mirror of
https://github.com/ComradCollective/Comrad
synced 2024-11-01 21:40:32 +00:00
255 lines
9.8 KiB
Python
255 lines
9.8 KiB
Python
class Keymaker(Logger):
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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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# 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: return given_key
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found_key = self.crypt_keys.get(uri,prefix=f'/{keyname}/')
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if found_key: return found_key
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def getkey(self, keyname, keychain={}, uri=None):
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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: return key
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## 2) I can assemble the key
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key_encr = self.findkey(keyname+'_encr', keychain,uri)
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key_decr_key = self.findkey(keyname+'_decr_key', keychain, uri)
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key_decr_cell = self.findkey(keyname+'_decr_cell', keychain, uri)
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key_decr_pass = self.findkey(keyname+'_decr_pass', keychain, uri)
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key = self.assemble_key(key_encr, key_decr_key, key_decr_cell, key_decr_pass)
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return key
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def assemble_key(self, key_encr, key_decr_key, key_decr_cell, key_decr_pass):
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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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# need some way to regenerate the decryptor
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if not key_decr_cell:
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if key_decr_key:
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key_decr_cell = SCellSeal(key=key_decr_key)
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elif key_decr_pass:
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key_decr_cell = SCellSeal(passphrase=passphrase)
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# need the decryptor half
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if not key_decr_cell:
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self.log('!! decryptor half not given')
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return
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# decrypt!
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try:
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key = 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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# def assemble_key(self, key_encr, key_decr, passphrases={}, keychain_encr={}, keychain_decr={}, keyname=''):
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# key_decr_decr_key,key_decr_decr_cell = self.getkey_decr_decr_keycell(passphrases=passphrases,keyname=keyname)
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# self.log(f'about to decrypt {key_decr_encr} ({keyname}) with cell {key_decr_decr_cell}')
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# try:
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# key_decr = key_decr_decr_cell.decrypt(key_decr_encr)
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# except ThemisError as e:
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# self.log('!!',e)
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# return
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# self.log(f'{keyname}bkey_decr <--',pubkey_decr)
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# return pubkey_decr
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def buildkey(self, uri, passphrases={}, keychain_encr={}, keychain_decr={}, keyname='pubkey'):
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# if the decryption keys have been provided to me
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key_decr = None
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key_encr = None
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if keychain_decr:
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# get the relevant decryption key
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key_decr = keychain_decr.get(f'{keyname}_decr'):
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# see if I have the right encrypted key
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key_encr = self.getkey_encr(uri, keyname=keyname+'_encr', **kwargs)
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# conversely, if the encryption keys have been provided to me
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elif keychain_encr:
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# get the relevant encryption key
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key_encr = keychain_encr.get(f'{keyname}_encr'):
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# see if I have the right decryption key stored
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key_decr = self.getkey_decr(uri, keyname=keyname, )
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# then, once I have both: put them together
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if not key_decr and not key_encr: return
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try:
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key = SCellSeal(key=key_decr).decrypt(key_encr)
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except ThemisError as e:
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self.log('key recovery failed',e)
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return key
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def pubkey(self, **kwargs):
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return self.getkey(uri=self.name,keyname='pub',**kwargs)
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def privkey(self, **kwargs):
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return self.getkey(uri=self.pubkey(**kwargs),keyname='priv',**kwargs)
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def adminkey(self, **kwargs):
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return self.getkey(uri=self.privkey(**kwargs),keyname='admin',**kwargs)
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## (1-X) ENCRYPTED KEYS
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def getkey_encr(self, uri, passphrases={}, keychain_decr={}, keyname='pub_encr'):
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# can I find the key?
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found_key = self.crypt_keys.get(uri,prefix=f'/{keyname}/')
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if found_key: return found_key
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# otherwise, get it by encrypting its components?
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key_made = self.buildkey_encr(passphrases=passphrases)
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if key_made: return key_made
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# flag error
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self.log(f'!! could not get {keyname}key_encr')
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def pubkey_encr(self, **kwargs):
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return self.getkey_encr(uri=self.name,keyname='pub',**kwargs)
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def privkey_encr(self, **kwargs):
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return self.getkey(uri=self.pubkey_encr(**kargs),keyname='priv',**kwargs)
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def adminkey_encr(self, **kwargs):
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return self.getkey(uri=self.privkey_encr(**kargs),keyname='admin',**kwargs)
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def buildkey_encr(self, passphrases={}, keyname='pub'):
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# get decrypted key
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key_encr_decr = self.getkey_encr_decr(keyname=keyname)
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# get encrypted key
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key_encr_encr_key,key_encr_encr_cell = self.getkey_encr_encr_keycell(passphrases=passphrases,keyname=keyname)
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self.log(f'about to encrypt {key_encr_decr} ({keyname}) with cell {key_encr_encr_cell}')
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try:
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key_encr = key_encr_encr_cell.encrypt(key_encr_decr)
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except ThemisError as e:
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self.log('!!',e)
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return
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self.log(f'{keyname}bkey_encr <--',pubkey_encr)
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return pubkey_encr
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### (1-Y) DECRYPTION KEYS
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def getkey_decr(self, uri, passphrases={}, keychain_encr={}, keyname=''):
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# can I find the key?
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found_key = self.crypt_keys.get(uri,prefix=f'/{keyname}_decr/')
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if found_key: return found_key
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# otherwise, get it by decrypting its components?
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key_made = self.buildkey_decr(passphrases=passphrases)
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if key_made: return key_made
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# flag error
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self.log(f'!! could not get {keyname}key_decr')
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def pubkey_decr(self, **kwargs):
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return self.getkey_decr(uri=self.name,keyname='pub',**kwargs)
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def privkey_decr(self, **kwargs):
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return self.getkey(uri=self.pubkey_decr(**kargs),keyname='priv',**kwargs)
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def adminkey_decr(self, **kwargs):
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return self.getkey(uri=self.privkey_decr(**kargs),keyname='admin',**kwargs)
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def buildkey_decr(self, passphrases={}, keyname='pub'):
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# get encrypted key
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key_decr_encr = self.getkey_decr_encr(keyname=keyname)
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# get decrypted key
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key_decr_decr_key,key_decr_decr_cell = self.getkey_decr_decr_keycell(passphrases=passphrases,keyname=keyname)
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self.log(f'about to decrypt {key_decr_encr} ({keyname}) with cell {key_decr_decr_cell}')
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try:
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key_decr = key_decr_decr_cell.decrypt(key_decr_encr)
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except ThemisError as e:
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self.log('!!',e)
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return
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self.log(f'{keyname}bkey_decr <--',pubkey_decr)
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return pubkey_decr
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## MAGIC KEY ATTRIBUTES
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# loading keys back
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### DECR DECR KEYCELL
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### DECR ENCR KEYS
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## Third level: splitting (encrypted/decryption key) the encrypted keys and decryption keys above
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def getkey_decr_encr(self,crypt_key = None,keyname='pub'):
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if not crypt_key: crypt_key = self.name
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key_decr_encr = self.crypt_keys.get(self.name,prefix=f'/{keyname}_decr_encr/')
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self.log(f'{keyname}key_decr_encr <--',key_decr_encr)
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return key_decr_encr
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def pubkey_decr_encr(self,passphrases={}):
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return self.getkey_decr_encr(crypt_key=self.name, keyname='pub')
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def privkey_decr_encr(self,passphrases={}):
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pubkey_decr = self.pubkey_decr(passphrase=passphrase)
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return self.getkey_decr_encr(crypt_key=pubkey_decr, keyname='priv')
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def adminkey_decr_encr(self,passphrases={}):
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privkey_decr=self.privkey_decr(passphrase=passphrase)
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return self.getkey_decr_encr(crypt_key=privkey_decr, keyname='admin')
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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 getkey_decr_keycell(self, passphrases={}, keyname='pub_decr_decr_key'):
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# get or make
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decr_key = None
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decr_cell = None
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passphrase=passphrases.get(keyname+'_pass')
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if passphrase:
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decr_key=None
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decr_cell = SCellSeal(passphrase=passphrase)
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return (decr_key,decr_cell)
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# do I have a decryption key stored?
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decr_key = self.crypt_keys.get(self.name,prefix=f'/{keyname}/')
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if decr_key:
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decr_cell = SCellSeal(key=decr_key)
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return (decr_key,decr_cell)
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# otherwise, make a new decryption key and cell
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if not decr_cell:
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return self.genkey_pass_keycell()
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return (decr_key,decr_cell)
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def pubkey_decr_decr_keycell(self,passphrases={}):
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return self.getkey_decr_decr_keycell(passphrase=passphrase, keyname='pub')
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def privkey_decr_decr_keycell(self,passphrases={}):
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return self.getkey_decr_decr_keycell(passphrase=passphrase, keyname='priv')
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def adminkey_decr_decr_keycell(self,passphrases={}):
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return self.getkey_decr_decr_keycell(passphrase=passphrase, keyname='admin')
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### DECR KEYS
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