RustCrypto/formats

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Cryptography-related format encoders/decoders: DER, PEM, PKCS, PKIX

Stars: 338
Forks: 188
Open beginner issues: 0
Indexed issues: 53
Avg merge: 4d 6h
Merged PRs (30d): 15

Dominant language: Rust
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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53 open issues indexed

Tracking issue for `cms` v0.3.0 release Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

RustCrypto/formats#2430 · 1 reaction · Opened Sep 18, 2026
x509-cert - GeneralSubtree - distinguish absent minimum from explicitly encoded DEFAULT 0 Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

RustCrypto/formats#2428 · 1 comment · Opened Sep 17, 2026
Release a new version of `cmpv2` with fixed PollRepContent Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

RustCrypto/formats#2427 · 1 comment · Opened Sep 15, 2026
Unable to build certificate with P384 from version 0.3.0 Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

RustCrypto/formats#2403 · 2 comments · Opened Aug 13, 2026
IssuingDistributionPoint has the wrong AssociatedOid (id-pe-subjectInfoAccess) Open

Difficulty 1/5 1-3 hours Newbie friendliness 86/100

RustCrypto/formats#2389 · 1 comment · Opened Aug 2, 2026
pkcs12: blockers for 0.2.0 Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

RustCrypto/formats#2387 · 9 comments · Opened Aug 1, 2026
pkcs1: blockers for v0.8.0 release? Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

RustCrypto/formats#2385 · 1 comment · Opened Jul 23, 2026
Referenced README.md in x509-cert/test-support/Cargo.toml does not exist Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

RustCrypto/formats#2366 · Opened Jul 3, 2026
Simd backends for encoders/decoders Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#2358 · 1 comment · Opened Jun 27, 2026
x509-cert: support alternative `SubjectKeyIdentifier` methods (RFC 7093) Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

RustCrypto/formats#2347 · Opened Jun 15, 2026
`base64ct::Encoder` with alloc? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#2321 · 2 comments · Opened Apr 29, 2026
Relax `Encoding::encode_string`'s limit to `usize::MAX/4 * 3`? Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

RustCrypto/formats#2320 · 2 comments · Opened Apr 29, 2026
pkcs8: better `no_alloc` support for `DecodePrivateKey`/`EncodePrivateKey` traits Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

RustCrypto/formats#2307 · 2 comments · Opened Apr 25, 2026
ISO7816-4: apdu der-like Encode/Decode crate Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#2211 · Opened Feb 9, 2026
Is there a way to add an unsigned value after the signature ? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

RustCrypto/formats#2060 · 1 comment · Opened Oct 8, 2025
tai64: time is wrong in different ways Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#2012 · 1 comment · Opened Aug 25, 2025
cms builders: infallible methods with `Result<_>` return type Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#1989 · 1 reaction · Opened Aug 7, 2025
cms builders: how can I surface signing errors? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#1987 · 1 comment · Opened Aug 7, 2025
der: make `Length` a newtype of `usize` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

RustCrypto/formats#1954 · 4 comments · Opened Jul 19, 2025
der: Error stacktraces Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#1951 · 6 comments · 1 reaction · Opened Jul 18, 2025
der: add `ClarifyWriter` Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#1835 · 1 comment · Opened May 12, 2025
der: derive(Choice) needs `constructed = "true"` flag Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

RustCrypto/formats#1808 · Opened May 5, 2025
der: use Cow for *Ref types Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

RustCrypto/formats#1795 · 4 comments · Opened May 2, 2025
der: drop `Encode`, `Decode`, `Tagged` traits requirements for `IMPLICIT` Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

RustCrypto/formats#1746 · Opened Mar 28, 2025
der: drop `EncodeValue`, `DecodeValue` trait requirements for `EXPLICIT` Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

RustCrypto/formats#1745 · Opened Mar 28, 2025
der: Move `error.position` from Error to Reader Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

RustCrypto/formats#1719 · 5 comments · Opened Mar 14, 2025
Builder feature on no-std and no getrandom supported targets Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

RustCrypto/formats#1697 · 4 comments · Opened Mar 7, 2025
Inconsistency in leap seconds Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

RustCrypto/formats#1618 · 3 comments · Opened Dec 5, 2024
pkcs1 crate has no examples, no obvious way of using Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

RustCrypto/formats#1611 · 2 comments · Opened Nov 27, 2024
Sec1 round-trip fails with AlgorithmParametersMissing Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

RustCrypto/formats#1610 · 2 comments · Opened Nov 27, 2024
x509-cert: Changelog is empty for `0.3.0-pre.0` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

RustCrypto/formats#1605 · 1 comment · Opened Nov 4, 2024
spki: Document how to convert between `SubjectPublicKeyInfoRef` (or owned) and e.g. `p256::PublicKey` Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

RustCrypto/formats#1604 · 2 comments · Opened Nov 3, 2024
x509-cert: support parsing X.509 certificates with no allocations Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

RustCrypto/formats#1603 · 16 comments · 1 reaction · Opened Nov 3, 2024
CertificateBuilder running example Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

RustCrypto/formats#1580 · 2 comments · 1 reaction · Opened Oct 21, 2024
CSR builder discoverability Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

RustCrypto/formats#1577 · 1 comment · Opened Oct 18, 2024
x509-cert: Document (or improve) how to construct `Name` Open

enhancement

RustCrypto/formats#1489 · 1 comment · 1 assignee · Opened Sep 1, 2024
cms: `TagUnexpected` error, but works fine in OpenSSL Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

RustCrypto/formats#1452 · 7 comments · Opened Jul 25, 2024
oiddbgen: parse types aliased to OBJECT IDENTIFIER Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

RustCrypto/formats#1323 · 2 comments · Opened Jan 10, 2024
base32ct: add crockford alphabet Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

RustCrypto/formats#1246 · 2 comments · Opened Nov 1, 2023
cms: Encrypt, Decrypt, or Verify Functions Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

RustCrypto/formats#1204 · 2 comments · Opened Aug 23, 2023
x509-cert: How to use dynamic signer with Builder? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

RustCrypto/formats#1160 · 7 comments · Opened Jul 20, 2023
Tracking issue for generic (e.g. key) types and owned/ref aliases Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

RustCrypto/formats#1117 · 5 comments · Opened Jun 25, 2023
der: Add `serde` integration for types in `asn1` module. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

RustCrypto/formats#1085 · 2 reactions · Opened May 29, 2023
der: unified generic `*String`/`*StringRef` types Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

RustCrypto/formats#1061 · Opened May 13, 2023
x509-cert: certificate verification support Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

RustCrypto/formats#838 · 9 comments · 2 reactions · Opened Jan 4, 2023
base64ct: decode benchmark does not work Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

RustCrypto/formats#721 · Opened Sep 15, 2022
x509-cert: Creating x509 certificates without allocations Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

RustCrypto/formats#689 · 27 comments · Opened Jul 25, 2022
Question on decoding large data structures Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

RustCrypto/formats#576 · 3 comments · Opened Apr 4, 2022
tls_codec performance Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

RustCrypto/formats#254 · 1 comment · Opened Nov 23, 2021
tls_codec: Add function to ensure all bytes have been consumed Open

question

RustCrypto/formats#219 · 1 comment · 1 assignee · Opened Nov 15, 2021

RustCrypto/formats

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