Add new keys-from-userid subcommand to monkeysphere UI.

This new subcommand calls a new function, keys_from_userid, that
outputs to stdout all acceptable keys for a given user ID literal.

2 files changed, 62 insertions, 2 deletions

diff --git a/src/monkeysphere b/src/monkeysphere
index 9fff77a..0726ff9 100755
--- a/src/monkeysphere
+++ b/src/monkeysphere
@@ -45,12 +45,15 @@ Monkeysphere client tool.
 subcommands:
  update-known_hosts (k) [HOST]...    update known_hosts file
  update-authorized_keys (a)          update authorized_keys file
- gen-subkey (g) [KEYID]              generate an authentication subkey
-   --length (-l) BITS                  key length in bits (2048)
  ssh-proxycommand HOST [PORT]        monkeysphere ssh ProxyCommand
    --no-connect                        do not make TCP connection to host
  subkey-to-ssh-agent (s)             store authentication subkey in ssh-agent
  sshfpr (f) KEYID                    output ssh fingerprint of gpg key
+
+ keys-from-userid (u) USERID         output valid keys for user id literal
+ gen-subkey (g) [KEYID]              generate an authentication subkey
+   --length (-l) BITS                  key length in bits (2048)
+
  version (v)                         show version number
  help (h,?)                          this help
 
@@ -268,6 +271,10 @@ case $COMMAND in
 	gpg_ssh_fingerprint "$@"
 	;;
 
+    'keys-from-userid'|'u')
+	keys_from_userid "$@"
+	;;
+
     'version'|'v')
 	version
 	;;
diff --git a/src/share/common b/src/share/common
index 0c06dde..28da3c0 100644
--- a/src/share/common
+++ b/src/share/common
@@ -752,6 +752,59 @@ process_user_id() {
     # being processed in the key files over "bad" keys (key flag '1')
 }
 
+# output all valid keys for specified user ID literal
+keys_from_userid() {
+    local userID
+    local noKey=
+    local nKeys
+    local nKeysOK
+    local ok
+    local sshKey
+    local tmpfile
+
+    userID="$1"
+
+    log verbose "processing: $userID"
+
+    nKeys=0
+    nKeysOK=0
+
+    IFS=$'\n'
+    for line in $(process_user_id "${userID}") ; do
+	# note that key was found
+	nKeys=$((nKeys+1))
+
+	ok=$(echo "$line" | cut -d: -f1)
+	sshKey=$(echo "$line" | cut -d: -f2)
+
+        if [ -z "$sshKey" ] ; then
+            continue
+        fi
+
+	# if key OK, output key to stdout
+	if [ "$ok" -eq '0' ] ; then
+	    # note that key was found ok
+	    nKeysOK=$((nKeysOK+1))
+
+	    printf '%s\n' "$sshKey"
+	fi
+    done
+
+    # if at least one key was found...
+    if [ "$nKeys" -gt 0 ] ; then
+	# if ok keys were found, return 0
+	if [ "$nKeysOK" -gt 0 ] ; then
+	    return 0
+	# else return 2
+	else
+	    return 2
+	fi
+    # if no keys were found, return 1
+    else
+	return 1
+    fi
+}
+
 # process a single host in the known_host file
 process_host_known_hosts() {
     local host