uint64(len(nonce)), uint64(0)) } aes.EncryptBlockInternal(&g.cipher, tagMask[:], counter[:]) var tagOut [gcmTagSize]byte gcmAesData(&g.productTable, data, &tagOut) if len(plaintext) > 0 { gcmAesEnc(&g.productTable, out, plaintext, &counter, &tagOut, aes.EncryptionKeySchedul(&g.cipher)) } gcmAesFinish(&g.productTable, &tagMask, &tagOut, uint64(len(plaintext)), uint64(len(data))) copy(out[len(plaintext):], tagOut[:]) } func open(out []byte, g *GCM, nonce, ciphertext, data []byte) error { if !supportsAESGCM...