misc_funcs.php

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<?php
/*
  $Id: password_funcs.php,v 1.7 2001/12/14 16:13:23 dgw_ Exp $

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Copyright (c) 2001,2003 网络商店

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*/

function validate_password($plain_pass, $db_pass){
     
     /*Quick test to let this work on unencrypted passwords and NULL
     Passwords*/
     if($plain_pass == $db_pass){
     	return(true);
     }
     
     /* split apart the hash / salt*/
     if(!($subbits = split(":", $db_pass, 2))){
     	return(false);
    }
    
    $dbpassword = $subbits[0];
    $salt = $subbits[1];
    
    $passtring = $salt . $plain_pass;
    
    $encrypted = md5($passtring);
    if(strcmp($dbpassword, $encrypted) == 0)
    {
	return(true);
    }else{
	return(false);
    }
} // function validate_password($plain_pass, $db_pass)

/*  This function makes a new password from a plaintext password. An
*   encrypted password + salt is returned */

function crypt_password($plain_pass){
    /* create a semi random salt */
    mt_srand ((double) microtime() * 1000000);
    for($i=0;$i<10;$i++){
     $tstring	.= mt_rand();
    }
    
    $salt = substr(md5($tstring),0, 2);
    
    $passtring = $salt . $plain_pass;
    
    $encrypted = md5($passtring);
    
    return($encrypted . ":" . $salt);
} // function crypt_password($plain_pass)

?>