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Integrates encryption/decryption within the Cryptographer. Close #63

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Includes unittests. Also reformats test_inspector to avoid using cli functions
This commit is contained in:
Sergi Delgado Segura
2019-12-06 13:22:14 +01:00
parent 3c95c31bc8
commit a8800ac375
11 changed files with 228 additions and 139 deletions
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26
apps/cli/blob.py
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@@ -12,29 +12,3 @@ class Blob:
raise ValueError("Non-Hex character found in txid.")
self.data = data
def encrypt(self, tx_id):
if len(tx_id) != 64:
raise ValueError("txid does not matches the expected size (32-byte / 64 hex chars).")
elif re.search(r"^[0-9A-Fa-f]+$", tx_id) is None:
raise ValueError("Non-Hex character found in txid.")
# Transaction to be encrypted
# FIXME: The blob data should contain more things that just the transaction. Leaving like this for now.
tx = unhexlify(self.data)
# sk is the H(txid) (32-byte) and nonce is set to 0 (12-byte)
sk = sha256(unhexlify(tx_id)).digest()
nonce = bytearray(12)
# Encrypt the data
cipher = ChaCha20Poly1305(sk)
encrypted_blob = cipher.encrypt(nonce=nonce, data=tx, associated_data=None)
encrypted_blob = hexlify(encrypted_blob).decode()
logger.info(
"Creating new blob", sk=hexlify(sk).decode(), nonce=hexlify(nonce).decode(), encrypted_blob=encrypted_blob
)
return encrypted_blob