Optional. An optional CRC32C checksum of the MacSignRequest.data. If specified, KeyManagementService will verify the integrity of the received MacSignRequest.data using this checksum. KeyManagementService will report an error if the checksum verification fails. If you receive a checksum error, your client should verify that CRC32C(MacSignRequest.data) is equal to MacSignRequest.data_crc32c, and if so, perform a limited number of retries. A persistent mismatch may indicate an issue in your computation of the CRC32C checksum. Note: This field is defined as int64 for reasons of compatibility across different languages. However, it is a non-negative integer, which will never exceed 2^32-1, and can be safely downconverted to uint32 in languages that support this type.
Integrity verification field. A CRC32C checksum of the returned MacSignResponse.mac. An integrity check of MacSignResponse.mac can be performed by computing the CRC32C checksum of MacSignResponse.mac and comparing your results to this field. Discard the response in case of non-matching checksum values, and perform a limited number of retries. A persistent mismatch may indicate an issue in your computation of the CRC32C checksum. Note: This field is defined as int64 for reasons of compatibility across different languages. However, it is a non-negative integer, which will never exceed 2^32-1, and can be safely downconverted to uint32 in languages that support this type.
verifiedDataCrc32c
boolean
Integrity verification field. A flag indicating whether MacSignRequest.data_crc32c was received by KeyManagementService and used for the integrity verification of the data. A false value of this field indicates either that MacSignRequest.data_crc32c was left unset or that it was not delivered to KeyManagementService. If you've set MacSignRequest.data_crc32c but this field is still false, discard the response and perform a limited number of retries.
[[["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 2025-06-23 UTC."],[],[],null,["# Method: cryptoKeyVersions.macSign\n\n- [HTTP request](#body.HTTP_TEMPLATE)\n- [Path parameters](#body.PATH_PARAMETERS)\n- [Request body](#body.request_body)\n - [JSON representation](#body.request_body.SCHEMA_REPRESENTATION)\n- [Response body](#body.response_body)\n - [JSON representation](#body.MacSignResponse.SCHEMA_REPRESENTATION)\n- [Authorization scopes](#body.aspect)\n- [Try it!](#try-it)\n\n**Full name**: projects.locations.keyRings.cryptoKeys.cryptoKeyVersions.macSign\n\nSigns data using a [CryptoKeyVersion](/kms/docs/reference/rest/v1/projects.locations.keyRings.cryptoKeys.cryptoKeyVersions#CryptoKeyVersion) with [CryptoKey.purpose](/kms/docs/reference/rest/v1/projects.locations.keyRings.cryptoKeys#CryptoKey.FIELDS.purpose) MAC, producing a tag that can be verified by another source with the same key.\n\n### HTTP request\n\nChoose a location: \nglobal europe-west3 europe-west8 europe-west9 me-central2 us-east1 us-east4 us-west2 us-west1 us-east7 us-central1 us-west3 us-central2 us-west4 us-west8 us-east5 us-south1 us in \n\n\u003cbr /\u003e\n\nThe URLs use [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\n### Path parameters\n\n### Request body\n\nThe request body contains data with the following structure:\n\n### Response body\n\nResponse message for [KeyManagementService.MacSign](/kms/docs/reference/rest/v1/projects.locations.keyRings.cryptoKeys.cryptoKeyVersions/macSign#google.cloud.kms.v1.KeyManagementService.MacSign).\n\nIf successful, the response body contains data with the following structure:\n\n### Authorization scopes\n\nRequires one of the following OAuth scopes:\n\n- `https://www.googleapis.com/auth/cloudkms`\n- `https://www.googleapis.com/auth/cloud-platform`\n\nFor more information, see the [Authentication Overview](/docs/authentication#authorization-gcp)."]]