## cosign verify-attestation

Verify an attestation on the supplied container image

### Synopsis

Verify an attestation on an image by checking the claims
against the transparency log.

```
cosign verify-attestation [flags]
```

### Examples

```
  cosign verify-attestation --key <key path>|<key url>|<kms uri> <image uri> [<image uri> ...]

  # verify cosign attestations on the image against the transparency log
  cosign verify-attestation <IMAGE>

  # verify multiple images
  cosign verify-attestation <IMAGE_1> <IMAGE_2> ...

  # additionally verify specified annotations
  cosign verify-attestation -a key1=val1 -a key2=val2 <IMAGE>

  # verify image with public key
  cosign verify-attestation --key cosign.pub <IMAGE>

  # verify image attestations with an on-disk signed image from 'cosign save'
  cosign verify-attestation --key cosign.pub --local-image <PATH>

  # verify image with public key provided by URL
  cosign verify-attestation --key https://host.for/<FILE> <IMAGE>

  # verify image with public key stored in Google Cloud KMS
  cosign verify-attestation --key gcpkms://projects/<PROJECT>/locations/global/keyRings/<KEYRING>/cryptoKeys/<KEY> <IMAGE>

  # verify image with public key stored in Hashicorp Vault
  cosign verify-attestation --key hashivault:///<KEY> <IMAGE>

  # verify image with public key stored in GitLab with project name
  cosign verify-attestation --key gitlab://[OWNER]/[PROJECT_NAME] <IMAGE>

  # verify image with public key stored in GitLab with project id
  cosign verify-attestation --key gitlab://[PROJECT_ID] <IMAGE>

  # verify image with public key and validate attestation based on Rego policy
  cosign verify-attestation --key cosign.pub --type <PREDICATE_TYPE> --policy <REGO_POLICY> <IMAGE>

  # verify image with public key and validate attestation based on CUE policy
  cosign verify-attestation --key cosign.pub --type <PREDICATE_TYPE> --policy <CUE_POLICY> <IMAGE>
```

### Options

```
      --allow-http-registry                             whether to allow using HTTP protocol while connecting to registries. Don't use this for anything but testing
      --allow-insecure-registry                         whether to allow insecure connections to registries (e.g., with expired or self-signed TLS certificates). Don't use this for anything but testing
      --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.
      --check-claims                                    whether to check the claims found (default true)
  -h, --help                                            help for verify-attestation
      --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
      --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'
      --max-workers int                                 the amount of maximum workers for parallel executions (default 10)
  -o, --output string                                   output format for the signing image information (json|text) (default "json")
      --policy strings                                  specify CUE or Rego files with policies to be used for validation
      --registry-cacert string                          path to the X.509 CA certificate file in PEM format to be used for the connection to the registry
      --registry-client-cert string                     path to the X.509 certificate file in PEM format to be used for the connection to the registry
      --registry-client-key string                      path to the X.509 private key file in PEM format to be used, together with the 'registry-client-cert' value, for the connection to the registry
      --registry-password string                        registry basic auth password
      --registry-server-name string                     SAN name to use as the 'ServerName' tls.Config field to verify the mTLS connection to the registry
      --registry-token string                           registry bearer auth token
      --registry-username string                        registry basic auth username
      --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)
      --trusted-root string                             Path to a Sigstore TrustedRoot JSON file
      --type string                                     specify a predicate type (slsaprovenance|slsaprovenance02|slsaprovenance1|link|spdx|spdxjson|cyclonedx|vuln|openvex|custom) or an URI (default "custom")
      --use-signed-timestamps                           verify rfc3161 timestamps
```

### Options inherited from parent commands

```
      --output-file string   log output to a file
  -t, --timeout duration     timeout for commands (default 3m0s)
  -d, --verbose              log debug output
```

### SEE ALSO

* [cosign](cosign.md)	 - A tool for Container Signing, Verification and Storage in an OCI registry.

