fix(workloadapi): refresh cached JWT SVIDs without iat#430
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Signed-off-by: Max Lambrecht <maxlambrecht@gmail.com>
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What
Update
CachedJwtSourceso cached JWT SVIDs without aniatclaim are treated as needing refresh instead of computing half-life from a missing issued-at value.Add a regression test that seeds the cache with a JWT SVID containing
subandexpbut noiat, then verifies the cache path does not throwNullPointerException.Why
JwtSvidparsing currently allows JWT SVIDs withoutiat, butCachedJwtSource.isTokenPastHalfLifetimeassumedgetIssuedAt()was always available. That could crash cache reuse with aNullPointerException.The fix keeps JWT SVID validation behavior unchanged and makes only the cache behavior more conservative.
How tested
Ran:
./gradlew :java-spiffe-core:test --tests io.spiffe.workloadapi.CachedJwtSourceTest --tests io.spiffe.workloadapi.DefaultJwtSourceTest