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test(auth): Assert JWT headers and claims (alg, typ, iat, exp) #13472

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Merged
westarle merged 2 commits into from
Jun 16, 2026
+20 −0
Merged

test(auth): Assert JWT headers and claims (alg, typ, iat, exp) #13472

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dd6a9e7
test(auth): Assert JWT headers and claims (alg, typ, iat, exp)
westarle Jun 15, 2026
78e6f0c
Merge branch 'main' into fix-test-gap-jwt-headers
westarle Jun 16, 2026
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10 changes: 10 additions & 0 deletions ...rary-java/oauth2_http/javatests/com/google/auth/oauth2/ServiceAccountCredentialsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1777,6 +1777,8 @@ private void verifyJwtAccess(Map<String, List<String>> metadata, String expected
assertNotNull(assertion, "Bearer assertion not found");
JsonWebSignature signature =
JsonWebSignature.parse(GsonFactory.getDefaultInstance(), assertion);
assertEquals("RS256", signature.getHeader().getAlgorithm());
assertEquals("JWT", signature.getHeader().getType());
assertEquals(CLIENT_EMAIL, signature.getPayload().getIssuer());
assertEquals(CLIENT_EMAIL, signature.getPayload().getSubject());
if (expectedScopeClaim != null) {
Expand All @@ -1787,6 +1789,14 @@ private void verifyJwtAccess(Map<String, List<String>> metadata, String expected
assertFalse(signature.getPayload().containsKey("scope"));
}
assertEquals(PRIVATE_KEY_ID, signature.getHeader().getKeyId());

Long iat = signature.getPayload().getIssuedAtTimeSeconds();
Long exp = signature.getPayload().getExpirationTimeSeconds();
assertNotNull(iat);
assertNotNull(exp);
assertEquals(3600L, exp - iat);
long currentTimeSecs = System.currentTimeMillis() / 1000;
assertTrue(Math.abs(currentTimeSecs - iat) < 60);
}

static GenericJson writeServiceAccountJson(
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10 changes: 10 additions & 0 deletions .../oauth2_http/javatests/com/google/auth/oauth2/ServiceAccountJwtAccessCredentialsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -914,6 +914,8 @@ private void verifyJwtAccess(Map<String, List<String>> metadata, URI expectedAud
}
assertNotNull(assertion, "Bearer assertion not found");
JsonWebSignature signature = JsonWebSignature.parse(JSON_FACTORY, assertion);
assertEquals("RS256", signature.getHeader().getAlgorithm());
assertEquals("JWT", signature.getHeader().getType());
assertEquals(
ServiceAccountJwtAccessCredentialsTest.SA_CLIENT_EMAIL, signature.getPayload().getIssuer());
assertEquals(
Expand All @@ -922,6 +924,14 @@ private void verifyJwtAccess(Map<String, List<String>> metadata, URI expectedAud
assertEquals(expectedAudience.toString(), signature.getPayload().getAudience());
assertEquals(
ServiceAccountJwtAccessCredentialsTest.SA_PRIVATE_KEY_ID, signature.getHeader().getKeyId());

Long iat = signature.getPayload().getIssuedAtTimeSeconds();
Long exp = signature.getPayload().getExpirationTimeSeconds();
assertNotNull(iat);
assertNotNull(exp);
assertEquals(3600L, exp - iat);
long currentTimeSecs = System.currentTimeMillis() / 1000;
assertTrue(Math.abs(currentTimeSecs - iat) < 60);
}

private static void testFromStreamException(InputStream stream, String expectedMessageContent) {
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