用户口令检查（/etc/passwd）

<?
/*
* etc.passwd.inc v1.0
*
* Syntax:
* verifypasswd(string USERNAME, string PASSWORD)
*
* The function will return one of three values:
* -2 if there was a file reading error
* -1 if the password is incorrect
* 0 if the username doesn@#t exist
* 1 if the password is correct
*
* Written by WarMage ( michael@irc.net )
*
*/

function verifypasswd (＄USERNAME, ＄PASSWORD) {

＄fd = fopen( "/etc/passwd", "r");
＄contents = fread(＄fd, filesize( "/etc/passwd"));
fclose(＄fd);
if (!＄contents) return -2;



＄lines = split( "\n", ＄contents);
＄passwd = array();

for(＄count=0;＄count<count(＄lines);＄count++) {
list (＄user,＄pass) = split( ":",＄lines[＄count]);
if (＄user == ＄USERNAME) {
break;
}
}

if (!＄user) return 0;

＄cryptedpass = ＄pass;
＄salt = substr(＄cryptedpass,0,2);
＄Pass = crypt(＄PASSWORD,＄salt);

if (＄Pass == ＄cryptedpass) {
return 1;
} else {
return -1;
}
}
?>

原文转自：http://www.ltesting.net