Add wolfJCE EC KeyFactory implementation

[cconlon]

This PR adds our own implementation of EC KeyFactory (KeyFactory.getInstance('EC')).

We were previously using the EC KeyFactory from the SunEC provider, since the class itself was not doing any crypto proper just conversion of keying material. In running the OpenJDK SunJCE tests on top of wolfJCE, we observed some areas of the SunEC implementation that call down to SunJCE. For systems that have removed SunJCE, this is problematic and implementing our own version resolves the issue.

JUnit tests included for testing and regression.

[Copilot]

Pull Request Overview

This PR implements the EC KeyFactory (KeyFactory.getInstance('EC')) for wolfJCE, enabling conversion of EC keying material between various KeySpec formats using wolfCrypt rather than the SunEC provider. The change addresses compatibility issues when SunJCE is not available, as wolfJCE now provides its own complete EC KeyFactory implementation.

Key changes:

• Added new EC KeyFactory implementation with support for PKCS8EncodedKeySpec, X509EncodedKeySpec, ECPrivateKeySpec, and ECPublicKeySpec conversion
• Extended Ecc native wrapper with curve parameter management and raw key import/export functionality
• Added comprehensive test coverage for the new KeyFactory implementation

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/main/java/com/wolfssl/provider/jce/WolfCryptECKeyFactory.java	Complete EC KeyFactory implementation handling key conversions between various formats
src/main/java/com/wolfssl/provider/jce/WolfCryptECPrivateKey.java	EC private key implementation supporting DER encoding and raw parameter extraction
src/main/java/com/wolfssl/provider/jce/WolfCryptECPublicKey.java	EC public key implementation supporting X.509 encoding and coordinate extraction
src/main/java/com/wolfssl/provider/jce/WolfCryptECParameterSpec.java	Enhanced EC parameter handling with curve name metadata and parameter validation
src/main/java/com/wolfssl/wolfcrypt/Ecc.java	Extended native interface with curve parameter access and raw key import/export
src/main/java/com/wolfssl/provider/jce/WolfCryptProvider.java	Registration of the new EC KeyFactory service
jni/jni_ecc.c	Native implementation for curve parameter extraction and raw key operations
src/test/java/com/wolfssl/provider/jce/test/WolfCryptECKeyFactoryTest.java	Comprehensive test suite for the EC KeyFactory implementation

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[Copilot]

Pull Request Overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 6 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 28 out of 28 changed files in this pull request and generated 4 comments.

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