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using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.security.cryptography;
using system.io;
namespace windowsformsapplication1
{
#region tripledes算法
public class classtripledes
{
public classtripledes()
{
}
//加密，使用密码产生加密算法的公钥，并使用tripledes对密码进行加密。
public static string encrypt(string pass)
{
try
{
byte[] bt = (new system.text.unicodeencoding()).getbytes(pass);
passwordderivebytes pdb = new passwordderivebytes(pass, null);
byte[] key = pdb.getbytes(24);
byte[] iv = pdb.getbytes(8);
memorystream ms = new memorystream();
tripledescryptoserviceprovider tdesc = new tripledescryptoserviceprovider();
cryptostream cs = new cryptostream(ms, tdesc.createencryptor(key, iv), cryptostreammode.write);
cs.write(bt, 0, bt.length);
cs.flushfinalblock();
return convert.tobase64string(ms.toarray());
}
catch (exception ex)
{
throw ex;
}
}
//解密，使用密码产生加密算法的公钥，并使用tripledes对加密数据进行解密。
public static string decrypt(string str, string pass)
{
try
{
byte[] bt = convert.frombase64string(str);
passwordderivebytes pdb = new passwordderivebytes(pass, null);
byte[] key = pdb.getbytes(24);
byte[] iv = pdb.getbytes(8);
memorystream ms = new memorystream();
tripledescryptoserviceprovider tdesc = new tripledescryptoserviceprovider();
cryptostream cs = new cryptostream(ms, tdesc.createdecryptor(key, iv), cryptostreammode.write);
cs.write(bt, 0, bt.length);
cs.flushfinalblock();
return (new system.text.unicodeencoding()).getstring(ms.toarray());
}
catch (exception ex)
{
throw ex;
}
}
//使用：
//string str = encrypt("bbb");
//console.writeline(decrypt(str, "bbb"));
//加密，使用密码产生加密算法的公钥，并使用tripledes对密码进行加密。
public static string encryptwithkey(string pass, string p_key)
{
try
{
byte[] bt = (new system.text.unicodeencoding()).getbytes(pass);
passwordderivebytes pdb = new passwordderivebytes(p_key, null);
byte[] key = pdb.getbytes(24);
byte[] iv = pdb.getbytes(8);
memorystream ms = new memorystream();
tripledescryptoserviceprovider tdesc = new tripledescryptoserviceprovider();
cryptostream cs = new cryptostream(ms, tdesc.createencryptor(key, iv), cryptostreammode.write);
cs.write(bt, 0, bt.length);
cs.flushfinalblock();
return convert.tobase64string(ms.toarray());
}
catch (exception ex)
{
throw ex;
}
}
//解密，使用密码产生加密算法的公钥，并使用tripledes对加密数据进行解密。
public static string decryptwithkey(string str, string p_key)
{
try
{
byte[] bt = convert.frombase64string(str);
passwordderivebytes pdb = new passwordderivebytes(p_key, null);
byte[] key = pdb.getbytes(24);
byte[] iv = pdb.getbytes(8);
memorystream ms = new memorystream();
tripledescryptoserviceprovider tdesc = new tripledescryptoserviceprovider();
cryptostream cs = new cryptostream(ms, tdesc.createdecryptor(key, iv), cryptostreammode.write);
cs.write(bt, 0, bt.length);
cs.flushfinalblock();
return (new system.text.unicodeencoding()).getstring(ms.toarray());
}
catch (exception ex)
{
throw ex;
}
}
}
#endregion
}
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