mirror of
https://github.com/ComradCollective/Comrad
synced 2024-11-05 21:20:51 +00:00
567 lines
20 KiB
Python
567 lines
20 KiB
Python
import os,sys; sys.path.append(os.path.abspath(os.path.join(os.path.abspath(os.path.join(os.path.dirname(__file__),'..')),'..')))
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from komrade import *
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from komrade.backend.crypt import *
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from abc import ABC, abstractmethod
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class KomradeKey(ABC):
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@abstractmethod
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def encrypt(self,msg,**kwargs): pass
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@abstractmethod
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def decrypt(self,msg,**kwargs): pass
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@abstractmethod
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def data(self): pass
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@property
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def data_b64(self):return b64encode(self.data)
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@property
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def discreet(self): return make_key_discreet(self.data)
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class KomradeSymmetricKey(KomradeKey):
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@property
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def cell(self):
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if not hasattr(self,'_cell'):
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if hasattr(self,'passphrase') and self.passphrase:
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self._cell = SCellSeal(passphrase=self.passphrase)
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elif hasattr(self,'key') and self.key:
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self._cell = SCellSeal(key=self.key)
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return self._cell
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def encrypt(self,msg,**kwargs):
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if issubclass(type(msg), KomradeKey): msg=msg.data
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return self.cell.encrypt(msg,**kwargs)
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def decrypt(self,msg,**kwargs):
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return self.cell.decrypt(msg,**kwargs)
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class KomradeSymmetricKeyWithPassphrase(KomradeSymmetricKey):
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def __init__(self,passphrase=DEBUG_DEFAULT_PASSPHRASE, why=WHY_MSG):
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self.passphrase=passphrase
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if not self.passphrase:
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self.passphrase=getpass.getpass(why)
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#return self.passphrase
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@property
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def data(self): return KEY_TYPE_SYMMETRIC_WITH_PASSPHRASE.encode('utf-8')
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def __repr__(self): return f'[Symmetric Key] ({self.discreet})'
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class KomradeSymmetricKeyWithoutPassphrase(KomradeSymmetricKey):
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def __init__(self,key=None):
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self.key = GenerateSymmetricKey() if not key else key
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@property
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def data(self): return self.key
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def __repr__(self): return f'[Symmetric Key] ({self.discreet})'
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class KomradeAsymmetricKey(KomradeKey):
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def __init__(self,pubkey,privkey):
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self.pubkey=pubkey
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self.privkey=privkey
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def encrypt(self,msg,pubkey=None,privkey=None):
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if issubclass(type(msg), KomradeKey): msg=msg.data
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pubkey=pubkey if pubkey else self.pubkey
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privkey=privkey if privkey else self.privkey
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return SMessage(privkey,pubkey).wrap(msg)
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def decrypt(self,msg,pubkey=None,privkey=None):
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pubkey=pubkey if pubkey else self.pubkey
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privkey=privkey if privkey else self.privkey
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return SMessage(privkey,pubkey).unwrap(msg)
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@property
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def data(self): return self.key
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class KomradeAsymmetricPublicKey(KomradeAsymmetricKey):
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@property
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def key(self): return self.pubkey
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@property
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def data(self): return self.pubkey
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def __repr__(self): return f'''[Asymmetric Public Key] ({self.discreet})'''
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class KomradeAsymmetricPrivateKey(KomradeAsymmetricKey):
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@property
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def data(self): return self.privkey
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@property
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def key(self): return self.privkey
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def __repr__(self): return f'''[Asymmetric Private Key] ({self.discreet})'''
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def make_key_discreet(data,len_start=10,len_end=0,ellipsis='...',show_len=True):
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if not data: return '?'
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if not isBase64(data): data=b64encode(data)
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data=data.decode()
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dstr = data[:len_start] + ellipsis + data[-len_end:]
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return f'{dstr} (+{len(data)-len_start-len_end})'
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class KomradeEncryptedKey(object):
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def __init__(self,data): self.data=data
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@property
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def data_b64(self): return b64encode(self.data).decode()
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def __repr__(self): return f'[Encrypted Key] ({self.discreet})'
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@property
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def discreet(self): return make_key_discreet(self.data)
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class KomradeEncryptedAsymmetricPrivateKey(KomradeEncryptedKey):
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def __repr__(self): return f'[Encrypted Asymmetric Private Key] ({self.discreet})'
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class KomradeEncryptedAsymmetricPublicKey(KomradeEncryptedKey):
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def __repr__(self): return f'[Encrypted Asymmetric Public Key] ({self.discreet})'
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class KomradeEncryptedSymmetricKey(KomradeEncryptedKey):
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def __repr__(self): return f'[Encrypted Symmetric Key] ({self.discreet})'
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def get_encrypted_key_obj(data,name_of_encrypted_key):
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if name_of_encrypted_key.startswith('privkey'):
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return KomradeEncryptedAsymmetricPrivateKey(data)
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elif name_of_encrypted_key.startswith('pubkey'):
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return KomradeEncryptedAsymmetricPublicKey(data)
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else:
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return KomradeEncryptedSymmetricKey(data)
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class Keymaker(Logger):
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def __init__(self,
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name=None,
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passphrase=DEBUG_DEFAULT_PASSPHRASE,
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uri_id=None,
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keychain={},
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path_crypt_keys=PATH_CRYPT_CA_KEYS,
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path_crypt_data=PATH_CRYPT_CA_DATA):
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# set defaults
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self.name=name
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self._uri_id=uri_id
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self._pubkey=None
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self._keychain=keychain
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self.passphrase=passphrase
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self.path_crypt_keys=path_crypt_keys
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self.path_crypt_data=path_crypt_data
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def find_pubkey(self):
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global TELEPHONE_KEYCHAIN,OPERATOR_KEYCHAIN
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#self.log('keychain?',self.keychain())
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if 'pubkey' in self._keychain and self._keychain['pubkey']:
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return self._keychain['pubkey']
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res = self.crypt_keys.get(self.name, prefix='/pubkey/')
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if res: return res
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res = self.load_qr(self.name)
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if res: return res
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self.log('I don\'t know my public key! Do I need to register?',do_pause=False)
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# raise KomradeException(f'I don\'t know my public key!\n{self}\n{self._keychain}')
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return None
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@property
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def keys(self):
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return sorted(list(self.keychain().keys()))
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@property
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def top_keys(self):
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return [k for k in self.keys if k.count('_')==0]
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def keychain(self,look_for=KEYMAKER_DEFAULT_ALL_KEY_NAMES):
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# load existing keychain
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keys = self._keychain #self._keychain = keys = {**self._keychain}
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# make sure we have the pubkey
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if not 'pubkey' in self._keychain: self._keychain['pubkey']=self.find_pubkey()
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pubkey=self._keychain['pubkey']
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# get uri
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uri = b64encode(pubkey)
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# get from cache
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for keyname in look_for:
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if keyname in keys and keys[keyname]: continue
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key = self.crypt_keys.get(uri,prefix=f'/{keyname}/')
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if key: keys[keyname]=key
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# try to assemble
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keys = self.assemble(self.assemble(keys))
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#store to existing set
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self._keychain = keys
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#return
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return keys
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@property
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def pubkey(self): return self.keychain().get('pubkey')
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@property
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def pubkey_b64(self): return b64encode(self.pubkey) #self.keychain().get('pubkey')
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@property
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def privkey(self): return self.keychain().get('privkey')
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@property
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def adminkey(self): return self.keychain().get('adminkey')
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@property
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def pubkey_encr(self): return self.keychain().get('pubkey_encr')
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@property
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def privkey_encr(self): return self.keychain().get('privkey_encr')
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@property
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def adminkey_encr(self): return self.keychain().get('adminkey_encr')
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@property
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def pubkey_decr(self): return self.keychain().get('pubkey_decr')
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@property
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def privkey_decr(self): return self.keychain().get('privkey_decr')
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@property
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def adminkey_decr(self): return self.keychain().get('adminkey_decr')
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def load_qr(self,name):
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# try to load?
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contact_fnfn = os.path.join(PATH_QRCODES,name+'.png')
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if not os.path.exists(contact_fnfn): return ''
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# with open(contact_fnfn,'rb') as f: dat=f.read()
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from pyzbar.pyzbar import decode
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from PIL import Image
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res= decode(Image.open(contact_fnfn))[0].data
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# self.log('QR??',res,b64decode(res))
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return b64decode(res)
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@property
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def uri_id(self):
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if not self._uri_id:
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pubkey = self.find_pubkey()
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self._uri_id = b64encode(pubkey)
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return self._uri_id
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### BASE STORAGE
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@property
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def crypt_keys(self):
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if not hasattr(self,'_crypt_keys'):
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self._crypt_keys = Crypt(fn=self.path_crypt_keys)
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return self._crypt_keys
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@property
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def crypt_keys_mem(self):
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if not hasattr(self,'_crypt_keys_mem'):
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self._crypt_keys_mem = CryptMemory()
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return self._crypt_keys_mem
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@property
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def crypt_data(self):
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if not hasattr(self,'_crypt_data'):
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self._crypt_data = Crypt(fn=self.path_crypt_data)
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return self._crypt_data
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def can_log_in(self):
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if not self.pubkey: return False
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if not (self.privkey or self.privkey_encr): return False
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return True
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### CREATING KEYS
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def get_new_keys(self):
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raise KomradeException('Every keymaker must make their own get_new_keys() !')
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def gen_keys_from_types(self,key_types=KEYMAKER_DEFAULT_KEY_TYPES,passphrase=DEBUG_DEFAULT_PASSPHRASE):
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"""
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Get new asymmetric/symmetric keys, given a dictionary of constants describing their type
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"""
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asymmetric_pubkey=None
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asymmetric_privkey=None
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keychain = {}
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for key_name,key_type_desc in key_types.items():
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if key_type_desc in {KEY_TYPE_ASYMMETRIC_PUBKEY,KEY_TYPE_ASYMMETRIC_PRIVKEY}:
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if not asymmetric_privkey or not asymmetric_pubkey:
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keypair = GenerateKeyPair(KEY_PAIR_TYPE.EC)
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asymmetric_privkey = keypair.export_private_key()
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asymmetric_pubkey = keypair.export_public_key()
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if key_type_desc==KEY_TYPE_ASYMMETRIC_PRIVKEY:
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keychain[key_name] = KomradeAsymmetricPrivateKey(asymmetric_pubkey,asymmetric_privkey)
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elif key_type_desc==KEY_TYPE_ASYMMETRIC_PUBKEY:
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keychain[key_name] = KomradeAsymmetricPublicKey(asymmetric_pubkey,asymmetric_privkey)
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elif key_type_desc==KEY_TYPE_SYMMETRIC_WITHOUT_PASSPHRASE:
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keychain[key_name]=KomradeSymmetricKeyWithoutPassphrase()
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elif key_type_desc==KEY_TYPE_SYMMETRIC_WITH_PASSPHRASE:
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if not passphrase and not self.passphrase: self.passphrase=getpass.getpass(WHY_MSG)
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passphrase=passphrase if passphrase else self.passphrase
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keychain[key_name]=KomradeSymmetricKeyWithPassphrase(passphrase=passphrase)
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return keychain
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def gen_encr_keys(self,keychain,keys_to_gen,passphrase=DEBUG_DEFAULT_PASSPHRASE):
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"""
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Encrypt other keys with still other keys!
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"""
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# generate encrypted keys too
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for key_name in keys_to_gen:
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if key_name.endswith('_encr') and key_name not in keychain:
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# encrypt it with the associated decr
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# self.log(f'let\'s encrypt {key_name}!')
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name_of_what_to_encrypt = key_name[:-len('_encr')]
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the_key_to_encrypt_it_with = name_of_what_to_encrypt + '_decr'
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if the_key_to_encrypt_it_with in keychain and name_of_what_to_encrypt in keychain:
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_key_decr = keychain[the_key_to_encrypt_it_with]
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_key = keychain[name_of_what_to_encrypt]
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# self.log(f'about to encrypt key {name_of_what_to_encrypt}, using {the_key_to_encrypt_it_with}, which is a type {KEYMAKER_DEFAULT_KEY_TYPES[the_key_to_encrypt_it_with]} and has value {keychain[the_key_to_encrypt_it_with]}')
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_key_encr = _key_decr.encrypt(_key)
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_key_encr_obj = get_encrypted_key_obj(_key_encr, name_of_what_to_encrypt)
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# self.log(f'{_key}\n-- encrypting ----->\n{_key_encr}')
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keychain[key_name]=_key_encr_obj
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return keychain
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def forge_new_keys(self,
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name=None,
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passphrase=DEBUG_DEFAULT_PASSPHRASE,
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keys_to_save = KEYMAKER_DEFAULT_KEYS_TO_SAVE_ON_SERVER,
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keys_to_return = KEYMAKER_DEFAULT_KEYS_TO_SAVE_ON_CLIENT,
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keys_to_gen = KEYMAKER_DEFAULT_KEYS_TO_GEN,
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key_types = KEYMAKER_DEFAULT_KEY_TYPES):
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# setup
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keys_to_gen = set(keys_to_gen) | set(keys_to_save) | set(keys_to_return)
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keys_to_gen = sorted(list(keys_to_gen),key=lambda x: x.count('_'))
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key_types = dict([(k,key_types[k]) for k in keys_to_gen])
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if not name: name=self.name
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# show user what's happening
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self.log(f'''
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Keymaker ({self}) is forging new keys for {name}
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I will save these keys in this crypt:
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{keys_to_save}
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I will also save this user's pubkey (as b64 URI) to:
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{self.get_path_qrcode(name=name)}
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I will return these keys to you:
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{keys_to_return}
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which means I will end up generating these keys:
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{keys_to_gen}
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I will also be using these key types to do so:
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{dict_format(key_types,tab=4)}
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''')
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# gen decryptor keys!
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keychain = self.gen_keys_from_types(key_types,passphrase=passphrase)
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# gen encrypted keys!
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keychain = self.gen_encr_keys(keychain,keys_to_gen,passphrase=passphrase)
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self.log('I built this keychain!',dict_format(keychain,tab=2))
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# save keys!
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# get URI id to save under (except for pubkeys, accessible by name)
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uri_id,keys_saved_d,keychain = self.save_keychain(name,keychain,keys_to_save)
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self.log('I saved this keychain:',dict_format(keys_saved_d,tab=2),'using the generated-from-pubkey URI ID',uri_id)
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# return keys!
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keys_returned = self.return_keychain(keychain,keys_to_return)
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self.log('I am returning this keychain:',dict_format(keys_returned,tab=2))
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return (uri_id,keys_returned)
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def return_keychain(self,keychain,keys_to_return=None):
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keychain_toreturn = {}
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if not keys_to_return: keys_to_return = list(keychain.keys())
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for key in keys_to_return:
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if key in keychain:
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keychain_toreturn[key]=keychain[key]
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return keychain_toreturn
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def get_path_qrcode(self,name=None,dir=None,ext='.png'):
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if not name: name=self.name
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if not dir: dir = PATH_QRCODES
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fnfn = os.path.join(dir,name+ext)
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return fnfn
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@property
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def qr(self): return self.qr_str(data=self.uri_id)
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def qr_str(self,data=None):
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import qrcode
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qr=qrcode.QRCode()
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qr.add_data(self.uri_id if not data else data)
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ascii = capture_stdout(qr.print_ascii)
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return ascii
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def save_uri_as_qrcode(self,uri_id=None,name=None):
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if not uri_id: uri_id = self.uri_id
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if not uri_id and not self.uri_id: raise KomradeException('Need URI id to save!')
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if not name: name=self.name
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# gen
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import pyqrcode
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qr = pyqrcode.create(uri_id)
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ofnfn = self.get_path_qrcode(name=name)
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qr.png(ofnfn,scale=5)
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self._uri_id = uri_id
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self.log(f'''Saved URI(=pubkey_b64) as a QR code: {ofnfn} {self.qr}''')
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def save_keychain(self,name,keychain,keys_to_save=None,uri_id=None):
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if not keys_to_save: keys_to_save = list(keychain.keys())
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if not uri_id: uri_id = b64encode(keychain['pubkey'].data).decode() #uri_id = get_random_id() + get_random_id()
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# self.log(f'SAVING KEYCHAIN FOR {name} under URI {uri_id}')
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self._uri_id = uri_id
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# filter for transfer
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for k,v in keychain.items():
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if issubclass(type(v),KomradeKey):
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v=v.data
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keychain[k]=v
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# save keychain
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keys_saved_d={}
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for keyname in keys_to_save:
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if not '_' in keyname and keyname!='pubkey':
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raise KomradeException('there is no private property in a socialist network! all keys must be split between komrades')
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if keyname in keychain:
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# uri = uri_id
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uri = uri_id if keyname!='pubkey' else name
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val = keychain[keyname]
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if issubclass(type(keychain[keyname]), KomradeKey) or issubclass(type(keychain[keyname]), KomradeEncryptedKey):
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val = val.data
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self.crypt_keys.set(uri,val,prefix=f'/{keyname}/')
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keys_saved_d[keyname] = keychain[keyname]
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# save pubkey as QR
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if not 'pubkey' in keys_saved_d:
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# self.log('did not save pubkey in crypt, storing as QR...')
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self.save_uri_as_qrcode(name=name, uri_id=uri_id)
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# set to my keychain right away
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self._keychain = keychain
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return (uri_id,keys_saved_d,keychain)
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def assemble(self,_keychain):
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# last minute assemblies?
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encr_keys = [k for k in _keychain if k.endswith('_encr')]
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for ekey in encr_keys:
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eval=_keychain[ekey]
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if not eval: continue
|
|
|
|
unencrkey = ekey[:-len('_encr')]
|
|
if unencrkey in _keychain: continue
|
|
|
|
decrkey = unencrkey+'_decr'
|
|
if decrkey not in _keychain: continue
|
|
|
|
dval=_keychain[decrkey]
|
|
if not dval: continue
|
|
|
|
# self.log(ekey,decrkey,'??')
|
|
# self.log(eval,dval,'????')
|
|
|
|
new_val = self.assemble_key(eval,dval)
|
|
# self.log('!!#!',new_val)
|
|
if new_val:
|
|
_keychain[unencrkey] = new_val
|
|
return _keychain
|
|
|
|
def assemble_key(self, key_encr, key_decr, key_encr_name=None, key_decr_name=None):
|
|
# self.log(f'assembling key: {key_decr} decrypting {key_encr}')
|
|
|
|
# need the encrypted half
|
|
if not key_encr:
|
|
# self.log('!! encrypted half not given')
|
|
return
|
|
if not key_decr:
|
|
if self.passphrase:
|
|
key_decr = self.passphrase
|
|
else:
|
|
# self.log('!! decryptor half not given')
|
|
return
|
|
|
|
# need some way to regenerate the decryptor
|
|
decr_cell = self.get_cell(key_decr)
|
|
|
|
# need the decryptor half
|
|
if not decr_cell:
|
|
# self.log('!! decryptor cell not regenerable')
|
|
return
|
|
|
|
# decrypt!
|
|
try:
|
|
# self.log(f'>> decrypting {key_encr_name} with {key_decr_name}\n({key_encr} with cell {decr_cell}')
|
|
key = decr_cell.decrypt(key_encr)
|
|
# self.log('assembled_key built:',key)
|
|
return key
|
|
except ThemisError as e:
|
|
# self.log('!! decryption failed:',e)
|
|
return
|
|
|
|
def get_cell(self, str_or_key_or_cell):
|
|
# self.log('getting decr cell for',str_or_key_or_cell)
|
|
|
|
if type(str_or_key_or_cell)==SCellSeal:
|
|
return str_or_key_or_cell
|
|
elif type(str_or_key_or_cell)==str:
|
|
return SCellSeal(passphrase=str_or_key_or_cell)
|
|
elif type(str_or_key_or_cell)==bytes:
|
|
return SCellSeal(key=str_or_key_or_cell)
|
|
|
|
|
|
# def keychain(self,
|
|
# passphrase=DEBUG_DEFAULT_PASSPHRASE,
|
|
# extra_keys={},
|
|
# keys_to_gen=KEYMAKER_DEFAULT_KEYS_TO_GEN,
|
|
# uri_id=None,
|
|
# **kwargs):
|
|
|
|
# # assemble as many keys as we can!
|
|
# self.log(f'''keychain(
|
|
# passphrase={passphrase},
|
|
# extra_keys={extra_keys},
|
|
# keys_to_gen={keys_to_gen},
|
|
# uri_id={uri_id},
|
|
# **kwargs = {kwargs}
|
|
# )''')
|
|
|
|
# if not uri_id: uri_id = self.uri_id
|
|
# if not uri_id and not self.uri_id:
|
|
# raise KomradeException('Need URI id to complete finding of keys!')
|
|
# self.log('getting keychain for uri ID:',uri_id)
|
|
|
|
# # if not force and hasattr(self,'_keychain') and self._keychain: return self._keychain
|
|
# if passphrase: self.passphrase=passphrase
|
|
|
|
# # start off keychain
|
|
# _keychain = {**extra_keys, **self._keychain}
|
|
# self.log('_keychain at start of keychain() =',_keychain)
|
|
|
|
# # find
|
|
# for keyname in keys_to_gen:
|
|
# if keyname in _keychain and _keychain[keyname]: continue
|
|
# # self.log('??',keyname,keyname in self._keychain,'...')
|
|
# newkey = self.crypt_keys.get(uri_id,prefix=f'/{keyname}/')
|
|
# if newkey: _keychain[keyname] = newkey
|
|
|
|
# # return
|
|
# _keychain = self.assemble(_keychain)
|
|
# self._keychain = _keychain
|
|
# return _keychain
|
|
|
|
|
|
|
|
|
|
|
|
return _keychain
|
|
|
|
|
|
|
|
if __name__ == '__main__':
|
|
keymaker = Keymaker('marx69')
|
|
keychain = keymaker.forge_new_keys()
|
|
|
|
print(keychain) |