Add support for AES CFB mode in _CryptoExtras

apple / swift-crypto

Open-source implementation of a substantial portion of the API of Apple CryptoKit suitable for use on Linux platforms.

https://apple.github.io/swift-crypto

Apache License 2.0

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Add support for AES CFB mode in _CryptoExtras #252

Closed simonjbeaumont closed 2 months ago

simonjbeaumont commented 2 months ago

Motivation

We have AES support in _CryptoExtras for CBC, CTR, and GCM-SIV modes; but we do not have support for CFB.

Modifications

Add support for AES-CFB, backed by BoringSSL, with the same shape of API as we provide for AES CTR.
Copy RFCVector decoder from Crypto tests to CryptoExtrasTests.
Add test vectors from NIST.

Result

New API added to support AES-CFB.

simonjbeaumont commented 2 months ago

Thanks @Lukasa I just push an update that renamed Nonce to IV, throughout. Otherwise no changes since your review. I'll leave it with you to merge whenever it's a good time.