#!/bin/sh -e
# This script mounts a user's confidential private folder
#
# Original by Michael Halcrow, IBM
# Extracted to a stand-alone script by Dustin Kirkland <[email protected]>
#
# This script:
# * interactively prompts for a user's wrapping passphrase (defaults to their
# login passphrase)
# * checks it for validity
# * unwraps a users mount passphrase with their supplied wrapping passphrase
# * inserts the mount passphrase into the keyring
# * and mounts a user's encrypted private folder

PRIVATE_DIR="Private"
WRAPPING_PASS="LOGIN"
PW_ATTEMPTS=3
TEXTDOMAIN="ecryptfs-utils"
MESSAGE=`gettext "Enter your login passphrase:"`

if [ -f $HOME/.ecryptfs/wrapping-independent ]; then
# use a wrapping passphrase different from the login passphrase
WRAPPING_PASS="INDEPENDENT"
MESSAGE=`gettext "Enter your wrapping passphrase:"`
fi

WRAPPED_PASSPHRASE_FILE="$HOME/.ecryptfs/wrapped-passphrase"
MOUNT_PASSPHRASE_SIG_FILE="$HOME/.ecryptfs/$PRIVATE_DIR.sig"

# First, silently try to perform the mount, which would succeed if the appropriate
# key is available in the keyring
if /sbin/mount.ecryptfs_private >/dev/null 2>&1; then
exit 0
fi

# Otherwise, interactively prompt for the user's password
if [ -f "$WRAPPED_PASSPHRASE_FILE" -a -f "$MOUNT_PASSPHRASE_SIG_FILE" ]; then
tries=0
stty_orig=`stty -g`
while [ $tries -lt $PW_ATTEMPTS ]; do
echo -n "$MESSAGE"
stty -echo
LOGINPASS=`head -n1`
stty $stty_orig
echo
if [ $(wc -l < "$MOUNT_PASSPHRASE_SIG_FILE") = "1" ]; then
# No filename encryption; only insert fek
if printf "%s\0" "$LOGINPASS" | ecryptfs-unwrap-passphrase "$WRAPPED_PASSPHRASE_FILE" - | ecryptfs-add-passphrase -; then
break
else
echo `gettext "ERROR:"` `gettext "Your passphrase is incorrect"`
tries=$(($tries + 1))
continue
fi
else
if printf "%s\0" "$LOGINPASS" | ecryptfs-insert-wrapped-passphrase-into-keyring "$WRAPPED_PASSPHRASE_FILE" - ; then
break
else
echo `gettext "ERROR:"` `gettext "Your passphrase is incorrect"`
tries=$(($tries + 1))
continue
fi
fi
done
if [ $tries -ge $PW_ATTEMPTS ]; then
echo `gettext "ERROR:"` `gettext "Too many incorrect password attempts, exiting"`
exit 1
fi
/sbin/mount.ecryptfs_private
else
echo `gettext "ERROR:"` `gettext "Encrypted private directory is not setup properly"`
exit 1
fi
if grep -qs "$HOME/.Private $PWD ecryptfs " /proc/mounts 2>/dev/null; then
echo
echo `gettext "INFO:"` `gettext "Your private directory has been mounted."`
echo `gettext "INFO:"` `gettext "To see this change in your current shell:"`
echo " cd $PWD"
echo
fi
exit 0