1 using System;  2 using System.IO;  3 using System.Security.Cryptography;  4 using System.Text;  5   6 namespace Wen.Helpers  7 {  8     /// <summary>  9     /// 安全助手 10     /// </summary> 11     public sealed class SecurityHelper 12     { 13         private static readonly byte [] IvBytes = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF }; 14  15         #region 通用加密算法 16  17         /// <summary> 18         /// 哈希加密算法 19         /// </summary> 20         /// <param name="hashAlgorithm"> 所有加密哈希算法实现均必须从中派生的基类 </param> 21         /// <param name="input"> 待加密的字符串 </param> 22         /// <param name="encoding"> 字符编码 </param> 23         /// <returns></returns> 24         private static string HashEncrypt( HashAlgorithm hashAlgorithm, string input, Encoding encoding) 25         { 26             var data =http://www.mamicode.com/ hashAlgorithm.ComputeHash(encoding.GetBytes(input)); 27  28             return BitConverter .ToString(data).Replace( "-", "" ); 29         } 30  31         /// <summary> 32         /// 验证哈希值 33         /// </summary> 34         /// <param name="hashAlgorithm"> 所有加密哈希算法实现均必须从中派生的基类 </param> 35         /// <param name="unhashedText"> 未加密的字符串 </param> 36         /// <param name="hashedText"> 经过加密的哈希值 </param> 37         /// <param name="encoding"> 字符编码 </param> 38         /// <returns></returns> 39         private static bool VerifyHashValue( HashAlgorithm hashAlgorithm, string unhashedText, string hashedText, 40             Encoding encoding) 41         { 42             return string .Equals(HashEncrypt(hashAlgorithm, unhashedText, encoding), hashedText, 43                 StringComparison .OrdinalIgnoreCase); 44         } 45  46         #endregion 通用加密算法 47  48         #region 哈希加密算法 49  50         #region MD5 算法 51  52         /// <summary> 53         /// MD5 加密 54         /// </summary> 55         /// <param name="input"> 待加密的字符串 </param> 56         /// <param name="encoding"> 字符编码 </param> 57         /// <returns></returns> 58         public static string MD5Encrypt( string input, Encoding encoding) 59         { 60             return HashEncrypt(MD5 .Create(), input, encoding); 61         } 62  63         /// <summary> 64         /// 验证 MD5 值 65         /// </summary> 66         /// <param name="input"> 未加密的字符串 </param> 67         /// <param name="encoding"> 字符编码 </param> 68         /// <returns></returns> 69         public static bool VerifyMD5Value( string input, Encoding encoding) 70         { 71             return VerifyHashValue(MD5 .Create(), input, MD5Encrypt(input, encoding), encoding); 72         } 73  74         #endregion MD5 算法 75  76         #region SHA1 算法 77  78         /// <summary> 79         /// SHA1 加密 80         /// </summary> 81         /// <param name="input"> 要加密的字符串 </param> 82         /// <param name="encoding"> 字符编码 </param> 83         /// <returns></returns> 84         public static string SHA1Encrypt( string input, Encoding encoding) 85         { 86             return HashEncrypt(SHA1 .Create(), input, encoding); 87         } 88  89         /// <summary> 90         /// 验证 SHA1 值 91         /// </summary> 92         /// <param name="input"> 未加密的字符串 </param> 93         /// <param name="encoding"> 字符编码 </param> 94         /// <returns></returns> 95         public static bool VerifySHA1Value( string input, Encoding encoding) 96         { 97             return VerifyHashValue(SHA1 .Create(), input, SHA1Encrypt(input, encoding), encoding); 98         } 99 100         #endregion SHA1 算法101 102         #region SHA256 算法103 104         /// <summary>105         /// SHA256 加密106         /// </summary>107         /// <param name="input"> 要加密的字符串 </param>108         /// <param name="encoding"> 字符编码 </param>109         /// <returns></returns>110         public static string SHA256Encrypt( string input, Encoding encoding)111         {112             return HashEncrypt(SHA256 .Create(), input, encoding);113         }114 115         /// <summary>116         /// 验证 SHA256 值117         /// </summary>118         /// <param name="input"> 未加密的字符串 </param>119         /// <param name="encoding"> 字符编码 </param>120         /// <returns></returns>121         public static bool VerifySHA256Value( string input, Encoding encoding)122         {123             return VerifyHashValue(SHA256 .Create(), input, SHA256Encrypt(input, encoding), encoding);124         }125 126         #endregion SHA256 算法127 128         #region SHA384 算法129 130         /// <summary>131         /// SHA384 加密132         /// </summary>133         /// <param name="input"> 要加密的字符串 </param>134         /// <param name="encoding"> 字符编码 </param>135         /// <returns></returns>136         public static string SHA384Encrypt( string input, Encoding encoding)137         {138             return HashEncrypt(SHA384 .Create(), input, encoding);139         }140 141         /// <summary>142         /// 验证 SHA384 值143         /// </summary>144         /// <param name="input"> 未加密的字符串 </param>145         /// <param name="encoding"> 字符编码 </param>146         /// <returns></returns>147         public static bool VerifySHA384Value( string input, Encoding encoding)148         {149             return VerifyHashValue(SHA256 .Create(), input, SHA384Encrypt(input, encoding), encoding);150         }151 152         #endregion SHA384 算法153 154         #region SHA512 算法155 156         /// <summary>157         /// SHA512 加密158         /// </summary>159         /// <param name="input"> 要加密的字符串 </param>160         /// <param name="encoding"> 字符编码 </param>161         /// <returns></returns>162         public static string SHA512Encrypt( string input, Encoding encoding)163         {164             return HashEncrypt(SHA512 .Create(), input, encoding);165         }166 167         /// <summary>168         /// 验证 SHA512 值169         /// </summary>170         /// <param name="input"> 未加密的字符串 </param>171         /// <param name="encoding"> 字符编码 </param>172         /// <returns></returns>173         public static bool VerifySHA512Value( string input, Encoding encoding)174         {175             return VerifyHashValue(SHA512 .Create(), input, SHA512Encrypt(input, encoding), encoding);176         }177 178         #endregion SHA512 算法179 180         #region HMAC-MD5 加密181 182         /// <summary>183         /// HMAC-MD5 加密184         /// </summary>185         /// <param name="input"> 要加密的字符串 </param>186         /// <param name="key"> 密钥 </param>187         /// <param name="encoding"> 字符编码 </param>188         /// <returns></returns>189         public static string HMACSMD5Encrypt( string input, string key, Encoding encoding)190         {191             return HashEncrypt(new HMACMD5 (encoding.GetBytes(key)), input, encoding);192         }193 194         #endregion HMAC-MD5 加密195 196         #region HMAC-SHA1 加密197 198         /// <summary>199         /// HMAC-SHA1 加密200         /// </summary>201         /// <param name="input"> 要加密的字符串 </param>202         /// <param name="key"> 密钥 </param>203         /// <param name="encoding"> 字符编码 </param>204         /// <returns></returns>205         public static string HMACSHA1Encrypt( string input, string key, Encoding encoding)206         {207             return HashEncrypt(new HMACSHA1 (encoding.GetBytes(key)), input, encoding);208         }209 210         #endregion HMAC-SHA1 加密211 212         #region HMAC-SHA256 加密213 214         /// <summary>215         /// HMAC-SHA256 加密216         /// </summary>217         /// <param name="input"> 要加密的字符串 </param>218         /// <param name="key"> 密钥 </param>219         /// <param name="encoding"> 字符编码 </param>220         /// <returns></returns>221         public static string HMACSHA256Encrypt( string input, string key, Encoding encoding)222         {223             return HashEncrypt(new HMACSHA256 (encoding.GetBytes(key)), input, encoding);224         }225 226         #endregion HMAC-SHA256 加密227 228         #region HMAC-SHA384 加密229 230         /// <summary>231         /// HMAC-SHA384 加密232         /// </summary>233         /// <param name="input"> 要加密的字符串 </param>234         /// <param name="key"> 密钥 </param>235         /// <param name="encoding"> 字符编码 </param>236         /// <returns></returns>237         public static string HMACSHA384Encrypt( string input, string key, Encoding encoding)238         {239             return HashEncrypt(new HMACSHA384 (encoding.GetBytes(key)), input, encoding);240         }241 242         #endregion HMAC-SHA384 加密243 244         #region HMAC-SHA512 加密245 246         /// <summary>247         /// HMAC-SHA512 加密248         /// </summary>249         /// <param name="input"> 要加密的字符串 </param>250         /// <param name="key"> 密钥 </param>251         /// <param name="encoding"> 字符编码 </param>252         /// <returns></returns>253         public static string HMACSHA512Encrypt( string input, string key, Encoding encoding)254         {255             return HashEncrypt(new HMACSHA512 (encoding.GetBytes(key)), input, encoding);256         }257 258         #endregion HMAC-SHA512 加密259 260         #endregion 哈希加密算法261 262         #region 对称加密算法263 264         #region Des 加解密265 266         /// <summary>267         /// DES 加密268         /// </summary>269         /// <param name="input"> 待加密的字符串 </param>270         /// <param name="key"> 密钥（8位） </param>271         /// <returns></returns>272         public static string DESEncrypt( string input, string key)273         {274             try275             {276                 var keyBytes = Encoding .UTF8.GetBytes(key);277                 //var ivBytes = Encoding.UTF8.GetBytes(iv);278 279                 var des = DES .Create();280                 des.Mode = CipherMode .ECB; //兼容其他语言的 Des 加密算法281                 des.Padding = PaddingMode .Zeros; //自动补 0282 283                 using (var ms = new MemoryStream ())284                 {285                     var data =http://www.mamicode.com/ Encoding .UTF8.GetBytes(input);286 287                     using (var cs = new CryptoStream (ms, des.CreateEncryptor(keyBytes, IvBytes), CryptoStreamMode .Write)288                         )289                     {290                         cs.Write(data, 0, data.Length);291                         cs.FlushFinalBlock();292                     }293 294                     return Convert .ToBase64String(ms.ToArray());295                 }296             }297             catch298             {299                 return input;300             }301         }302 303         /// <summary>304         /// DES 解密305         /// </summary>306         /// <param name="input"> 待解密的字符串 </param>307         /// <param name="key"> 密钥（8位） </param>308         /// <returns></returns>309         public static string DESDecrypt( string input, string key)310         {311             try312             {313                 var keyBytes = Encoding .UTF8.GetBytes(key);314                 //var ivBytes = Encoding.UTF8.GetBytes(iv);315 316                 var des = DES .Create();317                 des.Mode = CipherMode .ECB; //兼容其他语言的Des加密算法318                 des.Padding = PaddingMode .Zeros; //自动补0319 320                 using (var ms = new MemoryStream ())321                 {322                     var data =http://www.mamicode.com/ Convert .FromBase64String(input);323 324                     using (var cs = new CryptoStream (ms, des.CreateDecryptor(keyBytes, IvBytes), CryptoStreamMode .Write)325                         )326                     {327                         cs.Write(data, 0, data.Length);328 329                         cs.FlushFinalBlock();330                     }331 332                     return Encoding .UTF8.GetString(ms.ToArray());333                 }334             }335             catch336             {337                 return input;338             }339         }340 341         #endregion Des 加解密342 343         #endregion 对称加密算法344 345         #region 非对称加密算法346 347         /// <summary>348         /// 生成 RSA 公钥和私钥349         /// </summary>350         /// <param name="publicKey"> 公钥 </param>351         /// <param name="privateKey"> 私钥 </param>352         public static void GenerateRSAKeys( out string publicKey, out string privateKey)353         {354             using (var rsa = new RSACryptoServiceProvider ())355             {356                 publicKey = rsa.ToXmlString( false );357                 privateKey = rsa.ToXmlString( true );358             }359         }360 361         /// <summary>362         /// RSA 加密363         /// </summary>364         /// <param name="publickey"> 公钥 </param>365         /// <param name="content"> 待加密的内容 </param>366         /// <returns> 经过加密的字符串 </returns>367         public static string RSAEncrypt( string publickey, string content)368         {369             var rsa = new RSACryptoServiceProvider();370             rsa.FromXmlString(publickey);371             var cipherbytes = rsa.Encrypt(Encoding .UTF8.GetBytes(content), false);372 373             return Convert .ToBase64String(cipherbytes);374         }375 376         /// <summary>377         /// RSA 解密378         /// </summary>379         /// <param name="privatekey"> 私钥 </param>380         /// <param name="content"> 待解密的内容 </param>381         /// <returns> 解密后的字符串 </returns>382         public static string RSADecrypt( string privatekey, string content)383         {384             var rsa = new RSACryptoServiceProvider();385             rsa.FromXmlString(privatekey);386             var cipherbytes = rsa.Decrypt(Convert .FromBase64String(content), false);387 388             return Encoding .UTF8.GetString(cipherbytes);389         }390 391         #endregion 非对称加密算法392     }393 }