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pkcs1

v0.7.5 Growing

Pure Rust implementation of Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.2 (RFC 8017)

Apache-2.0 OR MIT Edition 2021 MSRV 1.60

Quick Verdict

  • !Pre-1.0: API may have breaking changes
  • โœ“Trusted by 568 crates
  • โœ“Team maintained (3 owners)
  • โœ“Permissive license (Apache-2.0 OR MIT)

Security

Checking security advisories...
Downloads
128.8M
Dependents
568
Releases
27
Size
36KB

Deep Insights

๐Ÿ“ˆ
Strong growth momentum

11.4M downloads in the last 30 days (380.5K/day), up 31% from the previous period.

๐Ÿ”—
Moderate adoption

568 crates depend on pkcs1. Reasonable ecosystem adoption, though not yet a core dependency.

๐Ÿ‘ค
Prolific maintainer

The primary maintainer publishes 215 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 5+ years old, pkcs1 hasn't reached 1.0 yet. Expect potential API changes between versions.

๐Ÿ“
Compact crate

At 35KB, pkcs1 is lightweight. Small crate size correlates with focused, well-scoped functionality.

โš ๏ธ
Notable yanked versions

15% of releases have been yanked. Check version history before pinning.

๐ŸŒŸ
Used by top crates

Notable dependents include rsa, c2pa, russh, russh-keys, apple-codesign. When high-quality crates choose pkcs1, it's a strong quality signal.

Health Breakdown

Maintenance 10/25

Recency, release consistency, active ratio

Quality 12/25

Yanked ratio, deps, size, maturity, features

Community 19/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 12/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
290K/day avg+79%
0100K200K300K400K500K12/291/162/32/213/113/28

Top Dependents

Version Adoption

v0.7.5
80%
v0.4.1
11%
v0.3.3
6%
v0.2.4
2%
v0.8.0-rc.4
0%

Release Timeline

27 releases4 yankedsince 2020
J
F
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A
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J
J
A
S
O
N
D
2020
1
2021
9
2022
5
2023
6
2024
3
2025
3
2026
Less
More|
Yanked

Feature Flags

pemstdalloczeroize

README

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Maintainers

Dependencies
6
direct dependencies
Dependents
568
crates depend on pkcs1

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