C# 常用的加密代碼參考
阿新 • • 發佈：2018-12-01
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1、MD5加密
1 public static string EncryptString(string source) 2 { 3 string result; 4 if (source == string.Empty || source == null) 5 { 6 result = string.Empty; 7 } 8 else 9 { 10 Encoding utf = newUTF8Encoding(); 11 byte[] bytes = utf.GetBytes(source); 12 MD5 md5 = new MD5CryptoServiceProvider(); 13 result = Convert.ToBase64String(md5.ComputeHash(bytes)); 14 } 15 return result; 16 }
2、 SHA_1加密
1 public static stringEncryptString(string source) 2 { 3 string result; 4 if (source == "" || source == string.Empty || source == null) 5 { 6 result = source; 7 } 8 else 9 { 10 Encoding utf = new UTF8Encoding();11 byte[] bytes = utf.GetBytes(source); 12 SHA1 sha = new SHA1CryptoServiceProvider(); 13 result = Convert.ToBase64String(sha.ComputeHash(bytes)); 14 } 15 return result; 16 }
3、對稱加密示例
1 private static readonly string key = "sajdkfj"; 2 3 private static readonly byte[] iv = new byte[] 4 { 5 7, 6 8, 7 9, 8 4, 9 5, 10 3, 11 2, 12 1 13 }; 14 15 public static string EncryptString(string source) 16 { 17 string result; 18 if (source == string.Empty || source == null) 19 { 20 result = source; 21 } 22 else 23 { 24 Encoding utf = new UTF8Encoding(); 25 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 26 ICryptoTransform encrpt = des.CreateEncryptor(utf.GetBytes(SymmetricEncryption.key), SymmetricEncryption.iv); 27 byte[] byteMessage = utf.GetBytes(source); 28 byte[] byteEncrpt = encrpt.TransformFinalBlock(byteMessage, 0, byteMessage.Length); 29 result = Convert.ToBase64String(byteEncrpt); 30 } 31 return result; 32 } 33 34 public static string DecryptString(string source) 35 { 36 Encoding utf = new UTF8Encoding(); 37 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 38 ICryptoTransform decrpt = des.CreateDecryptor(utf.GetBytes(SymmetricEncryption.key), SymmetricEncryption.iv); 39 byte[] byteEncrypt = Convert.FromBase64String(source); 40 byte[] byteDecrypt = decrpt.TransformFinalBlock(byteEncrypt, 0, byteEncrypt.Length); 41 return utf.GetString(byteDecrypt); 42 }
4、非對稱加密
1 public const string PUBLIC_KEY = "sdfasdfjsldkjfljLKjlkjaslkdj"; 2 3 public void RSAKey(out string privateKeys, out string publicKey) 4 { 5 RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); 6 privateKeys = rsa.ToXmlString(true); 7 publicKey = rsa.ToXmlString(false); 8 } 9 10 public string RSAEncrypt(string publicKey, string strEncryptString) 11 { 12 byte[] plainTextBArray = new UnicodeEncoding().GetBytes(strEncryptString); 13 return this.RSAEncrypt(publicKey, plainTextBArray); 14 } 15 16 public string RSAEncrypt(string publicKey, byte[] encryptString) 17 { 18 RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); 19 rsa.FromXmlString(publicKey); 20 int keySize = rsa.KeySize / 8; 21 int bufferSize = keySize - 11; 22 byte[] buffer = new byte[bufferSize]; 23 MemoryStream msInput = new MemoryStream(encryptString); 24 MemoryStream msOutput = new MemoryStream(); 25 for (int readLen = msInput.Read(buffer, 0, bufferSize); readLen > 0; readLen = msInput.Read(buffer, 0, bufferSize)) 26 { 27 byte[] dataToEnc = new byte[readLen]; 28 Array.Copy(buffer, 0, dataToEnc, 0, readLen); 29 byte[] encData = rsa.Encrypt(dataToEnc, false); 30 msOutput.Write(encData, 0, encData.Length); 31 } 32 msInput.Close(); 33 byte[] cypherTextBArray = msOutput.ToArray(); 34 msOutput.Close(); 35 rsa.Clear(); 36 return Convert.ToBase64String(cypherTextBArray); 37 } 38 39 public string RSADecrypt(string privateKey, string strDecryptString) 40 { 41 byte[] plainTextBArray = Convert.FromBase64String(strDecryptString); 42 return this.RSADecrypt(privateKey, plainTextBArray); 43 } 44 45 public string RSADecrypt(string privateKey, byte[] decryptString) 46 { 47 RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); 48 rsa.FromXmlString(privateKey); 49 int keySize = rsa.KeySize / 8; 50 byte[] buffer = new byte[keySize]; 51 MemoryStream msInput = new MemoryStream(decryptString); 52 MemoryStream msOutput = new MemoryStream(); 53 for (int readLen = msInput.Read(buffer, 0, keySize); readLen > 0; readLen = msInput.Read(buffer, 0, keySize)) 54 { 55 byte[] dataToDec = new byte[readLen]; 56 Array.Copy(buffer, 0, dataToDec, 0, readLen); 57 byte[] decData = rsa.Decrypt(dataToDec, false); 58 msOutput.Write(decData, 0, decData.Length); 59 } 60 msInput.Close(); 61 byte[] dypherTextBArray = msOutput.ToArray(); 62 msOutput.Close(); 63 rsa.Clear(); 64 return new UnicodeEncoding().GetString(dypherTextBArray); 65 } 66 67 public bool GetHash(string strSource, ref byte[] HashData) 68 { 69 HashAlgorithm MD5 = HashAlgorithm.Create("MD5"); 70 byte[] Buffer = Encoding.GetEncoding("GB2312").GetBytes(strSource); 71 HashData = MD5.ComputeHash(Buffer); 72 return true; 73 } 74 75 public string GetHash(string strSource) 76 { 77 HashAlgorithm MD5 = HashAlgorithm.Create("MD5"); 78 byte[] Buffer = Encoding.GetEncoding("GB2312").GetBytes(strSource); 79 byte[] HashData = MD5.ComputeHash(Buffer); 80 return Convert.ToBase64String(HashData); 81 } 82 83 public void SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, out byte[] EncryptedSignatureData) 84 { 85 RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 86 RSA.FromXmlString(p_strKeyPrivate); 87 RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA); 88 RSAFormatter.SetHashAlgorithm("MD5"); 89 EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); 90 } 91 92 public void SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, out string m_strEncryptedSignatureData) 93 { 94 RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 95 RSA.FromXmlString(p_strKeyPrivate); 96 RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA); 97 RSAFormatter.SetHashAlgorithm("MD5"); 98 byte[] EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); 99 m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData); 100 } 101 102 public void SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, out byte[] EncryptedSignatureData) 103 { 104 byte[] HashbyteSignature = Convert.FromBase64String(this.GetHash(m_strHashbyteSignature)); 105 RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 106 RSA.FromXmlString(p_strKeyPrivate); 107 RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA); 108 RSAFormatter.SetHashAlgorithm("MD5"); 109 EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); 110 } 111 112 public void SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, out string m_strEncryptedSignatureData) 113 { 114 byte[] HashbyteSignature = Convert.FromBase64String(this.GetHash(m_strHashbyteSignature)); 115 RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 116 RSA.FromXmlString(p_strKeyPrivate); 117 RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA); 118 RSAFormatter.SetHashAlgorithm("MD5"); 119 byte[] EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); 120 m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData); 121 } 122 123 public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, byte[] DeformatterData) 124 { 125 RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 126 RSA.FromXmlString(p_strKeyPublic); 127 RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA); 128 RSADeformatter.SetHashAlgorithm("MD5"); 129 return RSADeformatter.VerifySignature(HashbyteDeformatter, DeformatterData); 130 } 131 132 public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, byte[] DeformatterData) 133 { 134 byte[] HashbyteDeformatter = Convert.FromBase64String(this.GetHash(p_strHashbyteDeformatter)); 135 RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 136 RSA.FromXmlString(p_strKeyPublic); 137 RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA); 138 RSADeformatter.SetHashAlgorithm("MD5"); 139 return RSADeformatter.VerifySignature(HashbyteDeformatter, DeformatterData); 140 } 141 142 public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, string p_strDeformatterData) 143 { 144 RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 145 RSA.FromXmlString(p_strKeyPublic); 146 RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA); 147 RSADeformatter.SetHashAlgorithm("MD5"); 148 byte[] DeformatterData = Convert.FromBase64String(p_strDeformatterData); 149 return RSADeformatter.VerifySignature(HashbyteDeformatter, DeformatterData); 150 } 151 152 public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, string p_strDeformatterData) 153 { 154 byte[] HashbyteDeformatter = Convert.FromBase64String(this.GetHash(p_strHashbyteDeformatter)); 155 RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 156 RSA.FromXmlString(p_strKeyPublic); 157 RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA); 158 RSADeformatter.SetHashAlgorithm("MD5"); 159 byte[] DeformatterData = Convert.FromBase64String(p_strDeformatterData); 160 return RSADeformatter.VerifySignature(HashbyteDeformatter, DeformatterData); 161 }
C# 常用的加密代碼參考