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Univerxel/deps/picoquic/ticket_store.c

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#include "picoquic_internal.h"
/*
* Author: Christian Huitema
* Copyright (c) 2017, Private Octopus, Inc.
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Private Octopus, Inc. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "picoquic_internal.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
picoquic_stored_ticket_t* picoquic_format_ticket(uint64_t time_valid_until,
char const* sni, uint16_t sni_length, char const* alpn, uint16_t alpn_length,
uint8_t* ticket, uint16_t ticket_length, picoquic_tp_t const * tp)
{
size_t ticket_size = sizeof(picoquic_stored_ticket_t) + sni_length + 1 + alpn_length + 1 + ticket_length;
picoquic_stored_ticket_t* stored = (picoquic_stored_ticket_t*)malloc(ticket_size);
if (stored != NULL) {
char* next_p = ((char*)stored) + sizeof(picoquic_stored_ticket_t);
memset(stored, 0, ticket_size);
stored->time_valid_until = time_valid_until;
stored->sni = next_p;
stored->sni_length = sni_length;
memcpy(next_p, sni, sni_length);
next_p += sni_length;
*next_p++ = 0;
stored->alpn = next_p;
stored->alpn_length = alpn_length;
memcpy(next_p, alpn, alpn_length);
next_p += alpn_length;
*next_p++ = 0;
if (tp != NULL) {
stored->tp_0rtt[picoquic_tp_0rtt_max_data] = tp->initial_max_data;
stored->tp_0rtt[picoquic_tp_0rtt_max_stream_data_bidi_local] = tp->initial_max_stream_data_bidi_local;
stored->tp_0rtt[picoquic_tp_0rtt_max_stream_data_bidi_remote] = tp->initial_max_stream_data_bidi_remote;
stored->tp_0rtt[picoquic_tp_0rtt_max_stream_data_uni] = tp->initial_max_stream_data_uni;
stored->tp_0rtt[picoquic_tp_0rtt_max_streams_id_bidir] = tp->initial_max_stream_id_bidir;
stored->tp_0rtt[picoquic_tp_0rtt_max_streams_id_unidir] = tp->initial_max_stream_id_unidir;
}
stored->ticket = (uint8_t*)next_p;
stored->ticket_length = ticket_length;
memcpy(next_p, ticket, ticket_length);
}
return stored;
}
int picoquic_serialize_ticket(const picoquic_stored_ticket_t * ticket, uint8_t * bytes, size_t bytes_max, size_t * consumed)
{
int ret = 0;
size_t byte_index = 0;
size_t required_length;
/* Compute serialized length */
required_length = (size_t)(8 + 2 + 2 + 2) + ticket->sni_length + ticket->alpn_length + ticket->ticket_length;
/* Serialize */
if (required_length > bytes_max) {
ret = PICOQUIC_ERROR_FRAME_BUFFER_TOO_SMALL;
*consumed = 0;
} else {
picoformat_64(bytes + byte_index, ticket->time_valid_until);
byte_index += 8;
picoformat_16(bytes + byte_index, ticket->sni_length);
byte_index += 2;
memcpy(bytes + byte_index, ticket->sni, ticket->sni_length);
byte_index += ticket->sni_length;
picoformat_16(bytes + byte_index, ticket->alpn_length);
byte_index += 2;
memcpy(bytes + byte_index, ticket->alpn, ticket->alpn_length);
byte_index += ticket->alpn_length;
for (int i = 0; i < PICOQUIC_NB_TP_0RTT; i++) {
picoformat_64(bytes + byte_index, ticket->tp_0rtt[i]);
byte_index += 8;
}
picoformat_16(bytes + byte_index, ticket->ticket_length);
byte_index += 2;
memcpy(bytes + byte_index, ticket->ticket, ticket->ticket_length);
byte_index += ticket->ticket_length;
*consumed = byte_index;
}
return ret;
}
int picoquic_deserialize_ticket(picoquic_stored_ticket_t ** ticket, uint8_t * bytes, size_t bytes_max, size_t * consumed)
{
int ret = 0;
uint64_t time_valid_until = 0;
size_t required_length = 8 + 2 + 2 + PICOQUIC_NB_TP_0RTT * 8 + 2;
size_t byte_index = 0;
size_t sni_index = 0;
size_t alpn_index = 0;
size_t ticket_index = 0;
uint16_t sni_length = 0;
uint16_t alpn_length = 0;
uint16_t ticket_length = 0;
uint64_t tp_0rtt[PICOQUIC_NB_TP_0RTT] = { 0, 0, 0, 0, 0, 0 };
*consumed = 0;
*ticket = NULL;
if (required_length < bytes_max) {
time_valid_until = PICOPARSE_64(bytes);
byte_index = 8;
sni_length = PICOPARSE_16(bytes + byte_index);
byte_index += 2;
sni_index = byte_index;
required_length += sni_length;
byte_index += sni_length;
}
if (required_length < bytes_max) {
alpn_length = PICOPARSE_16(bytes + byte_index);
byte_index += 2;
alpn_index = byte_index;
required_length += alpn_length;
byte_index += alpn_length;
}
if (required_length < bytes_max) {
for (int i = 0; i < PICOQUIC_NB_TP_0RTT; i++) {
tp_0rtt[i] = PICOPARSE_64(bytes + byte_index);
byte_index += 8;
}
}
if (required_length < bytes_max) {
ticket_length = PICOPARSE_16(bytes + byte_index);
byte_index += 2;
ticket_index = byte_index;
required_length += ticket_length;
}
if (required_length > bytes_max) {
*ticket = NULL;
ret = PICOQUIC_ERROR_INVALID_TICKET;
} else {
*ticket = picoquic_format_ticket(time_valid_until, (const char *)(bytes + sni_index), sni_length,
(const char *)(bytes + alpn_index), alpn_length, bytes + ticket_index, ticket_length, NULL);
if (*ticket == NULL) {
ret = PICOQUIC_ERROR_MEMORY;
}
else {
for (int i=0; i< PICOQUIC_NB_TP_0RTT; i++) {
(*ticket)->tp_0rtt[i] = tp_0rtt[i];
}
*consumed = required_length;
}
}
return ret;
}
int picoquic_store_ticket(picoquic_stored_ticket_t** pp_first_ticket,
uint64_t current_time,
char const* sni, uint16_t sni_length, char const* alpn, uint16_t alpn_length,
uint8_t* ticket, uint16_t ticket_length, picoquic_tp_t const * tp)
{
int ret = 0;
if (ticket_length < 17) {
ret = PICOQUIC_ERROR_INVALID_TICKET;
} else {
uint64_t ticket_issued_time;
uint64_t ttl_seconds;
uint64_t time_valid_until;
ticket_issued_time = PICOPARSE_64(ticket);
ttl_seconds = PICOPARSE_32(ticket + 13);
if (ttl_seconds > (7 * 24 * 3600)) {
ttl_seconds = (7 * 24 * 3600);
}
time_valid_until = (ticket_issued_time * 1000) + (ttl_seconds * 1000000);
if (current_time != 0 && time_valid_until < current_time) {
ret = PICOQUIC_ERROR_INVALID_TICKET;
} else {
picoquic_stored_ticket_t* stored = picoquic_format_ticket(time_valid_until, sni, sni_length,
alpn, alpn_length, ticket, ticket_length, tp);
if (stored == NULL) {
ret = PICOQUIC_ERROR_MEMORY;
}
else {
picoquic_stored_ticket_t* next;
picoquic_stored_ticket_t** pprevious;
stored->next_ticket = next = *pp_first_ticket;
*pp_first_ticket = stored;
pprevious = &stored->next_ticket;
/* Now remove the old tickets for that SNI & ALPN */
while (next != NULL) {
if (next->time_valid_until <= stored->time_valid_until && next->sni_length == sni_length && next->alpn_length == alpn_length && memcmp(next->sni, sni, sni_length) == 0 && memcmp(next->alpn, alpn, alpn_length) == 0) {
picoquic_stored_ticket_t* deleted = next;
next = next->next_ticket;
*pprevious = next;
memset(&deleted->ticket, 0, deleted->ticket_length);
free(deleted);
} else {
pprevious = &next->next_ticket;
next = next->next_ticket;
}
}
}
}
}
return ret;
}
int picoquic_get_ticket(picoquic_stored_ticket_t* p_first_ticket,
uint64_t current_time,
char const* sni, uint16_t sni_length, char const* alpn, uint16_t alpn_length,
uint8_t** ticket, uint16_t* ticket_length, picoquic_tp_t * tp, int mark_used)
{
int ret = 0;
picoquic_stored_ticket_t* next = p_first_ticket;
while (next != NULL) {
if (next->time_valid_until > current_time && next->sni_length == sni_length && next->alpn_length == alpn_length && memcmp(next->sni, sni, sni_length) == 0 && memcmp(next->alpn, alpn, alpn_length) == 0 && next->was_used == 0) {
break;
} else {
next = next->next_ticket;
}
}
if (next == NULL) {
*ticket = NULL;
*ticket_length = 0;
ret = -1;
} else {
if (tp != NULL) {
tp->initial_max_data = next->tp_0rtt[picoquic_tp_0rtt_max_data];
tp->initial_max_stream_data_bidi_local = next->tp_0rtt[picoquic_tp_0rtt_max_stream_data_bidi_local];
tp->initial_max_stream_data_bidi_remote = next->tp_0rtt[picoquic_tp_0rtt_max_stream_data_bidi_remote];
tp->initial_max_stream_data_uni = next->tp_0rtt[picoquic_tp_0rtt_max_stream_data_uni];
tp->initial_max_stream_id_bidir = next->tp_0rtt[picoquic_tp_0rtt_max_streams_id_bidir];
tp->initial_max_stream_id_unidir = next->tp_0rtt[picoquic_tp_0rtt_max_streams_id_unidir];
}
*ticket = next->ticket;
*ticket_length = next->ticket_length;
next->was_used = mark_used;
}
return ret;
}
int picoquic_save_tickets(const picoquic_stored_ticket_t* first_ticket,
uint64_t current_time,
char const* ticket_file_name)
{
int ret = 0;
FILE* F = NULL;
const picoquic_stored_ticket_t* next = first_ticket;
if ((F = picoquic_file_open(ticket_file_name, "wb")) == NULL) {
ret = -1;
} else {
while (ret == 0 && next != NULL) {
/* Only store the tickets that are valid going forward */
if (next->time_valid_until > current_time && next->was_used == 0) {
/* Compute the serialized size */
uint8_t buffer[2048];
size_t record_size;
ret = picoquic_serialize_ticket(next, buffer, sizeof(buffer), &record_size);
if (ret == 0) {
if (fwrite(&record_size, 4, 1, F) != 1 || fwrite(buffer, 1, record_size, F) != record_size) {
ret = PICOQUIC_ERROR_INVALID_FILE;
break;
}
}
}
next = next->next_ticket;
}
(void)picoquic_file_close(F);
}
return ret;
}
int picoquic_load_tickets(picoquic_stored_ticket_t** pp_first_ticket,
uint64_t current_time, char const* ticket_file_name)
{
int ret = 0;
int file_err = 0;
FILE* F = NULL;
picoquic_stored_ticket_t* previous = NULL;
picoquic_stored_ticket_t* next = NULL;
uint32_t record_size;
uint32_t storage_size;
if ((F = picoquic_file_open_ex(ticket_file_name, "rb", &file_err)) == NULL) {
ret = (file_err == ENOENT) ? PICOQUIC_ERROR_NO_SUCH_FILE : -1;
}
while (ret == 0) {
if (fread(&storage_size, 4, 1, F) != 1) {
/* end of file */
break;
}
else if (storage_size > 2048 ||
(record_size = storage_size + offsetof(struct st_picoquic_stored_ticket_t, time_valid_until)) > 2048) {
ret = PICOQUIC_ERROR_INVALID_FILE;
break;
}
else {
uint8_t buffer[2048];
if (fread(buffer, 1, storage_size, F)
!= storage_size) {
ret = PICOQUIC_ERROR_INVALID_FILE;
}
else {
size_t consumed = 0;
ret = picoquic_deserialize_ticket(&next, buffer, storage_size, &consumed);
if (ret == 0 && (consumed != storage_size || next == NULL)) {
ret = PICOQUIC_ERROR_INVALID_FILE;
}
if (ret == 0 && next != NULL) {
if (next->time_valid_until < current_time) {
free(next);
next = NULL;
}
else {
next->sni = ((char*)next) + sizeof(picoquic_stored_ticket_t);
next->alpn = next->sni + next->sni_length + 1;
next->ticket = (uint8_t*)(next->alpn + next->alpn_length + 1);
next->next_ticket = NULL;
if (previous == NULL) {
*pp_first_ticket = next;
}
else {
previous->next_ticket = next;
}
previous = next;
}
}
}
}
}
picoquic_file_close(F);
return ret;
}
void picoquic_free_tickets(picoquic_stored_ticket_t** pp_first_ticket)
{
picoquic_stored_ticket_t* next;
while ((next = *pp_first_ticket) != NULL) {
*pp_first_ticket = next->next_ticket;
free(next);
}
}
int picoquic_save_session_tickets(picoquic_quic_t* quic, char const* ticket_store_filename)
{
return picoquic_save_tickets(quic->p_first_ticket, picoquic_get_quic_time(quic), ticket_store_filename);
}
int picoquic_load_retry_tokens(picoquic_quic_t* quic, char const* token_store_filename)
{
return picoquic_load_tokens(&quic->p_first_token, picoquic_get_quic_time(quic), token_store_filename);
}
int picoquic_save_retry_tokens(picoquic_quic_t* quic, char const* ticket_store_filename)
{
return picoquic_save_tokens(quic->p_first_token, picoquic_get_quic_time(quic), ticket_store_filename);
}
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