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package trust
import (
"context"
"fmt"
"os"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/image"
"github.com/docker/cli/cli/trust"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/theupdateframework/notary/client"
"github.com/theupdateframework/notary/tuf/data"
)
type revokeOptions struct {
forceYes bool
}
func newRevokeCommand(dockerCli command.Cli) *cobra.Command {
options := revokeOptions{}
cmd := &cobra.Command{
Use: "revoke [OPTIONS] IMAGE[:TAG]",
Short: "Remove trust for an image",
Args: cli.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
return revokeTrust(dockerCli, args[0], options)
},
}
flags := cmd.Flags()
flags.BoolVarP(&options.forceYes, "yes", "y", false, "Do not prompt for confirmation")
return cmd
}
func revokeTrust(cli command.Cli, remote string, options revokeOptions) error {
ctx := context.Background()
imgRefAndAuth, err := trust.GetImageReferencesAndAuth(ctx, nil, image.AuthResolver(cli), remote)
if err != nil {
return err
}
tag := imgRefAndAuth.Tag()
if imgRefAndAuth.Tag() == "" && imgRefAndAuth.Digest() != "" {
return fmt.Errorf("cannot use a digest reference for IMAGE:TAG")
}
if imgRefAndAuth.Tag() == "" && !options.forceYes {
deleteRemote := command.PromptForConfirmation(os.Stdin, cli.Out(), fmt.Sprintf("Please confirm you would like to delete all signature data for %s?", remote))
if !deleteRemote {
fmt.Fprintf(cli.Out(), "\nAborting action.\n")
return nil
}
}
notaryRepo, err := cli.NotaryClient(imgRefAndAuth, trust.ActionsPushAndPull)
if err != nil {
return err
}
if err = clearChangeList(notaryRepo); err != nil {
return err
}
defer clearChangeList(notaryRepo)
if err := revokeSignature(notaryRepo, tag); err != nil {
return errors.Wrapf(err, "could not remove signature for %s", remote)
}
fmt.Fprintf(cli.Out(), "Successfully deleted signature for %s\n", remote)
return nil
}
func revokeSignature(notaryRepo client.Repository, tag string) error {
if tag != "" {
// Revoke signature for the specified tag
if err := revokeSingleSig(notaryRepo, tag); err != nil {
return err
}
} else {
// revoke all signatures for the image, as no tag was given
if err := revokeAllSigs(notaryRepo); err != nil {
return err
}
}
// Publish change
return notaryRepo.Publish()
}
func revokeSingleSig(notaryRepo client.Repository, tag string) error {
releasedTargetWithRole, err := notaryRepo.GetTargetByName(tag, trust.ReleasesRole, data.CanonicalTargetsRole)
if err != nil {
return err
}
releasedTarget := releasedTargetWithRole.Target
return getSignableRolesForTargetAndRemove(releasedTarget, notaryRepo)
}
func revokeAllSigs(notaryRepo client.Repository) error {
releasedTargetWithRoleList, err := notaryRepo.ListTargets(trust.ReleasesRole, data.CanonicalTargetsRole)
if err != nil {
return err
}
if len(releasedTargetWithRoleList) == 0 {
return fmt.Errorf("no signed tags to remove")
}
// we need all the roles that signed each released target so we can remove from all roles.
for _, releasedTargetWithRole := range releasedTargetWithRoleList {
// remove from all roles
if err := getSignableRolesForTargetAndRemove(releasedTargetWithRole.Target, notaryRepo); err != nil {
return err
}
}
return nil
}
// get all the roles that signed the target and removes it from all roles.
func getSignableRolesForTargetAndRemove(releasedTarget client.Target, notaryRepo client.Repository) error {
signableRoles, err := trust.GetSignableRoles(notaryRepo, &releasedTarget)
if err != nil {
return err
}
// remove from all roles
return notaryRepo.RemoveTarget(releasedTarget.Name, signableRoles...)
}
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