Temporary credentials from STS AssumeRole were using "AKIA" prefix
(permanent IAM user credentials) instead of "ASIA" prefix (temporary
security credentials). This violates AWS conventions and may cause
compatibility issues with AWS SDKs that validate credential types.
Changes:
- Rename generateAccessKeyId to generateTemporaryAccessKeyId for clarity
- Update function to use ASIA prefix for temporary credentials
- Add unit tests to verify ASIA prefix format (weed/iam/sts/credential_prefix_test.go)
- Add integration test to verify ASIA prefix in S3 API (test/s3/iam/s3_sts_credential_prefix_test.go)
- Ensure AWS-compatible credential format (ASIA + 16 hex chars)
The credentials are already deterministic (SHA256-based from session ID)
and the SessionToken is correctly set to the JWT token, so this is just
a prefix fix to follow AWS standards.
Fixes#8312
25ea48227f