Seeking Java encryption source code (MD5, BASE64)

Import java.security.*;
import javax.crypto.*;

/**
*This example explains how to use the DES private key plus algorithm to decrypt
*
* @AUTHOR Devon
* @Version 1.0 04/03/10
*/
Public class {

) {
try {
string algorithm = "des"; // Define the encryption algorithm, you can use the design, the desede, blowfish
string message = "Hello World."

// generate a DES key
=. (Algorithm);
.init (56); // Select the des algorithm, the key length must be 56 -bit r
key key =. (); // generate key

// generate CIPHER object
cipher cipher = cipher. ("des");

// Use key encryption (message), generate ciphertexts ()
cipher.init (cipher.encrypt_mode, key); // The operating mode is encrypted (cipher.encrypt_mode), key is the key r
byte [] = cipher.dofinal (message.getbytes ()); // get the encrypted byte array
System.out.println ("encrypted information:" new string ());

// Plaintext with key text ()
cipher.init (cipher.DeCrypt_mode, Key); r n byte [] = cipher.dofinal (); // Obtain the after -decomposed byte array
system.out.println ("Clealing information:" new string ());
} catch (exception ex) {
ex. ();
}
}

}

/**
*@author devon
*/ n
import java. security.*;
import java.security.spec.*;
import javax.crypto.*;

public class {
position ARGV []) {
try {
string algorithm = "rsa"; // Define the encryption algorithm, you can use des, desede, blowfish
string message = "Zhang San, hello, I am, I am Li Si ";

// generate Zhang San's key pair ()
=
. ); // Specify the key length of 1024 bits
keypair =. (); // generate key pair
system.out.println ("Generate Zhang San's public key pair");

// Zhang Sanjian has become a public key () and sends it to Li Si. Here is the number of arrays by the public key
byte [] = .Getpublic (). ();

// Through the network or disk, the public key is transferred to Li Si
// Li Si received the public key after the Zhang San -encoded, and decoded it
=. (( Algorithm); // Objects
=
new (); // The public key uses x.509 encoding
publicKey =. Key
System.out.println ("Li Si Cheng Gong Decoding, get Zhang San's public key");

// Li Si used Zhang San's public key encryption information and sent it to it to Li Si
cipher cipher = cipher. ("RSA/ECB/"); // get the cipher object
cipher.init (cipher.encrypt_mode,);
byte [] = cipher.dofinal (message.getbytes ()); // Information
System.out.println ("" After -encrypted information: " new string ());
system.out.println (" encrypted, send it to Li Si ... ");

// Zhang San decrypts the information received from Li Si with his own private key
cipher.init (cipher.deCrypt_mode,. ()); Object
byte [] = cipher.dofinal (); // After getting decrypted information
system.out.println ("Zhang San received the information, after decryption is:" new string ());
} catch (exception ex) {
ex. ();
}
}
}

The old MD5 upstairs is easy to crack. Try me. It is the method of me in the Ministry of Public Security, the Taxation Bureau, and the project of insurance companies and banks. I wish you success!

import java.io.;
import java.security.;
import java.security.; (String [] art) {
dp = new ();
string md5psw = dp. ("123456");
system.out.println (md5psw);
}
}

Class {
private;
private string res);
private byte [] args = null;
String userpass) {
try {
// generates objects, pass the parameters of the algorithm used (md5)
=. ("Md5");
// Use Getbytes () Methods to generate string arrays
.update (userpass.getbytes ("gbk");
// The digest () method of executing objects completes the calculation, and the calculation results return through the array of byte types r r r r r r r r
args = .digest ();
} catch (e) {
e. ();
} catch (ee) {
ee. ();
} Finally {
.RESET ();
}

// Convert the result to string
result = "" "; // result empty, otherwise it will then it It will automatically add! Intersection Intersection
for (int i = 0; I u003Cargs.length; i ) {
result = integer. (