1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
#!/usr/bin/python
# ----------------------------------------------------------------------
# Copyright (C) 2013 Kshitij Gupta <kgupta8592@gmail.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of version 2 of the GNU General Public
# License as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# ----------------------------------------------------------------------
import argparse
import atexit
import os
import re
import subprocess
import sys
from apparmor.common import init_translations
init_translations()
import apparmor.aa as apparmor
def sysctl_read(path):
value = None
with open(path, 'r') as f_in:
value = int(f_in.readline())
return value
def sysctl_write(path, value):
if not value:
return
with open(path, 'w') as f_out:
f_out.write(str(value))
def last_audit_entry_time():
out = subprocess.check_output(['tail', '-1', '/var/log/audit/audit.log'], shell=True)
logmark = None
if re.search('^*msg\=audit\((\d+\.\d+\:\d+).*\).*$', out):
logmark = re.search('^*msg\=audit\((\d+\.\d+\:\d+).*\).*$', out).groups()[0]
else:
logmark = ''
return logmark
def restore_ratelimit():
sysctl_write(ratelimit_sysctl, ratelimit_saved)
parser = argparse.ArgumentParser(description=_('Generate profile for the given program'))
parser.add_argument('-d', '--dir', type=str, help=_('path to profiles'))
parser.add_argument('-f', '--file', type=str, help=_('path to logfile'))
parser.add_argument('program', type=str, help=_('name of program to profile'))
args = parser.parse_args()
profiling = args.program
profiledir = args.dir
filename = args.file
if filename:
if not os.path.isfile(filename):
raise apparmor.AppArmorException(_('The logfile %s does not exist. Please check the path') % filename)
else:
apparmor.filename = filename
aa_mountpoint = apparmor.check_for_apparmor()
if not aa_mountpoint:
raise apparmor.AppArmorException(_('It seems AppArmor was not started. Please enable AppArmor and try again.'))
if profiledir:
apparmor.profile_dir = apparmor.get_full_path(profiledir)
if not os.path.isdir(apparmor.profile_dir):
raise apparmor.AppArmorException(_("%s is not a directory.") %profiledir)
program = None
#if os.path.exists(apparmor.which(profiling.strip())):
if os.path.exists(profiling):
program = apparmor.get_full_path(profiling)
else:
if '/' not in profiling:
which = apparmor.which(profiling)
if which:
program = apparmor.get_full_path(which)
if not program or not os.path.exists(program):
if '/' not in profiling:
raise apparmor.AppArmorException(_("Can't find %s in the system path list. If the name of the application\nis correct, please run 'which %s' as a user with correct PATH\nenvironment set up in order to find the fully-qualified path and\nuse the full path as parameter.") %(profiling, profiling))
else:
raise apparmor.AppArmorException(_('%s does not exists, please double-check the path.') %profiling)
# Check if the program has been marked as not allowed to have a profile
apparmor.check_qualifiers(program)
apparmor.loadincludes()
profile_filename = apparmor.get_profile_filename(program)
if os.path.exists(profile_filename):
apparmor.helpers[program] = apparmor.get_profile_flags(profile_filename, program)
else:
apparmor.autodep(program)
apparmor.helpers[program] = 'enforce'
if apparmor.helpers[program] == 'enforce':
apparmor.complain(program)
apparmor.reload(program)
# When reading from syslog, it is possible to hit the default kernel
# printk ratelimit. This will result in audit entries getting skipped,
# making profile generation inaccurate. When using genprof, disable
# the printk ratelimit, and restore it on exit.
ratelimit_sysctl = '/proc/sys/kernel/printk_ratelimit'
ratelimit_saved = sysctl_read(ratelimit_sysctl)
sysctl_write(ratelimit_sysctl, 0)
atexit.register(restore_ratelimit)
apparmor.UI_Info(_('\nBefore you begin, you may wish to check if a\nprofile already exists for the application you\nwish to confine. See the following wiki page for\nmore information:')+'\nhttp://wiki.apparmor.net/index.php/Profiles')
apparmor.UI_Important(_('Please start the application to be profiled in\nanother window and exercise its functionality now.\n\nOnce completed, select the "Scan" option below in \norder to scan the system logs for AppArmor events. \n\nFor each AppArmor event, you will be given the \nopportunity to choose whether the access should be \nallowed or denied.'))
syslog = True
logmark = ''
done_profiling = False
if os.path.exists('/var/log/audit/audit.log'):
syslog = False
passno = 0
while not done_profiling:
if syslog:
logmark = subprocess.check_output(['date | md5sum'], shell=True)
logmark = logmark.decode('ascii').strip()
logmark = re.search('^([0-9a-f]+)', logmark).groups()[0]
t=subprocess.call("%s -p kern.warn 'GenProf: %s'"%(apparmor.logger, logmark), shell=True)
else:
logmark = last_audit_entry_time()
q=apparmor.hasher()
q['headers'] = [_('Profiling'), program]
q['functions'] = ['CMD_SCAN', 'CMD_FINISHED']
q['default'] = 'CMD_SCAN'
ans, arg = apparmor.UI_PromptUser(q, 'noexit')
if ans == 'CMD_SCAN':
lp_ret = apparmor.do_logprof_pass(logmark, passno)
passno += 1
if lp_ret == 'FINISHED':
done_profiling = True
else:
done_profiling = True
for p in sorted(apparmor.helpers.keys()):
if apparmor.helpers[p] == 'enforce':
enforce(p)
reload(p)
apparmor.UI_Info(_('\nReloaded AppArmor profiles in enforce mode.'))
apparmor.UI_Info(_('\nPlease consider contributing your new profile!\nSee the following wiki page for more information:')+'\nhttp://wiki.apparmor.net/index.php/Profiles\n')
apparmor.UI_Info(_('Finished generating profile for %s.')%program)
sys.exit(0)
|