import string
import random
import hashlib
from exercises.registry import register_generator
def password_generator(length=6):
'''
Create a random string of lowercase letters.
'''
return 'the_password_is_' + ''.join(random.SystemRandom().choice(string.ascii_lowercase) for _ in range(length))
class HashExercise(object):
'''
SHA256 encoding class for the hands-on exercise of lesson 6 of crypto-class.
'''
def __init__(self, arg_dict=None):
self.metadata = {}
self.metadata['password'] = password_generator()
self.encode()
def encode(self):
self.metadata['message'] = self.message = hashlib.sha256(self.metadata['password'].encode('utf8')).hexdigest()
register_generator('6.0', HashExercise)
from exercises.registry import register_generator
class OnionExercise(object):
'''
Hands-on exercise for creating an onion address
'''
def __init__(self, args_dict=None):
if 'user' not in args_dict:
print 'User is required for OnionExercise initialization'
exit(1)
user = args_dict['user']
if not user.is_authenticated():
self.message = '*****@*****.**'
self.metadata = {}
return
# user is authenticated
self.metadata = {'user_email': user.email}
self.message = user.email
register_generator('20.0', OnionExercise)
from django.conf import settings
from exercises.registry import register_generator
from .models import HttpsPassword
import random
class HttpsExercise(object):
'''
Hands-on exercise for HTTPS traffic decryption
'''
def __init__(self, args_dict=None):
exercise_packet = random.choice(HttpsPassword.objects.all())
self.metadata = {'password': exercise_packet.password}
self.message = '<a href="%s">Download file</a>' % (
settings.MEDIA_URL + exercise_packet.filename)
register_generator('18.0', HttpsExercise)
self.metadata = {}
quote = random.choice(SubstitutionQuote.objects.all()).quote
random_lst = list(string.ascii_uppercase)
random.shuffle(random_lst)
self.metadata['permutation'] = ''.join(random_lst)
self.metadata['password'] = password_generator()
self.metadata['cleartext'] = quote.upper() + '\nPassword '.upper() + self.metadata['password']
self.encode('e')
def encode(self, mode):
out = ''
inp = self.metadata['cleartext'] if mode == 'e' else self.message
for pos, ch in enumerate(inp):
if ch not in string.uppercase:
out += ch
else:
if mode == 'e':
offset = ord(ch) - ord('A')
out += self.metadata['permutation'][offset]
else:
offset = self.metadata['permutation'].find(ch)
out += string.ascii_uppercase[offset]
if mode == 'e':
self.metadata['message'] = self.message = out
else:
self.cleartext = out
register_generator('1.1', Base64Exercise)
register_generator('1.2', Rot13Exercise)
register_generator('1.3', SubstitutionExercise)
random_lst = list(string.ascii_uppercase)
random.shuffle(random_lst)
self.metadata['permutation'] = ''.join(random_lst)
self.metadata['password'] = password_generator()
self.metadata['cleartext'] = quote.upper() + '\nPassword '.upper(
) + self.metadata['password']
self.encode('e')
def encode(self, mode):
out = ''
inp = self.metadata['cleartext'] if mode == 'e' else self.message
for pos, ch in enumerate(inp):
if ch not in string.uppercase:
out += ch
else:
if mode == 'e':
offset = ord(ch) - ord('A')
out += self.metadata['permutation'][offset]
else:
offset = self.metadata['permutation'].find(ch)
out += string.ascii_uppercase[offset]
if mode == 'e':
self.metadata['message'] = self.message = out
else:
self.cleartext = out
register_generator('1.1', Base64Exercise)
register_generator('1.2', Rot13Exercise)
register_generator('1.3', SubstitutionExercise)
import random
from .models import RSAValues
from exercises.registry import register_generator
class RSAWienerExercise(object):
def __init__(self, args_dict=None):
if len(args_dict) == 1:
args_dict = {}
try:
if 'metadata' in args_dict:
self.metadata = args_dict['metadata']
self.message = self.metadata['message']
else:
self.metadata = { }
rsa_value = random.choice(RSAValues.objects.all())
message = 'n:\n' + rsa_value.n + '\n\ne:\n' + rsa_value.e
self.metadata['message'] = self.message = message
self.metadata['private-key'] = rsa_value.d
except Exception, e:
print e.message
exit(1)
register_generator('14.0', RSAWienerExercise)
from exercises.registry import register_generator
class OnionExercise(object):
'''
Hands-on exercise for creating an onion address
'''
def __init__(self, args_dict=None):
if 'user' not in args_dict:
print 'User is required for OnionExercise initialization'
exit(1)
user = args_dict['user']
if not user.is_authenticated():
self.message = '*****@*****.**'
self.metadata = { }
return
# user is authenticated
self.metadata = {
'user_email': user.email
}
self.message = user.email
register_generator('20.0', OnionExercise)
from exercises.registry import register_generator
class PGPExercise(object):
'''
Hands-on exercise for PGP signing a file
'''
def __init__(self, args_dict=None):
if 'user' not in args_dict:
print 'User is required for PGP exercise initialization'
exit(1)
user = args_dict['user']
if not user.is_authenticated():
self.message = '*****@*****.**'
self.metadata = { }
return
# user is authenticated
self.metadata = {
'user_email': user.email
}
self.message = user.email
register_generator('20.1', PGPExercise)
import random
from .models import RSAValues
from exercises.registry import register_generator
class RSAWienerExercise(object):
def __init__(self, args_dict=None):
if len(args_dict) == 1:
args_dict = {}
try:
if 'metadata' in args_dict:
self.metadata = args_dict['metadata']
self.message = self.metadata['message']
else:
self.metadata = {}
rsa_value = random.choice(RSAValues.objects.all())
message = 'n:\n' + rsa_value.n + '\n\ne:\n' + rsa_value.e
self.metadata['message'] = self.message = message
self.metadata['private-key'] = rsa_value.d
except Exception, e:
print e.message
exit(1)
register_generator('14.0', RSAWienerExercise)
from django.conf import settings
from exercises.registry import register_generator
from .models import HttpsPassword
import random
class HttpsExercise(object):
'''
Hands-on exercise for HTTPS traffic decryption
'''
def __init__(self, args_dict=None):
exercise_packet = random.choice(HttpsPassword.objects.all())
self.metadata = {
'password': exercise_packet.password
}
self.message = '<a href="%s">Download file</a>' % (settings.MEDIA_URL + exercise_packet.filename)
register_generator('18.0', HttpsExercise)