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Add axTLS, first draft of WiFiClientSecure (#43)
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264 changes: 264 additions & 0 deletions
264
hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,264 @@ | ||
| /* | ||
| WiFiClientSecure.cpp - Variant of WiFiClient with TLS support | ||
| Copyright (c) 2015 Ivan Grokhotkov. All rights reserved. | ||
| This file is part of the esp8266 core for Arduino environment. | ||
| This library is free software; you can redistribute it and/or | ||
| modify it under the terms of the GNU Lesser General Public | ||
| License as published by the Free Software Foundation; either | ||
| version 2.1 of the License, or (at your option) any later version. | ||
| This library is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public | ||
| License along with this library; if not, write to the Free Software | ||
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
| */ | ||
|
|
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| #define LWIP_INTERNAL | ||
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| extern "C" | ||
| { | ||
| #include "osapi.h" | ||
| #include "ets_sys.h" | ||
| } | ||
| #include <errno.h> | ||
| #include "debug.h" | ||
| #include "ESP8266WiFi.h" | ||
| #include "WiFiClientSecure.h" | ||
| #include "WiFiClient.h" | ||
| #include "lwip/opt.h" | ||
| #include "lwip/ip.h" | ||
| #include "lwip/tcp.h" | ||
| #include "lwip/inet.h" | ||
| #include "lwip/netif.h" | ||
| #include "cbuf.h" | ||
| #include "include/ClientContext.h" | ||
| #include "c_types.h" | ||
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| class SSLContext { | ||
| public: | ||
| SSLContext() { | ||
| if (_ssl_ctx_refcnt == 0) { | ||
| _ssl_ctx = ssl_ctx_new(SSL_SERVER_VERIFY_LATER | SSL_DISPLAY_STATES, 0); | ||
| } | ||
| ++_ssl_ctx_refcnt; | ||
|
|
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| } | ||
|
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| ~SSLContext() { | ||
| if (_ssl) { | ||
| ssl_free(_ssl); | ||
| _ssl = nullptr; | ||
| } | ||
|
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| --_ssl_ctx_refcnt; | ||
| if (_ssl_ctx_refcnt == 0) { | ||
| ssl_ctx_free(_ssl_ctx); | ||
| } | ||
| } | ||
|
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| void ref() { | ||
| ++_refcnt; | ||
| } | ||
|
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| void unref() { | ||
| if (--_refcnt == 0) { | ||
| delete this; | ||
| } | ||
| } | ||
|
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| void connect(ClientContext* ctx) { | ||
| _ssl = ssl_client_new(_ssl_ctx, reinterpret_cast<int>(ctx), nullptr, 0); | ||
| } | ||
|
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| operator SSL*() { | ||
| return _ssl; | ||
| } | ||
|
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| protected: | ||
| static SSL_CTX* _ssl_ctx; | ||
| static int _ssl_ctx_refcnt; | ||
| SSL* _ssl = nullptr; | ||
| int _refcnt = 0; | ||
| }; | ||
|
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| SSL_CTX* SSLContext::_ssl_ctx = nullptr; | ||
| int SSLContext::_ssl_ctx_refcnt = 0; | ||
|
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| WiFiClientSecure::WiFiClientSecure() | ||
| { | ||
| } | ||
|
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| WiFiClientSecure::~WiFiClientSecure() | ||
| { | ||
| if (_ssl) { | ||
| _ssl->unref(); | ||
| } | ||
| } | ||
|
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| WiFiClientSecure::WiFiClientSecure(const WiFiClientSecure& other) | ||
| : WiFiClient(static_cast<const WiFiClient&>(other)) | ||
| { | ||
| _ssl = other._ssl; | ||
| if (_ssl) { | ||
| _ssl->ref(); | ||
| } | ||
| } | ||
|
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| WiFiClientSecure& WiFiClientSecure::operator=(const WiFiClientSecure& rhs) { | ||
| (WiFiClient&) *this = rhs; | ||
| _ssl = rhs._ssl; | ||
| if (_ssl) { | ||
| _ssl->ref(); | ||
| } | ||
| return *this; | ||
| } | ||
|
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| int WiFiClientSecure::connect(IPAddress ip, uint16_t port) { | ||
| if (!WiFiClient::connect(ip, port)) | ||
| return 0; | ||
|
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| return _connectSSL(); | ||
| } | ||
|
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| int WiFiClientSecure::connect(const char* name, uint16_t port) { | ||
| if (!WiFiClient::connect(name, port)) | ||
| return 0; | ||
| return 1; | ||
| } | ||
|
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| int WiFiClientSecure::_connectSSL() { | ||
| if (_ssl) { | ||
| _ssl->unref(); | ||
| _ssl = nullptr; | ||
| } | ||
|
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| _ssl = new SSLContext; | ||
| _ssl->ref(); | ||
| _ssl->connect(_client); | ||
|
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| auto status = ssl_handshake_status(*_ssl); | ||
| if (status != SSL_OK) { | ||
| _ssl->unref(); | ||
| _ssl = nullptr; | ||
| return 0; | ||
| } | ||
|
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| return 1; | ||
| } | ||
|
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| size_t WiFiClientSecure::write(const uint8_t *buf, size_t size) { | ||
| int rc = ssl_write(*_ssl, buf, size); | ||
| if (rc >= 0) | ||
| return rc; | ||
|
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| return 0; | ||
| } | ||
|
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| int WiFiClientSecure::read(uint8_t *buf, size_t size) { | ||
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| uint8_t* data; | ||
| int rc = ssl_read(*_ssl, &data); | ||
| if (rc <= 0) | ||
| return 0; | ||
|
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| memcpy(buf, data, rc); | ||
| return rc; | ||
| } | ||
|
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| void WiFiClientSecure::stop() { | ||
| if (_ssl) { | ||
| _ssl->unref(); | ||
| _ssl = nullptr; | ||
| } | ||
| return WiFiClient::stop(); | ||
| } | ||
|
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| extern "C" int ax_port_read(int fd, uint8_t* buffer, size_t count) { | ||
| ClientContext* _client = reinterpret_cast<ClientContext*>(fd); | ||
| if (_client->state() != ESTABLISHED && !_client->getSize()) { | ||
| return -1; | ||
| errno = EIO; | ||
| } | ||
| size_t cb = _client->read((char*) buffer, count); | ||
| if (cb != count) { | ||
| errno = EAGAIN; | ||
| } | ||
| if (cb == 0) { | ||
| yield(); | ||
| return -1; | ||
| } | ||
| return cb; | ||
| } | ||
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| extern "C" int ax_port_write(int fd, uint8_t* buffer, size_t count) { | ||
| ClientContext* _client = reinterpret_cast<ClientContext*>(fd); | ||
| if (_client->state() != ESTABLISHED) { | ||
| errno = EIO; | ||
| return -1; | ||
| } | ||
| size_t cb = _client->write((const char*) buffer, count); | ||
| if (cb != count) { | ||
| errno = EAGAIN; | ||
| } | ||
| return cb; | ||
| } | ||
|
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| extern "C" int ax_get_file(const char *filename, uint8_t **buf) { | ||
| *buf = 0; | ||
| return 0; | ||
| } | ||
|
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| #ifdef DEBUG_TLS_MEM | ||
| #define DEBUG_TLS_MEM_PRINT(...) DEBUGV(__VA_ARGS__) | ||
| #else | ||
| #define DEBUG_TLS_MEM_PRINT(...) | ||
| #endif | ||
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| extern "C" void* ax_port_malloc(size_t size, const char* file, int line) { | ||
| void* result = malloc(size); | ||
|
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| if (result == nullptr) { | ||
| DEBUG_TLS_MEM_PRINT("%s:%d malloc %d failed, left %d\r\n", file, line, size, ESP.getFreeHeap()); | ||
|
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| while(true){} | ||
| } | ||
| if (size >= 1024) | ||
| DEBUG_TLS_MEM_PRINT("%s:%d malloc %d, left %d\r\n", file, line, size, ESP.getFreeHeap()); | ||
| return result; | ||
| } | ||
|
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| extern "C" void* ax_port_calloc(size_t size, size_t count, const char* file, int line) { | ||
| void* result = ax_port_malloc(size * count, file, line); | ||
| memset(result, 0, size * count); | ||
| return result; | ||
| } | ||
|
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| extern "C" void* ax_port_realloc(void* ptr, size_t size, const char* file, int line) { | ||
| void* result = realloc(ptr, size); | ||
| if (result == nullptr) { | ||
| DEBUG_TLS_MEM_PRINT("%s:%d realloc %d failed, left %d\r\n", file, line, size, ESP.getFreeHeap()); | ||
| while(true){} | ||
| } | ||
| if (size >= 1024) | ||
| DEBUG_TLS_MEM_PRINT("%s:%d realloc %d, left %d\r\n", file, line, size, ESP.getFreeHeap()); | ||
| return result; | ||
| } | ||
|
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| extern "C" void ax_port_free(void* ptr) { | ||
| free(ptr); | ||
| uint32_t *p = (uint32_t*) ptr; | ||
| size_t size = p[-3]; | ||
| if (size >= 1024) | ||
| DEBUG_TLS_MEM_PRINT("free %d, left %d\r\n", p[-3], ESP.getFreeHeap()); | ||
| } |
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