- Add CRC32 checksum support using IEEE 802.3 polynomial
- Update sc_encrypt/sc_decrypt API: combine tag and CRC32 into single buffer
- Add SC_CRC32_SIZE, SC_MAX_OVERHEAD constants and SC_ERR_CRC_FAILED error code
- Implement CRC32 calculation before encryption and verification after decryption
- Update connection.c to use new API with error statistics tracking
- Modify test files for compatibility with new API
- All tests pass successfully
Evgeny