Feat(config): adds PASSPHRASE_COMMAND parameter

bin/mine

@@ -54,6 +54,11 @@ echo ">started at: $DATE"                  > $LOG
 echo ">build flags: $MKP224O_BUILD_FLAGS" >> $LOG
 cat $FILTERS | xargs echo ">filters:"     >> $LOG
 
+# Check for PASSPHRASE_COMMAND
+if [ ! -z "$PASSPHRASE_COMMAND" ]; then
+  PASSPHRASE="`$PASSPHRASE_COMMAND`"
+fi
+
 # Run
 echo "$BASENAME: starting mkp224o..."
 $BASEDIR/bin/mkp224o $MKP224O_RUN_FLAGS 2>&1 | tee -a $LOG

onionmine.conf.sample

@@ -85,9 +85,15 @@ MKP224O_RUN_FLAGS="-s -d $CANDIDATES -f $FILTERS -B"
 # Store the passphrase in a variable (not recommended)
 #PASSPHRASE=""
 
-# Fetch the passphrase using https://0xacab.org/rhatto/keyringer/
-# Different values of $CONFIG might have different keys
-#PASSPHRASE="`keyringer my-keyring decrypt onionmine/$CONFIG/passphrase 2> /dev/null | head -1`"
+# Fetch the passphrase an external command
+#
+# Any external command can be used as long as it returns a passphrase in the
+# standard output.
+#
+# Different values of $CONFIG might have different keys.
+#
+# The following example uses https://0xacab.org/rhatto/keyringer/
+#PASSPHRASE_COMMAND="keyringer my-keyring decrypt onionmine/$CONFIG/passphrase 2> /dev/null | head -1"
 
 #
 # Other options