Check for RSAPrivateCrtKey in WolfCryptCipher for RSA

[cconlon]

WolfCryptCipher RSA currently only supports PrivateKey objects of type RSAPrivateCrtKey. This PR adjusts to throw an exception if the key does not include CRT parameters, as required by native wolfSSL. This gives users a more meaningful error/exception up front rather than a mp_exptmod error later on.

JUnit tests included for regression prevention.

This helps fix OpenJDK SunJCE test: crypto/provider/Cipher/RSA/TestRSA.java

[Copilot]

Pull Request Overview

This PR adds validation to ensure that RSA private keys used with WolfCryptCipher include CRT (Chinese Remainder Theorem) parameters, which are required by the underlying wolfSSL library. Instead of allowing non-CRT keys to fail later with cryptic native errors, the code now throws a clear InvalidKeyException upfront.

• Adds instanceof check for RSAPrivateCrtKey in WolfCryptCipher.wolfCryptSetKey()
• Throws descriptive InvalidKeyException when non-CRT RSA private keys are provided
• Includes comprehensive JUnit tests covering both positive and negative scenarios

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/main/java/com/wolfssl/provider/jce/WolfCryptCipher.java	Adds CRT parameter validation for RSA private keys with descriptive error message
src/test/java/com/wolfssl/provider/jce/test/WolfCryptCipherTest.java	Adds test coverage for CRT key validation including positive, negative, and public key scenarios

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