sealGeneric(out []byte, g *GCM, nonce, plaintext, additionalData []byte) { var H, counter, tagMask [gcmBlockSize]byte aes.EncryptBlockInternal(&g.cipher, H[:], H[:]) deriveCounterGeneric(&H, &counter, nonce) gcmCounterCryptGener(&g.cipher, tagMask[:], tagMask[:], &counter) gcmCounterCryptGener(&g.cipher, out, plaintext, &counter) var tag [gcmTagSize]byte gcmAuthGeneric(tag[:], &H, &tagMask, out[:len(plaintext)], additionalData) copy(out[len(plaintext):], tag[:]) } func openGeneric(out []byte, g *GCM,...