optools/gpg/kant/kant.py

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#!/usr/bin/env python3
import argparse
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import base64
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import csv
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import datetime
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import json
import lzma
import operator
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import os
import re
import shutil
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import smtplib
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import subprocess
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from email.message import Message
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from functools import reduce
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from io import BytesIO
from socket import *
import urllib.parse
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import jinja2 # non-stdlib; Arch package is python-jinja2
import gpg # non-stdlib; Arch package is "python-gpgme" - see:
import gpg.constants # https://git.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/gpgme and
import gpg.errors # https://gnupg.org/ftp/gcrypt/gpgme/ (incl. python bindings in build)
import pprint # development debug
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class SigSession(object): # see docs/REFS.funcs.struct.txt
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def __init__(self, args):
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# These are the "stock" templates for emails. It's a PITA, but to save some space since we store them
# inline in here, they're XZ'd and base64'd.
self.email_tpl = {}
self.email_tpl['plain'] = ('/Td6WFoAAATm1rRGAgAhARwAAAAQz1jM4AWYAs1dACQZSZhvFgKNdKNXbSf05z0ZPvTvmdQ0mJQg' +
'atgzhPVeLKxz22bhxedC813X5I8Gn2g9q9Do2jPPViyuLf1SFHDUx1m7SEFsSUyT7L/j71tuxRZi' +
'xLyy6P3mHo3HeUhwgpgh6lvMYwlTf+zhj3558RJmhXprLteoKt/sY4NIMzz3TBa0ivsVo6EFA9/G' +
'2q1MpuHxg86uY1pA4tkFlmxuSklZq5EKuu7B5RSeUGB+SsjDPSfsdhoPngMET1EXTZfVSWezjJkH' +
'REyn5SgqpD7vwmwvZWcwWua+V+e/rYYF1cx0Y0Wi1wAC6NzGDce3gbcr/k6M/PiMi8ekJPCmgMgP' +
'R4GBtRi121wU374nml42WjdGjHee6Se6d0OGKscJjB5Z1eSOho63OMn5Ayu4Lvl05L/mB88Hnk5e' +
'MayYmXqQdhx3ualWiD/TdHwLf+79t43wfjs6Z/aq/lku67SGdUpjuYRV52nls6WPTuBmo2oCbzpP' +
'MojIXiYHR3cWebI2CdnVTTHHz7el4NAWIlPKtZkPR6VYj2DkND4kmkO92I258hUqLARWnNaywx87' +
'hFzhaGN9oKZdozKSZpEDyZUsymWuhQnnY76EImeha67LJwSsXLpBxuViCNlqv7ATT9iffzDmjm0i' +
'2MeLix3rBRMWp4MmWC8bP1ZAKOEq4M3hwjt1q68fH4QvtmTyic/7DBW2KsgZRu21RjK7tHtKTxwy' +
'2UN3pGT6uZRL8vNRNvD70UaeD5MW7lFBPehIeFoByaEKGFfeS8dKc1VFauDmkRlhOboLkPqqwbV+' +
'tUmU8UvTftKIx1RwTm3FKqjKCYrdqp0fL5wsA93YhRJqHfkvtjCjzRc0czszURkJMHfPyttQg2jb' +
'UQVIg40XMgew2EUdCrJC3wTvXm9tBxMqXAFBn6S4ihqiJ5PTUDKCx7EnAjK3kUwbWvDno8h1M9u9' +
'teC5CEWhcAAAAAAwG5UqO9bdswAB6QWZCwAAKFDj9rHEZ/sCAAAAAARZWg==')
self.email_tpl['html'] = ('/Td6WFoAAATm1rRGAgAhARwAAAAQz1jM4AXiAt1dAB4aCobvStaHNqdVBn1LjZcL+G+98rmZ7eGZ' +
'Wqx+3LjENIv37L1aGPICZDRBrsBugzVSasRBHkdHMrWW7SsPfRzw6btQfASTHLr48auPJlJgXTnb' +
'vgDd2ELrs6p5kXZwE7+pedhgffAcekwr0eyqVNzzdUWJpvZcDBGtp+yvIwSAcrKkUxUd5AFBigd3' +
'4IW1XEK3eQ+LSSEIquUugrd3xiFB4rkSSDGbAuVLqy4Sq3w5c8RRAKavhfSn154/H/D+3RhqFHc/' +
'/x51rgXFvgJ/DwYrr9g7JV9EQB15JvJJxazgnWftZE0W0u05Z7QNrIZQMG6LjcSjf0ep1zNYrJkf' +
'UYOfHNjXGfpmIfG0Y/cNhU1Zqv3ohv6EGWk4B7CdLjXEeDYqkJgIGA6Q4FQXM6PF7blXFQJ3papF' +
'lH0iO+ElK3LZVcql+QcVt2Ci+hwiKzsUvV5ydnHezyViTYTppjlZzju5SxxddQg+7CwGzX9O8ys1' +
'8dlbMFHD2ruPd4Zig9B1TEKHSdmQQGwITNufbSGixbuOZAbfMXP1oQqSzYkbbx2ye8ddISOr/753' +
'deLOwaQpy6tK9nb1wYwsfhpmZriWYDcKRfjkgr0srxnC2iDlMB0Do+GCLVVlmju9qcxeObWoxUaX' +
'TqecRW4fbpa9xAIH0tZlOpIyPgGfm3CXkiGOs/J/QJ4C4spqNpwppoXg6EAig7Y9GStQyEsHXZrj' +
'vLAefyaseybuMC+9okhx8VYM8esuE2GVTbCbWhn8ZTi8posQ+zabXvk7KE5zwGHDcvSGg0bYctJj' +
'V6pExLCp1vCUdP3iP06OCFMINDnGR7ZP4Da/atBUuB/F0LN//x+HfwhEUpVTG52L7f6Qjd/LhvU2' +
'f/zVfMKlw5xXwTjBu2X1oRYfhyYFhgnDECEi9iuRiVwwtnUU39r2XoaGcnMTPnZe62oy2jqTp3p+' +
'Y+klB9jUwPUg2t5IxptZ0D/H5flD+pEAAAAAYczECM+Nfu0AAfkF4wsAAEsSt/GxxGf7AgAAAAAE' +
'WVo=')
# Set up a dict of some constants and mappings
self.maps = {}
# Keylist modes
self.maps['keylist'] = {'local': gpg.constants.KEYLIST_MODE_LOCAL, # local keyring
'remote': gpg.constants.KEYLIST_MODE_EXTERN, # keyserver
# both - this is SUPPOSED to work, but doesn't seem to... it's unreliable at best?
'both': gpg.constants.KEYLIST_MODE_LOCAL|gpg.constants.KEYLIST_MODE_EXTERN}
# Validity/trust levels
self.maps['trust'] = {-1: ['never', gpg.constants.VALIDITY_NEVER], # this is... probably? not ideal, but. Never trust the key.
0: ['unknown', gpg.constants.VALIDITY_UNKNOWN], # The key's trust is unknown - typically because it hasn't been set yet.
1: ['untrusted', gpg.constants.VALIDITY_UNDEFINED], # The key is explicitly set to a blank trust
2: ['marginal', gpg.constants.VALIDITY_MARGINAL], # Trust a little.
3: ['full', gpg.constants.VALIDITY_FULL], # This is going to be the default for verified key ownership.
4: ['ultimate', gpg.constants.VALIDITY_ULTIMATE]} # This should probably only be reserved for keys you directly control.
# Validity/trust reverse mappings - see self.maps['trust'] for the meanings of these
# Used for fetching display/feedback
self.maps['rtrust'] = {gpg.constants.VALIDITY_NEVER: 'Never',
gpg.constants.VALIDITY_UNKNOWN: 'Unknown',
gpg.constants.VALIDITY_UNDEFINED: 'Untrusted',
gpg.constants.VALIDITY_MARGINAL: 'Marginal',
gpg.constants.VALIDITY_FULL: 'Full',
gpg.constants.VALIDITY_ULTIMATE: 'Ultimate'}
# Local signature and other binary (True/False) mappings
self.maps['binmap'] = {0: ['no', False],
1: ['yes', True]}
# Level of care taken when checking key ownership/valid identity
self.maps['check'] = {0: ['unknown', 0],
1: ['none', 1],
2: ['casual', 2],
3: ['careful', 3]}
# Default protocol/port mappings for keyservers
self.maps['proto'] = {'hkp': [11371, ['tcp', 'udp']], # Standard HKP protocol
'hkps': [443, ['tcp']], # Yes, same as https
'http': [80, ['tcp']], # HTTP (plaintext)
'https': [443, ['tcp']], # SSL/TLS
'ldap': [389, ['tcp', 'udp']], # Includes TLS negotiation since it runs on the same port
'ldaps': [636, ['tcp', 'udp']]} # SSL
self.maps['hashalgos'] = {gpg.constants.MD_MD5: 'md5',
gpg.constants.MD_SHA1: 'sha1',
gpg.constants.MD_RMD160: 'ripemd160',
gpg.constants.MD_MD2: 'md2',
gpg.constants.MD_TIGER: 'tiger192',
gpg.constants.MD_HAVAL: 'haval',
gpg.constants.MD_SHA256: 'sha256',
gpg.constants.MD_SHA384: 'sha384',
gpg.constants.MD_SHA512: 'sha512',
gpg.constants.MD_SHA224: 'sha224',
gpg.constants.MD_MD4: 'md4',
gpg.constants.MD_CRC32: 'crc32',
gpg.constants.MD_CRC32_RFC1510: 'crc32rfc1510',
gpg.constants.MD_CRC24_RFC2440: 'crc24rfc2440'}
# Now that all the static data's set up, we can continue.
self.args = self.verifyArgs(args) # Make the args accessible to all functions in the class - see docs/REF.args.struct.txt
# Get the GPGME context
try:
os.environ['GNUPGHOME'] = self.args['gpgdir']
self.ctx = gpg.Context()
except:
raise RuntimeError('Could not use {0} as a GnuPG home'.format(self.args['gpgdir']))
self.cfgdir = os.path.join(os.environ['HOME'], '.kant')
if not os.path.isdir(self.cfgdir):
print('No KANT configuration directory found; creating one at {0}...'.format(self.cfgdir))
os.makedirs(self.cfgdir, exist_ok = True)
self.keys = {} # See docs/REF.keys.struct.txt
self.mykey = {} # ""
self.tpls = {} # Email templates will go here
self.getTpls() # Build out self.tpls
return(None)
def getEditPrompt(self, key): # "key" should be the FPR of the primary key
# This mapping defines the default "answers" to the gpgme key editing.
# https://www.apt-browse.org/browse/debian/wheezy/main/amd64/python-pyme/1:0.8.1-2/file/usr/share/doc/python-pyme/examples/t-edit.py
# https://searchcode.com/codesearch/view/20535820/
# https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=blob;f=doc/DETAILS
# You can get the prompt identifiers and status indicators without grokking the source
# by first interactively performing the type of edit(s) you want to do with this command:
# gpg --status-fd 2 --command-fd 2 --edit-key <KEY_ID>
if key['trust'] >= gpg.constants.VALIDITY_FULL: # For tsigning, it only prompts for two trust levels:
_loctrust = 2 # "I trust fully"
else:
_loctrust = 1 # "I trust marginally"
# TODO: make the trust depth configurable. 1 is probably the safest, but we try to guess here.
# "Full" trust is a pretty big thing.
if key['trust'] >= gpg.constants.VALIDITY_FULL:
_locdepth = 2 # Allow +1 level of trust extension
else:
_locdepth = 1 # Only trust this key
_map = {'cmds': ['trust', 'fpr', 'sign', 'tsign', 'lsign', 'nrsign', 'grip', 'list', # Valid commands
'uid', 'key', 'check', 'deluid', 'delkey', 'delsig', 'pref', 'showpref',
'revsig', 'enable', 'disable', 'showphoto', 'clean', 'minimize', 'save',
'quit'],
'prompts': {'edit_ownertrust': {'value': str(key['trust']), # Pulled at time of call
'set_ultimate': {'okay': 'yes'}}, # If confirming ultimate trust, we auto-answer yes
'untrusted_key': {'override': 'yes'}, # We don't care if it's untrusted
'pklist': {'user_id': {'enter': key['pkey']['email']}}, # Prompt for a user ID - can we change this to key ID?
'sign_uid': {'class': str(key['check']), # The certification/"check" level
'okay': 'yes'}, # Are you sure that you want to sign this key with your key..."
'trustsig_prompt': {'trust_value': str(_loctrust), # This requires some processing; see above
'trust_depth': str(_locdepth), # The "depth" of the trust signature.
'trust_regexp': None}, # We can "Restrict" trust to certain domains, but this isn't really necessary.
'keyedit': {'prompt': 'trust', # Initiate trust editing
'save': {'okay': 'yes'}}}} # Save if prompted
return(_map)
def getTpls(self):
for t in ('plain', 'html'):
_tpl_file = os.path.join(self.cfgdir, 'email.{0}.j2'.format(t))
if os.path.isfile(_tpl_file):
with open(_tpl_file, 'r') as f:
self.tpls[t] = f.read()
else:
self.tpls[t] = lzma.decompress(base64.b64decode(email_tpl[t]),
format = lzma.FORMAT_XZ,
memlimit = None,
filters = None).decode('utf-8')
with open(_tpl_file, 'w') as f:
f.write('{0}'.format(self.tpls[t]))
print('Created: {0}'.format(tpl_file))
return(self.tpls)
def modifyDirmngr(self, op):
if not self.args['keyservers']:
return()
_pid = str(os.getpid())
_activecfg = os.path.join(self.args['gpgdir'], 'dirmngr.conf')
_activegpgconf = os.path.join(self.args['gpgdir'], 'gpg.conf')
_bakcfg = '{0}.{1}'.format(_activecfg, _pid)
_bakgpgconf = '{0}.{1}'.format(_activegpgconf, _pid)
## Modify files
if op in ('new', 'start', 'replace'):
# Replace the keyservers
if os.path.lexists(_activecfg):
shutil.copy2(_activecfg, _bakcfg)
with open(_bakcfg, 'r') as read, open(_activecfg, 'w') as write:
for line in read:
if not line.startswith('keyserver '):
write.write(line)
with open(_activecfg, 'a') as f:
for s in self.args['keyservers']:
_uri = '{0}://{1}:{2}'.format(s['proto'],
s['server'],
s['port'][0])
f.write('keyserver {0}\n'.format(_uri))
# Use stronger ciphers, etc. and prompt for check/certification levels
if os.path.lexists(_activegpgconf):
shutil.copy2(_activegpgconf, _bakgpgconf)
with open(_activegpgconf, 'w') as f:
f.write('cipher-algo AES256\ndigest-algo SHA512\ncert-digest-algo SHA512\ncompress-algo BZIP2\nask-cert-level\n')
## Restore files
if op in ('old', 'stop', 'restore'):
# Restore the keyservers
if os.path.lexists(_bakcfg):
with open(_bakcfg, 'r') as read, open(_activecfg, 'w') as write:
for line in read:
write.write(line)
os.remove(_bakcfg)
else:
os.remove(_activecfg)
# Restore GPG settings
if os.path.lexists(_bakgpgconf):
with open(_bakgpgconf, 'r') as read, open(_activegpgconf, 'w') as write:
for line in read:
write.write(line)
os.remove(_bakgpgconf)
else:
os.remove(_activegpgconf)
subprocess.run(['gpgconf', '--reload', 'dirmngr']) # I *really* wish we could do this via GPGME.
return()
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def getKeys(self):
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_keyids = []
_keys = {}
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# Do we have the key already? If not, fetch.
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for r in list(self.args['rcpts'].keys()):
if self.args['rcpts'][r]['type'] == 'fpr':
_keyids.append(r)
self.ctx.set_keylist_mode(self.maps['keylist']['remote'])
try:
_k = self.ctx.get_key(r)
except:
print('{0}: We could not find this key on the keyserver.'.format(r)) # Key not on server
del(self.args['rcpts'][r])
_keyids.remove(r)
continue
self.ctx.set_keylist_mode(self.maps['keylist']['local'])
_keys[r] = {'fpr': r,
'obj': _k,
'created': _k.subkeys[0].timestamp}
if 'T' in str(_keys[r]['created']):
_keys[r]['created'] = int(datetime.datetime.strptime(_keys[r]['created'],
'%Y%m%dT%H%M%S').timestamp())
if self.args['rcpts'][r]['type'] == 'email':
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# We need to actually do a lookup on the email address.
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_keytmp = []
for k in self.ctx.keylist(r, mode = self.maps['keylist']['remote']):
_keytmp.append(k)
for k in _keytmp:
_keys[k.fpr] = {'fpr': k.fpr,
'obj': k,
'created': k.subkeys[0].timestamp,
'uids': {}}
# Per the docs (<gpg>/docs/DETAILS, "*** Field 6 - Creation date"),
# they may change this to ISO 8601...
if 'T' in str(_keys[k.fpr]['created']):
_keys[k.fpr]['created'] = int(datetime.datetime.strptime(_keys[k.fpr]['created'],
'%Y%m%dT%H%M%S').timestamp())
for s in k.uids:
_keys[k.fpr]['uids'][s.email] = {'comment': s.comment,
'updated': s.last_update}
if len(_keytmp) > 1: # Print the keys and prompt for a selection.
print('\nWe found the following keys for {0} <{1}>...\n\nKEY ID:'.format(r, _orig_r))
for s in _keys[r]:
print(s, _keys[r])
print('{0}\n{1:6}(Generated at {2}) UIDs:'.format(k,
'',
datetime.datetime.utcfromtimestamp(s['updated'])))
for email in _keys[k]['uids']:
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print('{0:42}(Generated {3}) <{2}> {1}'.format('',
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s['uids'][email]['comment'],
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email,
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datetime.datetime.utcfromtimestamp(s['uids'][email]['updated'])))
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print()
while True:
key = input('Please enter the (full) appropriate key: ')
if key not in keys.keys():
print('Please enter a full key ID from the list above or hit ctrl-d to exit.')
else:
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_keyids.append(key)
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break
else:
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if len(_keytmp) == 0:
print('Could not find {0}!'.format(r))
del(self.args['rcpts'][r])
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continue
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_keyids.append(_keys[k.fpr]['fpr'])
print('\nFound key {0} for {1} (Generated at {2}):'.format(_keys[k.fpr]['fpr'],
r,
datetime.datetime.utcfromtimestamp(_keys[k.fpr]['created'])))
for email in _keys[k.fpr]['uids']:
print('\t(Generated {2}) {0} <{1}>'.format(_keys[k.fpr]['uids'][email]['comment'],
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email,
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datetime.datetime.utcfromtimestamp(_keys[k.fpr]['uids'][email]['updated'])))
print()
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## And now we can (FINALLY) fetch the key(s).
# TODO: replace with gpg.keylist_mode(gpgme.KEYLIST_MODE_EXTERN) and internal mechanisms?
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for g in _keyids:
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try:
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self.ctx.op_import_keys([_keys[g]['obj']])
except gpg.errors.GPGMEError:
print('Key {0} could not be found on the keyserver'.format(g)) # The key isn't on the keyserver
self.ctx.set_keylist_mode(self.maps['keylist']['local'])
for k in _keys:
_key = _keys[k]['obj']
self.keys[k] = {'pkey': {'email': _key.uids[0].email,
'name': _key.uids[0].name,
'creation': datetime.datetime.utcfromtimestamp(_keys[k]['created']),
'key': _key},
'trust': self.args['trustlevel'], # Not set yet; we'll modify this later in buildKeys().
'local': self.args['local'], # Not set yet; we'll modify this later in buildKeys().
'notify': self.args['notify'], # Same...
'sign': True, # We don't need to prompt for this since we detect if we need to sign or not
'change': None, # ""
'status': None} # Same.
# And we add the subkeys in yet another loop.
self.keys[k]['subkeys'] = {}
self.keys[k]['uids'] = {}
for s in _key.subkeys:
self.keys[k]['subkeys'][s.fpr] = datetime.datetime.utcfromtimestamp(s.timestamp)
for u in _key.uids:
self.keys[k]['uids'][u.email] = {'name': u.name,
'comment': u.comment,
'updated': datetime.datetime.utcfromtimestamp(u.last_update)}
del(_keys)
return()
def buildKeys(self):
self.getKeys()
# Before anything else, let's set up our own key info.
_key = self.ctx.get_key(self.args['sigkey'], secret = True)
self.mykey = {'pkey': {'email': _key.uids[0].email,
'name': _key.uids[0].name,
'creation': datetime.datetime.utcfromtimestamp(_key.subkeys[0].timestamp),
'key': _key},
'trust': 'ultimate', # No duh. This is our own key.
'local': False, # We keep our own key array separate, so we don't push it anyways.
'notify': False, # ""
'check': None, # ""
'change': False, # ""
'status': None, # ""
'sign': False} # ""
self.mykey['subkeys'] = {}
self.mykey['uids'] = {}
for s in _key.subkeys:
self.mykey['subkeys'][s.fpr] = datetime.datetime.utcfromtimestamp(s.timestamp)
for u in _key.uids:
self.mykey['uids'][u.email] = {'name': u.name,
'comment': u.comment,
'updated': datetime.datetime.utcfromtimestamp(u.last_update)}
# Now let's set up our trusts.
if self.args['batch']:
self.batchParse()
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else:
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for k in list(self.keys.keys()):
self.promptTrust(k)
self.promptCheck(k)
self.promptLocal(k)
self.promptNotify(k)
# In case we removed any keys, we have to run this outside of the loops
for k in list(self.keys.keys()):
for t in ('trust', 'local', 'check', 'notify'):
self.keysCleanup(k, t)
# TODO: populate self.keys[key]['change']; we use this for trust (but not sigs)
return()
def batchParse(self):
# First we grab the info from CSV
csvlines = csv.reader(self.csvraw, delimiter = ',', quotechar = '"')
for row in csvlines:
row[0] = row[0].replace('<', '').replace('>', '')
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try:
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if self.args['rcpts'][row[0]]['type'] == 'fpr':
k = row[0]
else: # It's an email.
key_set = False
while not key_set:
for i in list(self.keys.keys()):
if row[0] in list(self.keys[i]['uids'].keys()):
k = i
key_set = True
self.keys[k]['trust'] = row[1].lower().strip()
self.keys[k]['local'] = row[2].lower().strip()
self.keys[k]['check'] = row[3].lower().strip()
self.keys[k]['notify'] = row[4].lower().strip()
except KeyError:
continue # It was deemed to be an invalid key earlier
return()
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def promptTrust(self, k):
if 'trust' not in self.keys[k].keys() or not self.keys[k]['trust']:
trust_in = input(('\nWhat trust level should we assign to {0}? (The default is '+
'Marginal.)\n\t\t\t\t ({1} <{2}>)' +
'\n\n\t\033[1m-1 = Never\n\t 0 = Unknown\n\t 1 = Untrusted\n\t 2 = Marginal\n\t 3 = Full' +
'\n\t 4 = Ultimate\033[0m\nTrust: ').format(k,
self.keys[k]['pkey']['name'],
self.keys[k]['pkey']['email']))
if trust_in == '':
trust_in = 'marginal' # Has to be a str, so we can "pretend" it was entered
self.keys[k]['trust'] = trust_in
return()
def promptCheck(self, k):
if 'check' not in self.keys[k].keys() or self.keys[k]['check'] == None:
check_in = input(('\nHow carefully have you checked {0}\'s validity of identity/ownership of the key? ' +
'(Default is Unknown.)\n' +
'\n\t\033[1m0 = Unknown\n\t1 = None\n\t2 = Casual\n\t3 = Careful\033[0m\nCheck level: ').format(k))
if check_in == '':
check_in == 'unknown'
self.keys[k]['check'] = check_in
return()
def promptLocal(self, k):
if 'local' not in self.keys[k].keys() or self.keys[k]['local'] == None:
if self.args['keyservers']:
local_in = input(('\nShould we locally sign {0} '+
'(if yes, the signature will be non-exportable; if no, we will be able to push to a keyserver) ' +
'(Yes/\033[1mNO\033[0m)? ').format(k))
if local_in == '':
local_in = False
self.keys[k]['local'] = local_in
return()
def promptNotify(self, k):
if 'notify' not in self.keys[k].keys() or self.keys[k]['notify'] == None:
notify_in = input(('\nShould we notify {0} (via <{1}>) (\033[1mYES\033[0m/No)? ').format(k,
self.keys[k]['pkey']['email']))
if notify_in == '':
notify_in = True
self.keys[k]['local'] = local_in
return()
def keysCleanup(self, k, t): # At some point, this WHOLE thing would probably be cleaner with bitwise flags...
s = t
_errs = {'trust': 'trust level',
'local': 'local signature option',
'check': 'check level',
'notify': 'notify flag'}
if k not in self.keys.keys():
return() # It was deleted already.
if t in ('local', 'notify'): # these use a binary mapping
t = 'binmap'
# We can do some basic stuff right here.
if str(self.keys[k][s]).lower() in ('n', 'no', 'false'):
self.keys[k][s] = False
return()
elif str(self.keys[k][s]).lower() in ('y', 'yes', 'true'):
self.keys[k][s] = True
return()
# Make sure we have a known value. These will ALWAYS be str's, either from the CLI or CSV.
value_in = str(self.keys[k][s]).lower().strip()
for dictk, dictv in self.maps[t].items():
if value_in == dictv[0]:
self.keys[k][s] = int(dictk)
elif value_in == str(dictk):
self.keys[k][s] = int(dictk)
if not isinstance(self.keys[k][s], int): # It didn't get set
print('{0}: "{1}" is not a valid {2}; skipping. Run kant again to fix.'.format(k, self.keys[k][s], _errs[s]))
del(self.keys[k])
return()
return()
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def sigKeys(self): # The More Business-End(TM)
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# NOTE: If the trust level is anything but 2 (the default), we should use op_interact() instead and do a tsign.
self.ctx.keylist_mode = gpg.constants.KEYLIST_MODE_SIGS
_mkey = self.mykey['pkey']['key']
self.ctx.signers = [_mkey]
for k in list(self.keys.keys()):
key = self.keys[k]['pkey']['key']
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for uid in key.uids:
for s in uid.signatures:
try:
signerkey = ctx.get_key(s.keyid).subkeys[0].fpr
if signerkey == mkey.subkeys[0].fpr:
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self.trusts[k]['sign'] = False # We already signed this key
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except gpgme.GpgError:
pass # usually if we get this it means we don't have a signer's key in our keyring
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# And again, we loop. ALLLLL that buildup for one line.
for k in list(self.keys.keys()):
# TODO: configure to allow for user-entered expiration?
if self.keys[k]['sign']:
self.ctx.key_sign(self.keys[k]['pkey']['key'], local = self.keys[k]['local'])
return()
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class KeyEditor(object):
def __init__(self, optmap):
self.replied_once = False # This is used to handle the first prompt vs. the last
self.optmap = optmap
return(None)
def editKey(self, status, args, out):
_result = None
out.seek(0, 0)
def mapDict(m, d):
return(reduce(operator.getitem, m, d))
if args == 'keyedit.prompt' and self.replied_once:
_result = 'quit'
elif status == 'KEY_CONSIDERED':
_result = None
self.replied_once = False
elif status == 'GET_LINE':
self.replied_once = True
_ilist = args.split('.')
_result = mapDict(_ilist, self.optmap['prompts'])
if not _result:
_result = None
return(_result)
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def trustKeys(self): # The Son of Business-End(TM)
# TODO: add check for change
for k in list(self.keys.keys()):
_key = self.keys[k]
_map = self.getEditPrompt(_key)
out = gpg.Data()
self.ctx.interact(_key['pkey']['key'], self.KeyEditor(_map).editKey, sink = out, fnc_value = out)
out.seek(0, 0)
return()
def pushKeys(self): # The Last Business-End(TM)
for k in list(self.keys.keys()):
if not self.keys[k]['local'] and self.keys[k]['sign']:
self.ctx.op_export(k, gpg.constants.EXPORT_MODE_EXTERN, None)
return()
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class Mailer(object): # I lied; The Return of the Business-End(TM)
def __init__(self):
_homeconf = os.path.join(os.environ['HOME'], '.msmtprc')
_sysconf = '/etc/msmtprc'
self.msmtp = {'path': None}
if not os.path.isfile(_homeconf):
if not os.path.isfile(_sysconf):
self.msmtp['conf'] = False
else:
self.msmtp['conf'] = _sysconf
else:
self.msmtp['conf'] = _homeconf
if os.path.isfile(self.msmtp['conf']):
for p in (os.environ['PATH']).split(':'):
if os.path.isfile(os.path.join(p, 'msmtp')):
self.msmtp['path'] = os.path.join(p, 'msmtp')
if self.msmtp['path']:
# Okay. So we have a config file, which we're assuming to be set up correctly, and a path to a binary.
# Now we need to parse the config.
self.msmtp['cfg'] = self.getCfg()
return(None)
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def getCfg(self):
cfg = {'default': None, 'defaults': {}}
_defaults = False
_acct = None
with open(self.msmtp['conf'], 'r') as f:
_cfg_raw = f.read()
for l in _cfg_raw.splitlines():
if re.match('^\s?(#.*|)$', l):
continue # Skip over blank and commented lines
_line = [i.strip() for i in re.split('\s+', l.strip(), maxsplit = 1)]
if _line[0] == 'account':
if re.match('^default\s?:\s?', _line[1]): # it's the default account specifier
cfg['default'] = _line[1].split(':', maxsplit = 1)[1].strip()
else:
if _line[1] not in cfg.keys(): # it's a new account definition
cfg[_line[1]] = {}
_acct = _line[1]
_defaults = False
elif _line[0] == 'defaults': # it's the defaults
_acct = 'defaults'
else: # it's a config directive
cfg[_acct][_line[0]] = _line[1]
for a in list(cfg):
if a != 'default':
for k, v in cfg['defaults'].items():
if k not in cfg[a].keys():
cfg[a][k] = v
del(cfg['defaults'])
return(cfg)
def sendEmail(self, msg, key, profile): # This needs way more parsing to support things like plain ol' port 25 plaintext (ugh), etc.
if 'tls-starttls' in self.msmtp['cfg'][profile].keys() and self.msmtp['cfg'][profile]['tls-starttls'] == 'on':
smtpserver = smtplib.SMTP(self.msmtp['cfg'][profile]['host'], int(self.msmtp['cfg'][profile]['port']))
smtpserver.ehlo()
smtpserver.starttls()
# we need to EHLO twice with a STARTTLS because email is weird.
elif self.msmtp['cfg'][profile]['tls'] == 'on':
smtpserver = smtplib.SMTP_SSL(self.msmtp['cfg'][profile]['host'], int(self.msmtp['cfg'][profile]['port']))
smtpserver.ehlo()
smtpserver.login(self.msmtp['cfg'][profile]['user'], self.msmtp['cfg'][profile]['password'])
smtpserver.sendmail(self.msmtp['cfg'][profile]['user'], key['pkey']['email'], msg.as_string())
smtpserver.close()
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return()
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def postalWorker(self):
m = self.Mailer()
if 'KANT' in m.msmtp['cfg'].keys():
_profile = 'KANT'
else:
_profile = m.msmtp['cfg']['default'] # TODO: let this be specified on the CLI args?
if 'user' not in m.msmtp['cfg'][_profile].keys() or not m.msmtp['cfg'][_profile]['user']:
return() # We don't have MSMTP configured.
# Reconstruct the keyserver list.
_keyservers = []
for k in self.args['keyservers']:
_keyservers.append('{0}://{1}:{2}'.format(k['proto'], k['server'], k['port'][0]))
# Export our key so we can attach it.
_pubkeys = {}
for e in ('asc', 'gpg'):
if e == 'asc':
self.ctx.armor = True
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else:
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self.ctx.armor = False
_pubkeys[e] = gpg.Data() # This is a data buffer to store your ASCII-armored pubkeys
self.ctx.op_export_keys([self.mykey['pkey']['key']], 0, _pubkeys[e])
_pubkeys[e].seek(0, 0) # Read with e.g. _sigs['asc'].read()
for k in list(self.keys.keys()):
if self.keys[k]['notify']:
_body = {}
for t in list(self.tpls.keys()):
# There's gotta be a more efficient way of doing this...
#_tplenv = jinja2.Environment(loader = jinja2.BaseLoader()).from_string(self.tpls[t])
_tplenv = jinja2.Environment().from_string(self.tpls[t])
_body[t] = _tplenv.render(key = self.keys[k],
mykey = self.mykey,
keyservers = _keyservers)
b = MIMEMultipart('alternative') # Set up a body
for c in _body.keys():
b.attach(MIMEText(_body[c], c))
bmsg = MIMEMultipart()
bmsg.attach(b)
for s in _pubkeys.keys():
_attchmnt = MIMEApplication(_pubkeys[s].read(), '{0}.{1}'.format(self.mykey['pkey']['key'].fpr, s))
_attchmnt['Content-Disposition'] = 'attachment; filename="{0}.{1}"'.format(self.mykey['pkey']['key'].fpr, s)
bmsg.attach(_attchmnt)
# Now we sign the body. This incomprehensible bit monkey-formats bmsg to be a multi-RFC-compatible
# string, which is then passed to our gpgme instance's signing mechanishm, and the output of that is
# returned as plaintext. Whew.
self.ctx.armor = True
_sig = self.ctx.sign((bmsg.as_string().replace('\n', '\r\n')).encode('utf-8'),
mode = gpg.constants.SIG_MODE_DETACH)
imsg = Message() # Build yet another intermediate message...
imsg['Content-Type'] = 'application/pgp-signature; name="signature.asc"'
imsg['Content-Description'] = 'OpenPGP digital signature'
imsg.set_payload(_sig[0].decode('utf-8'))
msg = MIMEMultipart(_subtype = 'signed',
micalg = "pgp-{0}".format(self.maps['hashalgos'][_sig[1].signatures[0].hash_algo]),
protocol = 'application/pgp-signature')
msg.attach(bmsg) # Attach the body (plaintext, html, pubkey attachmants)
msg.attach(imsg) # Attach the isignature
msg['To'] = self.keys[k]['pkey']['email']
if 'from' in m.msmtp['cfg'][_profile].keys():
msg['From'] = m.msmtp['cfg'][_profile]['from']
else:
msg['From'] = self.mykey['pkey']['email']
msg['Subject'] = 'Your GnuPG/PGP key has been signed'
msg['Openpgp'] = 'id={0}'.format(self.mykey['pkey']['key'].fpr)
msg['Date'] = datetime.datetime.now().strftime('%a, %d %b %Y %H:%M:%S %z')
msg['User-Agent'] = 'KANT (part of the r00t^2 OpTools suite: https://git.square-r00t.net/OpTools)'
m.sendEmail(msg, self.keys[k], _profile) # Send the email
for d in (msg, imsg, bmsg, b, _body, _tplenv): # Not necessary, but it pays to be paranoid; we do NOT want leaks.
del(d)
del(m)
return()
def saveResults(self):
_cachedir = os.path.join(self.cfgdir, 'cache', datetime.datetime.utcnow().strftime('%Y.%m.%d_%H.%M.%S'))
os.makedirs(_cachedir, exist_ok = True)
for k in self.keys.keys():
_keyout = self.keys[k]
# We need to normalize the datetime objects and gpg objects to strings
_keyout['pkey']['creation'] = str(self.keys[k]['pkey']['creation'])
_keyout['pkey']['key'] = '<GPGME object>'
for u in list(_keyout['uids'].keys()):
_keyout['uids'][u]['updated'] = str(self.keys[k]['uids'][u]['updated'])
for s in list(_keyout['subkeys'].keys()):
_keyout['subkeys'][s] = str(self.keys[k]['subkeys'][s])
_fname = os.path.join(_cachedir, '{0}.json'.format(k))
with open(_fname, 'a') as f:
f.write('{0}\n'.format(json.dumps(_keyout, sort_keys = True, indent = 4)))
del(_keyout)
# And let's grab a copy of our key in the state that it exists in currently
_mykey = self.mykey
# We need to normalize the datetime objects and gpg objects to strings again
_mykey['pkey']['creation'] = str(_mykey['pkey']['creation'])
_mykey['pkey']['key'] = '<GPGME object>'
for u in list(_mykey['uids'].keys()):
_mykey['uids'][u]['updated'] = str(self.mykey['uids'][u]['updated'])
for s in list(_mykey['subkeys'].keys()):
_mykey['subkeys'][s] = str(self.mykey['subkeys'][s])
with open(os.path.join(_cachedir, '_SIGKEY.json'), 'w') as f:
f.write('{0}\n'.format(json.dumps(_mykey, sort_keys = True, indent = 4)))
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return()
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def serverParser(self, uri):
# https://en.wikipedia.org/wiki/Key_server_(cryptographic)#Keyserver_examples
_server = {}
_urlobj = urllib.parse.urlparse(uri)
_server['proto'] = _urlobj.scheme
_lazy = False
if not _server['proto']:
_server['proto'] = 'hkp' # Default
_server['server'] = _urlobj.hostname
if not _server['server']:
_server['server'] = re.sub('^([A-Za-z]://)?(.+[^:][^0-9])(:[0-9]+)?$', '\g<2>', uri, re.MULTILINE)
_lazy = True
_server['port'] = _urlobj.port
if not _server['port']:
if _lazy:
_p = re.sub('.*:([0-9]+)$', '\g<1>', uri, re.MULTILINE)
_server['port'] = self.maps['proto'][_server['proto']] # Default
return(_server)
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def verifyArgs(self, locargs):
## Some pythonization...
if not locargs['batch']:
locargs['keys'] = [re.sub('\s', '', k) for k in locargs['keys'].split(',')]
else:
## Batch file
_batchfilepath = os.path.abspath(os.path.expanduser(locargs['keys']))
if not os.path.isfile(_batchfilepath):
raise ValueError('{0} does not exist or is not a regular file.'.format(_batchfilepath))
else:
with open(_batchfilepath, 'r') as f:
self.csvraw = f.readlines()
locargs['keys'] = _batchfilepath
locargs['keyservers'] = [re.sub('\s', '', s) for s in locargs['keyservers'].split(',')]
locargs['keyservers'] = [self.serverParser(s) for s in locargs['keyservers']]
## Key(s) to sign
locargs['rcpts'] = {}
if not locargs['batch']:
_keyiter = locargs['keys']
else:
_keyiter = []
for row in csv.reader(self.csvraw, delimiter = ',', quotechar = '"'):
_keyiter.append(row[0])
for k in _keyiter:
locargs['rcpts'][k] = {}
try:
int(k, 16)
_ktype = 'fpr'
except: # If it isn't a valid key ID...
if not re.match('^<?[\w\.\+\-]+\@[\w-]+\.[a-z]{2,3}>?$', k): # is it an email address?
raise ValueError('{0} is not a valid email address'.format(k))
else:
r = k.replace('<', '').replace('>', '')
locargs['rcpts'][r] = locargs['rcpts'][k]
del(locargs['rcpts'][k])
k = r
_ktype = 'email'
locargs['rcpts'][k]['type'] = _ktype
# Security is important. We don't want users getting collisions, so we don't allow shortened key IDs.
if _ktype == 'fpr' and not len(k) == 40:
raise ValueError('{0} is not a full 40-char key ID or key fingerprint'.format(k))
## Signing key
if not locargs['sigkey']:
raise ValueError('A key for signing is required') # We need a key we can sign with.
else:
if not os.path.lexists(locargs['gpgdir']):
raise FileNotFoundError('{0} does not exist'.format(locargs['gpgdir']))
elif os.path.isfile(locargs['gpgdir']):
raise NotADirectoryError('{0} is not a directory'.format(locargs['gpgdir']))
# Now we need to verify that the private key exists...
try:
_ctx = gpg.Context()
_sigkey = _ctx.get_key(locargs['sigkey'], True)
except gpg.errors.GPGMEError or gpg.errors.KeyNotFound:
raise ValueError('Cannot use key {0}'.format(locargs['sigkey']))
# And that it is an eligible candidate to use to sign.
if not _sigkey.can_sign or True in (_sigkey.revoked, _sigkey.expired, _sigkey.disabled):
raise ValueError('{0} is not a valid candidate for signing'.format(locargs['sigkey']))
## Keyservers
if locargs['testkeyservers']:
for s in locargs['keyservers']:
# Test to make sure the keyserver is accessible.
_v6test = socket(AF_INET6, SOCK_DGRAM)
try:
_v6test.connect(('ipv6.square-r00t.net', 0))
_nettype = AF_INET6 # We have IPv6 intarwebz
except:
_nettype = AF_INET # No IPv6, default to IPv4
for _proto in locargs['keyservers'][s]['port'][1]:
if _proto == 'udp':
_netproto = SOCK_DGRAM
elif _proto == 'tcp':
_netproto = SOCK_STREAM
_sock = socket(nettype, netproto)
_sock.settimeout(10)
_tests = _sock.connect_ex((locargs['keyservers'][s]['server'],
int(locargs['keyservers'][s]['port'][0])))
_uristr = '{0}://{1}:{2} ({3})'.format(locargs['keyservers'][s]['proto'],
locargs['keyservers'][s]['server'],
locargs['keyservers'][s]['port'][0],
_proto.upper())
if not tests == 0:
raise OSError('Keyserver {0} is not available'.format(_uristr))
else:
print('Keyserver {0} is accepting connections.'.format(_uristr))
sock.close()
return(locargs)
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def parseArgs():
def getDefGPGDir():
try:
gpgdir = os.environ['GNUPGHOME']
except KeyError:
try:
homedir = os.environ['HOME']
gpgdchk = os.path.join(homedir, '.gnupg')
except KeyError:
# There is no reason that this should ever get this far, but... edge cases be crazy.
gpgdchk = os.path.join(os.path.expanduser('~'), '.gnupg')
if os.path.isdir(gpgdchk):
gpgdir = gpgdchk
else:
gpgdir = None
return(gpgdir)
def getDefKey(defgpgdir):
os.environ['GNUPGHOME'] = defgpgdir
if not defgpgdir:
return(None)
defkey = None
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ctx = gpg.Context()
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for k in ctx.keylist(None, secret = True): # "None" is query string; this grabs all keys in the private keyring
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if k.can_sign and True not in (k.revoked, k.expired, k.disabled):
defkey = k.subkeys[0].fpr
break # We'll just use the first primary key we find that's valid as the default.
return(defkey)
def getDefKeyservers(defgpgdir):
srvlst = [None]
# We don't need these since we use the gpg agent. Requires GPG 2.1 and above, probably.
#if os.path.isfile(os.path.join(defgpgdir, 'dirmngr.conf')):
# pass
dirmgr_out = subprocess.run(['gpg-connect-agent', '--dirmngr', 'keyserver', '/bye'], stdout = subprocess.PIPE)
for l in dirmgr_out.stdout.decode('utf-8').splitlines():
#if len(l) == 3 and l.lower().startswith('s keyserver'): # It's a keyserver line
if l.lower().startswith('s keyserver'): # It's a keyserver line
s = l.split()[2]
if len(srvlst) == 1 and srvlst[0] == None:
srvlst = [s]
else:
srvlst.append(s)
return(','.join(srvlst))
defgpgdir = getDefGPGDir()
defkey = getDefKey(defgpgdir)
defkeyservers = getDefKeyservers(defgpgdir)
args = argparse.ArgumentParser(description = 'Keysigning Assistance and Notifying Tool (KANT)',
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epilog = 'brent s. || 2017 || https://square-r00t.net')
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args.add_argument('-k',
'--keys',
dest = 'keys',
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metavar = 'KEYS | /path/to/batchfile',
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required = True,
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help = 'A single/comma-separated list of keys to sign, ' +
'trust, & notify. Can also be an email address. ' +
'If -b/--batch is specified, this should instead be ' +
'a path to the batch file. See the man page for more info.')
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args.add_argument('-K',
'--sigkey',
dest = 'sigkey',
default = defkey,
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help = 'The key to use when signing other keys. Default is \033[1m{0}\033[0m.'.format(defkey))
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args.add_argument('-t',
'--trust',
dest = 'trustlevel',
default = None,
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help = 'The trust level to automatically apply to all keys ' +
'(if not specified, kant will prompt for each key). ' +
'See BATCHFILE/TRUSTLEVEL in the man page for trust ' +
'level notations.')
args.add_argument('-c',
'--check',
dest = 'checklevel',
default = None,
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help = 'The level of checking done (if not specified, kant will ' +
'prompt for each key). See -b/--batch for check level notations.')
args.add_argument('-l',
'--local',
dest = 'local',
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default = None,
help = 'Make the signature(s) local-only (i.e. don\'t push to a keyserver).')
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args.add_argument('-n',
'--no-notify',
dest = 'notify',
action = 'store_false',
help = 'If specified, do NOT notify any key recipients that you\'ve signed ' +
'their key, even if KANT is able to.')
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args.add_argument('-s',
'--keyservers',
dest = 'keyservers',
default = defkeyservers,
help = 'The comma-separated keyserver(s) to push to.\n' +
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'Default keyserver list is: \n\n\t\033[1m{0}\033[0m\n\n'.format(re.sub(',',
'\n\t',
defkeyservers)))
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args.add_argument('-b',
'--batch',
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dest = 'batch',
action = 'store_true',
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help = 'If specified, -k/--keys is a CSV file to use as a ' +
'batch run. See the BATCHFILE section in the man page for more info.')
args.add_argument('-D',
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'--gpgdir',
dest = 'gpgdir',
default = defgpgdir,
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help = 'The GnuPG configuration directory to use (containing\n' +
'your keys, etc.); default is \033[1m{0}\033[0m.'.format(defgpgdir))
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args.add_argument('-T',
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'--testkeyservers',
dest = 'testkeyservers',
action = 'store_true',
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help = 'If specified, initiate a test connection with each\n'
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'set keyserver before anything else. Disabled by default.')
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return(args)
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def main():
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# This could be cleaner-looking, but we do it this way so the class can be used externally
# with a dict instead of an argparser result.
args = vars(parseArgs().parse_args())
sess = SigSession(args)
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sess.modifyDirmngr('new')
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sess.buildKeys()
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sess.sigKeys()
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sess.trustKeys()
sess.pushKeys()
sess.postalWorker()
sess.saveResults()
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sess.modifyDirmngr('old')
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if __name__ == '__main__':
main()