Verify a signature on the supplied container image
Verify signature and annotations on an image by checking the claims against the transparency log.
cosign verify [flags]
cosign verify --key <key path>|<key url>|<kms uri> <image uri> [<image uri> ...]
# verify cosign claims and signing certificates on the image
cosign verify <IMAGE>
# verify multiple images
cosign verify <IMAGE_1> <IMAGE_2> ...
# additionally verify specified annotations
cosign verify -a key1=val1 -a key2=val2 <IMAGE>
# (experimental) additionally, verify with the transparency log
COSIGN_EXPERIMENTAL=1 cosign verify <IMAGE>
# verify image with an on-disk public key
cosign verify --key cosign.pub <IMAGE>
# verify image with an on-disk public key, manually specifying the
# signature digest algorithm
cosign verify --key cosign.pub --signature-digest-algorithm sha512 <IMAGE>
# verify image with an on-disk signed image from 'cosign save'
cosign verify --key cosign.pub --local-image <PATH>
# verify image with local certificate and certificate chain
cosign verify --cert cosign.crt --cert-chain chain.crt <IMAGE>
# verify image with public key provided by URL
cosign verify --key https://host.for/[FILE] <IMAGE>
# verify image with a key stored in an environment variable
cosign verify --key env://[ENV_VAR] <IMAGE>
# verify image with public key stored in Google Cloud KMS
cosign verify --key gcpkms://projects/[PROJECT]/locations/global/keyRings/[KEYRING]/cryptoKeys/[KEY] <IMAGE>
# verify image with public key stored in Hashicorp Vault
cosign verify --key hashivault://[KEY] <IMAGE>
# verify image with public key stored in a Kubernetes secret
cosign verify --key k8s://[NAMESPACE]/[KEY] <IMAGE>
# verify image with public key stored in GitLab with project name
cosign verify --key gitlab://[OWNER]/[PROJECT_NAME] <IMAGE>
# verify image with public key stored in GitLab with project id
cosign verify --key gitlab://[PROJECT_ID] <IMAGE>
--allow-insecure-registry whether to allow insecure connections to registries. Don't use this for anything but testing
-a, --annotations strings extra key=value pairs to sign
--attachment string related image attachment to sign (sbom), default none
--attachment-tag-prefix [AttachmentTagPrefix]sha256-[TargetImageDigest].[AttachmentName] optional custom prefix to use for attached image tags. Attachment images are tagged as: [AttachmentTagPrefix]sha256-[TargetImageDigest].[AttachmentName]
--certificate string path to the public certificate
--certificate-chain string path to a list of CA certificates in PEM format which will be needed when building the certificate chain for the signing certificate. Must start with the parent intermediate CA certificate of the signing certificate and end with the root certificate
--certificate-email string the email expected in a valid Fulcio certificate
--certificate-oidc-issuer string the OIDC issuer expected in a valid Fulcio certificate, e.g. https://token.actions.githubusercontent.com or https://oauth2.sigstore.dev/auth
--check-claims whether to check the claims found (default true)
--enforce-sct whether to enforce that a certificate contain an embedded SCT, a proof of inclusion in a certificate transparency log
-h, --help help for verify
--k8s-keychain whether to use the kubernetes keychain instead of the default keychain (supports workload identity).
--key string path to the public key file, KMS URI or Kubernetes Secret
--local-image whether the specified image is a path to an image saved locally via 'cosign save'
-o, --output string output format for the signing image information (json|text) (default "json")
--rekor-url string [EXPERIMENTAL] address of rekor STL server (default "https://rekor.sigstore.dev")
--signature string signature content or path or remote URL
--signature-digest-algorithm string digest algorithm to use when processing a signature (sha224|sha256|sha384|sha512) (default "sha256")
--sk whether to use a hardware security key
--slot string security key slot to use for generated key (default: signature) (authentication|signature|card-authentication|key-management)
--output-file string log output to a file
-t, --timeout duration timeout for commands (default 3m0s)
-d, --verbose log debug output
-y, --yes skip confirmation prompts
- cosign - A tool for Container Signing, Verification and Storage in an OCI registry.