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base16ct

1.0.0253M downloads/moRustCrypto/formats ↗New releases in your daily digest, changelog included.

Pure Rust implementation of Base16 a.k.a hexadecimal (RFC 4648) which avoids any usages of data-dependent branches/LUTs and thereby provides portable "best effort" constant-time operation and embedded-friendly no_std support

Last release 9 months ago
03 Jan 2026
Ships fairly regularly
a new release about every 1.1 years
Nearly every release is documented
notes for 5 of 5 stable releases
1 version withdrawn
withdrawn after publishing
5 years old
6 releases · first in 2022

Release timeline

6 releases since 2022

20222023

Releases

1.0.03 Jan 20262 sources agree
Switch from doc_auto_cfg to doc_cfg ([#2072])
Fixed

Switch from doc_auto_cfg to doc_cfg (#2072)
Open source →
0.3.020 Aug 20252 sources agree
Upgrade to 2024 edition; MSRV 1.85 ([#1670])
Changed

Upgrade to 2024 edition; MSRV 1.85 (#1670)

Use core::error:Error (#1842)

Removed

std feature (#2004)
Open source →

From the same repository

RustCrypto/formats

const-oidcrates.ioConst-friendly implementation of the ISO/IEC Object Identifier (OID) standard as defined in ITU X.660, with support for BER/DER encoding/decoding as well as heapless no_std (i.e. embedded) support
dercrates.ioPure Rust embedded-friendly implementation of the Distinguished Encoding Rules (DER) for Abstract Syntax Notation One (ASN.1) as described in ITU X.690 with full support for heapless `no_std`/`no_alloc` targets
spkicrates.ioX.509 Subject Public Key Info (RFC5280) describing public keys as well as their associated AlgorithmIdentifiers (i.e. OIDs)
pkcs8crates.ioPure Rust implementation of Public-Key Cryptography Standards (PKCS) #8: Private-Key Information Syntax Specification (RFC 5208), with additional support for PKCS#8v2 asymmetric key packages (RFC 5958)
base64ct

2024

2025

2026

20222026

One column per quarter.

▸▾0.2.026 Feb 20232 sources agree

[#802]: https://github.com/RustCrypto/formats/pull/802 [#824]: https://github.com/RustCrypto/formats/pull/824

Changed

MSRV 1.60 (#802)
Lint improvements (#824)

Open source →

▸▾0.1.115 Jan 20222 sources agree

[#329]: https://github.com/RustCrypto/formats/pull/329

Added

HexDisplay type (#329)

Open source →

▸▾0.1.013 Jan 20222 sources agree

- Initial release

Initial release

Open source →

▸▾0.0.011 Jan 2022withdrawn

Nothing published for this version

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crates.io

Pure Rust implementation of Base64 (RFC 4648) which avoids any usages of data-dependent branches/LUTs and thereby provides portable "best effort" constant-time operation and embedded-friendly no_std support

pem-rfc7468crates.ioPEM Encoding (RFC 7468) for PKIX, PKCS, and CMS Structures, implementing a strict subset of the original Privacy-Enhanced Mail encoding intended specifically for use with cryptographic keys, certificates, and other messages. Provides a no_std-friendly, constant-time implementation suitable for use with cryptographic private keys.

sec1crates.ioPure Rust implementation of SEC1: Elliptic Curve Cryptography encoding formats including ASN.1 DER encoded private keys as well as the Elliptic-Curve-Point-to-Octet-String encoding

pkcs1crates.ioPure Rust implementation of Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.2 (RFC 8017)