求3DES 算法加密算法程序.谢谢! 有工具用3DES算法能加密一段字符窜也行.求此工具 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 简单的DES加解密import java.security.*;import javax.crypto.*;public class Crypt{ private static String Algorithm = "DES"; //定义 加密算法,可用 DES,DESede,Blowfish static boolean debug = false; static { Security.addProvider(new com.sun.crypto.provider.SunJCE()); } //生成密钥, 注意此步骤时间比较长 public static byte[] getKey() throws Exception { KeyGenerator keygen = KeyGenerator.getInstance(Algorithm); SecretKey deskey = keygen.generateKey(); if (debug) System.out.println("生成密钥:" + byte2hex(deskey.getEncoded())); return deskey.getEncoded(); } //加密 public static byte[] encode(byte[] input, byte[] key) throws Exception { SecretKey deskey = new javax.crypto.spec.SecretKeySpec(key, Algorithm); if (debug) { System.out.println("加密前的二进串:" + byte2hex(input)); System.out.println("加密前的字符串:" + new String(input)); } Cipher c1 = Cipher.getInstance(Algorithm); c1.init(Cipher.ENCRYPT_MODE, deskey); byte[] cipherByte = c1.doFinal(input); if (debug) System.out.println("加密后的二进串:" + byte2hex(cipherByte)); return cipherByte; } //解密 public static byte[] decode(byte[] input, byte[] key) throws Exception { SecretKey deskey = new javax.crypto.spec.SecretKeySpec(key, Algorithm); if (debug) System.out.println("解密前的信息:" + byte2hex(input)); Cipher c1 = Cipher.getInstance(Algorithm); c1.init(Cipher.DECRYPT_MODE, deskey); byte[] clearByte = c1.doFinal(input); if (debug) { System.out.println("解密后的二进串:" + byte2hex(clearByte)); System.out.println("解密后的字符串:" + (new String(clearByte))); } return clearByte; } //md5()信息摘要, 不可逆 public static byte[] md5(byte[] input) throws Exception { java.security.MessageDigest alg = java.security.MessageDigest. getInstance("MD5"); //or "SHA-1" if (debug) { System.out.println("摘要前的二进串:" + byte2hex(input)); System.out.println("摘要前的字符串:" + new String(input)); } alg.update(input); byte[] digest = alg.digest(); if (debug) System.out.println("摘要后的二进串:" + byte2hex(digest)); return digest; } //字节码转换成16进制字符串 public static String byte2hex(byte[] b) { String hs = ""; String stmp = ""; for (int n = 0; n < b.length; n++) { stmp = (java.lang.Integer.toHexString(b[n] & 0XFF)); if (stmp.length() == 1) hs = hs + "0" + stmp; else hs = hs + stmp; if (n < b.length - 1) hs = hs + ":"; } return hs.toUpperCase(); }/* public static void main(String[] args) throws Exception { debug = true;// byte[] key = getKey(); byte[] key = "好好学习".getBytes(); decode(encode("测试加密".getBytes(), key), key); md5("测试加密".getBytes()); }*/}---转贴 初学java,代码通不过编译,求高手指点 急急急!大家帮帮这个女孩! 如何更改才能得到所要的输出结果? 菜鸟求助。。正则表达式不会用啊,请高手指点。。 在子panel里可不可以用类似setVisible关闭主窗体 !!panel是自定义加载到窗体上的!! 使用jacob怎样在文档中自动生成页码? 请问为什么正常的中文经过乱码转换后会变成乱码。 救急啊。。谁知道请告诉我一下。。谢谢 String类型的变量,怎么有时候用!=""判断可以,有时候怎么不对? 丢脸,最简单的问题 各位,问个log4j的问题。 请问JAVA中如何模拟发送一个键盘事件?
import java.security.*;
import javax.crypto.*;public class Crypt
{ private static String Algorithm = "DES"; //定义 加密算法,可用 DES,DESede,Blowfish static boolean debug = false; static
{
Security.addProvider(new com.sun.crypto.provider.SunJCE());
} //生成密钥, 注意此步骤时间比较长
public static byte[] getKey()
throws Exception
{
KeyGenerator keygen = KeyGenerator.getInstance(Algorithm);
SecretKey deskey = keygen.generateKey();
if (debug)
System.out.println("生成密钥:" + byte2hex(deskey.getEncoded()));
return deskey.getEncoded();
} //加密
public static byte[] encode(byte[] input, byte[] key)
throws Exception
{
SecretKey deskey = new javax.crypto.spec.SecretKeySpec(key, Algorithm);
if (debug)
{
System.out.println("加密前的二进串:" + byte2hex(input));
System.out.println("加密前的字符串:" + new String(input));
}
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.ENCRYPT_MODE, deskey);
byte[] cipherByte = c1.doFinal(input);
if (debug)
System.out.println("加密后的二进串:" + byte2hex(cipherByte));
return cipherByte;
} //解密
public static byte[] decode(byte[] input, byte[] key)
throws Exception
{
SecretKey deskey = new javax.crypto.spec.SecretKeySpec(key, Algorithm);
if (debug)
System.out.println("解密前的信息:" + byte2hex(input));
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.DECRYPT_MODE, deskey);
byte[] clearByte = c1.doFinal(input);
if (debug)
{
System.out.println("解密后的二进串:" + byte2hex(clearByte));
System.out.println("解密后的字符串:" + (new String(clearByte)));
}
return clearByte;
} //md5()信息摘要, 不可逆
public static byte[] md5(byte[] input)
throws Exception
{
java.security.MessageDigest alg = java.security.MessageDigest.
getInstance("MD5"); //or "SHA-1"
if (debug)
{
System.out.println("摘要前的二进串:" + byte2hex(input));
System.out.println("摘要前的字符串:" + new String(input));
}
alg.update(input);
byte[] digest = alg.digest();
if (debug)
System.out.println("摘要后的二进串:" + byte2hex(digest));
return digest;
} //字节码转换成16进制字符串
public static String byte2hex(byte[] b)
{
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++)
{
stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
if (stmp.length() == 1)
hs = hs + "0" + stmp;
else
hs = hs + stmp;
if (n < b.length - 1)
hs = hs + ":";
}
return hs.toUpperCase();
}
/*
public static void main(String[] args)
throws Exception
{
debug = true;
// byte[] key = getKey();
byte[] key = "好好学习".getBytes();
decode(encode("测试加密".getBytes(), key), key);
md5("测试加密".getBytes());
}
*/
}
---
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