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esp-idf/components/esp-tls/esp_tls.c
Aditya Patwardhan e957b50e50 fix(esp-tls): Reduce parameter check for esp_tls_conn_read 
Previously the *data parameters of esp_tls_conn_read
    was required to be non-NULL after espressif/esp-idf!28358.
    This prevents users from using a functionality in esp_tls_conn_read
    where calling `esp_tls_conn_read(ctx, NULL, 0);` triggers the
    transfer of contents from tcp layer to mbedtls (ssl) layer.
    After this the user can read the contents from
    esp_tls_get_bytes_avail().
    This commit removes the additional NULL check on the data field
    to keep this functionality enabled.
2024-08-23 12:08:42 +05:30

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/*
* SPDX-FileCopyrightText: 2019-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <http_parser.h>
#include "sdkconfig.h"
#include "esp_tls.h"
#include "esp_tls_private.h"
#include "esp_tls_platform_port.h"
#include "esp_tls_error_capture_internal.h"
#include <fcntl.h>
#include <errno.h>
#if CONFIG_IDF_TARGET_LINUX && !ESP_TLS_WITH_LWIP
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/time.h>
#ifdef __linux__
#include <linux/if.h>
#endif
#ifdef __APPLE__
#include <net/if.h>
#endif
typedef struct in_addr ip_addr_t;
typedef struct in6_addr ip6_addr_t;
#define ipaddr_ntoa(ipaddr) inet_ntoa(*ipaddr)
static inline char *ip6addr_ntoa(const ip6_addr_t *addr)
{
static char str[40];
return (char *)inet_ntop(AF_INET6, addr->s6_addr, str, 40);
}
#endif // CONFIG_IDF_TARGET_LINUX && !ESP_TLS_WITH_LWIP
static const char *TAG = "esp-tls";
#ifdef CONFIG_ESP_TLS_USING_MBEDTLS
#include "esp_tls_mbedtls.h"
#elif CONFIG_ESP_TLS_USING_WOLFSSL
#include "esp_tls_wolfssl.h"
#endif
#ifdef ESP_PLATFORM
#include <esp_log.h>
#else
#define ESP_LOGD(TAG, ...) //printf(__VA_ARGS__);
#define ESP_LOGE(TAG, ...) printf(__VA_ARGS__);
#endif
#ifdef CONFIG_ESP_TLS_USING_MBEDTLS
#define _esp_create_ssl_handle esp_create_mbedtls_handle
#define _esp_tls_handshake esp_mbedtls_handshake
#define _esp_tls_read esp_mbedtls_read
#define _esp_tls_write esp_mbedtls_write
#define _esp_tls_conn_delete esp_mbedtls_conn_delete
#define _esp_tls_net_init esp_mbedtls_net_init
#define _esp_tls_get_client_session esp_mbedtls_get_client_session
#define _esp_tls_free_client_session esp_mbedtls_free_client_session
#define _esp_tls_get_ssl_context esp_mbedtls_get_ssl_context
#define _esp_tls_server_session_create esp_mbedtls_server_session_create
#define _esp_tls_server_session_delete esp_mbedtls_server_session_delete
#define _esp_tls_server_session_ticket_ctx_init esp_mbedtls_server_session_ticket_ctx_init
#define _esp_tls_server_session_ticket_ctx_free esp_mbedtls_server_session_ticket_ctx_free
#define _esp_tls_get_bytes_avail esp_mbedtls_get_bytes_avail
#define _esp_tls_init_global_ca_store esp_mbedtls_init_global_ca_store
#define _esp_tls_set_global_ca_store esp_mbedtls_set_global_ca_store /*!< Callback function for setting global CA store data for TLS/SSL */
#define _esp_tls_get_global_ca_store esp_mbedtls_get_global_ca_store
#define _esp_tls_free_global_ca_store esp_mbedtls_free_global_ca_store /*!< Callback function for freeing global ca store for TLS/SSL */
#define _esp_tls_get_ciphersuites_list esp_mbedtls_get_ciphersuites_list
#elif CONFIG_ESP_TLS_USING_WOLFSSL /* CONFIG_ESP_TLS_USING_MBEDTLS */
#define _esp_create_ssl_handle esp_create_wolfssl_handle
#define _esp_tls_handshake esp_wolfssl_handshake
#define _esp_tls_read esp_wolfssl_read
#define _esp_tls_write esp_wolfssl_write
#define _esp_tls_conn_delete esp_wolfssl_conn_delete
#define _esp_tls_net_init esp_wolfssl_net_init
#define _esp_tls_server_session_create esp_wolfssl_server_session_create
#define _esp_tls_server_session_delete esp_wolfssl_server_session_delete
#define _esp_tls_get_bytes_avail esp_wolfssl_get_bytes_avail
#define _esp_tls_init_global_ca_store esp_wolfssl_init_global_ca_store
#define _esp_tls_set_global_ca_store esp_wolfssl_set_global_ca_store /*!< Callback function for setting global CA store data for TLS/SSL */
#define _esp_tls_free_global_ca_store esp_wolfssl_free_global_ca_store /*!< Callback function for freeing global ca store for TLS/SSL */
#define _esp_tls_get_ssl_context esp_wolfssl_get_ssl_context
#else /* ESP_TLS_USING_WOLFSSL */
#error "No TLS stack configured"
#endif
#if CONFIG_IDF_TARGET_LINUX
#define IPV4_ENABLED 1
#define IPV6_ENABLED 1
#else // CONFIG_IDF_TARGET_LINUX
#define IPV4_ENABLED CONFIG_LWIP_IPV4
#define IPV6_ENABLED CONFIG_LWIP_IPV6
#endif // !CONFIG_IDF_TARGET_LINUX
#define ESP_TLS_DEFAULT_CONN_TIMEOUT (10) /*!< Default connection timeout in seconds */
static esp_err_t create_ssl_handle(const char *hostname, size_t hostlen, const void *cfg, esp_tls_t *tls)
{
return _esp_create_ssl_handle(hostname, hostlen, cfg, tls, NULL);
}
static esp_err_t esp_tls_handshake(esp_tls_t *tls, const esp_tls_cfg_t *cfg)
{
return _esp_tls_handshake(tls, cfg);
}
static ssize_t tcp_read(esp_tls_t *tls, char *data, size_t datalen)
{
return recv(tls->sockfd, data, datalen, 0);
}
static ssize_t tcp_write(esp_tls_t *tls, const char *data, size_t datalen)
{
return send(tls->sockfd, data, datalen, 0);
}
ssize_t esp_tls_conn_read(esp_tls_t *tls, void *data, size_t datalen)
{
if (!tls) {
return -1;
}
return tls->read(tls, (char *)data, datalen);
}
ssize_t esp_tls_conn_write(esp_tls_t *tls, const void *data, size_t datalen)
{
if (!tls || !data) {
return -1;
}
return tls->write(tls, (char *)data, datalen);
}
/**
* @brief Close the TLS connection and free any allocated resources.
*/
int esp_tls_conn_destroy(esp_tls_t *tls)
{
if (tls != NULL) {
int ret = 0;
_esp_tls_conn_delete(tls);
if (tls->sockfd >= 0) {
ret = close(tls->sockfd);
}
esp_tls_internal_event_tracker_destroy(tls->error_handle);
free(tls);
tls = NULL;
return ret;
}
return -1; // invalid argument
}
esp_tls_t *esp_tls_init(void)
{
esp_tls_t *tls = (esp_tls_t *)calloc(1, sizeof(esp_tls_t));
if (!tls) {
return NULL;
}
tls->error_handle = esp_tls_internal_event_tracker_create();
if (!tls->error_handle) {
free(tls);
return NULL;
}
_esp_tls_net_init(tls);
tls->sockfd = -1;
return tls;
}
static esp_err_t esp_tls_hostname_to_fd(const char *host, size_t hostlen, int port, esp_tls_addr_family_t addr_family, struct sockaddr_storage *address, int* fd)
{
struct addrinfo *address_info;
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
switch (addr_family) {
case ESP_TLS_AF_INET:
hints.ai_family = AF_INET;
break;
case ESP_TLS_AF_INET6:
hints.ai_family = AF_INET6;
break;
default:
hints.ai_family = AF_UNSPEC;
break;
}
hints.ai_socktype = SOCK_STREAM;
char *use_host = strndup(host, hostlen);
if (!use_host) {
return ESP_ERR_NO_MEM;
}
ESP_LOGD(TAG, "host:%s: strlen %lu", use_host, (unsigned long)hostlen);
int res = getaddrinfo(use_host, NULL, &hints, &address_info);
if (res != 0 || address_info == NULL) {
ESP_LOGE(TAG, "couldn't get hostname for :%s: "
"getaddrinfo() returns %d, addrinfo=%p", use_host, res, address_info);
free(use_host);
return ESP_ERR_ESP_TLS_CANNOT_RESOLVE_HOSTNAME;
}
free(use_host);
*fd = socket(address_info->ai_family, address_info->ai_socktype, address_info->ai_protocol);
if (*fd < 0) {
ESP_LOGE(TAG, "Failed to create socket (family %d socktype %d protocol %d)", address_info->ai_family, address_info->ai_socktype, address_info->ai_protocol);
freeaddrinfo(address_info);
return ESP_ERR_ESP_TLS_CANNOT_CREATE_SOCKET;
}
#if IPV4_ENABLED
if (address_info->ai_family == AF_INET) {
struct sockaddr_in *p = (struct sockaddr_in *)address_info->ai_addr;
p->sin_port = htons(port);
ESP_LOGD(TAG, "[sock=%d] Resolved IPv4 address: %s", *fd, ipaddr_ntoa((const ip_addr_t*)&p->sin_addr.s_addr));
memcpy(address, p, sizeof(struct sockaddr ));
}
#endif
#if IPV4_ENABLED && IPV6_ENABLED
else
#endif
#if IPV6_ENABLED
if (address_info->ai_family == AF_INET6) {
struct sockaddr_in6 *p = (struct sockaddr_in6 *)address_info->ai_addr;
p->sin6_port = htons(port);
p->sin6_family = AF_INET6;
ESP_LOGD(TAG, "[sock=%d] Resolved IPv6 address: %s", *fd, ip6addr_ntoa((const ip6_addr_t*)&p->sin6_addr));
memcpy(address, p, sizeof(struct sockaddr_in6 ));
}
#endif
else {
ESP_LOGE(TAG, "Unsupported protocol family %d", address_info->ai_family);
close(*fd);
freeaddrinfo(address_info);
return ESP_ERR_ESP_TLS_UNSUPPORTED_PROTOCOL_FAMILY;
}
freeaddrinfo(address_info);
return ESP_OK;
}
static void ms_to_timeval(int timeout_ms, struct timeval *tv)
{
tv->tv_sec = timeout_ms / 1000;
tv->tv_usec = (timeout_ms % 1000) * 1000;
}
static esp_err_t esp_tls_set_socket_options(int fd, const esp_tls_cfg_t *cfg)
{
if (cfg) {
struct timeval tv = {};
if (cfg->timeout_ms > 0) {
ms_to_timeval(cfg->timeout_ms, &tv);
} else {
tv.tv_sec = ESP_TLS_DEFAULT_CONN_TIMEOUT;
tv.tv_usec = 0;
}
if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) != 0) {
ESP_LOGE(TAG, "Fail to setsockopt SO_RCVTIMEO");
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
if (setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) != 0) {
ESP_LOGE(TAG, "Fail to setsockopt SO_SNDTIMEO");
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
if (cfg->keep_alive_cfg && cfg->keep_alive_cfg->keep_alive_enable) {
int keep_alive_enable = 1;
int keep_alive_idle = cfg->keep_alive_cfg->keep_alive_idle;
int keep_alive_interval = cfg->keep_alive_cfg->keep_alive_interval;
int keep_alive_count = cfg->keep_alive_cfg->keep_alive_count;
ESP_LOGD(TAG, "Enable TCP keep alive. idle: %d, interval: %d, count: %d", keep_alive_idle, keep_alive_interval, keep_alive_count);
if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &keep_alive_enable, sizeof(keep_alive_enable)) != 0) {
ESP_LOGE(TAG, "Fail to setsockopt SO_KEEPALIVE");
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
#ifndef __APPLE__
if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &keep_alive_idle, sizeof(keep_alive_idle)) != 0) {
ESP_LOGE(TAG, "Fail to setsockopt TCP_KEEPIDLE");
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &keep_alive_interval, sizeof(keep_alive_interval)) != 0) {
ESP_LOGE(TAG, "Fail to setsockopt TCP_KEEPINTVL");
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &keep_alive_count, sizeof(keep_alive_count)) != 0) {
ESP_LOGE(TAG, "Fail to setsockopt TCP_KEEPCNT");
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
#else // __APPLE__
if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPALIVE, &keep_alive_idle, sizeof(keep_alive_idle)) != 0) {
ESP_LOGE(TAG, "Fail to setsockopt TCP_KEEPALIVE");
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
#endif // __APPLE__
}
if (cfg->if_name) {
if (cfg->if_name->ifr_name[0] != 0) {
ESP_LOGD(TAG, "Bind [sock=%d] to interface %s", fd, cfg->if_name->ifr_name);
#ifndef __APPLE__
if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, cfg->if_name, sizeof(struct ifreq)) != 0) {
#else
int idx = if_nametoindex(cfg->if_name->ifr_name);
if (setsockopt(fd, IPPROTO_IP, IP_BOUND_IF, &idx, sizeof(idx)) != 0) {
#endif
ESP_LOGE(TAG, "Bind [sock=%d] to interface %s fail", fd, cfg->if_name->ifr_name);
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
}
}
}
return ESP_OK;
}
static esp_err_t esp_tls_set_socket_non_blocking(int fd, bool non_blocking)
{
int flags;
if ((flags = fcntl(fd, F_GETFL, NULL)) < 0) {
ESP_LOGE(TAG, "[sock=%d] get file flags error: %s", fd, strerror(errno));
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
if (non_blocking) {
flags |= O_NONBLOCK;
} else {
flags &= ~O_NONBLOCK;
}
if (fcntl(fd, F_SETFL, flags) < 0) {
ESP_LOGE(TAG, "[sock=%d] set blocking/nonblocking error: %s", fd, strerror(errno));
return ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
}
return ESP_OK;
}
static inline esp_err_t tcp_connect(const char *host, int hostlen, int port, const esp_tls_cfg_t *cfg, esp_tls_error_handle_t error_handle, int *sockfd)
{
struct sockaddr_storage address;
int fd;
esp_tls_addr_family_t addr_family = (cfg != NULL) ? cfg->addr_family : ESP_TLS_AF_UNSPEC;
esp_err_t ret = esp_tls_hostname_to_fd(host, hostlen, port, addr_family, &address, &fd);
if (ret != ESP_OK) {
ESP_INT_EVENT_TRACKER_CAPTURE(error_handle, ESP_TLS_ERR_TYPE_SYSTEM, errno);
return ret;
}
// Set timeout options, keep-alive options and bind device options if configured
ret = esp_tls_set_socket_options(fd, cfg);
if (ret != ESP_OK) {
goto err;
}
// Set to non block before connecting to better control connection timeout
ret = esp_tls_set_socket_non_blocking(fd, true);
if (ret != ESP_OK) {
goto err;
}
ret = ESP_ERR_ESP_TLS_FAILED_CONNECT_TO_HOST;
ESP_LOGD(TAG, "[sock=%d] Connecting to server. HOST: %s, Port: %d", fd, host, port);
if (connect(fd, (struct sockaddr *)&address, sizeof(struct sockaddr)) < 0) {
if (errno == EINPROGRESS) {
fd_set fdset;
struct timeval tv = { .tv_usec = 0, .tv_sec = ESP_TLS_DEFAULT_CONN_TIMEOUT }; // Default connection timeout is 10 s
if (cfg && cfg->non_block) {
// Non-blocking mode -> just return successfully at this stage
*sockfd = fd;
return ESP_OK;
}
if ( cfg && cfg->timeout_ms > 0 ) {
ms_to_timeval(cfg->timeout_ms, &tv);
}
FD_ZERO(&fdset);
FD_SET(fd, &fdset);
int res = select(fd+1, NULL, &fdset, NULL, &tv);
if (res < 0) {
ESP_LOGE(TAG, "[sock=%d] select() error: %s", fd, strerror(errno));
ESP_INT_EVENT_TRACKER_CAPTURE(error_handle, ESP_TLS_ERR_TYPE_SYSTEM, errno);
goto err;
}
else if (res == 0) {
ESP_LOGE(TAG, "[sock=%d] select() timeout", fd);
ret = ESP_ERR_ESP_TLS_CONNECTION_TIMEOUT;
goto err;
} else {
int sockerr;
socklen_t len = (socklen_t)sizeof(int);
if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)(&sockerr), &len) < 0) {
ESP_LOGE(TAG, "[sock=%d] getsockopt() error: %s", fd, strerror(errno));
ret = ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED;
goto err;
}
else if (sockerr) {
ESP_INT_EVENT_TRACKER_CAPTURE(error_handle, ESP_TLS_ERR_TYPE_SYSTEM, sockerr);
ESP_LOGE(TAG, "[sock=%d] delayed connect error: %s", fd, strerror(sockerr));
goto err;
}
}
} else {
ESP_LOGE(TAG, "[sock=%d] connect() error: %s", fd, strerror(errno));
goto err;
}
}
if (cfg && cfg->non_block == false) {
// reset back to blocking mode (unless non_block configured)
ret = esp_tls_set_socket_non_blocking(fd, false);
if (ret != ESP_OK) {
goto err;
}
}
*sockfd = fd;
return ESP_OK;
err:
close(fd);
return ret;
}
static int esp_tls_low_level_conn(const char *hostname, int hostlen, int port, const esp_tls_cfg_t *cfg, esp_tls_t *tls)
{
esp_err_t esp_ret;
/* These states are used to keep a tab on connection progress in case of non-blocking connect,
and in case of blocking connect these cases will get executed one after the other */
switch (tls->conn_state) {
case ESP_TLS_INIT:
tls->sockfd = -1;
if (cfg != NULL && cfg->is_plain_tcp == false) {
_esp_tls_net_init(tls);
tls->is_tls = true;
}
if ((esp_ret = tcp_connect(hostname, hostlen, port, cfg, tls->error_handle, &tls->sockfd)) != ESP_OK) {
ESP_INT_EVENT_TRACKER_CAPTURE(tls->error_handle, ESP_TLS_ERR_TYPE_ESP, esp_ret);
return -1;
}
if (tls->is_tls == false) {
tls->read = tcp_read;
tls->write = tcp_write;
ESP_LOGD(TAG, "non-tls connection established");
return 1;
}
if (cfg && cfg->non_block) {
FD_ZERO(&tls->rset);
FD_SET(tls->sockfd, &tls->rset);
tls->wset = tls->rset;
}
tls->conn_state = ESP_TLS_CONNECTING;
/* falls through */
case ESP_TLS_CONNECTING:
if (cfg && cfg->non_block) {
ESP_LOGD(TAG, "connecting...");
struct timeval tv;
ms_to_timeval(cfg->timeout_ms, &tv);
/* In case of non-blocking I/O, we use the select() API to check whether
connection has been established or not*/
if (select(tls->sockfd + 1, &tls->rset, &tls->wset, NULL,
cfg->timeout_ms>0 ? &tv : NULL) == 0) {
ESP_LOGD(TAG, "select() timed out");
return 0;
}
if (FD_ISSET(tls->sockfd, &tls->rset) || FD_ISSET(tls->sockfd, &tls->wset)) {
int error;
socklen_t len = sizeof(error);
/* pending error check */
if (getsockopt(tls->sockfd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
ESP_LOGD(TAG, "Non blocking connect failed");
ESP_INT_EVENT_TRACKER_CAPTURE(tls->error_handle, ESP_TLS_ERR_TYPE_SYSTEM, errno);
ESP_INT_EVENT_TRACKER_CAPTURE(tls->error_handle, ESP_TLS_ERR_TYPE_ESP, ESP_ERR_ESP_TLS_SOCKET_SETOPT_FAILED);
tls->conn_state = ESP_TLS_FAIL;
return -1;
}
}
}
/* By now, the connection has been established */
esp_ret = create_ssl_handle(hostname, hostlen, cfg, tls);
if (esp_ret != ESP_OK) {
ESP_LOGE(TAG, "create_ssl_handle failed");
ESP_INT_EVENT_TRACKER_CAPTURE(tls->error_handle, ESP_TLS_ERR_TYPE_ESP, esp_ret);
tls->conn_state = ESP_TLS_FAIL;
return -1;
}
tls->read = _esp_tls_read;
tls->write = _esp_tls_write;
tls->conn_state = ESP_TLS_HANDSHAKE;
/* falls through */
case ESP_TLS_HANDSHAKE:
ESP_LOGD(TAG, "handshake in progress...");
return esp_tls_handshake(tls, cfg);
break;
case ESP_TLS_FAIL:
ESP_LOGE(TAG, "failed to open a new connection");;
break;
default:
ESP_LOGE(TAG, "invalid esp-tls state");
break;
}
return -1;
}
/**
* @brief Create a new plain TCP connection
*/
esp_err_t esp_tls_plain_tcp_connect(const char *host, int hostlen, int port, const esp_tls_cfg_t *cfg, esp_tls_error_handle_t error_handle, int *sockfd)
{
if (sockfd == NULL || error_handle == NULL) {
return ESP_ERR_INVALID_ARG;
}
return tcp_connect(host, hostlen, port, cfg, error_handle, sockfd);
}
int esp_tls_conn_new_sync(const char *hostname, int hostlen, int port, const esp_tls_cfg_t *cfg, esp_tls_t *tls)
{
if (!cfg || !tls || !hostname || hostlen < 0) {
return -1;
}
uint64_t start_time_us;
start_time_us = esp_tls_get_platform_time();
while (1) {
int ret = esp_tls_low_level_conn(hostname, hostlen, port, cfg, tls);
if (ret == 1) {
return ret;
} else if (ret == -1) {
ESP_LOGE(TAG, "Failed to open new connection");
return -1;
} else if (ret == 0 && cfg->timeout_ms >= 0) {
uint64_t elapsed_time_us = esp_tls_get_platform_time() - start_time_us;
if ((elapsed_time_us / 1000) >= cfg->timeout_ms) {
ESP_LOGW(TAG, "Failed to open new connection in specified timeout");
ESP_INT_EVENT_TRACKER_CAPTURE(tls->error_handle, ESP_TLS_ERR_TYPE_ESP, ESP_ERR_ESP_TLS_CONNECTION_TIMEOUT);
return 0;
}
}
}
return 0;
}
/*
* @brief Create a new TLS/SSL non-blocking connection
*/
int esp_tls_conn_new_async(const char *hostname, int hostlen, int port, const esp_tls_cfg_t *cfg, esp_tls_t *tls)
{
if (!cfg || !tls || !hostname || hostlen < 0) {
return -1;
}
return esp_tls_low_level_conn(hostname, hostlen, port, cfg, tls);
}
static int get_port(const char *url, struct http_parser_url *u)
{
if (u->field_data[UF_PORT].len) {
return strtol(&url[u->field_data[UF_PORT].off], NULL, 10);
} else {
if (strncasecmp(&url[u->field_data[UF_SCHEMA].off], "http", u->field_data[UF_SCHEMA].len) == 0) {
return 80;
} else if (strncasecmp(&url[u->field_data[UF_SCHEMA].off], "https", u->field_data[UF_SCHEMA].len) == 0) {
return 443;
}
}
return 0;
}
esp_tls_t *esp_tls_conn_http_new(const char *url, const esp_tls_cfg_t *cfg)
{
if (!url || !cfg) {
return NULL;
}
/* Parse URI */
struct http_parser_url u;
http_parser_url_init(&u);
http_parser_parse_url(url, strlen(url), 0, &u);
esp_tls_t *tls = esp_tls_init();
if (!tls) {
return NULL;
}
/* Connect to host */
if (esp_tls_conn_new_sync(&url[u.field_data[UF_HOST].off], u.field_data[UF_HOST].len,
get_port(url, &u), cfg, tls) == 1) {
return tls;
}
esp_tls_conn_destroy(tls);
return NULL;
}
/**
* @brief Create a new TLS/SSL connection with a given "HTTP" url
*/
int esp_tls_conn_http_new_sync(const char *url, const esp_tls_cfg_t *cfg, esp_tls_t *tls)
{
if (!url || !cfg || !tls) {
return -1;
}
/* Parse URI */
struct http_parser_url u;
http_parser_url_init(&u);
http_parser_parse_url(url, strlen(url), 0, &u);
/* Connect to host */
return esp_tls_conn_new_sync(&url[u.field_data[UF_HOST].off], u.field_data[UF_HOST].len,
get_port(url, &u), cfg, tls);
}
/**
* @brief Create a new non-blocking TLS/SSL connection with a given "HTTP" url
*/
int esp_tls_conn_http_new_async(const char *url, const esp_tls_cfg_t *cfg, esp_tls_t *tls)
{
/* Parse URI */
struct http_parser_url u;
http_parser_url_init(&u);
http_parser_parse_url(url, strlen(url), 0, &u);
/* Connect to host */
return esp_tls_conn_new_async(&url[u.field_data[UF_HOST].off], u.field_data[UF_HOST].len,
get_port(url, &u), cfg, tls);
}
#ifdef CONFIG_ESP_TLS_USING_MBEDTLS
mbedtls_x509_crt *esp_tls_get_global_ca_store(void)
{
return _esp_tls_get_global_ca_store();
}
const int *esp_tls_get_ciphersuites_list(void)
{
return _esp_tls_get_ciphersuites_list();
}
#endif /* CONFIG_ESP_TLS_USING_MBEDTLS */
#ifdef CONFIG_ESP_TLS_CLIENT_SESSION_TICKETS
esp_tls_client_session_t *esp_tls_get_client_session(esp_tls_t *tls)
{
return _esp_tls_get_client_session(tls);
}
void esp_tls_free_client_session(esp_tls_client_session_t *client_session)
{
_esp_tls_free_client_session(client_session);
}
#endif /* CONFIG_ESP_TLS_CLIENT_SESSION_TICKETS */
esp_err_t esp_tls_cfg_server_session_tickets_init(esp_tls_cfg_server_t *cfg)
{
#if defined(CONFIG_ESP_TLS_SERVER_SESSION_TICKETS)
if (!cfg || cfg->ticket_ctx) {
return ESP_ERR_INVALID_ARG;
}
cfg->ticket_ctx = calloc(1, sizeof(esp_tls_server_session_ticket_ctx_t));
if (!cfg->ticket_ctx) {
return ESP_ERR_NO_MEM;
}
esp_err_t ret = _esp_tls_server_session_ticket_ctx_init(cfg->ticket_ctx);
if (ret != ESP_OK) {
free(cfg->ticket_ctx);
}
return ret;
#else
return ESP_ERR_NOT_SUPPORTED;
#endif
}
void esp_tls_cfg_server_session_tickets_free(esp_tls_cfg_server_t *cfg)
{
#if defined(CONFIG_ESP_TLS_SERVER_SESSION_TICKETS)
if (cfg && cfg->ticket_ctx) {
_esp_tls_server_session_ticket_ctx_free(cfg->ticket_ctx);
}
#endif
}
/**
* @brief Create a server side TLS/SSL connection
*/
int esp_tls_server_session_create(esp_tls_cfg_server_t *cfg, int sockfd, esp_tls_t *tls)
{
return _esp_tls_server_session_create(cfg, sockfd, tls);
}
/**
* @brief Close the server side TLS/SSL connection and free any allocated resources.
*/
void esp_tls_server_session_delete(esp_tls_t *tls)
{
return _esp_tls_server_session_delete(tls);
}
ssize_t esp_tls_get_bytes_avail(esp_tls_t *tls)
{
return _esp_tls_get_bytes_avail(tls);
}
void *esp_tls_get_ssl_context(esp_tls_t *tls)
{
return _esp_tls_get_ssl_context(tls);
}
esp_err_t esp_tls_get_conn_sockfd(esp_tls_t *tls, int *sockfd)
{
if (!tls || !sockfd) {
ESP_LOGE(TAG, "Invalid arguments passed");
return ESP_ERR_INVALID_ARG;
}
*sockfd = tls->sockfd;
return ESP_OK;
}
esp_err_t esp_tls_set_conn_sockfd(esp_tls_t *tls, int sockfd)
{
if (!tls || sockfd < 0) {
ESP_LOGE(TAG, "Invalid arguments passed");
return ESP_ERR_INVALID_ARG;
}
tls->sockfd = sockfd;
return ESP_OK;
}
esp_err_t esp_tls_get_conn_state(esp_tls_t *tls, esp_tls_conn_state_t *conn_state)
{
if (!tls || !conn_state) {
ESP_LOGE(TAG, "Invalid arguments passed");
return ESP_ERR_INVALID_ARG;
}
*conn_state = tls->conn_state;
return ESP_OK;
}
esp_err_t esp_tls_set_conn_state(esp_tls_t *tls, esp_tls_conn_state_t conn_state)
{
if (!tls || conn_state < ESP_TLS_INIT || conn_state > ESP_TLS_DONE) {
ESP_LOGE(TAG, "Invalid arguments passed");
return ESP_ERR_INVALID_ARG;
}
tls->conn_state = conn_state;
return ESP_OK;
}
esp_err_t esp_tls_get_and_clear_last_error(esp_tls_error_handle_t h, int *esp_tls_code, int *esp_tls_flags)
{
if (!h) {
return ESP_ERR_INVALID_STATE;
}
esp_err_t last_err = h->last_error;
if (esp_tls_code) {
*esp_tls_code = h->esp_tls_error_code;
}
if (esp_tls_flags) {
*esp_tls_flags = h->esp_tls_flags;
}
memset(h, 0, sizeof(esp_tls_last_error_t));
return last_err;
}
esp_err_t esp_tls_get_error_handle(esp_tls_t *tls, esp_tls_error_handle_t *error_handle)
{
if (!tls || !error_handle) {
return ESP_ERR_INVALID_ARG;
}
*error_handle = tls->error_handle;
return ESP_OK;
}
esp_err_t esp_tls_init_global_ca_store(void)
{
return _esp_tls_init_global_ca_store();
}
esp_err_t esp_tls_set_global_ca_store(const unsigned char *cacert_pem_buf, const unsigned int cacert_pem_bytes)
{
return _esp_tls_set_global_ca_store(cacert_pem_buf, cacert_pem_bytes);
}
void esp_tls_free_global_ca_store(void)
{
return _esp_tls_free_global_ca_store();
}
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