JCE: Add P1363 ECDSA signature formats, fix parameter handling, and improve ECC defaults

[cconlon]

This PR includes the following changes to JCE Signature and ECC functionality:

• Fix ECDSA signature parameter handling and secp521r1 curve recognition
• Add support for IEEE P1363 format ECDSA signatures, specifically SHA256withECDSAinP1363Format, SHA384withECDSAinP1363Format, SHA512withECDSAinP1363Format, SHA3-256withECDSAinP1363Format, SHA3-384withECDSAinP1363Format, and SHA3-512withECDSAinP1363Format.
• Add default 256-bit key size for ECC KeyPairGenerator

This includes JUnit tests for regression prevention and fixes running against several of the OpenJDK SunJCE ECDSA tests.

[Copilot]

Pull Request Overview

This PR enhances the wolfJCE provider with IEEE P1363 ECDSA signature format support and improves ECC parameter handling. The changes fix several issues with ECDSA signature parameter validation and add comprehensive P1363 format signature support across multiple hash algorithms.

Key changes include:

• Added support for six new IEEE P1363 format ECDSA signature algorithms (SHA256/384/512 and SHA3-256/384/512 with ECDSA in P1363 format)
• Fixed secp521r1 curve recognition by adjusting field size calculation for proper wolfCrypt parameter matching
• Added default 256-bit key size for ECC KeyPairGenerator to enable generation without explicit initialization

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
WolfCryptSignature.java	Added P1363 format conversion logic and six new signature algorithm implementations
WolfCryptProvider.java	Registered P1363 format signature algorithms with the JCE provider
Ecc.java	Enhanced curve recognition with adjusted field size calculation and added P1363 conversion methods
WolfCryptKeyPairGenerator.java	Added default 256-bit ECC key size initialization
WolfCryptSignatureP1363Test.java	New comprehensive test suite for P1363 signature format validation
WolfCryptSignatureTest.java	Added regression tests for ECDSA parameter handling
EccTest.java	Added test for secp521r1 curve recognition
jni_ecc.c	Implemented native JNI methods for P1363 signature format conversion

Comments suppressed due to low confidence (2)

src/test/java/com/wolfssl/provider/jce/test/WolfCryptSignatureP1363Test.java:1

• The comment style is inconsistent with Java conventions. Use // for single-line comments instead of /* */ to maintain consistency with the rest of the codebase.

/* WolfCryptSignatureP1363Test.java

src/test/java/com/wolfssl/provider/jce/test/WolfCryptSignatureP1363Test.java:1

• The comment style is inconsistent with Java conventions. Use // for multi-line comments instead of /* */ to maintain consistency with the rest of the codebase.

/* WolfCryptSignatureP1363Test.java

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[Copilot]

Pull Request Overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.

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