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 Specificationspkcs5]: Password-Based Cryptography Specificationpkcs7]: Cryptographic Message Syntaxpkcs8]: Private-Key Information Syntax Specificationpkcs10]: Certification Request Syntax Specificationsec1]: Elliptic Curve Cryptographyspki]: X.509 Subject Public Key Infox501]: Directory Services Typesx509]: Public Key Infrastructure CertificateThe core implementation avoids any heap usage (with convenience methods
that allocate gated under the off-by-default alloc feature).
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.
no_std friendly: supports "heapless" usagealloc and std if desiredno_std friendly:
const-oid: const-friendly OID implementationpem-rfc7468: PKCS/PKIX-flavored PEM library with constant-time decoder/encoderstime crate: date/time libraryThis crate requires Rust 1.65 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.