| Name | Type | Description | Notes |
|---|---|---|---|
| PublicKey | string | Public key of the builder which can be used to verify that the related findings are valid and unchanged. If `key_type` is empty, this defaults to PEM encoded public keys. This field may be empty if `key_id` references an external key. For Cloud Build based signatures, this is a PEM encoded public key. To verify the Cloud Build signature, place the contents of this field into a file (public.pem). The signature field is base64-decoded into its binary representation in signature.bin, and the provenance bytes from `BuildDetails` are base64-decoded into a binary representation in signed.bin. OpenSSL can then verify the signature: `openssl sha256 -verify public.pem -signature signature.bin signed.bin` | [optional] [default to null] |
| Signature | string | Required. Signature of the related `BuildProvenance`. In JSON, this is base-64 encoded. | [optional] [default to null] |
| KeyId | string | An ID for the key used to sign. This could be either an ID for the key stored in `public_key` (such as the ID or fingerprint for a PGP key, or the CN for a cert), or a reference to an external key (such as a reference to a key in Cloud Key Management Service). | [optional] [default to null] |
| KeyType | *BuildSignatureKeyType | The type of the key, either stored in `public_key` or referenced in `key_id`. | [optional] [default to null] |