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import json
import logging
import uuid
import numpy as np
from model.sequence import Sequence
from .request_builder import build_request
from .runtime_dictionary import RuntimeDictionary
from .normal_test_data_generator import RandomDataGenerator
from utils.PayloadDataGenerator import PayloadDataGenerator
from .util import resolve_json_value
from model.reference_definition import ReferenceDefinition
import requests
import re
logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.INFO)
class NpEncoder(json.JSONEncoder):
def default(self, obj):
if isinstance(obj, np.integer):
return int(obj)
elif isinstance(obj, np.floating):
return float(obj)
elif isinstance(obj, np.ndarray):
return obj.tolist()
else:
return super(NpEncoder, self).default(obj)
class RequestBodyType:
JSON = "1"
TEXT = "2"
class ContentType:
XFORM = "1"
JSON = "2"
class VariableGetterType:
ALL = 1
KEY_VALUE = 2
JSON = 3
REG_EXPRESSION = 4
TEXT = 5
class mutationSequenceConverter:
def __init__(self, runtime_dictionary: RuntimeDictionary):
self.ref_prefix = "%{APIGen#"
self.ref_suffix = "}"
self.runtime_dictionary = runtime_dictionary
self.seq_to_check = "post get"
def get_date_time(self):
now = datetime.datetime.now()
date_time = now.strftime("%Y-%m-%d %H:%M:%S")
return date_time
def generate_random_parameter(self, index, method, sequence, ref_values):
values = []
ref_dict = sequence.ref_vars.get(index, ReferenceDefinition([]))
for param_name in method.request_parameters:
parameter = method.request_parameters[param_name]
generator = RandomDataGenerator(parameter, self.runtime_dictionary, ref_dict, ref_values, method)
generated_value = generator.generate()
values.append((parameter, generated_value))
url, params, data, headers, files, form_data = build_request(method, values)
return url, params, data, headers, files, form_data
def generate_mutation_parameter(self, index, method, sequence, ref_values):
values = []
ref_dict = sequence.ref_vars.get(index, ReferenceDefinition([]))
for param_name in method.request_parameters:
parameter = method.request_parameters[param_name]
generator = PayloadDataGenerator(parameter, self.runtime_dictionary, ref_dict, ref_values)
generated_value = generator.generate()
values.append((parameter, generated_value))
url, params, data, headers, files, form_data = build_request(method, values)
return url, params, data, headers, files, form_data
def extract_value(self, response):
status_code = response["statusCode"]
resolved_value = {}
if status_code < 200 or status_code > 300:
return resolved_value
content = response["content"]
if content is None or len(content) == 0:
return resolved_value
content = json.loads(content)
resolve_json_value("", content, resolved_value)
return resolved_value
def check_header_validity(self, header):
"""Verifies that header value is a string which doesn't contain
leading whitespace or return characters. This prevents unintended
header injection.
:param header: tuple, in the format (name, value).
"""
name, value = header
# Moved outside of function to avoid recompile every call
_CLEAN_HEADER_REGEX_BYTE = re.compile(b'^\\S[^\\r\\n]*$|^$')
_CLEAN_HEADER_REGEX_STR = re.compile(r'^\S[^\r\n]*$|^$')
if isinstance(value, bytes):
pat = _CLEAN_HEADER_REGEX_BYTE
else:
pat = _CLEAN_HEADER_REGEX_STR
try:
if not pat.match(value):
raise Exception("Invalid return character or leading space in header: %s" % name)
except TypeError:
raise Exception("Value for header {%s: %s} must be of type str or "
"bytes, not %s" % (name, value, type(value)))
def do_request(self, session, url, method, params, data, headers, files, form_data, pre_defined_headers):
response = {
"content": "",
"apiName": method.method_name,
"request": {
"url": url, "method": method.method_type, "params": params, "data": data, "headers": headers,
"files": files
}
}
executed_method = getattr(session, method.method_type)
try:
for ind, key in enumerate(headers):
self.check_header_validity((key, headers[key]))
except Exception as ex:
print(ex)
headers = {}
# add pre defined headers
for k in pre_defined_headers.keys():
headers[k] = pre_defined_headers[k]
# do request
try:
raw_response = executed_method(url, params=params, data=form_data, json=data, headers=headers, files=files, allow_redirects=False, timeout=3)
except requests.exceptions.ReadTimeout as err:
print(err)
response["statusCode"] = 524
response["content"] = "Timeout Error"
response["resolved_value"] = "None"
except Exception as e: # probably an encoding error
return None
else:
response["statusCode"] = raw_response.status_code
response["content"] = raw_response.text
try:
resolved_value = self.extract_value(response)
except: # returned value format not correct
resolved_value = {}
response["resolved_value"] = resolved_value
return response
def execute_request(self, fuzzer, session, method, url, params, data, headers, files, form_data,
pre_defined_headers):
request_url = fuzzer.server_address + url
result = self.do_request(session, request_url, method, params, data, headers, files, form_data,
pre_defined_headers)
return result
def execute_sequence(self, fuzzer, sequence: Sequence, mutation_index):
result = []
session = requests.session()
last_call_response = {}
for i, method in enumerate(sequence.requests):
if mutation_index == i:
url, params, data, headers, files, form_data = self.generate_mutation_parameter(i, method,
sequence,
last_call_response)
else:
url, params, data, headers, files, form_data = self.generate_random_parameter(i, method,
sequence, last_call_response)
resp = self.execute_request(fuzzer, session, method, url, params, data, headers, files, form_data,
fuzzer.pre_defined_headers)
result.append(resp)
last_call_response = resp["resolved_value"]
return result
def enumerate_sequence(self, fuzzer, sequence: Sequence, mutation_index):
'''
The general idea of this function is to enumerate through all the possible fuzz-strings, instead of the random
generation approach used in the previous methods.
'''
result = []
session = requests.session()
last_call_response = {}
for i, method in enumerate(sequence.requests):
if mutation_index == i:
url, params, data, headers, files, form_data = self.generate_mutation_parameter(i, method,
sequence,
last_call_response)
else:
url, params, data, headers, files, form_data = self.generate_random_parameter(i, method,
sequence,
last_call_response)
resp = self.execute_request(fuzzer, session, method, url, params, data, headers, files, form_data,
fuzzer.pre_defined_headers)
result.append(resp)
last_call_response = resp["resolved_value"]
return result |