Implementation of GOST encryption algorithm

A. GOST algorithm

The Gost (Gosudarstvennyi Standard) algorithm is a block cipher algorithm designed by the former Soviet Union, which is similar to the DES algorithm. She is a 64-bit grouping and 256-bit key with a 32-wheel simple iterative encryption algorithm. The DES algorithm uses a 56-bit long key, in cryptography, the security of a symmetric cipher system is determined by the strength and length of the algorithm, and in ensuring that the algorithm is strong enough (the only way to attack a cryptographic system is to use the exhaustive method to test all possible keys) The length of the key directly determines the complexity of the brute-lift attack:

When the GOST key is poor, I think it's going to be another big bang:-)

Principle of 1.1 GOST algorithm

1.1.1 Key Generation

The GOST algorithm uses a 256-bit long key and the key is entered by the user:

Divide the 256-bit key into 8 parts, 32 bits per section