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我正在 Objective C 中寻找一组类似的加密函数，以便 IOS 与我的 PHP Web 服务集成。

以下是 PHP 加密函数：

public function encrypt($input, $key) {
    $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
    $input = self::pkcs5_pad($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, $key, $iv);
    $data = mcrypt_generic($td, $input);
    mcrypt_generic_deinit($td);
    mcrypt_module_close($td);
    $data = base64_encode($data);
    return $data;
}

private function pkcs5_pad ($text, $blocksize) {
    $pad = $blocksize - (strlen($text) % $blocksize);
    return $text . str_repeat(chr($pad), $pad);
}

public function decrypt($sStr, $sKey) {
    $decrypted= mcrypt_decrypt(
    MCRYPT_RIJNDAEL_128,
    $sKey,
    base64_decode($sStr),
    MCRYPT_MODE_ECB
    );
    $dec_s = strlen($decrypted);
    $padding = ord($decrypted[$dec_s-1]);
    $decrypted = substr($decrypted, 0, -$padding);
    return $decrypted;
}

以下是与之匹配的android / JAVA函数：

public static String encrypt(String input, String key){
    byte[] crypted = null;
    try{
        SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skey);
        crypted = cipher.doFinal(input.getBytes());
    } catch(Exception e) {
        //Log.e("ERR", e.toString());
    }
    return new String(Base64.encode(crypted, Base64.DEFAULT));
}

public static String decrypt(String input, String key){
    byte[] output = null;
    try{
        SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, skey);
        output = cipher.doFinal(Base64.decode(input, Base64.DEFAULT));
    } catch(Exception e) {
    //Log.e("ERR", e.toString());
    }
    return new String(output);
}

IOS / 目标 C 的匹配函数是什么，以便无需对后端 PHP 进行更改即可正确匹配？谢谢！！！

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