1 //方法一： 2 3 //须添加对System.Web的引用 4 5 using System.Web.Security; 6 7 8 /// <summary> 9 10 /// SHA1加密字符串 11 12 /// </summary> 13 14 /// <param name="source">源字符串</param> 15 16 /// <returns>加密后的字符串</returns> 17 18 public string SHA1(string source) 19 { 20 21 return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1"); 22 23 } 24 25 26 27 /// <summary> 28 29 /// MD5加密字符串 30 /// </summary> 31 /// <param name="source">源字符串</param> 32 /// <returns>加密后的字符串</returns> 33 public string MD5(string source) 34 { 35 return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5");; 36 } 37 38 39 //方法二(可逆加密解密)： 40 41 using System.Security.Cryptography; 42 43 44 45 public string Encode(string data) 46 47 { 48 49 byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); 50 51 byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); 52 53 54 DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 55 56 int i = cryptoProvider.KeySize; 57 58 MemoryStream ms = new MemoryStream(); 59 60 CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); 61 62 63 StreamWriter sw = new StreamWriter(cst); 64 65 sw.Write(data); 66 67 sw.Flush(); 68 69 cst.FlushFinalBlock(); 70 71 sw.Flush(); 72 73 return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length); 74 75 76 } 77 78 79 public string Decode(string data) 80 { 81 byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); 82 83 byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); 84 85 86 byte[] byEnc; 87 88 try 89 90 { 91 byEnc = Convert.FromBase64String(data); 92 } 93 catch 94 { 95 return null; 96 97 } 98 99 DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 100 101 MemoryStream ms = new MemoryStream(byEnc); 102 103 CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read); 104 105 StreamReader sr = new StreamReader(cst); 106 107 return sr.ReadToEnd(); 108 } 109 110 111 112 113 //方法三(MD5不可逆)： 114 115 using System.Security.Cryptography; 116 117 118 119 120 //MD5不可逆加密 121 122 123 //32位加密 124 125 public string GetMD5_32(string s, string _input_charset) 126 127 { 128 129 MD5 md5 = new MD5CryptoServiceProvider(); 130 131 byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s)); 132 133 StringBuilder sb = new StringBuilder(32); 134 135 for (int i = 0; i < t.Length; i++) 136 { 137 sb.Append(t[i].ToString("x").PadLeft(2, '0')); 138 } 139 return sb.ToString(); 140 } 141 142 //16位加密 143 144 public static string GetMd5_16(string ConvertString) 145 146 { 147 148 MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); 149 150 string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8); 151 152 t2 = t2.Replace("-", ""); 153 154 return t2; 155 } 156 157 158 //方法四(对称加密)： 159 160 using System.IO; 161 162 using System.Security.Cryptography; 163 164 165 166 167 private SymmetricAlgorithm mobjCryptoService; 168 169 private string Key; 170 171 /// <summary> 172 173 /// 对称加密类的构造函数 174 /// </summary> 175 public SymmetricMethod() 176 177 { 178 179 mobjCryptoService = new RijndaelManaged(); 180 181 Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7"; 182 } 183 184 185 /// <summary> 186 187 /// 获得密钥 188 189 /// </summary> 190 191 /// <returns>密钥</returns> 192 193 private byte[] GetLegalKey() 194 195 { 196 197 string sTemp = Key; 198 199 mobjCryptoService.GenerateKey(); 200 201 byte[] bytTemp = mobjCryptoService.Key; 202 203 int KeyLength = bytTemp.Length; 204 205 if (sTemp.Length > KeyLength) 206 207 sTemp = sTemp.Substring(0, KeyLength); 208 209 else if (sTemp.Length < KeyLength) 210 211 sTemp = sTemp.PadRight(KeyLength, ' '); 212 213 return ASCIIEncoding.ASCII.GetBytes(sTemp); 214 215 } 216 217 /// <summary> 218 219 /// 获得初始向量IV 220 221 /// </summary> 222 223 /// <returns>初试向量IV</returns> 224 225 private byte[] GetLegalIV() 226 227 { 228 229 string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk"; 230 231 mobjCryptoService.GenerateIV(); 232 233 byte[] bytTemp = mobjCryptoService.IV; 234 235 int IVLength = bytTemp.Length; 236 237 if (sTemp.Length > IVLength) 238 239 sTemp = sTemp.Substring(0, IVLength); 240 241 else if (sTemp.Length < IVLength) 242 243 sTemp = sTemp.PadRight(IVLength, ' '); 244 245 return ASCIIEncoding.ASCII.GetBytes(sTemp); 246 247 } 248 249 /// <summary> 250 251 /// 加密方法 252 253 /// </summary> 254 255 /// <param name="Source">待加密的串</param> 256 257 /// <returns>经过加密的串</returns> 258 259 public string Encrypto(string Source) 260 261 { 262 263 byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source); 264 265 MemoryStream ms = new MemoryStream(); 266 267 mobjCryptoService.Key = GetLegalKey(); 268 269 mobjCryptoService.IV = GetLegalIV(); 270 271 ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor(); 272 273 CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write); 274 275 cs.Write(bytIn, 0, bytIn.Length); 276 277 cs.FlushFinalBlock(); 278 279 ms.Close(); 280 281 byte[] bytOut = ms.ToArray(); 282 283 return Convert.ToBase64String(bytOut); 284 285 } 286 287 /// <summary> 288 289 /// 解密方法 290 291 /// </summary> 292 293 /// <param name="Source">待解密的串</param> 294 295 /// <returns>经过解密的串</returns> 296 297 public string Decrypto(string Source) 298 299 { 300 301 byte[] bytIn = Convert.FromBase64String(Source); 302 303 MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length); 304 305 mobjCryptoService.Key = GetLegalKey(); 306 307 mobjCryptoService.IV = GetLegalIV(); 308 309 ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor(); 310 311 CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read); 312 313 StreamReader sr = new StreamReader(cs); 314 315 return sr.ReadToEnd(); 316 317 } 318 319 // 方法五： 320 321 using System.IO; 322 323 using System.Security.Cryptography; 324 325 using System.Text; 326 327 328 329 330 331 //默认密钥向量 332 333 private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; 334 335 /// <summary> 336 337 /// DES加密字符串 338 339 /// </summary> 340 341 /// <param name="encryptString">待加密的字符串</param> 342 343 /// <param name="encryptKey">加密密钥,要求为8位</param> 344 345 /// <returns>加密成功返回加密后的字符串，失败返回源串</returns> 346 347 public static string EncryptDES(string encryptString, string encryptKey) 348 349 { 350 351 try 352 353 { 354 355 byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); 356 357 byte[] rgbIV = Keys; 358 359 byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); 360 361 DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); 362 363 MemoryStream mStream = new MemoryStream(); 364 365 CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); 366 367 cStream.Write(inputByteArray, 0, inputByteArray.Length); 368 369 cStream.FlushFinalBlock(); 370 371 return Convert.ToBase64String(mStream.ToArray()); 372 373 } 374 375 catch 376 377 { 378 379 return encryptString; 380 381 } 382 383 } 384 385 386 387 /// <summary> 388 389 /// DES解密字符串 390 391 /// </summary> 392 393 /// <param name="decryptString">待解密的字符串</param> 394 395 /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param> 396 397 /// <returns>解密成功返回解密后的字符串，失败返源串</returns> 398 399 public static string DecryptDES(string decryptString, string decryptKey) 400 401 { 402 403 try 404 405 { 406 407 byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey); 408 409 byte[] rgbIV = Keys; 410 411 byte[] inputByteArray = Convert.FromBase64String(decryptString); 412 413 DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); 414 415 MemoryStream mStream = new MemoryStream(); 416 417 CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); 418 419 cStream.Write(inputByteArray, 0, inputByteArray.Length); 420 421 cStream.FlushFinalBlock(); 422 423 return Encoding.UTF8.GetString(mStream.ToArray()); 424 425 } 426 427 catch 428 429 { 430 431 return decryptString; 432 433 } 434 } 435 436 // 方法六(文件加密)： 437 438 using System.IO; 439 440 using System.Security.Cryptography; 441 442 using System.Text; 443 444 445 446 447 448 //加密文件 449 450 private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV) 451 452 { 453 454 //Create the file streams to handle the input and output files. 455 456 FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); 457 458 FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); 459 460 fout.SetLength(0); 461 462 463 464 //Create variables to help with read and write. 465 466 byte[] bin = new byte[100]; //This is intermediate storage for the encryption. 467 468 long rdlen = 0; //This is the total number of bytes written. 469 470 long totlen = fin.Length; //This is the total length of the input file. 471 472 int len; //This is the number of bytes to be written at a time. 473 474 475 476 DES des = new DESCryptoServiceProvider(); 477 478 CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write); 479 480 481 482 //Read from the input file, then encrypt and write to the output file. 483 484 while (rdlen < totlen) 485 486 { 487 488 len = fin.Read(bin, 0, 100); 489 490 encStream.Write(bin, 0, len); 491 492 rdlen = rdlen + len; 493 494 } 495 496 497 498 encStream.Close(); 499 500 fout.Close(); 501 502 fin.Close(); 503 504 } 505 506 507 508 //解密文件 509 510 private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV) 511 512 { 513 514 //Create the file streams to handle the input and output files. 515 516 FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); 517 518 FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); 519 520 fout.SetLength(0); 521 522 523 524 //Create variables to help with read and write. 525 526 byte[] bin = new byte[100]; //This is intermediate storage for the encryption. 527 528 long rdlen = 0; //This is the total number of bytes written. 529 530 long totlen = fin.Length; //This is the total length of the input file. 531 532 int len; //This is the number of bytes to be written at a time. 533 534 535 536 DES des = new DESCryptoServiceProvider(); 537 538 CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write); 539 540 541 542 //Read from the input file, then encrypt and write to the output file. 543 544 while (rdlen < totlen) 545 546 { 547 548 len = fin.Read(bin, 0, 100); 549 550 encStream.Write(bin, 0, len); 551 552 rdlen = rdlen + len; 553 554 } 555 556 557 558 encStream.Close(); 559 560 fout.Close(); 561 562 fin.Close(); 563 564 } 565 566 567 568 569 using System; 570 571 using System.Security.Cryptography;//这个是处理文字编码的前提 572 573 using System.Text; 574 575 using System.IO; 576 577 578 /// <summary> 579 580 /// DES加密方法 581 582 /// </summary> 583 584 /// <param name="strPlain">明文</param> 585 586 /// <param name="strDESKey">密钥</param> 587 588 /// <param name="strDESIV">向量</param> 589 590 /// <returns>密文</returns> 591 592 public string DESEncrypt(string strPlain,string strDESKey,string strDESIV) 593 594 { 595 596 //把密钥转换成字节数组 597 598 byte[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey); 599 600 //把向量转换成字节数组 601 602 byte[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV); 603 604 //声明1个新的DES对象 605 606 DESCryptoServiceProvider desEncrypt=new DESCryptoServiceProvider(); 607 608 //开辟一块内存流 609 610 MemoryStream msEncrypt=new MemoryStream(); 611 612 //把内存流对象包装成加密流对象 613 614 CryptoStream csEncrypt=new CryptoStream(msEncrypt,desEncrypt.CreateEncryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Write); 615 616 //把加密流对象包装成写入流对象 617 618 StreamWriter swEncrypt=new StreamWriter(csEncrypt); 619 620 //写入流对象写入明文 621 622 swEncrypt.WriteLine(strPlain); 623 624 //写入流关闭 625 626 swEncrypt.Close(); 627 628 //加密流关闭 629 630 csEncrypt.Close(); 631 632 //把内存流转换成字节数组，内存流现在已经是密文了 633 634 byte[] bytesCipher=msEncrypt.ToArray(); 635 636 //内存流关闭 637 638 msEncrypt.Close(); 639 640 //把密文字节数组转换为字符串，并返回 641 642 return UnicodeEncoding.Unicode.GetString(bytesCipher); 643 644 } 645 646 647 648 649 650 651 652 /// <summary> 653 654 /// DES解密方法 655 656 /// </summary> 657 658 /// <param name="strCipher">密文</param> 659 660 /// <param name="strDESKey">密钥</param> 661 662 /// <param name="strDESIV">向量</param> 663 664 /// <returns>明文</returns> 665 666 public string DESDecrypt(string strCipher,string strDESKey,string strDESIV) 667 668 { 669 670 //把密钥转换成字节数组 671 672 byte[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey); 673 674 //把向量转换成字节数组 675 676 byte[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV); 677 678 //把密文转换成字节数组 679 680 byte[] bytesCipher=UnicodeEncoding.Unicode.GetBytes(strCipher); 681 682 //声明1个新的DES对象 683 684 DESCryptoServiceProvider desDecrypt=new DESCryptoServiceProvider(); 685 686 //开辟一块内存流，并存放密文字节数组 687 688 MemoryStream msDecrypt=new MemoryStream(bytesCipher); 689 690 //把内存流对象包装成解密流对象 691 692 CryptoStream csDecrypt=new CryptoStream(msDecrypt,desDecrypt.CreateDecryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Read); 693 694 //把解密流对象包装成读出流对象 695 696 StreamReader srDecrypt=new StreamReader(csDecrypt); 697 698 //明文=读出流的读出内容 699 700 string strPlainText=srDecrypt.ReadLine(); 701 702 //读出流关闭 703 704 srDecrypt.Close(); 705 706 //解密流关闭 707 708 csDecrypt.Close(); 709 710 //内存流关闭 711 712 msDecrypt.Close(); 713 714 //返回明文 715 716 return strPlainText; 717 718 }
posted on
