src/share/ma/list_certifiers



# -*-shell-script-*-
# This should be sourced by bash (though we welcome changes to make it POSIX sh compliant)

# Monkeysphere authentication list-certifiers subcommand
#
# The monkeysphere scripts are written by:
# Jameson Rollins <jrollins@fifthhorseman.net>
# Jamie McClelland <jm@mayfirst.org>
# Daniel Kahn Gillmor <dkg@fifthhorseman.net>
#
# They are Copyright 2008-2009, and are all released under the GPL,
# version 3 or later.

# list the host certifiers

list_certifiers() {

local keys
local key
local authfpr
local keyfpr
local uid
local printedfpr

# find trusted keys in sphere keychain
log debug "finding trusted keys..."

# FIXME: this assumes that the keygrip (16 hex chars) is unique; we're
# only searching by keygrip at the moment.

authgrip=$(core_fingerprint | cut -b 25-40)

# We're walking the list of known signatures, and extracting all trust
# signatures made by the core fingerprint and known to the sphere
# keyring.

# for each one of these, we're printing (colon-delimited): the
# fingerprint, the trust depth, the trust level (60 == marginal, 120
# == full), and the domain regex (if any):

gpg_sphere "--fingerprint --with-colons --fixed-list-mode --check-sigs" | \
    cut -f 1,2,5,8,9,10 -d: | \
    egrep '^(fpr:::::|uat:|uid:|sig:!:'"$authgrip"':[[:digit:]]+ [[:digit:]]+:)' | \
    while IFS=: read -r type validity grip trustparams trustdomain fpr ; do
    case $type in
    'fpr') # this is a new key
        keyfpr=$fpr
        uid=
        printedfpr=no
        ;;
    'uid') # here comes a user id (if we don't have a key, or the
           # uid has no calculated validity, we will not bother
           # with it):
        if [ "$keyfpr" ] && [ "$validity" = 'f' ] ; then
        uid="$fpr"
        else
        uid=
        fi
        ;;
    'uat') # this is a user attribute. DETAILS.gz states that the
           # 10th field is the number of user attribute
           # subpackets, followed by the total number of bytes of
           # the subpackets:
        if [ "$keyfpr" ] && [ "$validity" = 'f' ] ; then
        uid=$(printf "%d JPEG(?) image(s), total %d bytes" \
            "${fpr%% *}" "${fpr##* }")
        else
        uid=
        fi
        ;;
    'sig') # print all trust signatures, including regexes if
           # present, assuming that
        if [ "$keyfpr" ] && [ "$uid" ] ; then
        trustdepth=${trustparams%% *}
        trustlevel=${trustparams##* }
        if [ "$printedfpr" = no ] ; then
            printf "%s:\n" "$keyfpr"
            printedfpr=yes
        fi

        # FIXME: this is clumsy and not human-friendly.  we should
        # print out more human-readable information, if possible.
        printf " :%s:%d:%d:%s\n" "$uid" "$trustdepth" "$trustlevel" "$trustdomain"
        fi
        ;;
    esac
done

}