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Acest script cross-platform permite rularea unei comenzi batch/bash cu parametri variabili preluati din fisiere text, linie cu linie. Am simtit nevoia sa fac ceva mai general tocmai din cauza multor subiecte si cereri pe tema asta. Indiferent cate comenzi veti executa tot outputul e afisat in timp real in aceeasi consola (sau si intr-un fisier) fara sa se amestece (se presupune a folosi comenzi de aceeasi speta ce genereaza un output calitativ nu cantitativ), iar preluarea comenzilor este foarte stabila, respecta cu strictete numarul threadurilor alocate si ordinea in functie de timpi. Codul este pur Python, pana si executarea comenzilor se face in procese separate independente de terminal, ceea ce previne shell injection si alte neplaceri cu restrictia unor "smenuri" tipice bash, dar acest comportament poate fi schimbat prin modificarea si adaugarea unui argument din clasa Popen, oricum nu intru in amanunte, fiindca e in afara scopului si nici nu cred ca va veti lovi de problema asta. Foloseste Python 2.x, testat pe windows 7 si backtrack cu un script simplu ca: #include <stdio.h> #include <time.h> #include <windows.h> #define N 10 /* N phases */ int main(int argc, char* argv[]) { int i; for (i = 0; i < N; ++i) { printf("Process %s with %s at phase %d.\n", argv[1], argv[2], i); fflush(stdout); Sleep(1000); /* replace with sleep(1) on posix */ } return 0; } Parametrii de test luati din 2 fisiere prin linia: run.py -t 2 -d 0.5 scan.exe @a.txt @b.txt P.S.: Atentie la output, imaginati-va putin cam cum va arata ceea ce urmeaza sa faceti ca sa nu aveti surprize. cd in folderul cu scriptul chmod +x ./run.py ./run.py -> vezi usage http://codepad.org/tn3Xwohw #! /usr/bin/env python # Shell Multi Runner # 12.02.2012 cmiN # # Execute commands in terminal asynchronously using subprocess # and show all output merged into one console. # # Contact: cmin764@yahoo/gmail.com import subprocess # better than popen/system/respawn from sys import argv, stdout from time import sleep from threading import active_count, Thread # parallelism # some settings FILE = None # output to file too THRD = 10 # threads DLAY = 1 # delay CHAR = '@' # wildcard # instantiated in only one object class Show(file): """ Thread safe printing class. Uses primitive locks. """ def __init__(self, fname=None): """ If `fname` isn't `None` write output to file too. """ self.locked = False # unlocked self.open_file(fname) def __del__(self): """ Destructor. Close an opened file. """ if self.fname: self.close() def open_file(self, fname): """ Open file for writing. """ self.fname = fname if fname: # init file super(Show, self).__init__(fname, 'w') def write(self, data): """ Safe write. """ while self.locked: # if writing in progress pass # wait # lock self.locked = True # write data if self.fname: super(Show, self).write(data) stdout.write(data) # flush data if self.fname: self.flush() stdout.flush() # release self.locked = False def fileno(self): """ Experimental. Used as file descriptor replacing pipes. """ if self.fname: return super(Show, self).fileno() return stdout.fileno() class Engine(Thread): """ Execute each command in a separate thread and listen for it's output. """ def __init__(self, command): super(Engine, self).__init__() # superclass constructor self.command = command def run(self): """ Function called from outside by `start` method. """ # fork the fucking process pobj = subprocess.Popen(self.command.split(), stdout=subprocess.PIPE, stderr=subprocess.STDOUT) # listen for new input while True: line = pobj.stdout.readline() if line == "": # more output it's about to come if pobj.poll() != None: # nope break # so exit continue # try again report.write(line) # globals usage = """ Usage: {0} [options] command Options: -t, --threads <int> how many asynchronous threads to run -d, --delay <float> time in seconds to wait between each run -f, --file <str> write output to file too Commands: <any valid command> ex: wget {1}links.txt If you preceed a parameter with {1} it becomes a list with parameters taken from a file called like itself. Old: ./scan -h 91.202.91.119 -u usr.txt -p pwd.txt New: {0} ./scan -h {1}hosts.txt -u usr.txt -p pwd.txt """.format(argv[0], CHAR) report = Show() # make verbose object def generate(command, expand, pos): """ Format command recursively. """ if pos == len(expand): # now command string is complete sleep(DLAY) # delay while active_count() > THRD: pass # wait if number of threads is exceeded report.write("[+] Start: %s\n" % command) Engine(command).start() return expand[pos].seek(0) # rewind for line in expand[pos]: generate(command.replace("{%d}" % pos, line.strip()), expand, pos + 1) def main(): global FILE, THRD, DLAY, CHAR # check if len(argv) == 1 or argv[1] in ('-h', "--help"): print usage return # insuficient parameters # parse report.write("[+] Parsing...\n") argv.pop(0) # remove script name command = "" ind = 0 # index expand = [] # list with special parameters while ind < len(argv): if argv[ind] in ('-t', "--threads"): ind += 1 THRD = int(argv[ind]) elif argv[ind] in ('-d', "--delay"): ind += 1 DLAY = float(argv[ind]) elif argv[ind] in ('-f', "--file"): ind += 1 FILE = argv[ind] report.open_file(FILE) elif argv[ind][0] == CHAR: # reserve variable parameter for special ones command += ' ' + "{%d}" % (len(expand)) # add to list special parameters (`CHAR`<smth>) expand.append(open(argv[ind][1:], 'r')) # file objects else: command += ' ' + argv[ind] ind += 1 # process report.write("[+] Processing...\n") generate(command.strip(), expand, 0) while active_count() > 1: pass # wait for running threads report.write("[+] Done.\n") if __name__ == "__main__": main() Updated: 14.02.2012

Screen Dupa cum spune si titlul, acest soft ascunde text in imagini, pentru mai multe detalii vezi comentariul sursei. L-am pus aici ca sa ramana mai mult timp "vizibil", daca e vreo problema il mut la stuff. In 3 zile, 300 linii de cod, m-am gandit sa ma rezolv cat de cat cu atestatul si cum iubesc sursa libera si impartasirea ei pun la dispozitie asta: http://codepad.org/hNzxFzFT #! /usr/bin/env python # Text In Image # 02.01.2012 cmiN # # This is a simple GUI script which can hide text in pictures # using least significant bit method. # Also the input text can be encrypted and the output can be decrypted too # with a symmetric key using AES. # Writing is done directly on input image so be careful with certain extensions # because the output will always have the BMP format. # # Contact: cmin764@yahoo/gmail.com from Tkinter import * # widgets's classes from tkFileDialog import askopenfilename # get file name from tkMessageBox import showerror, showinfo # user dialog from PIL import Image # image converting from Crypto.Cipher import AES # text cipher class Engine: """ Code for processing the image. Separated from GUI. """ def __init__(self): """ Initialize parameters. """ self.ext = "bmp" # save format self.name = None # save name self.path = None # save path self.im = None # image object, read and write self.generator = None # get locations to write/read bits self.useAES = None # use it or not self.aes = None # AES object self.data = None # data to be written to image self.width = None # image width self.height = None # image height self.tmp = None # last string, used when key changes def binary(self, nr, size): """ Get 1&0 representation. """ return bin(nr).replace("0b", "").zfill(size * 8) def path_name(self, path): """ Split a file path in path and name. """ ind = path.rfind("/") + 1 return (path[:ind], path[ind:]) def set_generator(self): """ Useful for resetting. """ self.generator = ((wp, hp, ch) for wp in xrange(self.width) # WxHxC for hp in xrange(self.height) for ch in xrange(3)) def load(self, path): """ Load image. """ self.im = Image.open(path) (self.width, self.height) = self.im.size (self.path, self.name) = self.path_name(path) return self.width * self.height * 3 # total useful bytes def parse_key(self, key): """ If key exists make an AES object from it. """ if not key: self.aes = None # empty key == no encryption return self.parse_string(self.tmp) # must return size (see the next return) key.decode() # test availability size = len(key) for padding in (16, 24, 32): # fixed key size if size <= padding: break key += chr(0) * (padding - size) self.aes = AES.new(key) return self.parse_string(self.tmp) # if key changes you must update string def parse_string(self, string): """ Convert to bitstring. """ if not string: # without string can't start the process self.tmp = None self.data = None return 0 string.decode() # test availability self.tmp = string if self.useAES and self.aes: # encrypt it string += chr(0) * ((16 - len(string) % 16) % 16) # multiple of 16 string string = self.aes.encrypt(string) string = str().join([self.binary(ord(x), 1) for x in string]) # convert every char in a set of 8 bits size = self.binary(len(string), 4) # get binary representation of string's length in 4 bytes self.data = size + string return len(self.data) def write(self): """ Write using LSB. """ self.set_generator() # rearm for bit in self.data: (wp, hp, ch) = self.generator.next() # get next position values = list(self.im.getpixel((wp, hp))) # retrieve its values tmp = self.binary(values[ch], 1) # convert one of them values[ch] = int(tmp[:7] + bit, 2) # alter that channel self.im.putpixel((wp, hp), tuple(values)) # put it back self.im.save(self.path + self.name, format=self.ext) # save the new output def read(self): """ Read from every LSB. """ self.set_generator() # rearm total = self.width * self.height * 3 if total < 32: raise Exception("Text not found.") size = chunk = string = str() i = 0 # for(i=0; true; ++i) while True: (wp, hp, ch) = self.generator.next() # i byte values = self.im.getpixel((wp, hp)) tmp = self.binary(values[ch], 1) if i < 32: # it's lame but I prefer string/bitset size += tmp[7] if i == 31: size = int(size, 2) if size < 1 or (size + 32) > total: raise Exception("Text not found.") elif i < size + 32: chunk += tmp[7] if len(chunk) == 8: string += chr(int(chunk, 2)) chunk = str() else: break i += 1 if self.useAES and self.aes: if len(string) % 16 != 0: raise Exception("Text not encrypted.") string = self.aes.decrypt(string).rstrip(chr(0)) string.decode() # raise an exception if invalid return string class GUI(Frame): """ Main window, inherited from Frame. Here we put our widgets and set their behavior. """ def __init__(self, master=None, margin=30): """ Same as Frame's constructor. """ Frame.__init__(self, master, padx=margin, pady=margin) self.grid() self.widgets() self.behavior() def widgets(self): """ Build and grid widgets. """ # ---- create variables ---- self.totalBytes = IntVar() # depends on image size self.usedBytes = IntVar() # how many of them are used self.textStatus = StringVar() # used per total bytes self.useEncryption = IntVar() # 0-plain 1-AES self.mode = IntVar() # 0-read 1-write self.textOpt = dict() # text last config self.keyOpt = dict() # key last config self.loaded = False # image loaded or not # ---- create widgets ---- self.label = Label(self, textvariable=self.textStatus) self.about = Label(self, text="About", fg="blue") self.text = Text(self, width=30, height=5, fg="grey") self.scrollbar = Scrollbar(self, orient="vertical", command=self.text.yview) self.loadButton = Button(self, text="Load", width=5, command=lambda: self.action("load")) self.readRadio = Radiobutton(self, text="Read", variable=self.mode, value=0, command=self.set_state) self.checkButton = Checkbutton(self, text="Use AES", variable=self.useEncryption, onvalue=1, offvalue=0, command=self.set_state) self.startButton = Button(self, text="Start", width=5, state="disabled", command=lambda: self.action("start")) self.writeRadio = Radiobutton(self, text="Write", variable=self.mode, value=1, command=self.set_state) self.keyEntry = Entry(self, width=10, fg="grey", show="*") # ---- show widgets ---- self.label.grid(row=0, column=0, columnspan=2, sticky="w") self.about.grid(row=0, column=2, sticky="e") self.text.grid(row=1, column=0, rowspan=3, columnspan=3) self.scrollbar.grid(row=1, column=3, rowspan=3, sticky="ns") self.loadButton.grid(row=4, column=0, sticky="w", pady=5) self.readRadio.grid(row=4, column=1) self.checkButton.grid(row=4, column=2, sticky="e") self.startButton.grid(row=5, column=0, sticky="w") self.writeRadio.grid(row=5, column=1) self.keyEntry.grid(row=5, column=2, sticky="e") def behavior(self): """ Customize widgets. """ self.text.config(yscrollcommand=self.scrollbar.set) self.text.insert(0.0, "Text here") self.keyEntry.insert(0, "Key here") self.text.bind("<Button>", self.handle_event) self.text.bind("<KeyRelease>", self.handle_event) self.keyEntry.bind("<Button>", self.handle_event) self.keyEntry.bind("<KeyRelease>", self.handle_event) self.textOpt = self.get_opt(self.text) self.keyOpt = self.get_opt(self.keyEntry) self.about.bind("<Button>", self.handle_event) self.set_state() def action(self, arg): """ What every button triggers. """ if arg == "load": fileTypes = [("BMP", "*.bmp"), ("JPEG", ("*.jpeg", "*.jpg")), ("PNG", "*.png"), ("All Files", "*.*")] path = askopenfilename(parent=self, title="Open image", filetypes=fileTypes) if path != "": try: self.totalBytes.set(app.load(path)) except IOError as msg: showerror("Error", str(msg).capitalize().strip(".") + ".") # some formatting else: self.loaded = True self.set_state() self.master.title("Text In Image - %s" % app.name) # update name in title elif arg == "start": if self.mode.get(): try: app.write() except Exception as msg: showerror("Error", str(msg).capitalize().strip(".") + ".") else: showinfo("Info", "Done.") else: try: string = app.read() except UnicodeError: showerror("Error", "Text not found or wrong key.") except Exception as msg: showerror("Error", str(msg).capitalize().strip(".") + ".") else: self.text.config(state="normal") self.textOpt["fg"] = "black" # touched self.text.delete(0.0, END) self.text.insert(0.0, string) self.text.config(state="disabled") self.usedBytes.set(app.parse_string(string)) self.set_status() showinfo("Info", "Done.") def set_status(self): """ Get used per total bytes. """ string = "%9.3f%s/%9.3f%s" unit1 = unit2 = "b" used = self.usedBytes.get() total = self.totalBytes.get() if used > total: self.label.config(fg="red") else: self.label.config(fg="black") if used > 999999: unit1 = "Mb" used /= 1000000.0 elif used > 999: unit1 = "Kb" used /= 1000.0 if total > 999999: unit2 = "Mb" total /= 1000000.0 elif total > 999: unit2 = "Kb" total /= 1000.0 self.textStatus.set(string % (used, unit1, total, unit2)) def get_opt(self, widget): """ Get some options from a widget then pack them. """ opt = dict() opt["state"] = widget["state"] opt["fg"] = widget["fg"] opt["bg"] = widget["bg"] return opt def set_state(self): """ Enable or disable a widget according to option selected. """ if self.mode.get(): # write self.text.config(**self.textOpt) else: self.text.config(state="disabled", bg="lightgrey", fg="darkgrey") if self.useEncryption.get(): # use AES self.keyEntry.config(**self.keyOpt) app.useAES = True else: self.keyEntry.config(state="disabled") app.useAES = False length = app.parse_string(app.tmp) self.usedBytes.set(length) self.set_status() if self.loaded: # a file is loaded if self.mode.get() == 0: # read mode ok = True elif app.data != None and self.usedBytes.get() <= self.totalBytes.get(): ok = True else: ok = False else: ok = False # no file loaded if ok: self.startButton.config(state="normal") else: self.startButton.config(state="disabled") def handle_event(self, event): """ Handle events for specific widgets. """ if event.widget is self.text and self.text["state"] == "normal": if self.text["fg"] == "grey": self.text.delete(0.0, END) self.textOpt["fg"] = self.text["fg"] = "black" string = self.text.get(0.0, END).strip() try: length = app.parse_string(string) except UnicodeError: showerror("Error", "Invalid text.") else: self.usedBytes.set(length) self.set_state() elif event.widget is self.keyEntry and self.keyEntry["state"] == "normal": if self.keyEntry["fg"] == "grey": self.keyEntry.delete(0, END) self.keyOpt["fg"] = self.keyEntry["fg"] = "black" key = self.keyEntry.get()[:32] # first 32 (max size is 32) try: length = app.parse_key(key) except UnicodeError: showerror("Error", "Invalid key.") else: self.usedBytes.set(length) self.set_state() elif event.widget is self.about: showinfo("About", "Hide text, which can be encrypted with AES, in pictures, preferably bitmaps. Coded by cmiN. Visit rstcenter.com") if __name__ == "__main__": app = Engine() # core root = Tk() # toplevel root.title("Text In Image") root.maxsize(350, 250) root.iconbitmap("tii.ico") # comment if you don't have one GUI(root) root.mainloop() Testat pe windows, fedora si slackware, merge perfect, dar sa cititi comentariul principal. Aveti nevoie de python 2.7, PIL si pycrypto. Pe linux de obicei sunt preinstalate. Versiune portabila: box gamefront Updated: 14.01.2012

Salut, Incerc in python sa generez niste scaderii care sa implice 2 numere intre 10 si 100 si modul 10 al scazatorului sa fie mai mare ca modul 10 al descazutului. Mica mea functie pare sa functioneze, dar cum am implementat-o nu mi se pare ok. Are cineva alte idei? Multumesc, def genScaderiCuTrecere(n): """ Genereaza scaderi cu trecere peste 10""" assert int(n), "you need to give an integer as parameter" for i in range (0,n): while True: a = random.randrange(10,100) b = random.randrange(10,100) print "Am generat a= " + str(a) + " si b= " + str ( if a > b and a%10 < b%10: break print "\n\nscaderea generata este: \n\n\t" + str(a) + "-" + str( + "=" return None

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Quick reference contents: Front matter Invocation Options Environment variables Lexical entities : keywords, identifiers, string literals, boolean constants, numbers, sequences, dictionaries, operators Basic types and their operations: None, bool, Numeric types, sequence types, list, dictionary, string, file, set, named tuples, date/time Advanced types Statements: assignment, conditional expressions, control flow, exceptions, name space, function def, class def Iterators; Generators; Descriptors; Decorators Built-in Functions Built-in Exceptions Standard methods & operators redefinition in user-created Classes Special informative state attributes for some types Important modules : sys, os, posix, posixpath, shutil, time, string, re, math, getopt List of modules in the base distribution Workspace exploration and idiom hints Python mode for Emacs Html: Python 2.6 Quick Reference Pdf: http://rgruet.free.fr/PQR26/PQR2.6_modern_a4.pdf Older version: Python page Richard Gruet