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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2021 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SHRPX_QUIC_H
#define SHRPX_QUIC_H
#include "shrpx.h"
#include <stdint.h>
#include <functional>
#include <optional>
#include <span>
#include <openssl/evp.h>
#include <ngtcp2/ngtcp2.h>
#include "network.h"
using namespace nghttp2;
namespace std {
template <> struct hash<ngtcp2_cid> {
std::size_t operator()(const ngtcp2_cid &cid) const noexcept {
// FNV-1a 64bits variant
constexpr uint64_t basis = 0xCBF29CE484222325ULL;
const uint8_t *p = cid.data, *end = cid.data + cid.datalen;
uint64_t h = basis;
for (; p != end;) {
h ^= *p++;
h *= basis;
}
return static_cast<size_t>(h);
}
};
} // namespace std
bool operator==(const ngtcp2_cid &lhs, const ngtcp2_cid &rhs);
namespace shrpx {
struct UpstreamAddr;
struct QUICKeyingMaterials;
struct QUICKeyingMaterial;
constexpr size_t SHRPX_QUIC_CID_WORKER_ID_OFFSET = 1;
constexpr size_t SHRPX_QUIC_SERVER_IDLEN = 4;
constexpr size_t SHRPX_QUIC_SOCK_IDLEN = 4;
constexpr size_t SHRPX_QUIC_WORKER_IDLEN =
SHRPX_QUIC_SERVER_IDLEN + SHRPX_QUIC_SOCK_IDLEN;
constexpr size_t SHRPX_QUIC_CLIENT_IDLEN = 8;
constexpr size_t SHRPX_QUIC_DECRYPTED_DCIDLEN =
SHRPX_QUIC_WORKER_IDLEN + SHRPX_QUIC_CLIENT_IDLEN;
constexpr size_t SHRPX_QUIC_SCIDLEN =
SHRPX_QUIC_CID_WORKER_ID_OFFSET + SHRPX_QUIC_DECRYPTED_DCIDLEN;
constexpr size_t SHRPX_QUIC_CID_ENCRYPTION_KEYLEN = 16;
constexpr size_t SHRPX_QUIC_CONN_CLOSE_PKTLEN = 256;
constexpr size_t SHRPX_QUIC_STATELESS_RESET_BURST = 100;
constexpr size_t SHRPX_QUIC_SECRET_RESERVEDLEN = 4;
constexpr size_t SHRPX_QUIC_SECRETLEN = 32;
constexpr size_t SHRPX_QUIC_SALTLEN = 32;
constexpr uint8_t SHRPX_QUIC_DCID_KM_ID_MASK = 0xe0;
struct WorkerID {
union {
struct {
uint32_t server;
uint16_t worker_process;
uint16_t thread;
};
uint64_t worker;
};
};
static_assert(sizeof(WorkerID) == SHRPX_QUIC_WORKER_IDLEN,
"WorkerID length assertion failure");
inline bool operator==(const WorkerID &lhd, const WorkerID &rhd) {
return lhd.worker == rhd.worker;
}
inline bool operator!=(const WorkerID &lhd, const WorkerID &rhd) {
return lhd.worker != rhd.worker;
}
struct ConnectionID {
WorkerID worker;
uint64_t client;
};
ngtcp2_tstamp quic_timestamp();
int quic_send_packet(const UpstreamAddr *faddr, const sockaddr *remote_sa,
size_t remote_salen, const sockaddr *local_sa,
size_t local_salen, const ngtcp2_pkt_info &pi,
std::span<const uint8_t> data, size_t gso_size);
int generate_quic_retry_connection_id(ngtcp2_cid &cid, uint32_t server_id,
uint8_t km_id, EVP_CIPHER_CTX *ctx);
int generate_quic_connection_id(ngtcp2_cid &cid, const WorkerID &wid,
uint8_t km_id, EVP_CIPHER_CTX *ctx);
int encrypt_quic_connection_id(uint8_t *dest, const uint8_t *src,
EVP_CIPHER_CTX *ctx);
int decrypt_quic_connection_id(ConnectionID &dest, const uint8_t *src,
EVP_CIPHER_CTX *ctx);
int generate_quic_hashed_connection_id(ngtcp2_cid &dest,
const Address &remote_addr,
const Address &local_addr,
const ngtcp2_cid &cid);
int generate_quic_stateless_reset_token(uint8_t *token, const ngtcp2_cid &cid,
const uint8_t *secret,
size_t secretlen);
std::optional<std::span<const uint8_t>>
generate_retry_token(std::span<uint8_t> token, uint32_t version,
const sockaddr *sa, socklen_t salen,
const ngtcp2_cid &retry_scid, const ngtcp2_cid &odcid,
std::span<const uint8_t> secret);
int verify_retry_token(ngtcp2_cid &odcid, std::span<const uint8_t> token,
uint32_t version, const ngtcp2_cid &dcid,
const sockaddr *sa, socklen_t salen,
std::span<const uint8_t> secret);
std::optional<std::span<const uint8_t>>
generate_token(std::span<uint8_t> token, const sockaddr *sa, size_t salen,
std::span<const uint8_t> secret, uint8_t km_id);
int verify_token(std::span<const uint8_t> token, const sockaddr *sa,
socklen_t salen, std::span<const uint8_t> secret);
int generate_quic_connection_id_encryption_key(std::span<uint8_t> key,
std::span<const uint8_t> secret,
std::span<const uint8_t> salt);
const QUICKeyingMaterial *
select_quic_keying_material(const QUICKeyingMaterials &qkms, uint8_t km_id);
} // namespace shrpx
#endif // SHRPX_QUIC_H
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