def load_private_key_der(sk_der):
"""
Creates a :mod:`PrivateKey` object from a given ``DER`` encoded private key.
Args:
sk_der(:mod:`str`): a private key encoded in ``DER`` format.
Returns:
:mod:`PrivateKey`: A ``PrivateKey`` object.
Raises:
ValueError: if the provided ``pk_der`` data cannot be deserialized (wrong size or format).
TypeError: if the provided ``pk_der`` data is not a string.
"""
try:
sk = PrivateKey.from_der(sk_der)
return sk
except ValueError:
logger.error(
"The provided data cannot be deserialized (wrong size or format)"
)
except TypeError:
logger.error(
"The provided data cannot be deserialized (wrong type)")
return None
def from_der(cls, der):
"""
:param der: A private key previously encoded as DER.
:type der: ``bytes``
:rtype: :class:`~core.PrivateKey`
"""
return PrivateKey(ECPrivateKey.from_der(der))
def load_private_key_der(sk_der):
"""
Creates a :obj:`PrivateKey` from a given ``DER`` encoded private key.
Args:
sk_der(:obj:`str`): a private key encoded in ``DER`` format.
Returns:
:obj:`PrivateKey`: A ``PrivateKey`` object if the private key can be loaded.
Raises:
:obj:`InvalidKey`: if a ``PrivateKey`` cannot be loaded from the given data.
"""
try:
sk = PrivateKey.from_der(sk_der)
return sk
except ValueError:
raise InvalidKey(
"The provided key data cannot be deserialized (wrong size or format)"
)
except TypeError:
raise InvalidKey(
"The provided key data cannot be deserialized (wrong type)")
