New port: security/akmos.

Akmos is a cryptographic library with CLI.

It supports:

• symmetric ciphering;
• computing message digests (hashes);
• calculating a message authentication code (MAC);

Depends only on the standard C library.
Primary develop for the x86_64 architecture.

WWW: https://github.com/melanhit/akmos

PR: 206987
Submitted by: Andrew Romanenko <melanhit@gmail.com>