More work on finishing add/revoke hostname functions.

[monkeysphere.git] / src / monkeysphere

diff --git a/src/monkeysphere b/src/monkeysphere
index 3f127e6f1c0f7dd49a2c08517814350d992ee602..f959a386f56b82ef0f1e51079ff31bd0ae78a862 100755 (executable)
--- a/src/monkeysphere
+++ b/src/monkeysphere
@@ -32,23 +32,22 @@ umask 077
 ########################################################################
 
 usage() {
-cat <<EOF
+    cat <<EOF
 usage: $PGRM <subcommand> [options] [args]
 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 'a' capable subkey
-    -l|--length BITS                  key length in bits (2048)
-    -e|--expire EXPIRE                date to expire
-  help (h,?)                        this help
+ update-known_hosts (k) [HOST]...    update known_hosts file
+ update-authorized_keys (a)          update authorized_keys file
+ gen-subkey (g) KEYID                generate an 'a' capable subkey
+   --length (-l) BITS                  key length in bits (2048)
+   --expire (-e) EXPIRE                date to expire
+ help (h,?)                          this help
 
 EOF
 }
 
 # generate a subkey with the 'a' usage flags set
-# FIXME: this needs some tweaking to clean it up
 gen_subkey(){
     local keyLength
     local keyExpire
@@ -89,9 +88,22 @@ gen_subkey(){
        esac
     done
 
-    keyID="$1"
+    if [ -z "$1" ] ; then
+       # find all secret keys
+       keyID=$(gpg --with-colons --list-secret-keys | grep ^sec | cut -f5 -d:)
+       # if multiple sec keys exist, fail
+       if (( $(echo "$keyID" | wc -l) > 1 )) ; then
+           echo "Multiple secret keys found:"
+           echo "$keyID"
+           failure "Please specify which primary key to use."
+       fi
+    else
+       keyID="$1"
+    fi
     if [ -z "$keyID" ] ; then
-       failure "You must specify the key ID of your primary key."
+       failure "You have no secret key available.  You should create an OpenPGP
+key before joining the monkeysphere. You can do this with:
+   gpg --gen-key"
     fi
 
     # get key output, and fail if not found
@@ -150,7 +162,18 @@ EOF
 )
 
     log "generating subkey..."
-    echo "$editCommands" | gpg --expert --command-fd 0 --edit-key "$keyID"
+    fifoDir=$(mktemp -d)
+    (umask 077 && mkfifo "$fifoDir/pass")
+    echo "$editCommands" | gpg --passphrase-fd 3 3< "$fifoDir/pass" --expert --command-fd 0 --edit-key "$keyID" &
+    
+    if [ "$DISPLAY" ] && which ssh-askpass >/dev/null; then
+       ssh-askpass "Please enter your passphrase for $keyID: " > "$fifoDir/pass"
+    else
+       read -s -p "Please enter your passphrase for $keyID: " PASS
+       echo "$PASS" > "$fifoDir/pass"
+    fi
+    rm -rf "$fifoDir"
+    wait
     log "done."
 }
 
@@ -178,7 +201,16 @@ mkdir -p -m 0700 "$MONKEYSPHERE_HOME"
 # set empty config variables with ones from the environment, or from
 # config file, or with defaults
 GNUPGHOME=${MONKEYSPHERE_GNUPGHOME:=${GNUPGHOME:="${HOME}/.gnupg"}}
-KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="subkeys.pgp.net"}}
+KEYSERVER=${MONKEYSPHERE_KEYSERVER:="$KEYSERVER"}
+# if keyserver not specified in env or monkeysphere.conf,
+# look in gpg.conf
+if [ -z "$KEYSERVER" ] ; then
+    if [ -f "${GNUPGHOME}/gpg.conf" ] ; then
+       KEYSERVER=$(grep -e "^[[:space:]]*keyserver " "${GNUPGHOME}/gpg.conf" | tail -1 | awk '{ print $2 }')
+    fi
+fi
+# if it's still not specified, use the default
+KEYSERVER=${KEYSERVER:="subkeys.pgp.net"}
 CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
 KNOWN_HOSTS=${MONKEYSPHERE_KNOWN_HOSTS:=${KNOWN_HOSTS:="${HOME}/.ssh/known_hosts"}}
 HASH_KNOWN_HOSTS=${MONKEYSPHERE_HASH_KNOWN_HOSTS:=${HASH_KNOWN_HOSTS:="true"}}
@@ -203,8 +235,9 @@ case $COMMAND in
     'update-known_hosts'|'update-known-hosts'|'k')
        MODE='known_hosts'
 
+       # check permissions on the known_hosts file path
        if ! check_key_file_permissions "$USER" "$KNOWN_HOSTS" ; then
-           failure "Improper permissions on known_hosts file."
+           failure "Improper permissions on known_hosts file path."
        fi
 
         # if hosts are specified on the command line, process just
@@ -216,8 +249,10 @@ case $COMMAND in
         # otherwise, if no hosts are specified, process every host
         # in the user's known_hosts file
        else
+           # exit if the known_hosts file does not exist
            if [ ! -e "$KNOWN_HOSTS" ] ; then
-               failure "known_hosts file '$KNOWN_HOSTS' does not exist."
+               log "known_hosts file '$KNOWN_HOSTS' does not exist."
+               exit
            fi
 
            process_known_hosts
@@ -228,13 +263,20 @@ case $COMMAND in
     'update-authorized_keys'|'update-authorized-keys'|'a')
        MODE='authorized_keys'
 
-        # fail if the authorized_user_ids file is empty
-       if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
-           failure "authorized_user_ids file '$AUTHORIZED_USER_IDS' does not exist."
+       # check permissions on the authorized_user_ids file path
+       if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
+           failure "Improper permissions on authorized_user_ids file path."
        fi
 
-       if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
-           failure "Improper permissions on authorized_user_ids file."
+       # check permissions on the authorized_keys file path
+       if ! check_key_file_permissions "$USER" "$AUTHORIZED_KEYS" ; then
+           failure "Improper permissions on authorized_keys file path."
+       fi
+
+        # exit if the authorized_user_ids file is empty
+       if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
+           log "authorized_user_ids file '$AUTHORIZED_USER_IDS' does not exist."
+           exit
        fi
 
        # process authorized_user_ids file