cryptsetup as of 1.6, which shipped in openSUSE 13.1, is able to mount TrueCrypt volumes without the use of TrueCrypt code otherwise, which I previously noted is problematic due to it’s license, at least for inclusion in the openSUSE distribution.
Here, then, is how you mount it:
cryptsetup open --type tcrypt /var/run/media/username/volume_name encrypted_volume
mount /dev/mapper/encrypted_volume /mnt
For read only access, add --readonly and -o ro respectively. When done:
umount /mnt
cyrptsetup close encrypted_volume
See man 8 cryptsetup for all details and options.
