The content of the signature, an opaque bytestring.
The payload that this signature verifies MUST be unambiguously provided
with the Signature during verification. A wrapper message might provide
the payload explicitly. Alternatively, a message might have a canonical
serialization that can always be unambiguously computed to derive the
payload.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Interface SignatureOrBuilder (2.73.0)\n\nVersion latestkeyboard_arrow_down\n\n- [2.73.0 (latest)](/java/docs/reference/grafeas/latest/io.grafeas.v1.SignatureOrBuilder)\n- [2.71.0](/java/docs/reference/grafeas/2.71.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.69.0](/java/docs/reference/grafeas/2.69.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.68.0](/java/docs/reference/grafeas/2.68.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.65.0](/java/docs/reference/grafeas/2.65.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.64.0](/java/docs/reference/grafeas/2.64.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.63.0](/java/docs/reference/grafeas/2.63.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.61.0](/java/docs/reference/grafeas/2.61.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.60.0](/java/docs/reference/grafeas/2.60.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.59.0](/java/docs/reference/grafeas/2.59.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.58.0](/java/docs/reference/grafeas/2.58.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.57.0](/java/docs/reference/grafeas/2.57.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.56.0](/java/docs/reference/grafeas/2.56.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.55.0](/java/docs/reference/grafeas/2.55.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.54.0](/java/docs/reference/grafeas/2.54.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.53.0](/java/docs/reference/grafeas/2.53.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.52.0](/java/docs/reference/grafeas/2.52.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.50.0](/java/docs/reference/grafeas/2.50.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.49.0](/java/docs/reference/grafeas/2.49.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.48.0](/java/docs/reference/grafeas/2.48.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.47.0](/java/docs/reference/grafeas/2.47.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.46.0](/java/docs/reference/grafeas/2.46.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.45.0](/java/docs/reference/grafeas/2.45.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.44.0](/java/docs/reference/grafeas/2.44.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.43.0](/java/docs/reference/grafeas/2.43.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.42.0](/java/docs/reference/grafeas/2.42.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.41.0](/java/docs/reference/grafeas/2.41.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.40.0](/java/docs/reference/grafeas/2.40.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.38.0](/java/docs/reference/grafeas/2.38.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.37.0](/java/docs/reference/grafeas/2.37.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.36.0](/java/docs/reference/grafeas/2.36.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.35.0](/java/docs/reference/grafeas/2.35.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.34.0](/java/docs/reference/grafeas/2.34.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.33.0](/java/docs/reference/grafeas/2.33.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.32.0](/java/docs/reference/grafeas/2.32.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.31.0](/java/docs/reference/grafeas/2.31.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.30.0](/java/docs/reference/grafeas/2.30.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.29.0](/java/docs/reference/grafeas/2.29.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.28.0](/java/docs/reference/grafeas/2.28.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.25.0](/java/docs/reference/grafeas/2.25.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.24.0](/java/docs/reference/grafeas/2.24.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.23.0](/java/docs/reference/grafeas/2.23.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.22.0](/java/docs/reference/grafeas/2.22.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.21.0](/java/docs/reference/grafeas/2.21.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.20.0](/java/docs/reference/grafeas/2.20.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.19.0](/java/docs/reference/grafeas/2.19.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.18.0](/java/docs/reference/grafeas/2.18.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.17.0](/java/docs/reference/grafeas/2.17.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.16.0](/java/docs/reference/grafeas/2.16.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.15.0](/java/docs/reference/grafeas/2.15.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.14.0](/java/docs/reference/grafeas/2.14.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.13.0](/java/docs/reference/grafeas/2.13.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.12.0](/java/docs/reference/grafeas/2.12.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.10.0](/java/docs/reference/grafeas/2.10.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.9.0](/java/docs/reference/grafeas/2.9.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.8.0](/java/docs/reference/grafeas/2.8.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.7.0](/java/docs/reference/grafeas/2.7.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.6.0](/java/docs/reference/grafeas/2.6.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.5.0](/java/docs/reference/grafeas/2.5.0/io.grafeas.v1.SignatureOrBuilder)\n- [2.4.5](/java/docs/reference/grafeas/2.4.5/io.grafeas.v1.SignatureOrBuilder)\n- [2.3.1](/java/docs/reference/grafeas/2.3.1/io.grafeas.v1.SignatureOrBuilder)\n- [2.2.3](/java/docs/reference/grafeas/2.2.3/io.grafeas.v1.SignatureOrBuilder)\n- [2.1.3](/java/docs/reference/grafeas/2.1.3/io.grafeas.v1.SignatureOrBuilder) \n\n public interface SignatureOrBuilder extends MessageOrBuilder\n\nImplements\n----------\n\n[MessageOrBuilder](https://cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.MessageOrBuilder.html)\n\nMethods\n-------\n\n### getPublicKeyId()\n\n public abstract String getPublicKeyId()\n\nThe identifier for the public key that verifies this signature.\n\n- The `public_key_id` is required.\n- The `public_key_id` SHOULD be an RFC3986 conformant URI.\n- When possible, the `public_key_id` SHOULD be an immutable reference,\n such as a cryptographic digest.\n\n Examples of valid `public_key_id`s:\n\n OpenPGP V4 public key fingerprint:\n- \"openpgp4fpr:74FAF3B861BDA0870C7B6DEF607E48D2A663AEEA\"\n See \u003chttps://www.iana.org/assignments/uri-schemes/prov/openpgp4fpr\u003e for more\n details on this scheme.\n\n RFC6920 digest-named SubjectPublicKeyInfo (digest of the DER\n serialization):\n- \"ni:///sha-256;cD9o9Cq6LG3jD0iKXqEi_vdjJGecm_iXkbqVoScViaU\"\n- \"nih:///sha-256;703f68f42aba2c6de30f488a5ea122fef76324679c9bf89791ba95a1271589a5\"\n\n`string public_key_id = 2;`\n\n### getPublicKeyIdBytes()\n\n public abstract ByteString getPublicKeyIdBytes()\n\nThe identifier for the public key that verifies this signature.\n\n- The `public_key_id` is required.\n- The `public_key_id` SHOULD be an RFC3986 conformant URI.\n- When possible, the `public_key_id` SHOULD be an immutable reference,\n such as a cryptographic digest.\n\n Examples of valid `public_key_id`s:\n\n OpenPGP V4 public key fingerprint:\n- \"openpgp4fpr:74FAF3B861BDA0870C7B6DEF607E48D2A663AEEA\"\n See \u003chttps://www.iana.org/assignments/uri-schemes/prov/openpgp4fpr\u003e for more\n details on this scheme.\n\n RFC6920 digest-named SubjectPublicKeyInfo (digest of the DER\n serialization):\n- \"ni:///sha-256;cD9o9Cq6LG3jD0iKXqEi_vdjJGecm_iXkbqVoScViaU\"\n- \"nih:///sha-256;703f68f42aba2c6de30f488a5ea122fef76324679c9bf89791ba95a1271589a5\"\n\n`string public_key_id = 2;`\n\n### getSignature()\n\n public abstract ByteString getSignature()\n\nThe content of the signature, an opaque bytestring.\nThe payload that this signature verifies MUST be unambiguously provided\nwith the Signature during verification. A wrapper message might provide\nthe payload explicitly. Alternatively, a message might have a canonical\nserialization that can always be unambiguously computed to derive the\npayload.\n\n`bytes signature = 1;`"]]