ccn-extract-public-key.sh is a script to extract X509 certificate from CCNx keystore file
Usage:
./ccn-extract-public-key.sh [-h] (-D | -i ccnx_keystore_file) [-o output_file]
-i specify input keystore file
-D use default keystore file ($HOME/.ccnx/.ccnx_keystore)
-o specify output file (stdout by default)
Keystore password can be defined through CCNX_KEYSTORE_PASSWORD environment variable,
if not explicitly defined, the default CCNx keystore password will be used