[jdk7u] RFR: 8285591: [11] add signum checks in DSA.java engineVerify

Tue Jun 7 00:03:38 UTC 2022

This is DSA related part of JDK-8277233 security fix. The remaining part of JDK-8277233 is only applicable to 15u and later versions.

This fix is applicable to 13u and older versions. It ensures that the signature components r, s are positive integers, as required by FIPS PUB 186-4 Section 4.7.

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Commit messages:
 - Backport bf3438c5dc993b96d089cabb5318bfc64a6904a3

Changes: https://git.openjdk.java.net/jdk7u/pull/8/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk7u&pr=8&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8285591
  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk7u/pull/8.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk7u pull/8/head:pull/8

PR: https://git.openjdk.java.net/jdk7u/pull/8