Backward incompatible changes:
- Support for Python 3.5 has been removed due to low usage and
maintenance burden.
- The GCM and AESGCM now require 64-bit to 1024-bit (8 byte to 128 byte)
initialization vectors. This change is to conform with an upcoming
OpenSSL release that will no longer support sizes outside this window.
- When deserializing asymmetric keys we now raise ValueError rather than
UnsupportedAlgorithm when an unsupported cipher is used. This change
is to conform with an upcoming OpenSSL release that will no longer
distinguish between error types.
- We no longer allow loading of finite field Diffie-Hellman parameters
of less than 512 bits in length. This change is to conform with an
upcoming OpenSSL release that no longer supports smaller sizes. These
keys were already wildly insecure and should not have been used in any
application outside of testing.
44b7d77591