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<?php
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class aesLanhai{}
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/**
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* 使用旧的mcrypt来写，澜海加解密类
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*/
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class Security {
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private $key;
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public function __construct() {
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$CI =& get_instance();
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$CI->load->config();
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$this->key = LANHAI_KEY;
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//$this->key = "999c1DtJJ4pEbcxeEqJBKw==";
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}
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public function encryptData($input) {
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$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
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$input = Security::pkcs5_pad($input, $size);
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$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
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$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
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mcrypt_generic_init($td, $this->key, $iv);
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$data = mcrypt_generic($td, $input);
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mcrypt_generic_deinit($td);
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mcrypt_module_close($td);
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$data = base64_encode($data);
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return $data;
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}
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private static function pkcs5_pad ($text, $blocksize) {
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$pad = $blocksize - (strlen($text) % $blocksize);
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return $text . str_repeat(chr($pad), $pad);
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}
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public function decryptData($sStr) {
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$decrypted= mcrypt_decrypt(
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MCRYPT_RIJNDAEL_128,
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$this->key,
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base64_decode($sStr),
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MCRYPT_MODE_ECB
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);
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$dec_s = strlen($decrypted);
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$padding = ord($decrypted[$dec_s-1]);
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$decrypted = substr($decrypted, 0, -$padding);
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return $decrypted;
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}
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}
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