src/monkeysphere

   1 #!/bin/sh
   2
   3 # monkeysphere: MonkeySphere client tool
   4 #
   5 # The monkeysphere scripts are written by:
   6 # Jameson Rollins <jrollins@fifthhorseman.net>
   7 #
   8 # They are Copyright 2008, and are all released under the GPL, version 3
   9 # or later.
  10
  11 ########################################################################
  12 PGRM=$(basename $0)
  13
  14 SHAREDIR=${SHAREDIR:-"/usr/share/monkeysphere"}
  15 export SHAREDIR
  16 . "${SHAREDIR}/common"
  17
  18 GLOBAL_CONFIG=${GLOBAL_CONFIG:-"${ETC}/monkeysphere.conf"}
  19 [ -r "$GLOBAL_CONFIG" ] && . "$GLOBAL_CONFIG"
  20
  21 # date in UTF format if needed
  22 DATE=$(date -u '+%FT%T')
  23
  24 # unset some environment variables that could screw things up
  25 GREP_OPTIONS=
  26
  27 ########################################################################
  28 # FUNCTIONS
  29 ########################################################################
  30
  31 usage() {
  32 cat <<EOF
  33 usage: $PGRM <subcommand> [args]
  34 Monkeysphere client tool.
  35
  36 subcommands:
  37   update-known_hosts (k) [HOST]...  update known_hosts file
  38   update-userids (u) [USERID]...    add/update userid
  39   update-authorized_keys (a)        update authorized_keys file
  40   gen-ae-subkey (g) KEYID           generate an 'ae' capable subkey
  41   help (h,?)                        this help
  42
  43 EOF
  44 }
  45
  46 # generate a subkey with the 'a' and 'e' usage flags set
  47 gen_ae_subkey(){
  48     local keyID
  49     local gpgOut
  50     local userID
  51
  52     log "warning: this function is still not working."
  53
  54     keyID="$1"
  55
  56     # set subkey defaults
  57     SUBKEY_TYPE=${KEY_TYPE:-"RSA"}
  58     SUBKEY_LENGTH=${KEY_LENGTH:-"1024"}
  59     SUBKEY_USAGE=${KEY_USAGE:-"encrypt,auth"}
  60
  61     gpgOut=$(gpg --fixed-list-mode --list-keys --with-colons \
  62         "$keyID" 2> /dev/null)
  63
  64     # return 1 if there only "tru" lines are output from gpg
  65     if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then
  66         log "  key not found."
  67         return 1
  68     fi
  69
  70     userID=$(echo "$gpgOut" | grep "^uid:" | cut -d: -f10)
  71
  72     # set key parameters
  73     keyParameters=$(cat <<EOF
  74 Subkey-Type: $SUBKEY_TYPE
  75 Subkey-Length: $SUBKEY_LENGTH
  76 Subkey-Usage: $SUBKEY_USAGE
  77 Name-Real: $userID
  78 EOF
  79 )
  80
  81     echo "The following key parameters will be used:"
  82     echo "$keyParameters"
  83
  84     read -p "generate key? [Y|n]: " OK; OK=${OK:=Y}
  85     if [ ${OK/y/Y} != 'Y' ] ; then
  86         failure "aborting."
  87     fi
  88
  89     # add commit command
  90     keyParameters="${keyParameters}"$(cat <<EOF
  91
  92 %commit
  93 %echo done
  94 EOF
  95 )
  96
  97     echo "generating subkey..."
  98     echo "$keyParameters" | gpg --batch --gen-key
  99 }
 100
 101 ########################################################################
 102 # MAIN
 103 ########################################################################
 104
 105 COMMAND="$1"
 106 [ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
 107 shift
 108
 109 # set ms home directory
 110 MS_HOME=${MS_HOME:-"${HOME}/.config/monkeysphere"}
 111
 112 # load configuration file
 113 MS_CONF=${MS_CONF:-"${MS_HOME}/monkeysphere.conf"}
 114 [ -e "$MS_CONF" ] && . "$MS_CONF"
 115
 116 # set empty config variable with defaults
 117 AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"${MS_HOME}/authorized_user_ids"}
 118 GNUPGHOME=${GNUPGHOME:-"${HOME}/.gnupg"}
 119 KEYSERVER=${KEYSERVER:-"subkeys.pgp.net"}
 120 REQUIRED_KEY_CAPABILITY=${REQUIRED_KEY_CAPABILITY:-"e a"}
 121 USER_CONTROLLED_AUTHORIZED_KEYS=${USER_CONTROLLED_AUTHORIZED_KEYS:-"%h/.ssh/authorized_keys"}
 122 USER_KNOWN_HOSTS=${USER_KNOWN_HOSTS:-"${HOME}/.ssh/known_hosts"}
 123 HASH_KNOWN_HOSTS=${HASH_KNOWN_HOSTS:-"true"}
 124
 125 export GNUPGHOME
 126
 127 # stagging locations
 128 hostKeysCacheDir="${MS_HOME}/host_keys"
 129 userKeysCacheDir="${MS_HOME}/user_keys"
 130 msAuthorizedKeys="${MS_HOME}/authorized_keys"
 131
 132 # make sure gpg home exists with proper permissions
 133 mkdir -p -m 0700 "$GNUPGHOME"
 134
 135 # make sure the user monkeysphere home directory exists
 136 mkdir -p -m 0700 "$MS_HOME"
 137 mkdir -p "$hostKeysCacheDir"
 138 mkdir -p "$userKeysCacheDir"
 139
 140 case $COMMAND in
 141     'update-known_hosts'|'update-known-hosts'|'k')
 142         MODE='known_hosts'
 143
 144         # touch the known_hosts file to make sure it exists
 145         # ssh-keygen complains if it doesn't exist
 146         touch "$USER_KNOWN_HOSTS"
 147
 148         # if hosts are specified on the command line, process just
 149         # those hosts
 150         if [ "$1" ] ; then
 151             for host ; do
 152                 process_host "$host" "$hostKeysCacheDir"
 153             done
 154
 155         # otherwise, if no hosts are specified, process every user
 156         # in the user's known_hosts file
 157         else
 158             if [ ! -s "$USER_KNOWN_HOSTS" ] ; then
 159                 failure "known_hosts file '$USER_KNOWN_HOSTS' is empty."
 160             fi
 161             log "processing known_hosts file..."
 162             process_known_hosts "$USER_KNOWN_HOSTS" "$hostKeysCacheDir"
 163         fi
 164         ;;
 165
 166     'update-authorized_keys'|'update-authorized-keys'|'a')
 167         MODE='authorized_keys'
 168
 169         # make sure authorized_user_ids file exists
 170         if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
 171             failure "authorized_user_ids file is empty or does not exist."
 172         fi
 173
 174         # set user-controlled authorized_keys file path
 175         userAuthorizedKeys=${USER_CONTROLLED_AUTHORIZED_KEYS/\%h/"$HOME"}
 176
 177         # update authorized_keys
 178         update_authorized_keys "$msAuthorizedKeys" "$userAuthorizedKeys" "$userKeysCacheDir"
 179         ;;
 180
 181     'update-userids'|'u')
 182         if [ -z "$1" ] ; then
 183             failure "you must specify at least one userid."
 184         fi
 185         for userID ; do
 186             update_userid "$userID" "$userKeysCacheDir"
 187         done
 188         ;;
 189
 190     'gen-ae-subkey'|'g')
 191         keyID="$1"
 192         if [ -z "$keyID" ] ; then
 193             failure "you must specify keyid of primary key."
 194         fi
 195         gen_ae_subkey "$keyID"
 196         ;;
 197
 198     'help'|'h'|'?')
 199         usage
 200         ;;
 201
 202     *)
 203         failure "Unknown command: '$COMMAND'
 204 Type 'cereal-admin help' for usage."
 205         ;;
 206 esac