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Password unlocking changes #18

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Sep 11, 2024
Merged

Password unlocking changes #18

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102 changes: 56 additions & 46 deletions bittensor_wallet/keyfile.py
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Original file line number Diff line number Diff line change
Expand Up @@ -303,54 +303,64 @@ def decrypt_keyfile_data(
if coldkey_name is not None and password is None:
password = get_coldkey_password_from_environment(coldkey_name)

try:
password = (
getpass.getpass("Enter password to unlock key: ")
if password is None
else password
)
with console.status(":key: Decrypting key..."):
# NaCl SecretBox decrypt.
if keyfile_data_is_encrypted_nacl(keyfile_data):
password = bytes(password, "utf-8")
kdf = pwhash.argon2i.kdf
key = kdf(
secret.SecretBox.KEY_SIZE,
password,
NACL_SALT,
opslimit=pwhash.argon2i.OPSLIMIT_SENSITIVE,
memlimit=pwhash.argon2i.MEMLIMIT_SENSITIVE,
)
box = secret.SecretBox(key)
decrypted_keyfile_data = box.decrypt(keyfile_data[len("$NACL") :])
# Ansible decrypt.
elif keyfile_data_is_encrypted_ansible(keyfile_data):
vault = Vault(password)
try:
finished_password_input = False
while not finished_password_input:
try:
password_input: str = (
getpass.getpass("Enter password to unlock key: ")
if password is None
else password
)
with console.status(":key: Decrypting key..."):
# NaCl SecretBox decrypt.
if keyfile_data_is_encrypted_nacl(keyfile_data):
password = bytes(password_input, "utf-8")
kdf = pwhash.argon2i.kdf
key = kdf(
secret.SecretBox.KEY_SIZE,
password,
NACL_SALT,
opslimit=pwhash.argon2i.OPSLIMIT_SENSITIVE,
memlimit=pwhash.argon2i.MEMLIMIT_SENSITIVE,
)
box = secret.SecretBox(key)
decrypted_keyfile_data = box.decrypt(keyfile_data[len("$NACL") :])
finished_password_input = True

# Ansible decrypt.
elif keyfile_data_is_encrypted_ansible(keyfile_data):
vault = Vault(password)
decrypted_keyfile_data = vault.load(keyfile_data)
except AnsibleVaultError:
raise KeyFileError("Invalid password")
# Legacy decrypt.
elif keyfile_data_is_encrypted_legacy(keyfile_data):
__SALT = (
b"Iguesscyborgslikemyselfhaveatendencytobeparanoidaboutourorigins"
)
kdf = PBKDF2HMAC(
algorithm=hashes.SHA256(),
salt=__SALT,
length=32,
iterations=10000000,
backend=default_backend(),
)
key = base64.urlsafe_b64encode(kdf.derive(password.encode()))
cipher_suite = Fernet(key)
decrypted_keyfile_data = cipher_suite.decrypt(keyfile_data)
# Unknown.
finished_password_input = True

# Legacy decrypt.
elif keyfile_data_is_encrypted_legacy(keyfile_data):
__SALT = b"Iguesscyborgslikemyselfhaveatendencytobeparanoidaboutourorigins"
kdf = PBKDF2HMAC(
algorithm=hashes.SHA256(),
salt=__SALT,
length=32,
iterations=10000000,
backend=default_backend(),
)
key = base64.urlsafe_b64encode(kdf.derive(password.encode()))
cipher_suite = Fernet(key)
decrypted_keyfile_data = cipher_suite.decrypt(keyfile_data)
finished_password_input = True
# Unknown.
else:
raise KeyFileError(f"keyfile data: {str(keyfile_data)} is corrupt")

except (InvalidSignature, InvalidKey, InvalidToken, AnsibleVaultError):
console.print("Wrong password, try again")
password = None

except Exception as e:
if "Decryption failed. Ciphertext failed verification" in str(e):
console.print("Wrong password, try again")
password = None
else:
raise KeyFileError(f"keyfile data: {keyfile_data.decode()} is corrupt.")

except (InvalidSignature, InvalidKey, InvalidToken):
raise KeyFileError("Invalid password")
raise

if not isinstance(decrypted_keyfile_data, bytes):
decrypted_keyfile_data = json.dumps(decrypted_keyfile_data).encode()
Expand Down