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
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
|
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. Migrate to Service Account Credentials API . The id of the key used to sign the blob. |
signature
|
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 .

