Summary

Ported subtle.encrypt() and subtle.decrypt() from 0.x branch to work with OpenSSL 3.3+ and Nitro Modules, bringing encrypt/decrypt functionality to feature parity with 0.x.

Implementation

C++ Cipher Implementations

• Created GCMCipher with proper IV length handling via EVP_CTRL_GCM_SET_IVLEN for non-standard IVs (matching Node.js behavior)
• Created HybridRsaCipher Nitro module for RSA-OAEP encrypt/decrypt operations
• Updated HybridCipherFactory to route GCM mode to specialized cipher

TypeScript/Nitro Bindings

• Implemented aesCipher() for AES-CTR, AES-CBC, AES-GCM modes
• Implemented rsaCipher() for RSA-OAEP operations
• Created rsaCipher.nitro.ts spec with encrypt/decrypt methods
• Wired up subtle.encrypt() and subtle.decrypt() to call appropriate cipher functions
• Fixed dynamic import issue in aesGenerateKey() (Metro bundler compatibility)

Test Fixes

• Updated error message expectations for OpenSSL 3.3+
• Fixed test bugs (plaintext comparison, private key import)

Result

All 191 subtle.encrypt/decrypt tests passing ✅ (AES-CTR, AES-CBC, AES-GCM, RSA-OAEP)