以下分别是使用了不同的加密方法加密/解密字符串：DES HMACSHA1 SHA1 RC2 MD5 等
using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
namespace Crypt
{
class Crypt
{
[STAThread]
public static void Main(string[] args)
{
string Line;
string Key;
string IV;
string Text;
Console.WriteLine("Input DES,SHA1 key:");
Key = Console.ReadLine() + " ";
Key = Key.Substring(0, 8);
Console.WriteLine("Input DES IV:");
IV = Console.ReadLine() + " ";
IV = Key.Substring(0, 8);
Console.WriteLine("Input text:");
Text = Console.ReadLine();
Line = Crypt.DESEncrypt(Text, Key, IV);
//DES Crypt
Console.WriteLine("DES Crypt:{0}", Line);
//MD5 Crypt
Console.WriteLine("MD5 Crypt:{0}", Crypt.MD5Encrypt(Text));
//HMACSHA1 Crypt
Console.WriteLine("HMACSHA1 Crypt:{0}", Crypt.HMACSHA1Encrypt(Text, Key));
//SHA1 Crypt
Console.WriteLine("SHA1 Crypt:{0}", Crypt.SHA1Encrypt(Text));
//RC2 Crypt
RC2 myRC2 = new RC2(Text);
Console.WriteLine("RC2 Crypt:{0}", myRC2.RC2Encrypt());
/*
Start decrypt
*/
Console.WriteLine("Press any key to decrypt.");
Console.ReadLine();
//DES decrypt
Console.WriteLine("DES decrypt:{0}", Crypt.DESDecrypt(Line, Key, IV));
//RC2 decrypt
Console.WriteLine("RC2 decrypt:{0}", myRC2.RC2Decrypt());
Console.WriteLine("Press any key to exit.");
Console.ReadLine();
}
class RC2
{
private byte[] Key;
private byte[] IV;
private byte[] orgText;
private byte[] encryptText;
private byte[] decryptText;
public RC2(string rc2Text)
{
orgText = Encoding.Default.GetBytes(rc2Text);
RC2CryptoServiceProvider myRC2 = new RC2CryptoServiceProvider();
myRC2.GenerateIV();
myRC2.GenerateKey();
Key = myRC2.Key;
IV = myRC2.IV;
}
public string RC2Encrypt()
{
RC2CryptoServiceProvider myRC2 = new RC2CryptoServiceProvider();
ICryptoTransform myCryptoTrans = myRC2.CreateEncryptor(Key, IV);
MemoryStream MStream = new MemoryStream();
CryptoStream CStream = new CryptoStream(MStream, myCryptoTrans, CryptoStreamMode.Write);
CStream.Write(orgText, 0, orgText.Length);
CStream.FlushFinalBlock();
StringBuilder EnText = new StringBuilder();
encryptText = MStream.ToArray();
foreach (byte Byte in encryptText)
{
EnText.AppendFormat("{0:x2}", Byte);
}
CStream.Close();
return EnText.ToString();
}
public string RC2Decrypt()
{
RC2CryptoServiceProvider myRC2 = new RC2CryptoServiceProvider();
ICryptoTransform myCryptoTrans = myRC2.CreateDecryptor(Key, IV);
MemoryStream MStream = new MemoryStream(encryptText);
CryptoStream CStream = new CryptoStream(MStream, myCryptoTrans, CryptoStreamMode.Read);
decryptText = new byte[encryptText.Length];
CStream.Read(decryptText, 0, decryptText.Length);
StringBuilder EnText = new StringBuilder();
CStream.Close();
ASCIIEncoding myText = new ASCIIEncoding();
return myText.GetString(decryptText);
}
}
public static string SHA1Encrypt(string EncryptText)
{
byte[] StrRes = Encoding.Default.GetBytes(EncryptText);
HashAlgorithm mySHA = new SHA1CryptoServiceProvider();
StrRes = mySHA.ComputeHash(StrRes);
StringBuilder EnText = new StringBuilder();
foreach (byte Byte in StrRes)
{
EnText.AppendFormat("{0:x2}", Byte);
}
return EnText.ToString();
}
public static string HMACSHA1Encrypt(string EncryptText, string EncryptKey)
{
byte[] StrRes = Encoding.Default.GetBytes(EncryptText);
HMACSHA1 myHMACSHA1 = new HMACSHA1(Encoding.Default.GetBytes(EncryptKey));
CryptoStream CStream = new CryptoStream(Stream.Null, myHMACSHA1, CryptoStreamMode.Write);
CStream.Write(StrRes, 0, StrRes.Length);
StringBuilder EnText = new StringBuilder();
foreach (byte Byte in StrRes)
{
EnText.AppendFormat("{0:x2}", Byte);
}
return EnText.ToString();
}
public static string MD5Encrypt(string CryptText)
{
MD5 myMD5 = new MD5CryptoServiceProvider();
byte[] HashCode;
HashCode = Encoding.Default.GetBytes(CryptText);
HashCode = myMD5.ComputeHash(HashCode);
StringBuilder EnText = new StringBuilder();
foreach (byte Byte in HashCode)
{
EnText.AppendFormat("{0:x2}", Byte);
}
return EnText.ToString();
}
public static string DESEncrypt(string CryptText, string CryptKey, string CryptIV)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] textOut = Encoding.Default.GetBytes(CryptText);
byte[] DESKey = ASCIIEncoding.ASCII.GetBytes(CryptKey);
byte[] DESIV = ASCIIEncoding.ASCII.GetBytes(CryptKey);
MemoryStream MStream = new MemoryStream();
CryptoStream CStream = new CryptoStream(MStream, des.CreateEncryptor(DESKey, DESIV), CryptoStreamMode.Write);
CStream.Write(textOut, 0, textOut.Length);
CStream.FlushFinalBlock();
StringBuilder StrRes = new StringBuilder();
foreach (byte Byte in MStream.ToArray())
{
StrRes.AppendFormat("{0:x2}", Byte);
}
return StrRes.ToString();
}
public static string DESDecrypt(string CryptText, string CryptKey, string CryptIV)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] textOut = new byte[CryptText.Length / 2];
for (int Count = 0; Count < CryptText.Length; Count += 2)
{
textOut[Count / 2] = (byte)(Convert.ToInt32(CryptText.Substring(Count, 2), 16));
}
byte[] DESKey = ASCIIEncoding.ASCII.GetBytes(CryptKey);
byte[] DESIV = ASCIIEncoding.ASCII.GetBytes(CryptIV);
MemoryStream MStream = new MemoryStream();
CryptoStream CStream = new CryptoStream(MStream, des.CreateDecryptor(DESKey, DESIV), CryptoStreamMode.Write);
CStream.Write(textOut, 0, textOut.Length);
CStream.FlushFinalBlock();
return System.Text.Encoding.Default.GetString(MStream.ToArray());
}
}
}
调试结果:
Input DES,SHA1 key:
hello
Input DES IV:
world
Input text:
I am a boy my name is DexiangWu
DES Crypt:9e701e4e8f55714bc68253d2ddf53fb6fd6a64df7f6b78f9491a64df18113642
MD5 Crypt:f7d88e861602d2e1e0992dd70967314e
HMACSHA1 Crypt:4920616d206120626f79206d79206e616d652069732044657869616e675775
SHA1 Crypt:d5b25333f3e01ba96ac281e111af08701a7ccfb0
RC2 Crypt:82cc5c822272a721db753e15d918c0d20e62322316fdd4a4d881b8eb03ff55e3
Press any key to decrypt.
DES decrypt:I am a boy my name is DexiangWu
RC2 decrypt:I am a boy my name is DexiangWu