chacha20 0.9.1

The ChaCha20 stream cipher (RFC 8439) implemented in pure Rust using traits from the RustCrypto `cipher` crate, with optional architecture-specific hardware acceleration (AVX2, SSE2). Additionally provides the ChaCha8, ChaCha12, XChaCha20, XChaCha12 and XChaCha8 stream ciphers, and also optional rand_core-compatible RNGs based on those ciphers.
Documentation 
#![feature(test)]
extern crate test;

cipher::stream_cipher_bench!(
    chacha20::ChaCha8;
    chacha8_bench1_16b 16;
    chacha8_bench2_256b 256;
    chacha8_bench3_1kib 1024;
    chacha8_bench4_16kib 16384;
);

cipher::stream_cipher_bench!(
    chacha20::ChaCha12;
    chacha12_bench1_16b 16;
    chacha12_bench2_256b 256;
    chacha12_bench3_1kib 1024;
    chacha12_bench4_16kib 16384;
);

cipher::stream_cipher_bench!(
    chacha20::ChaCha20;
    chacha20_bench1_16b 16;
    chacha20_bench2_256b 256;
    chacha20_bench3_1kib 1024;
    chacha20_bench4_16kib 16384;
);