Convert symmetric ciphers to Rust

[alex]

TODO:

• Expose ChaCha20 on LibreSSL sfackler/rust-openssl#2093
• Revert "Correct off-by-one in minimum output buffer size computation" sfackler/rust-openssl#2090
• Added update_unchecked to symm::Crypter sfackler/rust-openssl#2100
• rust-openssl release
• LibreSSL version bump
• Chunking
• Coverage
  • PyAEADEncryptionContext::update_into bytes remaining check
  • PyAEADDecryptionContext::update bytes remaining check
  • PyAEADDecryptionContext::update_into bytes remaining check
  • PyAEADDecryptionContext::authenticate_additional_data bytes remaining check
  • PyAEADDecryptionContext::finalize_with_tag duplicate tag check
  • AlreadyUpdated in PyAEADDecryptionContext::authenticate_additional_data
  • 0 length CffiMutBuf
  • XTS error checks

[jlaine]

Hi @alex! I'm hitting a deprecation regarding ARC4 when I use this branch, even when I'm not touching ARC4:

>>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
>>> Cipher(algorithm=algorithms.AES(bytes(16)), mode=modes.ECB()).encryptor()
/path/to/env/lib/python3.11/site-packages/cryptography/hazmat/primitives/ciphers/base.py:107: CryptographyDeprecationWarning: ARC4 has been moved to cryptography.hazmat.decrepit.ciphers.algorithms.ARC4 and will be removed from this module in 48.0.0.
  return rust_openssl.ciphers.create_encryption_ctx(

[alex]

I haven't updated this branch since @reaperhulk deprecated ARC4, I think types.rs just needs a simple update.

[reaperhulk]

secdev/scapy#4285 should unblock us here.