Signature

 

 public class ECDSAClass
    {
        internal static CngKey aliceKeySignature;

        internal static byte[] alicePubKeyBlob;

        /// 

        /// 主调度方法，数字签名
        /// 
        public static void MShow()
        {
            CreateKeys();
            byte[] aliceData = Encoding.UTF8.GetBytes("Alice");
            byte[] aliceSignature = CreateSignature(aliceData, aliceKeySignature);
            Console.WriteLine("Alice created signature:{0}", Convert.ToBase64String(aliceSignature));
            if (VerifySignature(aliceData, aliceSignature, alicePubKeyBlob))
            {
                Console.WriteLine("Alice signature verified successfully");
            }
        }

        //验证数据
        private static bool VerifySignature(byte[] data, byte[] aliceSignature, byte[] pubkey)
        {
            bool retvalue = false;
            using (CngKey key = CngKey.Import(pubkey, CngKeyBlobFormat.GenericPublicBlob))
            {
                var signingAlg = new ECDsaCng(key);
                retvalue = signingAlg.VerifyData(data, aliceSignature);
                signingAlg.Clear();
            }
            return retvalue; 
        }

        //加密数据
        private static byte[] CreateSignature(byte[] data, CngKey key)
        {
            var signingAlg = new ECDsaCng(key);
            byte[] signature = signingAlg.SignData(data);
            signingAlg.Clear();
            return signature;
        }

        /// 

        /// 创建密钥
        /// 
        private static void CreateKeys()
        {
            //创建密钥
            aliceKeySignature = CngKey.Create(CngAlgorithm.ECDsaP256);
            //导出公钥
            alicePubKeyBlob = aliceKeySignature.Export(CngKeyBlobFormat.GenericPublicBlob);

        }