case $(id -un) in
# if monkeysphere user, run the command under bash
"$MONKEYSPHERE_USER")
- bash -c "$@"
+ bash -c "$*"
;;
# if root, su command as monkeysphere user
'root')
- su "$MONKEYSPHERE_USER" -c "$@"
+ su "$MONKEYSPHERE_USER" -c "$*"
;;
# otherwise, fail
keyExpire="$1"
- if [ -z "$keyExpire" -a "$PROMPT" = 'true' ]; then
+ if [ -z "$keyExpire" -a "$PROMPT" != 'false' ]; then
cat >&2 <<EOF
Please specify how long the key should be valid.
0 = key does not expire
local fifo="$2"
local PASS
- if [ "$DISPLAY" ] && type "${SSH_ASKPASS:-ssh-askpass}" >/dev/null; then
+ if [ "$DISPLAY" ] && type "${SSH_ASKPASS:-ssh-askpass}" >/dev/null 2>/dev/null; then
printf 'Launching "%s"\n' "${SSH_ASKPASS:-ssh-askpass}" | log info
printf '(with prompt "%s")\n' "$prompt" | log debug
"${SSH_ASKPASS:-ssh-askpass}" "$prompt" > "$fifo"
check_key_file_permissions() {
local uname
local path
- local stat
- local access
- local gAccess
- local oAccess
-
- # function to check that the given permission corresponds to writability
- is_write() {
- [ "$1" = "w" ]
- }
uname="$1"
path="$2"
- log debug "checking path permission '$path'..."
-
- # rewrite path if it points to a symlink
- if [ -h "$path" ] ; then
- path=$(readlink -f "$path")
- log debug "checking path symlink '$path'..."
- fi
-
- # return 255 if cannot stat file
- if ! stat=$(ls -ld "$path" 2>/dev/null) ; then
- log error "could not stat path '$path'."
- return 255
- fi
-
- owner=$(echo "$stat" | awk '{ print $3 }')
- gAccess=$(echo "$stat" | cut -c6)
- oAccess=$(echo "$stat" | cut -c9)
-
- # return 1 if path has invalid owner
- if [ "$owner" != "$uname" -a "$owner" != 'root' ] ; then
- log error "improper ownership on path '$path':"
- log error " $owner != ($uname|root)"
- return 1
- fi
-
- # return 2 if path has group or other writability
- if is_write "$gAccess" || is_write "$oAccess" ; then
- log error "improper group or other writability on path '$path':"
- log error " group: $gAccess, other: $oAccess"
- return 2
- fi
-
- # return zero if all clear, or go to next path
- if [ "$path" = '/' ] ; then
- log debug "path ok."
+ if [ "$STRICT_MODES" = 'false' ] ; then
+ log debug "skipping path permission check for '$path' because STRICT_MODES is false..."
return 0
- else
- check_key_file_permissions "$uname" $(dirname "$path")
fi
+ log debug "checking path permission '$path'..."
+ "${SYSSHAREDIR}/checkperms" "$uname" "$path"
}
# return a list of all users on the system
fi
}
+# take one argument, a service name. in response, print a series of
+# lines, each with a unique numeric port number that might be
+# associated with that service name. (e.g. in: "https", out: "443")
+# if nothing is found, print nothing, and return 0.
+#
+# return 1 if there was an error in the search somehow
+get_port_for_service() {
+
+ [[ "$1" =~ ^[a-z0-9]([a-z0-9-]*[a-z0-9])?$ ]] || \
+ failure $(printf "This is not a valid service name: '%s'" "$1")
+ if type getent &>/dev/null ; then
+ # for linux and FreeBSD systems (getent returns 2 if not found, 0 on success, 1 or 3 on various failures)
+ (getent services "$service" || if [ "$?" -eq 2 ] ; then true ; else false; fi) | awk '{ print $2 }' | cut -f1 -d/ | sort -u
+ elif [ -r /etc/services ] ; then
+ # fall back to /etc/services for systems that don't have getent (MacOS?)
+ # FIXME: doesn't handle aliases like "null" (or "http"?), which don't show up at the beginning of the line.
+ awk $(printf '/^%s[[:space:]]/{ print $2 }' "$1") /etc/services | cut -f1 -d/ | sort -u
+ else
+ return 1
+ fi
+}
+
# return the path to the home directory of a user
get_homedir() {
local uname=${1:-`whoami`}
eval "echo ~${uname}"
}
+# return the primary group of a user
+get_primary_group() {
+ local uname=${1:-`whoami`}
+ groups "$uname" | sed 's/^..* : //' | awk '{ print $1 }'
+}
+
### CONVERSION UTILITIES
# output the ssh key for a given key ID
keyID="$1"
- gpg --export "$keyID" | openpgp2ssh "$keyID" 2>/dev/null
+ gpg --export --no-armor "$keyID" | openpgp2ssh "$keyID" 2>/dev/null
}
# output known_hosts line from ssh key
# output authorized_keys line from ssh key
ssh2authorized_keys() {
- local userID
- local key
-
- userID="$1"
- key="$2"
+ local koptions="$1"
+ local userID="$2"
+ local key="$3"
- printf "%s MonkeySphere%s %s\n" "$key" "$DATE" "$userID"
+ if [[ -z "$koptions" ]]; then
+ printf "%s MonkeySphere%s %s\n" "$key" "$DATE" "$userID"
+ else
+ printf "%s %s MonkeySphere%s %s\n" "$koptions" "$key" "$DATE" "$userID"
+ fi
}
# convert key from gpg to ssh known_hosts format
### GPG UTILITIES
+# script to determine if gpg version is equal to or greater than specified version
+is_gpg_version_greater_equal() {
+ local gpgVersion=$(gpg --version | head -1 | awk '{ print $3 }')
+ local latest=$(printf '%s\n%s\n' "$1" "$gpgVersion" \
+ | tr '.' ' ' | sort -g -k1 -k2 -k3 \
+ | tail -1 | tr ' ' '.')
+ [[ "$gpgVersion" == "$latest" ]]
+}
+
# retrieve all keys with given user id from keyserver
# FIXME: need to figure out how to retrieve all matching keys
# (not just first N (5 in this case))
--search ="$userID" &>/dev/null
returnCode="$?"
+ if [ "$returnCode" != 0 ] ; then
+ log error "Failure ($returnCode) searching keyserver $KEYSERVER for user id '$userID'"
+ fi
+
return "$returnCode"
}
# userid and key policy checking
# the following checks policy on the returned keys
# - checks that full key has appropriate valididy (u|f)
-# - checks key has specified capability (REQUIRED_*_KEY_CAPABILITY)
+# - checks key has specified capability (REQUIRED_KEY_CAPABILITY)
# - checks that requested user ID has appropriate validity
# (see /usr/share/doc/gnupg/DETAILS.gz)
# output is one line for every found key, in the following format:
# flag:sshKey
#
# "flag" is an acceptability flag, 0 = ok, 1 = bad
-# "sshKey" is the translated gpg key
+# "sshKey" is the relevant OpenPGP key, in the form accepted by OpenSSH
#
# all log output must go to stderr, as stdout is used to pass the
# flag:sshKey to the calling function.
-#
-# expects global variable: "MODE"
process_user_id() {
local returnCode=0
- local userID
+ local userID="$1"
local requiredCapability
local requiredPubCapability
local gpgOut
local lastKeyOK
local fingerprint
- userID="$1"
-
# set the required key capability based on the mode
- if [ "$MODE" = 'known_hosts' ] ; then
- requiredCapability="$REQUIRED_HOST_KEY_CAPABILITY"
- elif [ "$MODE" = 'authorized_keys' ] ; then
- requiredCapability="$REQUIRED_USER_KEY_CAPABILITY"
- fi
+ requiredCapability=${REQUIRED_KEY_CAPABILITY:="a"}
requiredPubCapability=$(echo "$requiredCapability" | tr "[:lower:]" "[:upper:]")
# fetch the user ID if necessary/requested
if [ "$keyOK" -a "$uidOK" -a "$lastKeyOK" ] ; then
log verbose " * acceptable primary key."
if [ -z "$sshKey" ] ; then
- log error " ! primary key could not be translated (not RSA?)."
+ log verbose " ! primary key could not be translated (not RSA?)."
else
echo "0:${sshKey}"
fi
# being processed in the key files over "bad" keys (key flag '1')
}
+# output all valid keys for specified user ID literal
+keys_for_userid() {
+ local userID
+ local noKey=
+ local nKeys
+ local nKeysOK
+ local ok
+ local sshKey
+ local tmpfile
+
+ userID="$1"
+
+ log verbose "processing: $userID"
+
+ nKeys=0
+ nKeysOK=0
+
+ IFS=$'\n'
+ for line in $(process_user_id "${userID}") ; do
+ # note that key was found
+ nKeys=$((nKeys+1))
+
+ ok=$(echo "$line" | cut -d: -f1)
+ sshKey=$(echo "$line" | cut -d: -f2)
+
+ if [ -z "$sshKey" ] ; then
+ continue
+ fi
+
+ # if key OK, output key to stdout
+ if [ "$ok" -eq '0' ] ; then
+ # note that key was found ok
+ nKeysOK=$((nKeysOK+1))
+
+ printf '%s\n' "$sshKey"
+ fi
+ done
+
+ # if at least one key was found...
+ if [ "$nKeys" -gt 0 ] ; then
+ # if ok keys were found, return 0
+ if [ "$nKeysOK" -gt 0 ] ; then
+ return 0
+ # else return 2
+ else
+ return 2
+ fi
+ # if no keys were found, return 1
+ else
+ return 1
+ fi
+}
+
# process a single host in the known_host file
process_host_known_hosts() {
local host
local tmpfile
# set the key processing mode
- export MODE='known_hosts'
+ export REQUIRED_KEY_CAPABILITY="$REQUIRED_HOST_KEY_CAPABILITY"
host="$1"
userID="ssh://${host}"
# hash if specified
if [ "$HASH_KNOWN_HOSTS" = 'true' ] ; then
+ if (type ssh-keygen >/dev/null) ; then
# FIXME: this is really hackish cause ssh-keygen won't
# hash from stdin to stdout
- tmpfile=$(mktemp ${TMPDIR:-/tmp}/tmp.XXXXXXXXXX)
- ssh2known_hosts "$host" "$sshKey" > "$tmpfile"
- ssh-keygen -H -f "$tmpfile" 2>/dev/null
- cat "$tmpfile" >> "$KNOWN_HOSTS"
- rm -f "$tmpfile" "${tmpfile}.old"
+ tmpfile=$(mktemp ${TMPDIR:-/tmp}/tmp.XXXXXXXXXX)
+ ssh2known_hosts "$host" "$sshKey" > "$tmpfile"
+ ssh-keygen -H -f "$tmpfile" 2>/dev/null
+ cat "$tmpfile" >> "$KNOWN_HOSTS"
+ rm -f "$tmpfile" "${tmpfile}.old"
+ else
+ # FIXME: we could do this without needing ssh-keygen. hashed
+ # known_hosts looks like: |1|X|Y where 1 means SHA1 (nothing
+ # else is defined in openssh sources), X is the salt (same
+ # length as the digest output), base64-encoded, and Y is the
+ # digested hostname (also base64-encoded).
+
+ # see hostfile.{c,h} in openssh sources.
+
+ failure "Cannot hash known_hosts as requested"
+ fi
else
ssh2known_hosts "$host" "$sshKey" >> "$KNOWN_HOSTS"
fi
local nHostsBAD
local fileCheck
local host
+ local newUmask
# the number of hosts specified on command line
nHosts="$#"
# touch the known_hosts file so that the file permission check
# below won't fail upon not finding the file
- (umask 0022 && touch "$KNOWN_HOSTS")
+ if [ ! -f "$KNOWN_HOSTS" ]; then
+ # make sure to create any files or directories with the appropriate write bits turned off:
+ newUmask=$(printf "%04o" $(( 0$(umask) | 0022 )) )
+ [ -d $(dirname "$KNOWN_HOSTS") ] \
+ || (umask "$newUmask" && mkdir -p -m 0700 $(dirname "$KNOWN_HOSTS") ) \
+ || failure "Could not create path to known_hosts file '$KNOWN_HOSTS'"
+ # make sure to create this file with the appropriate bits turned off:
+ (umask "$newUmask" && touch "$KNOWN_HOSTS") \
+ || failure "Unable to create known_hosts file '$KNOWN_HOSTS'"
+ fi
# check permissions on the known_hosts file path
- check_key_file_permissions $(whoami) "$KNOWN_HOSTS" || failure
+ check_key_file_permissions $(whoami) "$KNOWN_HOSTS" \
+ || failure "Bad permissions governing known_hosts file '$KNOWN_HOSTS'"
# create a lockfile on known_hosts:
lock create "$KNOWN_HOSTS"
trap "lock remove $KNOWN_HOSTS" EXIT
# note pre update file checksum
- fileCheck="$(file_hash "$KNOWN_HOSTS")"
+ fileCheck=$(file_hash "$KNOWN_HOSTS")
for host ; do
# process the host
# process uids for the authorized_keys file
process_uid_authorized_keys() {
local userID
+ local koptions
local nKeys
local nKeysOK
local ok
local sshKey
# set the key processing mode
- export MODE='authorized_keys'
+ export REQUIRED_KEY_CAPABILITY="$REQUIRED_USER_KEY_CAPABILITY"
- userID="$1"
+ koptions="$1"
+ userID="$2"
log verbose "processing: $userID"
# note that key was found ok
nKeysOK=$((nKeysOK+1))
- ssh2authorized_keys "$userID" "$sshKey" >> "$AUTHORIZED_KEYS"
+ ssh2authorized_keys "$koptions" "$userID" "$sshKey" >> "$AUTHORIZED_KEYS"
fi
done
local nIDsOK
local nIDsBAD
local fileCheck
+ local x koptions
+ declare -i argtype
+
+ if (( $# % 2 )); then log error "Bad number of arguments; this should never happen."; return 1; fi
# the number of ids specified on command line
- nIDs="$#"
+ (( nIDs=$#/2 ))
+ (( argtype=0 ))
nIDsOK=0
nIDsBAD=0
# remove any monkeysphere lines from authorized_keys file
remove_monkeysphere_lines "$AUTHORIZED_KEYS"
- for userID ; do
- # process the user ID, change return code if key not found for
- # user ID
- process_uid_authorized_keys "$userID" || returnCode="$?"
-
- # note the result
- case "$returnCode" in
- 0)
- nIDsOK=$((nIDsOK+1))
- ;;
- 2)
- nIDsBAD=$((nIDsBAD+1))
- ;;
- esac
-
- # touch the lockfile, for good measure.
- lock touch "$AUTHORIZED_KEYS"
+ for x; do
+ (( argtype++ ))
+ if (( $argtype % 2 )); then
+ koptions="$x"
+ else
+ userID="$x"
+
+ # process the user ID, change return code if key not found
+ # for user ID
+ process_uid_authorized_keys "$koptions" "$userID" || returnCode="$?"
+
+ # note the result
+ case "$returnCode" in
+ 0)
+ nIDsOK=$((nIDsOK+1))
+ ;;
+ 2)
+ nIDsBAD=$((nIDsBAD+1))
+ ;;
+ esac
+
+ # touch the lockfile, for good measure.
+ lock touch "$AUTHORIZED_KEYS"
+ fi
done
# remove the lockfile and the trap
# process an authorized_user_ids file for authorized_keys
process_authorized_user_ids() {
local line
- local nline
- local userIDs
+ declare -i nline
+ declare -a userIDs
+ declare -a koptions
+ declare -a export_array
authorizedUserIDs="$1"
+ (( nline=0 ))
+
# exit if the authorized_user_ids file is empty
if [ ! -e "$authorizedUserIDs" ] ; then
failure "authorized_user_ids file '$authorizedUserIDs' does not exist."
# extract user IDs from authorized_user_ids file
IFS=$'\n'
for line in $(meat "$authorizedUserIDs") ; do
- userIDs["$nline"]="$line"
- nline=$((nline+1))
+ case "$line" in
+ (" "*|$'\t'*)
+ if [[ -z ${koptions[${nline}]} ]]; then
+ koptions[${nline}]=$(echo $line | sed 's/^[ ]*//;s/[ ]$//;')
+ else
+ koptions[${nline}]="${koptions[${nline}]},$(echo $line | sed 's/^[ ]*//;s/[ ]$//;')"
+ fi
+ ;;
+ (*)
+ ((nline++))
+ userIDs[${nline}]="$line"
+ unset koptions[${nline}] || true
+ ;;
+ esac
+ done
+
+ for i in $(seq 1 $nline); do
+ export_array+=("${koptions[$i]}" "${userIDs[$i]}")
done
- update_authorized_keys "${userIDs[@]}"
+ update_authorized_keys "${export_array[@]}"
}
# takes a gpg key or keys on stdin, and outputs a list of
# fingerprints, one per line:
list_primary_fingerprints() {
local fake=$(msmktempdir)
- GNUPGHOME="$fake" gpg --no-tty --quiet --import
+ trap "rm -rf $fake" EXIT
+ GNUPGHOME="$fake" gpg --no-tty --quiet --import --ignore-time-conflict 2>/dev/null
GNUPGHOME="$fake" gpg --with-colons --fingerprint --list-keys | \
awk -F: '/^fpr:/{ print $10 }'
+ trap - EXIT
+ rm -rf "$fake"
+}
+
+# takes an OpenPGP key or set of keys on stdin, a fingerprint or other
+# key identifier as $1, and outputs the gpg-formatted information for
+# the requested keys from the material on stdin
+get_cert_info() {
+ local fake=$(msmktempdir)
+ trap "rm -rf $fake" EXIT
+ GNUPGHOME="$fake" gpg --no-tty --quiet --import --ignore-time-conflict 2>/dev/null
+ GNUPGHOME="$fake" gpg --with-colons --fingerprint --fixed-list-mode --list-keys "$1"
+ trap - EXIT
rm -rf "$fake"
}
projects / monkeysphere.git / blobdiff