https://github.com/jedisct1/zig-eddsa-key-blinding

A Zig implementation of EdDSA signatures with blind keys.
https://github.com/jedisct1/zig-eddsa-key-blinding

blinding ed25519 eddsa zig zig-package

Last synced: 4 months ago
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A Zig implementation of EdDSA signatures with blind keys.

• Host: GitHub
• URL: https://github.com/jedisct1/zig-eddsa-key-blinding
• Owner: jedisct1
• License: mit
• Created: 2022-01-20T21:42:36.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2023-07-15T18:57:27.000Z (over 1 year ago)
• Last Synced: 2024-10-05T04:35:52.976Z (4 months ago)
• Topics: blinding, ed25519, eddsa, zig, zig-package
• Language: Zig
• Homepage:
• Size: 4.88 KB
• Stars: 16
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# EdDSA signatures with blind keys

A Zig implementation of the [EdDSA key blinding](https://chris-wood.github.io/draft-wood-cfrg-eddsa-blinding/draft-wood-cfrg-eddsa-blinding.html) proposal.

```zig

    // Create a standard Ed25519 key pair

    const kp = try Ed25519.KeyPair.create(null);

    // Create a random blinding seed

    var blind: [32]u8 = undefined;

    crypto.random.bytes(&blind);

    // Blind the key pair

    const blind_kp = try BlindEd25519.blind(kp, blind);

    // Sign a message and check that it can be verified with the blind public key

    const msg = "test";

    const sig = try BlindEd25519.sign(msg, blind_kp, null);

    try Ed25519.verify(sig, msg, blind_kp.blind_public_key);

    // Unblind the public key

    const pk = try BlindEd25519.unblind_public_key(blind_kp.blind_public_key, blind);

    try std.testing.expectEqualSlices(u8, &pk, &kp.public_key);

```