password.java.htm

来自「JAVA的加密源程序」· HTM 代码 · 共 40 行

HTM

40 行

<html>/*Christoforos Pirillos @ Villanova University - May 1999based on code from the book "Java Network Programming" by Hughes*/package encryption;/**Generates keys from passwords*/public  class Password {/**Converts the supplied String into an array of bytes and returns adigest of this*/public static long keyFromPassword (String password) {	byte[] passwordBytes = new byte[password.length()*2];	for (int i =0; i<password.length();++i) {		char c=password.charAt(i);	passwordBytes[i*2]=(byte) (c>>8);	passwordBytes[i*2+1]=(byte) c;	}	SHS hash = new SHS();	byte[] keyBytes = hash.digest (passwordBytes);	return Crypt.bytesToLong(keyBytes,0);}/**Returns the next key from the digest*/public static long nextKeyFromPassword (String password) {	byte[] passwordBytes = new byte[password.length()*2];	for (int i =0;i<password.length(); ++i) {		char c=password.charAt(i);		passwordBytes[i*2]=(byte)(c>>8);		passwordBytes[i*2+1]=(byte) c;	}	SHS hash = new SHS();	byte[] keyBytes=hash.digest(passwordBytes);	return Crypt.bytesToLong(keyBytes,8);}}/*end of class*/

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