def serialize_data(self, obj, encrypt=True):
"""Serialize secrets for storage on the card"""
r = b""
for k in self.KEYS:
v = self.KEYS[k]
if v in obj:
r += k + bytes([len(obj[v])]) + obj[v]
if encrypt:
# smartcard encryption key
key = tagged_hash("scenc", self.secret)
# smartcard id to understand it's our data
fingerprint = tagged_hash("scid", self.secret)[:4]
res = aead_encrypt(key, self.MAGIC + fingerprint, r)
else:
# "unencrypted" data
fingerprint = b"\x00" * 4
res = aead_encrypt(b"\xcc" * 32, self.MAGIC + fingerprint, r)
return res
def save_aead(self, path, adata=b"", plaintext=b"", key=None):
"""Encrypts and saves plaintext and associated data to file"""
if key is None:
key = self.idkey
if key is None:
raise KeyStoreError("Pass the key please")
d = aead_encrypt(key, adata, plaintext)
with open(path, "wb") as f:
f.write(d)
platform.sync()
def serialize_data(self, obj):
"""Serialize secrets for storage on the card"""
r = b""
for k in self.KEYS:
v = self.KEYS[k]
if v in obj:
r += k + bytes([len(obj[v])]) + obj[v]
# smartcard encryption key
key = tagged_hash("scenc", self.secret)
# smartcard id to understand it's our data
fingerprint = tagged_hash("scid", self.secret)[:4]
res = aead_encrypt(key, self.MAGIC + fingerprint, r)
print(res)
return res