├── core ├── __init__.py ├── config.py ├── prompt.py ├── colors.py ├── requester.py └── utils.py ├── CHANGELOG.md ├── README.md ├── arjun.py └── LICENSE /core/__init__.py: -------------------------------------------------------------------------------- 1 | 2 | -------------------------------------------------------------------------------- /core/config.py: -------------------------------------------------------------------------------- 1 | globalVariables = {} 2 | -------------------------------------------------------------------------------- /core/prompt.py: -------------------------------------------------------------------------------- 1 | import os 2 | import tempfile 3 | 4 | def prompt(default=None): 5 | editor = 'nano' 6 | with tempfile.NamedTemporaryFile(mode='r+') as tmpfile: 7 | if default: 8 | tmpfile.write(default) 9 | tmpfile.flush() 10 | 11 | child_pid = os.fork() 12 | is_child = child_pid == 0 13 | 14 | if is_child: 15 | os.execvp(editor, [editor, tmpfile.name]) 16 | else: 17 | os.waitpid(child_pid, 0) 18 | tmpfile.seek(0) 19 | return tmpfile.read().strip() -------------------------------------------------------------------------------- /core/colors.py: -------------------------------------------------------------------------------- 1 | import sys 2 | 3 | colors = True # Output should be colored 4 | machine = sys.platform # Detecting the os of current system 5 | if machine.lower().startswith(('os', 'win', 'darwin', 'ios')): 6 | colors = False # Colors shouldn't be displayed in mac & windows 7 | if not colors: 8 | end = red = white = green = yellow = run = bad = good = info = que = '' 9 | else: 10 | white = '\033[97m' 11 | green = '\033[92m' 12 | red = '\033[91m' 13 | yellow = '\033[93m' 14 | end = '\033[0m' 15 | back = '\033[7;91m' 16 | info = '\033[93m[!]\033[0m' 17 | que = '\033[94m[?]\033[0m' 18 | bad = '\033[91m[-]\033[0m' 19 | good = '\033[92m[+]\033[0m' 20 | run = '\033[97m[~]\033[0m' 21 | -------------------------------------------------------------------------------- /core/requester.py: -------------------------------------------------------------------------------- 1 | import re 2 | import json 3 | import time 4 | import random 5 | import warnings 6 | import requests 7 | 8 | import core.config 9 | 10 | warnings.filterwarnings('ignore') # Disable SSL related warnings 11 | 12 | def requester(url, data, headers, GET, delay): 13 | if core.config.globalVariables['jsonData']: 14 | data = json.dumps(data) 15 | if core.config.globalVariables['stable']: 16 | delay = random.choice(range(6, 12)) 17 | time.sleep(delay) 18 | headers['Host'] = re.search(r'https?://([^/]+)', url).group(1) 19 | if GET: 20 | response = requests.get(url, params=data, headers=headers, verify=False) 21 | elif core.config.globalVariables['jsonData']: 22 | response = requests.post(url, json=data, headers=headers, verify=False) 23 | else: 24 | response = requests.post(url, data=data, headers=headers, verify=False) 25 | return response 26 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | #### 1.6 2 | - `--stable` switch for handling rate limits 3 | - Include empty JS variables for testing 4 | - Various optimizations and bug fixes 5 | - Handle keyboard interruption 6 | - Removed redundant code 7 | 8 | #### 1.5 9 | - Ignore dynamic content 10 | - Detect int-only parameters 11 | - Include URL in json output 12 | - Track each reflection separately 13 | - Improved error handling 14 | 15 | #### 1.4 16 | - Added `JSON` support 17 | - Fixed a major bug in detection logic 18 | - `-o` option to save result to a file 19 | - `--urls` option to scan list of URLs 20 | - Ability to supply HTTP headers from CLI 21 | 22 | #### 1.3 23 | - improved logic 24 | - detection by plain-text content matching 25 | - `--include` switch to include persistent data 26 | - fixed a bug that caused user supplied HTTP headers to have no effect 27 | 28 | #### 1.2-beta 29 | - Drastic performance improvement (x50 faster) 30 | 31 | #### 1.1 32 | Initial stable release 33 | -------------------------------------------------------------------------------- /core/utils.py: -------------------------------------------------------------------------------- 1 | import re 2 | import json 3 | import random 4 | import requests 5 | 6 | from core.colors import bad 7 | 8 | def extractHeaders(headers): 9 | headers = headers.replace('\\n', '\n') 10 | sorted_headers = {} 11 | matches = re.findall(r'(.*):\s(.*)', headers) 12 | for match in matches: 13 | header = match[0] 14 | value = match[1] 15 | try: 16 | if value[-1] == ',': 17 | value = value[:-1] 18 | sorted_headers[header] = value 19 | except IndexError: 20 | pass 21 | return sorted_headers 22 | 23 | def unityExtracter(arrayOfArrays, usable): 24 | "extracts the value from single valued list from a list of lists" 25 | remainingArray = [] 26 | for array in arrayOfArrays: 27 | if len(array) == 1: 28 | usable.append(array[0]) 29 | else: 30 | remainingArray.append(array) 31 | return remainingArray 32 | 33 | def slicer(array, n=2): 34 | "divides a list into n parts" 35 | k, m = divmod(len(array), n) 36 | return list(array[i * k + min(i, m):(i + 1) * k + min(i + 1, m)] for i in range(n)) 37 | 38 | def joiner(array, include): 39 | "converts a list of parameters into parameter and value pair" 40 | params = {} 41 | for element in array: 42 | params[element] = randomString(6) 43 | params.update(include) 44 | return params 45 | 46 | def stabilize(url): 47 | "picks up the best suiting protocol if not present already" 48 | if 'http' not in url: 49 | try: 50 | requests.get('http://%s' % url) # Makes request to the target with http schema 51 | url = 'http://%s' % url 52 | except: # if it fails, maybe the target uses https schema 53 | url = 'https://%s' % url 54 | 55 | try: 56 | requests.get(url) # Makes request to the target 57 | except Exception as e: # if it fails, the target is unreachable 58 | if 'ssl' in str(e).lower(): 59 | pass 60 | else: 61 | print ('%s Unable to connect to the target.' % bad) 62 | return False 63 | return url 64 | 65 | def removeTags(html): 66 | "removes all the html from a webpage source" 67 | return re.sub(r'(?s)<.*?>', '', html) 68 | 69 | def lineComparer(response1, response2): 70 | "compares two webpage and finds the non-matching lines" 71 | response1 = response1.split('\n') 72 | response2 = response2.split('\n') 73 | num = 0 74 | dynamicLines = [] 75 | for line1, line2 in zip(response1, response2): 76 | if line1 != line2: 77 | dynamicLines.append(num) 78 | num += 1 79 | return dynamicLines 80 | 81 | def randomString(n): 82 | "generates a random string of length n" 83 | return ''.join(str(random.choice(range(10))) for i in range(n)) 84 | 85 | def e(string): 86 | "utf encodes a string" 87 | return string.encode('utf-8') 88 | 89 | def d(string): 90 | "utf decodes a string" 91 | return string.decode('utf-8') 92 | 93 | def getParams(data): 94 | params = {} 95 | try: 96 | params = json.loads(str(data).replace('\'', '"')) 97 | return params 98 | except json.decoder.JSONDecodeError: 99 | if data.startswith('?'): 100 | data = data[1:] 101 | parts = data.split('&') 102 | for part in parts: 103 | each = part.split('=') 104 | try: 105 | params[each[0]] = each[1] 106 | except IndexError: 107 | params = None 108 | return params 109 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | 2 |

3 |
4 | Arjun 5 |
6 | Arjun 7 |
8 |

9 | 10 |

HTTP Parameter Discovery Suite

11 | 12 |

13 | 14 | 15 | 16 | 17 | 18 | 19 |

20 | 21 | ![demo](https://i.ibb.co/Ln32F4B/arjun-demo.png) 22 | 23 | ### The Improvment 24 | 25 | Wonder what's modified in this Arjun version? 26 | 27 | Simple, nowdays many platforms uses Javascript for their frontends, and usually they stores those interesting parameters in Javascript Arrays. 28 | 29 | This Arjun version grabs variable names from strings like {"name":"value"}. Lately I got MANY injections from GET/POST/Cookies scraping those, and later escaping with . 30 | This happened me in many programs including big ones like PayPal, Yahoo, etc and this little trick helped me a lot. 31 | When you are fuzzing a no response page go dictionary fuzzing, but if its a responding website this heuristic technique usually is faster and better. 32 | 33 | 34 | ### Introduction 35 | Web applications use parameters (or queries) to accept user input, take the following example into consideration 36 | 37 | `http://api.example.com/v1/userinfo?id=751634589` 38 | 39 | This URL seems to load user information for a specific user id, but what if there exists a parameter named `admin` which when set to `True` makes the endpoint provide more information about the user?\ 40 | This is what Arjun does, it finds valid HTTP parameters with a huge default dictionary of 25,980 parameter names. 41 | 42 | The best part? It takes less than 30 seconds to go through this huge list while making just 50-60 requests to the target.\ 43 | Want to know how Arjun does that? [Here's how](https://github.com/s0md3v/Arjun/wiki/How-Arjun-works%3F). 44 | 45 | ### Donations 46 | You can encourage me to contribute more to the open source with donations. 47 | 48 | - Paypal - [https://paypal.me/s0md3v](https://paypal.me/s0md3v) 49 | - Credit/Debit Card - [https://www.buymeacoffee.com/s0md3v](https://www.buymeacoffee.com/s0md3v) 50 | 51 | Do you want to sponsor Arjun and get mentioned here? Email me `s0md3v[at]gmail[dot]com` 52 | 53 | ### Features 54 | - Multi-threading 55 | - Thorough detection 56 | - Automatic rate limit handling 57 | - A typical scan takes 30 seconds 58 | - `GET/POST/JSON` methods supported 59 | - Huge list of 25,980 parameter names 60 | 61 | > **Note:** Arjun doesn't work with python < 3.4 62 | 63 | #### How to use Arjun? 64 | 65 | A detailed usage guide is available on [Usage](https://github.com/s0md3v/Arjun/wiki/Usage) section of the Wiki.\ 66 | 67 | An index of options is given below: 68 | 69 | - [Scanning a single URL](https://github.com/s0md3v/Arjun/wiki/Usage#scanning-a-single-url) 70 | - [Scanning multiple URLs](https://github.com/s0md3v/Arjun/wiki/Usage#scanning-multiple-urls) 71 | - [Choosing number of threads](https://github.com/s0md3v/Arjun/wiki/Usage#multi-threading) 72 | - [Handling rate limits](https://github.com/s0md3v/Arjun/wiki/Usage#handling-rate-limits) 73 | - [Delay between requests](https://github.com/s0md3v/Arjun/wiki/Usage#delay-between-requests) 74 | - [Including presistent data](https://github.com/s0md3v/Arjun/wiki/Usage#including-persistent-data) 75 | - [Saving output to a file](https://github.com/s0md3v/Arjun/wiki/Usage#saving-output-to-a-file) 76 | - [Adding custom HTTP headers](https://github.com/s0md3v/Arjun/wiki/Usage#adding-http-headers) 77 | 78 | ##### Credits 79 | The parameter names are taken from [@SecLists](https://github.com/danielmiessler/SecLists). 80 | -------------------------------------------------------------------------------- /arjun.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from __future__ import print_function 4 | 5 | from core.colors import green, white, end, info, bad, good, run 6 | 7 | print('''%s _ 8 | /_| _ ' 9 | ( |/ /(//) v1.6 10 | _/ %s 11 | ''' % (green, end)) 12 | 13 | try: 14 | import concurrent.futures 15 | except ImportError: 16 | print('%s Please use Python > 3.2 to run Arjun.' % bad) 17 | quit() 18 | 19 | import re 20 | import json 21 | import time 22 | import argparse 23 | 24 | import core.config 25 | from core.prompt import prompt 26 | from core.requester import requester 27 | from core.utils import e, d, stabilize, randomString, slicer, joiner, unityExtracter, getParams, removeTags, extractHeaders 28 | 29 | parser = argparse.ArgumentParser() # defines the parser 30 | # Arguments that can be supplied 31 | parser.add_argument('-u', help='target url', dest='url') 32 | parser.add_argument('-o', help='path for the output file', dest='output_file') 33 | parser.add_argument('-d', help='request delay', dest='delay', type=float, default=0) 34 | parser.add_argument('-t', help='number of threads', dest='threads', type=int, default=2) 35 | parser.add_argument('-f', help='wordlist path', dest='wordlist', default='./db/params.txt') 36 | parser.add_argument('--urls', help='file containing target urls', dest='url_file') 37 | parser.add_argument('--get', help='use get method', dest='GET', action='store_true') 38 | parser.add_argument('--post', help='use post method', dest='POST', action='store_true') 39 | parser.add_argument('--headers', help='add headers', dest='headers', nargs='?', const=True) 40 | parser.add_argument('--json', help='treat post data as json', dest='jsonData', action='store_true') 41 | parser.add_argument('--stable', help='prefer stability over speed', dest='stable', action='store_true') 42 | parser.add_argument('--include', help='include this data in every request', dest='include', default={}) 43 | args = parser.parse_args() # arguments to be parsed 44 | 45 | url = args.url 46 | delay = args.delay 47 | stable = args.stable 48 | include = args.include 49 | headers = args.headers 50 | jsonData = args.jsonData 51 | url_file = args.url_file 52 | wordlist = args.wordlist 53 | threadCount = args.threads 54 | 55 | if stable or delay: 56 | threadCount = 1 57 | 58 | core.config.globalVariables = vars(args) 59 | 60 | if type(headers) == bool: 61 | headers = extractHeaders(prompt()) 62 | elif type(headers) == str: 63 | headers = extractHeaders(headers) 64 | else: 65 | headers = {'User-Agent' : 'Mozilla/5.0 (X11; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0', 66 | 'Accept' : 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 67 | 'Accept-Language' : 'en-US,en;q=0.5', 68 | 'Accept-Encoding' : 'gzip, deflate', 69 | 'Connection' : 'keep-alive', 70 | 'Upgrade-Insecure-Requests' : '1'} 71 | 72 | if jsonData: 73 | headers['Content-type'] = 'application/json' 74 | 75 | if not (args.GET or args.POST or args.jsonData) or args.GET: 76 | GET = True 77 | else: 78 | GET = False 79 | 80 | include = getParams(include) 81 | 82 | paramList = [] 83 | try: 84 | with open(wordlist, 'r', encoding="utf8") as file: 85 | for line in file: 86 | paramList.append(line.strip('\n')) 87 | except FileNotFoundError: 88 | print('%s The specified file for parameters doesn\'t exist' % bad) 89 | quit() 90 | 91 | urls = [] 92 | 93 | if url_file: 94 | try: 95 | with open(url_file, 'r', encoding="utf8") as file: 96 | for line in file: 97 | urls.append(line.strip('\n')) 98 | except FileNotFoundError: 99 | print('%s The specified file for URLs doesn\'t exist' % bad) 100 | quit() 101 | 102 | if not url and not url_file: 103 | print('%s No URL specified.' % bad) 104 | quit() 105 | 106 | def heuristic(response, paramList): 107 | done = [] 108 | forms = re.findall(r'(?i)(?s)', response) 109 | for form in forms: 110 | method = re.search(r'(?i)method=[\'"](.*?)[\'"]', form) 111 | inputs = re.findall(r'(?i)(?s)', response) 112 | if inputs != None and method != None: 113 | for inp in inputs: 114 | inpName = re.search(r'(?i)name=[\'"](.*?)[\'"]', inp) 115 | if inpName: 116 | inpName = d(e(inpName.group(1))) 117 | if inpName not in done: 118 | if inpName in paramList: 119 | paramList.remove(inpName) 120 | done.append(inpName) 121 | paramList.insert(0, inpName) 122 | print('%s Heuristic found a potential %s parameter: %s%s%s' % (good, method.group(1), green, inpName, end)) 123 | print('%s Prioritizing it' % info) 124 | emptyJSvars = re.finditer(r'var\s+([^=]+)\s*=\s*[\'"`][\'"`]', response) 125 | for each in emptyJSvars: 126 | inpName = each.group(1) 127 | done.append(inpName) 128 | paramList.insert(0, inpName) 129 | print('%s Heuristic found a potential parameter: %s%s%s' % (good, green, inpName, end)) 130 | print('%s Prioritizing it' % info) 131 | 132 | arrayJSnames = re.finditer(r'([^"]+)":"', response) 133 | for each in arrayJSnames: 134 | inpName = each.group(1) 135 | if inpName not in done: 136 | done.append(inpName) 137 | paramList.insert(0, inpName) 138 | print('%s Heuristic found a potential parameter: %s%s%s' % (good, green, inpName, end)) 139 | print('%s Prioritizing it' % info) 140 | 141 | 142 | 143 | def quickBruter(params, originalResponse, originalCode, reflections, factors, include, delay, headers, url, GET): 144 | joined = joiner(params, include) 145 | newResponse = requester(url, joined, headers, GET, delay) 146 | if newResponse.status_code == 429: 147 | if core.config.globalVariables['stable']: 148 | print('%s Hit rate limit, stabilizing the connection..') 149 | time.sleep(30) 150 | return params 151 | else: 152 | print('%s Target has rate limiting in place, please use --stable switch' % bad) 153 | raise ConnectionError 154 | if newResponse.status_code != originalCode: 155 | return params 156 | elif factors['sameHTML'] and len(newResponse.text) != (len(originalResponse)): 157 | return params 158 | elif factors['samePlainText'] and len(removeTags(originalResponse)) != len(removeTags(newResponse.text)): 159 | return params 160 | elif True: 161 | for param, value in joined.items(): 162 | if param not in include and newResponse.text.count(value) != reflections: 163 | return params 164 | else: 165 | return False 166 | 167 | def narrower(oldParamList, url, include, headers, GET, delay, originalResponse, originalCode, reflections, factors, threadCount): 168 | newParamList = [] 169 | threadpool = concurrent.futures.ThreadPoolExecutor(max_workers=threadCount) 170 | futures = (threadpool.submit(quickBruter, part, originalResponse, originalCode, reflections, factors, include, delay, headers, url, GET) for part in oldParamList) 171 | for i, result in enumerate(concurrent.futures.as_completed(futures)): 172 | if result.result(): 173 | newParamList.extend(slicer(result.result())) 174 | print('%s Processing: %i/%-6i' % (info, i + 1, len(oldParamList)), end='\r') 175 | return newParamList 176 | 177 | def initialize(url, include, headers, GET, delay, paramList, threadCount): 178 | url = stabilize(url) 179 | if not url: 180 | return {} 181 | else: 182 | print('%s Analysing the content of the webpage' % run) 183 | firstResponse = requester(url, include, headers, GET, delay) 184 | 185 | print('%s Analysing behaviour for a non-existent parameter' % run) 186 | 187 | originalFuzz = randomString(6) 188 | data = {originalFuzz : originalFuzz[::-1]} 189 | data.update(include) 190 | response = requester(url, data, headers, GET, delay) 191 | reflections = response.text.count(originalFuzz[::-1]) 192 | print('%s Reflections: %s%i%s' % (info, green, reflections, end)) 193 | 194 | originalResponse = response.text 195 | originalCode = response.status_code 196 | print('%s Response Code: %s%i%s' % (info, green, originalCode, end)) 197 | 198 | newLength = len(response.text) 199 | plainText = removeTags(originalResponse) 200 | plainTextLength = len(plainText) 201 | print('%s Content Length: %s%i%s' % (info, green, newLength, end)) 202 | print('%s Plain-text Length: %s%i%s' % (info, green, plainTextLength, end)) 203 | 204 | factors = {'sameHTML': False, 'samePlainText': False} 205 | if len(firstResponse.text) == len(originalResponse): 206 | factors['sameHTML'] = True 207 | elif len(removeTags(firstResponse.text)) == len(plainText): 208 | factors['samePlainText'] = True 209 | 210 | print('%s Parsing webpage for potential parameters' % run) 211 | heuristic(firstResponse.text, paramList) 212 | 213 | fuzz = randomString(8) 214 | data = {fuzz : fuzz[::-1]} 215 | data.update(include) 216 | 217 | print('%s Performing heuristic level checks' % run) 218 | 219 | toBeChecked = slicer(paramList, 50) 220 | foundParamsTemp = [] 221 | while True: 222 | toBeChecked = narrower(toBeChecked, url, include, headers, GET, delay, originalResponse, originalCode, reflections, factors, threadCount) 223 | toBeChecked = unityExtracter(toBeChecked, foundParamsTemp) 224 | if not toBeChecked: 225 | break 226 | 227 | foundParams = [] 228 | 229 | for param in foundParamsTemp: 230 | exists = quickBruter([param], originalResponse, originalCode, reflections, factors, include, delay, headers, url, GET) 231 | if exists: 232 | foundParams.append(param) 233 | 234 | print('%s Scan Completed ' % info) 235 | 236 | for each in foundParams: 237 | print('%s Valid parameter found: %s%s%s' % (good, green, each, end)) 238 | if not foundParams: 239 | print('%s Unable to verify existence of parameters detected by heuristic.' % bad) 240 | return foundParams 241 | 242 | finalResult = {} 243 | 244 | try: 245 | if url: 246 | finalResult[url] = [] 247 | try: 248 | finalResult[url] = initialize(url, include, headers, GET, delay, paramList, threadCount) 249 | except ConnectionError: 250 | print('%s Target has rate limiting in place, please use --stable switch.' % bad) 251 | quit() 252 | elif urls: 253 | for url in urls: 254 | finalResult[url] = [] 255 | print('%s Scanning: %s' % (run, url)) 256 | try: 257 | finalResult[url] = initialize(url, include, headers, GET, delay, list(paramList), threadCount) 258 | if finalResult[url]: 259 | print('%s Parameters found: %s' % (good, ', '.join(finalResult[url]))) 260 | except ConnectionError: 261 | print('%s Target has rate limiting in place, please use --stable switch.' % bad) 262 | pass 263 | except KeyboardInterrupt: 264 | print('%s Exiting.. ' % bad) 265 | quit() 266 | 267 | # Finally, export to json 268 | if args.output_file and finalResult: 269 | print('%s Saving output to JSON file in %s' % (info, args.output_file)) 270 | with open(str(args.output_file), 'w+', encoding="utf8") as json_output: 271 | json.dump(finalResult, json_output, sort_keys=True, indent=4) 272 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2018 Somdev Sangwan, 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------