Implement HMAC based on GOST 34.11-2012 Streebog-512 as well as a test
case for it. Both the PyGOST + hmac python module and the VeraCrypt HMAC
for Streebog-512 were used as references. The kernels expect the digests
to be in big-endian order according to the RFC examples for Streebog.
Fix two bugs from commit 224315dd62.
- Add hash-mode 11850: HMAC-Streebog-512 (key = $pass), big-endian
- Add test case for hash-mode 11850
- Bugfix for a3-pure Streebog kernels (modes 11700 and 11800)
- Rename a few Streebog constants in interface.h
Complete Streebog support with pure kernels that allow for passwords
longer than 64 characters. Provide generic inc_hash_streebog files
for future Streebog-based hash modes (HMAC, PBKDF2, VeraCrypt).
Include streebog support in the test suite. For this, python module
PyGOST is needed. Also add clarification to hash mode description
stating that Streebog hashes are expected in big-endian byte order.
There are several implementations, including PyGOST, which default
to little-endian byte order, while the RFC examples are big-endian.
- Add pure kernels for hash-mode 11700 (Streebog-256)
- Add pure kernels for hash-mode 11800 (Streebog-512)
- Tests: Add hash-modes 11700 (Streebog-256) and 11800 (Streebog-512)
