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Changed ed25519 constants names to better align with the stlib implementation and made the generateKeys's function pubkey argument optional to spare a useless memcpy when possible

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Gu://em_ 2026-07-20 00:09:23 +02:00
parent 4a267c135c
commit 856f4f626b
1 changed files with 12 additions and 12 deletions
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24
src/crypto/ed25519.zig
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@ -5,37 +5,37 @@ const Ed25519 = @import("std").crypto.sign.Ed25519;
// Random number generation // Random number generation
const rngProvider = @import("random.zig").Implementation; const rngProvider = @import("random.zig").Implementation;
pub const secret_key_size: comptime_int = Ed25519.SecretKey.encoded_length; pub const secret_key_length: comptime_int = Ed25519.SecretKey.encoded_length;
pub const public_key_size: comptime_int = Ed25519.PublicKey.encoded_length; pub const public_key_length: comptime_int = Ed25519.PublicKey.encoded_length;
pub const signature_size : comptime_int = Ed25519.Signature.encoded_length; pub const signature_length : comptime_int = Ed25519.Signature.encoded_length;
pub const seed_length : comptime_int = Ed25519.Signature.encoded_length;
pub const Implementation = struct { pub const Implementation = struct {
generateKeys: *const fn (pubkey_buffer: *[public_key_size]u8, privkey_buffer: *[secret_key_size]u8, rng: rngProvider) CryptoError!void, generateKeys: *const fn (pubkey_buffer: ?*[public_key_length]u8, privkey_buffer: *[secret_key_length]u8, rng: rngProvider) CryptoError!void,
sign: *const fn (key: *const [secret_key_size]u8, data: []const u8, signature_out: *const [signature_size]u8) CryptoError!void, sign: *const fn (key: *const [secret_key_length]u8, data: []const u8, signature_out: *const [signature_length]u8) CryptoError!void,
verify: *const fn (key: *const [public_key_size]u8, signature: *const [signature_size]u8, data: []const u8) CryptoError!void, verify: *const fn (key: *const [public_key_length]u8, signature: *const [signature_length]u8, data: []const u8) CryptoError!void,
}; };
pub fn generateKeys(pubkey_buffer: *[public_key_size]u8, privkey_buffer: *[secret_key_size]u8, rng: rngProvider) !void { pub fn generateKeys(pubkey_buffer: ?*[public_key_length]u8, privkey_buffer: *[secret_key_length]u8, rng: rngProvider) !void {
var seed_buffer: [Ed25519.KeyPair.seed_length]u8 = undefined; var seed_buffer: [Ed25519.KeyPair.seed_length]u8 = undefined;
rng.generate(&seed_buffer); rng.generate(&seed_buffer);
const keypair: Ed25519.KeyPair = Ed25519.KeyPair.generateDeterministic(seed_buffer) catch return CryptoError.FailedKeyGeneration; const keypair: Ed25519.KeyPair = Ed25519.KeyPair.generateDeterministic(seed_buffer) catch return CryptoError.FailedKeyGeneration;
if (pubkey_buffer != null) @memcpy(pubkey_buffer.?[0..public_key_length], &keypair.public_key.bytes);
@memcpy(pubkey_buffer[0..public_key_size], &keypair.public_key.bytes); @memcpy(privkey_buffer[0..secret_key_length], &keypair.secret_key.bytes);
@memcpy(privkey_buffer[0..secret_key_size], &keypair.secret_key.bytes);
} }
pub fn sign(key: *const [secret_key_size]u8, data: []const u8, signature_out: *const [signature_size]u8) !void { pub fn sign(key: *const [secret_key_length]u8, data: []const u8, signature_out: *const [signature_length]u8) !void {
_ = key; _ = key;
_ = data; _ = data;
_ = signature_out; _ = signature_out;
return CryptoError.NotImplemented; return CryptoError.NotImplemented;
} }
pub fn verify(key: *const [public_key_size]u8, signature: *const [signature_size]u8, data: []const u8) !void { pub fn verify(key: *const [public_key_length]u8, signature: *const [signature_length]u8, data: []const u8) !void {
// TODO maybe find a more efficient way to do that (excessive copies) // TODO maybe find a more efficient way to do that (excessive copies)
const sig = Ed25519.Signature.fromBytes(signature.*); const sig = Ed25519.Signature.fromBytes(signature.*);
const pubkey = Ed25519.PublicKey.fromBytes(key.*) catch return CryptoError.InvalidKey; const pubkey = Ed25519.PublicKey.fromBytes(key.*) catch return CryptoError.InvalidKey;