Lua

AES Encryption ECB Mode with PKCS7 Padding

See more Encryption Examples

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;
}

Lua

local chilkat = require("chilkat")

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

local crypt = chilkat.Crypt2.new()

-- In the C# code above that is to be duplicated here, use the base64 encoded key.
local keyAsBase64 = "..."
local encryptedBytesAsBase64 = "...."

crypt.key_length = 256
crypt.crypt_algorithm = "AES"
crypt.cipher_mode = "ecb"
crypt.padding_scheme = 0
crypt:set_encoded_key(keyAsBase64, "base64")

crypt.encoding_mode = "base64"

-- Pass the base64 representation of the encrypted data.
-- (The EncodingMode indicates you are passing base64.)
local EK_result = crypt:decrypt_string_enc(encryptedBytesAsBase64)

print(EK_result)