What is the version of your subprocess.py ?

[tangxun1688]

Hi, I just want to use the code to test, but I found out that maybe something wrong with subprocess.py, I will attach the error so you can tell me what's going on?

Thank you so much.

D:\Study\infromationSecurity\SHA1>python collide.py PDF1.pdf PDF2.pdf [17:58:23] INFO: rendering file 1... Traceback (most recent call last): File "collide.py", line 359, in exit(main(sys.argv[1:])) File "collide.py", line 351, in main doit(outdir, args) File "collide.py", line 253, in doit '-o', os.path.join(outdir, 't%d-%%04d.png' % (i + 1)), fn]) File "C:\Users\Ryan\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 342, in check_call retcode = call(*popenargs, *kwargs) File "C:\Users\Ryan\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 323, in call with Popen(popenargs, **kwargs) as p: File "C:\Users\Ryan\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 775, in init restore_signals, start_new_session) File "C:\Users\Ryan\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 1178, in _execute_child startupinfo)

[nneonneo]

As I mentioned in the README, you will need ghostscript and turbojpeg installed and on your PATH. I also haven't tested this script with Windows, so it's possible that there's an incompatibility.

I'm not seeing the last line of the exception - mind posting that?

[tangxun1688]

[18:11:24] INFO: rendering file 1... Traceback (most recent call last): File "collide.py", line 317, in exit(main(sys.argv[1:])) File "collide.py", line 311, in main doit(outdir, args) File "collide.py", line 214, in doit '-o', os.path.join(outdir, 't%d-%%04d.png' % (i+1)), fn]) File "/Users/xinyu/anaconda3/lib/python3.6/subprocess.py", line 306, in check_call retcode = call(*popenargs, *kwargs) File "/Users/xinyu/anaconda3/lib/python3.6/subprocess.py", line 287, in call with Popen(popenargs, **kwargs) as p: File "/Users/xinyu/anaconda3/lib/python3.6/subprocess.py", line 729, in init restore_signals, start_new_session) File "/Users/xinyu/anaconda3/lib/python3.6/subprocess.py", line 1364, in _execute_child raise child_exception_type(errno_num, err_msg, err_filename) FileNotFoundError: [Errno 2] No such file or directory: 'gs': 'gs'

[nneonneo]

Yes, as mentioned you will need GhostScript (gs) installed on your PATH somewhere. The sha1collider uses ghostscript to render PDF files into images for embedding.

[tangxun1688]

I think I successfully installed GS, but it still doesn't work. BTW, I am not sure how to install turbojpeg.

D:\Study\infromationSecurity\SHA1>python collide.py PDF1.pdf PDF2.pdf [18:32:46] INFO: rendering file 1... Traceback (most recent call last): File "collide.py", line 359, in exit(main(sys.argv[1:])) File "collide.py", line 351, in main doit(outdir, args) File "collide.py", line 253, in doit '-o', os.path.join(outdir, 't%d-%%04d.png' % (i + 1)), fn]) File "C:\Users\Ryan\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 342, in check_call retcode = call(*popenargs, *kwargs) File "C:\Users\Ryan\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 323, in call with Popen(popenargs, **kwargs) as p: File "C:\Users\Ryan\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 775, in init restore_signals, start_new_session) File "C:\Users\Ryan\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 1178, in _execute_child startupinfo) FileNotFoundError: [WinError 2]

[nneonneo]

You'll need to add the path to the gs binary in your PATH and restart your console. For turbojpeg, if you have the cjpeg binary that will be enough; you might be able to find a copy of a prebuilt Windows version, or compile the source build from ijg.

If you're on Linux or Mac, your package manager probably has ghostscript and turbojpeg available.