AES encryption with openssl bindings

[Justin Whear via Digitalmars-d-learn]

On Fri, 25 Apr 2014 19:06:31 +0000, brad clawsie wrote:

> hi everyone.
> 
> I'm trying to symmetrically encrypt some text using the openssl
> bindings. My code compiles and fails silently. Clearly there is
> something very wrong with it - it could be my novice D skills, or my
> misuse of the openssl binding.
> 
>      auto chunk = new ubyte[](16);
>      foreach(ref x; chunk) x = uniform!"[]"(ubyte.min, ubyte.max);
>      AES_KEY wctx;
>      AES_set_encrypt_key(chunk.ptr,128,&wctx);
> 
>      string s = "virident";
>      ubyte[] b;
>      b = cast(ubyte[]) s;
>      ubyte[] e;
>      AES_encrypt(b.ptr,e.ptr,&wctx);
>      ubyte[] d;
>      AES_decrypt(e.ptr,d.ptr,&wctx);
>      writefln("%s",d);
> 
> 
> Any clues? I am a D novice, so any spoonfeeding you could provide would
> be helpful :)
> 
> thanks!
> Brad

It doesn't look like you're allocating space for `e` or `d`, e.g. `auto e 
= new ubyte[](256);`, so those arrays have a length of 0, in which case 
the encrypt/decrypt functions are just trashing their way through memory.