pedroalbanese/vko

GOST R 34.10-2012 Key Agreement Function (RFC 7836)

VKO

GOST R 34.10-2012 VKO (выработка ключа общего)

VKO is an elliptic curve Diffie-Hellman key agreement function using GOST R 34.10-2012. It allows two parties to jointly agree on a shared secret using an insecure channel.

            Alice                            Bob
            -----                            ---
      choose private key:             choose private key:
             d_A                             d_B
              |                               |
              v                               v
      compute public key:             compute public key:
    Q_A = d_A * BasePoint_TE        Q_B = d_B * BasePoint_TE
              |                               |
              v                               v
          ------- Begin Key Exchange Phase -------
              |                               |
              v                               v
     compute shared secret:          compute shared secret:
S_A = d_A * Q_B + d_A * BasePoint S_B = d_B * Q_A + d_B * BasePoint
              |                               |
              v                               v
          -------- End Key Exchange Phase --------
              |                               |
              v                               v
            (S_A)                           (S_B)

Command-line VKO Tool:

Usage of vko:
  -key string
        Our private key.
  -keygen
        Generate keypair.
  -paramset string
        ParamSet: A, B, C or D. (default "A")
  -pub string
        Remote's side public key.

Examples:

./vko -keygen // 2x
./vko -key $2ndprivatekey -pub $1stpublickey
./vko -key $1stprivatekey -pub $2ndpublickey

License

This project is licensed under the ISC License.

Copyright (c) 2020-2021 Pedro Albanese - ALBANESE Research Lab.