OpenSSL.Net使用随记（四）

ECDSA签名算法

• ECDSA

class Program_ECDSA
    {
        static void Main(string[] args)
        {
            byte[] messageBytes = Encoding.UTF8.GetBytes("ECDSA签名。");

            byte[] signBytes = Sign(privateKey, messageBytes);
            bool result = Verify(publicKey, messageBytes, signBytes);
            Console.WriteLine(result);

            signBytes = Sign512(privateKey, messageBytes);
            result = Verify512(publicKey, messageBytes, signBytes);
            Console.WriteLine(result);
            Console.ReadKey();
        }

        static string privateKey = @"-----BEGIN EC PARAMETERS-----
BgUrgQQAIw==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MIHcAgEBBEIAzb3CKEl2y87Q1dbqiOCG0UkBceI9V5nA4N0vXZx7xgJTHtfHCe9S
y/72GTZk7PQw89aTU7fdQl2NRC2hYiP2O1WgBwYFK4EEACOhgYkDgYYABAEwtG7T
5cGCineqYs3VPHdadOJgIwD0BGkuSEOWt3RD11S5OiBpY0bVYkYHKvySZYPfvFIW
EZOTNyNue3JZ0ubWzQDWHULl/P9t8LZrPrIMC43sHuoHDV0BhcsO/HUWKU9QBCYh
S++px6BwYrNoFaenJoHOVtDs8veqH1aAAQW1Mbb56A==
-----END EC PRIVATE KEY-----
";

        static string publicKey = @"-----BEGIN PUBLIC KEY-----
MIGbMBAGByqGSM49AgEGBSuBBAAjA4GGAAQBMLRu0+XBgop3qmLN1Tx3WnTiYCMA
9ARpLkhDlrd0Q9dUuTogaWNG1WJGByr8kmWD37xSFhGTkzcjbntyWdLm1s0A1h1C
5fz/bfC2az6yDAuN7B7qBw1dAYXLDvx1FilPUAQmIUvvqcegcGKzaBWnpyaBzlbQ
7PL3qh9WgAEFtTG2+eg=
-----END PUBLIC KEY-----
";

        public static byte[] Sign(string privateKey, byte[] messageBytes)
        {
            using (CryptoKey cryptoKey = CryptoKey.FromPrivateKey(privateKey, null))
            {
                using (MessageDigestContext hashDigest = new MessageDigestContext(MessageDigest.ECDSA))
                {
                    byte[] hashBytes = hashDigest.Digest(messageBytes);
                    return hashDigest.Sign(messageBytes, cryptoKey);
                }
            }
        }

        public static bool Verify(string publicKey, byte[] messageBytes, byte[] signBytes)
        {
            using (CryptoKey cryptoKey = CryptoKey.FromPublicKey(publicKey, null))
            {
                using (MessageDigestContext hashDigest = new MessageDigestContext(MessageDigest.ECDSA))
                {
                    byte[] hashBytes = hashDigest.Digest(messageBytes);
                    return hashDigest.Verify(messageBytes, signBytes, cryptoKey);
                }
            }
        }

        public static byte[] Sign512(string privateKey, byte[] messageBytes)
        {
            using (CryptoKey cryptoKey = CryptoKey.FromPrivateKey(privateKey, null))
            {
                using (MessageDigestContext hashDigest = new MessageDigestContext(MessageDigest.SHA512))
                {
                    byte[] hashBytes = hashDigest.Digest(messageBytes);
                    return hashDigest.Sign(messageBytes, cryptoKey);
                }
            }
        }

        public static bool Verify512(string publicKey, byte[] messageBytes, byte[] signBytes)
        {
            using (CryptoKey cryptoKey = CryptoKey.FromPublicKey(publicKey, null))
            {
                using (MessageDigestContext hashDigest = new MessageDigestContext(MessageDigest.SHA512))
                {
                    byte[] hashBytes = hashDigest.Digest(messageBytes);
                    return hashDigest.Verify(messageBytes, signBytes, cryptoKey);
                }
            }
        }

    }