src/monkeysphere-authentication

   1 #!/usr/bin/env bash
   2
   3 # monkeysphere-authentication: Monkeysphere authentication admin tool
   4 #
   5 # The monkeysphere scripts are written by:
   6 # Jameson Rollins <jrollins@finestructure.net>
   7 # Jamie McClelland <jm@mayfirst.org>
   8 # Daniel Kahn Gillmor <dkg@fifthhorseman.net>
   9 # Micah Anderson <micah@riseup.net>
  10 #
  11 # They are Copyright 2008-2009, and are all released under the GPL,
  12 # version 3 or later.
  13
  14 ########################################################################
  15 set -e
  16
  17 PGRM=$(basename $0)
  18
  19 SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}
  20 export SYSSHAREDIR
  21 . "${SYSSHAREDIR}/common" || exit 1
  22
  23 SYSDATADIR=${MONKEYSPHERE_SYSDATADIR:-"/var/lib/monkeysphere"}
  24 export SYSDATADIR
  25
  26 # sharedir for authentication functions
  27 MASHAREDIR="${SYSSHAREDIR}/ma"
  28
  29 # datadir for authentication functions
  30 MADATADIR="${SYSDATADIR}/authentication"
  31
  32 # temp directory to enable atomic moves of authorized_keys files
  33 MATMPDIR="${MADATADIR}/tmp"
  34 export MSTMPDIR
  35
  36 # UTC date in ISO 8601 format if needed
  37 DATE=$(date -u '+%FT%T')
  38
  39 # unset some environment variables that could screw things up
  40 unset GREP_OPTIONS
  41
  42 # default return code
  43 RETURN=0
  44
  45 ########################################################################
  46 # FUNCTIONS
  47 ########################################################################
  48
  49 usage() {
  50     cat <<EOF >&2
  51 usage: $PGRM <subcommand> [options] [args]
  52 Monkeysphere authentication admin tool.
  53
  54 subcommands:
  55  setup (s)                           setup monkeysphere user authentication
  56  update-users (u) [USER]...          update user authorized_keys files
  57  add-id-certifier (c+) KEYID         import and tsign a certification key
  58    --domain (-n) DOMAIN                limit ID certifications to DOMAIN
  59    --trust (-t) TRUST                  trust level of certifier (full)
  60    --depth (-d) DEPTH                  trust depth for certifier (1)
  61  remove-id-certifier (c-) KEYID      remove a certification key
  62  list-id-certifiers (c)              list certification keys
  63
  64  expert <expert-subcommand>          run expert command
  65  expert help                         expert command help
  66
  67  version (v)                         show version number
  68  help (h,?)                          this help
  69
  70 EOF
  71 }
  72
  73 # function to interact with the gpg core keyring
  74 gpg_core() {
  75     GNUPGHOME="$GNUPGHOME_CORE"
  76     export GNUPGHOME
  77
  78     gpg "$@"
  79 }
  80
  81 # function to interact with the gpg sphere keyring
  82 # FIXME: this function requires only a single argument because of
  83 # problems with quote expansion.  this needs to be fixed/improved.
  84 gpg_sphere() {
  85     GNUPGHOME="$GNUPGHOME_SPHERE"
  86     export GNUPGHOME
  87
  88     su_monkeysphere_user "gpg $@"
  89 }
  90
  91 # load the core fingerprint into the fingerprint variable, using the
  92 # gpg host secret key
  93 core_fingerprint() {
  94     log debug "determining core key fingerprint..."
  95     gpg_core --quiet --list-secret-key \
  96         --with-colons --fixed-list-mode --with-fingerprint \
  97         | grep ^fpr: | cut -d: -f10
  98 }
  99
 100 # export signatures from core to sphere
 101 gpg_core_sphere_sig_transfer() {
 102     log debug "exporting core local sigs to sphere..."
 103     gpg_core --export-options export-local-sigs --export | \
 104         gpg_sphere "--import-options import-local-sigs --import"
 105 }
 106
 107 ########################################################################
 108 # MAIN
 109 ########################################################################
 110
 111 # unset variables that should be defined only in config file
 112 unset KEYSERVER
 113 unset AUTHORIZED_USER_IDS
 114 unset RAW_AUTHORIZED_KEYS
 115 unset MONKEYSPHERE_USER
 116
 117 # load configuration file
 118 [ -e ${MONKEYSPHERE_AUTHENTICATION_CONFIG:="${SYSCONFIGDIR}/monkeysphere-authentication.conf"} ] && . "$MONKEYSPHERE_AUTHENTICATION_CONFIG"
 119
 120 # set empty config variable with ones from the environment, or with
 121 # defaults
 122 LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=${LOG_LEVEL:="INFO"}}
 123 KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="pool.sks-keyservers.net"}}
 124 AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:=${AUTHORIZED_USER_IDS:="%h/.monkeysphere/authorized_user_ids"}}
 125 RAW_AUTHORIZED_KEYS=${MONKEYSPHERE_RAW_AUTHORIZED_KEYS:=${RAW_AUTHORIZED_KEYS:="%h/.ssh/authorized_keys"}}
 126 MONKEYSPHERE_USER=${MONKEYSPHERE_MONKEYSPHERE_USER:=${MONKEYSPHERE_USER:="monkeysphere"}}
 127
 128 # other variables
 129 CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:="true"}
 130 REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
 131 GNUPGHOME_CORE=${MONKEYSPHERE_GNUPGHOME_CORE:="${MADATADIR}/core"}
 132 GNUPGHOME_SPHERE=${MONKEYSPHERE_GNUPGHOME_SPHERE:="${MADATADIR}/sphere"}
 133 CORE_KEYLENGTH=${MONKEYSPHERE_CORE_KEYLENGTH:="2048"}
 134
 135 # export variables needed in su invocation
 136 export DATE
 137 export MODE
 138 export LOG_LEVEL
 139 export MONKEYSPHERE_USER
 140 export KEYSERVER
 141 export CHECK_KEYSERVER
 142 export REQUIRED_USER_KEY_CAPABILITY
 143 export GNUPGHOME_CORE
 144 export GNUPGHOME_SPHERE
 145 export GNUPGHOME
 146 export CORE_KEYLENGTH
 147
 148 # get subcommand
 149 COMMAND="$1"
 150 [ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
 151 shift
 152
 153 case $COMMAND in
 154     'setup'|'setup'|'s')
 155         source "${MASHAREDIR}/setup"
 156         setup "$@"
 157         ;;
 158
 159     'update-users'|'update-user'|'u')
 160         source "${MASHAREDIR}/update_users"
 161         update_users "$@"
 162         ;;
 163
 164     'add-identity-certifier'|'add-id-certifier'|'add-certifier'|'c+')
 165         source "${MASHAREDIR}/add_certifier"
 166         add_certifier "$@"
 167         ;;
 168
 169     'remove-identity-certifier'|'remove-id-certifier'|'remove-certifier'|'c-')
 170         source "${MASHAREDIR}/remove_certifier"
 171         remove_certifier "$@"
 172         ;;
 173
 174     'list-identity-certifiers'|'list-id-certifiers'|'list-certifiers'|'list-certifier'|'c')
 175         source "${MASHAREDIR}/list_certifiers"
 176         list_certifiers "$@"
 177         ;;
 178
 179     'expert')
 180         SUBCOMMAND="$1"
 181         shift
 182         case "$SUBCOMMAND" in
 183             'help'|'h'|'?')
 184                 cat <<EOF
 185 usage: $PGRM expert <subcommand> [options] [args]
 186
 187 expert subcommands:
 188  diagnostics (d)                     monkeysphere authentication status
 189  gpg-cmd CMD                         execute gpg command
 190
 191 EOF
 192                 ;;
 193
 194             'diagnostics'|'d')
 195                 source "${MASHAREDIR}/diagnostics"
 196                 diagnostics
 197                 ;;
 198
 199             'gpg-cmd')
 200                 gpg_sphere "$@"
 201                 ;;
 202
 203             *)
 204                 failure "Unknown expert subcommand: '$COMMAND'
 205 Type '$PGRM help' for usage."
 206                 ;;
 207         esac
 208         ;;
 209
 210     'version'|'v')
 211         echo "$VERSION"
 212         ;;
 213
 214     '--help'|'help'|'-h'|'h'|'?')
 215         usage
 216         ;;
 217
 218     *)
 219         failure "Unknown command: '$COMMAND'
 220 Type '$PGRM help' for usage."
 221         ;;
 222 esac
 223
 224 exit "$RETURN"