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Encrypt and Decrypt using AES

I am trying to get basic string encryption and decryption exposed to my blueprints. And was wondering if I am doing it right. I currently have this:

 FString UCustomExtensions::Encrypt(FString data, FString key) {

     if (data.IsEmpty() || key.IsEmpty()) {
         return "";

     FBufferArchive binArchive;
     binArchive << data;

     int32 size = binArchive.Num();
     uint8* encrypted = new uint8[size];
     FMemory::Memcpy(encrypted, binArchive.GetData(), size);

     const TCHAR* charkey = key.GetCharArray().GetData();
     FAES::EncryptData(encrypted, size, TCHAR_TO_ANSI(charkey));

     TArray<uint8> encryptedArray;
     encryptedArray.Append(encrypted, size);
     FString ret = FString::FromHexBlob(encrypted,size);
     delete encrypted;

     return ret;

as encryption. It seems to produce consistent result. I am curious how could one decrypt this string? In particular the problem I am having is getting this string converted back into binary blob for further decryption.

Any help is appreciated.

Product Version: UE 4.8
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asked Aug 27 '15 at 06:43 AM in C++ Programming

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Did you find a solution for this? I am also interested.

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answered May 23 '16 at 03:51 PM

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avatar image mxnko May 23 '16 at 03:53 PM

@JavierRamello, yes, kind of. I've packaged libsodium as UE4 plugin. You can check it out here:


Only public, and authenticated public functionality is exposed to blueprint right now. Only tested on windows.

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