Recover gpg key from fragments

This commit is contained in:
Bob Mottram 2015-06-30 21:45:18 +01:00
parent 94b6ecd153
commit ddc05477e7
4 changed files with 124 additions and 0 deletions

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@ -12,6 +12,7 @@ install:
mkdir -p ${DESTDIR}${PREFIX}/bin mkdir -p ${DESTDIR}${PREFIX}/bin
install -m 755 src/${APP} ${DESTDIR}${PREFIX}/bin install -m 755 src/${APP} ${DESTDIR}${PREFIX}/bin
install -m 755 src/${APP}-splitkey ${DESTDIR}${PREFIX}/bin install -m 755 src/${APP}-splitkey ${DESTDIR}${PREFIX}/bin
install -m 755 src/${APP}-recoverkey ${DESTDIR}${PREFIX}/bin
install -m 755 src/${APP}-prep ${DESTDIR}${PREFIX}/bin install -m 755 src/${APP}-prep ${DESTDIR}${PREFIX}/bin
install -m 755 src/${APP}-client ${DESTDIR}${PREFIX}/bin install -m 755 src/${APP}-client ${DESTDIR}${PREFIX}/bin
install -m 755 src/${APP}-remote ${DESTDIR}${PREFIX}/bin install -m 755 src/${APP}-remote ${DESTDIR}${PREFIX}/bin
@ -32,6 +33,7 @@ install:
mkdir -m 755 -p ${DESTDIR}${PREFIX}/share/man/man1 mkdir -m 755 -p ${DESTDIR}${PREFIX}/share/man/man1
install -m 644 man/${APP}.1.gz ${DESTDIR}${PREFIX}/share/man/man1 install -m 644 man/${APP}.1.gz ${DESTDIR}${PREFIX}/share/man/man1
install -m 644 man/${APP}-splitkey.1.gz ${DESTDIR}${PREFIX}/share/man/man1 install -m 644 man/${APP}-splitkey.1.gz ${DESTDIR}${PREFIX}/share/man/man1
install -m 644 man/${APP}-recoverkey.1.gz ${DESTDIR}${PREFIX}/share/man/man1
install -m 644 man/${APP}-prep.1.gz ${DESTDIR}${PREFIX}/share/man/man1 install -m 644 man/${APP}-prep.1.gz ${DESTDIR}${PREFIX}/share/man/man1
install -m 644 man/${APP}-client.1.gz ${DESTDIR}${PREFIX}/share/man/man1 install -m 644 man/${APP}-client.1.gz ${DESTDIR}${PREFIX}/share/man/man1
install -m 644 man/${APP}-remote.1.gz ${DESTDIR}${PREFIX}/share/man/man1 install -m 644 man/${APP}-remote.1.gz ${DESTDIR}${PREFIX}/share/man/man1
@ -52,6 +54,7 @@ install:
uninstall: uninstall:
rm -f ${PREFIX}/share/man/man1/${APP}.1.gz rm -f ${PREFIX}/share/man/man1/${APP}.1.gz
rm -f ${PREFIX}/share/man/man1/${APP}-splitkey.1.gz rm -f ${PREFIX}/share/man/man1/${APP}-splitkey.1.gz
rm -f ${PREFIX}/share/man/man1/${APP}-recoverkey.1.gz
rm -f ${PREFIX}/share/man/man1/${APP}-prep.1.gz rm -f ${PREFIX}/share/man/man1/${APP}-prep.1.gz
rm -f ${PREFIX}/share/man/man1/${APP}-client.1.gz rm -f ${PREFIX}/share/man/man1/${APP}-client.1.gz
rm -f ${PREFIX}/share/man/man1/${APP}-remote.1.gz rm -f ${PREFIX}/share/man/man1/${APP}-remote.1.gz
@ -72,6 +75,7 @@ uninstall:
rm -rf ${PREFIX}/share/${APP} rm -rf ${PREFIX}/share/${APP}
rm -f ${PREFIX}/bin/${APP} rm -f ${PREFIX}/bin/${APP}
rm -f ${PREFIX}/bin/${APP}-splitkey rm -f ${PREFIX}/bin/${APP}-splitkey
rm -f ${PREFIX}/bin/${APP}-recoverkey
rm -f ${PREFIX}/bin/${APP}-prep rm -f ${PREFIX}/bin/${APP}-prep
rm -f ${PREFIX}/bin/${APP}-client rm -f ${PREFIX}/bin/${APP}-client
rm -f ${PREFIX}/bin/${APP}-remote rm -f ${PREFIX}/bin/${APP}-remote

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@ -1,5 +1,6 @@
man/freedombone.1.gz man/freedombone.1.gz
man/freedombone-splitkey.1.gz man/freedombone-splitkey.1.gz
man/freedombone-recoverkey.1.gz
man/freedombone-prep.1.gz man/freedombone-prep.1.gz
man/freedombone-client.1.gz man/freedombone-client.1.gz
man/freedombone-remote.1.gz man/freedombone-remote.1.gz

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119
src/freedombone-recoverkey Executable file
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@ -0,0 +1,119 @@
#!/bin/bash
#
# .---. . .
# | | |
# |--- .--. .-. .-. .-.| .-. .--.--. |.-. .-. .--. .-.
# | | (.-' (.-' ( | ( )| | | | )( )| | (.-'
# ' ' --' --' -' - -' ' ' -' -' -' ' - --'
#
# Freedom in the Cloud
#
# A script which recovers a user's gpg key from a number of fragments
# License
# =======
#
# Copyright (C) 2015 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
function show_help {
echo ''
echo 'freedombone-recoverkey -u [username]'
echo ''
exit 0
}
while [[ $# > 1 ]]
do
key="$1"
case $key in
-h|--help)
show_help
;;
-u|--user)
shift
MY_USERNAME="$1"
;;
*)
# unknown option
;;
esac
shift
done
if [ ! $MY_USERNAME ]; then
show_help
fi
if [ ! -d /home/$MY_USERNAME ]; then
echo "User $MY_USERNAME does not exist on the system"
exit 7270
fi
if [ ! $MY_USERNAME ]; then
echo 'No username given'
exit 3578
fi
if [ ! -d /home/$MY_USERNAME ]; then
echo "User $MY_USERNAME does not exist on the system"
exit 7270
fi
FRAGMENTS_DIR=/home/$MY_USERNAME/.gnupg_fragments
if [ ! -d $FRAGMENTS_DIR ]; then
echo 'No fragments have been recovered, so the key cannot be recovered'
exit 7483
fi
# join the fragments
if [ ! -d /home/$MY_USERNAME/.tempgnupg ]; then
mkdir /home/$MY_USERNAME/.tempgnupg
fi
KEYS_FILE=/home/$MY_USERNAME/.tempgnupg/tempfile.asc
cat $FRAGMENTS_DIR/data* > $KEYS_FILE.gpg
if [ ! "$?" = "0" ]; then
echo 'Unable to find key fragments'
exit 8727
fi
# decrypt the file
cd /home/$MY_USERNAME/.tempgnupg
gpg -d $KEYS_FILE.gpg -o $KEYS_FILE
if [ ! "$?" = "0" ]; then
echo 'Unable to decrypt data. This may mean that not enough fragments are available'
exit 6283
fi
shred -zu $KEYS_FILE.gpg
if [ ! -f $KEYS_FILE ]; then
echo 'Unable to find decrypted key file. This may mean that not enough fragments are available'
exit 8358
fi
echo 'Key fragments decrypted'
# import the gpg key
su -c "gpg --allow-secret-key-import --import $KEYS_FILE" - $MY_USERNAME
if [ ! "$?" = "0" ]; then
echo 'Unable to import gpg key'
shred -zu $KEYS_FILE
rm -rf /home/$MY_USERNAME/.tempgnupg
exit 3682
fi
shred -zu $KEYS_FILE
chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.gnupg
chmod -R 600 /home/$MY_USERNAME/.gnupg
rm -rf /home/$MY_USERNAME/.tempgnupg
echo 'GPG key was recovered'
exit 0