Support podman image trust command

Display the trust policy of the host system. The trust policy is stored in the /etc/containers/policy.json file and defines a scope of registries or repositories.

Signed-off-by: Qi Wang <qiwan@redhat.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/libpod/image/utils.go b/libpod/image/utils.go
index 9a75ca6dc..b944de1bb 100644
--- a/libpod/image/utils.go
+++ b/libpod/image/utils.go
@@ -2,6 +2,8 @@ package image
 
 import (
 	"io"
+	"net/url"
+	"regexp"
 	"strings"
 
 	cp "github.com/containers/image/copy"
@@ -117,3 +119,23 @@ func GetAdditionalTags(images []string) ([]reference.NamedTagged, error) {
 	}
 	return allTags, nil
 }
+
+// IsValidImageURI checks if image name has valid format
+func IsValidImageURI(imguri string) (bool, error) {
+	uri := "http://" + imguri
+	u, err := url.Parse(uri)
+	if err != nil {
+		return false, errors.Wrapf(err, "invalid image uri: %s", imguri)
+	}
+	reg := regexp.MustCompile(`^[a-zA-Z0-9-_\.]+\/?:?[0-9]*[a-z0-9-\/:]*$`)
+	ret := reg.FindAllString(u.Host, -1)
+	if len(ret) == 0 {
+		return false, errors.Wrapf(err, "invalid image uri: %s", imguri)
+	}
+	reg = regexp.MustCompile(`^[a-z0-9-:\./]*$`)
+	ret = reg.FindAllString(u.Fragment, -1)
+	if len(ret) == 0 {
+		return false, errors.Wrapf(err, "invalid image uri: %s", imguri)
+	}
+	return true, nil
+}