This is the EuCrypt library that Eulora server (S.MG) uses for its communication needs. 

To understand EuCrypt, start from http://www.dianacoman.com/2017/12/07/introducing-eucrypt/

Components:
1. mpi
  Arbitrary length integers and operations.
  Implemented in C.

2. smg_bit_keccak
  Bit-level implementation of the Keccak sponge according to The Keccak Reference v 3.0.
  Implemented in Ada.

3. smg_keccak
  Word (64 bits) level implementation of the Keccak sponge according to The Keccak Reference v 3.0. 
  Implemented in Ada.

4. smg_serpent
  Serpent hash method.
  Implemented in Ada.

5. smg_rsa
  RSA implementation using TMSR specification.
  Implemented in C.

6. smg_comm
  Communications for Eulora (server <-> client). Relies on all the other components.