Verify a signature on the supplied blob
Verify a signature on the supplied blob input using the specified key reference. You may specify either a key, a certificate or a kms reference to verify against. If you use a key or a certificate, you must specify the path to them on disk.
The signature may be specified as a path to a file or a base64 encoded string. The blob may be specified as a path to a file or - for stdin.
cosign verify-blob [flags]
cosign verify-blob (--key <key path>|<key url>|<kms uri>)|(--certificate <cert>) --signature <sig> <blob>
# Verify a simple blob and message
cosign verify-blob --key cosign.pub (--signature <sig path>|<sig url> msg)
# Verify a signature with certificate and CA certificate chain
cosign verify-blob --certificate cert.pem --certificate-chain certchain.pem --signature $sig <blob>
# Verify a signature with CA roots and optional intermediate certificates
cosign verify-blob --certificate cert.pem --ca-roots caroots.pem [--ca-intermediates caintermediates.pem] --signature $sig <blob>
# Verify a signature from an environment variable
cosign verify-blob --key cosign.pub --signature $sig msg
# verify a signature with public key provided by URL
cosign verify-blob --key https://host.for/<FILE> --signature $sig msg
# verify a signature with signature and key provided by URL
cosign verify-blob --key https://host.for/<FILE> --signature https://example.com/<SIG>
# Verify a signature against Azure Key Vault
cosign verify-blob --key azurekms://[VAULT_NAME][VAULT_URI]/[KEY] --signature $sig <blob>
# Verify a signature against AWS KMS
cosign verify-blob --key awskms://[ENDPOINT]/[ID/ALIAS/ARN] --signature $sig <blob>
# Verify a signature against Google Cloud KMS
cosign verify-blob --key gcpkms://projects/[PROJECT ID]/locations/[LOCATION]/keyRings/[KEYRING]/cryptoKeys/[KEY] --signature $sig <blob>
# Verify a signature against Hashicorp Vault
cosign verify-blob --key hashivault://[KEY] --signature $sig <blob>
# Verify a signature against GitLab with project name
cosign verify-blob --key gitlab://[OWNER]/[PROJECT_NAME] --signature $sig <blob>
# Verify a signature against GitLab with project id
cosign verify-blob --key gitlab://[PROJECT_ID] --signature $sig <blob>
# Verify a signature against a certificate
cosign verify-blob --certificate <cert> --signature $sig <blob>
--bundle string path to bundle FILE
--ca-intermediates string path to a file of intermediate CA certificates in PEM format which will be needed when building the certificate chains for the signing certificate. The flag is optional and must be used together with --ca-roots, conflicts with --certificate-chain.
--ca-roots string path to a bundle file of CA certificates in PEM format which will be needed when building the certificate chains for the signing certificate. Conflicts with --certificate-chain.
--certificate string path to the public certificate. The certificate will be verified against the Fulcio roots if the --certificate-chain option is not passed.
--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. Conflicts with --ca-roots and --ca-intermediates.
--certificate-github-workflow-name string contains the workflow claim from the GitHub OIDC Identity token that contains the name of the executed workflow.
--certificate-github-workflow-ref string contains the ref claim from the GitHub OIDC Identity token that contains the git ref that the workflow run was based upon.
--certificate-github-workflow-repository string contains the repository claim from the GitHub OIDC Identity token that contains the repository that the workflow run was based upon
--certificate-github-workflow-sha string contains the sha claim from the GitHub OIDC Identity token that contains the commit SHA that the workflow run was based upon.
--certificate-github-workflow-trigger string contains the event_name claim from the GitHub OIDC Identity token that contains the name of the event that triggered the workflow run
--certificate-identity string The identity expected in a valid Fulcio certificate. Valid values include email address, DNS names, IP addresses, and URIs. Either --certificate-identity or --certificate-identity-regexp must be set for keyless flows.
--certificate-identity-regexp string A regular expression alternative to --certificate-identity. Accepts the Go regular expression syntax described at https://golang.org/s/re2syntax. Either --certificate-identity or --certificate-identity-regexp must be set for keyless flows.
--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. Either --certificate-oidc-issuer or --certificate-oidc-issuer-regexp must be set for keyless flows.
--certificate-oidc-issuer-regexp string A regular expression alternative to --certificate-oidc-issuer. Accepts the Go regular expression syntax described at https://golang.org/s/re2syntax. Either --certificate-oidc-issuer or --certificate-oidc-issuer-regexp must be set for keyless flows.
--experimental-oci11 set to true to enable experimental OCI 1.1 behaviour
-h, --help help for verify-blob
--insecure-ignore-sct when set, verification will not check that a certificate contains an embedded SCT, a proof of inclusion in a certificate transparency log
--insecure-ignore-tlog ignore transparency log verification, to be used when an artifact signature has not been uploaded to the transparency log. Artifacts cannot be publicly verified when not included in a log
--key string path to the public key file, KMS URI or Kubernetes Secret
--max-workers int the amount of maximum workers for parallel executions (default 10)
--new-bundle-format output bundle in new format that contains all verification material
--offline only allow offline verification
--private-infrastructure skip transparency log verification when verifying artifacts in a privately deployed infrastructure
--rekor-url string address of rekor STL server (default "https://rekor.sigstore.dev")
--rfc3161-timestamp string path to RFC3161 timestamp FILE
--sct string path to a detached Signed Certificate Timestamp, formatted as a RFC6962 AddChainResponse struct. If a certificate contains an SCT, verification will check both the detached and embedded SCTs.
--signature string signature content or path or remote URL
--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)
--timestamp-certificate-chain string path to PEM-encoded certificate chain file for the RFC3161 timestamp authority. Must contain the root CA certificate. Optionally may contain intermediate CA certificates, and may contain the leaf TSA certificate if not present in the timestamp
--trusted-root string path to trusted root FILE
--use-signed-timestamps use signed timestamps if available
--output-file string log output to a file
-t, --timeout duration timeout for commands (default 3m0s)
-d, --verbose log debug output
- cosign - A tool for Container Signing, Verification and Storage in an OCI registry.