Previously, the code was relying on `file` and `dmsetup` to detect
encrypted swaps, but it was missing plain swaps on encrypted
volumes. Using `lsblk` adds this detection and simplifies the test.
Thanks @fsLeg for reporting the issue, and @boyska for fixing it.
Commit 5dbcabdf26 removed the `chown` call
in `_tmp_create()` but not the associated error message. This commit
removes that error message since it is just dead code.
This commit refactors the handling of password input by eliminating
all intermediary programs and relying only on ZSh, hence improving
overall security against rootkits and such.
Also the way sudo is used is now greatly simplified and there is no
privilege escalation at boot: sudo is executed inside Tomb by being
prefixed in front of those programs needing it.
All tests passed.
swish-e now creates a .swishrc config file inside the tomb so that
users can tweak its configuration by hand.
whoami() is also cleaned up, pending a fix for slackware usage.
A tempfile was often used by Tomb in order to parse the stderr output of
gpg and detect if the password is correct or not. The tempfile was not
holding any secret information (see #162) yet this is an improvement for
Tomb's deniability since there is now much less going on in the temp
firectory.
Added the --tmp flag for manual selection of the temporary directory, whose security should really be up to sysadmins when configuring operating systems. Default is ZSh TMPPREFIX usually set to /tmp/zsh which, if not existing, will be created as world writable with a sticky bit.
This commit also includes a cleanup of commandline options and a fix to swap check.
Now there is no more writing of cleartext secrets in any tempfile,
the last case was in setkey and is now eliminated. Tempfile creation
is cleaner. Related to issue #162
