PHP使用DES进行加密与解密的方法

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);

$key = substr(md($key) );

$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(base_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);

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

$td = mcrypt_module_open(tripledes ecb );

$key = substr(md($key) );

$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($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));

}