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Add colors

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ItsDrike 2021-05-15 03:28:56 +02:00
parent 3fe92abc2b
commit 6986a60a75
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GPG key ID: B5F6B41F708C3ADD
1 changed files with 104 additions and 33 deletions
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137
root/usr/local/bin/tamper-check
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@ -16,8 +16,12 @@ files = {
'/usr/bin/passwd': 'd4df1659159737bb4c08a430d493d257d75cdd93e18427946265ae5862a714c7',
'/usr/bin/chsh': '6bc0ae69620dde18f7942e2573afb4a6200b10269612151f48f54ef8423a64fe',
'/usr/bin/chfn': '63178af1347a62f58874640d38d605d3cb1bebe8092533787965ba317e8b553b',
'/home/itsdrike/.ssh/authorized_keys': '674806197893dbf67d3c9ba3abf049d30e571de0c4b450fc9819d3e8b0f854cc',
}
# default state of VERBOSE variable, this is controlled by flag
# `--verbose`, and should probably be kept as false by default
VERBOSE = False
# default state of ENABLE_UPDATE variable, this should be kept to false
# to make sure this script can run as cronjob, not just manually by user
# this variable will get set to True if the script is ran with `--update`
@ -40,6 +44,9 @@ import subprocess
import sys
import os
import re
import colorama
colorama.init(autoreset=True)
def _print_help(prepend_newline=False):
@ -52,6 +59,7 @@ def _print_help(prepend_newline=False):
' `--no-confirm`: Used in combination with `--update`, automatically assumes `y` for all questions\n'
' `--auto-update`: Combines `--update` and `--no-confirm`\n'
' `-e`/`--edit`: Edit this file using your $EDITOR (falls back to vi)\n'
' `-v`/`--verbose`: Verbose mode, show checksums on failures and some more info\n'
' `-h`/`--help`: Show this help'
)
@ -73,8 +81,9 @@ def _add_file(file_path, checksum):
if file_path in files:
print(
f"Unable to add '{file_path}', this file is already in the file dictionary, "
"perhaps you wanted `--update`?"
f"{colorama.Fore.RED}Path {colorama.Fore.RESET}"
f"'{colorama.Fore.BLUE}{file_path}{colorama.Fore.RESET}' {colorama.Fore.RED}"
"is already in the 'files' dictionary perhaps you wanted `--update`?"
)
return False
@ -98,7 +107,11 @@ def _add_file(file_path, checksum):
with open(this, 'w') as f:
f.write(new_contents)
except PermissionError:
print(f"PermissionError: To add a new rule, you must have write access to: '{this}' (forgot sudo?)")
print(
f'{colorama.Fore.RED}PermissionError: {colorama.Fore.RESET}'
'To add a new rule, you must have write access to: '
f"'{colorama.Fore.BLUE}{this}{colorama.Fore.RESET}' (forgot sudo?)"
)
exit(2)
return True
@ -123,31 +136,25 @@ def _update_file(file_path, new_checksum, stored_checksum):
with open(this, 'w') as f:
f.write(new_contents)
except PermissionError as e:
print(f"PermissionError: To update a rule, you must have write access to: '{this}' (forgot sudo?)")
print(
f'{colorama.Fore.RED}PermissionError: {colorama.Fore.RESET}'
'To update a rule, you must have write access to: '
f"'{colorama.Fore.BLUE}{this}{colorama.Fore.RESET}' (forgot sudo?)"
)
exit(2)
return True
def ask_update(file_path, new_checksum, stored_checksum):
if not ENABLE_UPDATE:
return False # only proceed if user input is enabled
if AUTO_UPDATE or _yes_no('Do you wish to update this checksum?'):
result = _update_file(file_path, new_checksum, stored_checksum)
print(f"Updated '{file_path}' checksum entry\n")
return result
return False # return False if user didn't agree
def _get_checksum(file):
proc = subprocess.run(['sha256sum', file], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
proc_stdout = proc.stdout.decode('utf-8')
if "No such file or directory" in proc_stdout:
print(
f"File '{file}' not found, can't produce sha256 checksum, "
"check the 'files' dictionary on the top of the program and remove this entry."
f'{colorama.Fore.RED}File {colorama.Fore.RESET}'
f"'{colorama.Fore.BLUE}{file}{colorama.Fore.RESET}'{colorama.Fore.RED} not found, "
"can't produce sha256 checksum, check the 'files' dictionary on the top of the "
'program and remove this entry.'
)
exit(2)
elif "Permission denied" in proc_stdout:
@ -160,6 +167,22 @@ def _command_exists(command):
return proc.returncode == 0
def ask_update(file_path):
new_checksum = _get_checksum(file_path)
stored_checksum = files[file_path]
file_line = f"'{colorama.Fore.BLUE}{file_path}{colorama.Fore.RESET}'"
if AUTO_UPDATE or _yes_no(' - ' + file_line + ' update checksum?'):
if AUTO_UPDATE:
print(' - updating checksum for ' + file_line) # path won't get printed by _yes_no(), so print here
result = _update_file(file_path, new_checksum, stored_checksum)
print(f'{colorama.Fore.GREEN} -> Updated')
return result
print(f'{colorama.Fore.RED} -> Staying mismatched')
return False
def run_editor():
try:
editor = os.environ['EDITOR']
@ -169,7 +192,7 @@ def run_editor():
editor = candidate
break
else:
print('Unable to find editor software, set $EDITOR')
print(f'{colorama.Fore.RED}Unable to find editor software, set {colorama.Fore.YELLOW}$EDITOR')
exit(2)
this = os.path.abspath(__file__)
@ -177,8 +200,27 @@ def run_editor():
if not os.access(this, os.W_OK):
if _command_exists('sudo'):
cmd = 'sudo ' + cmd
if VERBOSE:
print(
f'{colorama.Fore.CYAN}'
f'Running editor in escalated mode ({colorama.Fore.YELLOW}sudo{colorama.Fore.CYAN})'
)
elif _command_exists('doas'):
cmd = 'doas ' + cmd
if VERBOSE:
print(
f'{colorama.Fore.CYAN}'
'Running editor in escalated mode ({colorama.Fore.YELLOW}doas{colorama.Fore.CYAN})'
)
else:
if VERBOSE:
print(
f'{colorama.Fore.RED}'
'Running editor non-escalated, sudo/doas unaviable '
f'({colorama.Fore.YELLOW}no write perms){colorama.Fore.RED}'
)
if VERBOSE:
print(f'Starting editor: {colorama.Fore.YELLOW}{cmd}')
return subprocess.run(cmd, shell=True)
@ -188,23 +230,29 @@ def run_check():
try:
sha256_sum = _get_checksum(file)
except PermissionError as e:
print(f'{e} -- skipping file...')
print(
f"Checksum of '{colorama.Fore.BLUE}{file}{colorama.Fore.RESET}': "
f'{colorama.Fore.YELLOW}SKIPPED [PermissionError - no read perms]')
continue
if sha256_sum != checksum:
print(f"WARNING: {file} doesn't match the checksum")
print(f" -> detected: {sha256_sum}")
print(f" -> stored: {checksum}")
if ask_update(file, sha256_sum, checksum) is False:
# User did not choose to update the checksum
not_matched.append(file)
if sha256_sum != checksum:
not_matched.append(file)
print(
f"Checksum of '{colorama.Fore.BLUE}{file}{colorama.Fore.RESET}': "
f'{colorama.Fore.RED}FAIL [Checksum Mismatch]'
)
if VERBOSE:
print(f" -> detected: {colorama.Fore.CYAN}{sha256_sum}")
print(f" -> stored: {colorama.Fore.CYAN}{checksum}")
else:
print(f"Checksum of '{colorama.Fore.BLUE}{file}{colorama.Fore.RESET}': {colorama.Fore.GREEN}OK")
return not_matched
def analyze_args():
# Using globals isn't usually ideal solution,
# but it is the easiest way to handle this
global ENABLE_UPDATE, AUTO_UPDATE, TO_ADD
global VERBOSE, ENABLE_UPDATE, AUTO_UPDATE, TO_ADD
try:
args = sys.argv[1:]
@ -224,8 +272,13 @@ def analyze_args():
if os.path.exists(path):
TO_ADD.append(path)
else:
print(f"Can't add {path} -> non-existent path")
print(
f'{colorama.Fore.RED}FileNotFoundError: {colorama.Fore.RESET}'
f"'{colorama.Fore.BLUE}{path}{colorama.Fore.RESET}' -> invalid path"
)
exit(2)
elif arg in ('-v', '--verbose'):
VERBOSE = True
elif arg in ('-e', '--edit'):
run_editor()
exit()
@ -233,7 +286,7 @@ def analyze_args():
_print_help()
exit()
else:
print(f'Unrecognized flag: {arg}')
print(f'{colorama.Fore.RED}Unrecognized flag: {colorama.Fore.YELLOW}{arg}')
_print_help(prepend_newline=True)
exit(2)
@ -246,13 +299,31 @@ if __name__ == '__main__':
for file in TO_ADD:
checksum = _get_checksum(file)
if _add_file(file, checksum):
print(f"Added '{file}': '{checksum}'")
print(
f"Added '{colorama.Fore.YELLOW}{file}{colorama.Fore.RESET}': "
f"'{colorama.Fore.CYAN}{checksum}{colorama.Fore.RESET}'"
)
exit(0) # when adding files, don't run the check too
# run the actual checksum verifier
not_matched = run_check()
if len(not_matched) > 0:
if len(not_matched) > 0 and ENABLE_UPDATE is True:
print(f'\nFiles with mismatched checksums:')
unfixed = not_matched.copy()
for mismatched_file in not_matched:
if ask_update(mismatched_file) is True:
# User did not choose to update the checksum
unfixed.remove(mismatched_file)
if len(unfixed) > 0:
exit(1) # we still have some unfixed mismatched checksums, exit with 1
elif len(not_matched) > 0:
print(f'\nFiles with mismatched checksums:')
for mismatched_file in not_matched:
print(
f'{colorama.Fore.RED} - '
f"{colorama.Fore.RESET}'{colorama.Fore.BLUE}{mismatched_file}{colorama.Fore.RESET}'"
)
exit(1) # exit with error code in case we have changed checksums
else:
print("All checksums are correct")
print(f'\n{colorama.Fore.GREEN}All checksums are correct')