tools: Allow specifying passphrase for ndnsec import/export in command line
Change-Id: Ic389249e017df27b0246cdd1fcd3a1431607246b
Refs: #4633
diff --git a/docs/manpages/ndnsec-export.rst b/docs/manpages/ndnsec-export.rst
index fb3c41f..dc94939 100644
--- a/docs/manpages/ndnsec-export.rst
+++ b/docs/manpages/ndnsec-export.rst
@@ -24,6 +24,12 @@
``-o output``
Write to an output file instead of the standard output.
+``-P passphrase``
+ Passphrase to use for the export. If not specified (or specified an empty passphrase), the
+ user is interactively asked to input the passphrase on the terminal. Note that specifying
+ passphrase via -P is insecure, as it can potentially end up in shell history, be visible in
+ ps output, etc.
+
``identity``
The identity name.