Signature verification object
The response will include a verification object that describes the result of verifying the commit's signature. The following fields are included in the verification object:
| Name | Type | Description |
| ---- | ---- | ----------- |
| verified | boolean | Indicates whether GitHub considers the signature in this commit to be verified. |
| reason | string | The reason for verified value. Possible values and their meanings are enumerated in table below. |
| signature | string | The signature that was extracted from the commit. |
| payload | string | The value that was signed. |
These are the possible values for reason in the verification object:
| Value | Description |
| ----- | ----------- |
| expired_key | The key that made the signature is expired. |
| not_signing_key | The "signing" flag is not among the usage flags in the GPG key that made the signature. |
| gpgverify_error | There was an error communicating with the signature verification service. |
| gpgverify_unavailable | The signature verification service is currently unavailable. |
| unsigned | The object does not include a signature. |
| unknown_signature_type | A non-PGP signature was found in the commit. |
| no_user | No user was associated with the committer email address in the commit. |
| unverified_email | The committer email address in the commit was associated with a user, but the email address is not verified on her/his account. |
| bad_email | The committer email address in the commit is not included in the identities of the PGP key that made the signature. |
| unknown_key | The key that made the signature has not been registered with any user's account. |
| malformed_signature | There was an error parsing the signature. |
| invalid | The signature could not be cryptographically verified using the key whose key-id was found in the signature. |
| valid | None of the above errors applied, so the signature is considered to be verified. |