Thursday Feb 26, 2009

Truecrypt on OpenSolaris

Recently I've been playing around with TrueCrypt on Solaris. TrueCrypt is a cross-platform (Linux, MacOS, Windows, FreeBSD) application which provides disk encryption. On the non-windows platforms it uses FUSE.

As I've been involved with getting FUSE ported to OpenSolaris and work on security technologies for Sun it seemed to be a suitable project. Porting TrueCrypt to Solaris hasn't been entirely straightforward.

Apart from all the usual issues with OS specific code, TrueCrypt is also a C++ application which uses wxWidgets. Luckily for me wxWidgets is now included in later builds of OpenSolaris so I didn't need to port that, unluckily for me the GNU C++ compiler ABI and the Solaris C++ compiler ABI are incompatible which meant that I had to port TrueCrypt to SunStudio. Not only had I to contend with TrueCrypt but FUSE on Solaris is also relatively immature and I hit a number of issues (including panics) when trying to make FUSE and TrueCrypt work well together. The relevant FUSE bugs (fixed a week or two ago) are 4067, 3523 and 6441.

The port is by no means finished, in fact there are still some major problems but I have managed to get as far as creating a new volume, mounting that volume and reading and writing data. Here's a screen-shot:

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