First stable version with all ciphers

Modified

• Breaking change from previous versions: removed total_output_len
  parameters from the functions

  • ascon_aead*_encrypt()
  • ascon_aead*_decrypt()
  • ascon_aead*_encrypt_final()
  • ascon_aead*_decrypt_final()
    and from the ascon_bufstate_t struct, making it 8 B smaller.
    Why? TL;DR it's redundant.

  The reasoning is that the user of the first two (offline processing)
  already knows the length of the plaintext/ciphertext; the user of the second
  two obtains the length of the processed chunks as return values so they
  can simply sum the up - and anyhow the user known the length of all the
  chunks provided to the cipher; those could be summed up to. In most of the
  cases the argument was NULL in the function usage. For details on how to
  obtain the total length, the example in the Readme should suffice.

• Renamed all files in src so they start with ascon_.

Fixed

• Added more tests to cover more branching cases of the online-buffering
  algorithm.
• Removal of some minor warnings after inspection with static analyser
  (scan-build) and CLion code inspection tool.
• Typos
• Added missing Known limitations paragraphs to the previous releases
  in this Changelog.

Known limitations

• Because LibAscon is implemented with reuse of existing functions in mind,
  in order to spare on code size and with the Init-Update-Digest paradigm,
  which has some internal buffering, the cipher is about 4x slower than the
  reference implementation (ref).
• There is no architecture-specific optimisation, only a generic portable
  implementation using mostly uint64_t data types.