335 lines
7.6 KiB
C++
335 lines
7.6 KiB
C++
/*
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WiFiClientSecure.cpp - Client Secure class for ESP32
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Copyright (c) 2016 Hristo Gochkov All right reserved.
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Additions Copyright (C) 2017 Evandro Luis Copercini.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "WiFiClientSecure.h"
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#include <lwip/sockets.h>
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#include <lwip/netdb.h>
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#include <errno.h>
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#undef connect
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#undef write
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#undef read
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WiFiClientSecure::WiFiClientSecure()
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{
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_connected = false;
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sslclient = new sslclient_context;
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ssl_init(sslclient);
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sslclient->socket = -1;
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sslclient->handshake_timeout = 120000;
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_CA_cert = NULL;
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_cert = NULL;
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_private_key = NULL;
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_pskIdent = NULL;
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_psKey = NULL;
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next = NULL;
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}
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WiFiClientSecure::WiFiClientSecure(int sock)
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{
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_connected = false;
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_timeout = 0;
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sslclient = new sslclient_context;
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ssl_init(sslclient);
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sslclient->socket = sock;
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sslclient->handshake_timeout = 120000;
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if (sock >= 0) {
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_connected = true;
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}
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_CA_cert = NULL;
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_cert = NULL;
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_private_key = NULL;
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_pskIdent = NULL;
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_psKey = NULL;
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next = NULL;
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}
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WiFiClientSecure::~WiFiClientSecure()
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{
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stop();
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delete sslclient;
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}
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WiFiClientSecure &WiFiClientSecure::operator=(const WiFiClientSecure &other)
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{
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stop();
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sslclient->socket = other.sslclient->socket;
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_connected = other._connected;
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return *this;
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}
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void WiFiClientSecure::stop()
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{
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if (sslclient->socket >= 0) {
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close(sslclient->socket);
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sslclient->socket = -1;
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_connected = false;
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_peek = -1;
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}
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stop_ssl_socket(sslclient, _CA_cert, _cert, _private_key);
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}
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int WiFiClientSecure::connect(IPAddress ip, uint16_t port)
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{
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if (_pskIdent && _psKey)
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return connect(ip, port, _pskIdent, _psKey);
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return connect(ip, port, _CA_cert, _cert, _private_key);
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}
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int WiFiClientSecure::connect(IPAddress ip, uint16_t port, int32_t timeout){
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_timeout = timeout;
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return connect(ip, port);
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}
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int WiFiClientSecure::connect(const char *host, uint16_t port)
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{
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if (_pskIdent && _psKey)
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return connect(host, port, _pskIdent, _psKey);
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return connect(host, port, _CA_cert, _cert, _private_key);
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}
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int WiFiClientSecure::connect(const char *host, uint16_t port, int32_t timeout){
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_timeout = timeout;
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return connect(host, port);
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}
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int WiFiClientSecure::connect(IPAddress ip, uint16_t port, const char *_CA_cert, const char *_cert, const char *_private_key)
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{
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return connect(ip.toString().c_str(), port, _CA_cert, _cert, _private_key);
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}
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int WiFiClientSecure::connect(const char *host, uint16_t port, const char *_CA_cert, const char *_cert, const char *_private_key)
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{
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if(_timeout > 0){
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sslclient->handshake_timeout = _timeout;
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}
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int ret = start_ssl_client(sslclient, host, port, _timeout, _CA_cert, _cert, _private_key, NULL, NULL);
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_lastError = ret;
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if (ret < 0) {
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log_e("start_ssl_client: %d", ret);
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stop();
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return 0;
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}
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_connected = true;
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return 1;
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}
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int WiFiClientSecure::connect(IPAddress ip, uint16_t port, const char *pskIdent, const char *psKey) {
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return connect(ip.toString().c_str(), port,_pskIdent, _psKey);
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}
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int WiFiClientSecure::connect(const char *host, uint16_t port, const char *pskIdent, const char *psKey) {
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log_v("start_ssl_client with PSK");
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if(_timeout > 0){
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sslclient->handshake_timeout = _timeout;
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}
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int ret = start_ssl_client(sslclient, host, port, _timeout, NULL, NULL, NULL, _pskIdent, _psKey);
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_lastError = ret;
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if (ret < 0) {
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log_e("start_ssl_client: %d", ret);
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stop();
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return 0;
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}
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_connected = true;
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return 1;
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}
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int WiFiClientSecure::peek(){
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if(_peek >= 0){
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return _peek;
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}
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_peek = timedRead();
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return _peek;
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}
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size_t WiFiClientSecure::write(uint8_t data)
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{
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return write(&data, 1);
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}
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int WiFiClientSecure::read()
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{
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uint8_t data = -1;
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int res = read(&data, 1);
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if (res < 0) {
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return res;
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}
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return data;
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}
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size_t WiFiClientSecure::write(const uint8_t *buf, size_t size)
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{
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if (!_connected) {
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return 0;
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}
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int res = send_ssl_data(sslclient, buf, size);
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if (res < 0) {
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stop();
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res = 0;
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}
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return res;
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}
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int WiFiClientSecure::read(uint8_t *buf, size_t size)
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{
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int peeked = 0;
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int avail = available();
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if ((!buf && size) || avail <= 0) {
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return -1;
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}
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if(!size){
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return 0;
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}
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if(_peek >= 0){
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buf[0] = _peek;
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_peek = -1;
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size--;
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avail--;
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if(!size || !avail){
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return 1;
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}
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buf++;
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peeked = 1;
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}
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int res = get_ssl_receive(sslclient, buf, size);
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if (res < 0) {
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stop();
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return peeked?peeked:res;
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}
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return res + peeked;
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}
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int WiFiClientSecure::available()
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{
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int peeked = (_peek >= 0);
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if (!_connected) {
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return peeked;
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}
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int res = data_to_read(sslclient);
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if (res < 0) {
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stop();
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return peeked?peeked:res;
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}
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return res+peeked;
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}
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uint8_t WiFiClientSecure::connected()
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{
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uint8_t dummy = 0;
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read(&dummy, 0);
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return _connected;
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}
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void WiFiClientSecure::setCACert (const char *rootCA)
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{
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_CA_cert = rootCA;
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}
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void WiFiClientSecure::setCertificate (const char *client_ca)
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{
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_cert = client_ca;
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}
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void WiFiClientSecure::setPrivateKey (const char *private_key)
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{
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_private_key = private_key;
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}
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void WiFiClientSecure::setPreSharedKey(const char *pskIdent, const char *psKey) {
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_pskIdent = pskIdent;
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_psKey = psKey;
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}
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bool WiFiClientSecure::verify(const char* fp, const char* domain_name)
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{
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if (!sslclient)
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return false;
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return verify_ssl_fingerprint(sslclient, fp, domain_name);
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}
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char *WiFiClientSecure::_streamLoad(Stream& stream, size_t size) {
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char *dest = (char*)malloc(size+1);
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if (!dest) {
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return nullptr;
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}
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if (size != stream.readBytes(dest, size)) {
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free(dest);
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dest = nullptr;
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return nullptr;
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}
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dest[size] = '\0';
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return dest;
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}
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bool WiFiClientSecure::loadCACert(Stream& stream, size_t size) {
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char *dest = _streamLoad(stream, size);
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bool ret = false;
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if (dest) {
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setCACert(dest);
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ret = true;
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}
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return ret;
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}
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bool WiFiClientSecure::loadCertificate(Stream& stream, size_t size) {
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char *dest = _streamLoad(stream, size);
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bool ret = false;
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if (dest) {
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setCertificate(dest);
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ret = true;
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}
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return ret;
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}
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bool WiFiClientSecure::loadPrivateKey(Stream& stream, size_t size) {
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char *dest = _streamLoad(stream, size);
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bool ret = false;
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if (dest) {
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setPrivateKey(dest);
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ret = true;
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}
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return ret;
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}
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int WiFiClientSecure::lastError(char *buf, const size_t size)
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{
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if (!_lastError) {
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return 0;
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}
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char error_buf[100];
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mbedtls_strerror(_lastError, error_buf, 100);
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snprintf(buf, size, "%s", error_buf);
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return _lastError;
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}
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void WiFiClientSecure::setHandshakeTimeout(unsigned long handshake_timeout)
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{
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sslclient->handshake_timeout = handshake_timeout * 1000;
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}
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