes, nil
-}
-
-var (
-	oidDigestAlgorithmSHA1    = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 26}
-	oidEncryptionAlgorithmRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 1}
-)
-
-func getCertFromCertsByIssuerAndSerial(certs []*x509.Certificate, ias issuerAndSerial) *x509.Certificate {
-	for _, cert := range certs {
-		if isCertMatchForIssuerAndSerial(cert, ias) {
-			return cert
-		}
-	}
-	return nil
-}
-
-func getHashForOID(oid asn1.ObjectIdentifier) (crypto.Hash, error) {
-	switch {
-	case oid.Equal(oidDigestAlgorithmSHA1):
-		return crypto.SHA1, nil
-  case oid.Equal(oidSHA256):
-    return crypto.SHA256, nil
-	}
-	return crypto.Hash(0), ErrUnsupportedAlgorithm
-}
-
-func getRSASignatureAlgorithmForDigestAlgorithm(hash crypto.Hash) x509.SignatureAlgorithm {
-	for _, details := range signatureAlgorithmDetails {
-		if details.pubKeyAlgo == x509.RSA && details.hash == hash {
-			return details.algo
-		}
-	}
-	return x509.UnknownSignatureAlgorithm
-}
-
-// GetOnlySigner returns an x509.Certificate for the first signer of the signed
-// data payload. If there are more or less than one signer, nil is returned
-func (p7 *PKCS7) GetOnlySigner() *x509.Certificate {
-	if len(p7.Signers) != 1 {
-		return nil
-	}
-	signer := p7.Signers[0]
-	return getCertFromCertsByIssuerAndSerial(p7.Certificates, signer.IssuerAndSerialNumber)
-}
-
-// ErrUnsupportedAlgorithm tells you when our quick dev assumptions have failed
-var ErrUnsupportedAlgorithm = errors.New("pkcs7: cannot decrypt data: only RSA, DES, DES-EDE3, AES-256-CBC and AES-128-GCM supported")
-
-// ErrNotEncryptedContent is returned when attempting to Decrypt data that is not encrypted data
-var ErrNotEncryptedContent = errors.New("pkcs7: content data is a decryptable data type")
-
-// Decrypt decrypts encrypted content info for recipient cert and private key
-func (p7 *PKCS7) Decrypt(cert *x509.Certificate, pk crypto.PrivateKey) ([]byte, error) {
-	data, ok := p7.raw.(envelopedData)
-	if !ok {
-		return nil, ErrNotEncryptedContent
-	}
-	recipient := selectRecipientForCertificate(data.RecipientInfos, cert)
-	if recipient.EncryptedKey == nil {
-		return nil, errors.New("pkcs7: no enveloped recipient for provided certificate")
-	}
-	if priv := pk.(*rsa.PrivateKey); priv != nil {
-		var contentKey []byte
-		contentKey, err := rsa.DecryptPKCS1v15(rand.Reader, priv, recipient.EncryptedKey)
-		if err != nil {
-			return nil, err
-		}
-		return data.EncryptedContentInfo.decrypt(contentKey)
-	}
-	fmt.Printf("Unsupported Private Key: %v\n", pk)
-	return nil, ErrUnsupportedAlgorithm
-}
-
-var oidEncryptionAlgorithmDESCBC = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 7}
-var oidEncryptionAlgorithmDESEDE3CBC = asn1.ObjectIdentifier{1, 2, 840, 113549, 3, 7}
-var oidEncryptionAlgorithmAES256CBC = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 42}
-var oidEncryptionAlgorithmAES128GCM = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 6}
-var oidEncryptionAlgorithmAES128CBC = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 2}
-
-func (eci encryptedContentInfo) decrypt(key []byte) ([]byte, error) {
-	alg := eci.ContentEncryptionAlgorithm.Algorithm
-	if !alg.Equal(oidEncryptionAlgorithmDESCBC) &&
-		!alg.Equal(oidEncryptionAlgorithmDESEDE3CBC) &&
-		!alg.Equal(oidEncryptionAlgorithmAES256CBC) &&
-		!alg.Equal(oidEncryptionAlgorithmAES128CBC) &&
-		!alg.Equal(oidEncryptionAlgorithmAES128GCM) {
-		fmt.Printf("Unsupported Content Encryption Algorithm: %s\n", alg)
-		return nil, ErrUnsupportedAlgorithm
-	}
-
-	// EncryptedContent can either be constructed of multple OCTET STRINGs
-	// or _be_ a tagged OCTET STRING
-	var cyphertext []byte
-	if eci.EncryptedContent.IsCompound {
-		// Complex case to concat all of the children OCTET STRINGs
-		var buf bytes.Buffer
-		cypherbytes := eci.EncryptedContent.Bytes
-		for {
-			var part []byte
-			cypherbytes, _ = asn1.Unmarshal(cypherbytes, &part)
-			buf.Write(part)
-			if cypherbytes == nil {
-				break
-			}
-		}
-		cyphertext = buf.Bytes()
-	} else {
-		// Simple case, the bytes _are_ the cyphertext
-		cyphertext = eci.EncryptedContent.Bytes
-	}
-
-	var block cipher.Block
-	var err error
-
-	switch {
-	case alg.Equal(oidEncryptionAlgorithmDESCBC):
-		block, err = des.NewCipher(key)
-	case alg.Equal(oidEncryptionAlgorithmDESEDE3CBC):
-		block, err = des.NewTripleDESCipher(key)
-	case alg.Equal(oidEncryptionAlgorithmAES256CBC):
-		fallthrough
-	case alg.Equal(oidEncryptionAlgorithmAES128GCM), alg.Equal(oidEncryptionAlgorithmAES128CBC):
-		block, err = aes.NewCipher(key)
-	}
-
-	if err != nil {
-		return nil, err
-	}
-
-	if alg.Equal(oidEncryptionAlgorithmAES128GCM) {
-		params := aesGCMParameters{}
-		paramBytes := eci.ContentEncryptionAlgorithm.Parameters.Bytes
-
-		_, err := asn1.Unmarshal(paramBytes, &params)
-		if err != nil {
-			return nil, err
-		}
-
-		gcm, err := cipher.NewGCM(block)
-		if err != nil {
-			return nil, err
-		}
-
-		if len(params.Nonce) != gcm.NonceSize() {
-			return nil, errors.New("pkcs7: encryption algorithm parameters are incorrect")
-		}
-		if params.ICVLen != gcm.Overhead() {
-			return nil, errors.New("pkcs7: encryption algorithm parameters are incorrect")
-		}
-
-		plaintext, err := gcm.Open(nil, params.Nonce, cyphertext, nil)
-		if err != nil {
-			return nil, err
-		}
-
-		return plaintext, nil
-	}
-
-	iv := eci.ContentEncryptionAlgorithm.Parameters.Bytes
-	if len(iv) != block.BlockSize() {
-		return nil, errors.New("pkcs7: encryption algorithm parameters are malformed")
-	}
-	mode := cipher.NewCBCDecrypter(block, iv)
-	plaintext := make([]byte, len(cyphertext))
-	mode.CryptBlocks(plaintext, cyphertext)
-	if plaintext, err = unpad(plaintext, mode.BlockSize()); err != nil {
-		return nil, err
-	}
-	return plaintext, nil
-}
-
-func selectRecipientForCertificate(recipients []recipientInfo, cert *x509.Certificate) recipientInfo {
-	for _, recp := range recipients {
-		if isCertMatchForIssuerAndSerial(cert, recp.IssuerAndSerialNumber) {
-			return recp
-		}
-	}
-	return recipientInfo{}
-}
-
-func isCertMatchForIssuerAndSerial(cert *x509.Certificate, ias issuerAndSerial) bool {
-	return cert.SerialNumber.Cmp(ias.SerialNumber) == 0 && bytes.Compare(cert.RawIssuer, ias.IssuerName.FullBytes) == 0
-}
-
-func pad(data []byte, blocklen int) ([]byte, error) {
-	if blocklen < 1 {
-		return nil, fmt.Errorf("invalid blocklen %d", blocklen)
-	}
-	padlen := blocklen - (len(data) % blocklen)
-	if padlen == 0 {
-		padlen = blocklen
-	}
-	pad := bytes.Repeat([]byte{byte(padlen)}, padlen)
-	return append(data, pad...), nil
-}
-
-func unpad(data []byte, blocklen int) ([]byte, error) {
-	if blocklen < 1 {
-		return nil, fmt.Errorf("invalid blocklen %d", blocklen)
-	}
-	if len(data)%blocklen != 0 || len(data) == 0 {
-		return nil, fmt.Errorf("invalid data len %d", len(data))
-	}
-
-	// the last byte is the length of padding
-	padlen := int(data[len(data)-1])
-
-	// check padding integrity, all bytes should be the same
-	pad := data[len(data)-padlen:]
-	for _, padbyte := range pad {
-		if padbyte != byte(padlen) {
-			return nil, errors.New("invalid padding")
-		}
-	}
-
-	return data[:len(data)-padlen], nil
-}
-
-func unmarshalAttribute(attrs []attribute, attributeType asn1.ObjectIdentifier, out interface{}) error {
-	for _, attr := range attrs {
-		if attr.Type.Equal(attributeType) {
-			_, err := asn1.Unmarshal(attr.Value.Bytes, out)
-			return err
-		}
-	}
-	return errors.New("pkcs7: attribute type not in attributes")
-}
-
-// UnmarshalSignedAttribute decodes a single attribute from the signer info
-func (p7 *PKCS7) UnmarshalSignedAttribute(attributeType asn1.ObjectIdentifier, out interface{}) error {
-	sd, ok := p7.raw.(signedData)
-	if !ok {
-		return errors.New("pkcs7: payload is not signedData content")
-	}
-	if len(sd.SignerInfos) < 1 {
-		return errors.New("pkcs7: payload has no signers")
-	}
-	attributes := sd.SignerInfos[0].AuthenticatedAttributes
-	return unmarshalAttribute(attributes, attributeType, out)
-}
-
-// SignedData is an opaque data structure for creating signed data payloads
-type SignedData struct {
-	sd            signedData
-	certs         []*x509.Certificate
-	messageDigest []byte
-}
-
-// Attribute represents a key value pair attribute. Value must be marshalable byte
-// `encoding/asn1`
-type Attribute struct {
-	Type  asn1.ObjectIdentifier
-	Value interface{}
-}
-
-// SignerInfoConfig are optional values to include when adding a signer
-type SignerInfoConfig struct {
-	ExtraSignedAttributes []Attribute
-}
-
-// NewSignedData initializes a SignedData with content
-func NewSignedData(data []byte) (*SignedData, error) {
-	content, err := asn1.Marshal(data)
-	if err != nil {
-		return nil, err
-	}
-	ci := contentInfo{
-		ContentType: oidData,
-		Content:     asn1.RawValue{Class: 2, Tag: 0, Bytes: content, IsCompound: true},
-	}
-	digAlg := pkix.AlgorithmIdentifier{
-		Algorithm: oidDigestAlgorithmSHA1,
-	}
-	h := crypto.SHA1.New()
-	h.Write(data)
-	md := h.Sum(nil)
-	sd := signedData{
-		ContentInfo:                ci,
-		Version:                    1,
-		DigestAlgorithmIdentifiers: []pkix.AlgorithmIdentifier{digAlg},
-	}
-	return &SignedData{sd: sd, messageDigest: md}, nil
-}
-
-type attributes struct {
-	types  []asn1.ObjectIdentifier
-	values []interface{}
-}
-
-// Add adds the attribute, maintaining insertion order
-func (attrs *attributes) Add(attrType asn1.ObjectIdentifier, value interface{}) {
-	attrs.types = append(attrs.types, attrType)
-	attrs.values = append(attrs.values, value)
-}
-
-type sortableAttribute struct {
-	SortKey   []byte
-	Attribute attribute
-}
-
-type attributeSet []sortableAttribute
-
-func (sa attributeSet) Len() int {
-	return len(sa)
-}
-
-func (sa attributeSet) Less(i, j int) bool {
-	return bytes.Compare(sa[i].SortKey, sa[j].SortKey) < 0
-}
-
-func (sa attributeSet) Swap(i, j int) {
-	sa[i], sa[j] = sa[j], sa[i]
-}
-
-func (sa attributeSet) Attributes() []attribute {
-	attrs := make([]attribute, len(sa))
-	for i, attr := range sa {
-		attrs[i] = attr.Attribute
-	}
-	return attrs
-}
-
-func (attrs *attributes) ForMarshaling() ([]attribute, error) {
-	sortables := make(attributeSet, len(attrs.types))
-	for i := range sortables {
-		attrType := attrs.types[i]
-		attrValue := attrs.values[i]
-		asn1Value, err := asn1.Marshal(attrValue)
-		if err != nil {
-			return nil, err
-		}
-		attr := attribute{
-			Type:  attrType,
-			Value: asn1.RawValue{Tag: 17, IsCompound: true, Bytes: asn1Value}, // 17 == SET tag
-		}
-		encoded, err := asn1.Marshal(attr)
-		if err != nil {
-			return nil, err
-		}
-		sortables[i] = sortableAttribute{
-			SortKey:   encoded,
-			Attribute: attr,
-		}
-	}
-	sort.Sort(sortables)
-	return sortables.Attributes(), nil
-}
-
-// AddSigner signs attributes about the content and adds certificate to payload
-func (sd *SignedData) AddSigner(cert *x509.Certificate, pkey crypto.PrivateKey, config SignerInfoConfig) error {
-	attrs := &attributes{}
-	attrs.Add(oidAttributeContentType, sd.sd.ContentInfo.ContentType)
-	attrs.Add(oidAttributeMessageDigest, sd.messageDigest)
-	attrs.Add(oidAttributeSigningTime, time.Now())
-	for _, attr := range config.ExtraSignedAttributes {
-		attrs.Add(attr.Type, attr.Value)
-	}
-	finalAttrs, err := attrs.ForMarshaling()
-	if err != nil {
-		return err
-	}
-	signature, err := signAttributes(finalAttrs, pkey, crypto.SHA1)
-	if err != nil {
-		return err
-	}
-
-	ias, err := cert2issuerAndSerial(cert)
-	if err != nil {
-		return err
-	}
-
-	signer := signerInfo{
-		AuthenticatedAttributes:   finalAttrs,
-		DigestAlgorithm:           pkix.AlgorithmIdentifier{Algorithm: oidDigestAlgorithmSHA1},
-		DigestEncryptionAlgorithm: pkix.AlgorithmIdentifier{Algorithm: oidSignatureSHA1WithRSA},
-		IssuerAndSerialNumber:     ias,
-		EncryptedDigest:           signature,
-		Version:                   1,
-	}
-	// create signature of signed attributes
-	sd.certs = append(sd.certs, cert)
-	sd.sd.SignerInfos = append(sd.sd.SignerInfos, signer)
-	return nil
-}
-
-// AddCertificate adds the certificate to the payload. Useful for parent certificates
-func (sd *SignedData) AddCertificate(cert *x509.Certificate) {
-	sd.certs = append(sd.certs, cert)
-}
-
-// Detach removes content from the signed data struct to make it a detached signature.
-// This must be called right before Finish()
-func (sd *SignedData) Detach() {
-	sd.sd.ContentInfo = contentInfo{ContentType: oidData}
-}
-
-// Finish marshals the content and its signers
-func (sd *SignedData) Finish() ([]byte, error) {
-	sd.sd.Certificates = marshalCertificates(sd.certs)
-	inner, err := asn1.Marshal(sd.sd)
-	if err != nil {
-		return nil, err
-	}
-	outer := contentInfo{
-		ContentType: oidSignedData,
-		Content:     asn1.RawValue{Class: 2, Tag: 0, Bytes: inner, IsCompound: true},
-	}
-	return asn1.Marshal(outer)
-}
-
-func cert2issuerAndSerial(cert *x509.Certificate) (issuerAndSerial, error) {
-	var ias issuerAndSerial
-	// The issuer RDNSequence has to match exactly the sequence in the certificate
-	// We cannot use cert.Issuer.ToRDNSequence() here since it mangles the sequence
-	ias.IssuerName = asn1.RawValue{FullBytes: cert.RawIssuer}
-	ias.SerialNumber = cert.SerialNumber
-
-	return ias, nil
-}
-
-// signs the DER encoded form of the attributes with the private key
-func signAttributes(attrs []attribute, pkey crypto.PrivateKey, hash crypto.Hash) ([]byte, error) {
-	attrBytes, err := marshalAttributes(attrs)
-	if err != nil {
-		return nil, err
-	}
-	h := hash.New()
-	h.Write(attrBytes)
-	hashed := h.Sum(nil)
-	switch priv := pkey.(type) {
-	case *rsa.PrivateKey:
-		return rsa.SignPKCS1v15(rand.Reader, priv, crypto.SHA1, hashed)
-	}
-	return nil, ErrUnsupportedAlgorithm
-}
-
-// concats and wraps the certificates in the RawValue structure
-func marshalCertificates(certs []*x509.Certificate) rawCertificates {
-	var buf bytes.Buffer
-	for _, cert := range certs {
-		buf.Write(cert.Raw)
-	}
-	rawCerts, _ := marshalCertificateBytes(buf.Bytes())
-	return rawCerts
-}
-
-// Even though, the tag & length are stripped out during marshalling the
-// RawContent, we have to encode it into the RawContent. If its missing,
-// then `asn1.Marshal()` will strip out the certificate wrapper instead.
-func marshalCertificateBytes(certs []byte) (rawCertificates, error) {
-	var val = asn1.RawValue{Bytes: certs, Class: 2, Tag: 0, IsCompound: true}
-	b, err := asn1.Marshal(val)
-	if err != nil {
-		return rawCertificates{}, err
-	}
-	return rawCertificates{Raw: b}, nil
-}
-
-// DegenerateCertificate creates a signed data structure containing only the
-// provided certificate or certificate chain.
-func DegenerateCertificate(cert []byte) ([]byte, error) {
-	rawCert, err := marshalCertificateBytes(cert)
-	if err != nil {
-		return nil, err
-	}
-	emptyContent := contentInfo{ContentType: oidData}
-	sd := signedData{
-		Version:      1,
-		ContentInfo:  emptyContent,
-		Certificates: rawCert,
-		CRLs:         []pkix.CertificateList{},
-	}
-	content, err := asn1.Marshal(sd)
-	if err != nil {
-		return nil, err
-	}
-	signedContent := contentInfo{
-		ContentType: oidSignedData,
-		Content:     asn1.RawValue{Class: 2, Tag: 0, Bytes: content, IsCompound: true},
-	}
-	return asn1.Marshal(signedContent)
-}
-
-const (
-	EncryptionAlgorithmDESCBC = iota
-	EncryptionAlgorithmAES128GCM
-)
-
-// ContentEncryptionAlgorithm determines the algorithm used to encrypt the
-// plaintext message. Change the value of this variable to change which
-// algorithm is used in the Encrypt() function.
-var ContentEncryptionAlgorithm = EncryptionAlgorithmDESCBC
-
-// ErrUnsupportedEncryptionAlgorithm is returned when attempting to encrypt
-// content with an unsupported algorithm.
-var ErrUnsupportedEncryptionAlgorithm = errors.New("pkcs7: cannot encrypt content: only DES-CBC and AES-128-GCM supported")
-
-const nonceSize = 12
-
-type aesGCMParameters struct {
-	Nonce  []byte `asn1:"tag:4"`
-	ICVLen int
-}
-
-func encryptAES128GCM(content []byte) ([]byte, *encryptedContentInfo, error) {
-	// Create AES key and nonce
-	key := make([]byte, 16)
-	nonce := make([]byte, nonceSize)
-
-	_, err := rand.Read(key)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	_, err = rand.Read(nonce)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Encrypt content
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	gcm, err := cipher.NewGCM(block)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	ciphertext := gcm.Seal(nil, nonce, content, nil)
-
-	// Prepare ASN.1 Encrypted Content Info
-	paramSeq := aesGCMParameters{
-		Nonce:  nonce,
-		ICVLen: gcm.Overhead(),
-	}
-
-	paramBytes, err := asn1.Marshal(paramSeq)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	eci := encryptedContentInfo{
-		ContentType: oidData,
-		ContentEncryptionAlgorithm: pkix.AlgorithmIdentifier{
-			Algorithm: oidEncryptionAlgorithmAES128GCM,
-			Parameters: asn1.RawValue{
-				Tag:   asn1.TagSequence,
-				Bytes: paramBytes,
-			},
-		},
-		EncryptedContent: marshalEncryptedContent(ciphertext),
-	}
-
-	return key, &eci, nil
-}
-
-func encryptDESCBC(content []byte) ([]byte, *encryptedContentInfo, error) {
-	// Create DES key & CBC IV
-	key := make([]byte, 8)
-	iv := make([]byte, des.BlockSize)
-	_, err := rand.Read(key)
-	if err != nil {
-		return nil, nil, err
-	}
-	_, err = rand.Read(iv)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Encrypt padded content
-	block, err := des.NewCipher(key)
-	if err != nil {
-		return nil, nil, err
-	}
-	mode := cipher.NewCBCEncrypter(block, iv)
-	plaintext, err := pad(content, mode.BlockSize())
-	cyphertext := make([]byte, len(plaintext))
-	mode.CryptBlocks(cyphertext, plaintext)
-
-	// Prepare ASN.1 Encrypted Content Info
-	eci := encryptedContentInfo{
-		ContentType: oidData,
-		ContentEncryptionAlgorithm: pkix.AlgorithmIdentifier{
-			Algorithm:  oidEncryptionAlgorithmDESCBC,
-			Parameters: asn1.RawValue{Tag: 4, Bytes: iv},
-		},
-		EncryptedContent: marshalEncryptedContent(cyphertext),
-	}
-
-	return key, &eci, nil
-}
-
-// Encrypt creates and returns an envelope data PKCS7 structure with encrypted
-// recipient keys for each recipient public key.
-//
-// The algorithm used to perform encryption is determined by the current value
-// of the global ContentEncryptionAlgorithm package variable. By default, the
-// value is EncryptionAlgorithmDESCBC. To use a different algorithm, change the
-// value before calling Encrypt(). For example:
-//
-//     ContentEncryptionAlgorithm = EncryptionAlgorithmAES128GCM
-//
-// TODO(fullsailor): Add support for encrypting content with other algorithms
-func Encrypt(content []byte, recipients []*x509.Certificate) ([]byte, error) {
-	var eci *encryptedContentInfo
-	var key []byte
-	var err error
-
-	// Apply chosen symmetric encryption method
-	switch ContentEncryptionAlgorithm {
-	case EncryptionAlgorithmDESCBC:
-		key, eci, err = encryptDESCBC(content)
-
-	case EncryptionAlgorithmAES128GCM:
-		key, eci, err = encryptAES128GCM(content)
-
-	default:
-		return nil, ErrUnsupportedEncryptionAlgorithm
-	}
-
-	if err != nil {
-		return nil, err
-	}
-
-	// Prepare each recipient's encrypted cipher key
-	recipientInfos := make([]recipientInfo, len(recipients))
-	for i, recipient := range recipients {
-		encrypted, err := encryptKey(key, recipient)
-		if err != nil {
-			return nil, err
-		}
-		ias, err := cert2issuerAndSerial(recipient)
-		if err != nil {
-			return nil, err
-		}
-		info := recipientInfo{
-			Version:               0,
-			IssuerAndSerialNumber: ias,
-			KeyEncryptionAlgorithm: pkix.AlgorithmIdentifier{
-				Algorithm: oidEncryptionAlgorithmRSA,
-			},
-			EncryptedKey: encrypted,
-		}
-		recipientInfos[i] = info
-	}
-
-	// Prepare envelope content
-	envelope := envelopedData{
-		EncryptedContentInfo: *eci,
-		Version:              0,
-		RecipientInfos:       recipientInfos,
-	}
-	innerContent, err := asn1.Marshal(envelope)
-	if err != nil {
-		return nil, err
-	}
-
-	// Prepare outer payload structure
-	wrapper := contentInfo{
-		ContentType: oidEnvelopedData,
-		Content:     asn1.RawValue{Class: 2, Tag: 0, IsCompound: true, Bytes: innerContent},
-	}
-
-	return asn1.Marshal(wrapper)
-}
-
-func marshalEncryptedContent(content []byte) asn1.RawValue {
-	asn1Content, _ := asn1.Marshal(content)
-	return asn1.RawValue{Tag: 0, Class: 2, Bytes: asn1Content, IsCompound: true}
-}
-
-func encryptKey(key []byte, recipient *x509.Certificate) ([]byte, error) {
-	if pub := recipient.PublicKey.(*rsa.PublicKey); pub != nil {
-		return rsa.EncryptPKCS1v15(rand.Reader, pub, key)
-	}
-	return nil, ErrUnsupportedAlgorithm
-}
diff --git a/vendor/github.com/fullsailor/pkcs7/x509.go b/vendor/github.com/fullsailor/pkcs7/x509.go
deleted file mode 100644
index 195fd0e4b..000000000
--- a/vendor/github.com/fullsailor/pkcs7/x509.go
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the go/golang LICENSE file.
-
-package pkcs7
-
-// These are private constants and functions from the crypto/x509 package that
-// are useful when dealing with signatures verified by x509 certificates
-
-import (
-	"bytes"
-	"crypto"
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/asn1"
-)
-
-var (
-	oidSignatureMD2WithRSA      = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 2}
-	oidSignatureMD5WithRSA      = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 4}
-	oidSignatureSHA1WithRSA     = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5}
-	oidSignatureSHA256WithRSA   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 11}
-	oidSignatureSHA384WithRSA   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 12}
-	oidSignatureSHA512WithRSA   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 13}
-	oidSignatureRSAPSS          = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 10}
-	oidSignatureDSAWithSHA1     = asn1.ObjectIdentifier{1, 2, 840, 10040, 4, 3}
-	oidSignatureDSAWithSHA256   = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 3, 2}
-	oidSignatureECDSAWithSHA1   = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 1}
-	oidSignatureECDSAWithSHA256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 2}
-	oidSignatureECDSAWithSHA384 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 3}
-	oidSignatureECDSAWithSHA512 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 4}
-
-	oidSHA256 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 1}
-	oidSHA384 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 2}
-	oidSHA512 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 3}
-
-	oidMGF1 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 8}
-
-	// oidISOSignatureSHA1WithRSA means the same as oidSignatureSHA1WithRSA
-	// but it's specified by ISO. Microsoft's makecert.exe has been known
-	// to produce certificates with this OID.
-	oidISOSignatureSHA1WithRSA = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 29}
-)
-
-var signatureAlgorithmDetails = []struct {
-	algo       x509.SignatureAlgorithm
-	name       string
-	oid        asn1.ObjectIdentifier
-	pubKeyAlgo x509.PublicKeyAlgorithm
-	hash       crypto.Hash
-}{
-	{x509.MD2WithRSA, "MD2-RSA", oidSignatureMD2WithRSA, x509.RSA, crypto.Hash(0) /* no value for MD2 */},
-	{x509.MD5WithRSA, "MD5-RSA", oidSignatureMD5WithRSA, x509.RSA, crypto.MD5},
-	{x509.SHA1WithRSA, "SHA1-RSA", oidSignatureSHA1WithRSA, x509.RSA, crypto.SHA1},
-	{x509.SHA1WithRSA, "SHA1-RSA", oidISOSignatureSHA1WithRSA, x509.RSA, crypto.SHA1},
-	{x509.SHA256WithRSA, "SHA256-RSA", oidSignatureSHA256WithRSA, x509.RSA, crypto.SHA256},
-	{x509.SHA384WithRSA, "SHA384-RSA", oidSignatureSHA384WithRSA, x509.RSA, crypto.SHA384},
-	{x509.SHA512WithRSA, "SHA512-RSA", oidSignatureSHA512WithRSA, x509.RSA, crypto.SHA512},
-	{x509.SHA256WithRSAPSS, "SHA256-RSAPSS", oidSignatureRSAPSS, x509.RSA, crypto.SHA256},
-	{x509.SHA384WithRSAPSS, "SHA384-RSAPSS", oidSignatureRSAPSS, x509.RSA, crypto.SHA384},
-	{x509.SHA512WithRSAPSS, "SHA512-RSAPSS", oidSignatureRSAPSS, x509.RSA, crypto.SHA512},
-	{x509.DSAWithSHA1, "DSA-SHA1", oidSignatureDSAWithSHA1, x509.DSA, crypto.SHA1},
-	{x509.DSAWithSHA256, "DSA-SHA256", oidSignatureDSAWithSHA256, x509.DSA, crypto.SHA256},
-	{x509.ECDSAWithSHA1, "ECDSA-SHA1", oidSignatureECDSAWithSHA1, x509.ECDSA, crypto.SHA1},
-	{x509.ECDSAWithSHA256, "ECDSA-SHA256", oidSignatureECDSAWithSHA256, x509.ECDSA, crypto.SHA256},
-	{x509.ECDSAWithSHA384, "ECDSA-SHA384", oidSignatureECDSAWithSHA384, x509.ECDSA, crypto.SHA384},
-	{x509.ECDSAWithSHA512, "ECDSA-SHA512", oidSignatureECDSAWithSHA512, x509.ECDSA, crypto.SHA512},
-}
-
-// pssParameters reflects the parameters in an AlgorithmIdentifier that
-// specifies RSA PSS. See https://tools.ietf.org/html/rfc3447#appendix-A.2.3
-type pssParameters struct {
-	// The following three fields are not marked as
-	// optional because the default values specify SHA-1,
-	// which is no longer suitable for use in signatures.
-	Hash         pkix.AlgorithmIdentifier `asn1:"explicit,tag:0"`
-	MGF          pkix.AlgorithmIdentifier `asn1:"explicit,tag:1"`
-	SaltLength   int                      `asn1:"explicit,tag:2"`
-	TrailerField int                      `asn1:"optional,explicit,tag:3,default:1"`
-}
-
-// asn1.NullBytes is not available prior to Go 1.9
-var nullBytes = []byte{5, 0}
-
-func getSignatureAlgorithmFromAI(ai pkix.AlgorithmIdentifier) x509.SignatureAlgorithm {
-	if !ai.Algorithm.Equal(oidSignatureRSAPSS) {
-		for _, details := range signatureAlgorithmDetails {
-			if ai.Algorithm.Equal(details.oid) {
-				return details.algo
-			}
-		}
-		return x509.UnknownSignatureAlgorithm
-	}
-
-	// RSA PSS is special because it encodes important parameters
-	// in the Parameters.
-
-	var params pssParameters
-	if _, err := asn1.Unmarshal(ai.Parameters.FullBytes, &params); err != nil {
-		return x509.UnknownSignatureAlgorithm
-	}
-
-	var mgf1HashFunc pkix.AlgorithmIdentifier
-	if _, err := asn1.Unmarshal(params.MGF.Parameters.FullBytes, &mgf1HashFunc); err != nil {
-		return x509.UnknownSignatureAlgorithm
-	}
-
-	// PSS is greatly overburdened with options. This code forces
-	// them into three buckets by requiring that the MGF1 hash
-	// function always match the message hash function (as
-	// recommended in
-	// https://tools.ietf.org/html/rfc3447#section-8.1), that the
-	// salt length matches the hash length, and that the trailer
-	// field has the default value.
-	if !bytes.Equal(params.Hash.Parameters.FullBytes, nullBytes) ||
-		!params.MGF.Algorithm.Equal(oidMGF1) ||
-		!mgf1HashFunc.Algorithm.Equal(params.Hash.Algorithm) ||
-		!bytes.Equal(mgf1HashFunc.Parameters.FullBytes, nullBytes) ||
-		params.TrailerField != 1 {
-		return x509.UnknownSignatureAlgorithm
-	}
-
-	switch {
-	case params.Hash.Algorithm.Equal(oidSHA256) && params.SaltLength == 32:
-		return x509.SHA256WithRSAPSS
-	case params.Hash.Algorithm.Equal(oidSHA384) && params.SaltLength == 48:
-		return x509.SHA384WithRSAPSS
-	case params.Hash.Algorithm.Equal(oidSHA512) && params.SaltLength == 64:
-		return x509.SHA512WithRSAPSS
-	}
-
-	return x509.UnknownSignatureAlgorithm
-}
diff --git a/vendor/github.com/fullsailor/pkcs7/.gitignore b/vendor/go.mozilla.org/pkcs7/.gitignore
index daf913b1b..daf913b1b 100644
--- a/vendor/github.com/fullsailor/pkcs7/.gitignore
+++ b/vendor/go.mozilla.org/pkcs7/.gitignore
diff --git a/vendor/go.mozilla.org/pkcs7/.travis.yml b/vendor/go.mozilla.org/pkcs7/.travis.yml
new file mode 100644
index 000000000..eac4c1762
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/.travis.yml
@@ -0,0 +1,10 @@
+language: go
+go:
+    - "1.11"
+    - "1.12"
+    - "1.13"
+    - tip
+before_install:
+    - make gettools
+script:
+    - make
diff --git a/vendor/github.com/fullsailor/pkcs7/LICENSE b/vendor/go.mozilla.org/pkcs7/LICENSE
index 75f320908..75f320908 100644
--- a/vendor/github.com/fullsailor/pkcs7/LICENSE
+++ b/vendor/go.mozilla.org/pkcs7/LICENSE
diff --git a/vendor/go.mozilla.org/pkcs7/Makefile b/vendor/go.mozilla.org/pkcs7/Makefile
new file mode 100644
index 000000000..47c73b868
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/Makefile
@@ -0,0 +1,20 @@
+all: vet staticcheck test
+
+test:
+	go test -covermode=count -coverprofile=coverage.out .
+
+showcoverage: test
+	go tool cover -html=coverage.out
+
+vet:
+	go vet .
+
+lint:
+	golint .
+
+staticcheck:
+	staticcheck .
+
+gettools:
+	go get -u honnef.co/go/tools/...
+	go get -u golang.org/x/lint/golint
diff --git a/vendor/go.mozilla.org/pkcs7/README.md b/vendor/go.mozilla.org/pkcs7/README.md
new file mode 100644
index 000000000..bf37059c5
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/README.md
@@ -0,0 +1,69 @@
+# pkcs7
+
+[![GoDoc](https://godoc.org/go.mozilla.org/pkcs7?status.svg)](https://godoc.org/go.mozilla.org/pkcs7)
+[![Build Status](https://travis-ci.org/mozilla-services/pkcs7.svg?branch=master)](https://travis-ci.org/mozilla-services/pkcs7)
+
+pkcs7 implements parsing and creating signed and enveloped messages.
+
+```go
+package main
+
+import (
+	"bytes"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"fmt"
+	"os"
+
+    "go.mozilla.org/pkcs7"
+)
+
+func SignAndDetach(content []byte, cert *x509.Certificate, privkey *rsa.PrivateKey) (signed []byte, err error) {
+	toBeSigned, err := NewSignedData(content)
+	if err != nil {
+		err = fmt.Errorf("Cannot initialize signed data: %s", err)
+		return
+	}
+	if err = toBeSigned.AddSigner(cert, privkey, SignerInfoConfig{}); err != nil {
+		err = fmt.Errorf("Cannot add signer: %s", err)
+		return
+	}
+
+	// Detach signature, omit if you want an embedded signature
+	toBeSigned.Detach()
+
+	signed, err = toBeSigned.Finish()
+	if err != nil {
+		err = fmt.Errorf("Cannot finish signing data: %s", err)
+		return
+	}
+
+	// Verify the signature
+	pem.Encode(os.Stdout, &pem.Block{Type: "PKCS7", Bytes: signed})
+	p7, err := pkcs7.Parse(signed)
+	if err != nil {
+		err = fmt.Errorf("Cannot parse our signed data: %s", err)
+		return
+	}
+
+	// since the signature was detached, reattach the content here
+	p7.Content = content
+
+	if bytes.Compare(content, p7.Content) != 0 {
+		err = fmt.Errorf("Our content was not in the parsed data:\n\tExpected: %s\n\tActual: %s", content, p7.Content)
+		return
+	}
+	if err = p7.Verify(); err != nil {
+		err = fmt.Errorf("Cannot verify our signed data: %s", err)
+		return
+	}
+
+	return signed, nil
+}
+```
+
+
+
+## Credits
+This is a fork of [fullsailor/pkcs7](https://github.com/fullsailor/pkcs7)
diff --git a/vendor/github.com/fullsailor/pkcs7/ber.go b/vendor/go.mozilla.org/pkcs7/ber.go
index 89e96d30c..585256739 100644
--- a/vendor/github.com/fullsailor/pkcs7/ber.go
+++ b/vendor/go.mozilla.org/pkcs7/ber.go
@@ -5,7 +5,7 @@ import (
 	"errors"
 )
 
-// var encodeIndent = 0
+var encodeIndent = 0
 
 type asn1Object interface {
 	EncodeTo(writer *bytes.Buffer) error
@@ -18,7 +18,7 @@ type asn1Structured struct {
 
 func (s asn1Structured) EncodeTo(out *bytes.Buffer) error {
 	//fmt.Printf("%s--> tag: % X\n", strings.Repeat("| ", encodeIndent), s.tagBytes)
-	//encodeIndent++
+	encodeIndent++
 	inner := new(bytes.Buffer)
 	for _, obj := range s.content {
 		err := obj.EncodeTo(inner)
@@ -26,7 +26,7 @@ func (s asn1Structured) EncodeTo(out *bytes.Buffer) error {
 			return err
 		}
 	}
-	//encodeIndent--
+	encodeIndent--
 	out.Write(s.tagBytes)
 	encodeLength(out, inner.Len())
 	out.Write(inner.Bytes())
@@ -133,35 +133,49 @@ func encodeLength(out *bytes.Buffer, length int) (err error) {
 }
 
 func readObject(ber []byte, offset int) (asn1Object, int, error) {
-	//fmt.Printf("\n====> Starting readObject at offset: %d\n\n", offset)
+	berLen := len(ber)
+	if offset >= berLen {
+		return nil, 0, errors.New("ber2der: offset is after end of ber data")
+	}
 	tagStart := offset
 	b := ber[offset]
 	offset++
+	if offset >= berLen {
+		return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
+	}
 	tag := b & 0x1F // last 5 bits
 	if tag == 0x1F {
 		tag = 0
 		for ber[offset] >= 0x80 {
 			tag = tag*128 + ber[offset] - 0x80
 			offset++
+			if offset > berLen {
+				return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
+			}
 		}
-		tag = tag*128 + ber[offset] - 0x80
+		// jvehent 20170227: this doesn't appear to be used anywhere...
+		//tag = tag*128 + ber[offset] - 0x80
 		offset++
+		if offset > berLen {
+			return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
+		}
 	}
 	tagEnd := offset
 
 	kind := b & 0x20
-	/*
-		if kind == 0 {
-			fmt.Print("--> Primitive\n")
-		} else {
-			fmt.Print("--> Constructed\n")
-		}
-	*/
+	if kind == 0 {
+		debugprint("--> Primitive\n")
+	} else {
+		debugprint("--> Constructed\n")
+	}
 	// read length
 	var length int
 	l := ber[offset]
 	offset++
-	indefinite := false
+	if offset > berLen {
+		return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
+	}
+	hack := 0
 	if l > 0x80 {
 		numberOfBytes := (int)(l & 0x7F)
 		if numberOfBytes > 4 { // int is only guaranteed to be 32bit
@@ -170,33 +184,42 @@ func readObject(ber []byte, offset int) (asn1Object, int, error) {
 		if numberOfBytes == 4 && (int)(ber[offset]) > 0x7F {
 			return nil, 0, errors.New("ber2der: BER tag length is negative")
 		}
-		if 0x0 == (int)(ber[offset]) {
+		if (int)(ber[offset]) == 0x0 {
 			return nil, 0, errors.New("ber2der: BER tag length has leading zero")
 		}
-		//fmt.Printf("--> (compute length) indicator byte: %x\n", l)
-		//fmt.Printf("--> (compute length) length bytes: % X\n", ber[offset:offset+numberOfBytes])
+		debugprint("--> (compute length) indicator byte: %x\n", l)
+		debugprint("--> (compute length) length bytes: % X\n", ber[offset:offset+numberOfBytes])
 		for i := 0; i < numberOfBytes; i++ {
 			length = length*256 + (int)(ber[offset])
 			offset++
+			if offset > berLen {
+				return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
+			}
 		}
 	} else if l == 0x80 {
-		indefinite = true
+		// find length by searching content
+		markerIndex := bytes.LastIndex(ber[offset:], []byte{0x0, 0x0})
+		if markerIndex == -1 {
+			return nil, 0, errors.New("ber2der: Invalid BER format")
+		}
+		length = markerIndex
+		hack = 2
+		debugprint("--> (compute length) marker found at offset: %d\n", markerIndex+offset)
 	} else {
 		length = (int)(l)
 	}
-
+	if length < 0 {
+		return nil, 0, errors.New("ber2der: invalid negative value found in BER tag length")
+	}
 	//fmt.Printf("--> length        : %d\n", length)
 	contentEnd := offset + length
 	if contentEnd > len(ber) {
 		return nil, 0, errors.New("ber2der: BER tag length is more than available data")
 	}
-	//fmt.Printf("--> content start : %d\n", offset)
-	//fmt.Printf("--> content end   : %d\n", contentEnd)
-	//fmt.Printf("--> content       : % X\n", ber[offset:contentEnd])
+	debugprint("--> content start : %d\n", offset)
+	debugprint("--> content end   : %d\n", contentEnd)
+	debugprint("--> content       : % X\n", ber[offset:contentEnd])
 	var obj asn1Object
-	if indefinite && kind == 0 {
-		return nil, 0, errors.New("ber2der: Indefinite form tag must have constructed encoding")
-	}
 	if kind == 0 {
 		obj = asn1Primitive{
 			tagBytes: ber[tagStart:tagEnd],
@@ -205,25 +228,14 @@ func readObject(ber []byte, offset int) (asn1Object, int, error) {
 		}
 	} else {
 		var subObjects []asn1Object
-		for (offset < contentEnd) || indefinite {
+		for offset < contentEnd {
 			var subObj asn1Object
 			var err error
-			subObj, offset, err = readObject(ber, offset)
+			subObj, offset, err = readObject(ber[:contentEnd], offset)
 			if err != nil {
 				return nil, 0, err
 			}
 			subObjects = append(subObjects, subObj)
-
-			if indefinite {
-				terminated, err := isIndefiniteTermination(ber, offset)
-				if err != nil {
-					return nil, 0, err
-				}
-
-				if terminated {
-					break
-				}
-			}
 		}
 		obj = asn1Structured{
 			tagBytes: ber[tagStart:tagEnd],
@@ -231,18 +243,9 @@ func readObject(ber []byte, offset int) (asn1Object, int, error) {
 		}
 	}
 
-	// Apply indefinite form length with 0x0000 terminator.
-	if indefinite {
-		contentEnd = offset + 2
-	}
-
-	return obj, contentEnd, nil
+	return obj, contentEnd + hack, nil
 }
 
-func isIndefiniteTermination(ber []byte, offset int) (bool, error) {
-	if len(ber) - offset < 2 {
-		return false, errors.New("ber2der: Invalid BER format")
-	}
-
-	return bytes.Index(ber[offset:], []byte{0x0, 0x0}) == 0, nil
+func debugprint(format string, a ...interface{}) {
+	//fmt.Printf(format, a)
 }
diff --git a/vendor/go.mozilla.org/pkcs7/decrypt.go b/vendor/go.mozilla.org/pkcs7/decrypt.go
new file mode 100644
index 000000000..0d088d628
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/decrypt.go
@@ -0,0 +1,177 @@
+package pkcs7
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/des"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/asn1"
+	"errors"
+	"fmt"
+)
+
+// ErrUnsupportedAlgorithm tells you when our quick dev assumptions have failed
+var ErrUnsupportedAlgorithm = errors.New("pkcs7: cannot decrypt data: only RSA, DES, DES-EDE3, AES-256-CBC and AES-128-GCM supported")
+
+// ErrNotEncryptedContent is returned when attempting to Decrypt data that is not encrypted data
+var ErrNotEncryptedContent = errors.New("pkcs7: content data is a decryptable data type")
+
+// Decrypt decrypts encrypted content info for recipient cert and private key
+func (p7 *PKCS7) Decrypt(cert *x509.Certificate, pkey crypto.PrivateKey) ([]byte, error) {
+	data, ok := p7.raw.(envelopedData)
+	if !ok {
+		return nil, ErrNotEncryptedContent
+	}
+	recipient := selectRecipientForCertificate(data.RecipientInfos, cert)
+	if recipient.EncryptedKey == nil {
+		return nil, errors.New("pkcs7: no enveloped recipient for provided certificate")
+	}
+	switch pkey := pkey.(type) {
+	case *rsa.PrivateKey:
+		var contentKey []byte
+		contentKey, err := rsa.DecryptPKCS1v15(rand.Reader, pkey, recipient.EncryptedKey)
+		if err != nil {
+			return nil, err
+		}
+		return data.EncryptedContentInfo.decrypt(contentKey)
+	}
+	return nil, ErrUnsupportedAlgorithm
+}
+
+// DecryptUsingPSK decrypts encrypted data using caller provided
+// pre-shared secret
+func (p7 *PKCS7) DecryptUsingPSK(key []byte) ([]byte, error) {
+	data, ok := p7.raw.(encryptedData)
+	if !ok {
+		return nil, ErrNotEncryptedContent
+	}
+	return data.EncryptedContentInfo.decrypt(key)
+}
+
+func (eci encryptedContentInfo) decrypt(key []byte) ([]byte, error) {
+	alg := eci.ContentEncryptionAlgorithm.Algorithm
+	if !alg.Equal(OIDEncryptionAlgorithmDESCBC) &&
+		!alg.Equal(OIDEncryptionAlgorithmDESEDE3CBC) &&
+		!alg.Equal(OIDEncryptionAlgorithmAES256CBC) &&
+		!alg.Equal(OIDEncryptionAlgorithmAES128CBC) &&
+		!alg.Equal(OIDEncryptionAlgorithmAES128GCM) &&
+		!alg.Equal(OIDEncryptionAlgorithmAES256GCM) {
+		fmt.Printf("Unsupported Content Encryption Algorithm: %s\n", alg)
+		return nil, ErrUnsupportedAlgorithm
+	}
+
+	// EncryptedContent can either be constructed of multple OCTET STRINGs
+	// or _be_ a tagged OCTET STRING
+	var cyphertext []byte
+	if eci.EncryptedContent.IsCompound {
+		// Complex case to concat all of the children OCTET STRINGs
+		var buf bytes.Buffer
+		cypherbytes := eci.EncryptedContent.Bytes
+		for {
+			var part []byte
+			cypherbytes, _ = asn1.Unmarshal(cypherbytes, &part)
+			buf.Write(part)
+			if cypherbytes == nil {
+				break
+			}
+		}
+		cyphertext = buf.Bytes()
+	} else {
+		// Simple case, the bytes _are_ the cyphertext
+		cyphertext = eci.EncryptedContent.Bytes
+	}
+
+	var block cipher.Block
+	var err error
+
+	switch {
+	case alg.Equal(OIDEncryptionAlgorithmDESCBC):
+		block, err = des.NewCipher(key)
+	case alg.Equal(OIDEncryptionAlgorithmDESEDE3CBC):
+		block, err = des.NewTripleDESCipher(key)
+	case alg.Equal(OIDEncryptionAlgorithmAES256CBC), alg.Equal(OIDEncryptionAlgorithmAES256GCM):
+		fallthrough
+	case alg.Equal(OIDEncryptionAlgorithmAES128GCM), alg.Equal(OIDEncryptionAlgorithmAES128CBC):
+		block, err = aes.NewCipher(key)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	if alg.Equal(OIDEncryptionAlgorithmAES128GCM) || alg.Equal(OIDEncryptionAlgorithmAES256GCM) {
+		params := aesGCMParameters{}
+		paramBytes := eci.ContentEncryptionAlgorithm.Parameters.Bytes
+
+		_, err := asn1.Unmarshal(paramBytes, &params)
+		if err != nil {
+			return nil, err
+		}
+
+		gcm, err := cipher.NewGCM(block)
+		if err != nil {
+			return nil, err
+		}
+
+		if len(params.Nonce) != gcm.NonceSize() {
+			return nil, errors.New("pkcs7: encryption algorithm parameters are incorrect")
+		}
+		if params.ICVLen != gcm.Overhead() {
+			return nil, errors.New("pkcs7: encryption algorithm parameters are incorrect")
+		}
+
+		plaintext, err := gcm.Open(nil, params.Nonce, cyphertext, nil)
+		if err != nil {
+			return nil, err
+		}
+
+		return plaintext, nil
+	}
+
+	iv := eci.ContentEncryptionAlgorithm.Parameters.Bytes
+	if len(iv) != block.BlockSize() {
+		return nil, errors.New("pkcs7: encryption algorithm parameters are malformed")
+	}
+	mode := cipher.NewCBCDecrypter(block, iv)
+	plaintext := make([]byte, len(cyphertext))
+	mode.CryptBlocks(plaintext, cyphertext)
+	if plaintext, err = unpad(plaintext, mode.BlockSize()); err != nil {
+		return nil, err
+	}
+	return plaintext, nil
+}
+
+func unpad(data []byte, blocklen int) ([]byte, error) {
+	if blocklen < 1 {
+		return nil, fmt.Errorf("invalid blocklen %d", blocklen)
+	}
+	if len(data)%blocklen != 0 || len(data) == 0 {
+		return nil, fmt.Errorf("invalid data len %d", len(data))
+	}
+
+	// the last byte is the length of padding
+	padlen := int(data[len(data)-1])
+
+	// check padding integrity, all bytes should be the same
+	pad := data[len(data)-padlen:]
+	for _, padbyte := range pad {
+		if padbyte != byte(padlen) {
+			return nil, errors.New("invalid padding")
+		}
+	}
+
+	return data[:len(data)-padlen], nil
+}
+
+func selectRecipientForCertificate(recipients []recipientInfo, cert *x509.Certificate) recipientInfo {
+	for _, recp := range recipients {
+		if isCertMatchForIssuerAndSerial(cert, recp.IssuerAndSerialNumber) {
+			return recp
+		}
+	}
+	return recipientInfo{}
+}
diff --git a/vendor/go.mozilla.org/pkcs7/encrypt.go b/vendor/go.mozilla.org/pkcs7/encrypt.go
new file mode 100644
index 000000000..da57ae643
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/encrypt.go
@@ -0,0 +1,399 @@
+package pkcs7
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/des"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/asn1"
+	"errors"
+	"fmt"
+)
+
+type envelopedData struct {
+	Version              int
+	RecipientInfos       []recipientInfo `asn1:"set"`
+	EncryptedContentInfo encryptedContentInfo
+}
+
+type encryptedData struct {
+	Version              int
+	EncryptedContentInfo encryptedContentInfo
+}
+
+type recipientInfo struct {
+	Version                int
+	IssuerAndSerialNumber  issuerAndSerial
+	KeyEncryptionAlgorithm pkix.AlgorithmIdentifier
+	EncryptedKey           []byte
+}
+
+type encryptedContentInfo struct {
+	ContentType                asn1.ObjectIdentifier
+	ContentEncryptionAlgorithm pkix.AlgorithmIdentifier
+	EncryptedContent           asn1.RawValue `asn1:"tag:0,optional,explicit"`
+}
+
+const (
+	// EncryptionAlgorithmDESCBC is the DES CBC encryption algorithm
+	EncryptionAlgorithmDESCBC = iota
+
+	// EncryptionAlgorithmAES128CBC is the AES 128 bits with CBC encryption algorithm
+	// Avoid this algorithm unless required for interoperability; use AES GCM instead.
+	EncryptionAlgorithmAES128CBC
+
+	// EncryptionAlgorithmAES256CBC is the AES 256 bits with CBC encryption algorithm
+	// Avoid this algorithm unless required for interoperability; use AES GCM instead.
+	EncryptionAlgorithmAES256CBC
+
+	// EncryptionAlgorithmAES128GCM is the AES 128 bits with GCM encryption algorithm
+	EncryptionAlgorithmAES128GCM
+
+	// EncryptionAlgorithmAES256GCM is the AES 256 bits with GCM encryption algorithm
+	EncryptionAlgorithmAES256GCM
+)
+
+// ContentEncryptionAlgorithm determines the algorithm used to encrypt the
+// plaintext message. Change the value of this variable to change which
+// algorithm is used in the Encrypt() function.
+var ContentEncryptionAlgorithm = EncryptionAlgorithmDESCBC
+
+// ErrUnsupportedEncryptionAlgorithm is returned when attempting to encrypt
+// content with an unsupported algorithm.
+var ErrUnsupportedEncryptionAlgorithm = errors.New("pkcs7: cannot encrypt content: only DES-CBC, AES-CBC, and AES-GCM supported")
+
+// ErrPSKNotProvided is returned when attempting to encrypt
+// using a PSK without actually providing the PSK.
+var ErrPSKNotProvided = errors.New("pkcs7: cannot encrypt content: PSK not provided")
+
+const nonceSize = 12
+
+type aesGCMParameters struct {
+	Nonce  []byte `asn1:"tag:4"`
+	ICVLen int
+}
+
+func encryptAESGCM(content []byte, key []byte) ([]byte, *encryptedContentInfo, error) {
+	var keyLen int
+	var algID asn1.ObjectIdentifier
+	switch ContentEncryptionAlgorithm {
+	case EncryptionAlgorithmAES128GCM:
+		keyLen = 16
+		algID = OIDEncryptionAlgorithmAES128GCM
+	case EncryptionAlgorithmAES256GCM:
+		keyLen = 32
+		algID = OIDEncryptionAlgorithmAES256GCM
+	default:
+		return nil, nil, fmt.Errorf("invalid ContentEncryptionAlgorithm in encryptAESGCM: %d", ContentEncryptionAlgorithm)
+	}
+	if key == nil {
+		// Create AES key
+		key = make([]byte, keyLen)
+
+		_, err := rand.Read(key)
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+
+	// Create nonce
+	nonce := make([]byte, nonceSize)
+
+	_, err := rand.Read(nonce)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// Encrypt content
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	ciphertext := gcm.Seal(nil, nonce, content, nil)
+
+	// Prepare ASN.1 Encrypted Content Info
+	paramSeq := aesGCMParameters{
+		Nonce:  nonce,
+		ICVLen: gcm.Overhead(),
+	}
+
+	paramBytes, err := asn1.Marshal(paramSeq)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	eci := encryptedContentInfo{
+		ContentType: OIDData,
+		ContentEncryptionAlgorithm: pkix.AlgorithmIdentifier{
+			Algorithm: algID,
+			Parameters: asn1.RawValue{
+				Tag:   asn1.TagSequence,
+				Bytes: paramBytes,
+			},
+		},
+		EncryptedContent: marshalEncryptedContent(ciphertext),
+	}
+
+	return key, &eci, nil
+}
+
+func encryptDESCBC(content []byte, key []byte) ([]byte, *encryptedContentInfo, error) {
+	if key == nil {
+		// Create DES key
+		key = make([]byte, 8)
+
+		_, err := rand.Read(key)
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+
+	// Create CBC IV
+	iv := make([]byte, des.BlockSize)
+	_, err := rand.Read(iv)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// Encrypt padded content
+	block, err := des.NewCipher(key)
+	if err != nil {
+		return nil, nil, err
+	}
+	mode := cipher.NewCBCEncrypter(block, iv)
+	plaintext, err := pad(content, mode.BlockSize())
+	if err != nil {
+		return nil, nil, err
+	}
+	cyphertext := make([]byte, len(plaintext))
+	mode.CryptBlocks(cyphertext, plaintext)
+
+	// Prepare ASN.1 Encrypted Content Info
+	eci := encryptedContentInfo{
+		ContentType: OIDData,
+		ContentEncryptionAlgorithm: pkix.AlgorithmIdentifier{
+			Algorithm:  OIDEncryptionAlgorithmDESCBC,
+			Parameters: asn1.RawValue{Tag: 4, Bytes: iv},
+		},
+		EncryptedContent: marshalEncryptedContent(cyphertext),
+	}
+
+	return key, &eci, nil
+}
+
+func encryptAESCBC(content []byte, key []byte) ([]byte, *encryptedContentInfo, error) {
+	var keyLen int
+	var algID asn1.ObjectIdentifier
+	switch ContentEncryptionAlgorithm {
+	case EncryptionAlgorithmAES128CBC:
+		keyLen = 16
+		algID = OIDEncryptionAlgorithmAES128CBC
+	case EncryptionAlgorithmAES256CBC:
+		keyLen = 32
+		algID = OIDEncryptionAlgorithmAES256CBC
+	default:
+		return nil, nil, fmt.Errorf("invalid ContentEncryptionAlgorithm in encryptAESCBC: %d", ContentEncryptionAlgorithm)
+	}
+
+	if key == nil {
+		// Create AES key
+		key = make([]byte, keyLen)
+
+		_, err := rand.Read(key)
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+
+	// Create CBC IV
+	iv := make([]byte, aes.BlockSize)
+	_, err := rand.Read(iv)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// Encrypt padded content
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, nil, err
+	}
+	mode := cipher.NewCBCEncrypter(block, iv)
+	plaintext, err := pad(content, mode.BlockSize())
+	if err != nil {
+		return nil, nil, err
+	}
+	cyphertext := make([]byte, len(plaintext))
+	mode.CryptBlocks(cyphertext, plaintext)
+
+	// Prepare ASN.1 Encrypted Content Info
+	eci := encryptedContentInfo{
+		ContentType: OIDData,
+		ContentEncryptionAlgorithm: pkix.AlgorithmIdentifier{
+			Algorithm:  algID,
+			Parameters: asn1.RawValue{Tag: 4, Bytes: iv},
+		},
+		EncryptedContent: marshalEncryptedContent(cyphertext),
+	}
+
+	return key, &eci, nil
+}
+
+// Encrypt creates and returns an envelope data PKCS7 structure with encrypted
+// recipient keys for each recipient public key.
+//
+// The algorithm used to perform encryption is determined by the current value
+// of the global ContentEncryptionAlgorithm package variable. By default, the
+// value is EncryptionAlgorithmDESCBC. To use a different algorithm, change the
+// value before calling Encrypt(). For example:
+//
+//     ContentEncryptionAlgorithm = EncryptionAlgorithmAES128GCM
+//
+// TODO(fullsailor): Add support for encrypting content with other algorithms
+func Encrypt(content []byte, recipients []*x509.Certificate) ([]byte, error) {
+	var eci *encryptedContentInfo
+	var key []byte
+	var err error
+
+	// Apply chosen symmetric encryption method
+	switch ContentEncryptionAlgorithm {
+	case EncryptionAlgorithmDESCBC:
+		key, eci, err = encryptDESCBC(content, nil)
+	case EncryptionAlgorithmAES128CBC:
+		fallthrough
+	case EncryptionAlgorithmAES256CBC:
+		key, eci, err = encryptAESCBC(content, nil)
+	case EncryptionAlgorithmAES128GCM:
+		fallthrough
+	case EncryptionAlgorithmAES256GCM:
+		key, eci, err = encryptAESGCM(content, nil)
+
+	default:
+		return nil, ErrUnsupportedEncryptionAlgorithm
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	// Prepare each recipient's encrypted cipher key
+	recipientInfos := make([]recipientInfo, len(recipients))
+	for i, recipient := range recipients {
+		encrypted, err := encryptKey(key, recipient)
+		if err != nil {
+			return nil, err
+		}
+		ias, err := cert2issuerAndSerial(recipient)
+		if err != nil {
+			return nil, err
+		}
+		info := recipientInfo{
+			Version:               0,
+			IssuerAndSerialNumber: ias,
+			KeyEncryptionAlgorithm: pkix.AlgorithmIdentifier{
+				Algorithm: OIDEncryptionAlgorithmRSA,
+			},
+			EncryptedKey: encrypted,
+		}
+		recipientInfos[i] = info
+	}
+
+	// Prepare envelope content
+	envelope := envelopedData{
+		EncryptedContentInfo: *eci,
+		Version:              0,
+		RecipientInfos:       recipientInfos,
+	}
+	innerContent, err := asn1.Marshal(envelope)
+	if err != nil {
+		return nil, err
+	}
+
+	// Prepare outer payload structure
+	wrapper := contentInfo{
+		ContentType: OIDEnvelopedData,
+		Content:     asn1.RawValue{Class: 2, Tag: 0, IsCompound: true, Bytes: innerContent},
+	}
+
+	return asn1.Marshal(wrapper)
+}
+
+// EncryptUsingPSK creates and returns an encrypted data PKCS7 structure,
+// encrypted using caller provided pre-shared secret.
+func EncryptUsingPSK(content []byte, key []byte) ([]byte, error) {
+	var eci *encryptedContentInfo
+	var err error
+
+	if key == nil {
+		return nil, ErrPSKNotProvided
+	}
+
+	// Apply chosen symmetric encryption method
+	switch ContentEncryptionAlgorithm {
+	case EncryptionAlgorithmDESCBC:
+		_, eci, err = encryptDESCBC(content, key)
+
+	case EncryptionAlgorithmAES128GCM:
+		fallthrough
+	case EncryptionAlgorithmAES256GCM:
+		_, eci, err = encryptAESGCM(content, key)
+
+	default:
+		return nil, ErrUnsupportedEncryptionAlgorithm
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	// Prepare encrypted-data content
+	ed := encryptedData{
+		Version:              0,
+		EncryptedContentInfo: *eci,
+	}
+	innerContent, err := asn1.Marshal(ed)
+	if err != nil {
+		return nil, err
+	}
+
+	// Prepare outer payload structure
+	wrapper := contentInfo{
+		ContentType: OIDEncryptedData,
+		Content:     asn1.RawValue{Class: 2, Tag: 0, IsCompound: true, Bytes: innerContent},
+	}
+
+	return asn1.Marshal(wrapper)
+}
+
+func marshalEncryptedContent(content []byte) asn1.RawValue {
+	asn1Content, _ := asn1.Marshal(content)
+	return asn1.RawValue{Tag: 0, Class: 2, Bytes: asn1Content, IsCompound: true}
+}
+
+func encryptKey(key []byte, recipient *x509.Certificate) ([]byte, error) {
+	if pub := recipient.PublicKey.(*rsa.PublicKey); pub != nil {
+		return rsa.EncryptPKCS1v15(rand.Reader, pub, key)
+	}
+	return nil, ErrUnsupportedAlgorithm
+}
+
+func pad(data []byte, blocklen int) ([]byte, error) {
+	if blocklen < 1 {
+		return nil, fmt.Errorf("invalid blocklen %d", blocklen)
+	}
+	padlen := blocklen - (len(data) % blocklen)
+	if padlen == 0 {
+		padlen = blocklen
+	}
+	pad := bytes.Repeat([]byte{byte(padlen)}, padlen)
+	return append(data, pad...), nil
+}
diff --git a/vendor/go.mozilla.org/pkcs7/go.mod b/vendor/go.mozilla.org/pkcs7/go.mod
new file mode 100644
index 000000000..10ddff325
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/go.mod
@@ -0,0 +1,3 @@
+module go.mozilla.org/pkcs7
+
+go 1.11
diff --git a/vendor/go.mozilla.org/pkcs7/pkcs7.go b/vendor/go.mozilla.org/pkcs7/pkcs7.go
new file mode 100644
index 000000000..ccc6cc6df
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/pkcs7.go
@@ -0,0 +1,291 @@
+// Package pkcs7 implements parsing and generation of some PKCS#7 structures.
+package pkcs7
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/dsa"
+	"crypto/ecdsa"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/asn1"
+	"errors"
+	"fmt"
+	"sort"
+
+	_ "crypto/sha1" // for crypto.SHA1
+)
+
+// PKCS7 Represents a PKCS7 structure
+type PKCS7 struct {
+	Content      []byte
+	Certificates []*x509.Certificate
+	CRLs         []pkix.CertificateList
+	Signers      []signerInfo
+	raw          interface{}
+}
+
+type contentInfo struct {
+	ContentType asn1.ObjectIdentifier
+	Content     asn1.RawValue `asn1:"explicit,optional,tag:0"`
+}
+
+// ErrUnsupportedContentType is returned when a PKCS7 content is not supported.
+// Currently only Data (1.2.840.113549.1.7.1), Signed Data (1.2.840.113549.1.7.2),
+// and Enveloped Data are supported (1.2.840.113549.1.7.3)
+var ErrUnsupportedContentType = errors.New("pkcs7: cannot parse data: unimplemented content type")
+
+type unsignedData []byte
+
+var (
+	// Signed Data OIDs
+	OIDData                   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 1}
+	OIDSignedData             = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 2}
+	OIDEnvelopedData          = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 3}
+	OIDEncryptedData          = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 6}
+	OIDAttributeContentType   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 3}
+	OIDAttributeMessageDigest = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 4}
+	OIDAttributeSigningTime   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 5}
+
+	// Digest Algorithms
+	OIDDigestAlgorithmSHA1   = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 26}
+	OIDDigestAlgorithmSHA256 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 1}
+	OIDDigestAlgorithmSHA384 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 2}
+	OIDDigestAlgorithmSHA512 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 3}
+
+	OIDDigestAlgorithmDSA     = asn1.ObjectIdentifier{1, 2, 840, 10040, 4, 1}
+	OIDDigestAlgorithmDSASHA1 = asn1.ObjectIdentifier{1, 2, 840, 10040, 4, 3}
+
+	OIDDigestAlgorithmECDSASHA1   = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 1}
+	OIDDigestAlgorithmECDSASHA256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 2}
+	OIDDigestAlgorithmECDSASHA384 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 3}
+	OIDDigestAlgorithmECDSASHA512 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 4}
+
+	// Signature Algorithms
+	OIDEncryptionAlgorithmRSA       = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 1}
+	OIDEncryptionAlgorithmRSASHA1   = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5}
+	OIDEncryptionAlgorithmRSASHA256 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 11}
+	OIDEncryptionAlgorithmRSASHA384 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 12}
+	OIDEncryptionAlgorithmRSASHA512 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 13}
+
+	OIDEncryptionAlgorithmECDSAP256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 3, 1, 7}
+	OIDEncryptionAlgorithmECDSAP384 = asn1.ObjectIdentifier{1, 3, 132, 0, 34}
+	OIDEncryptionAlgorithmECDSAP521 = asn1.ObjectIdentifier{1, 3, 132, 0, 35}
+
+	// Encryption Algorithms
+	OIDEncryptionAlgorithmDESCBC     = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 7}
+	OIDEncryptionAlgorithmDESEDE3CBC = asn1.ObjectIdentifier{1, 2, 840, 113549, 3, 7}
+	OIDEncryptionAlgorithmAES256CBC  = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 42}
+	OIDEncryptionAlgorithmAES128GCM  = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 6}
+	OIDEncryptionAlgorithmAES128CBC  = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 2}
+	OIDEncryptionAlgorithmAES256GCM  = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 46}
+)
+
+func getHashForOID(oid asn1.ObjectIdentifier) (crypto.Hash, error) {
+	switch {
+	case oid.Equal(OIDDigestAlgorithmSHA1), oid.Equal(OIDDigestAlgorithmECDSASHA1),
+		oid.Equal(OIDDigestAlgorithmDSA), oid.Equal(OIDDigestAlgorithmDSASHA1),
+		oid.Equal(OIDEncryptionAlgorithmRSA):
+		return crypto.SHA1, nil
+	case oid.Equal(OIDDigestAlgorithmSHA256), oid.Equal(OIDDigestAlgorithmECDSASHA256):
+		return crypto.SHA256, nil
+	case oid.Equal(OIDDigestAlgorithmSHA384), oid.Equal(OIDDigestAlgorithmECDSASHA384):
+		return crypto.SHA384, nil
+	case oid.Equal(OIDDigestAlgorithmSHA512), oid.Equal(OIDDigestAlgorithmECDSASHA512):
+		return crypto.SHA512, nil
+	}
+	return crypto.Hash(0), ErrUnsupportedAlgorithm
+}
+
+// getDigestOIDForSignatureAlgorithm takes an x509.SignatureAlgorithm
+// and returns the corresponding OID digest algorithm
+func getDigestOIDForSignatureAlgorithm(digestAlg x509.SignatureAlgorithm) (asn1.ObjectIdentifier, error) {
+	switch digestAlg {
+	case x509.SHA1WithRSA, x509.ECDSAWithSHA1:
+		return OIDDigestAlgorithmSHA1, nil
+	case x509.SHA256WithRSA, x509.ECDSAWithSHA256:
+		return OIDDigestAlgorithmSHA256, nil
+	case x509.SHA384WithRSA, x509.ECDSAWithSHA384:
+		return OIDDigestAlgorithmSHA384, nil
+	case x509.SHA512WithRSA, x509.ECDSAWithSHA512:
+		return OIDDigestAlgorithmSHA512, nil
+	}
+	return nil, fmt.Errorf("pkcs7: cannot convert hash to oid, unknown hash algorithm")
+}
+
+// getOIDForEncryptionAlgorithm takes the private key type of the signer and
+// the OID of a digest algorithm to return the appropriate signerInfo.DigestEncryptionAlgorithm
+func getOIDForEncryptionAlgorithm(pkey crypto.PrivateKey, OIDDigestAlg asn1.ObjectIdentifier) (asn1.ObjectIdentifier, error) {
+	switch pkey.(type) {
+	case *rsa.PrivateKey:
+		switch {
+		default:
+			return OIDEncryptionAlgorithmRSA, nil
+		case OIDDigestAlg.Equal(OIDEncryptionAlgorithmRSA):
+			return OIDEncryptionAlgorithmRSA, nil
+		case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA1):
+			return OIDEncryptionAlgorithmRSASHA1, nil
+		case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA256):
+			return OIDEncryptionAlgorithmRSASHA256, nil
+		case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA384):
+			return OIDEncryptionAlgorithmRSASHA384, nil
+		case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA512):
+			return OIDEncryptionAlgorithmRSASHA512, nil
+		}
+	case *ecdsa.PrivateKey:
+		switch {
+		case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA1):
+			return OIDDigestAlgorithmECDSASHA1, nil
+		case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA256):
+			return OIDDigestAlgorithmECDSASHA256, nil
+		case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA384):
+			return OIDDigestAlgorithmECDSASHA384, nil
+		case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA512):
+			return OIDDigestAlgorithmECDSASHA512, nil
+		}
+	case *dsa.PrivateKey:
+		return OIDDigestAlgorithmDSA, nil
+	}
+	return nil, fmt.Errorf("pkcs7: cannot convert encryption algorithm to oid, unknown private key type %T", pkey)
+
+}
+
+// Parse decodes a DER encoded PKCS7 package
+func Parse(data []byte) (p7 *PKCS7, err error) {
+	if len(data) == 0 {
+		return nil, errors.New("pkcs7: input data is empty")
+	}
+	var info contentInfo
+	der, err := ber2der(data)
+	if err != nil {
+		return nil, err
+	}
+	rest, err := asn1.Unmarshal(der, &info)
+	if len(rest) > 0 {
+		err = asn1.SyntaxError{Msg: "trailing data"}
+		return
+	}
+	if err != nil {
+		return
+	}
+
+	// fmt.Printf("--> Content Type: %s", info.ContentType)
+	switch {
+	case info.ContentType.Equal(OIDSignedData):
+		return parseSignedData(info.Content.Bytes)
+	case info.ContentType.Equal(OIDEnvelopedData):
+		return parseEnvelopedData(info.Content.Bytes)
+	case info.ContentType.Equal(OIDEncryptedData):
+		return parseEncryptedData(info.Content.Bytes)
+	}
+	return nil, ErrUnsupportedContentType
+}
+
+func parseEnvelopedData(data []byte) (*PKCS7, error) {
+	var ed envelopedData
+	if _, err := asn1.Unmarshal(data, &ed); err != nil {
+		return nil, err
+	}
+	return &PKCS7{
+		raw: ed,
+	}, nil
+}
+
+func parseEncryptedData(data []byte) (*PKCS7, error) {
+	var ed encryptedData
+	if _, err := asn1.Unmarshal(data, &ed); err != nil {
+		return nil, err
+	}
+	return &PKCS7{
+		raw: ed,
+	}, nil
+}
+
+func (raw rawCertificates) Parse() ([]*x509.Certificate, error) {
+	if len(raw.Raw) == 0 {
+		return nil, nil
+	}
+
+	var val asn1.RawValue
+	if _, err := asn1.Unmarshal(raw.Raw, &val); err != nil {
+		return nil, err
+	}
+
+	return x509.ParseCertificates(val.Bytes)
+}
+
+func isCertMatchForIssuerAndSerial(cert *x509.Certificate, ias issuerAndSerial) bool {
+	return cert.SerialNumber.Cmp(ias.SerialNumber) == 0 && bytes.Equal(cert.RawIssuer, ias.IssuerName.FullBytes)
+}
+
+// Attribute represents a key value pair attribute. Value must be marshalable byte
+// `encoding/asn1`
+type Attribute struct {
+	Type  asn1.ObjectIdentifier
+	Value interface{}
+}
+
+type attributes struct {
+	types  []asn1.ObjectIdentifier
+	values []interface{}
+}
+
+// Add adds the attribute, maintaining insertion order
+func (attrs *attributes) Add(attrType asn1.ObjectIdentifier, value interface{}) {
+	attrs.types = append(attrs.types, attrType)
+	attrs.values = append(attrs.values, value)
+}
+
+type sortableAttribute struct {
+	SortKey   []byte
+	Attribute attribute
+}
+
+type attributeSet []sortableAttribute
+
+func (sa attributeSet) Len() int {
+	return len(sa)
+}
+
+func (sa attributeSet) Less(i, j int) bool {
+	return bytes.Compare(sa[i].SortKey, sa[j].SortKey) < 0
+}
+
+func (sa attributeSet) Swap(i, j int) {
+	sa[i], sa[j] = sa[j], sa[i]
+}
+
+func (sa attributeSet) Attributes() []attribute {
+	attrs := make([]attribute, len(sa))
+	for i, attr := range sa {
+		attrs[i] = attr.Attribute
+	}
+	return attrs
+}
+
+func (attrs *attributes) ForMarshalling() ([]attribute, error) {
+	sortables := make(attributeSet, len(attrs.types))
+	for i := range sortables {
+		attrType := attrs.types[i]
+		attrValue := attrs.values[i]
+		asn1Value, err := asn1.Marshal(attrValue)
+		if err != nil {
+			return nil, err
+		}
+		attr := attribute{
+			Type:  attrType,
+			Value: asn1.RawValue{Tag: 17, IsCompound: true, Bytes: asn1Value}, // 17 == SET tag
+		}
+		encoded, err := asn1.Marshal(attr)
+		if err != nil {
+			return nil, err
+		}
+		sortables[i] = sortableAttribute{
+			SortKey:   encoded,
+			Attribute: attr,
+		}
+	}
+	sort.Sort(sortables)
+	return sortables.Attributes(), nil
+}
diff --git a/vendor/go.mozilla.org/pkcs7/sign.go b/vendor/go.mozilla.org/pkcs7/sign.go
new file mode 100644
index 000000000..addd76383
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/sign.go
@@ -0,0 +1,429 @@
+package pkcs7
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/dsa"
+	"crypto/rand"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/asn1"
+	"errors"
+	"fmt"
+	"math/big"
+	"time"
+)
+
+// SignedData is an opaque data structure for creating signed data payloads
+type SignedData struct {
+	sd                  signedData
+	certs               []*x509.Certificate
+	data, messageDigest []byte
+	digestOid           asn1.ObjectIdentifier
+	encryptionOid       asn1.ObjectIdentifier
+}
+
+// NewSignedData takes data and initializes a PKCS7 SignedData struct that is
+// ready to be signed via AddSigner. The digest algorithm is set to SHA1 by default
+// and can be changed by calling SetDigestAlgorithm.
+func NewSignedData(data []byte) (*SignedData, error) {
+	content, err := asn1.Marshal(data)
+	if err != nil {
+		return nil, err
+	}
+	ci := contentInfo{
+		ContentType: OIDData,
+		Content:     asn1.RawValue{Class: 2, Tag: 0, Bytes: content, IsCompound: true},
+	}
+	sd := signedData{
+		ContentInfo: ci,
+		Version:     1,
+	}
+	return &SignedData{sd: sd, data: data, digestOid: OIDDigestAlgorithmSHA1}, nil
+}
+
+// SignerInfoConfig are optional values to include when adding a signer
+type SignerInfoConfig struct {
+	ExtraSignedAttributes   []Attribute
+	ExtraUnsignedAttributes []Attribute
+}
+
+type signedData struct {
+	Version                    int                        `asn1:"default:1"`
+	DigestAlgorithmIdentifiers []pkix.AlgorithmIdentifier `asn1:"set"`
+	ContentInfo                contentInfo
+	Certificates               rawCertificates        `asn1:"optional,tag:0"`
+	CRLs                       []pkix.CertificateList `asn1:"optional,tag:1"`
+	SignerInfos                []signerInfo           `asn1:"set"`
+}
+
+type signerInfo struct {
+	Version                   int `asn1:"default:1"`
+	IssuerAndSerialNumber     issuerAndSerial
+	DigestAlgorithm           pkix.AlgorithmIdentifier
+	AuthenticatedAttributes   []attribute `asn1:"optional,omitempty,tag:0"`
+	DigestEncryptionAlgorithm pkix.AlgorithmIdentifier
+	EncryptedDigest           []byte
+	UnauthenticatedAttributes []attribute `asn1:"optional,omitempty,tag:1"`
+}
+
+type attribute struct {
+	Type  asn1.ObjectIdentifier
+	Value asn1.RawValue `asn1:"set"`
+}
+
+func marshalAttributes(attrs []attribute) ([]byte, error) {
+	encodedAttributes, err := asn1.Marshal(struct {
+		A []attribute `asn1:"set"`
+	}{A: attrs})
+	if err != nil {
+		return nil, err
+	}
+
+	// Remove the leading sequence octets
+	var raw asn1.RawValue
+	asn1.Unmarshal(encodedAttributes, &raw)
+	return raw.Bytes, nil
+}
+
+type rawCertificates struct {
+	Raw asn1.RawContent
+}
+
+type issuerAndSerial struct {
+	IssuerName   asn1.RawValue
+	SerialNumber *big.Int
+}
+
+// SetDigestAlgorithm sets the digest algorithm to be used in the signing process.
+//
+// This should be called before adding signers
+func (sd *SignedData) SetDigestAlgorithm(d asn1.ObjectIdentifier) {
+	sd.digestOid = d
+}
+
+// SetEncryptionAlgorithm sets the encryption algorithm to be used in the signing process.
+//
+// This should be called before adding signers
+func (sd *SignedData) SetEncryptionAlgorithm(d asn1.ObjectIdentifier) {
+	sd.encryptionOid = d
+}
+
+// AddSigner is a wrapper around AddSignerChain() that adds a signer without any parent.
+func (sd *SignedData) AddSigner(ee *x509.Certificate, pkey crypto.PrivateKey, config SignerInfoConfig) error {
+	var parents []*x509.Certificate
+	return sd.AddSignerChain(ee, pkey, parents, config)
+}
+
+// AddSignerChain signs attributes about the content and adds certificates
+// and signers infos to the Signed Data. The certificate and private key
+// of the end-entity signer are used to issue the signature, and any
+// parent of that end-entity that need to be added to the list of
+// certifications can be specified in the parents slice.
+//
+// The signature algorithm used to hash the data is the one of the end-entity
+// certificate.
+func (sd *SignedData) AddSignerChain(ee *x509.Certificate, pkey crypto.PrivateKey, parents []*x509.Certificate, config SignerInfoConfig) error {
+// Following RFC 2315, 9.2 SignerInfo type, the distinguished name of
+// the issuer of the end-entity signer is stored in the issuerAndSerialNumber
+// section of the SignedData.SignerInfo, alongside the serial number of
+// the end-entity.
+	var ias issuerAndSerial
+	ias.SerialNumber = ee.SerialNumber
+	if len(parents) == 0 {
+		// no parent, the issuer is the end-entity cert itself
+		ias.IssuerName = asn1.RawValue{FullBytes: ee.RawIssuer}
+	} else {
+		err := verifyPartialChain(ee, parents)
+		if err != nil {
+			return err
+		}
+		// the first parent is the issuer
+		ias.IssuerName = asn1.RawValue{FullBytes: parents[0].RawSubject}
+	}
+	sd.sd.DigestAlgorithmIdentifiers = append(sd.sd.DigestAlgorithmIdentifiers,
+		pkix.AlgorithmIdentifier{Algorithm: sd.digestOid},
+	)
+	hash, err := getHashForOID(sd.digestOid)
+	if err != nil {
+		return err
+	}
+	h := hash.New()
+	h.Write(sd.data)
+	sd.messageDigest = h.Sum(nil)
+	encryptionOid, err := getOIDForEncryptionAlgorithm(pkey, sd.digestOid)
+	if err != nil {
+		return err
+	}
+	attrs := &attributes{}
+	attrs.Add(OIDAttributeContentType, sd.sd.ContentInfo.ContentType)
+	attrs.Add(OIDAttributeMessageDigest, sd.messageDigest)
+	attrs.Add(OIDAttributeSigningTime, time.Now().UTC())
+	for _, attr := range config.ExtraSignedAttributes {
+		attrs.Add(attr.Type, attr.Value)
+	}
+	finalAttrs, err := attrs.ForMarshalling()
+	if err != nil {
+		return err
+	}
+	unsignedAttrs := &attributes{}
+	for _, attr := range config.ExtraUnsignedAttributes {
+		unsignedAttrs.Add(attr.Type, attr.Value)
+	}
+	finalUnsignedAttrs, err := unsignedAttrs.ForMarshalling()
+	if err != nil {
+		return err
+	}
+	// create signature of signed attributes
+	signature, err := signAttributes(finalAttrs, pkey, hash)
+	if err != nil {
+		return err
+	}
+	signer := signerInfo{
+		AuthenticatedAttributes:   finalAttrs,
+		UnauthenticatedAttributes: finalUnsignedAttrs,
+		DigestAlgorithm:           pkix.AlgorithmIdentifier{Algorithm: sd.digestOid},
+		DigestEncryptionAlgorithm: pkix.AlgorithmIdentifier{Algorithm: encryptionOid},
+		IssuerAndSerialNumber:     ias,
+		EncryptedDigest:           signature,
+		Version:                   1,
+	}
+	sd.certs = append(sd.certs, ee)
+	if len(parents) > 0 {
+		sd.certs = append(sd.certs, parents...)
+	}
+	sd.sd.SignerInfos = append(sd.sd.SignerInfos, signer)
+	return nil
+}
+
+// SignWithoutAttr issues a signature on the content of the pkcs7 SignedData.
+// Unlike AddSigner/AddSignerChain, it calculates the digest on the data alone
+// and does not include any signed attributes like timestamp and so on.
+//
+// This function is needed to sign old Android APKs, something you probably
+// shouldn't do unless you're maintaining backward compatibility for old
+// applications.
+func (sd *SignedData) SignWithoutAttr(ee *x509.Certificate, pkey crypto.PrivateKey, config SignerInfoConfig) error {
+	var signature []byte
+	sd.sd.DigestAlgorithmIdentifiers = append(sd.sd.DigestAlgorithmIdentifiers, pkix.AlgorithmIdentifier{Algorithm: sd.digestOid})
+	hash, err := getHashForOID(sd.digestOid)
+	if err != nil {
+		return err
+	}
+	h := hash.New()
+	h.Write(sd.data)
+	sd.messageDigest = h.Sum(nil)
+	switch pkey := pkey.(type) {
+	case *dsa.PrivateKey:
+		// dsa doesn't implement crypto.Signer so we make a special case
+		// https://github.com/golang/go/issues/27889
+		r, s, err := dsa.Sign(rand.Reader, pkey, sd.messageDigest)
+		if err != nil {
+			return err
+		}
+		signature, err = asn1.Marshal(dsaSignature{r, s})
+		if err != nil {
+			return err
+		}
+	default:
+		key, ok := pkey.(crypto.Signer)
+		if !ok {
+			return errors.New("pkcs7: private key does not implement crypto.Signer")
+		}
+		signature, err = key.Sign(rand.Reader, sd.messageDigest, hash)
+		if err != nil {
+			return err
+		}
+	}
+	var ias issuerAndSerial
+	ias.SerialNumber = ee.SerialNumber
+	// no parent, the issue is the end-entity cert itself
+	ias.IssuerName = asn1.RawValue{FullBytes: ee.RawIssuer}
+	if sd.encryptionOid == nil {
+		// if the encryption algorithm wasn't set by SetEncryptionAlgorithm,
+		// infer it from the digest algorithm
+		sd.encryptionOid, err = getOIDForEncryptionAlgorithm(pkey, sd.digestOid)
+	}
+	if err != nil {
+		return err
+	}
+	signer := signerInfo{
+		DigestAlgorithm:           pkix.AlgorithmIdentifier{Algorithm: sd.digestOid},
+		DigestEncryptionAlgorithm: pkix.AlgorithmIdentifier{Algorithm: sd.encryptionOid},
+		IssuerAndSerialNumber:     ias,
+		EncryptedDigest:           signature,
+		Version:                   1,
+	}
+	// create signature of signed attributes
+	sd.certs = append(sd.certs, ee)
+	sd.sd.SignerInfos = append(sd.sd.SignerInfos, signer)
+	return nil
+}
+
+func (si *signerInfo) SetUnauthenticatedAttributes(extraUnsignedAttrs []Attribute) error {
+	unsignedAttrs := &attributes{}
+	for _, attr := range extraUnsignedAttrs {
+		unsignedAttrs.Add(attr.Type, attr.Value)
+	}
+	finalUnsignedAttrs, err := unsignedAttrs.ForMarshalling()
+	if err != nil {
+		return err
+	}
+
+	si.UnauthenticatedAttributes = finalUnsignedAttrs
+
+	return nil
+}
+
+// AddCertificate adds the certificate to the payload. Useful for parent certificates
+func (sd *SignedData) AddCertificate(cert *x509.Certificate) {
+	sd.certs = append(sd.certs, cert)
+}
+
+// Detach removes content from the signed data struct to make it a detached signature.
+// This must be called right before Finish()
+func (sd *SignedData) Detach() {
+	sd.sd.ContentInfo = contentInfo{ContentType: OIDData}
+}
+
+// GetSignedData returns the private Signed Data
+func (sd *SignedData) GetSignedData() *signedData {
+	return &sd.sd
+}
+
+// Finish marshals the content and its signers
+func (sd *SignedData) Finish() ([]byte, error) {
+	sd.sd.Certificates = marshalCertificates(sd.certs)
+	inner, err := asn1.Marshal(sd.sd)
+	if err != nil {
+		return nil, err
+	}
+	outer := contentInfo{
+		ContentType: OIDSignedData,
+		Content:     asn1.RawValue{Class: 2, Tag: 0, Bytes: inner, IsCompound: true},
+	}
+	return asn1.Marshal(outer)
+}
+
+// RemoveAuthenticatedAttributes removes authenticated attributes from signedData
+// similar to OpenSSL's PKCS7_NOATTR or -noattr flags
+func (sd *SignedData) RemoveAuthenticatedAttributes() {
+	for i := range sd.sd.SignerInfos {
+		sd.sd.SignerInfos[i].AuthenticatedAttributes = nil
+	}
+}
+
+// RemoveUnauthenticatedAttributes removes unauthenticated attributes from signedData
+func (sd *SignedData) RemoveUnauthenticatedAttributes() {
+	for i := range sd.sd.SignerInfos {
+		sd.sd.SignerInfos[i].UnauthenticatedAttributes = nil
+	}
+}
+
+// verifyPartialChain checks that a given cert is issued by the first parent in the list,
+// then continue down the path. It doesn't require the last parent to be a root CA,
+// or to be trusted in any truststore. It simply verifies that the chain provided, albeit
+// partial, makes sense.
+func verifyPartialChain(cert *x509.Certificate, parents []*x509.Certificate) error {
+	if len(parents) == 0 {
+		return fmt.Errorf("pkcs7: zero parents provided to verify the signature of certificate %q", cert.Subject.CommonName)
+	}
+	err := cert.CheckSignatureFrom(parents[0])
+	if err != nil {
+		return fmt.Errorf("pkcs7: certificate signature from parent is invalid: %v", err)
+	}
+	if len(parents) == 1 {
+		// there is no more parent to check, return
+		return nil
+	}
+	return verifyPartialChain(parents[0], parents[1:])
+}
+
+func cert2issuerAndSerial(cert *x509.Certificate) (issuerAndSerial, error) {
+	var ias issuerAndSerial
+	// The issuer RDNSequence has to match exactly the sequence in the certificate
+	// We cannot use cert.Issuer.ToRDNSequence() here since it mangles the sequence
+	ias.IssuerName = asn1.RawValue{FullBytes: cert.RawIssuer}
+	ias.SerialNumber = cert.SerialNumber
+
+	return ias, nil
+}
+
+// signs the DER encoded form of the attributes with the private key
+func signAttributes(attrs []attribute, pkey crypto.PrivateKey, digestAlg crypto.Hash) ([]byte, error) {
+	attrBytes, err := marshalAttributes(attrs)
+	if err != nil {
+		return nil, err
+	}
+	h := digestAlg.New()
+	h.Write(attrBytes)
+	hash := h.Sum(nil)
+
+	// dsa doesn't implement crypto.Signer so we make a special case
+	// https://github.com/golang/go/issues/27889
+	switch pkey := pkey.(type) {
+	case *dsa.PrivateKey:
+		r, s, err := dsa.Sign(rand.Reader, pkey, hash)
+		if err != nil {
+			return nil, err
+		}
+		return asn1.Marshal(dsaSignature{r, s})
+	}
+
+	key, ok := pkey.(crypto.Signer)
+	if !ok {
+		return nil, errors.New("pkcs7: private key does not implement crypto.Signer")
+	}
+	return key.Sign(rand.Reader, hash, digestAlg)
+}
+
+type dsaSignature struct {
+	R, S *big.Int
+}
+
+// concats and wraps the certificates in the RawValue structure
+func marshalCertificates(certs []*x509.Certificate) rawCertificates {
+	var buf bytes.Buffer
+	for _, cert := range certs {
+		buf.Write(cert.Raw)
+	}
+	rawCerts, _ := marshalCertificateBytes(buf.Bytes())
+	return rawCerts
+}
+
+// Even though, the tag & length are stripped out during marshalling the
+// RawContent, we have to encode it into the RawContent. If its missing,
+// then `asn1.Marshal()` will strip out the certificate wrapper instead.
+func marshalCertificateBytes(certs []byte) (rawCertificates, error) {
+	var val = asn1.RawValue{Bytes: certs, Class: 2, Tag: 0, IsCompound: true}
+	b, err := asn1.Marshal(val)
+	if err != nil {
+		return rawCertificates{}, err
+	}
+	return rawCertificates{Raw: b}, nil
+}
+
+// DegenerateCertificate creates a signed data structure containing only the
+// provided certificate or certificate chain.
+func DegenerateCertificate(cert []byte) ([]byte, error) {
+	rawCert, err := marshalCertificateBytes(cert)
+	if err != nil {
+		return nil, err
+	}
+	emptyContent := contentInfo{ContentType: OIDData}
+	sd := signedData{
+		Version:      1,
+		ContentInfo:  emptyContent,
+		Certificates: rawCert,
+		CRLs:         []pkix.CertificateList{},
+	}
+	content, err := asn1.Marshal(sd)
+	if err != nil {
+		return nil, err
+	}
+	signedContent := contentInfo{
+		ContentType: OIDSignedData,
+		Content:     asn1.RawValue{Class: 2, Tag: 0, Bytes: content, IsCompound: true},
+	}
+	return asn1.Marshal(signedContent)
+}
diff --git a/vendor/go.mozilla.org/pkcs7/verify.go b/vendor/go.mozilla.org/pkcs7/verify.go
new file mode 100644
index 000000000..c8ead2362
--- /dev/null
+++ b/vendor/go.mozilla.org/pkcs7/verify.go
@@ -0,0 +1,264 @@
+package pkcs7
+
+import (
+	"crypto/subtle"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/asn1"
+	"errors"
+	"fmt"
+	"time"
+)
+
+// Verify is a wrapper around VerifyWithChain() that initializes an empty
+// trust store, effectively disabling certificate verification when validating
+// a signature.
+func (p7 *PKCS7) Verify() (err error) {
+	return p7.VerifyWithChain(nil)
+}
+
+// VerifyWithChain checks the signatures of a PKCS7 object.
+// If truststore is not nil, it also verifies the chain of trust of the end-entity
+// signer cert to one of the root in the truststore.
+func (p7 *PKCS7) VerifyWithChain(truststore *x509.CertPool) (err error) {
+	if len(p7.Signers) == 0 {
+		return errors.New("pkcs7: Message has no signers")
+	}
+	for _, signer := range p7.Signers {
+		if err := verifySignature(p7, signer, truststore); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func verifySignature(p7 *PKCS7, signer signerInfo, truststore *x509.CertPool) (err error) {
+	signedData := p7.Content
+	ee := getCertFromCertsByIssuerAndSerial(p7.Certificates, signer.IssuerAndSerialNumber)
+	if ee == nil {
+		return errors.New("pkcs7: No certificate for signer")
+	}
+	signingTime := time.Now().UTC()
+	if len(signer.AuthenticatedAttributes) > 0 {
+		// TODO(fullsailor): First check the content type match
+		var digest []byte
+		err := unmarshalAttribute(signer.AuthenticatedAttributes, OIDAttributeMessageDigest, &digest)
+		if err != nil {
+			return err
+		}
+		hash, err := getHashForOID(signer.DigestAlgorithm.Algorithm)
+		if err != nil {
+			return err
+		}
+		h := hash.New()
+		h.Write(p7.Content)
+		computed := h.Sum(nil)
+		if subtle.ConstantTimeCompare(digest, computed) != 1 {
+			return &MessageDigestMismatchError{
+				ExpectedDigest: digest,
+				ActualDigest:   computed,
+			}
+		}
+		signedData, err = marshalAttributes(signer.AuthenticatedAttributes)
+		if err != nil {
+			return err
+		}
+		err = unmarshalAttribute(signer.AuthenticatedAttributes, OIDAttributeSigningTime, &signingTime)
+		if err == nil {
+			// signing time found, performing validity check
+			if signingTime.After(ee.NotAfter) || signingTime.Before(ee.NotBefore) {
+				return fmt.Errorf("pkcs7: signing time %q is outside of certificate validity %q to %q",
+					signingTime.Format(time.RFC3339),
+					ee.NotBefore.Format(time.RFC3339),
+					ee.NotBefore.Format(time.RFC3339))
+			}
+		}
+	}
+	if truststore != nil {
+		_, err = verifyCertChain(ee, p7.Certificates, truststore, signingTime)
+		if err != nil {
+			return err
+		}
+	}
+	sigalg, err := getSignatureAlgorithm(signer.DigestEncryptionAlgorithm, signer.DigestAlgorithm)
+	if err != nil {
+		return err
+	}
+	return ee.CheckSignature(sigalg, signedData, signer.EncryptedDigest)
+}
+
+// GetOnlySigner returns an x509.Certificate for the first signer of the signed
+// data payload. If there are more or less than one signer, nil is returned
+func (p7 *PKCS7) GetOnlySigner() *x509.Certificate {
+	if len(p7.Signers) != 1 {
+		return nil
+	}
+	signer := p7.Signers[0]
+	return getCertFromCertsByIssuerAndSerial(p7.Certificates, signer.IssuerAndSerialNumber)
+}
+
+// UnmarshalSignedAttribute decodes a single attribute from the signer info
+func (p7 *PKCS7) UnmarshalSignedAttribute(attributeType asn1.ObjectIdentifier, out interface{}) error {
+	sd, ok := p7.raw.(signedData)
+	if !ok {
+		return errors.New("pkcs7: payload is not signedData content")
+	}
+	if len(sd.SignerInfos) < 1 {
+		return errors.New("pkcs7: payload has no signers")
+	}
+	attributes := sd.SignerInfos[0].AuthenticatedAttributes
+	return unmarshalAttribute(attributes, attributeType, out)
+}
+
+func parseSignedData(data []byte) (*PKCS7, error) {
+	var sd signedData
+	asn1.Unmarshal(data, &sd)
+	certs, err := sd.Certificates.Parse()
+	if err != nil {
+		return nil, err
+	}
+	// fmt.Printf("--> Signed Data Version %d\n", sd.Version)
+
+	var compound asn1.RawValue
+	var content unsignedData
+
+	// The Content.Bytes maybe empty on PKI responses.
+	if len(sd.ContentInfo.Content.Bytes) > 0 {
+		if _, err := asn1.Unmarshal(sd.ContentInfo.Content.Bytes, &compound); err != nil {
+			return nil, err
+		}
+	}
+	// Compound octet string
+	if compound.IsCompound {
+		if compound.Tag == 4 {
+			if _, err = asn1.Unmarshal(compound.Bytes, &content); err != nil {
+				return nil, err
+			}
+		} else {
+			content = compound.Bytes
+		}
+	} else {
+		// assuming this is tag 04
+		content = compound.Bytes
+	}
+	return &PKCS7{
+		Content:      content,
+		Certificates: certs,
+		CRLs:         sd.CRLs,
+		Signers:      sd.SignerInfos,
+		raw:          sd}, nil
+}
+
+// verifyCertChain takes an end-entity certs, a list of potential intermediates and a
+// truststore, and built all potential chains between the EE and a trusted root.
+//
+// When verifying chains that may have expired, currentTime can be set to a past date
+// to allow the verification to pass. If unset, currentTime is set to the current UTC time.
+func verifyCertChain(ee *x509.Certificate, certs []*x509.Certificate, truststore *x509.CertPool, currentTime time.Time) (chains [][]*x509.Certificate, err error) {
+	intermediates := x509.NewCertPool()
+	for _, intermediate := range certs {
+		intermediates.AddCert(intermediate)
+	}
+	verifyOptions := x509.VerifyOptions{
+		Roots:         truststore,
+		Intermediates: intermediates,
+		KeyUsages:     []x509.ExtKeyUsage{x509.ExtKeyUsageAny},
+		CurrentTime:   currentTime,
+	}
+	chains, err = ee.Verify(verifyOptions)
+	if err != nil {
+		return chains, fmt.Errorf("pkcs7: failed to verify certificate chain: %v", err)
+	}
+	return
+}
+
+// MessageDigestMismatchError is returned when the signer data digest does not
+// match the computed digest for the contained content
+type MessageDigestMismatchError struct {
+	ExpectedDigest []byte
+	ActualDigest   []byte
+}
+
+func (err *MessageDigestMismatchError) Error() string {
+	return fmt.Sprintf("pkcs7: Message digest mismatch\n\tExpected: %X\n\tActual  : %X", err.ExpectedDigest, err.ActualDigest)
+}
+
+func getSignatureAlgorithm(digestEncryption, digest pkix.AlgorithmIdentifier) (x509.SignatureAlgorithm, error) {
+	switch {
+	case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmECDSASHA1):
+		return x509.ECDSAWithSHA1, nil
+	case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmECDSASHA256):
+		return x509.ECDSAWithSHA256, nil
+	case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmECDSASHA384):
+		return x509.ECDSAWithSHA384, nil
+	case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmECDSASHA512):
+		return x509.ECDSAWithSHA512, nil
+	case digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSA),
+		digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSASHA1),
+		digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSASHA256),
+		digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSASHA384),
+		digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSASHA512):
+		switch {
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA1):
+			return x509.SHA1WithRSA, nil
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA256):
+			return x509.SHA256WithRSA, nil
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA384):
+			return x509.SHA384WithRSA, nil
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA512):
+			return x509.SHA512WithRSA, nil
+		default:
+			return -1, fmt.Errorf("pkcs7: unsupported digest %q for encryption algorithm %q",
+				digest.Algorithm.String(), digestEncryption.Algorithm.String())
+		}
+	case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmDSA),
+		digestEncryption.Algorithm.Equal(OIDDigestAlgorithmDSASHA1):
+		switch {
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA1):
+			return x509.DSAWithSHA1, nil
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA256):
+			return x509.DSAWithSHA256, nil
+		default:
+			return -1, fmt.Errorf("pkcs7: unsupported digest %q for encryption algorithm %q",
+				digest.Algorithm.String(), digestEncryption.Algorithm.String())
+		}
+	case digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmECDSAP256),
+		digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmECDSAP384),
+		digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmECDSAP521):
+		switch {
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA1):
+			return x509.ECDSAWithSHA1, nil
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA256):
+			return x509.ECDSAWithSHA256, nil
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA384):
+			return x509.ECDSAWithSHA384, nil
+		case digest.Algorithm.Equal(OIDDigestAlgorithmSHA512):
+			return x509.ECDSAWithSHA512, nil
+		default:
+			return -1, fmt.Errorf("pkcs7: unsupported digest %q for encryption algorithm %q",
+				digest.Algorithm.String(), digestEncryption.Algorithm.String())
+		}
+	default:
+		return -1, fmt.Errorf("pkcs7: unsupported algorithm %q",
+			digestEncryption.Algorithm.String())
+	}
+}
+
+func getCertFromCertsByIssuerAndSerial(certs []*x509.Certificate, ias issuerAndSerial) *x509.Certificate {
+	for _, cert := range certs {
+		if isCertMatchForIssuerAndSerial(cert, ias) {
+			return cert
+		}
+	}
+	return nil
+}
+
+func unmarshalAttribute(attrs []attribute, attributeType asn1.ObjectIdentifier, out interface{}) error {
+	for _, attr := range attrs {
+		if attr.Type.Equal(attributeType) {
+			_, err := asn1.Unmarshal(attr.Value.Bytes, out)
+			return err
+		}
+	}
+	return errors.New("pkcs7: attribute type not in attributes")
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 1c1865e23..ac1e5036c 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -66,7 +66,7 @@ github.com/containernetworking/plugins/pkg/utils/hwaddr
 github.com/containernetworking/plugins/pkg/utils/sysctl
 github.com/containernetworking/plugins/plugins/ipam/host-local/backend
 github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator
-# github.com/containers/buildah v1.15.1-0.20200708111410-d2ea9429455d
+# github.com/containers/buildah v1.15.1-0.20200731151214-29f4d01c621c
 github.com/containers/buildah
 github.com/containers/buildah/bind
 github.com/containers/buildah/chroot
@@ -137,7 +137,7 @@ github.com/containers/image/v5/types
 github.com/containers/image/v5/version
 # github.com/containers/libtrust v0.0.0-20190913040956-14b96171aa3b
 github.com/containers/libtrust
-# github.com/containers/ocicrypt v1.0.2
+# github.com/containers/ocicrypt v1.0.3
 github.com/containers/ocicrypt
 github.com/containers/ocicrypt/blockcipher
 github.com/containers/ocicrypt/config
@@ -279,8 +279,6 @@ github.com/docker/spdystream/spdy
 github.com/fsnotify/fsnotify
 # github.com/fsouza/go-dockerclient v1.6.5
 github.com/fsouza/go-dockerclient
-# github.com/fullsailor/pkcs7 v0.0.0-20190404230743-d7302db945fa
-github.com/fullsailor/pkcs7
 # github.com/ghodss/yaml v1.0.0
 github.com/ghodss/yaml
 # github.com/godbus/dbus/v5 v5.0.3
@@ -554,6 +552,8 @@ github.com/xeipuuv/gojsonreference
 github.com/xeipuuv/gojsonschema
 # go.etcd.io/bbolt v1.3.5
 go.etcd.io/bbolt
+# go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1
+go.mozilla.org/pkcs7
 # go.opencensus.io v0.22.0
 go.opencensus.io
 go.opencensus.io/internal