(PowerBuilder) AES Encryption ECB Mode with PKCS7 Padding

Duplicates the following C# code:

public static byte[] DecryptBySymmetricKey(string encryptedText, byte[] key)
  {
     string keyAsBase64 = Convert.ToBase64String(key);

     byte[] dataToDecrypt = Convert.FromBase64String(encryptedText);
     var keyBytes = key;
     AesManaged tdes = new AesManaged();
     tdes.KeySize = 256;
     tdes.BlockSize = 128;
     tdes.Key = keyBytes;
     tdes.Mode = CipherMode.ECB;
     tdes.Padding = PaddingMode.PKCS7;
     ICryptoTransform decrypt__1 = tdes.CreateDecryptor();
     byte[] deCipher = decrypt__1.TransformFinalBlock(dataToDecrypt, 0, dataToDecrypt.Length);
     tdes.Clear();
     string EK_result = Convert.ToBase64String(deCipher);
     return EK_result;
}

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Crypt
string ls_KeyAsBase64
string ls_EncryptedBytesAsBase64
string ls_EK_result

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_Crypt = create oleobject
// Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// In the C# code above that is to be duplicated here, use the base64 encoded key.
ls_KeyAsBase64 = "..."
ls_EncryptedBytesAsBase64 = "...."

loo_Crypt.KeyLength = 256
loo_Crypt.CryptAlgorithm = "AES"
loo_Crypt.CipherMode = "ecb"
loo_Crypt.PaddingScheme = 0
loo_Crypt.SetEncodedKey(ls_KeyAsBase64,"base64")

loo_Crypt.EncodingMode = "base64"

// Pass the base64 representation of the encrypted data.
// (The EncodingMode indicates you are passing base64.)
ls_EK_result = loo_Crypt.DecryptStringENC(ls_EncryptedBytesAsBase64)

Write-Debug ls_EK_result


destroy loo_Crypt