lccsw
57 lines
1.6 KiB
PHP
57 lines
1.6 KiB
PHP
<?php
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class DESede{
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/**
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* 加密
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* @param $data 待加密明文
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* @param $key DES私钥
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* @param $use3des 是否启用3DES加密，默认不启用
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*/
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public function encrypt($data='', $key='', $use3des = False){
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if (empty($data) || empty($key))
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{
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return False;
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}
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$cipher = $use3des ? MCRYPT_TRIPLEDES : MCRYPT_DES;
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$modes = MCRYPT_MODE_ECB;
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# Add PKCS7 padding.
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$block = mcrypt_get_block_size($cipher, $modes);
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$pad = $block - (strlen($data) % $block);
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$data .= str_repeat(chr($pad), $pad);
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$iv = mcrypt_create_iv(mcrypt_get_iv_size($cipher, $modes), MCRYPT_RAND);
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$encrypted = @mcrypt_encrypt($cipher, $key, $data, $modes, $iv);
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return $encrypted;
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}
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/**
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* 解密
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* @param $data 待解密密文
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* @param $key DES私钥
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* @param $use3des 是否启用3DES加密，默认不启用
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*/
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public function decrypt($data='', $key='', $use3des = False){
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if (empty($data) || empty($key))
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{
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return False;
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}
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$cipher = $use3des ? MCRYPT_TRIPLEDES : MCRYPT_DES;
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$modes = MCRYPT_MODE_ECB;
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$iv = mcrypt_create_iv(mcrypt_get_iv_size($cipher, $modes), MCRYPT_RAND);
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$data = @mcrypt_decrypt($cipher, $key, $data, $modes, $iv);
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# Strip padding out.
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$block = mcrypt_get_block_size($cipher, $modes);
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$pad = ord($data[($len = strlen($data)) - 1]);
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$decrypted = substr($data, 0, strlen($data) - $pad);
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return $decrypted;
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}
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}
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?>
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