问在php和vb.net中加密和解密AES 256

EN

Imports System.IO
Imports System.Text
Imports System.Security.Cryptography


Public Class tbSecurity

Public Shared enckey = "00000000000000000000000000000000"
Public Shared Function AESEncryptStringToBase64(strPlainText As String) As String
    Dim Algo As RijndaelManaged = RijndaelManaged.Create()

    With Algo
        .BlockSize = 128
        .FeedbackSize = 128
        .KeySize = 256
        .Mode = CipherMode.CBC
        .IV = Guid.NewGuid().ToByteArray()
        .Key = Encoding.ASCII.GetBytes(enckey)
    End With

    Using Encryptor As ICryptoTransform = Algo.CreateEncryptor()
        Using MemStream As New MemoryStream
            Using CryptStream As New CryptoStream(MemStream, Encryptor, CryptoStreamMode.Write)
                Using Writer As New StreamWriter(CryptStream)
                    Writer.Write(strPlainText)
                End Using

                AESEncryptStringToBase64 = Convert.ToBase64String(Algo.IV.Concat(MemStream.ToArray()).ToArray())
            End Using
        End Using
    End Using
End Function

Public Shared Function AESDecryptBase64ToString(strCipherText As String) As String
    Dim arrSaltAndCipherText As Byte() = Convert.FromBase64String(strCipherText)

    Dim Algo As RijndaelManaged = RijndaelManaged.Create()

    With Algo
        .BlockSize = 128
        .FeedbackSize = 128
        .KeySize = 256
        .Mode = CipherMode.CBC
        .IV = arrSaltAndCipherText.Take(16).ToArray()
        .Key = Encoding.ASCII.GetBytes(enckey)
    End With

    Using Decryptor As ICryptoTransform = Algo.CreateDecryptor()
        Using MemStream As New MemoryStream(arrSaltAndCipherText.Skip(16).ToArray())
            Using CryptStream As New CryptoStream(MemStream, Decryptor, CryptoStreamMode.Read)
                Using Reader As New StreamReader(CryptStream)
                    AESDecryptBase64ToString = Reader.ReadToEnd()
                End Using
            End Using
        End Using
    End Using
End Function

End Class

<?php
$inputstr = $_GET['str'];
 
$ky = '00000000000000000000000000000000'; // 32 * 8 = 256 bit key
$iv = '1234567890123456'; // 32 * 8 = 256 bit iv

echo "<hr>";
echo "Input Str = " . $inputstr;
echo "<hr>";
echo "Decrypted Str = " . decryptRJ256($ky,$iv,$inputstr);

function decryptRJ256($key,$iv,$string_to_decrypt)
{
    $string_to_decrypt = base64_decode($string_to_decrypt);
    $rtn = openssl_decrypt($string_to_decrypt, "aes-256-cbc", $key,0,$iv); 
    $rtn = rtrim($rtn, "\0\4");
    return($rtn);
}

function encryptRJ256($key,$iv,$string_to_encrypt)
{
    $rtn = openssl_decrypt($string_to_encrypt, "aes-256-cbc", $key,0,$iv); 
    $rtn = base64_encode($rtn);
    return($rtn);
}    
?>