Can you export a key?

[bkreider <bk...@impactsci.com>]

I see the Genkey task and believe it will generate a key for me.  After
the key is generated I need to do something like:
keytool -export -alias tstkey -file testcert.crt
 
is there a task in ant that will do this?
 
I need this .crt file so I can sign my jar file.
 
Thanks.