This file is indexed.

/usr/sbin/monkeysphere-host is in monkeysphere 0.37-2.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
#!/usr/bin/env bash

# monkeysphere-host: Monkeysphere host admin tool
#
# The monkeysphere scripts are written by:
# Jameson Rollins <jrollins@finestructure.net>
# Jamie McClelland <jm@mayfirst.org>
# Daniel Kahn Gillmor <dkg@fifthhorseman.net>
# Micah Anderson <micah@riseup.net>
#
# They are Copyright 2008-2010, and are all released under the GPL,
# version 3 or later.

########################################################################
set -e

# set the pipefail option so pipelines fail on first command failure
set -o pipefail

PGRM=$(basename $0)

SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}
export SYSSHAREDIR
. "${SYSSHAREDIR}/defaultenv"
. "${SYSSHAREDIR}/common"

# sharedir for host functions
MHSHAREDIR="${SYSSHAREDIR}/mh"

# datadir for host functions
MHDATADIR="${SYSDATADIR}/host"

# host pub key files
HOST_KEY_FILE="${SYSDATADIR}/host_keys.pub.pgp"

# UTC date in ISO 8601 format if needed
DATE=$(date -u '+%FT%T')

# unset some environment variables that could screw things up
unset GREP_OPTIONS

########################################################################
# FUNCTIONS
########################################################################

usage() {
    cat <<EOF >&2
usage: $PGRM <subcommand> [options] [args]
Monkeysphere host admin tool.

subcommands:
 import-key (i) FILE SERVICENAME       import PEM-encoded key from file
 show-keys (s) [KEYID ...]             output host key information
 publish-keys (p) [KEYID ...]          publish key(s) to keyserver
 set-expire (e) EXPIRE [KEYID]         set key expiration
 add-servicename (n+) SERVICENAME [KEYID]
                                       add a service name to key
 revoke-servicename (n-) SERVICENAME [KEYID]
                                       revoke a service name from key
 add-revoker (r+) REVOKER_KEYID|FILE [KEYID]
                                       add a revoker to key
 revoke-key [KEYID]                    generate and/or publish revocation
                                       certificate for key

 version (v)                           show version number
 help (h,?)                            this help

See ${PGRM}(8) for more info.
EOF
}

# function to interact with the gpg keyring
gpg_host() {
    GNUPGHOME="$GNUPGHOME_HOST" LC_ALL=C gpg --no-auto-check-trustdb --trust-model=always --no-greeting --quiet --no-tty --fixed-list-mode "$@"
}

# list the info about the a key, in colon format, to stdout
gpg_host_list_keys() {
    if [ "$1" ] ; then
	gpg_host --list-keys --with-colons \
	    --with-fingerprint --with-fingerprint \
	    "$1"
    else
	gpg_host --list-keys --with-colons \
	    --with-fingerprint --with-fingerprint
    fi
}

# edit key scripts, takes scripts on stdin, and keyID as first input
gpg_host_edit() {
    gpg_host --command-fd 0 --edit-key "$@"
}

# export the monkeysphere OpenPGP pub key file
update_pgp_pub_file() {
    log debug "updating openpgp public key file '$HOST_KEY_FILE'..."
    gpg_host --export --armor --export-options export-minimal \
        $(gpg_host --list-secret-keys --with-colons --fingerprint | grep ^fpr | cut -f10 -d:) \
        > "$HOST_KEY_FILE"
}

# check that the service name is well formed. we assume that the
# service name refers to a host; DNS labels for host names are limited
# to a very small range of characters (see RFC 1912, section 2.1).

# FIXME: i'm failing to check here for label components that are
# all-number (e.g. ssh://666.666), which are technically not allowed
# (though some exist on the 'net, apparently)

# FIXME: this will probably misbehave if raw IP addresses are provided,
# either IPv4 or IPv6 using the bracket notation.

# FIXME: this doesn't address the use of hashed User IDs.

check_service_name() {
    local name="$1"
    local errs=""
    local scheme
    local port
    local assigned_ports

    [ -n "$name" ] || \
        failure "You must supply a service name to check"

    printf '%s' "$name" | perl -n -e '($str = $_) =~ s/\s//g ; exit !(lc($str) eq $_);' || \
        failure "Not a valid service name: '$name'

Service names should be canonicalized to all lower-case,
with no whitespace"

    [[ "$name" =~ ^[a-z0-9./:-]+$ ]] || \
        failure "Not a valid service name: '$name'

Service names should contain only lower-case ASCII letters
numbers, dots (.), hyphens (-), slashes (/), and a colon (:).
If you are using non-ASCII characters (e.g. IDN), you should
use the canonicalized ASCII (NAMEPREP -> Punycode) representation
(see RFC 3490)."

    [[ "$name" =~ \. ]] || \
        failure "Not a valid service name: '$name'

Service names should use fully-qualified domain names (FQDN), but the
domain name you chose appears to only have the local part.  For
example: don't use 'ssh://foo' ; use 'ssh://foo.example.com' instead."

    [[ "$name" =~ ^[a-z0-9]([a-z0-9-]*[a-z0-9])?://[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.|((\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)+))(:[1-9][0-9]{0,4})?$ ]] || \
        failure "Not a valid service name: '$name'

Service names look like <scheme>://full.example.com[:<portnumber>],
where <scheme> is something like ssh or https, and <portnumber> is
a decimal number (supplied only if the service is on a non-standard
port)."
    
    scheme=$(cut -f1 -d: <<<"$name")
    port=$(cut -f3 -d: <<<"$name")
    
    # check that the scheme name is found in the system services
    # database
    available_=$(get_port_for_service "$scheme") || \
        log error "Error looking up service scheme named '%s'" "$scheme"

    # FIXME: if the service isn't found, or does not have a port, what
    # should we do? at the moment, we're just warning.
    
    if [ -n "$port" ]; then
    # check that the port number is a legitimate port number (> 0, < 65536)
        [ "$port" -gt 0 ] && [ "$port" -lt 65536 ] || \
            failure "The given port number should be greater than 0 and
less than 65536.  '$port' is not OK"

    # if the port number is given, and the scheme is in the services
    # database, check that the port number does *not* match the
    # default port.
        if (printf '%s' "$assigned_ports" | grep -q -F -x "$port" ) ; then
            failure $(printf "The scheme %s uses port number %d by default.
You should leave off the port number if it is the default" "$scheme" "$port")
        fi
    fi

}

# fail if host key not present
check_no_keys() {
    [ -s "$HOST_KEY_FILE" ] \
	|| failure "You don't appear to have a Monkeysphere host key on this server.
Please run 'monkeysphere-host import-key' import a key."
}

# key input to functions, outputs full fingerprint of specified key if
# found
check_key_input() {
    local keyID="$1"
    # array of fingerprints
    local fprs=($(list_primary_fingerprints <"$HOST_KEY_FILE"))

    case ${#fprs[@]} in
	0)
	    failure "You don't appear to have any Monkeysphere host keys.
Please run 'monkeysphere-host import-key' to import a key."
	    ;;
	1)
	    :
	    ;;
	*)
	    if [ -z "$keyID" ] ; then
		failure "Your host keyring contains multiple keys.
Please specify one to act on (see 'monkeysphere-host show-keys')."
	    fi
	    ;;
    esac
    printf '%s\n' "${fprs[@]}" | grep "${keyID}$" \
	|| failure "Host key '$keyID' not found."
}

# return 0 if user ID was found.
# return 1 if user ID not found.
check_key_userid() {
    local keyID="$1"
    local userID="$2"
    local tmpuidMatch

    # match to only "unknown" user IDs (host has no need for ultimate trust)
    tmpuidMatch="uid:-:$(echo $userID | gpg_escape)"

    # See whether the requsted user ID is present
    gpg_host_list_keys "$keyID" | cut -f1,2,10 -d: | \
	grep -q -x -F "$tmpuidMatch" 2>/dev/null
}

prompt_userid_exists() {
    local userID="$1"
    local gpgOut
    local fingerprint

    if gpgOut=$(gpg_host_list_keys "=${userID}" 2>/dev/null) ; then
	fingerprint=$(echo "$gpgOut" | grep '^fpr:' | cut -d: -f10)
	if [ "$PROMPT" != "false" ] ; then
	    printf "Service name '%s' is already being used by key '%s'.\nAre you sure you want to use it again? (y/N) " "$userID" "$fingerprint" >&2
	    read OK; OK=${OK:=N}
	    if [ "${OK/y/Y}" != 'Y' ] ; then
		failure "Service name not added."
	    fi
	else
	    log info "Key '%s' is already using the service name '%s'." "$fingerprint" "$userID" >&2
	fi
    fi
}

# run command looped over keys
multi_key() {
    local cmd="$1"
    shift
    local keys=$@
    local i=0
    local key

    check_no_keys

    log debug "listing primary fingerprints from $HOST_KEY_FILE"
    local fprs=($(list_primary_fingerprints <"$HOST_KEY_FILE"))
    log debug "obtained the following fingerprints: $fprs"

    if [[ -z "$1" || "$1" == '--all' ]] ; then
	log debug "publishing all keys"
	keys="${fprs[@]}"
    fi

    log debug "using keys: $keys"

    for key in $keys ; do
	if (( i++ > 0 )) ; then
	    printf "\n"
	fi
	log debug "invoking $cmd $key"
	"$cmd" "$key"
    done
}

# show info about the a key
show_key() {
    local id="$1"
    local GNUPGHOME
    local fingerprint
    local revokers

    # tmp gpghome dir
    export GNUPGHOME=$(msmktempdir)

    # trap to remove tmp dir if break
    trap "rm -rf $GNUPGHOME" EXIT

    # import the host key into the tmp dir
    gpg --quiet --import <"$HOST_KEY_FILE"

    # get the gpg fingerprint
    if gpg --quiet --list-keys \
	--with-colons --with-fingerprint "$id" \
	| grep '^fpr:' | cut -d: -f10 > "$GNUPGHOME"/fingerprint ; then
	fingerprint=$(cat "$GNUPGHOME"/fingerprint)
    else
	failure "ID '$id' not found."
    fi

    # list the host key info
    # FIXME: make no-show-keyring work so we don't have to do the grep'ing
    # FIXME: can we show uid validity somehow?
    gpg --list-keys --list-options show-unusable-uids "$fingerprint" 2>/dev/null \
        | grep -v "^${GNUPGHOME}/pubring.gpg$" \
        | egrep -v '^-+$' \
        | grep -v '^$'

    # list revokers, if there are any
    revokers=$(gpg --list-keys --with-colons --fixed-list-mode "$fingerprint" \
	| awk -F: '/^rvk:/{ print $10 }' )
    if [ "$revokers" ] ; then
	echo "The following keys are allowed to revoke this host key:"
	for key in $revokers ; do
	    echo "revoker: $key"
	done
    fi

    # list the pgp fingerprint
    echo "OpenPGP fingerprint: $fingerprint"

    # list the ssh fingerprint
    printf "ssh fingerprint: %s\n" \
    "$(gpg --export --no-armor "$fingerprint" 2>/dev/null | "$SYSSHAREDIR/keytrans" openpgp2sshfpr "$fingerprint")"

    # remove the tmp file
    trap - EXIT
    rm -rf "$GNUPGHOME"
}

########################################################################
# MAIN
########################################################################

# load configuration file
[ -e ${MONKEYSPHERE_HOST_CONFIG:="${SYSCONFIGDIR}/monkeysphere-host.conf"} ] \
    && . "$MONKEYSPHERE_HOST_CONFIG"

# set empty config variable with ones from the environment, or with
# defaults
LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=$LOG_LEVEL}
KEYSERVER=${MONKEYSPHERE_KEYSERVER:=$KEYSERVER}
log debug "using keyserver: $KEYSERVER"
CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=$CHECK_KEYSERVER}
MONKEYSPHERE_USER=${MONKEYSPHERE_MONKEYSPHERE_USER:=$MONKEYSPHERE_USER}
MONKEYSPHERE_GROUP=$(get_primary_group "$MONKEYSPHERE_USER")
PROMPT=${MONKEYSPHERE_PROMPT:=$PROMPT}

# other variables
GNUPGHOME_HOST=${MONKEYSPHERE_GNUPGHOME_HOST:="${MHDATADIR}"}
LOG_PREFIX=${MONKEYSPHERE_LOG_PREFIX:='ms: '}

# export variables needed in su invocation
export DATE
export LOG_LEVEL
export KEYSERVER
export CHECK_KEYSERVER
export MONKEYSPHERE_USER
export MONKEYSPHERE_GROUP
export PROMPT
export GNUPGHOME_HOST
export GNUPGHOME
export HOST_FINGERPRINT
export LOG_PREFIX

if [ "$#" -eq 0 ] ; then 
    usage
    failure "Please supply a subcommand."
fi

# get subcommand
COMMAND="$1"
shift

case $COMMAND in
    'import-key'|'import'|'i')
	source "${MHSHAREDIR}/import_key"
	import_key "$@"
	;;

    'show-keys'|'show-key'|'show'|'s')
	multi_key show_key "$@"
	;;

    'set-expire'|'extend-key'|'extend'|'e')
	source "${MHSHAREDIR}/set_expire"
	set_expire "$@"
	;;

    'add-servicename'|'add-hostname'|'add-name'|'n+')
	source "${MHSHAREDIR}/add_name"
	add_name "$@"
	;;

    'revoke-servicename'|'revoke-hostname'|'revoke-name'|'n-')
	source "${MHSHAREDIR}/revoke_name"
	revoke_name "$@"
	;;

    'add-revoker'|'r+')
	source "${MHSHAREDIR}/add_revoker"
	add_revoker "$@"
	;;

    'revoke-key')
	source "${MHSHAREDIR}/revoke_key"
	revoke_key "$@"
	;;

    'publish-keys'|'publish-key'|'publish'|'p')
	source "${MHSHAREDIR}/publish_key"
	multi_key publish_key "$@"
	;;

    'diagnostics'|'d')
	source "${MHSHAREDIR}/diagnostics"
	diagnostics
	;;

    'update-pgp-pub-file')
	update_pgp_pub_file
	;;

    'version'|'--version'|'v')
	version
	;;

    '--help'|'help'|'-h'|'h'|'?')
        usage
        ;;

    *)
        failure "Unknown command: '$COMMAND'
Try '$PGRM help' for usage."
        ;;
esac