chacha20

v0.10.0 Growing

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.

MIT OR Apache-2.0 Edition 2024 MSRV 1.85

Cryptography No standard library #crypto#stream-cipher#xchacha20#chacha8#chacha12

GitHub ↗ Docs ↗ crates.io ↗ Compare with…

Quick Verdict

✓Actively maintained (updated 48d ago)
!Pre-1.0: API may have breaking changes
✓Massive adoption (1.4K crates depend on it)
✓Team maintained (2 owners)
✓Permissive license (MIT OR Apache-2.0)

Security

Checking security advisories...

Downloads

61.7M

Dependents

1.4K

Releases

Size

39KB

Deep Insights

📈

Strong growth momentum

8.9M downloads in the last 30 days (297.8K/day), up 85% from the previous period.

🔗

Widely adopted

1.4K crates depend on chacha20. Strong ecosystem adoption means battle-tested code and long-term stability.

👤

Prolific maintainer

The primary maintainer publishes 211 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

🔬

Pre-1.0 for over a year

Despite being 9+ years old, chacha20 hasn't reached 1.0 yet. Expect potential API changes between versions.

📐

Compact crate

At 38KB, chacha20 is lightweight. Small crate size correlates with focused, well-scoped functionality.

⚠️

Notable yanked versions

14% of releases have been yanked. Check version history before pinning.

🌟

Used by top crates

Notable dependents include rand, crypto-bigint, chacha20poly1305, crypto_secretbox, smoldot. When high-quality crates choose chacha20, it's a strong quality signal.