Vysper uses Java's keystore format, which is explained starting here: [1]
Citation from a source code comment in Vysper:
// NOTE: The keystore 'bogus_mina_tls.cert' was generated using keytool:
// keytool -genkey -alias bogus -keysize 512 -validity 3650
// -keyalg RSA -dname "CN=bogus.com, OU=XXX CA,
// O=BogusTrustManagerFactory Inc, L=Stockholm,
S=Stockholm, C=SE"
// -keypass boguspw -storepass boguspw -keystore bogus.cert
Of course, this keystore is only intended for dev purposes.
[1]
http://docs.oracle.com/javase/7/docs/technotes/tool<http://docs.oracle.com/javase/7/docs/technotes/tools/index.html#security>
s/index.html#security<http://docs.oracle.com/javase/7/docs/technotes/tools/index.html#security>
Bernd
