RFR: 8286908: ECDSA signature should not return parameters [v2]

[Hai-May Chao]

On Wed, 18 May 2022 22:27:18 GMT, Weijun Wang <weijun at openjdk.org> wrote:

>> Let ECDSA's `engineGetParameters()` always return null. At the same time, remove the remembered `sigParams` field. One behavior change is that after calling `setParameter()`, one can call `init()` again with a key using different parameters. I think this should be allowed since we are reusing the signature object with a brand new key.
>> 
>> `setParameter` is kept unchanged to be able to deal with certificates still having parameters after the signature algorithm object identifier. See https://bugs.openjdk.java.net/browse/JDK-8225745.
>> 
>> Also added SHA1withECDSA to the no-NULL list in `KnownOIDs`.
>> 
>> All security-related tests passed.
>
> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   will not read params for ECDSA

src/java.base/share/classes/sun/security/util/SignatureUtil.java line 156:

> 154:                 // Some certificates have params in an ECDSA algorithmID,
> 155:                 // they are useless and should be ignored.
> 156:                 return null;

Suggest adding the RFC reference for this change.

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PR: https://git.openjdk.java.net/jdk/pull/8758