https://github.com/fraunhofer-aisec/hbs-lms-rust
Pure Rust implementation of the Leighton Micali Signature scheme.
https://github.com/fraunhofer-aisec/hbs-lms-rust
cryptography hash-based-signatures lms post-quantum rust signature
Last synced: 3 months ago
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Pure Rust implementation of the Leighton Micali Signature scheme.
- Host: GitHub
- URL: https://github.com/fraunhofer-aisec/hbs-lms-rust
- Owner: Fraunhofer-AISEC
- License: apache-2.0
- Created: 2021-10-15T13:15:13.000Z (almost 4 years ago)
- Default Branch: master
- Last Pushed: 2025-04-18T12:28:25.000Z (6 months ago)
- Last Synced: 2025-06-08T14:44:35.970Z (4 months ago)
- Topics: cryptography, hash-based-signatures, lms, post-quantum, rust, signature
- Language: Rust
- Homepage: https://crates.io/crates/hbs-lms
- Size: 926 KB
- Stars: 12
- Watchers: 5
- Forks: 9
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Leighton-Micali Hash-Based Signatures
[![crate][crate-image]][crate-link]
[![Docs][docs-image]][docs-link]
![Apache2/MIT licensed][license-image]
![Rust Version][rustc-image]
[![Build Status][build-image]][build-link]
LMS implementation in Rust according to the [IETF RFC 8554](https://datatracker.ietf.org/doc/html/rfc8554).
This implementation is binary compatible with the reference implementation found here: [hash-sigs](https://github.com/cisco/hash-sigs).
This crate does not require the standard library (i.e. no_std capable) and can be easily used for bare-metal programming.
## Demo
A demo application is located in the `examples` folder to demonstrate the use of the library.
This demo application can be used in the console as follows:
```
# Key generation
# Generates `mykey.prv`, `mykey.pub` with merkle tree height 10 and winternitz parameter 2
cargo run --release --example lms-demo -- genkey mykey 10/2 --seed 0123456701234567012345670123456701234567012345670123456701234567
# Signing
# Generates `message.txt.sig`
cargo run --release --example lms-demo -- sign mykey message.txt
# Signing (fast_verification)
# Generates `message.txt_mut`, `message.txt_mut.sig`
HBS_LMS_MAX_HASH_OPTIMIZATIONS=1000 HBS_LMS_THREADS=2 cargo run --release --example lms-demo \
--features fast_verify -- sign_mut mykey message.txt
# Verification
# Verifies `message.txt` with `message.txt.sig` against `mykey.pub`
cargo run --release --example lms-demo -- verify mykey message.txt
```
## Naming conventions wrt to the IETF RFC
The naming in the RFC is done by using a single character.
To allow for a better understanding of the implementation, we have decided to use more descriptive designations.
The following table shows the mapping between the RFC and the library naming including a short description.
| RFC Naming | Library Naming | Meaning |
|------------|----------------------|-----------------------------------------------------------|
| I | lms_tree_identifier | 16-byte random value to identify a single LMS tree |
| q | lms_leaf_identifier | 4-byte value to identify all leafs in a single LMS tree |
| C | signature_randomizer | 32-byte random value added to every signature |
| Q | message_hash | Output of hashed message together with I, q, D_MESG and C |
| y | signature_data | The actual data of the signature |
| p | hash_chain_count | The number of hash chains for a certain W parameter |
| ls | checksum_left_shift | How many bits the checksum is shifted into the coef-value |
| n | hash_function_output_size | Number of bytes that the lm_ots hash functions generates |
| m | hash_function_output_size | Number of bytes that the lms hash functions generates |
## Minimum Supported Rust Version
The crate in this repository supports Rust **1.63** or higher.
Minimum supported Rust version can be changed in the future, but it will be done with a minor version bump.
## Licensing
This work is licensed under terms of the Apache-2.0 license (see [LICENSE file](LICENSE)).
### Contribution
Any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.
[//]: # (badges)
[crate-image]: https://img.shields.io/crates/v/hbs-lms.svg
[crate-link]: https://crates.io/crates/hbs-lms
[docs-image]: https://docs.rs/hbs-lms/badge.svg
[docs-link]: https://docs.rs/hbs-lms/
[license-image]: https://img.shields.io/badge/license-Apache2.0-blue.svg
[rustc-image]: https://img.shields.io/badge/rustc-1.63+-blue.svg
[build-image]: https://github.com/Fraunhofer-AISEC/hbs-lms-rust/workflows/lms/badge.svg?branch=master
[build-link]: https://github.com/Fraunhofer-AISEC/hbs-lms-rust/actions?query=workflow%3Alms