size is 1600 bits, the rate is 1600 - c bits. rateK256 = (1600 - 256) / 8 rateK448 = (1600 - 448) / 8 rateK512 = (1600 - 512) / 8 rateK768 = (1600 - 768) / 8 rateK1024 = (1600 - 1024) / 8 ) // NewLegacyKeccak256 returns a new Digest computing the legacy, non-standard // Keccak-256 hash. func NewLegacyKeccak256() *Digest { return &Digest{rate: rateK512, outputLen: 32, dsbyte: dsbyteKeccak} } // NewLegacyKeccak512 returns a new Digest computing the legacy, non-standard // Keccak-512 hash. func NewLegacyKeccak512()...