https://github.com/soenneker/soenneker.hashing.slhdsa

A utility library for SLH-DSA post-quantum hashing and verification
https://github.com/soenneker/soenneker.hashing.slhdsa

csharp dotnet dsa encrypt hash hashing key post-quantum private public slh slhdsa slhdsahashingutil util

Last synced: about 2 months ago
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A utility library for SLH-DSA post-quantum hashing and verification

• Host: GitHub
• URL: https://github.com/soenneker/soenneker.hashing.slhdsa
• Owner: soenneker
• License: mit
• Created: 2024-12-10T14:11:08.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2025-04-12T22:53:00.000Z (2 months ago)
• Last Synced: 2025-04-14T23:07:56.503Z (about 2 months ago)
• Topics: csharp, dotnet, dsa, encrypt, hash, hashing, key, post-quantum, private, public, slh, slhdsa, slhdsahashingutil, util
• Language: C#
• Homepage: https://soenneker.com
• Size: 373 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE

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# ![](https://user-images.githubusercontent.com/4441470/224455560-91ed3ee7-f510-4041-a8d2-3fc093025112.png) Soenneker.Hashing.Slhdsa

### A utility library for SLH-DSA post-quantum hashing and verification

A compact and lightweight library for **SLH-DSA (Stateless Hash-Based Digital Signature Algorithm)**, a post-quantum cryptographic standard providing robust security against classical and quantum attacks. SLH-DSA uses hash-based cryptography to ensure secure key generation, message signing, and signature verification.

## Features

- Generate **SLH-DSA key pairs**.

- Sign and verify messages.

- Supports multiple parameter sets (e.g., SHAKE-128F, SHA2-128F).

- Thread-safe supporting concurrency.

- Tests included.

## Installation

```

dotnet add package Soenneker.Hashing.Slhdsa

```

## Usage

### 1. Generate a public and private key pair

```csharp

(string privateKey, string publicKey) = SlhDsaHashingUtil.GenerateKeyPair(); // Keys are Base64 strings

```

### 2. Sign the payload with the private key

```csharp

string signature = SlhDsaHashingUtil.SignMessage("Hello, SLH-DSA!", privateKey); // Signaure is a Base64 string

```

### 3. Verify the signature with the public key

```csharp

bool isValid = SlhDsaHashingUtil.VerifySignature("Hello, SLH-DSA!", signature, publicKey);

```

### How to specify the optional parameter set:

```csharp

var parameterSet = SlhDsaParameterType.SLH_DSA_SHAKE_128F;

(string privateKey, string publicKey) = SlhDsaHashingUtil.GenerateKeyPair(parameterSet);

string signature = SlhDsaHashingUtil.SignMessage("Hello, SLH-DSA!", privateKey, parameterSet);

bool isValid = SlhDsaHashingUtil.VerifySignature("Hello, SLH-DSA!", signature, publicKey, parameterSet);

```