flexiber

Encoding and decoding of BER-TLV as described in ISO 7816-4, without allocations.

Follows the approach taken in der, and then in simple-tlv.

License

^{flexiber is licensed under either of Apache License, Version 2.0 or MIT License 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.}

lib.rs:

flexiber

Implementation of the BER-TLV serialization format from ISO 7816-4:2005.

ITU-T X.690 (08/2015) defines the BER, CER and DER encoding rules for ASN.1

The exact same document is ISO/IET 8825-1, which is freely available, inconveniently packed as a single PDF in a ZIP file :)

Credits

This library is a remix of RustCrypto/utils/der.

The core idea taken from der is to have Encodable require an encoded_length method. By calling this recursively in a first pass, allocations required in other approaches are avoided.