Method: projects.serviceAccounts.signBlob

Signs a blob using the system-managed private key for a ServiceAccount.

HTTP request

POST https://iam.googleapis.com/v1/{name=projects/*/serviceAccounts/*}:signBlob

The URL uses gRPC Transcoding syntax.

Path parameters

Parameters
name
(deprecated)

string

Required. Deprecated. Migrate to Service Account Credentials API.

The resource name of the service account.

Use one of the following formats:

  • projects/{PROJECT_ID}/serviceAccounts/{EMAIL_ADDRESS}
  • projects/{PROJECT_ID}/serviceAccounts/{UNIQUE_ID}

As an alternative, you can use the - wildcard character instead of the project ID:

  • projects/-/serviceAccounts/{EMAIL_ADDRESS}
  • projects/-/serviceAccounts/{UNIQUE_ID}

When possible, avoid using the - wildcard character, because it can cause response messages to contain misleading error codes. For example, if you try to access the service account projects/-/serviceAccounts/fake@example.com, which does not exist, the response contains an HTTP 403 Forbidden error instead of a 404 Not Found error.

Authorization requires the following IAM permission on the specified resource name:

  • iam.serviceAccounts.signBlob

Request body

The request body contains data with the following structure:

JSON representation 
{
  "bytesToSign": string
}
Fields
bytesToSign
(deprecated)

string (bytes format)

Required. Deprecated. Migrate to Service Account Credentials API.

The bytes to sign.

A base64-encoded string.

Response body

Deprecated. Migrate to Service Account Credentials API.

The service account sign blob response.

If successful, the response body contains data with the following structure:

JSON representation 
{
  "keyId": string,
  "signature": string
}
Fields
keyId
(deprecated)

string

Deprecated. Migrate to Service Account Credentials API.

The id of the key used to sign the blob.
signature
(deprecated)

string (bytes format)

Deprecated. Migrate to Service Account Credentials API.

The signed blob.

A base64-encoded string.

Authorization scopes

Requires one of the following OAuth scopes:

  • https://www.googleapis.com/auth/iam
  • https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.