src/monkeysphere-server

   1 #!/bin/sh
   2
   3 # monkeysphere-server: MonkeySphere server admin 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 . "${SHAREDIR}/common"
  17
  18 # date in UTF format if needed
  19 DATE=$(date -u '+%FT%T')
  20
  21 # unset some environment variables that could screw things up
  22 GREP_OPTIONS=
  23
  24 ########################################################################
  25 # FUNCTIONS
  26 ########################################################################
  27
  28 usage() {
  29 cat <<EOF
  30 usage: $PGRM <subcommand> [args]
  31 Monkeysphere server admin tool.
  32
  33 subcommands:
  34   update-users (s) [USER]...            update users authorized_keys files
  35   gen-key (g)                           generate gpg key for the server
  36   publish-key (p)                       publish server key to keyserver
  37   trust-keys (t) KEYID...               mark keyids as trusted
  38   update-user-userids (u) USER UID...   add/update userids for a user
  39   help (h,?)                            this help
  40
  41 EOF
  42 }
  43
  44 # generate server gpg key
  45 gen_key() {
  46     # set key defaults
  47     KEY_TYPE=${KEY_TYPE:-"RSA"}
  48     KEY_LENGTH=${KEY_LENGTH:-"2048"}
  49     KEY_USAGE=${KEY_USAGE:-"encrypt,auth"}
  50     SERVICE=${SERVICE:-"ssh"}
  51     HOSTNAME_FQDN=${HOSTNAME_FQDN:-$(hostname -f)}
  52
  53     USERID=${USERID:-"$SERVICE"://"$HOSTNAME_FQDN"}
  54
  55     # set key parameters
  56     keyParameters=$(cat <<EOF
  57 Key-Type: $KEY_TYPE
  58 Key-Length: $KEY_LENGTH
  59 Key-Usage: $KEY_USAGE
  60 Name-Real: $USERID
  61 EOF
  62 )
  63
  64     # add the revoker field if requested
  65     if [ "$REVOKER" ] ; then
  66         keyParameters="${keyParameters}"$(cat <<EOF
  67
  68 Revoker: 1:$REVOKER sensitive
  69 EOF
  70 )
  71     fi
  72
  73     echo "The following key parameters will be used:"
  74     echo "$keyParameters"
  75
  76     read -p "generate key? [Y|n]: " OK; OK=${OK:=Y}
  77     if [ ${OK/y/Y} != 'Y' ] ; then
  78         failure "aborting."
  79     fi
  80
  81     if gpg --list-key ="$USERID" > /dev/null 2>&1 ; then
  82         failure "key for '$USERID' already exists"
  83     fi
  84
  85     # add commit command
  86     keyParameters="${keyParameters}"$(cat <<EOF
  87
  88 %commit
  89 %echo done
  90 EOF
  91 )
  92
  93     log "generating server key..."
  94     echo "$keyParameters" | gpg --batch --gen-key
  95 }
  96
  97 # publish server key to keyserver
  98 publish_key() {
  99     read -p "publish key to $KEYSERVER? [Y|n]: " OK; OK=${OK:=Y}
 100     if [ ${OK/y/Y} != 'Y' ] ; then
 101         failure "aborting."
 102     fi
 103
 104     keyID=$(gpg --list-key --with-colons ="$USERID" 2> /dev/null | grep '^pub:' | cut -d: -f5)
 105
 106     # dummy command so as not to publish fakes keys during testing
 107     # eventually:
 108     #gpg --send-keys --keyserver "$KEYSERVER" "$keyID"
 109     echo "NOT PUBLISHED: gpg --send-keys --keyserver $KEYSERVER $keyID"
 110 }
 111
 112 ########################################################################
 113 # MAIN
 114 ########################################################################
 115
 116 COMMAND="$1"
 117 [ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
 118 shift
 119
 120 # set ms home directory
 121 MS_HOME=${MS_HOME:-"$ETC"}
 122
 123 # load configuration file
 124 MS_CONF=${MS_CONF:-"$MS_HOME"/monkeysphere-server.conf}
 125 [ -e "$MS_CONF" ] && . "$MS_CONF"
 126
 127 # set empty config variable with defaults
 128 GNUPGHOME=${GNUPGHOME:-"$MS_HOME"/gnupg}
 129 KEYSERVER=${KEYSERVER:-subkeys.pgp.net}
 130 REQUIRED_KEY_CAPABILITY=${REQUIRED_KEY_CAPABILITY:-"e a"}
 131 USER_CONTROLLED_AUTHORIZED_KEYS=${USER_CONTROLLED_AUTHORIZED_KEYS:-%h/.ssh/authorized_keys}
 132
 133 export GNUPGHOME
 134
 135 # make sure gpg home exists with proper permissions
 136 mkdir -p -m 0700 "$GNUPGHOME"
 137
 138 case $COMMAND in
 139     'update-users'|'s')
 140         if [ "$1" ] ; then
 141             unames="$@"
 142         else
 143             unames=$(ls -1 "$MS_HOME"/authorized_user_ids)
 144         fi
 145
 146         for uname in $unames ; do
 147             MODE="authorized_keys"
 148
 149             log "----- user: $uname -----"
 150
 151             AUTHORIZED_USER_IDS="$MS_HOME"/authorized_user_ids/"$uname"
 152             msAuthorizedKeys="$CACHE"/"$uname"/authorized_keys
 153             cacheDir="$CACHE"/"$uname"/user_keys
 154
 155             # make sure authorized_user_ids file exists
 156             if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
 157                 log "authorized_user_ids file for '$uname' is empty or does not exist."
 158                 continue
 159             fi
 160
 161             # set user-controlled authorized_keys file path
 162             if [ "$USER_CONTROLLED_AUTHORIZED_KEYS" ] ; then
 163                 userHome=$(getent passwd "$uname" | cut -d: -f6)
 164                 userAuthorizedKeys=${USER_CONTROLLED_AUTHORIZED_KEYS/\%h/"$userHome"}
 165             fi
 166
 167             # update authorized_keys
 168             update_authorized_keys "$msAuthorizedKeys" "$userAuthorizedKeys" "$cacheDir"
 169         done
 170
 171         log "----- done. -----"
 172         ;;
 173
 174     'gen-key'|'g')
 175         gen_key
 176         ;;
 177
 178     'publish-key'|'p')
 179         publish_key
 180         ;;
 181
 182     'trust-keys'|'t')
 183         if [ -z "$1" ] ; then
 184             failure "you must specify at least one key to trust."
 185         fi
 186         for keyID ; do
 187             trust_key "$keyID"
 188         done
 189         ;;
 190
 191     'update-user-userids'|'u')
 192         uname="$1"
 193         shift
 194         if [ -z "$uname" ] ; then
 195             failure "you must specify user."
 196         fi
 197         if [ -z "$1" ] ; then
 198             failure "you must specify at least one userid."
 199         fi
 200         AUTHORIZED_USER_IDS="$MS_HOME"/authorized_user_ids/"$uname"
 201         cacheDir="$CACHE"/"$uname"/user_keys
 202         for userID ; do
 203             update_userid "$userID" "$cacheDir"
 204         done
 205         ;;
 206
 207     'help'|'h'|'?')
 208         usage
 209         ;;
 210
 211     *)
 212         failure "Unknown command: '$COMMAND'
 213 Type 'cereal-admin help' for usage."
 214         ;;
 215 esac