sha3.New512() g.Write(m[:]) g.Write(ek.h[:]) G := g.Sum(nil) K, r := G[:SharedKeySize], G[SharedKeySize:] c = pkeEncrypt(cc, &ek.encryptionKey, m, r) return K, c } // NewEncapsulationKey7 parses an encapsulation key from its encoded form. // If the encapsulation key is not valid, NewEncapsulationKey7 returns an error. func NewEncapsulationKey7(encapsulationKey []byte) (*EncapsulationKey768, error) { // The actual logic is in a separate function to outline this allocation. ek := &EncapsulationKey768{} return...