Notes on the use of OpenSSL.Net (4)

ECDSA signature algorithm

• ECDSA

 1 class Program_ECDSA
 2     {
 3         static void Main(string[] args)
 4         {
 5             byte[] messageBytes = Encoding.UTF8.GetBytes("ECDSA签名。");
 6 
 7             byte[] signBytes = Sign(privateKey, messageBytes);
 8             bool result = Verify(publicKey, messageBytes, signBytes);
 9             Console.WriteLine(result);
10 
11             signBytes = Sign512(privateKey, messageBytes);
12             result = Verify512(publicKey, messageBytes, signBytes);
13             Console.WriteLine(result);
14             Console.ReadKey();
15         }
16 
17         static string privateKey = @"-----BEGIN EC PARAMETERS-----
18 BgUrgQQAIw==
19 -----END EC PARAMETERS-----
20 -----BEGIN EC PRIVATE KEY-----
21 MIHcAgEBBEIAzb3CKEl2y87Q1dbqiOCG0UkBceI9V5nA4N0vXZx7xgJTHtfHCe9S
22 y/72GTZk7PQw89aTU7fdQl2NRC2hYiP2O1WgBwYFK4EEACOhgYkDgYYABAEwtG7T
23 5cGCineqYs3VPHdadOJgIwD0BGkuSEOWt3RD11S5OiBpY0bVYkYHKvySZYPfvFIW
24 EZOTNyNue3JZ0ubWzQDWHULl/P9t8LZrPrIMC43sHuoHDV0BhcsO/HUWKU9QBCYh
25 S++px6BwYrNoFaenJoHOVtDs8veqH1aAAQW1Mbb56A==
26 -----END EC PRIVATE KEY-----
27 ";
28 
29         static string publicKey = @"-----BEGIN PUBLIC KEY-----
30 MIGbMBAGByqGSM49AgEGBSuBBAAjA4GGAAQBMLRu0+XBgop3qmLN1Tx3WnTiYCMA
31 9ARpLkhDlrd0Q9dUuTogaWNG1WJGByr8kmWD37xSFhGTkzcjbntyWdLm1s0A1h1C
32 5fz/bfC2az6yDAuN7B7qBw1dAYXLDvx1FilPUAQmIUvvqcegcGKzaBWnpyaBzlbQ
33 7PL3qh9WgAEFtTG2+eg=
34 -----END PUBLIC KEY-----
35 ";
36 
37         public static byte[] Sign(string privateKey, byte[] messageBytes)
38         {
39             using (CryptoKey cryptoKey = CryptoKey.FromPrivateKey(privateKey, null))
40             {
41                 using (MessageDigestContext hashDigest = new MessageDigestContext(MessageDigest.ECDSA))
42                 {
43                     byte[] hashBytes = hashDigest.Digest(messageBytes);
44                     return hashDigest.Sign(messageBytes, cryptoKey);
45                 }
46             }
47         }
48 
49         public static bool Verify(string publicKey, byte[] messageBytes, byte[] signBytes)
50         {
51             using (CryptoKey cryptoKey = CryptoKey.FromPublicKey(publicKey, null))
52             {
53                 using (MessageDigestContext hashDigest = new MessageDigestContext(MessageDigest.ECDSA))
54                 {
55                     byte[] hashBytes = hashDigest.Digest(messageBytes);
56                     return hashDigest.Verify(messageBytes, signBytes, cryptoKey);
57                 }
58             }
59         }
60 
61         public static byte[] Sign512(string privateKey, byte[] messageBytes)
62         {
63             using (CryptoKey cryptoKey = CryptoKey.FromPrivateKey(privateKey, null))
64             {
65                 using (MessageDigestContext hashDigest = new MessageDigestContext(MessageDigest.SHA512))
66                 {
67                     byte[] hashBytes = hashDigest.Digest(messageBytes);
68                     return hashDigest.Sign(messageBytes, cryptoKey);
69                 }
70             }
71         }
72 
73         public static bool Verify512(string publicKey, byte[] messageBytes, byte[] signBytes)
74         {
75             using (CryptoKey cryptoKey = CryptoKey.FromPublicKey(publicKey, null))
76             {
77                 using (MessageDigestContext hashDigest = new MessageDigestContext(MessageDigest.SHA512))
78                 {
79                     byte[] hashBytes = hashDigest.Digest(messageBytes);
80                     return hashDigest.Verify(messageBytes, signBytes, cryptoKey);
81                 }
82             }
83         }
84 
85     }