From 0c874fdd6abfa4b74d7805f2d2d121f08211b4aa Mon Sep 17 00:00:00 2001
From: Jameson Graef Rollins <jrollins@finestructure.net>
Date: Mon, 16 Feb 2009 20:15:58 -0500
Subject: [PATCH] Stop all creation of a ssh_host_rsa_key.pub.  Use openpgp2ssh
 to get the fingerprint from the host pgp public key.  Prevents us from having
 to maintain the ssh pub key file, and generally makes things simpler. Also
 allows us to go back to having import_key take the key on stdin (which dkg
 will like).

---
 src/monkeysphere-host   | 40 ++++++++++++----------------------------
 src/share/mh/import_key | 18 ++++++------------
 2 files changed, 18 insertions(+), 40 deletions(-)

diff --git a/src/monkeysphere-host b/src/monkeysphere-host
index d6e4c68..64023e0 100755
--- a/src/monkeysphere-host
+++ b/src/monkeysphere-host
@@ -37,8 +37,7 @@ MHTMPDIR="${MHDATADIR}/tmp"
 export MHTMPDIR
 
 # host pub key files
-HOST_KEY_PUB="${SYSDATADIR}/ssh_host_rsa_key.pub"
-HOST_KEY_PUB_GPG="${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"
+HOST_KEY_FILE="${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"
 
 # UTC date in ISO 8601 format if needed
 DATE=$(date -u '+%FT%T')
@@ -95,17 +94,12 @@ gpg_host_edit() {
 	"0x${HOST_FINGERPRINT}!" "$@"
 }
 
-# export the host key to stdout
-gpg_host_export() {
-    gpg_host --export --armor --export-options export-minimal \
-	"0x${HOST_FINGERPRINT}!"
-}
-
 # export the host public key to the monkeysphere gpg pub key file
 create_gpg_pub_file() {
     log debug "creating openpgp public key file..."
-    gpg_host_export > "$HOST_KEY_PUB_GPG"
-    log info "GPG host public key file: $HOST_KEY_PUB_GPG"
+    gpg_host --export --armor --export-options export-minimal \
+	"0x${HOST_FINGERPRINT}!" > "$HOST_KEY_FILE"
+    log info "GPG host public key file: $HOST_KEY_FILE"
 }
 
 # load the host fingerprint into the fingerprint variable, using the
@@ -114,12 +108,12 @@ create_gpg_pub_file() {
 # stuff.  is there a way we can do this without having to create temp
 # files?
 load_fingerprint() {
-    if [ -f "$HOST_KEY_PUB_GPG" ] ; then
+    if [ -f "$HOST_KEY_FILE" ] ; then
 	HOST_FINGERPRINT=$( \
 	    (FUBAR=$(mktemp -d) && export GNUPGHOME="$FUBAR" \
 	    && gpg --quiet --import \
 	    && gpg --quiet --list-keys --with-colons --with-fingerprint \
-	    && rm -rf "$FUBAR") <"$HOST_KEY_PUB_GPG" \
+	    && rm -rf "$FUBAR") <"$HOST_KEY_FILE" \
 	    | grep '^fpr:' | cut -d: -f10 )
     else
 	HOST_FINGERPRINT=
@@ -135,13 +129,6 @@ load_fingerprint_secret() {
 	| grep '^fpr:' | cut -d: -f10 )
 }
 
-# output host key ssh fingerprint
-load_ssh_fingerprint() {
-    [ -f "$HOST_KEY_PUB" ] || return 0
-    HOST_FINGERPRINT_SSH=$(ssh-keygen -l -f "$HOST_KEY_PUB" \
-	| awk '{ print $1, $2, $4 }')
-}
-
 # fail if host key present
 check_host_key() {
     [ -z "$HOST_FINGERPRINT" ] \
@@ -186,13 +173,11 @@ show_key() {
 
     echo "OpenPGP fingerprint: $HOST_FINGERPRINT"
 
-    load_ssh_fingerprint
-
-    if [ "$HOST_FINGERPRINT_SSH" ] ; then
-	echo "ssh fingerprint: $HOST_FINGERPRINT_SSH"
-    else
-	log error "SSH host key not found."
-    fi
+    echo -n "ssh fingerprint: "
+    ssh-keygen -l -f /dev/stdin \
+	<<<$( gpg_host --export FEE16FA3 2>/dev/null \
+	| openpgp2ssh 8445B5203A8443B4B04F637DD4DE66B2FEE16FA3 2>/dev/null) \
+	| awk '{ print $1, $2, $4 }'
 
     # FIXME: other relevant key parameters?
 }
@@ -229,7 +214,6 @@ export KEYSERVER
 export GNUPGHOME_HOST
 export GNUPGHOME
 export HOST_FINGERPRINT=
-export HOST_FINGERPRINT_SSH=
 
 # get subcommand
 COMMAND="$1"
@@ -294,7 +278,7 @@ case $COMMAND in
 usage: $PGRM expert <subcommand> [options] [args]
 
 expert subcommands:
- import-key (i) FILE [NAME[:PORT]]   import existing ssh key to gpg
+ import-key (i) [NAME[:PORT]]        import existing ssh key to gpg
  gen-key (g) [NAME[:PORT]]           generate gpg key for the host
    --length (-l) BITS                  key length in bits (2048)
  diagnostics (d)                     monkeysphere host status
diff --git a/src/share/mh/import_key b/src/share/mh/import_key
index e5982ca..74dc0b3 100644
--- a/src/share/mh/import_key
+++ b/src/share/mh/import_key
@@ -13,14 +13,10 @@
 
 import_key() {
 
-local keyFile
 local hostName
 local userID
 
-keyFile="$1"
-[ -f "$keyFile" ]
-
-hostName=${2:-$(hostname -f)}
+hostName=${1:-$(hostname -f)}
 userID="ssh://${hostName}"
 
 # create host home
@@ -31,17 +27,15 @@ chmod 700 "${GNUPGHOME_HOST}"
 
 log verbose "importing ssh key..."
 # translate ssh key to a private key
-PEM2OPENPGP_USAGE_FLAGS=authenticate pem2openpgp "$userID" <"$keyFile" \
+PEM2OPENPGP_USAGE_FLAGS=authenticate pem2openpgp "$userID" \
     | gpg_host --import
 
-# load the new host fpr into the fpr variable
+# load the new host fpr into the fpr variable.  this is so we can
+# create the gpg pub key file.  we have to do this from the secret key
+# ring since we obviously don't have the gpg pub key file yet, since
+# that's what we're trying to produce (see below).
 load_fingerprint_secret
 
-# export the host public key to the monkeysphere ssh pub key file
-log debug "creating ssh public key file..."
-ssh-keygen -y -f "$keyFile" > "$HOST_KEY_PUB"
-log info "SSH host public key file: $HOST_KEY_PUB"
-
 # export to gpg public key to file
 create_gpg_pub_file
 
-- 
2.26.2