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authorDaniel J Walsh <dwalsh@redhat.com>2018-03-30 05:49:37 -0400
committerAtomic Bot <atomic-devel@projectatomic.io>2018-04-03 14:48:52 +0000
commit838df4eec4496868e772d5708e00f38bad478718 (patch)
tree89e72bb0b9668ff4005156d590465602589ec4c3 /vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go
parentf41dc0b2580ae83129264edbe45b92231bd119a2 (diff)
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Vendor in latest containers/image
Some more features. docker-archive generates docker legacy compatible images Do not create $DiffID subdirectories for layers with no configs Ensure the layer IDs in legacy docker/tarfile metadata are unique docker-archive: repeated layers are symlinked in the tar file sysregistries: remove all trailing slashes Improve docker/* error messages Fix failure to make auth directory Create a new slice in Schema1.UpdateLayerInfos Drop unused storageImageDestination.{image,systemContext} Load a *storage.Image only once in storageImageSource Support gzip for docker-archive files Remove .tar extension from blob and config file names ostree, src: support copy of compressed layers ostree: re-pull layer if it misses uncompressed_digest|uncompressed_size image: fix docker schema v1 -> OCI conversion Add /etc/containers/certs.d as default certs directory Signed-off-by: Daniel J Walsh <dwalsh@redhat.com> Closes: #569 Approved by: mheon
Diffstat (limited to 'vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go')
-rw-r--r--vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go196
1 files changed, 0 insertions, 196 deletions
diff --git a/vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go b/vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go
deleted file mode 100644
index 126b85ce2..000000000
--- a/vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go
+++ /dev/null
@@ -1,196 +0,0 @@
-/*-
- * Copyright 2014 Square Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package josecipher
-
-import (
- "bytes"
- "crypto/cipher"
- "crypto/hmac"
- "crypto/sha256"
- "crypto/sha512"
- "crypto/subtle"
- "encoding/binary"
- "errors"
- "hash"
-)
-
-const (
- nonceBytes = 16
-)
-
-// NewCBCHMAC instantiates a new AEAD based on CBC+HMAC.
-func NewCBCHMAC(key []byte, newBlockCipher func([]byte) (cipher.Block, error)) (cipher.AEAD, error) {
- keySize := len(key) / 2
- integrityKey := key[:keySize]
- encryptionKey := key[keySize:]
-
- blockCipher, err := newBlockCipher(encryptionKey)
- if err != nil {
- return nil, err
- }
-
- var hash func() hash.Hash
- switch keySize {
- case 16:
- hash = sha256.New
- case 24:
- hash = sha512.New384
- case 32:
- hash = sha512.New
- }
-
- return &cbcAEAD{
- hash: hash,
- blockCipher: blockCipher,
- authtagBytes: keySize,
- integrityKey: integrityKey,
- }, nil
-}
-
-// An AEAD based on CBC+HMAC
-type cbcAEAD struct {
- hash func() hash.Hash
- authtagBytes int
- integrityKey []byte
- blockCipher cipher.Block
-}
-
-func (ctx *cbcAEAD) NonceSize() int {
- return nonceBytes
-}
-
-func (ctx *cbcAEAD) Overhead() int {
- // Maximum overhead is block size (for padding) plus auth tag length, where
- // the length of the auth tag is equivalent to the key size.
- return ctx.blockCipher.BlockSize() + ctx.authtagBytes
-}
-
-// Seal encrypts and authenticates the plaintext.
-func (ctx *cbcAEAD) Seal(dst, nonce, plaintext, data []byte) []byte {
- // Output buffer -- must take care not to mangle plaintext input.
- ciphertext := make([]byte, uint64(len(plaintext))+uint64(ctx.Overhead()))[:len(plaintext)]
- copy(ciphertext, plaintext)
- ciphertext = padBuffer(ciphertext, ctx.blockCipher.BlockSize())
-
- cbc := cipher.NewCBCEncrypter(ctx.blockCipher, nonce)
-
- cbc.CryptBlocks(ciphertext, ciphertext)
- authtag := ctx.computeAuthTag(data, nonce, ciphertext)
-
- ret, out := resize(dst, uint64(len(dst))+uint64(len(ciphertext))+uint64(len(authtag)))
- copy(out, ciphertext)
- copy(out[len(ciphertext):], authtag)
-
- return ret
-}
-
-// Open decrypts and authenticates the ciphertext.
-func (ctx *cbcAEAD) Open(dst, nonce, ciphertext, data []byte) ([]byte, error) {
- if len(ciphertext) < ctx.authtagBytes {
- return nil, errors.New("square/go-jose: invalid ciphertext (too short)")
- }
-
- offset := len(ciphertext) - ctx.authtagBytes
- expectedTag := ctx.computeAuthTag(data, nonce, ciphertext[:offset])
- match := subtle.ConstantTimeCompare(expectedTag, ciphertext[offset:])
- if match != 1 {
- return nil, errors.New("square/go-jose: invalid ciphertext (auth tag mismatch)")
- }
-
- cbc := cipher.NewCBCDecrypter(ctx.blockCipher, nonce)
-
- // Make copy of ciphertext buffer, don't want to modify in place
- buffer := append([]byte{}, []byte(ciphertext[:offset])...)
-
- if len(buffer)%ctx.blockCipher.BlockSize() > 0 {
- return nil, errors.New("square/go-jose: invalid ciphertext (invalid length)")
- }
-
- cbc.CryptBlocks(buffer, buffer)
-
- // Remove padding
- plaintext, err := unpadBuffer(buffer, ctx.blockCipher.BlockSize())
- if err != nil {
- return nil, err
- }
-
- ret, out := resize(dst, uint64(len(dst))+uint64(len(plaintext)))
- copy(out, plaintext)
-
- return ret, nil
-}
-
-// Compute an authentication tag
-func (ctx *cbcAEAD) computeAuthTag(aad, nonce, ciphertext []byte) []byte {
- buffer := make([]byte, uint64(len(aad))+uint64(len(nonce))+uint64(len(ciphertext))+8)
- n := 0
- n += copy(buffer, aad)
- n += copy(buffer[n:], nonce)
- n += copy(buffer[n:], ciphertext)
- binary.BigEndian.PutUint64(buffer[n:], uint64(len(aad))*8)
-
- // According to documentation, Write() on hash.Hash never fails.
- hmac := hmac.New(ctx.hash, ctx.integrityKey)
- _, _ = hmac.Write(buffer)
-
- return hmac.Sum(nil)[:ctx.authtagBytes]
-}
-
-// resize ensures the the given slice has a capacity of at least n bytes.
-// If the capacity of the slice is less than n, a new slice is allocated
-// and the existing data will be copied.
-func resize(in []byte, n uint64) (head, tail []byte) {
- if uint64(cap(in)) >= n {
- head = in[:n]
- } else {
- head = make([]byte, n)
- copy(head, in)
- }
-
- tail = head[len(in):]
- return
-}
-
-// Apply padding
-func padBuffer(buffer []byte, blockSize int) []byte {
- missing := blockSize - (len(buffer) % blockSize)
- ret, out := resize(buffer, uint64(len(buffer))+uint64(missing))
- padding := bytes.Repeat([]byte{byte(missing)}, missing)
- copy(out, padding)
- return ret
-}
-
-// Remove padding
-func unpadBuffer(buffer []byte, blockSize int) ([]byte, error) {
- if len(buffer)%blockSize != 0 {
- return nil, errors.New("square/go-jose: invalid padding")
- }
-
- last := buffer[len(buffer)-1]
- count := int(last)
-
- if count == 0 || count > blockSize || count > len(buffer) {
- return nil, errors.New("square/go-jose: invalid padding")
- }
-
- padding := bytes.Repeat([]byte{last}, count)
- if !bytes.HasSuffix(buffer, padding) {
- return nil, errors.New("square/go-jose: invalid padding")
- }
-
- return buffer[:len(buffer)-count], nil
-}