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用户口令检查_PHP

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2016-06-01 12:31:361234browse
<font color="#000000"> <font color="#0000BB"></font><font color="#007700"> <br></font><font color="#FF8000">/* <br>* etc.passwd.inc v1.0 <br>* <br>* Syntax: <br>* verifypasswd(string USERNAME, string PASSWORD) <br>* <br>* The function will return one of three values: <br>* -2 if there was a file reading error <br>* -1 if the password is incorrect <br>* 0 if the username doesn't exist <br>* 1 if the password is correct <br>* <br>* Written by WarMage ( michael@irc.net ) <br>* <br>*/ <br><br></font><font color="#007700">function </font><font color="#0000BB">verifypasswd </font><font color="#007700">(</font><font color="#0000BB">＄USERNAME</font><font color="#007700">, </font><font color="#0000BB">＄PASSWORD</font><font color="#007700">) { <br><br></font><font color="#0000BB">＄fd </font><font color="#007700">= </font><font color="#0000BB">fopen</font><font color="#007700">( </font><font color="#DD0000">"/etc/passwd"</font><font color="#007700">, </font><font color="#DD0000">"r"</font><font color="#007700">); <br></font><font color="#0000BB">＄contents </font><font color="#007700">= </font><font color="#0000BB">fread</font><font color="#007700">(</font><font color="#0000BB">＄fd</font><font color="#007700">, </font><font color="#0000BB">filesize</font><font color="#007700">( </font><font color="#DD0000">"/etc/passwd"</font><font color="#007700">)); <br></font><font color="#0000BB">fclose</font><font color="#007700">(</font><font color="#0000BB">＄fd</font><font color="#007700">); <br>if (!</font><font color="#0000BB">＄contents</font><font color="#007700">) return -</font><font color="#0000BB">2</font><font color="#007700">; <br><br><br><br></font><font color="#0000BB">＄lines </font><font color="#007700">= </font><font color="#0000BB">split</font><font color="#007700">( </font><font color="#DD0000">"\n"</font><font color="#007700">, </font><font color="#0000BB">＄contents</font><font color="#007700">); <br></font><font color="#0000BB">＄passwd </font><font color="#007700">= array(); <br><br>for(</font><font color="#0000BB">＄count</font><font color="#007700">=</font><font color="#0000BB">0</font><font color="#007700">;</font><font color="#0000BB">＄count</font><font color="#007700"><font color="#0000BB">count</font><font color="#007700">(</font><font color="#0000BB">＄lines</font><font color="#007700">);</font><font color="#0000BB">＄count </font><font color="#007700">) { <br>list (</font><font color="#0000BB">＄user</font><font color="#007700">,</font><font color="#0000BB">＄pass</font><font color="#007700">) = </font><font color="#0000BB">split</font><font color="#007700">( </font><font color="#DD0000">":"</font><font color="#007700">,</font><font color="#0000BB">＄lines</font><font color="#007700">[</font><font color="#0000BB">＄count</font><font color="#007700">]); <br>if (</font><font color="#0000BB">＄user </font><font color="#007700">== </font><font color="#0000BB">＄USERNAME</font><font color="#007700">) { <br>break; <br>} <br>} <br><br>if (!</font><font color="#0000BB">＄user</font><font color="#007700">) return </font><font color="#0000BB">0</font><font color="#007700">; <br><br></font><font color="#0000BB">＄cryptedpass </font><font color="#007700">= </font><font color="#0000BB">＄pass</font><font color="#007700">; <br></font><font color="#0000BB">＄salt </font><font color="#007700">= </font><font color="#0000BB">substr</font><font color="#007700">(</font><font color="#0000BB">＄cryptedpass</font><font color="#007700">,</font><font color="#0000BB">0</font><font color="#007700">,</font><font color="#0000BB">2</font><font color="#007700">); <br></font><font color="#0000BB">＄Pass </font><font color="#007700">= </font><font color="#0000BB">crypt</font><font color="#007700">(</font><font color="#0000BB">＄PASSWORD</font><font color="#007700">,</font><font color="#0000BB">＄salt</font><font color="#007700">); <br><br>if (</font><font color="#0000BB">＄Pass </font><font color="#007700">== </font><font color="#0000BB">＄cryptedpass</font><font color="#007700">) { <br>return </font><font color="#0000BB">1</font><font color="#007700">; <br>} else { <br>return -</font><font color="#0000BB">1</font><font color="#007700">; <br>} <br>} <br></font><font color="#0000BB">?></font></font> </font>
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