chacha20 0.5.0

The ChaCha20 stream cipher (RFC 8439) implemented in pure Rust using traits from the RustCrypto stream-cipher crate, with optional architecture-specific hardware acceleration (AVX2, SSE2). Additionally provides the ChaCha8, ChaCha12, and XChaCha20 stream ciphers, and also optional rand_core-compatible RNGs based on those ciphers.
Documentation 
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[package]
name = "chacha20"
version = "0.5.0"
authors = ["RustCrypto Developers"]
license = "Apache-2.0 OR MIT"
description = """
The ChaCha20 stream cipher (RFC 8439) implemented in pure Rust using traits
from the RustCrypto stream-cipher crate, with optional architecture-specific
hardware acceleration (AVX2, SSE2). Additionally provides the ChaCha8, ChaCha12,
and XChaCha20 stream ciphers, and also optional rand_core-compatible RNGs based
on those ciphers.
"""
repository = "https://github.com/RustCrypto/stream-ciphers"
keywords = ["crypto", "stream-cipher", "chacha8", "chacha12", "xchacha20"]
categories = ["cryptography", "no-std"]
readme = "README.md"
edition = "2018"

[dependencies]
rand_core = { version = "0.5", optional = true, default-features = false }
stream-cipher = { version = "0.7", optional = true }
zeroize = { version = "1", optional = true, default-features = false }

[dev-dependencies]
stream-cipher = { version = "0.7", features = ["dev"] }
hex-literal = "0.2"

[features]
default = ["xchacha20"]
legacy = ["stream-cipher"]
xchacha20 = ["stream-cipher"]
rng = ["rand_core"]

[package.metadata.docs.rs]
all-features = true
rustdoc-args = ["--cfg", "docsrs"]