javax.net ssl debugging java.security plus plus

JSSE extends this facility by consulting the javax.net.debug property for the following options:

all
Turn on all options and sub-options.
ssl
Turn on SSL debugging. This option has the following sub-options (all of which are in force if none are specified):
record
Print a trace of each SSL record (at the SSL protocol level).
handshake
Print each handshake message as it is received.
keygen
Print key generation data for the secret key exchange.
session
Print SSL session activity.
defaultctx
Print the default SSL initialization information.
sslctx
Print information about the SSL context.
sessioncache
Print information about the SSL session cache.
keymanager
Print information about calls to the key manager.
trustmanager
Print information about calls to the trust manager.
data
For handshake tracing, print out a hex dump of each message.
verbose
For handshake tracing, print out verbose information.
plaintext

For record tracing, print out a hex dump of the record. As you progress through the samples in the book, you can turn various options on in order to see more information about what's going on.