git: crypto: Add hchacha20() for implementing XChaCha20-Poly1305 AEAD

[Aaron LI]

commit ec5a219c36b9cdf8f8c0b84711675ea0e9502feb
Author: Aaron LI <aly at aaronly.me>
Date:   Tue Nov 21 17:58:29 2023 +0800

    crypto: Add hchacha20() for implementing XChaCha20-Poly1305 AEAD
    
    Derived from OpenBSD.  I changed memcpy() to multiple U32TO8_LITTLE()s,
    so the output key is in the standard little-endian format.
    
    Reference:
    - RFC draft: XChaCha: eXtended-nonce ChaCha and AEAD_XChaCha20_Poly1305

Summary of changes:
 sys/crypto/chacha20/chacha.c | 48 ++++++++++++++++++++++++++++++++++++++++++++
 sys/crypto/chacha20/chacha.h |  3 +++
 2 files changed, 51 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/ec5a219c36b9cdf8f8c0b84711675ea0e9502feb


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