def _prep_non_framed(self):
"""Prepare the opening data for a non-framed message."""
try:
plaintext_length = self.stream_length
self.__unframed_plaintext_cache = self.source_stream
except NotSupportedError:
# We need to know the plaintext length before we can start processing the data.
# If we cannot seek on the source then we need to read the entire source into memory.
self.__unframed_plaintext_cache = io.BytesIO()
self.__unframed_plaintext_cache.write(self.source_stream.read())
plaintext_length = self.__unframed_plaintext_cache.tell()
self.__unframed_plaintext_cache.seek(0)
aad_content_string = aws_encryption_sdk.internal.utils.get_aad_content_string(
content_type=self.content_type, is_final_frame=True
)
associated_data = assemble_content_aad(
message_id=self._header.message_id,
aad_content_string=aad_content_string,
seq_num=1,
length=plaintext_length,
)
self.encryptor = Encryptor(
algorithm=self._encryption_materials.algorithm,
key=self._derived_data_key,
associated_data=associated_data,
iv=non_framed_body_iv(self._encryption_materials.algorithm),
)
self.output_buffer += serialize_non_framed_open(
algorithm=self._encryption_materials.algorithm,
iv=self.encryptor.iv,
plaintext_length=plaintext_length,
signer=self.signer,
)
def _prep_non_framed(self):
"""Prepare the opening data for a non-framed message."""
aad_content_string = aws_encryption_sdk.internal.utils.get_aad_content_string(
content_type=self.content_type, is_final_frame=True)
associated_data = aws_encryption_sdk.internal.formatting.encryption_context.assemble_content_aad(
message_id=self._header.message_id,
aad_content_string=aad_content_string,
seq_num=1,
length=self.stream_length)
self.encryptor = Encryptor(
algorithm=self._encryption_materials.algorithm,
key=self._derived_data_key,
associated_data=associated_data,
iv=non_framed_body_iv(self._encryption_materials.algorithm))
self.output_buffer += aws_encryption_sdk.internal.formatting.serialize.serialize_non_framed_open(
algorithm=self._encryption_materials.algorithm,
iv=self.encryptor.iv,
plaintext_length=self.stream_length,
signer=self.signer)
def test_non_framed_body_iv():
assert non_framed_body_iv(ALGORITHM) == VALUES['ivs']['non_framed']
def test_non_framed_body_iv():
assert non_framed_body_iv(ALGORITHM) == VALUES["ivs"]["non_framed"]
