########################################################################
usage() {
-cat <<EOF
+ cat <<EOF
usage: $PGRM <subcommand> [options] [args]
MonkeySphere client tool.
subcommands:
- update-known_hosts (k) [HOST]... update known_hosts file
- update-authorized_keys (a) update authorized_keys file
- gen-subkey (g) KEYID generate an 'a' capable subkey
- -l|--length BITS key length in bits (2048)
- -e|--expire EXPIRE date to expire
- help (h,?) this help
+ update-known_hosts (k) [HOST]... update known_hosts file
+ update-authorized_keys (a) update authorized_keys file
+ gen-subkey (g) [KEYID] generate an authentication subkey
+ --length (-l) BITS key length in bits (2048)
+ --expire (-e) EXPIRE date to expire
+ subkey-to-ssh-agent (s) store authentication subkey in ssh-agent
+ help (h,?) this help
EOF
}
# generate a subkey with the 'a' usage flags set
-# FIXME: this needs some tweaking to clean it up
gen_subkey(){
+ local keyLength
+ local keyExpire
local keyID
local gpgOut
local userID
- keyID="$1"
+ # set default key parameter values
+ keyLength=
+ keyExpire=
- gpgOut=$(gpg --quiet --fixed-list-mode --list-keys --with-colons \
- "$keyID" 2> /dev/null)
+ # get options
+ TEMP=$(getopt -o l:e: -l length:,expire: -n "$PGRM" -- "$@")
- # fail if there only "tru" lines are output from gpg, which
- # indicates the key was not found.
- if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then
- failure "Key ID '$keyID' not found."
+ if [ $? != 0 ] ; then
+ exit 1
fi
- # fail if multiple pub lines are returned, which means the id given
- # is not unique
- if [ $(echo "$gpgOut" | grep '^pub:' | wc -l) -gt '1' ] ; then
+ # Note the quotes around `$TEMP': they are essential!
+ eval set -- "$TEMP"
+
+ while true ; do
+ case "$1" in
+ -l|--length)
+ keyLength="$2"
+ shift 2
+ ;;
+ -e|--expire)
+ keyExpire="$2"
+ shift 2
+ ;;
+ --)
+ shift
+ ;;
+ *)
+ break
+ ;;
+ esac
+ done
+
+ if [ -z "$1" ] ; then
+ # find all secret keys
+ keyID=$(gpg --with-colons --list-secret-keys | grep ^sec | cut -f5 -d:)
+ # if multiple sec keys exist, fail
+ if (( $(echo "$keyID" | wc -l) > 1 )) ; then
+ echo "Multiple secret keys found:"
+ echo "$keyID"
+ failure "Please specify which primary key to use."
+ fi
+ else
+ keyID="$1"
+ fi
+ if [ -z "$keyID" ] ; then
+ failure "You have no secret key available. You should create an OpenPGP
+key before joining the monkeysphere. You can do this with:
+ gpg --gen-key"
+ fi
+
+ # get key output, and fail if not found
+ gpgOut=$(gpg --quiet --fixed-list-mode --list-secret-keys --with-colons \
+ "$keyID") || failure
+
+ # fail if multiple sec lines are returned, which means the id
+ # given is not unique
+ if [ $(echo "$gpgOut" | grep '^sec:' | wc -l) -gt '1' ] ; then
failure "Key ID '$keyID' is not unique."
fi
# prompt if an authentication subkey already exists
- if echo "$gpgOut" | egrep "^(pub|sub):" | cut -d: -f 12 | grep -q a ; then
+ if echo "$gpgOut" | egrep "^(sec|ssb):" | cut -d: -f 12 | grep -q a ; then
echo "An authentication subkey already exists for key '$keyID'."
read -p "Are you sure you would like to generate another one? (y/N) " OK; OK=${OK:N}
if [ "${OK/y/Y}" != 'Y' ] ; then
fi
# set subkey defaults
- KEY_TYPE="RSA"
- KEY_LENGTH=${KEY_LENGTH:-}
- KEY_USAGE="auth"
# prompt about key expiration if not specified
- if [ -z "$KEY_EXPIRE" ] ; then
+ if [ -z "$keyExpire" ] ; then
cat <<EOF
Please specify how long the key should be valid.
0 = key does not expire
<n>m = key expires in n months
<n>y = key expires in n years
EOF
- while [ -z "$KEY_EXPIRE" ] ; do
- read -p "Key is valid for? (0) " KEY_EXPIRE
- if ! test_gpg_expire ${KEY_EXPIRE:=0} ; then
+ while [ -z "$keyExpire" ] ; do
+ read -p "Key is valid for? (0) " keyExpire
+ if ! test_gpg_expire ${keyExpire:=0} ; then
echo "invalid value"
- unset KEY_EXPIRE
+ unset keyExpire
fi
done
- elif ! test_gpg_expire "$KEY_EXPIRE" ; then
- failure "invalid key expiration value '$KEY_EXPIRE'."
+ elif ! test_gpg_expire "$keyExpire" ; then
+ failure "invalid key expiration value '$keyExpire'."
fi
# generate the list of commands that will be passed to edit-key
E
A
Q
-$KEY_LENGTH
-$KEY_EXPIRE
+$keyLength
+$keyExpire
save
EOF
)
log "generating subkey..."
- echo "$editCommands" | gpg --expert --command-fd 0 --edit-key "$keyID"
+ fifoDir=$(mktemp -d)
+ (umask 077 && mkfifo "$fifoDir/pass")
+ echo "$editCommands" | gpg --passphrase-fd 3 3< "$fifoDir/pass" --expert --command-fd 0 --edit-key "$keyID" &
+
+ passphrase_prompt "Please enter your passphrase for $keyID: " "$fifoDir/pass"
+
+ rm -rf "$fifoDir"
+ wait
log "done."
}
+function subkey_to_ssh_agent() {
+ # try to add all authentication subkeys to the agent:
+
+ local authsubkeys
+ local secretkeys
+ local subkey
+ local workingdir
+ local kname
+
+ # get list of secret keys (to work around https://bugs.g10code.com/gnupg/issue945):
+ secretkeys=$(gpg --list-secret-keys --with-colons --fixed-list-mode --fingerprint | grep '^fpr:' | cut -f10 -d: | awk '{ print "0x" $1 "!" }')
+
+ authsubkeys=$(gpg --list-secret-keys --with-colons --fixed-list-mode --fingerprint --fingerprint $secretkeys | cut -f1,5,10,12 -d: | grep -A1 '^ssb:[^:]*::[^:]*a[^:]*$' | grep '^fpr::' | cut -f3 -d: | sort -u)
+
+ workingdir=$(mktemp -d)
+ umask 077
+ mkfifo "$workingdir/passphrase"
+
+ # FIXME: we're currently allowing any other options to get passed
+ # through to ssh-add. should we limit it to known ones? For
+ # example: -d or -c and/or -t <lifetime>
+
+ # FIXME: how do we know if we succeeded or failed? ssh-add gives
+ # weird return values under setsid, and if there are more than one
+
+ for subkey in $authsubkeys; do
+ kname="MonkeySphere Key $subkey"
+
+ if [ "$1" = '-d' ]; then
+ # we're removing the subkey:
+ gpg --export "0x${subkey}!" | openpgp2ssh "$subkey" > "$workingdir/$kname"
+ (cd "$workingdir" && ssh-add -d "$kname")
+ else
+ # we're adding the subkey:
+ mkfifo "$workingdir/$kname"
+ gpg --quiet --passphrase-fd 3 3<"$workingdir/passphrase" \
+ --export-options export-reset-subkey-passwd,export-minimal,no-export-attributes \
+ --export-secret-subkeys "0x${subkey}!" | openpgp2ssh "$subkey" > "$workingdir/$kname" &
+ (cd "$workingdir" && unset -v DISPLAY && unset -v SSH_ASKPASS && /usr/bin/setsid ssh-add "$@" "$kname" </dev/null )&
+
+ passphrase_prompt "Enter passphrase for MonkeySphere Key $subkey: " "$workingdir/passphrase"
+ wait
+ fi
+ rm -f "$workingdir/$kname"
+ done
+
+ rm -rf "$workingdir"
+}
+
########################################################################
# MAIN
########################################################################
# set empty config variables with ones from the environment, or from
# config file, or with defaults
GNUPGHOME=${MONKEYSPHERE_GNUPGHOME:=${GNUPGHOME:="${HOME}/.gnupg"}}
-KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="subkeys.pgp.net"}}
+KEYSERVER=${MONKEYSPHERE_KEYSERVER:="$KEYSERVER"}
+# if keyserver not specified in env or monkeysphere.conf,
+# look in gpg.conf
+if [ -z "$KEYSERVER" ] ; then
+ if [ -f "${GNUPGHOME}/gpg.conf" ] ; then
+ KEYSERVER=$(grep -e "^[[:space:]]*keyserver " "${GNUPGHOME}/gpg.conf" | tail -1 | awk '{ print $2 }')
+ fi
+fi
+# if it's still not specified, use the default
+KEYSERVER=${KEYSERVER:="subkeys.pgp.net"}
CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
KNOWN_HOSTS=${MONKEYSPHERE_KNOWN_HOSTS:=${KNOWN_HOSTS:="${HOME}/.ssh/known_hosts"}}
HASH_KNOWN_HOSTS=${MONKEYSPHERE_HASH_KNOWN_HOSTS:=${HASH_KNOWN_HOSTS:="true"}}
[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
shift
-# unset option variables
-unset KEY_LENGTH
-unset KEY_EXPIRE
-
-# get options for key generation and add-certifier functions
-TEMP=$(getopt -o l:e: -l length:,expire: -n "$PGRM" -- "$@")
-
-if [ $? != 0 ] ; then
- usage
- exit 1
-fi
-
-# Note the quotes around `$TEMP': they are essential!
-eval set -- "$TEMP"
-
-while true ; do
- case "$1" in
- -l|--length)
- KEY_LENGTH="$2"
- shift 2
- ;;
- -e|--expire)
- KEY_EXPIRE="$2"
- shift 2
- ;;
- --)
- shift
- ;;
- *)
- break
- ;;
- esac
-done
-
case $COMMAND in
'update-known_hosts'|'update-known-hosts'|'k')
MODE='known_hosts'
+ # check permissions on the known_hosts file path
if ! check_key_file_permissions "$USER" "$KNOWN_HOSTS" ; then
- failure "Improper permissions on known_hosts file."
+ failure "Improper permissions on known_hosts file path."
fi
# if hosts are specified on the command line, process just
# otherwise, if no hosts are specified, process every host
# in the user's known_hosts file
else
- if [ ! -s "$KNOWN_HOSTS" ] ; then
- failure "known_hosts file '$KNOWN_HOSTS' is empty or does not exist."
+ # exit if the known_hosts file does not exist
+ if [ ! -e "$KNOWN_HOSTS" ] ; then
+ log "known_hosts file '$KNOWN_HOSTS' does not exist."
+ exit
fi
process_known_hosts
'update-authorized_keys'|'update-authorized-keys'|'a')
MODE='authorized_keys'
- # fail if the authorized_user_ids file is empty
- if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
- failure "authorized_user_ids file '$AUTHORIZED_USER_IDS' is empty or does not exist."
+ # check permissions on the authorized_user_ids file path
+ if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
+ failure "Improper permissions on authorized_user_ids file path."
fi
- if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
- failure "Improper permissions on authorized_user_ids file."
+ # check permissions on the authorized_keys file path
+ if ! check_key_file_permissions "$USER" "$AUTHORIZED_KEYS" ; then
+ failure "Improper permissions on authorized_keys file path."
+ fi
+
+ # exit if the authorized_user_ids file is empty
+ if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
+ log "authorized_user_ids file '$AUTHORIZED_USER_IDS' does not exist."
+ exit
fi
# process authorized_user_ids file
;;
'gen-subkey'|'g')
- keyID="$1"
- if [ -z "$keyID" ] ; then
- failure "You must specify the key ID of your primary key."
- fi
- gen_subkey "$keyID"
+ gen_subkey "$@"
+ ;;
+
+ 'subkey-to-ssh-agent'|'s')
+ subkey_to_ssh_agent "$@"
;;
- 'help'|'h'|'?')
+ '--help'|'help'|'-h'|'h'|'?')
usage
;;
projects / monkeysphere.git / blobdiff