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Comrad/komrade/backend/komrades.py
quadrismegistus e729cfe5e7 updates
2020-09-15 11:29:13 +01:00

575 lines
17 KiB
Python

import os,sys; sys.path.append(os.path.abspath(os.path.join(os.path.abspath(os.path.join(os.path.dirname(__file__),'..')),'..')))
from komrade import *
from komrade.backend import *
from komrade.backend.keymaker import *
class KomradeX(Caller):
def __init__(self, name=None, pubkey=None):
super().__init__(name=name)
# self.log(f'booted komrade with {name} and {passphrase} and\n\n{dict_format(self.keychain())}')
# if SHOW_STATUS:
# from komrade.cli import CLI
# self.cli = CLI(name=name, komrade=self)
self.boot(create=False)
# self.name=name
# pass
def boot(self,create=False,ping=False):
# Do I already have my keys?
# yes? -- login
keys = self.keychain()
# self.log(f'booting {self}!',dict_format(keys))
if keys.get('pubkey') and keys.get('privkey'):
# self.log('already booted! @'+self.name)
return True
if self.exists_locally_as_account():
self.log(f'this account (@{self.name}) can be logged into')
return self.login()
elif self.exists_locally_as_contact():
self.log(f'this account (@{self.name}) is a contact')
return #pass #???
elif ping and self.exists_on_server():
self.log(f'this account exists on server. introduce?')
return
elif create:
self.log('account is free: register?')
return self.register()
def exists_locally(self):
return bool(self.pubkey)
def exists_locally_as_contact(self):
return bool(self.pubkey) and not bool(self.privkey)
def exists_locally_as_account(self):
return bool(self.pubkey) and bool(self.privkey_encr)
def exists_on_server(self):
answer = self.phone.ring_ring({
'_route':'does_username_exist',
'name':self.name
})
self.log('answer??',answer)
return answer
# login?
# def login(self):
# if keys.get('pubkey') and keys.get('privkey')
def register(self, name = None, passphrase = None, is_group=None, show_intro=0,show_body=True):
# global PHONEBOOK
# print('got name:',name)
## Defaults
if name and not self.name: self.name=name
if not name and self.name: name=self.name
# if not name and not self.name: name=''
# print('got name',name)
# already have it?
if self.exists_locally_as_account():
return {'success':False, 'status':'You have already created this account.'}
if self.exists_locally_as_contact():
return {'success':False, 'status':'This is already a contact of yours'}
## 1) Have name?
tolog=''
if SHOW_STATUS and show_intro:
self.name = name = self.cli.status_keymaker_part1(name)
elif not name:
self.name = name = input('\nHello, this is Komrade @')
print('\nI would like to sign up for the socialist network revolution.',flush=True)
do_pause()
else:
print(f'Hello, this is Komrade @{name}.\n\nI would like to sign up for the socialist network revolution.')
do_pause()
clear_screen()
self.log(f'@Keymaker: Excellent. But to communicate with komrades securely,\nyou must first cut your public & private encryption keys. ')
# do_pause()
## 2) Make pub public/private keys
keypair = KomradeAsymmetricKey()
pubkey,privkey = keypair.pubkey_obj,keypair.privkey_obj
self.log(f'@Keymaker: I have cut for you a private and public asymmetric key pair\nusing the Elliptic Curve algorithm from Themis cryptography library:\n\n(1) {pubkey}\n\n(2) {privkey}{ART_KEY_PAIR}',clear=False,pause=True)
## 3) Have passphrase?
if SHOW_STATUS and not passphrase:
passphrase = self.cli.status_keymaker_part2(name,passphrase,pubkey,privkey,hasher,self)
else:
if not passphrase: passphrase = DEBUG_DEFAULT_PASSPHRASE
while not passphrase:
passphrase=getpass(f'@Keymaker: Enter a memorable password to encrypt your private key with: \n\n@{self.name}: ')
clear_screen()
## 4) Get hashed password
passhash = hasher(passphrase)
self.log(f'''@Keymaker: I have replaced your password with a disguised, hashed version\nusing a salted SHA-256 algorithm from python's hashlib:\n\n\t{make_key_discreet_str(passhash)}''')
## 5) Encrypt private key
privkey_decr = KomradeSymmetricKeyWithPassphrase(passphrase)
privkey_encr = privkey_decr.encrypt(privkey.data)
privkey_encr_obj = KomradeEncryptedAsymmetricPrivateKey(privkey_encr)
self.log(f"@Keymaker: Store your private key on your device hardware ONLY\nas it was encrypted by your password-generated key:\n\n[Encrypted Private Key]\n({make_key_discreet_str(privkey_encr_obj.data_b64)})")
## 6) Test keychain works
#privkey_decr2 = KomradeSymmetricKeyWithPassphrase(passphrase)
#assert privkey_decr2.decrypt(privkey_encr) == privkey.data
self._keychain['pubkey']=pubkey
self._keychain['privkey_encr']=privkey_encr_obj
self._keychain['privkey']=privkey
# self._keychain['privkey_decr']=privkey_decr
# we should be able to reassemble privkey now?
# self.log('this is my keychain now:')
#assert 'privkey' in self.keychain()
self.log('My keychain now looks like:',dict_format(self.keychain()))
# More narration?
if SHOW_STATUS: self.cli.status_keymaker_part3(privkey,privkey_decr,privkey_encr,passphrase)
# 6) Save for now on client -- will delete if fails on server
# storing myself in memory phonebook
# PHONEBOOK[name]=self
## 7) Save data to server
data = {
'name':name,
'pubkey': pubkey.data,
}
self.log('@Keymaker: Store your public key both on your device hardware\nas well as register it with Komrade @Operator on the remote server:\n\n',dict_format(data,tab=2))
# ring operator
# call from phone since I don't have pubkey on record on Op yet
# self.log('my keychain:',self._keychain,pubkey,self.op._keychain)
resp_msg_d = self.ring_ring(
{
'name':name,
'pubkey': pubkey.data,
},
route='register_new_user'
)
if not resp_msg_d.get('success'):
self.log(f'Registration failed. Message from operator was:\n\n{dict_format(resp_msg_d)}')
return
# otherwise, save things on our end
self.log(f'Registration successful. Message from operator was:\n\n{dict_format(resp_msg_d)}')
self.name=resp_msg_d.get('name')
pubkey_b = resp_msg_d.get('pubkey')
assert pubkey_b == pubkey.data
uri_id = pubkey.data_b64
sec_login = resp_msg_d.get('secret_login')
self.log(f'''Now saving name and public key on local device:''')
self.crypt_keys.set(name, pubkey_b, prefix='/pubkey/')
self.crypt_keys.set(uri_id, name, prefix='/name/')
self.crypt_keys.set(uri_id,sec_login,prefix='/secret_login/')
# store privkey pieces
self.crypt_keys.set(uri_id, privkey_encr_obj.data, prefix='/privkey_encr/')
# just to show we used a passphrase -->
self.crypt_keys.set(uri_id, KomradeSymmetricKeyWithPassphrase.__name__, prefix='/privkey_decr/')
# save qr too:
self.save_uri_as_qrcode(uri_id)
# self.log(f'saved public key as QR code to:\n {fnfn}\n\n{qr_str}')
return resp_msg_d
# done!
self.log(f'Congratulations. Welcome, Komrade {self}.')
@property
def secret_login(self):
return self.crypt_keys.get(
self.pubkey.data_b64,
prefix='/secret_login/'
)
def login(self,passphrase=None):
# what keys do I have?
keys = self.keychain()
# self.log('here are my keys:',dict_format(keys))
# check hardware
if not 'pubkey' in keys:
emsg='''Login impossible. I do not have this komrade's public key, much less private one.'''
# self.log()
return {'success':False, 'status':emsg}
if not 'privkey_encr' in keys:
emsg='''Login impossible. I do not have this komrade's private key on this hardware.'''
self.log(emsg)
return {'success':False, 'status':emsg}
if not 'privkey' in keys:
emsg='''Login failed. Private key did not unlock from passphrase.'''
return {'success':False, 'status': emsg}
# compose message
msg = {
'name':self.name,
'pubkey':keys['pubkey'].data,
'secret_login':self.secret_login
}
# ask operator and get response
resp_msg = self.ring_ring(
msg,
route='login'
)
# get result
self.log('Got result back from operator:',resp_msg)
return resp_msg
## MEETING PEOPLE
def find(self,someone):
if type(someone)==str:
return Komrade(name=someone)
if type(someone)==bytes:
return Komrade(pubkey=someone)
self.log('what is type of someoen here?',type(someone))
return someone
def meet(self,someone):
# get person obj
someone = self.find(someone)
self.log('got someone =',someone,type(someone))
def contacts(self):
# who do I know?
return sorted([fn.split('.png')[0] for fn in os.listdir(PATH_QRCODES)])
def ring_ring(self,msg,route=None,**y):
if type(msg)==dict and not ROUTE_KEYNAME in msg:
msg[ROUTE_KEYNAME]=route
return super().ring_ring(msg,caller=self,**y)
def msg(self,someone,something):
# find or boot
someone = Komrade(someone)
self.log(f'found {someone}')
# can we?
if not someone.pubkey:
self.log(f'''Don't know the public key of {someone}!''')
msg_obj = self.compose_msg_to(
something,
someone
)
self.log('composed msg:',msg_obj)
# encrypting
msg_obj.encrypt()
# attaching
direct_msg_data = msg_obj.msg
self.log('going to send only this to op:',direct_msg_data)
# enclosing
msg_to_op = {
'deliver_from':self.pubkey.data_b64,
'deliver_from_name':self.name,
'deliver_to':someone.pubkey.data_b64,
'deliver_to_name':someone.name,
'deliver_msg':direct_msg_data,
}
self.log('going to send msg to op?',msg_to_op)
return self.ring_ring(
msg_to_op,
route='deliver_msg'
)
def check_msgs(self,inbox=None):
if not self.pubkey and self.privkey:
return {'success':False,'status':'Need to be logged in'}
# checking my own mail I presume?
if not inbox:
inbox=self.pubkey.data_b64
# send info op needs
msg = {
'secret_login':self.secret_login,
'name':self.name,
'pubkey':self.uri,
'inbox':inbox
}
self.log('sending msg to op:',msg)
res = self.ring_ring(msg,route='check_msgs')
self.log('got back response:',res)
# decrypt?
if not res.get('data_encr'):
return {'success':False, 'status':'No data'}
inbox_encr = res['data_encr']
# overwrite my local inbox with encrypted one from op?
self.crypt_keys.set(
self.uri,
inbox_encr,
prefix='/inbox/',
override=True
)
def refresh(self):
# refresh inbox
self.check_msgs()
# status?
inbox_status = self.get_inbox_ids()
if not inbox_status['success']: return inbox_status
unread=inbox_status.get('unread',[])
inbox=inbox_status.get('inbox',[])
# download new messages
self.download_msgs(post_ids = unread)
return {
'success':True,
'status':'Messages refreshed',
'unread':unread,
'inbox':inbox
}
def inbox(self,topn=100,only_unread=False):
# refreshing inbox
res = self.refresh()
if not res['success']: return res
boxname = 'inbox' if not only_unread else 'unread'
post_ids = res[boxname]
msgs=[]
for post_id in post_ids:
try:
msg = self.read_msg(post_id)
except ThemisError as e:
self.log(f'!! Could not decrypt post {post_id}')
continue
if not msg.from_name or not msg.from_pubkey:
self.log('!! Invalid sender info!')
continue
msgs.append(msg)
if len(msgs)>=topn: break
# print('!!',post_id,msg.from_whom, msg.to_whom, msg.from_whom is self)
return msgs
# return all messages read?
def get_inbox_ids(self):
inbox_encr = self.crypt_keys.get(
self.uri,
prefix='/inbox/',
)
# decrypt inbox?
inbox = SMessage(
self.privkey.data,
self.op.pubkey.data
).unwrap(inbox_encr)
self.log('inbox decrypted:',inbox)
# find the unread ones
unread = []
inbox = inbox.split(BSEP)
for post_id in inbox:
if not post_id: continue
if not self.crypt_keys.get(post_id,prefix='/post/'):
unread.append(post_id)
self.log(f'I {self} have {len(unread)} new messages')
return {
'success':True,
'status':'Inbox retrieved.',
'unread':unread,
'inbox':inbox
}
def read_msg(self,post_id):
# get post
post_encr = self.crypt_keys.get(post_id,prefix='/post/')
if not post_encr:
return {
'success':False,
'status':'Post not found.'
}
self.log('found encrypted post store:',post_encr)
# self.log('unpickling?',pickle.loads(post_encr))
# it should be twice decrypted
msg_op2me_obj = Message(
from_whom=self.op,
to_whom=self,
msg=post_encr
)
self.log('assuming this is the message:',msg_op2me_obj)
# decrypt
msg_op2me_obj.decrypt()
# dict to/from/msg
msg_op2me = msg_op2me_obj.msg.msg_d
self.log('msg_op2me is now',msg_op2me)
# this really to me?
assert msg_op2me.get('to') == self.uri
# now try to decrypt?
msg2me = Message(
to_whom=self,
msg_d={
'from':msg_op2me.get('from'),
'from_name':msg_op2me.get('from_name'),
'msg': msg_op2me.get('msg')
}
)
# self.log('msg2me is now v1',msg2me)
msg2me.decrypt()
self.log('msg2me is now v2',dict_format(msg2me.msg_d))
return msg2me
def download_msgs(self,post_ids=[],inbox=None):
if not post_ids:
# get unerad
post_ids = self.get_inbox_ids().get('unread',[])
if not post_ids:
return {'success':False,'status':'No messages requested'}
# ask Op for them
res = self.ring_ring(
{
'secret_login':self.secret_login,
'name':self.name,
'pubkey':self.uri,
'post_ids':post_ids,
},
route='download_msgs'
)
self.log('got back from op!',res)
if not 'data_encr' or not res['data_encr'] or type(res['data_encr'])!=dict:
return {'success':False, 'status':'No valid data returned.'}
# store -- encrypted!
posts_downloaded = []
for post_id,post_encr in res['data_encr'].items():
# print('storing...',post_id)
self.crypt_keys.set(
post_id,
post_encr,
prefix='/post/'
)
posts_downloaded.append(post_id)
return {
'success':True,
'status':'Messages downloaded',
'downloaded':posts_downloaded,
}
def test_register():
import random
num = random.choice(list(range(0,1000)))
botname=f'marx{str(num).zfill(3)}'
marxbot = Komrade(botname)
# marxbot=Komrade()
marxbot.register(passphrase='boo')
def test_msg():
b = Komrade('bez')
b.inbox()
# b.read_msg(b'YWY3NDUxZjNjYjdhNDFmNmIyNDI2NzU3YTI4ZTA0OWM=')
#b.login()
#print(b.download_msgs())
# z = Komrade('zuckbot')
# b.msg(z,'you ssssssuck')
def test_loading():
z1 = Komrade('elon')
# z1.register()
print(z1.keychain())
# exit()
z2 = Komrade(b'VUVDMgAAAC08BCMVA+0dMJXc66/W7hty669+3/3S61Q1yjmgJW8I0k3lqfDi')
print(z2)
print(z2.keychain())
pprint(PHONEBOOK)
return
# z1.login()
def test_sign():
from pythemis import smessage
b = Komrade('bez')
m = Komrade('marx')
z = Komrade('zuckbot')
msg = b'this is cool. --bez'
signed_msg = smessage.ssign(b.privkey.data, msg)
print(signed_msg)
verified_msg = smessage.sverify(b.pubkey.data, signed_msg)
print(verified_msg)
def test_send():
z = Komrade('zuckbot')
if __name__=='__main__':
test_msg()