无法在C＃bouncycastle和PHP openssl之间交换AES-256-CBC / PKCS7

因此，我在C＃和PHP中具有以下代码，到目前为止，结果在双方之间均不一致。对于C＃，我正在使用充气城堡API，对于PHP，我正在使用openSSL。可以肯定的是，我还使用Microsoft Crypto Library在C＃中对相同的事物进行了加密，并且得到了相同的密文，但是当它们与PHP交换时却没有。

C＃

    public const string AES_ALGORITHM = "AES/CBC/PKCS7";
    public const string CRYPTO_ALGORITHM = "AES";
    public AESController(string key) {
        encryptionKey = Convert.FromBase64String(key);
    }
    public string encrypt(string plainText, byte[] iv) {
        string cipherText = "";
        //setting up AES Key
        KeyParameter aesKeyParam = ParameterUtilities.CreateKeyParameter(CRYPTO_ALGORITHM, encryptionKey);

        // Setting up the Initialization Vector. IV is used for encrypting the first block of input message
        ParametersWithIV aesIVKeyParam = new ParametersWithIV(aesKeyParam, iv);

        // Create the cipher object for AES algorithm using GCM mode and NO padding
        IBufferedCipher cipher = CipherUtilities.GetCipher(AES_ALGORITHM);
        cipher.Init(true, aesIVKeyParam);

        byte[] output = cipher.DoFinal(Encoding.UTF8.GetBytes(plainText));

        cipherText = Convert.ToBase64String(output);
        return cipherText;
    }

    public string decrypt(string cipherText, byte[] iv) {
        string plainText = "";
        //setting up AES Key
        KeyParameter aesKeyParam = ParameterUtilities.CreateKeyParameter(CRYPTO_ALGORITHM, encryptionKey);

        // Setting up the Initialization Vector. IV is used for encrypting the first block of input message
        ParametersWithIV aesIVKeyParam = new ParametersWithIV(aesKeyParam, iv);

        // Create the cipher object for AES algorithm using GCM mode and NO padding
        IBufferedCipher cipher = CipherUtilities.GetCipher(AES_ALGORITHM);
        cipher.Init(false, aesIVKeyParam);


        byte[] output = cipher.DoFinal(Convert.FromBase64String(cipherText));

        plainText = Encoding.UTF8.GetString(output);
        return plainText;
    }

     static void Main(string[] args) {
        AESController aes = new AESController("OXzN4fxHHgcKtAt/SJ4UWtNiQlzno7II1gIBs24CWpY=");
        byte[] iv = Base64.Decode("fdL8sKmhC8YIrYHMzoJJvQ==");
        string encryptedText = "TESTING123";

        string cipherText = aes.encrypt(encryptedText, iv);
        Console.Out.WriteLine("IV: " + Encoding.UTF8.GetString(Base64.Encode(iv)));
        Console.Out.WriteLine("Plain Text:"+aes.decrypt(cipherText, iv));
        Console.Out.WriteLine("Cipher Text:" + cipherText);

        Console.In.ReadLine();
    }

然后是PHP：

    $key = "OXzN4fxHHgcKtAt/SJ4UWtNiQlzno7II1gIBs24CWpY=";
    $iv = base64_decode("fdL8sKmhC8YIrYHMzoJJvQ==");
    //$iv = openssl_random_pseudo_bytes(16);
    //$cipherText = "YMdJ0mdWZ+p50krLzhyI0Q==";
    $plainText = "TESTING123";
    $decrypted = openssl_encrypt($plainText, "aes-256-cbc", $key, 0, $iv);

    var_dump($decrypted);

因此，来自C＃bouncycastle的密文为：

EnOtpv4fOGiAKMzXXJMYBA ==

来自PHP的密文为：

Cs + f7a / DBEGma7iQ / PQVLw ==

如果我将c＃密文带到PHP，则解密结果为：bool（False）（加密失败）

最后，如果在PHP中，我将填充更改为OPENSSL_ZERO_PADDING，然后从C＃解密密文，则结果为：

__XXGmNSlZx。

对于我可以收集到的信息，密钥和IV都相同（都是BASE64字符串），加密的结果具有相同的长度（这在密文末尾解释了两个==。我有什么想念的吗？ ，或者我需要对openssl库做一些特别的事情吗？