[jdk17u-dev] RFR: 8271566: DSA signature length value is not accurate in P11Signature

[Martin Balao]

Hi,

I would like to request a review for the backport of [8271566](https://bugs.openjdk.org/browse/JDK-8271566) to jdk17u-dev.

The original patch does not apply cleanly due to context differences in some parts of P11Key.java. In particular, jdk17u lacks of [8274393](https://bugs.openjdk.org/browse/JDK-8274393) that introduces `@SuppressWarnings("serial")` lines. jdk17u does not have the [8160675](https://bugs.openjdk.org/browse/JDK-8160675) enhancement so it does not need [8274393](https://bugs.openjdk.org/browse/JDK-8274393) to be backported as a dependency.

No regressions observed in the "jdk/sun/security/pkcs11" tests category.

Thanks,
Martin.-

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Commit messages:
 - Backport ea8d3c92c69c393cdbc6c62398f1e9c6adc708d3

Changes: https://git.openjdk.org/jdk17u-dev/pull/1982/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1982&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8271566
  Stats: 582 lines in 2 files changed: 282 ins; 112 del; 188 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1982.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1982/head:pull/1982

PR: https://git.openjdk.org/jdk17u-dev/pull/1982