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一、.Net(C#)平台下Des加密解密源代码：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | public class DesEncryptHelper { /// <summary> /// Des默认密钥向量 /// </summary> public static string DesIv { get { return "20160602" ; // 此处可自定义，8个字符长度 } } /// <summary> /// Des加解密钥必须8位 /// </summary> public static string DesKey { get { return "20160602" ; // 此处可自定义，8个字符长度 } } /// <summary> /// 获取Des8位密钥 /// </summary> /// <param name="key">Des密钥字符串</param> /// <param name="encoding">编码类型</param> /// <returns>Des8位密钥</returns> static byte [] GetDesKey( string key, Encoding encoding) { if ( string .IsNullOrEmpty(key)) { throw new ArgumentNullException( "key" , "Des密钥不能为空" ); } if (key.Length > 8) { key = key.Substring(0, 8); } if (key.Length < 8) { // 不足8补全 key = key.PadRight(8, '0' ); } return encoding.GetBytes(key); } /// <summary> /// Des加密 /// </summary> /// <param name="source">源字符串</param> /// <param name="encoding">编码类型</param> /// <returns>加密后的字符串</returns> public string EncryptDes( string source, Encoding encoding = null ) { return EncryptDes(source, DesKey, DesIv, encoding); } /// <summary> /// Des加密 /// </summary> /// <param name="source">源字符串</param> /// <param name="key">des密钥，长度必须8位</param> /// <param name="iv">密钥向量</param> /// <param name="encoding">编码类型</param> /// <returns>加密后的字符串</returns> public static string EncryptDes( string source, string key, string iv, Encoding encoding = null ) { if (encoding == null ) encoding = Encoding.UTF8; byte [] rgbKeys = GetDesKey(key, encoding), rgbIvs = GetDesKey(iv, encoding), inputByteArray = encoding.GetBytes(source); using (DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider()) { using (MemoryStream memoryStream = new MemoryStream()) { using (CryptoStream cryptoStream = new CryptoStream(memoryStream, desProvider.CreateEncryptor(rgbKeys, rgbIvs), CryptoStreamMode.Write)) { cryptoStream.Write(inputByteArray, 0, inputByteArray.Length); // 1.第一种 cryptoStream.FlushFinalBlock(); cryptoStream.Close(); memoryStream.Flush(); memoryStream.Close(); desProvider.Clear(); string result = Convert.ToBase64String(memoryStream.ToArray()); return result; // 2.第二种 //StringBuilder result = new StringBuilder(); //foreach (byte b in memoryStream.ToArray()) //{ // result.AppendFormat("{0:X2}", b); //} //cryptoStream.FlushFinalBlock(); //cryptoStream.Close(); //memoryStream.Flush(); //memoryStream.Close(); //desProvider.Clear(); //return result.ToString(); } } } } /// <summary> /// Des解密 /// </summary> /// <param name="source">源字符串</param> /// <param name="encoding">编码类型</param> /// <returns>解密后的字符串</returns> public static string DecryptDes( string source, Encoding encoding = null ) { return DecryptDes(source, DesKey, DesIv, encoding); } /// <summary> /// Des解密 /// </summary> /// <param name="source">源字符串</param> /// <param name="key">des密钥，长度必须8位</param> /// <param name="iv">密钥向量</param> /// <param name="encoding">编码类型</param> /// <returns>解密后的字符串</returns> public static string DecryptDes( string source, string key, string iv, Encoding encoding = null ) { if (encoding == null ) encoding = Encoding.UTF8; byte [] rgbKeys = GetDesKey(key, encoding), rgbIvs = GetDesKey(iv, encoding), inputByteArray = Convert.FromBase64String(source); using (DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider()) { using (MemoryStream memoryStream = new MemoryStream()) { using (CryptoStream cryptoStream = new CryptoStream(memoryStream, desProvider.CreateDecryptor(rgbKeys, rgbIvs), CryptoStreamMode.Write)) { cryptoStream.Write(inputByteArray, 0, inputByteArray.Length); cryptoStream.FlushFinalBlock(); cryptoStream.Close(); memoryStream.Flush(); memoryStream.Close(); desProvider.Clear(); byte [] result = memoryStream.ToArray(); return encoding.GetString(result); } } } } } |
二、.Net(C#)平台下Aes加密解密源代码：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | public class AesEncryptHelper { /// <summary> /// Aes加解密钥必须32位 /// </summary> public static string AesKey { get { return "asekey32w" ; // 此处可自定义，32个字符长度 } } /// <summary> /// 获取Aes32位密钥 /// </summary> /// <param name="key">Aes密钥字符串</param> /// <param name="encoding">编码类型</param> /// <returns>Aes32位密钥</returns> static byte [] GetAesKey( string key, Encoding encoding) { if ( string .IsNullOrEmpty(key)) { throw new ArgumentNullException( "key" , "Aes密钥不能为空" ); } if (key.Length < 32) { // 不足32补全 key = key.PadRight(32, '0' ); } if (key.Length > 32) { key = key.Substring(0, 32); } return encoding.GetBytes(key); } /// <summary> /// Aes加密 /// </summary> /// <param name="source">源字符串</param> /// <returns>加密后的字符串</returns> public static string EncryptAes( string source) { return EncryptAes(source, AesKey); } /// <summary> /// Aes加密 /// </summary> /// <param name="source">源字符串</param> /// <param name="key">aes密钥，长度必须32位</param> /// <param name="model">运算模式</param> /// <param name="padding">填充模式</param> /// <param name="encoding">编码类型</param> /// <returns>加密后的字符串</returns> public static string EncryptAes( string source, string key, CipherMode model = CipherMode.ECB, PaddingMode padding = PaddingMode.PKCS7, Encoding encoding = null ) { if (encoding == null ) encoding = Encoding.UTF8; using (AesCryptoServiceProvider aesProvider = new AesCryptoServiceProvider()) { aesProvider.Key = GetAesKey(key, encoding); aesProvider.Mode = model; aesProvider.Padding = padding; using (ICryptoTransform cryptoTransform = aesProvider.CreateEncryptor()) { byte [] inputBuffers = encoding.GetBytes(source), results = cryptoTransform.TransformFinalBlock(inputBuffers, 0, inputBuffers.Length); aesProvider.Clear(); return Convert.ToBase64String(results, 0, results.Length); } } } /// <summary> /// Aes解密 /// </summary> /// <param name="source">源字符串</param> /// <returns>解密后的字符串</returns> public static string DecryptAes( string source) { return DecryptAes(source, AesKey); } /// <summary> /// Aes解密 /// </summary> /// <param name="source">源字符串</param> /// <param name="key">aes密钥，长度必须32位</param> /// <param name="model">运算模式</param> /// <param name="padding">填充模式</param> /// <param name="encoding">编码类型</param> /// <returns>解密后的字符串</returns> public static string DecryptAes( string source, string key, CipherMode model = CipherMode.ECB, PaddingMode padding = PaddingMode.PKCS7, Encoding encoding = null ) { if (encoding == null ) encoding = Encoding.UTF8; using (AesCryptoServiceProvider aesProvider = new AesCryptoServiceProvider()) { aesProvider.Key = GetAesKey(key, encoding); aesProvider.Mode = model; aesProvider.Padding = padding; using (ICryptoTransform cryptoTransform = aesProvider.CreateDecryptor()) { byte [] inputBuffers = Convert.FromBase64String(source); byte [] results = cryptoTransform.TransformFinalBlock(inputBuffers, 0, inputBuffers.Length); aesProvider.Clear(); return encoding.GetString(results); } } } } |
三、.Net(C#)平台下Sha1加密解密源代码：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | /// <summary> /// 对字符串SHA1加密 /// </summary> /// <param name="source">源字符串</param> /// <param name="encoding">编码类型</param> /// <returns>加密后的十六进制字符串</returns> public static string Sha1Encrypt( string source, Encoding encoding = null ) { if (encoding == null ) encoding = Encoding.UTF8; // 第一种方式 byte [] byteArray = encoding.GetBytes(source); using (HashAlgorithm hashAlgorithm = new SHA1CryptoServiceProvider()) { byteArray = hashAlgorithm.ComputeHash(byteArray); StringBuilder stringBuilder = new StringBuilder(256); foreach ( byte item in byteArray) { stringBuilder.AppendFormat( "{0:x2}" , item); } hashAlgorithm.Clear(); return stringBuilder.ToString(); } 第二种方式 //using (SHA1 sha1 = SHA1.Create()) //{ // byte[] hash = sha1.ComputeHash(encoding.GetBytes(source)); // StringBuilder stringBuilder = new StringBuilder(); // for (int index = 0; index < hash.Length; ++index) // stringBuilder.Append(hash[index].ToString("x2")); // sha1.Clear(); // return stringBuilder.ToString(); //} } |
四、.Net(C#)平台下MD5加密解密源代码：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | /// <summary> /// 对字符串md5加密 /// </summary> /// <param name="source">源字符串</param> /// <param name="encoding">编码类型</param> /// <returns>加密后的十六进制字符串</returns> public static string Md5Encrypt( string source, Encoding encoding = null ) { if (encoding == null ) encoding = Encoding.UTF8; byte [] byteArray = encoding.GetBytes(source); using (HashAlgorithm hashAlgorithm = new MD5CryptoServiceProvider()) { byteArray = hashAlgorithm.ComputeHash(byteArray); StringBuilder stringBuilder = new StringBuilder(); foreach ( byte item in byteArray) { stringBuilder.AppendFormat( "{0:x2}" , item); } hashAlgorithm.Clear(); return stringBuilder.ToString(); } } |
五、总结：
1、.Net(C#)加密解密使用的类均存在System.Security.Cryptography命名空间下，使用时需先引用。
2、.Net(C#)加密解密类或者其父类都实现IDispose接口，因此需要通过using包裹起来（或者采用.net异常处理机制try catch finally），在使用完后销毁对象。
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