-
C#加密解密源码
- 加密:
- static String Encrypt(String pwd) {
- DESCryptoServiceProvider desc = new DESCryptoServiceProvider();
- PasswordDeriveBytes db = new PasswordDeriveBytes(pwd, null);
- byte[] key = db.GetBytes(8);
- MemoryStream ms = new MemoryStream();
- CryptoStream cs = new CryptoStream(ms,desc.CreateEncryptor(key, key),CryptoStreamMode.Write);
- byte[] data = Encoding.Unicode.GetBytes(pwd);
- cs.Write(data, 0, data.Length);
- cs.FlushFinalBlock();
- byte[] res = ms.ToArray();
- return Encoding.Unicode.GetString(res);
- }
- 解密:
- static String Decrypt(String pwd, String data) {
- DESCryptoServiceProvider desc = new DESCryptoServiceProvider();
- PasswordDeriveBytes db = new PasswordDeriveBytes(pwd, null);
- byte[] key = db.GetBytes(8);
- MemoryStream ms = new MemoryStream();
- CryptoStream cs = new CryptoStream(ms,desc.CreateDecryptor(key, key),CryptoStreamMode.Write);
- byte[] databytes = Encoding.Unicode.GetBytes(data);
- cs.Write(databytes, 0, databytes.Length);
- cs.FlushFinalBlock();
- byte[] res = ms.ToArray();
- return Encoding.Unicode.GetString(res);
- }
- 1、方法一 (不可逆加密)
-
-
-
- public string EncryptPassword(string PasswordString,string PasswordFormat )
- {
- string encryptPassword = null;
- if (PasswordFormat="SHA1"){
- encryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString
-
- ,"SHA1");
- }
- elseif (PasswordFormat="MD5")
- { encryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString
-
- ,"MD5");
- }
- return encryptPassword ;
- }
-
- 2、方法二 (可逆加密)
-
-
- public interface IBindesh
- {
- string encode(string str);
- string decode(string str);
- }
-
- public class EncryptionDecryption : IBindesh
- {
- public string encode(string str)
- {
- string htext = "";
-
- for ( int i = 0; i < str.Length; i++)
- {
- htext = htext + (char) (str[i] + 10 - 1 * 2);
- }
- return htext;
- }
-
- public string decode(string str)
- {
- string dtext = "";
-
- for ( int i=0; i < str.Length; i++)
- {
- dtext = dtext + (char) (str[i] - 10 + 1*2);
- }
- return dtext;
- }
-
-
- 3、方法三 (可逆加密)
-
-
-
- const string KEY_64 = "VavicApp";
-
- const string IV_64 = "VavicApp";
- 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 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();
- 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
- {
- return 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();
- }
-
- 4、MD5不可逆加密
-
- (32位加密)
-
- public string GetMD5(string s, string _input_charset)
- {
-
- /// <summary>
-
-
-
- MD5 md5 = new MD5CryptoServiceProvider();
- byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
- StringBuilder sb = new StringBuilder(32);
- for (int i = 0; i < t.Length; i++)
- {
- sb.Append(t[i].ToString("x").PadLeft(2, '0'));
- }
- return sb.ToString();
- }
- (16位加密)
-
-
- public static string GetMd5Str(string ConvertString)
- {
- MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
- string t2 =
-
- BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);
- t2 = t2.Replace("-", "");
- return t2;
- }
-
- 5、加解文本文件
-
-
-
- private static void EncryptData(String inName, String outName, byte[] desKey, byte[]
-
- desIV)
- {
-
- FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
- FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
- fout.SetLength(0);
-
-
- byte[] bin = new byte[100];
- long rdlen = 0;
- long totlen = fin.Length;
- int len;
-
- DES des = new DESCryptoServiceProvider();
- CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV),
-
- CryptoStreamMode.Write);
-
-
- while (rdlen < totlen)
- {
- len = fin.Read(bin, 0, 100);
- encStream.Write(bin, 0, len);
- rdlen = rdlen + len;
- }
-
- encStream.Close();
- fout.Close();
- fin.Close();
- }
-
-
- private static void DecryptData(String inName, String outName, byte[] desKey, byte[]
-
- desIV)
- {
-
- FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
- FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
- fout.SetLength(0);
-
-
- byte[] bin = new byte[100];
- long rdlen = 0;
- long totlen = fin.Length;
- int len;
-
- DES des = new DESCryptoServiceProvider();
- CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV),
-
- CryptoStreamMode.Write);
-
-
- while (rdlen < totlen)
- {
- len = fin.Read(bin, 0, 100);
- encStream.Write(bin, 0, len);
- rdlen = rdlen + len;
- }
-
- encStream.Close();
- fout.Close();
- fin.Close();
- }
-
- 6、
-
- using System;
- using System.Collections.Generic;
- using System.Text;
- using System.Security.Cryptography;
- using System.IO;
-
- namespace Component
- {
- public class Security
- {
- public Security()
- {
-
- }
-
-
- private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
- /// <summary>
-
-
-
-
-
- public static string EncryptDES(string encryptString, string encryptKey)
- {
- try
- {
- byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
- 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);
- cStream.Write(inputByteArray, 0, inputByteArray.Length);
- cStream.FlushFinalBlock();
- return Convert.ToBase64String(mStream.ToArray());
- }
- catch
- {
- return encryptString;
- }
- }
-
- /// <summary>
-
-
-
-
-
- public static string DecryptDES(string decryptString, string decryptKey)
- {
- 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.CreateDecryptor(rgbKey,
-
- rgbIV), CryptoStreamMode.Write);
- cStream.Write(inputByteArray, 0, inputByteArray.Length);
- cStream.FlushFinalBlock();
- return Encoding.UTF8.GetString(mStream.ToArray());
- }
- catch
- {
- return decryptString;
- }
- }
-
-
- }
- }
-
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原文地址:https://www.cnblogs.com/IsNull/p/1781453.html
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