PHP使用DES进行加密与解密的方法

来源：互联网   发布日期：2016-03-02 15:35:02   浏览：2160次  

代码如下:

//$input - stuff to decrypt

//$key - the secret key to use

function do_mencrypt($input, $key)

{

$input = str_replace(""n", "", $input);

$input = str_replace(""t", "", $input);

$input = str_replace(""r", "", $input);

$key = substr(md5($key), 0, 24);

$td = mcrypt_module_open('tripledes', '', 'ecb', '');

$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

mcrypt_generic_init($td, $key, $iv);

$encrypted_data = mcrypt_generic($td, $input);

mcrypt_generic_deinit($td);

mcrypt_module_close($td);

return trim(chop(base64_encode($encrypted_data)));

}

//$input - stuff to decrypt

//$key - the secret key to use

function do_mdecrypt($input, $key)

{

$input = str_replace(""n", "", $input);

$input = str_replace(""t", "", $input);

$input = str_replace(""r", "", $input);

$input = trim(chop(base64_decode($input)));

$td = mcrypt_module_open('tripledes', '', 'ecb', '');

$key = substr(md5($key), 0, 24);

$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

mcrypt_generic_init($td, $key, $iv);

$decrypted_data = mdecrypt_generic($td, $input);

mcrypt_generic_deinit($td);

mcrypt_module_close($td);

return trim(chop($decrypted_data));

}

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