I thought it might be openssl, as that is what the error indicated. However, it looks like Ubuntu comes with openssl installed. The dev library needs to be added. Following installation, Hydan compiles.
So, I've tried working on a file that I know has text hidden in it, and I receive the following error(?):
hdn_crypto_decrypt: Error allocating memory for duplicating decryption. Requested -77012715 bytes.
What I'm unsure of is this: Is there another problem with Hydan, or is there an issue with running on Ubuntu.