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64 lines
1.6 KiB
PHP
64 lines
1.6 KiB
PHP
<?PHP
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// PHP encrypt decrypt using base64
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// v1 (2013-04-14)
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// http://www.geocontext.org/publ/2013/04/base64_encrypt_decrypt/
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// Krystian Pietruszka
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// www.geocontext.org
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// info@geocontext.org
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// Public domain license
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// Adapted by Bergware for use in Unraid
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// forced use of hash key
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/*
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Example encrypt:
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base64_encrypt('AuthPass');
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Example decrypt:
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base64_decrypt('AuthPass');
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*/
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$abc = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
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$key = 'unraid#hash#key';
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function base64_encrypt($pw) {
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global $abc, $key;
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$s = '';
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$a = str_split('+/='.$abc);
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$b = str_split(mixing_key(strrev('-_='.$abc), $key));
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$t = str_split(base64_encode(substr(md5($key),0,16).$pw));
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for ($i=0; $i<count($t); $i++) for ($j=0; $j<count($a); $j++) {
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if ($t[$i]==$a[$j]) $s .= $b[$j];
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}
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return $s;
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}
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function base64_decrypt($pw) {
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global $abc, $key;
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$s = '';
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$a = str_split('+/='.$abc);
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$b = str_split(mixing_key(strrev('-_='.$abc), $key));
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$t = str_split($pw);
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for ($i=0; $i<count($t); $i++) for ($j=0; $j<count($b); $j++) {
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if ($t[$i]==$b[$j]) $s .= $a[$j];
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}
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$s = base64_decode($s);
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// return decrypted or plain password (backward compability)
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return substr($s,0,16)==substr(md5($key),0,16) ? substr($s,16) : $pw;
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}
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function mixing_key($b, $key) {
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$s = '';
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$c = $b;
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$t = str_split($b);
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$k = str_split(sha1($key));
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for ($i=0; $i<count($k); $i++) for ($j=0; $j<count($t); $j++) {
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if ($k[$i]==$t[$j]) {
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$c = str_replace($t[$j],'',$c);
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if (!preg_match('/'.$t[$j].'/',$s)) $s .= $t[$j];
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}
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}
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return $c.$s;
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}
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?>
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