Kousuke Saruta created SPARK-57890:
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Summary: Add core credential types (UserContext,
ServiceCredential, UserCredentials)
Key: SPARK-57890
URL: https://issues.apache.org/jira/browse/SPARK-57890
Project: Spark
Issue Type: Sub-task
Components: Spark Core
Affects Versions: 4.3.0
Reporter: Kousuke Saruta
### Problem
There are no types in Spark to represent an OIDC identity or short-lived
delegated credentials for propagation to executor
s.
### Goal
Introduce the foundational types that the rest of the credential propagation
framework builds on.
### Scope
Add to `org.apache.spark.security`:
- `UserContext`: Driver-side identity (principal, issuer, rawToken, issuedAt,
expiresAt). Not Serializable (driver-only). `toString()` redacts rawToken.
- `ServiceCredential`: Short-lived delegated credential (properties:
Map[String, String], expiresAt). Serializable.
- `UserCredentials`: Per-scheme Map[String, ServiceCredential] bundle.
Serializable. Does not contain UserContext or rawToken.
### Acceptance criteria
- Types compile and are usable from Scala and Java.
- `UserContext.toString()` does not expose rawToken.
- `UserCredentials` can be serialized and deserialized without loss.
- Unit tests cover serialization round-trip, redaction, and basic operations
(forScheme lookup, expiry checks).
Reference: SPIP design document Appendix A.
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