RFR: 8339280: jarsigner -verify performs cross-checking between CEN and LOC [v8]

[Hai-May Chao]

> The jarsigner -verify command currently performs verification by reading from JarFile to navigate the central directory (CEN) headers. It is now enhanced to include cross-validation of entries between JarFile (CEN-based) and JarInputStream (stream-based) representations of the JAR. It emits earnings when detecting discrepancies between a JAR file’s central directory and its local file entries.

Hai-May Chao has updated the pull request incrementally with one additional commit since the last revision:

  Update readEntry() and accumulate more warnings in compareManifest()

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23532/files
  - new: https://git.openjdk.org/jdk/pull/23532/files/5d93e4dc..ef546f4b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23532&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23532&range=06-07

  Stats: 11 lines in 1 file changed: 3 ins; 2 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/23532.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23532/head:pull/23532

PR: https://git.openjdk.org/jdk/pull/23532