1、C#加密算法汇总方法一： /须添加对System.Web的引用 using System.Web.Security; . / / SHA1加密字符串 / / 源字符串 / 加密后的字符串 public string SHA1(string source) return FormsAuthentication.HashPasswordForStoringInConfigFile(source, SHA1); / / MD5加密字符串 / / 源字符串 / 加密后的字符串 public string MD5(string source) return FormsAuthentication.Has
2、hPasswordForStoringInConfigFile(source, MD5); 方法二(可逆加密解密)： using System.Security.Cryptography; . public string Encode(string data) byte byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); byte byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); DESCryptoServiceProvider cryptoProvider = new
3、 DESCryptoServiceProvider(); int i = cryptoProvider.KeySize; MemoryStream ms = new MemoryStream(); CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); StreamWriter sw = new StreamWriter(cst); sw.Write(data); sw.Flush(); cst.FlushFinalBlock();
4、 sw.Flush(); return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length); public string Decode(string data) byte byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); byte byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); byte byEnc; try byEnc = Convert.FromBase64String(data); catch r
5、eturn null; DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); MemoryStream ms = new MemoryStream(byEnc); CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read); StreamReader sr = new StreamReader(cst); return sr.ReadToEnd()
6、; 方法三(MD5不可逆)： using System.Security.Cryptography; . /MD5不可逆加密 /32位加密 public string GetMD5_32(string s, string _input_charset) MD5 md5 = new MD5CryptoServiceProvider(); byte t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s); StringBuilder sb = new StringBuilder(32); for (int i = 0
7、; i t.Length; i+) sb.Append(ti.ToString(x).PadLeft(2, 0); return sb.ToString(); /16位加密 public static string GetMd5_16(string ConvertString) MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString), 4
8、, 8); t2 = t2.Replace(-, ); return t2; 方法四(对称加密)： using System.IO; using System.Security.Cryptography; . private SymmetricAlgorithm mobjCryptoService; private string Key; / / 对称加密类的构造函数 / public SymmetricMethod() mobjCryptoService = new RijndaelManaged(); Key = Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76
9、*h%(HilJ$lhj!y6&(*jkP87jH7; / / 获得密钥 / / 密钥 private byte GetLegalKey() string sTemp = Key; mobjCryptoService.GenerateKey(); byte bytTemp = mobjCryptoService.Key; int KeyLength = bytTemp.Length; if (sTemp.Length KeyLength) sTemp = sTemp.Substring(0, KeyLength); else if (sTemp.Length KeyLength) sTemp
10、= sTemp.PadRight(KeyLength, ); return ASCIIEncoding.ASCII.GetBytes(sTemp); / / 获得初始向量IV / / 初试向量IV private byte GetLegalIV() string sTemp = E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk; mobjCryptoService.GenerateIV(); byte bytTemp = mobjCryptoService.IV; int IVLength = bytTemp.Le
11、ngth; if (sTemp.Length IVLength) sTemp = sTemp.Substring(0, IVLength); else if (sTemp.Length IVLength) sTemp = sTemp.PadRight(IVLength, ); return ASCIIEncoding.ASCII.GetBytes(sTemp); / / 加密方法 / / 待加密的串 / 经过加密的串 public string Encrypto(string Source) byte bytIn = UTF8Encoding.UTF8.GetBytes(Source); Me
12、moryStream ms = new MemoryStream(); mobjCryptoService.Key = GetLegalKey(); mobjCryptoService.IV = GetLegalIV(); ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor(); CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write); cs.Write(bytIn, 0, bytIn.Length); cs.FlushFinalBl
13、ock(); ms.Close(); byte bytOut = ms.ToArray(); return Convert.ToBase64String(bytOut); / / 解密方法 / / 待解密的串 / 经过解密的串 public string Decrypto(string Source) byte bytIn = Convert.FromBase64String(Source); MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length); mobjCryptoService.Key = GetLegalKey(); mo
14、bjCryptoService.IV = GetLegalIV(); ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor(); CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cs); return sr.ReadToEnd(); 方法五： using System.IO; using System.Security.Cryptography; using
15、System.Text; . /默认密钥向量 private static byte Keys = 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF ; / / DES加密字符串 / / 待加密的字符串 / 加密密钥,要求为8位 / 加密成功返回加密后的字符串，失败返回源串 public static string EncryptDES(string encryptString, string encryptKey) try byte rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)
16、; byte rgbIV = Keys; byte inputByteArray = Encoding.UTF8.GetBytes(encryptString); DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
17、cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Convert.ToBase64String(mStream.ToArray(); catch return encryptString; / / DES解密字符串 / / 待解密的字符串 / 解密密钥,要求为8位,和加密密钥相同 / 解密成功返回解密后的字符串，失败返源串 public static string DecryptDES(string decryptString, string decryptKey
18、) try byte rgbKey = Encoding.UTF8.GetBytes(decryptKey); byte rgbIV = Keys; byte inputByteArray = Convert.FromBase64String(decryptString); DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, DCSP.C
19、reateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Encoding.UTF8.GetString(mStream.ToArray(); catch return decryptString; 方法六(文件加密)： using System.IO; using System.Security.Cryptography; using System.Text;
20、 . /加密文件 private static void EncryptData(String inName, String outName, byte desKey, byte desIV) /Create the file streams to handle the input and output files. FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, Fi
21、leAccess.Write); fout.SetLength(0); /Create variables to help with read and write. byte bin = new byte100; /This is intermediate storage for the encryption. long rdlen = 0; /This is the total number of bytes written. long totlen = fin.Length; /This is the total length of the input file. int len; /Th
22、is is the number of bytes to be written at a time. DES des = new DESCryptoServiceProvider(); CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write); /Read from the input file, then encrypt and write to the output file. while (rdlen totlen) len = f
23、in.Read(bin, 0, 100); encStream.Write(bin, 0, len); rdlen = rdlen + len; encStream.Close(); fout.Close(); fin.Close(); /解密文件 private static void DecryptData(String inName, String outName, byte desKey, byte desIV) /Create the file streams to handle the input and output files. FileStream fin = new Fil
24、eStream(inName, FileMode.Open, FileAccess.Read); FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); fout.SetLength(0); /Create variables to help with read and write. byte bin = new byte100; /This is intermediate storage for the encryption. long rdlen = 0; /This is th
25、e total number of bytes written. long totlen = fin.Length; /This is the total length of the input file. int len; /This is the number of bytes to be written at a time. DES des = new DESCryptoServiceProvider(); CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoS
26、treamMode.Write); /Read from the input file, then encrypt and write to the output file. while (rdlen totlen) len = fin.Read(bin, 0, 100); encStream.Write(bin, 0, len); rdlen = rdlen + len; encStream.Close(); fout.Close(); fin.Close(); using System;using System.Security.Cryptography;/这个是处理文字编码的前提using System.Text;using System.IO;/ / DES加密方法/ / 明文/ 密钥/ 向量/ 密文public string DESEncrypt(string strPlain,string strDESKey,string strDESIV) /把密钥转换成字节数组 byte bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey
