differential characteristics

[nagendary]

# While executing cryptosmt, i used to get the following error. Can you please help me

python cryptosmt.py --inputfile examples/salsa20/testpath.yaml

Starting search for characteristic with minimal weight
salsa - Rounds: 3 Wordsize: 32

Weight: 0 Time: 0.0s
<open file 'tmp/salsa32.stp', mode 'w' at 0x7f7eb7ebf9c0>
Traceback (most recent call last):
File "cryptosmt.py", line 207, in
main()
File "cryptosmt.py", line 203, in main
startsearch(params)
File "cryptosmt.py", line 48, in startsearch
search.findMinWeightCharacteristic(cipher, tool_parameters)
File "/home/nagendar/Desktop/temp/cryptosmt-master/cryptanalysis/search.py", line 158, in findMinWeightCharacteristic
result = solveSTP(stp_file)
File "/home/nagendar/Desktop/temp/cryptosmt-master/cryptanalysis/search.py", line 313, in solveSTP
result = subprocess.check_output(stp_parameters)
File "/usr/lib/python2.7/subprocess.py", line 567, in check_output
process = Popen(stdout=PIPE, *popenargs, **kwargs)
File "/usr/lib/python2.7/subprocess.py", line 711, in init
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1343, in _execute_child
raise child_exception
OSError: [Errno 13] Permission denied

[kste]

Thanks for reporting this problem. This should be the same as Issue #1. This error most likely means that you don't have the rights to execute STP on the system you are running.