__filename__ = "city.py" __author__ = "Bob Mottram" __license__ = "AGPL3+" __version__ = "1.2.0" __maintainer__ = "Bob Mottram" __email__ = "bob@freedombone.net" __status__ = "Production" __module_group__ = "Metadata" import os import datetime import random import math from random import randint # states which the simulated city dweller can be in PERSON_SLEEP = 0 PERSON_WORK = 1 PERSON_PLAY = 2 PERSON_SHOP = 3 PERSON_EVENING = 4 PERSON_PARTY = 5 def _getDecoyCamera(decoySeed: int) -> (str, str, int): """Returns a decoy camera make and model which took the photo """ cameras = [ ["Apple", "iPhone SE"], ["Apple", "iPhone XR"], ["Apple", "iPhone 6"], ["Apple", "iPhone 7"], ["Apple", "iPhone 8"], ["Apple", "iPhone 11"], ["Apple", "iPhone 11 Pro"], ["Apple", "iPhone 12"], ["Apple", "iPhone 12 Mini"], ["Apple", "iPhone 12 Pro Max"], ["Samsung", "Galaxy Note 20 Ultra"], ["Samsung", "Galaxy S20 Plus"], ["Samsung", "Galaxy S20 FE 5G"], ["Samsung", "Galaxy Z FOLD 2"], ["Samsung", "Galaxy S10 Plus"], ["Samsung", "Galaxy S10e"], ["Samsung", "Galaxy Z Flip"], ["Samsung", "Galaxy A51"], ["Samsung", "Galaxy S10"], ["Samsung", "Galaxy S10 Plus"], ["Samsung", "Galaxy S10e"], ["Samsung", "Galaxy S10 5G"], ["Samsung", "Galaxy A60"], ["Samsung", "Note 10"], ["Samsung", "Note 10 Plus"], ["Samsung", "Galaxy S21 Ultra"], ["Samsung", "Galaxy Note 20 Ultra"], ["Samsung", "Galaxy S21"], ["Samsung", "Galaxy S21 Plus"], ["Samsung", "Galaxy S20 FE"], ["Samsung", "Galaxy Z Fold 2"], ["Samsung", "Galaxy A52 5G"], ["Samsung", "Galaxy A71 5G"], ["Google", "Pixel 5"], ["Google", "Pixel 4a"], ["Google", "Pixel 4 XL"], ["Google", "Pixel 3 XL"], ["Google", "Pixel 4"], ["Google", "Pixel 4a 5G"], ["Google", "Pixel 3"], ["Google", "Pixel 3a"] ] randgen = random.Random(decoySeed) index = randgen.randint(0, len(cameras) - 1) serialNumber = randgen.randint(100000000000, 999999999999999999999999) return cameras[index][0], cameras[index][1], serialNumber def _getCityPulse(currTimeOfDay, decoySeed: int) -> (float, float): """This simulates expected average patterns of movement in a city. Jane or Joe average lives and works in the city, commuting in and out of the central district for work. They have a unique life pattern, which machine learning can latch onto. This returns a polar coordinate for the simulated city dweller: Distance from the city centre is in the range 0.0 - 1.0 Angle is in radians """ randgen = random.Random(decoySeed) variance = 3 busyStates = (PERSON_WORK, PERSON_SHOP, PERSON_PLAY, PERSON_PARTY) dataDecoyState = PERSON_SLEEP weekday = currTimeOfDay.weekday() minHour = 7 + randint(0, variance) maxHour = 17 + randint(0, variance) if currTimeOfDay.hour > minHour: if currTimeOfDay.hour <= maxHour: if weekday < 5: dataDecoyState = PERSON_WORK elif weekday == 5: dataDecoyState = PERSON_SHOP else: dataDecoyState = PERSON_PLAY else: if weekday < 5: dataDecoyState = PERSON_EVENING else: dataDecoyState = PERSON_PARTY randgen2 = random.Random(decoySeed + dataDecoyState) angleRadians = \ (randgen2.randint(0, 100000) / 100000) * 2 * math.pi # some people are quite random, others have more predictable habits decoyRandomness = randgen.randint(1, 3) # occasionally throw in a wildcard to keep the machine learning guessing if randint(0, 100) < decoyRandomness: distanceFromCityCenter = (randint(0, 100000) / 100000) angleRadians = (randint(0, 100000) / 100000) * 2 * math.pi else: # what consitutes the central district is fuzzy centralDistrictFuzz = (randgen.randint(0, 100000) / 100000) * 0.1 busyRadius = 0.3 + centralDistrictFuzz if dataDecoyState in busyStates: # if we are busy then we're somewhere in the city center distanceFromCityCenter = \ (randgen.randint(0, 100000) / 100000) * busyRadius else: # otherwise we're in the burbs distanceFromCityCenter = busyRadius + \ ((1.0 - busyRadius) * (randgen.randint(0, 100000) / 100000)) return distanceFromCityCenter, angleRadians def parseNogoString(nogoLine: str) -> []: """Parses a line from locations_nogo.txt and returns the polygon """ nogoLine = nogoLine.replace('\n', '').replace('\r', '') polygonStr = nogoLine.split(':', 1)[1] if ';' in polygonStr: pts = polygonStr.split(';') else: pts = polygonStr.split(',') if len(pts) <= 4: return [] polygon = [] for index in range(int(len(pts)/2)): if index*2 + 1 >= len(pts): break longitudeStr = pts[index*2].strip() latitudeStr = pts[index*2 + 1].strip() if 'E' in latitudeStr or 'W' in latitudeStr: longitudeStr = pts[index*2 + 1].strip() latitudeStr = pts[index*2].strip() if 'E' in longitudeStr: longitudeStr = \ longitudeStr.replace('E', '') longitude = float(longitudeStr) elif 'W' in longitudeStr: longitudeStr = \ longitudeStr.replace('W', '') longitude = -float(longitudeStr) else: longitude = float(longitudeStr) latitude = float(latitudeStr) polygon.append([latitude, longitude]) return polygon def spoofGeolocation(baseDir: str, city: str, currTime, decoySeed: int, citiesList: [], nogoList: []) -> (float, float, str, str, str, str, int): """Given a city and the current time spoofs the location for an image returns latitude, longitude, N/S, E/W, camera make, camera model, camera serial number """ locationsFilename = baseDir + '/custom_locations.txt' if not os.path.isfile(locationsFilename): locationsFilename = baseDir + '/locations.txt' nogoFilename = baseDir + '/custom_locations_nogo.txt' if not os.path.isfile(nogoFilename): nogoFilename = baseDir + '/locations_nogo.txt' manCityRadius = 0.1 varianceAtLocation = 0.0004 default_latitude = 51.8744 default_longitude = 0.368333 default_latdirection = 'N' default_longdirection = 'W' if citiesList: cities = citiesList else: if not os.path.isfile(locationsFilename): return (default_latitude, default_longitude, default_latdirection, default_longdirection, "", "", 0) cities = [] with open(locationsFilename, "r") as f: cities = f.readlines() nogo = [] if nogoList: nogo = nogoList else: if os.path.isfile(nogoFilename): with open(nogoFilename, "r") as f: nogoList = f.readlines() for line in nogoList: if line.startswith(city + ':'): polygon = parseNogoString(line) if polygon: nogo.append(polygon) city = city.lower() for cityName in cities: if city in cityName.lower(): cityFields = cityName.split(':') latitude = cityFields[1] longitude = cityFields[2] areaKm2 = 0 if len(cityFields) > 3: areaKm2 = int(cityFields[3]) latdirection = 'N' longdirection = 'E' if 'S' in latitude: latdirection = 'S' latitude = latitude.replace('S', '') if 'W' in longitude: longdirection = 'W' longitude = longitude.replace('W', '') latitude = float(latitude) longitude = float(longitude) # get the time of day at the city approxTimeZone = int(longitude / 15.0) if longdirection == 'E': approxTimeZone = -approxTimeZone currTimeAdjusted = currTime - \ datetime.timedelta(hours=approxTimeZone) camMake, camModel, camSerialNumber = \ _getDecoyCamera(decoySeed) validCoord = False seedOffset = 0 while not validCoord: # patterns of activity change in the city over time (distanceFromCityCenter, angleRadians) = \ _getCityPulse(currTimeAdjusted, decoySeed + seedOffset) # The city radius value is in longitude and the reference # is Manchester. Adjust for the radius of the chosen city. if areaKm2 > 1: manRadius = math.sqrt(1276 / math.pi) radius = math.sqrt(areaKm2 / math.pi) cityRadiusDeg = (radius / manRadius) * manCityRadius else: cityRadiusDeg = manCityRadius # Get the position within the city, with some randomness added latitude += \ distanceFromCityCenter * cityRadiusDeg * \ math.cos(angleRadians) longitude += \ distanceFromCityCenter * cityRadiusDeg * \ math.sin(angleRadians) longval = longitude if longdirection == 'W': longval = -longitude validCoord = not pointInNogo(nogo, latitude, longval) if not validCoord: seedOffset += 1 if seedOffset > 100: break # add a small amount of variance around the location fraction = randint(0, 100000) / 100000 distanceFromLocation = fraction * fraction * varianceAtLocation fraction = randint(0, 100000) / 100000 angleFromLocation = fraction * 2 * math.pi latitude += distanceFromLocation * math.cos(angleFromLocation) longitude += distanceFromLocation * math.sin(angleFromLocation) # gps locations aren't transcendental, so round to a fixed # number of decimal places latitude = int(latitude * 100000) / 100000.0 longitude = int(longitude * 100000) / 100000.0 return (latitude, longitude, latdirection, longdirection, camMake, camModel, camSerialNumber) return (default_latitude, default_longitude, default_latdirection, default_longdirection, "", "", 0) def getSpoofedCity(city: str, baseDir: str, nickname: str, domain: str) -> str: """Returns the name of the city to use as a GPS spoofing location for image metadata """ cityFilename = baseDir + '/accounts/' + \ nickname + '@' + domain + '/city.txt' if os.path.isfile(cityFilename): with open(cityFilename, 'r') as fp: city = fp.read().replace('\n', '') return city def _pointInPolygon(poly: [], x: float, y: float) -> bool: """Returns true if the given point is inside the given polygon """ n = len(poly) inside = False p2x = 0.0 p2y = 0.0 xints = 0.0 p1x, p1y = poly[0] for i in range(n + 1): p2x, p2y = poly[i % n] if y > min(p1y, p2y): if y <= max(p1y, p2y): if x <= max(p1x, p2x): if p1y != p2y: xints = (y - p1y) * (p2x - p1x) / (p2y - p1y) + p1x if p1x == p2x or x <= xints: inside = not inside p1x, p1y = p2x, p2y return inside def pointInNogo(nogo: [], latitude: float, longitude: float) -> bool: for polygon in nogo: if _pointInPolygon(polygon, latitude, longitude): return True return False