des加密解密JAVA与.NET互通实例

java版本

import javax.crypto.cipher;
import javax.crypto.secretkey;
import javax.crypto.secretkeyfactory;
import javax.crypto.spec.deskeyspec;
import javax.crypto.spec.ivparameterspec;

public class des {
private byte[] deskey;

//解密数据
public static string decrypt(string message,string key) throws exception {

byte[] bytesrc =converthexstring(message);
cipher cipher = cipher.getinstance("des/cbc/pkcs5padding");
deskeyspec deskeyspec = new deskeyspec(key.getbytes("utf-8"));
secretkeyfactory keyfactory = secretkeyfactory.getinstance("des");
secretkey secretkey = keyfactory.generatesecret(deskeyspec);
ivparameterspec iv = new ivparameterspec(key.getbytes("utf-8"));

cipher.init(cipher.decrypt_mode, secretkey, iv);

byte[] retbyte = cipher.dofinal(bytesrc);
return new string(retbyte);
}

public static byte[] encrypt(string message, string key)
throws exception {
cipher cipher = cipher.getinstance("des/cbc/pkcs5padding");

deskeyspec deskeyspec = new deskeyspec(key.getbytes("utf-8"));

secretkeyfactory keyfactory = secretkeyfactory.getinstance("des");
secretkey secretkey = keyfactory.generatesecret(deskeyspec);
ivparameterspec iv = new ivparameterspec(key.getbytes("utf-8"));
cipher.init(cipher.encrypt_mode, secretkey, iv);

return cipher.dofinal(message.getbytes("utf-8"));
}

public static byte[] converthexstring(string ss)
{
byte digest[] = new byte[ss.length() / 2];
for(int i = 0; i < digest.length; i++)
{
string bytestring = ss.substring(2 * i, 2 * i + 2);
int bytevalue = integer.parseint(bytestring, 16);
digest[i] = (byte)bytevalue;
}

return digest;
}

public static void main(string[] args) throws exception {
string key = "12345678";
string value="test1234 ";
string jiami=java.net.urlencoder.encode(value, "utf-8").tolowercase();

system.out.println("加密数据:"+jiami);
string a=tohexstring(encrypt(jiami, key)).touppercase();

system.out.println("加密后的数据为:"+a);
string b=java.net.urldecoder.decode(decrypt(a,key), "utf-8") ;
system.out.println("解密后的数据:"+b);

}

public static string tohexstring(byte b[]) {
stringbuffer hexstring = new stringbuffer();
for (int i = 0; i < b.length; i++) {
string plaintext = integer.tohexstring(0xff & b[i]);
if (plaintext.length() < 2)
plaintext = "0" + plaintext;
hexstring.append(plaintext);
}

return hexstring.tostring();
}

}

.net版本

using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
using system.security.cryptography;
using system.io;
using system.text;
public class testdes{
//cookies加密密钥
public static string des_key = "12345678";

#region desencode des加密
public static string desencode(string ptoencrypt, string skey)
{
ptoencrypt = httpcontext.current.server.urlencode(ptoencrypt);
descryptoserviceprovider des = new descryptoserviceprovider();
byte[] inputbytearray = encoding.getencoding("utf-8").getbytes(ptoencrypt);

des.key = asciiencoding.ascii.getbytes(skey);
des.iv = asciiencoding.ascii.getbytes(skey);
memorystream ms = new memorystream();
cryptostream cs = new cryptostream(ms, des.createencryptor(), cryptostreammode.write);

cs.write(inputbytearray, 0, inputbytearray.length);
cs.flushfinalblock();

stringbuilder ret = new stringbuilder();
foreach (byte b in ms.toarray())
{
ret.appendformat("{0:x2}", b);
}
ret.tostring();
return ret.tostring();
}
#endregion

#region desdecode des解密
public static string desdecode(string ptodecrypt, string skey)
{
// httpcontext.current.response.write(ptodecrypt + "<br>" + skey);
// httpcontext.current.response.end();
descryptoserviceprovider des = new descryptoserviceprovider();

byte[] inputbytearray = new byte[ptodecrypt.length / 2];
for (int x = 0; x < ptodecrypt.length / 2; x++)
{
int i = (convert.toint32(ptodecrypt.substring(x * 2, 2), 16));
inputbytearray[x] = (byte)i;
}

des.key = asciiencoding.ascii.getbytes(skey);
des.iv = asciiencoding.ascii.getbytes(skey);
memorystream ms = new memorystream();
cryptostream cs = new cryptostream(ms, des.createdecryptor(), cryptostreammode.write);
cs.write(inputbytearray, 0, inputbytearray.length);
cs.flushfinalblock();

stringbuilder ret = new stringbuilder();

return httpcontext.current.server.urldecode(system.text.encoding.default.getstring(ms.toarray()));
}
#endregion

public testdes()
{
//
// todo: 在此处添加构造函数逻辑
//
}
}