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373 lines
15 KiB
Python
373 lines
15 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.operators.crypt import *
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class Keymaker(Logger):
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def __init__(self,name=None,passphrase=None):
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self.name=name
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self.passphrase=passphrase
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for k in KEYNAMES:
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func = lambda: self.keychain().get(k)
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setattr(self,'_'+k,func)
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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=PATH_CRYPT_KEYS)
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return self._crypt_keys
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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=PATH_CRYPT_DATA)
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return self._crypt_data
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### STARTING WITH MOST ABSTRACT
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def findkey(self, keyname, keychain={}, uri=None):
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self.log(f'looking for key {keyname}, in keychain {keychain.keys()} or under crypt uri {uri}')
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# look in keychain, then in crypt, for this key
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given_key = keychain.get(keyname)
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if given_key:
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self.log(f'{keyname} found in keychain: {given_key}')
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return given_key
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found_key = self.crypt_keys.get(uri,prefix=f'/{keyname}/')
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if found_key:
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self.log(f'{keyname} found in crypt: {given_key}')
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return found_key
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self.log(f'{keyname} not found!!')
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def getkey(self, keyname, keychain={}, uri=None):
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self.log(f'keyname={keyname}, keychain={keychain.keys()}, uri={uri}')
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# 1) I already have this key stored in either the keychain or the crypt; return straight away
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key = self.findkey(keyname, keychain, uri)
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if key:
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self.log(f'>> I have {key} already, returning')
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return key
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## 2) I can assemble the key
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self.log(f'assembling key: {keyname}_encr + {keyname}_decr')
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key_encr = self.findkey(keyname+'_encr', keychain,uri)
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key_decr = self.findkey(keyname+'_decr', keychain, uri)
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key = self.assemble_key(key_encr, key_decr)
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return key
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def get_cell(self, str_or_key_or_cell):
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self.log('getting decr cell for',str_or_key_or_cell)
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if type(str_or_key_or_cell)==SCellSeal:
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return str_or_key_or_cell
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elif type(str_or_key_or_cell)==str:
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return SCellSeal(passphrase=str_or_key_or_cell)
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elif type(str_or_key_or_cell)==bytes:
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return SCellSeal(key=str_or_key_or_cell)
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def assemble_key(self, key_encr, key_decr):
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self.log(f'assembling key: {key_decr} decrypting {key_encr}')
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# need the encrypted half
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if not key_encr:
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self.log('!! encrypted half not given')
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return
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if not key_decr:
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if self.passphrase:
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key_decr = self.passphrase
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else:
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self.log('!! decryptor half not given')
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return
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# need some way to regenerate the decryptor
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decr_cell = self.get_cell(key_decr)
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# need the decryptor half
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if not decr_cell:
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self.log('!! decryptor cell not regenerable')
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return
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# decrypt!
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try:
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self.log(f'>> decrypting {key_encr} with cell {decr_cell}')
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key = decr_cell.decrypt(key_encr)
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self.log('assembled_key built:',key)
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return key
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except ThemisError as e:
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self.log('!! decryption failed:',e)
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# Concrete keys
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## (1) Final keys
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def pubkey(self, **kwargs):
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return self.getkey(keyname='pubkey',uri=self.name,**kwargs)
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def privkey(self, **kwargs):
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return self.getkey(keyname='privkey',uri=self.pubkey(**kwargs),**kwargs)
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def adminkey(self, **kwargs):
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return self.getkey(keyname='adminkey',uri=self.privkey(**kwargs),**kwargs)
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## (1-X) Encrypted halves
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def pubkey_encr(self, **kwargs):
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return self.getkey(uri=self.name,keyname='pubkey_encr',**kwargs)
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def privkey_encr(self, **kwargs):
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return self.getkey(uri=self.pubkey(**kwargs),keyname='privkey_encr',**kwargs)
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def adminkey_encr(self, **kwargs):
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return self.getkey(uri=self.privkey(**kwargs),keyname='adminkey_encr',**kwargs)
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## (1-Y) Decrpytor halves
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def pubkey_decr(self, **kwargs):
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return self.getkey(uri=self.name,keyname='pubkey_decr',**kwargs)
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def privkey_decr(self, **kwargs):
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return self.getkey(uri=self.pubkey(**kwargs),keyname='privkey_decr',**kwargs)
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def adminkey_decr(self, **kwargs):
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return self.getkey(uri=self.privkey(**kwargs),keyname='adminkey_decr',**kwargs)
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## Second halving!
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## (1-X-X)
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def pubkey_encr_encr(self, **kwargs):
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return self.getkey(uri=self.name,keyname='pubkey_encr_encr',**kwargs)
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def privkey_encr_encr(self, **kwargs):
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return self.getkey(uri=self.pubkey_encr(**kwargs),keyname='privkey_encr_encr',**kwargs)
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def adminkey_encr_encr(self, **kwargs):
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return self.getkey(uri=self.privkey_encr(**kwargs),keyname='adminkey_encr_encr',**kwargs)
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## (1-X-Y)
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def pubkey_encr_decr(self, **kwargs):
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return self.getkey(uri=self.name,keyname='pubkey_encr_decr',**kwargs)
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def privkey_encr_decr(self, **kwargs):
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return self.getkey(uri=self.pubkey_encr(**kwargs),keyname='privkey_encr_decr',**kwargs)
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def adminkey_encr_decr(self, **kwargs):
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return self.getkey(uri=self.privkey_encr(**kwargs),keyname='adminkey_encr_decr',**kwargs)
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## (1-Y-X)
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def pubkey_decr_encr(self, **kwargs):
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return self.getkey(uri=self.name,keyname='pubkey_decr_encr',**kwargs)
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def privkey_decr_encr(self, **kwargs):
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return self.getkey(uri=self.pubkey_decr(**kwargs),keyname='privkey_decr_encr',**kwargs)
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def adminkey_decr_encr(self, **kwargs):
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return self.getkey(uri=self.privkey_decr(**kwargs),keyname='adminkey_decr_encr',**kwargs)
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## (1-Y-Y)
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def pubkey_decr_decr(self, **kwargs):
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return self.getkey(uri=self.name,keyname='pubkey_decr_decr',**kwargs)
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def privkey_decr_decr(self, **kwargs):
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return self.getkey(uri=self.pubkey_decr(**kwargs),keyname='privkey_decr_decr',**kwargs)
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def adminkey_decr_decr(self, **kwargs):
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return self.getkey(uri=self.privkey_decr(**kwargs),keyname='adminkey_decr_decr',**kwargs)
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# convenience functions
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# Concrete keys
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@property
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def pubkey__(self): return self.keychain()['pubkey']
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@property
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def privkey_(self, **kwargs): return self.keychain()['privkey']
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@property
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def adminkey_(self, **kwargs): return self.keychain()['adminkey']
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## (1-X) Encrypted halves
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@property
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def pubkey_encr_(self, **kwargs):return self.keychain()['pubkey_encr']
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@property
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def privkey_encr_(self, **kwargs): return self.keychain()['privkey_encr']
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@property
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def adminkey_encr_(self, **kwargs): return self.keychain()['adminkey_encr']
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## (1-Y) Decrpytor halves
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@property
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def pubkey_decr_(self, **kwargs): return self.keychain()['pubkey_decr']
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@property
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def privkey_decr_(self, **kwargs): return self.keychain()['privkey_decr']
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@property
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def adminkey_decr_(self, **kwargs): return self.keychain()['adminkey_decr']
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## Second halving!
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## (1-X-X)
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@property
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def pubkey_encr_encr_(self, **kwargs): return self.keychain()['pubkey_encr_encr']
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@property
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def privkey_encr_encr_(self, **kwargs): return self.keychain()['privkey_encr_encr']
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@property
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def adminkey_encr_encr_(self, **kwargs): return self.keychain()['adminkey_encr_encr']
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## (1-X-Y)
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@property
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def pubkey_encr_decr_(self, **kwargs): return self.keychain()['pubkey_encr_decr']
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@property
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def privkey_encr_decr_(self, **kwargs): return self.keychain()['privkey_encr_decr']
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@property
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def adminkey_encr_decr_(self, **kwargs): return self.keychain()['adminkey_encr_decr']
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## (1-Y-X)
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@property
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def pubkey_decr_encr_(self, **kwargs): return self.keychain()['pubkey_decr_encr']
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@property
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def privkey_decr_encr_(self, **kwargs): return self.keychain()['privkey_decr_encr']
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@property
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def adminkey_decr_encr_(self, **kwargs): return self.keychain()['adminkey_decr_encr']
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## (1-Y-Y)
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@property
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def pubkey_decr_decr_(self, **kwargs): return self.keychain()['pubkey_decr_decr']
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@property
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def privkey_decr_decr_(self, **kwargs): return self.keychain()['privkey_decr_decr']
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@property
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def adminkey_decr_decr_(self, **kwargs): return self.keychain()['adminkey_decr_decr']
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# Get key de-cryptors
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def genkey_pass_keycell(self,pass_phrase,q_name='Read permissions?'):
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if pass_phrase is None:
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pass_key = GenerateSymmetricKey()
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pass_cell = SCellSeal(key=pass_key)
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else:
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if pass_phrase is True: pass_phrase=getpass.getpass(f'Enter pass phrase [{q_name}]: ')
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pass_key = None
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pass_cell = SCellSeal(passphrase=pass_phrase)
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self.log(f'pass_key [{q_name}] <--',pass_key)
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self.log(f'pass_cell [{q_name}] <--',pass_cell)
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return (pass_key, pass_cell)
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def exists(self):
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return self.crypt_keys.exists(self.name,prefix='/pubkey_encr/') or self.crypt_keys.exists(self.name,prefix='/pubkey_decr/') or self.crypt_keys.exists(self.name,prefix='/pubkey/')
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### CREATING KEYS
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def get_new_keys(self,pubkey_pass = None, privkey_pass = None, adminkey_pass = None):
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# Get decryptor keys back from The Operator (one half of the Keymaker)
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keychain = self.forge_new_keys(self.name)
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self.log('create_keys() res from Operator? <-',keychain)
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# Now lock the decryptor keys away, sealing it with a password of memory!
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self.lock_new_keys(keychain)
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def forge_new_keys(self,name,pubkey_is_public=False,return_all_keys=False):
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self.log('forging new keys...')
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# Create public and private keys
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keypair = GenerateKeyPair(KEY_PAIR_TYPE.EC)
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privkey = keypair.export_private_key()
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pubkey = keypair.export_public_key()
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adminkey = GenerateSymmetricKey()
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# Create decryption/permission keys
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pubkey_decr = GenerateSymmetricKey()
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privkey_decr = GenerateSymmetricKey()
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adminkey_decr = GenerateSymmetricKey() #SCellSeal(passphrase=passphrase)
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# Encrypt original keys
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pubkey_encr = SCellSeal(key=pubkey_decr).encrypt(pubkey)
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privkey_encr = SCellSeal(key=privkey_decr).encrypt(privkey)
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adminkey_encr = SCellSeal(key=adminkey_decr).encrypt(adminkey)
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# store encrypted on my hardware
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self.crypt_keys.set(name,pubkey_encr,prefix='/pubkey_encr/')
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self.crypt_keys.set(pubkey,privkey_encr,prefix='/privkey_encr/')
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self.crypt_keys.set(privkey,adminkey_encr,prefix='/adminkey_encr/')
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# store permissions file?
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secret_admin_val = pubkey_encr + BSEP + b'find,read,admin'
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if pubkey_is_public: secret_admin_val += b'*'+BSEP+b'find'
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secret_admin_val_encr = SCellSeal(key=adminkey).encrypt(secret_admin_val)
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self.crypt_keys.set(adminkey,secret_admin_val_encr,prefix='/permkey_encr/')
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# keep public key?
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if pubkey_is_public: self.crypt_keys.set(name,pubkey_decr,prefix='/pubkey_decr/')
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# send back decryption keys to client
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if not return_all_keys: # default situation
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keychain = {
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'pubkey_decr':pubkey_decr,
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'privkey_decr':privkey_decr,
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'adminkey_decr':adminkey_decr
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}
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else: # only in special case!
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keychain = {
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'pubkey':pubkey,'pubkey_encr':pubkey_encr,'pubkey_decr':pubkey_decr,
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'privkey':privkey,'privkey_encr':privkey_encr,'privkey_decr':privkey_decr,
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'adminkey':adminkey,'adminkey_encr':adminkey_encr,'adminkey_decr':adminkey_decr
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}
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return keychain
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def lock_new_keys(self,keychain,passphrase=None):
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# we're not going to store the decryptor keys directly though
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if not passphrase:
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if self.passphrase:
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passphrase=self.passphrase
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else:
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self.passphrase=passphrase=getpass.getpass('Forge the password of memory: ')
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cell = SCellSeal(passphrase=passphrase)
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# encrypt the decryptor keys
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pubkey_decr_encr = cell.encrypt(keychain['pubkey_decr'])
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privkey_decr_encr = cell.encrypt(keychain['privkey_decr'])
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adminkey_decr_encr = cell.encrypt(keychain['adminkey_decr'])
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# set to crypt and keychain
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self.crypt_keys.set(self.name,pubkey_decr_encr,prefix='/pubkey_decr_encr/')
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#keychain['pubkey_decr_encr']=pubkey_decr_encr
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self.crypt_keys.set(keychain['pubkey_decr'],privkey_decr_encr,prefix='/privkey_decr_encr/')
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#keychain['privkey_decr_encr']=privkey_decr_encr
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self.crypt_keys.set(keychain['privkey_decr'],adminkey_decr_encr,prefix='/adminkey_decr_encr/')
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#keychain['adminkey_decr_encr']=adminkey_decr_encr
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# store decryption keys if not passworded?
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pub_ddk,priv_ddk,admin_ddk=[x+'key_decr_decr_key' for x in ['pub','priv','admin']]
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if pub_ddk in keychain:
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self.crypt_keys.set(self.name, keychain[pub_ddk], prefix=f'/{pub_ddk}/')
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if priv_ddk in keychain:
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self.crypt_keys.set(self.name, keychain[priv_ddk], prefix=f'/{priv_ddk}/')
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if admin_ddk in keychain:
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self.crypt_keys.set(self.name, keychain[admin_ddk], prefix=f'/{admin_ddk}/')
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# # return protected keychain
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# todel = ['pubkey_decr','privkey_decr','adminkey_decr']
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# for x in todel:
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# if x in keychain:
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# del keychain[x]
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# # add encr versions
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# keychain
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# del keychain['pubkey_decr']
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# del keychain['privkey_decr']
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# del keychain['adminkey_decr']
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# return ()
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return passphrase
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# def load_concrete_keychain():
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# keychain = {}
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# for keyname in KEYNAMES:
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# keychain=self.findkey(keyname, keychain, uri)
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def keychain(self,passphrase=None,force=False,**kwargs):
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# assemble as many keys as we can!
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if not force and hasattr(self,'_keychain') and self._keychain: return self._keychain
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if passphrase: self.passphrase=passphrase
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_keychain = defaultdict(None)
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for keyname in reversed(KEYNAMES+KEYNAMES):
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self.log('??',keyname,'...')
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if hasattr(self,keyname):
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method=getattr(self,keyname)
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res=method(keychain=_keychain, **kwargs)
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self.log('res <--',res)
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if res:
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_keychain[keyname]=res
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return _keychain
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