PHP小记｜xxtea类
xxtea可逆加密算法PHP实现：
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Class Xxtea { public function encrypt($s, $key) { return base64_encode(self :: xxtea_encrypt($s, $key)); } public function decrypt($e, $key) { return self :: xxtea_decrypt(base64_decode($e), $key); } private function long2str($v, $w) { $len = count($v); $n = ($len -1) << 2; if ($w) { $m = $v[$len -1]; if (($m $n)) return false; $n = $m; } $s = array (); for ($i = 0; $i = 2147483648) $n -= 4294967296; while ($n <= -2147483649) $n += 4294967296; return (int) $n; } private function xxtea_encrypt($str, $key) { if ($str == "") { return ""; } $v = self :: str2long($str, true); $k = self :: str2long($key, false); if (count($k) < 4) { for ($i = count($k); $i < 4; $i++) { $k[$i] = 0; } } $n = count($v) - 1; $z = $v[$n]; $y = $v[0]; $delta = 0x9E3779B9; $q = floor(6 + 52 / ($n +1)); $sum = 0; while (0 > 2 & 3; for ($p = 0; $p > 5 & 0x07ffffff) ^ $y <> 3 & 0x1fffffff) ^ $z <> 5 & 0x07ffffff) ^ $y <> 3 & 0x1fffffff) ^ $z << 4)) ^ self :: int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z)); $z = $v[$n] = self :: int32($v[$n] + $mx); } return self :: long2str($v, false); } private function xxtea_decrypt($str, $key) { if ($str == "") { return ""; } $v = self :: str2long($str, false); $k = self :: str2long($key, false); if (count($k) < 4) { *本5文来源gaodai$ma#com搞$$代**码)网@![]()
搞代码gaodaima for ($i = count($k); $i > 2 & 3; for ($p = $n; $p > 0; $p--) { $z = $v[$p -1]; $mx = self :: int32((($z >> 5 & 0x07ffffff) ^ $y <> 3 & 0x1fffffff) ^ $z <> 5 & 0x07ffffff) ^ $y <> 3 & 0x1fffffff) ^ $z << 4)) ^ self :: int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z)); $y = $v[0] = self :: int32($v[0] - $mx); $sum = self :: int32($sum - $delta); } return self :: long2str($v, true); }}
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使用方法：
加密：
Xxtea::encrypt(明文字符串, 密钥字符串);
解密：
Xxtea::decrypt(密文字符串, 密钥字符串);
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转载请注明原文链接：PHP初记｜xxtea类
转载请注明原文链接：PHP初记｜xxtea类
