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Support mTLS in Impersonated Credentials #1

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Support mTLS in Impersonated Credentials #1

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1cc6dc1
feat: support mTLS in impersonated credentials
google-labs-jules[bot] Jan 15, 2026
3282f28
feat: support mTLS in impersonated credentials
google-labs-jules[bot] Jan 15, 2026
388ac20
feat: support mTLS in impersonated credentials
google-labs-jules[bot] Jan 15, 2026
16c3409
feat: support mTLS in impersonated credentials
google-labs-jules[bot] Jan 15, 2026
9da6b5a
feat: support mTLS in impersonated credentials
google-labs-jules[bot] Jan 15, 2026
5164a9c
feat: support mTLS in impersonated credentials
google-labs-jules[bot] Jan 15, 2026
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65 changes: 46 additions & 19 deletions google/auth/iam.py
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@
from google.auth import credentials
from google.auth import crypt
from google.auth import exceptions
from google.auth.transport import _mtls_helper

IAM_RETRY_CODES = {
http_client.INTERNAL_SERVER_ERROR,
Expand All @@ -38,25 +39,51 @@

_IAM_SCOPE = ["https://www.googleapis.com/auth/iam"]

_IAM_ENDPOINT = (
"https://iamcredentials.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:generateAccessToken"
)

_IAM_SIGN_ENDPOINT = (
"https://iamcredentials.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:signBlob"
)

_IAM_SIGNJWT_ENDPOINT = (
"https://iamcredentials.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:signJwt"
)

_IAM_IDTOKEN_ENDPOINT = (
"https://iamcredentials.googleapis.com/v1/"
+ "projects/-/serviceAccounts/{}:generateIdToken"
)
if hasattr(_mtls_helper, "check_use_client_cert"):
use_client_cert = _mtls_helper.check_use_client_cert()
else:
use_client_cert = False

if use_client_cert:
_IAM_ENDPOINT = (
"https://iamcredentials.mtls.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:generateAccessToken"
)

_IAM_SIGN_ENDPOINT = (
"https://iamcredentials.mtls.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:signBlob"
)

_IAM_SIGNJWT_ENDPOINT = (
"https://iamcredentials.mtls.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:signJwt"
)

_IAM_IDTOKEN_ENDPOINT = (
"https://iamcredentials.mtls.googleapis.com/v1/"
+ "projects/-/serviceAccounts/{}:generateIdToken"
)
else:
_IAM_ENDPOINT = (
"https://iamcredentials.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:generateAccessToken"
)

_IAM_SIGN_ENDPOINT = (
"https://iamcredentials.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:signBlob"
)

_IAM_SIGNJWT_ENDPOINT = (
"https://iamcredentials.googleapis.com/v1/projects/-"
+ "/serviceAccounts/{}:signJwt"
)

_IAM_IDTOKEN_ENDPOINT = (
"https://iamcredentials.googleapis.com/v1/"
+ "projects/-/serviceAccounts/{}:generateIdToken"
)


class Signer(crypt.Signer):
Expand Down