aes 加密 解密

//aes key 
function aesKey(){
    return '1111111111265478';
}
//aes 加密 
function encrypt($input = '') {
    $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
    $input = pkcs5_pad($input, $size);
    $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
    $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
    mcrypt_generic_init($td, aesKey(), $iv);

    $data = mcrypt_generic($td, $input);
    mcrypt_generic_deinit($td);
    mcrypt_module_close($td);
    $data = base64_encode($data);
    return $data;
}
//aes 填充方式 
function pkcs5_pad($text, $blocksize) {
    $pad = $blocksize - (strlen($text) % $blocksize);
    return $text . str_repeat(chr($pad), $pad);
}
//aes 解密 
function decrypt($sStr) {
    $decrypted= mcrypt_decrypt(MCRYPT_RIJNDAEL_128,aesKey(),base64_decode($sStr), MCRYPT_MODE_ECB);
    $dec_s = strlen($decrypted);
    $padding = ord($decrypted[$dec_s-1]);
    $decrypted = substr($decrypted, 0, -$padding);
    return $decrypted;
}