# FIXME: need to figure out how to retrieve all matching keys
# (not just first 5)
gpg_fetch_userid() {
- local id
- id="$1"
- echo 1,2,3,4,5 | \
- gpg --quiet --batch --command-fd 0 --with-colons \
- --keyserver "$KEYSERVER" \
- --search ="$id" >/dev/null 2>&1
+ local userID
+ userID="$1"
+
+ # if CHECK_KEYSERVER variable set, check the keyserver
+ # for the user ID
+ if [ "CHECK_KEYSERVER" ] ; then
+ echo 1,2,3,4,5 | \
+ gpg --quiet --batch --command-fd 0 --with-colons \
+ --keyserver "$KEYSERVER" \
+ --search ="$userID" >/dev/null 2>&1
+
+ # otherwise just return true
+ else
+ return
+ fi
}
# check that characters are in a string (in an AND fashion).
gpg --export "$keyID" | \
openpgp2ssh "$keyID" | tr -d '\n'
- echo " MonkeySphere${DATE}:${userID}"
+ echo " MonkeySphere${DATE}: ${userID}"
}
# userid and key policy checking
local requiredCapability
local requiredPubCapability
local gpgOut
+ local userIDHash
+ local keyCacheDir
local line
local type
local validity
local keyid
local uidfpr
- local capability
+ local usage
local keyOK
local pubKeyID
local uidOK
local keyIDs
- local userIDHash
local keyID
userID="$1"
gpg_fetch_userid "$userID" || return 1
# output gpg info for (exact) userid and store
- gpgOut=$(gpg --fixed-list-mode --list-key --with-colons \
- ="$userID" 2> /dev/null)
-
- # return 1 if there only "tru" lines are output from gpg
- if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then
- log " key not found."
- return 1
+ gpgOut=$(gpg --list-key --fixed-list-mode --with-colon \
+ --with-fingerprint --with-fingerprint \
+ ="$userID" 2>/dev/null)
+
+ # if the gpg query return code is not 0, return 1
+ if [ "$?" -ne 0 ] ; then
+ log " key not found."
+ return 1
fi
+ echo "$gpgOut"
+
# loop over all lines in the gpg output and process.
# need to do it this way (as opposed to "while read...") so that
# variables set in loop will be visible outside of loop
- for line in $(seq 1 $(echo "$gpgOut" | wc -l)) ; do
-
- # read the contents of the line
- type=$(echo "$gpgOut" | cutline "$line" | cut -d: -f1)
- validity=$(echo "$gpgOut" | cutline "$line" | cut -d: -f2)
- keyid=$(echo "$gpgOut" | cutline "$line" | cut -d: -f5)
- uidfpr=$(echo "$gpgOut" | cutline "$line" | cut -d: -f10)
- capability=$(echo "$gpgOut" | cutline "$line" | cut -d: -f12)
-
+ echo "$gpgOut" | cut -d: -f1,2,5,10,12 | \
+ while IFS=: read -r type validity keyid uidfpr usage ; do
# process based on record type
case $type in
'pub') # primary keys
# new key, wipe the slate
keyOK=
- pubKeyID=
uidOK=
- keyIDs=
-
- pubKeyID="$keyid"
+ pubKeyOK=
+ fingerprint=
- # check primary key validity
+ # if overall key is not valid, skip
if [ "$validity" != 'u' -a "$validity" != 'f' ] ; then
log " unacceptable primary key validity ($validity)."
continue
fi
- # check capability is not Disabled...
- if check_capability "$capability" 'D' ; then
+ # if overall key is disabled, skip
+ if check_capability "$usage" 'D' ; then
log " key disabled."
continue
fi
- # check overall key capability
- # must be Encryption and Authentication
- if ! check_capability "$capability" $requiredPubCapability ; then
- log " unacceptable primary key capability ($capability)."
+ # if overall key capability is not ok, skip
+ if ! check_capability "$usage" $requiredPubCapability ; then
+ log " unacceptable primary key capability ($usage)."
continue
fi
- # mark if primary key is acceptable
+ # mark overall key as ok
keyOK=true
- # add primary key ID to key list if it has required capability
- if check_capability "$capability" $requiredCapability ; then
- keyIDs[${#keyIDs[*]}]="$keyid"
+ # mark primary key as ok if capability is ok
+ if check_capability "$usage" $requiredCapability ; then
+ pubKeyOK=true
fi
;;
'uid') # user ids
- # check key ok and we have key fingerprint
+ # if the overall key is not ok, skip
if [ -z "$keyOK" ] ; then
continue
fi
- # check key validity
- if [ "$validity" != 'u' -a "$validity" != 'f' ] ; then
+ # if an acceptable user ID was already found, skip
+ if [ "$uidOK" ] ; then
continue
fi
- # check the uid matches
+ # if the user ID does not match, skip
if [ "$(unescape "$uidfpr")" != "$userID" ] ; then
continue
fi
+ # if the user ID validity is not ok, skip
+ if [ "$validity" != 'u' -a "$validity" != 'f' ] ; then
+ continue
+ fi
- # mark if uid acceptable
+ # mark user ID acceptable
uidOK=true
+
+ # output a line for the primary key
+ # 0 = ok, 1 = bad
+ if [ "$keyOK" -a "$uidOK" -a "$pubKeyOK" ] ; then
+ log " acceptable key found"
+ echo 0 "$fingerprint"
+ else
+ echo 1 "$fingerprint"
+ fi
;;
'sub') # sub keys
- # add sub key ID to key list if it has required capability
- if check_capability "$capability" $requiredCapability ; then
- keyIDs[${#keyIDs[*]}]="$keyid"
+ # unset acceptability of last key
+ subKeyOK=
+ fingerprint=
+
+ # if the overall key is not ok, skip
+ if [ -z "$keyOK" ] ; then
+ continue
+ fi
+ # if sub key validity is not ok, skip
+ if [ "$validity" != 'u' -a "$validity" != 'f' ] ; then
+ continue
+ fi
+ # if sub key capability is not ok, skip
+ if ! check_capability "$usage" $requiredCapability ; then
+ continue
+ fi
+
+ # mark sub key as ok
+ subKeyOK=true
+ ;;
+ 'fpr') # key fingerprint
+ fingerprint="$uidfpr"
+
+ # output a line for the last subkey
+ # 0 = ok, 1 = bad
+ if [ "$keyOK" -a "$uidOK" -a "$subKeyOK" ] ; then
+ log " acceptable key found"
+ echo 0 "$fingerprint"
+ else
+ echo 1 "$fingerprint"
fi
;;
esac
done
-
- # hash userid for cache file name
- userIDHash=$(echo "$userID" | sha1sum | awk '{ print $1 }')
-
- # make sure the cache directory exists
- mkdir -p "$cacheDir"
-
- # touch/clear key cache file
- # (will be left empty if there are noacceptable keys)
- > "$cacheDir"/"$userIDHash"."$pubKeyID"
-
- # for each acceptable key, write an ssh key line to the
- # key cache file
- if [ "$keyOK" -a "$uidOK" -a "${keyIDs[*]}" ] ; then
- for keyID in ${keyIDs[@]} ; do
- log " acceptable key/uid found."
-
- if [ "$MODE" = 'known_hosts' ] ; then
- # export the key
- gpg2known_hosts "$keyID" "$userID" >> \
- "$cacheDir"/"$userIDHash"."$pubKeyID"
- # hash the cache file if specified
- if [ "$HASH_KNOWN_HOSTS" ] ; then
- ssh-keygen -H -f "$cacheDir"/"$userIDHash"."$pubKeyID" > /dev/null 2>&1
- rm "$cacheDir"/"$userIDHash"."$pubKeyID".old
- fi
- elif [ "$MODE" = 'authorized_keys' ] ; then
- # export the key
- # FIXME: needs to apply extra options for authorized_keys
- # lines if specified
- gpg2authorized_keys "$keyID" "$userID" >> \
- "$cacheDir"/"$userIDHash"."$pubKeyID"
- fi
- done
- fi
-
- # echo the path to the key cache file
- echo "$cacheDir"/"$userIDHash"."$pubKeyID"
}
# update the cache for userid, and prompt to add file to
log "processing userid: '$userID'"
+ # return 1 if there is no output of the user ID processing
+ # ie. no key was found
keyCachePath=$(process_user_id "$userID" "$cacheDir")
-
if [ -z "$keyCachePath" ] ; then
return 1
fi
+
+ # check if user ID is in the authorized_user_ids file
if ! grep -q "^${userID}\$" "$AUTHORIZED_USER_IDS" ; then
read -p "user ID not currently authorized. authorize? [Y|n]: " OK; OK=${OK:=Y}
if [ ${OK/y/Y} = 'Y' ] ; then
+ # add if specified
log -n "adding user ID to authorized_user_ids file... "
echo "$userID" >> "$AUTHORIZED_USER_IDS"
echo "done."
else
+ # else do nothing
log "authorized_user_ids file untouched."
fi
fi
log "processing userid: '$userID'"
+ # check if user ID is in the authorized_user_ids file
if ! grep -q "^${userID}\$" "$AUTHORIZED_USER_IDS" ; then
log "user ID not currently authorized."
return 1
fi
+ # remove user ID from file
log -n "removing user ID '$userID'... "
grep -v "$userID" "$AUTHORIZED_USER_IDS" | sponge "$AUTHORIZED_USER_IDS"
echo "done."
}
+# remove all keys from specified key cache from known_hosts file
+remove_known_hosts_host_keys() {
+ local keyCachePath
+ local hosts
+ local type
+ local key
+ local comment
+
+ keyCachePath="$1"
+
+ meat "${keyCachePath}/keys" | \
+ while read -r hosts type key comment ; do
+ grep -v "$key" "$USER_KNOWN_HOSTS" | sponge "$USER_KNOWN_HOSTS"
+ done
+}
+
# process a host for addition to a known_host file
process_host() {
local host
host="$1"
cacheDir="$2"
- log "processing host: '$host'"
-
- keyCachePath=$(process_user_id "ssh://${host}" "$cacheDir")
- if [ $? = 0 ] ; then
- ssh-keygen -R "$host" -f "$USER_KNOWN_HOSTS"
- cat "$keyCachePath" >> "$USER_KNOWN_HOSTS"
- fi
+ log "processing host: $host"
+
+ userID="ssh://${host}"
+ process_user_id "ssh://${host}"
+ exit
+ process_user_id "ssh://${host}" | \
+ while read -r ok key ; do
+ # remove the old host key line
+ remove_known_hosts_host_keys "$key"
+ # if key OK, add new host line
+ if [ "$ok" -eq '0' ] ; then
+ known_hosts_line "$host" "$key" >> "$USER_KNOWN_HOSTS"
+ fi
+ done
}
# process known_hosts file
# go through line-by-line, extract each host, and process with the
# host processing function
process_known_hosts() {
- local knownHosts
local cacheDir
local hosts
local host
- knownHosts="$1"
- cacheDir="$2"
+ cacheDir="$1"
# take all the hosts from the known_hosts file (first field),
# grep out all the hashed hosts (lines starting with '|')...
- cut -d ' ' -f 1 "$knownHosts" | \
- grep -v '^|.*$' | \
+ meat "$USER_KNOWN_HOSTS" | cut -d ' ' -f 1 | grep -v '^|.*$' | \
while IFS=, read -r -a hosts ; do
# ...and process each host
for host in ${hosts[*]} ; do
authorizedIDs="$1"
cacheDir="$2"
- # clean out keys file and remake keys directory
- rm -rf "$cacheDir"
- mkdir -p "$cacheDir"
-
- # loop through all user ids in file
- # FIXME: needs to handle authorized_keys options
- cat "$authorizedIDs" | meat | \
- while read -r userID ; do
- # process the userid
- log "processing userid: '$userID'"
- process_user_id "$userID" "$cacheDir" > /dev/null
+ process_user_id "$userID" | \
+ while read -r ok key ; do
+ # remove the old host key line
+ remove_authorized_keys_user_keys "$key"
+ # if key OK, add new host line
+ if [ "$ok" -eq '0' ] ; then
+ authorized_keys_line "$userID" "$key" >> "$USER_AUTHORIZED_KEYS"
+ fi
done
}
projects / monkeysphere.git / commitdiff