[jdk15u-dev] RFR: 8278851: Correct signer logic for jars signed with multiple digest algorithms

Wed Apr 27 10:36:15 UTC 2022

Backport for parity with major releases. Some context changes were necessary in source part; private toHex function was used instead of HexFormat; and I borrowed test/lib/jdk/test/lib/security/SecurityUtils.java from JDK 11. 
All JDK security tests run OK.

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Commit messages:
 - Backport 61b8944327e3d12cf58dc3f6bc45ecbeba4ef611

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/202/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=202&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278851
  Stats: 272 lines in 4 files changed: 221 ins; 19 del; 32 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/202.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/202/head:pull/202

PR: https://git.openjdk.java.net/jdk15u-dev/pull/202