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GOST 28147-89 cipher modes of operation ¶

Type of standard

Encryption and authentication modes

What modes are defined

• ECB
• CFB
• CTR
• MAC

RFC

5830

Features:

• 28147-89 MAC is completely unusable:
  • Reduced 16-round Magma cipher is used instead of 32 one.
  • Authenticating data does not have neither padding, nor length specifying, so MAC(0xDEAD) = MAC(0xDEAD00).
• Specified counter (CTR) mode increments counters with predefined constants for 32-bit halves of the block. This differs from simpler counter mode implementations.