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from __future__ import absolute_import
from __future__ import print_function
import argparse
import sys
from nss.error import NSPRError
import nss.io as io
import nss.nss as nss
import nss.ssl as ssl
#-------------------------------------------------------------------------------
TIMEOUT_SECS = 3
REQUEST = '''\
GET /index.html HTTP/1.0
'''
#-------------------------------------------------------------------------------
def print_suite_info(suite):
print("Suite:")
print("------")
if not options.use_properties:
print(suite)
else:
print("cipher_suite_name: %s" % (suite.cipher_suite_name))
print("cipher_suite: %#x" % (suite.cipher_suite))
print("auth_algorithm_name: %s" % (suite.auth_algorithm_name))
print("auth_algorithm: %#x" % (suite.auth_algorithm))
print("kea_type_name: %s" % (suite.kea_type_name))
print("kea_type: %#x" % (suite.kea_type))
print("symmetric_cipher_name: %s" % (suite.symmetric_cipher_name))
print("symmetric_cipher: %#x" % (suite.symmetric_cipher))
print("symmetric_key_bits: %s" % (suite.symmetric_key_bits))
print("symmetric_key_space: %s" % (suite.symmetric_key_space))
print("effective_key_bits: %s" % (suite.effective_key_bits))
print("mac_algorithm_name: %s" % (suite.mac_algorithm_name))
print("mac_algorithm: %#x" % (suite.mac_algorithm))
print("mac_bits: %s" % (suite.mac_bits))
print("is_fips: %s" % (suite.is_fips))
print("is_exportable: %s" % (suite.is_exportable))
print("is_nonstandard: %s" % (suite.is_nonstandard))
def print_channel_info(channel):
print("Channel:")
print("--------")
if not options.use_properties:
print(channel)
else:
print("protocol_version: %#x" % (channel.protocol_version))
print("protocol_version string: %s" % (channel.protocol_version_str))
print("protocol_version enum: %#x" % (channel.protocol_version_enum))
print("major_protocol_version: %s" % (channel.major_protocol_version))
print("minor_protocol_version: %s" % (channel.minor_protocol_version))
print("cipher_suite: %#x" % (channel.cipher_suite))
print("auth_key_bits: %d" % (channel.auth_key_bits))
print("kea_key_bits: %d" % (channel.kea_key_bits))
print("creation_time: %s" % (channel.creation_time))
print("last_access_time: %s" % (channel.last_access_time))
print("expiration_time: %s" % (channel.expiration_time))
print("creation_time_utc: %s" % (channel.creation_time_utc))
print("last_access_time_utc: %s" % (channel.last_access_time_utc))
print("expiration_time_utc: %s" % (channel.expiration_time_utc))
print("compression_method: %#x" % (channel.compression_method))
print("compression_method_name: %s" % (channel.compression_method_name))
print("session_id: %s" % (channel.session_id))
def handshake_callback(sock):
print("handshake complete, peer = %s, negotiated host = %s" %
(sock.get_peer_name(), sock.get_negotiated_host()))
print("Connection Info:")
print(sock.connection_info_str())
print()
channel = sock.get_ssl_channel_info()
print_channel_info(channel)
print()
suite = ssl.get_cipher_suite_info(channel.cipher_suite)
print_suite_info(suite)
def ssl_connect():
print("SSL connect to: %s" % options.hostname)
valid_addr = False
# Get the IP Address of our server
try:
addr_info = io.AddrInfo(options.hostname)
except:
print("ERROR: could not resolve hostname \"%s\"" % options.hostname)
return
for net_addr in addr_info:
net_addr.port = options.port
sock = ssl.SSLSocket(net_addr.family)
# Set client SSL socket options
sock.set_ssl_option(ssl.SSL_SECURITY, True)
sock.set_ssl_option(ssl.SSL_HANDSHAKE_AS_CLIENT, True)
sock.set_hostname(options.hostname)
try:
sock.set_ssl_version_range("tls1.0", "tls1.3")
except NSPRError as e:
print("Cannot enable TLS 1.3, {}".format(e))
# Provide a callback which notifies us when the SSL handshake is
# complete
sock.set_handshake_callback(handshake_callback)
try:
print("try connecting to: %s" % (net_addr))
sock.connect(net_addr, timeout=io.seconds_to_interval(TIMEOUT_SECS))
print("connected to: %s" % (net_addr))
valid_addr = True
break
except:
continue
if not valid_addr:
print("ERROR: could not connect to \"%s\"" % options.hostname)
return
try:
# Talk to the server
n_received = 0
sock.send(REQUEST.encode('utf-8'))
while True:
buf = sock.recv(1024)
n_received += len(buf)
if not buf:
break
except Exception as e:
print(e)
sock.shutdown()
return
sock.shutdown()
return
# -----------------------------------------------------------------------------
parser = argparse.ArgumentParser(
description='Example showing how to enumerate cipher suites and '
'get their properties as well as how to get SSL channel information '
'after connecting including the cipher suite in use',
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-d', '--db-name',
help='NSS database name (e.g. "sql:pki")')
parser.add_argument('-H', '--hostname',
help='host to connect to')
parser.add_argument('-p', '--port', type=int,
help='host port')
parser.add_argument('-E', '--no-enumerate-cipher-suites',
dest='enumerate_cipher_suites',
action='store_false',
help='do not enumerate cipher suites')
parser.add_argument('-S', '--no-ssl-connect',
dest='ssl_connect',
action='store_false',
help='do not perform SSL connection')
parser.add_argument('-P', '--use-properties',
dest='use_properties',
action='store_true',
help='print using object properties')
parser.set_defaults(db_name='sql:pki',
hostname='www.verisign.com',
port=443,
enumerate_cipher_suites=True,
ssl_connect=True,
use_properties=False)
options = parser.parse_args()
# Perform basic configuration and setup
try:
nss.nss_init(options.db_name)
ssl.set_domestic_policy()
except Exception as e:
print(str(e), file=sys.stderr)
sys.exit(1)
if options.enumerate_cipher_suites:
suite_info = ssl.get_cipher_suite_info(ssl.ssl_implemented_ciphers[0])
print("There are %d implemented ciphers" %
(len(ssl.ssl_implemented_ciphers)))
for cipher in ssl.ssl_implemented_ciphers:
suite_info = ssl.get_cipher_suite_info(cipher)
print(suite_info)
print()
if options.ssl_connect:
ssl_connect()
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