X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fshare%2Fma%2Fadd_certifier;h=2e53455b144dc2f77e002b94038d33b8b2fca7d3;hb=07316c65eb5302a1d5385301876be7971e26fd1f;hp=0c3c647663db387a98ed70e88574f7b8e9ca4cdc;hpb=33888714f26a775b3be54edb27d77de719d5939c;p=monkeysphere.git

diff --git a/src/share/ma/add_certifier b/src/share/ma/add_certifier
index 0c3c647..2e53455 100644
--- a/src/share/ma/add_certifier
+++ b/src/share/ma/add_certifier
@@ -3,6 +3,20 @@
 
 # Monkeysphere authentication add-certifier subcommand
 #
+# This function adds a certifier whose signatures will be used to
+# calculate validity of keys used to connect to user accounts on the
+# server.  The specified certifier key is first retrieved from the Web
+# of Trust with the monkeysphere-user-controlled gpg_sphere keyring.
+# Once then new key is retrieved, it is imported into the core
+# keyring.  The gpg_core then ltsigns the key with the desired trust
+# level, and then the key is exported back to the gpg_sphere keyring.
+# The gpg_sphere has ultimate owner trust of the core key, so the core
+# ltsigs on the new certifier key can then be used by gpg_sphere
+# calculate validity for keys inserted in the authorized_keys file.
+#
+# This is all to keep the monkeysphere user that connects to the
+# keyservers from accessing the core secret key.
+#
 # The monkeysphere scripts are written by:
 # Jameson Rollins <jrollins@finestructure.net>
 # Jamie McClelland <jm@mayfirst.org>
@@ -11,23 +25,18 @@
 # They are Copyright 2008-2009, and are all released under the GPL,
 # version 3 or later.
 
-# retrieve key from web of trust, import it into the host keyring, and
-# ltsign the key in the host keyring so that it may certify other keys
-
 add_certifier() {
 
-local domain
-local trust
-local depth
+local domain=
+local trust=full
+local depth=1
 local keyID
+local importinfo
 local fingerprint
 local ltsignCommand
 local trustval
 
-# set default values for trust depth and domain
-domain=
-trust=full
-depth=1
+PROMPT=true
 
 # get options
 while true ; do
@@ -44,6 +53,10 @@ while true ; do
 	    depth="$2"
 	    shift 2
 	    ;;
+	-y)
+	    PROMPT=false
+	    shift 1
+	    ;;
 	*)
 	    if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then
 		failure "Unknown option '$1'.
@@ -59,7 +72,7 @@ if [ -z "$keyID" ] ; then
     failure "You must specify the key ID of a key to add, or specify a file to read the key from."
 fi
 if [ -f "$keyID" ] ; then
-    echo "Reading key from file '$keyID':"
+    log info "Reading key from file '$keyID':"
     importinfo=$(gpg_sphere "--import" < "$keyID" 2>&1) || failure "could not read key from '$keyID'"
     # FIXME: if this is tried when the key database is not
     # up-to-date, i got these errors (using set -x):
@@ -79,45 +92,55 @@ if [ -f "$keyID" ] ; then
 
     keyID=$(echo "$importinfo" | grep '^gpg: key ' | cut -f2 -d: | cut -f3 -d\ )
     if [ -z "$keyID" ] || [ $(echo "$keyID" | wc -l) -ne 1 ] ; then
-	failure "Expected there to be a single gpg key in the file."
+	failure "There was not exactly one gpg key in the file."
     fi
 else
     # get the key from the key server
+    log debug "retrieving key from keyserver..."
     gpg_sphere "--keyserver $KEYSERVER --recv-key '0x${keyID}!'" || failure "Could not receive a key with this ID from the '$KEYSERVER' keyserver."
 fi
 
 export keyID
 
 # get the full fingerprint of a key ID
-fingerprint=$(gpg_sphere "--list-key --with-colons --with-fingerprint 0x${keyID}!" | \
-    grep '^fpr:' | grep "$keyID" | cut -d: -f10)
+log debug "getting fingerprint of certifier key..."
+fingerprint=$(gpg_sphere "--list-key --with-colons --with-fingerprint 0x${keyID}!" \
+    | grep '^fpr:' | grep "$keyID" | cut -d: -f10)
 
 if [ -z "$fingerprint" ] ; then
     failure "Key '$keyID' not found."
 fi
 
-echo
-echo "key found:"
+log info "key found:"
 gpg_sphere "--fingerprint 0x${fingerprint}!"
 
-echo "Are you sure you want to add the above key as a"
-read -p "certifier of users on this system? (y/N) " OK; OK=${OK:-N}
-if [ "${OK/y/Y}" != 'Y' ] ; then
-    failure "Identity certifier not added."
+if [ "$PROMPT" = true ] ; then
+    echo "Are you sure you want to add the above key as a"
+    read -p "certifier of users on this system? (y/N) " OK; OK=${OK:-N}
+    if [ "${OK/y/Y}" != 'Y' ] ; then
+	failure "Identity certifier not added."
+    fi
+else
+    log debug "adding key without prompting."
 fi
 
-# export the key to the host keyring
+# export the key to the core keyring so that the core can sign the
+# new certifier key
 gpg_sphere "--export 0x${fingerprint}!" | gpg_core --import
 
-if [ "$trust" = marginal ]; then
-    trustval=1
-elif [ "$trust" = full ]; then
-    trustval=2
-else
-    failure "Trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)."
-fi
-
-# ltsign command
+case "$trust" in
+    'marginal')
+	trustval=1
+	;;
+    'full')
+	trustval=2
+	;;
+    *)
+	failure "Trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)."
+	;;
+esac
+
+# edit-key script to ltsign key
 # NOTE: *all* user IDs will be ltsigned
 ltsignCommand=$(cat <<EOF
 ltsign
@@ -130,15 +153,17 @@ save
 EOF
     )
 
-# ltsign the key
+# core ltsigns the newly imported certifier key
 if echo "$ltsignCommand" | \
     gpg_core --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then
 
-    # update the trustdb for the authentication keyring
+    # transfer the new sigs back to the sphere keyring
+    gpg_core_sphere_sig_transfer
+
+    # update the sphere trustdb
     gpg_sphere "--check-trustdb"
 
-    echo
-    echo "Identity certifier added."
+    log info "Identity certifier added."
 else
     failure "Problem adding identify certifier."
 fi