Uses new Rust 2021
|new 0.6.1||Dec 6, 2022|
|0.6.0||May 8, 2022|
|0.6.0-pre.3||Mar 14, 2022|
|0.5.1||Nov 17, 2021|
|0.1.0||Dec 22, 2020|
#538 in Cryptography
756,198 downloads per month
Used in 1,169 crates (23 directly)
RustCrypto: ASN.1 DER
Pure Rust embedded-friendly implementation of the Distinguished Encoding Rules (DER) for Abstract Syntax Notation One (ASN.1) as described in ITU X.690.
This crate provides a
no_std-friendly implementation of a subset of ASN.1 DER
necessary for decoding/encoding the following cryptography-related formats
implemented as crates maintained by the RustCrypto project:
pkcs1: RSA Cryptography Specifications
pkcs5: Password-Based Cryptography Specification
pkcs7: Cryptographic Message Syntax
pkcs8: Private-Key Information Syntax Specification
pkcs10: Certification Request Syntax Specification
sec1: Elliptic Curve Cryptography
spki: X.509 Subject Public Key Info
x501: Directory Services Types
x509: Public Key Infrastructure Certificate
The core implementation avoids any heap usage (with convenience methods
that allocate gated under the off-by-default
The DER decoder in this crate performs checks to ensure that the input document is in canonical form, and will return errors if non-canonical productions are encountered. There is currently no way to disable these checks.
- Rich support for ASN.1 types used by PKCS/PKIX documents
- Performs DER canonicalization checks at decoding time
no_stdfriendly: supports "heapless" usage
- Optionally supports
- No hard dependencies! Self-contained implementation with optional
integrations with the following crates, all of which are
const-oid: const-friendly OID implementation
pem-rfc7468: PKCS/PKIX-flavored PEM library with constant-time decoder/encoders
timecrate: date/time library
Minimum Supported Rust Version
This crate requires Rust 1.57 at a minimum.
We may change the MSRV in the future, but it will be accompanied by a minor version bump.
Licensed under either of:
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.