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Add _decrypt_key

pull/79/head
tuxxy 2017-10-12 14:58:03 -06:00
parent 5a30ab0626
commit 9c8bc7eb6e
No known key found for this signature in database
GPG Key ID: 7BB971A0E89144D9
1 changed files with 21 additions and 1 deletions
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22
nkms/crypto/powers.py
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@ -184,6 +184,26 @@ class EncryptingPower(CryptoPowerUp):
enc_key_data = API.symm_encrypt(plain_key_data, data_key)
return (enc_key_data, enc_key_path)
def _decrypt_key(
self,
enc_data_key: bytes,
enc_path_key: bytes,
priv_key: bytes
) -> bytes:
"""
Decrypts the enc_data_key via ECIES decapsulation.
TODO: Name these params better
:param enc_data_key: Encrypted key to decrypt
:param enc_path_key: ECIES encapsulated key
:param priv_key: Private key to use in ECIES decapsulate
:return: decrypted key
"""
dec_symm_key = API.ecies_decapsulate(priv_key, enc_path_key)
return API.symm_decrypt(dec_symm_key, enc_data_key)
def encrypt(
self,
data: bytes,
@ -191,7 +211,7 @@ class EncryptingPower(CryptoPowerUp):
M: int,
N: int,
path: bytes = None
) -> Tuple[Tuple[bytes, bytes], bytes, List[umbral.RekeyFrag]]:
) -> Tuple[Tuple[bytes, bytes, bytes], bytes, List[umbral.RekeyFrag]]:
"""
Encrypts data using ECIES.