diff options
| -rw-r--r-- | __init__.py | 76 |
1 files changed, 72 insertions, 4 deletions
diff --git a/__init__.py b/__init__.py index abec6488..2caee108 100644 --- a/__init__.py +++ b/__init__.py @@ -23,21 +23,32 @@ class Soledad(object): if not gpghome: gpghome = self.GNUPG_HOME self._gpg = GPGWrapper(gpghome=gpghome) - # load OpenPGP keypair + # load/generate OpenPGP keypair if not self._has_openpgp_keypair(): self._gen_openpgp_keypair() self._load_openpgp_keypair() - # load secret + # load/generate secret if not self._has_secret(): self._gen_secret() self._load_secret() + + #------------------------------------------------------------------------- + # Management of secret for symmetric encryption + #------------------------------------------------------------------------- + def _has_secret(self): + """ + Verify if secret already exists in a local encrypted file. + """ if os.path.isfile(self.SECRET_PATH): return True return False def _load_secret(self): + """ + Load secret from local encrypted file. + """ try: with open(self.SECRET_PATH) as f: self._secret = str(self._gpg.decrypt(f.read())) @@ -45,14 +56,24 @@ class Soledad(object): raise IOError('Failed to open secret file %s.' % self.SECRET_PATH) def _gen_secret(self): + """ + Generate secret for symmetric encryption and store it in a local encrypted file. + """ self._secret = ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(self.SECRET_LENGTH)) ciphertext = self._gpg.encrypt(self._secret, self._fingerprint, self._fingerprint) f = open(self.SECRET_PATH, 'w') f.write(str(ciphertext)) f.close() + #------------------------------------------------------------------------- + # Management of OpenPGP keypair + #------------------------------------------------------------------------- def _has_openpgp_keypair(self): + """ + Verify if a keypair exists for this user. + """ + # TODO: verify if private key exists. try: self._gpg.find_key(self._user_email) return True @@ -60,6 +81,9 @@ class Soledad(object): return False def _gen_openpgp_keypair(self): + """ + Generate a keypair for this user. + """ params = self._gpg.gen_key_input( key_type='RSA', key_length=4096, @@ -69,22 +93,66 @@ class Soledad(object): self._gpg.gen_key(params) def _load_openpgp_keypair(self): + """ + Load the fingerprint for this user's keypair. + """ self._fingerprint = self._gpg.find_key(self._user_email)['fingerprint'] + def publish_pubkey(self, keyserver): + """ + Publish OpenPGP public key to a keyserver. + """ + pass + + #------------------------------------------------------------------------- + # Data encryption and decription + #------------------------------------------------------------------------- + def encrypt(self, data, sign=None, passphrase=None, symmetric=False): + """ + Encrypt data. + """ return str(self._gpg.encrypt(data, self._fingerprint, sign=sign, passphrase=passphrase, symmetric=symmetric)) def encrypt_symmetric(self, doc_id, data, sign=None): + """ + Symmetrically encrypt data using this user's secret. + """ h = hmac.new(self._secret, doc_id).hexdigest() return self.encrypt(data, sign=sign, passphrase=h, symmetric=True) def decrypt(self, data, passphrase=None, symmetric=False): + """ + Decrypt data. + """ return str(self._gpg.decrypt(data, passphrase=passphrase)) def decrypt_symmetric(self, doc_id, data): + """ + Symmetrically decrypt data using this user's secret. + """ h = hmac.new(self._secret, doc_id).hexdigest() return self.decrypt(data, passphrase=h) - #def publish_pubkey(self): - # return self._gpg.export_keys( + #------------------------------------------------------------------------- + # Document storage, retrieval and sync + #------------------------------------------------------------------------- + + def put(self, doc_id, data): + """ + Store a document. + """ + pass + + def get(self, doc_id): + """ + Retrieve a document. + """ + pass + + def sync(self): + """ + Synchronize with LEAP server. + """ + pass |