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verifyEd25519

Certificate.verifyEd25519

fn verifyEd25519(
    message: []const u8,
    encoded_sig: []const u8,
    pub_key_algo: Parsed.PubKeyAlgo,
    encoded_pub_key: []const u8,
) !void

File

lib/std/crypto/Certificate.zig:840

Code

fn verifyEd25519(
    message: []const u8,
    encoded_sig: []const u8,
    pub_key_algo: Parsed.PubKeyAlgo,
    encoded_pub_key: []const u8,
) !void {
    if (pub_key_algo != .curveEd25519) return error.CertificateSignatureAlgorithmMismatch;
    const Ed25519 = crypto.sign.Ed25519;
    if (encoded_sig.len != Ed25519.Signature.encoded_length) return error.CertificateSignatureInvalid;
    const sig = Ed25519.Signature.fromBytes(encoded_sig[0..Ed25519.Signature.encoded_length].*);
    if (encoded_pub_key.len != Ed25519.PublicKey.encoded_length) return error.CertificateSignatureInvalid;
    const pub_key = Ed25519.PublicKey.fromBytes(encoded_pub_key[0..Ed25519.PublicKey.encoded_length].*) catch |err| switch (err) {
        error.NonCanonical => return error.CertificateSignatureInvalid,
    };
    sig.verify(message, pub_key) catch |err| switch (err) {
        error.IdentityElement => return error.CertificateSignatureInvalid,
        error.NonCanonical => return error.CertificateSignatureInvalid,
        error.SignatureVerificationFailed => return error.CertificateSignatureInvalid,
        error.InvalidEncoding => return error.CertificateSignatureInvalid,
        error.WeakPublicKey => return error.CertificateSignatureInvalid,
    };
}