41 lines
965 B
PHP
41 lines
965 B
PHP
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<?php
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/**
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* Created by PhpStorm.
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* User: ayisun
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* Date: 2016/10/2
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* Time: 10:02
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*/
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class decrypt_data
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{
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/**
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* @param $encrypt_data
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* @param $session_key
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* @return bool|string
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* 描述：解密数据
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*/
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public function aes128cbc_Decrypt($encrypt_data, $session_key)
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{
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$aeskey = base64_decode($session_key);
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$iv = $aeskey;
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$encryptedData = base64_decode($encrypt_data);
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$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $aeskey, $encryptedData, MCRYPT_MODE_CBC, $iv);
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return $this->stripPkcs7Padding($decrypted);
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}
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/**
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* 对解密后的明文进行补位删除
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* @param text 解密后的明文
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* @return 删除填充补位后的明文
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*/
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function stripPkcs7Padding($text)
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{
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$pad = ord(substr($text, -1));
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if ($pad < 1 || $pad > 32) {
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$pad = 0;
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}
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return substr($text, 0, (strlen($text) - $pad));
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}
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}
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