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handlers = (
lambda c, p: (serialization.load_der_private_key(c, p), False),
lambda c, p: (serialization.load_pem_private_key(c, p), False),
lambda c, _: (serialization.load_der_public_key(c), True),
lambda c, _: (serialization.load_pem_public_key(c), True),
)
for key in self:
key.pem_key = None
key.public = None
key.loading_error = ""
if not (content := key.content.content):
continue
pwd = key.password.encode('utf-8') if key.password else None
loading_error = self.env._("This key could not be loaded. Either its content or its password is erroneous.")
for handler in handlers:
try:
pkey, key.public = handler(content, pwd)
break
except (TypeError, ValueError):
pass
else:
key.loading_error = loading_error
continue
if key.public:
key.pem_key = BinaryBytes(pkey.public_bytes(
encoding=Encoding.PEM,
format=serialization.PublicFormat.SubjectPublicKeyInfo,
))
else:
encryption = serialization.BestAvailableEncryption(pwd) if pwd else serialization.NoEncryption()
key.pem_key = BinaryBytes(pkey.private_bytes(
encoding=Encoding.PEM,
format=serialization.PrivateFormat.PKCS8,
encryption_algorithm=encryption,
))
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