Implementations of the ChaCha20 + Poly1305 and XChaCha20 + Poly1305 AEAD constructions with a goal of simplicity and correctness rather than performance.
This code provides a portable C reference implementation of two AEAD constructions built on top of the ChaCha20 reference implementation from SUPERCOP and Poly1305-donna.
One construction is XChaCha20 + Poly1305 in a style similar to
NaCl's crypto_secretbox_xsalsa20poly1305
but using XChaCha20 instead of XSalsa20.
The other construction is ChaCha20 + Poly1305 as specified in RFC 7539.
Copyright (C) 2016 Will Glozer.
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