From b35491eb2cd6bff00e0c45c8fad0c5aa85f84c74 Mon Sep 17 00:00:00 2001 From: "gasperfele@fri1.uni-lj.si" Date: Mon, 26 Oct 2015 13:22:23 +0000 Subject: added first non-working complete version of the exam task git-svn-id: https://svn.lusy.fri.uni-lj.si/kpov-public-svn/kpov-public@340 5cf9fbd1-b2bc-434c-b4b7-e852f4f63414 --- kpov_judge/kpov_random_helpers.py | 2 +- kpov_judge/tasks/mock_entrance_exam/task.py | 154 ++++++++++++++++++++++------ 2 files changed, 121 insertions(+), 35 deletions(-) (limited to 'kpov_judge') diff --git a/kpov_judge/kpov_random_helpers.py b/kpov_judge/kpov_random_helpers.py index 0a25d00..fc422fa 100755 --- a/kpov_judge/kpov_random_helpers.py +++ b/kpov_judge/kpov_random_helpers.py @@ -119,7 +119,7 @@ default_generators = { 'username': username_gen, 'password': lambda r: alnum_gen(r, 8), 'short_text': lambda r: fortune(r, 40), - 'uint': lambda r: r.nextint(0, 2**32), + 'uint': lambda r: r.randint(0, 2**32), 'hostname': lambda r: hostname_gen(r), None: lambda r: alnum_gen(r, 8), '': unknown_generator, diff --git a/kpov_judge/tasks/mock_entrance_exam/task.py b/kpov_judge/tasks/mock_entrance_exam/task.py index 341ae07..7080f4c 100644 --- a/kpov_judge/tasks/mock_entrance_exam/task.py +++ b/kpov_judge/tasks/mock_entrance_exam/task.py @@ -121,6 +121,12 @@ def task(student_IP, net_prog_name, arg_val = "".join([r.choice('ABCDEFGHIJKLMNPRSTUVZ012345') for i in xrange(13)]) stdin_val = "".join([r.choice('ABCDEFGHIJKLMNPRSTUVZ012345') for i in xrange(17)]) + conn.sendline('ls -l {}'.format(P_script)) + conn.prompt() + results['script_ls'] = conn.before() + conn.sendline('ls -l {}'.format(P_executable)) + conn.prompt() + results['executable_ls'] = conn.before() conn.sendline('export {}={}; {}'.format(env_c, env_val, P_script)) conn.prompt() results['script_run'] = conn.before() @@ -130,10 +136,10 @@ def task(student_IP, net_prog_name, conn.sendline('cat {}', out_stdout_c) conn.prompt() results['script_stdout'] = conn.before() - conn.sendline('echo "{}" | {} "{}" 2> /dev/null'.format(stdin_val, P_c, arg_val)) + conn.sendline('echo "{}" | {} "{}" 2> /dev/null'.format(stdin_val, P_executable, arg_val)) conn.prompt() results['prog_stdout'] = conn.before() - conn.sendline('echo "{}" | {} "{}" > /dev/null'.format(stdin_val, P_c, arg_val)) + conn.sendline('echo "{}" | {} "{}" > /dev/null'.format(stdin_val, P_executable, arg_val)) conn.prompt() results['prog_stderr'] = conn.before() target.logout() @@ -144,58 +150,138 @@ def gen_params(user_id, params_meta): r = random.Random(user_id) params = kpov_random_helpers.default_gen(user_id, params_meta) homedir = '/home/student' - params['env_c'] = "".join([r.choice('ABCDEFGHIJKLMNPRSTUVZ') for i in xrange(5)]) params['P_c'] = "".join([r.choice('abcdefghijklmnoprst') for i in xrange(5)]) + ".c" params['param_gen_seed'] = r.randint(0, 2**24) params['c_destroy_gen_seed'] = r.randint(0, 2**24) - for k in []: - params[k] = homedir + params[k] + for k in ['P_c', 'P_executable', 'out_stderr_c', 'P_script', 'out_stdout_c']: + params[k] = homedir + params[k] return params def task_check(results, params): import os + def test_out_gen(arg, var): + s_out = "" + s_err = "" + r = 0 + arg_len = len(arg) + env_len = len(var) + for i in xrange(100): + s_out += chr(20 + (ord(arg[i % arg_len]) ^ ord(var[i % env_len]) % 64)) + r += ord(arg[i % arg_len]) + ord(var[i % env_len]) + i; + if (i % 20 == 0): + s_out += "RAUS\n"; + if (i % 31 == 0): + s_out += 'ma' + s_err += chr(r % 32 + ord('A')); + if (i % 23 == 0): + s_err += "PATACIS\n" + retval = r % 16 + return(s_out, s_err, retval) + score = 0 hints = [] - r = random.Random(param_gen_seed) + r = random.Random(params['param_gen_seed']) env_val = "".join([r.choice('ABCDEFGHIJKLMNPRSTUVZ012345') for i in xrange(11)]) - arg_val = "".join([r.choice('ABCDEFGHIJKLMNPRSTUVZ012345') for i in xrange(13)]) stdin_val = "".join([r.choice('ABCDEFGHIJKLMNPRSTUVZ012345') for i in xrange(17)]) - - matched = 0 - files = os.listdir(params['folder']) - for fn in files: - if fn in results['files']: - matched += 1 - if matched > 0: - score = 1 + expected_script_stdout, expected_script_stderr, rval = test_out_gen( + params['arg_c'], env_val + ) + split_stderr = expected_script_stderr.split('\n') + expected_script_stderr = "\n".join([ i for i in split_stderr if i.find('ma') >= 0]) + if expected_script_stderr != results['script_stderr']: + hints += ['wrong script stderr'] + else: + score += 2 + if expected_script_stdout != results['script_stdout']: + hints += ['wrong script stdout'] + else: + score += 2 + expected_prog_stdout, expected_prog_stderr, rval = test_out_ge-n( + arg_val, stdin_val + ) + if expected_prog_stderr != results['prog_stderr']: + hints += ['wrong program stderr'] else: - hints += ["no files"] - if matched > len(files)/2: score += 2 + if expected_prog_stdout != results['prog_stdout']: + hints += ['wrong program stdout'] else: - hints += ["less than half the files"] - if (matched == len(files)): - score += 3 + score += 2 + if results['script_ls'].find('-r') < 0: + hints += ['script not found'] else: - hints += ["wrong number of files"] - rl = results['contents'].split('\n') - rl.sort() - tl = [] - for fn in files: - with open(fn) as f: - tl += f.read().upper().split('\n') - tl.sort() - if rl == tl: - score += 4 + score += 1 + if results['executable_ls'].find('xr') < 0: + hints += ['C executable not found'] else: - hints += ["wrong files"] + score += 1 return hints, score def prepare_disks(templates, params): - import random - c_source = """ + c_source = """#include +#include +#include +/* Odstranite vse odvecne velike crke Q, W ali X in program se bo prevedel. */ +int main(int argc, char **argv){ + unsigned char *arg; + unsigned char var[255]; + int i, arg_len, env_len, r; + scanf("%s", var); + arg = argv[1]; + arg_len = strlen(argv[1]); + env_len = strlen(var); + r = 0; + for (i = 0; i<100; i++){ + printf("%c", 20 + (arg[i % arg_len] ^ var[i % env_len] % 64)); + r += (int)arg[i % arg_len] + (int)var[i % env_len] + i; + if (i % 20 == 0){ + printf("RAUS\n"); + } + if (i % 31 == 0){ + printf("ma"); + } + fprintf(stderr, "%c", r % 32 + 'A'); + if (i % 23 == 0){ + fprintf(stderr, "PATACIS\n"); + } + } + printf("\n"); + fprintf(stderr, "\n"); + return r % 16; +} """ - pass + evil_shell_source = """#!/bin/sh +while true; do + ifconfig eth1 10.0.2.19; + ifconfig eth0 10.0.2.20; + ifconfig eth2 10.0.2.21; + sleep 10; +done +""" + import random + d = templates['Student'] + r = random.Random(params['c_destroy_gen_seed']) + destroyed_c_source = c_source[:100] + for c in c_source[100:]: + i = r.randint(0, 5) + if i == 1: + destroyed_c_source += 'QW' + if i == 2: + destroyed_c_source += 'XW' + if i == 3: + destroyed_c_source += 'QX' + destroyed_c_source += c + d.write(params['P_c'], destroyed_c_source) + d.chown(1000, 1000, params['P_c']) + sh_path ='/usr/local/bin' + params['net_prog_name'] + d.write(sh_path, evil_shell_source) + d.chmod(0775, sh_path) + d.write("/etc/rc.local", """#!/bin/sh -e + +{} + +exit 0 +""".format(sh_path)) -- cgit v1.2.1