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images_verify.go
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images_verify.go
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package cli
import (
"fmt"
"os"
cli "github.com/acorn-io/runtime/pkg/cli/builder"
"github.com/acorn-io/runtime/pkg/client"
acornsign "github.com/acorn-io/runtime/pkg/cosign"
"github.com/google/go-containerregistry/pkg/name"
"github.com/pterm/pterm"
"github.com/spf13/cobra"
)
func NewImageVerify(c CommandContext) *cobra.Command {
cmd := cli.Command(&ImageVerify{client: c.ClientFactory}, cobra.Command{
Use: "verify IMAGE_NAME [flags]",
Example: `# Verify using a locally stored public key file
acorn image verify my-image --key ./my-key.pub
# Verify using a public key belonging to a GitHub Identity
acorn image verify my-image --key gh://ibuildthecloud
# Verify using a public key belonging to an Acorn Manager Identity
acorn image verify my-image --key acorn://ibuildthecloud
`,
SilenceUsage: true,
Short: "Verify Image Signatures",
ValidArgsFunction: newCompletion(c.ClientFactory, imagesCompletion(true)).complete,
Args: cobra.ExactArgs(1),
Hidden: true,
})
_ = cmd.MarkFlagFilename("key")
return cmd
}
type ImageVerify struct {
client ClientFactory
Key string `usage:"Key to use for verifying" short:"k" local:"true"`
Annotations map[string]string `usage:"Annotations to check for in the signature" short:"a" local:"true" name:"annotation"`
}
func (a *ImageVerify) Run(cmd *cobra.Command, args []string) error {
if a.Key == "" {
return fmt.Errorf("key is required")
}
imageName := args[0]
c, err := a.client.CreateDefault()
if err != nil {
return err
}
auth, err := getAuthForImage(cmd.Context(), a.client, imageName)
if err != nil {
return err
}
// not failing here, since it could be a local image
ref, _ := name.ParseReference(imageName)
details, err := c.ImageDetails(cmd.Context(), args[0], &client.ImageDetailsOptions{
Auth: auth,
})
if err != nil {
return err
}
targetDigest := ref.Context().Digest(details.AppImage.Digest)
pterm.Info.Printf("Verifying Image %s (digest: %s) using key %s\n", imageName, targetDigest, a.Key)
vOpts := &client.ImageVerifyOptions{
Annotations: a.Annotations,
PublicKey: a.Key,
Auth: auth,
}
// load public key from file (if it is a file, not a remote reference)
if _, err := os.Stat(a.Key); err == nil {
keyFileBytes, err := os.ReadFile(a.Key)
if err != nil {
return err
}
verifiers, err := acornsign.LoadVerifiers(cmd.Context(), string(keyFileBytes), "sha256")
if err != nil {
return err
}
pubkey, err := verifiers[0].PublicKey()
if err != nil {
return err
}
pem, _, err := acornsign.PemEncodeCryptoPublicKey(pubkey)
if err != nil {
return err
}
vOpts.PublicKey = string(pem)
}
_, err = c.ImageVerify(cmd.Context(), imageName, vOpts)
if err == nil {
pterm.Success.Println("Signature verified")
}
return err
}