Function sphinx_compressed_onion_deserialize

common/sphinx.c:964–989

}

struct sphinx_compressed_onion *
sphinx_compressed_onion_deserialize(const tal_t *ctx, const u8 *src)
{
	const u8 *cursor = src;
	size_t max = tal_bytelen(src);
	struct sphinx_compressed_onion *dst =
	    tal(ctx, struct sphinx_compressed_onion);

	/* This is not a compressed onion, so let's not parse it. */
	if (max > TOTAL_PACKET_SIZE(ROUTING_INFO_SIZE))
		return tal_free(dst);

	dst->version = fromwire_u8(&cursor, &max);
	if (dst->version != 0x00)
		return tal_free(dst);

	fromwire_pubkey(&cursor, &max, &dst->ephemeralkey);
	dst->routinginfo = fromwire_tal_arrn(dst, &cursor, &max, max - HMAC_SIZE);
	fromwire_hmac(&cursor, &max, &dst->hmac);

	/* If at any point we failed to pull from the serialized compressed
	 * onion the entire deserialization is considered to have failed. */
	if (cursor == NULL)
		return tal_free(dst);
	return dst;
}