Strange Bug

[Chris M. via Digitalmars-d-learn]

On Friday, 20 January 2017 at 11:58:39 UTC, Rene Zwanenburg wrote:
> On Friday, 20 January 2017 at 08:19:57 UTC, Chris M. wrote:
>> [...]
>
> My guess:
>
> The encrypted output will be a bit longer than your input. 
> You're not getting an out of bounds exception during encryption 
> since OpenSSL only has the pointer to write to, not a buffer 
> length it can check. The memory behind your buffer is 
> apparently committed, and will be written to by OpenSSL. This 
> is why using the same buffer to decrypt works: it continues to 
> read after the end of the buffer. (In case it's not clear, 
> writing and reading past the end of the buffer is really bad)
>
> I expect OpenSSL to have a helper function to calculate the 
> required buffer size for a given input length. Use that to 
> allocate the buffer.

Turns out that was the issue, I needed to reserve more space for 
the encrypted string with this
cipherLen = (clearLen/16 + 1) * 16;
The fun of working with C libraries

Anyway, thanks for the help