31b2702387
esp_netif_init() returns standard esp_err_t error code (unlike tcpip_adapter init), so shall be checked for the return value Also to make the initialization code more consistent.
222 lines
6.2 KiB
C
222 lines
6.2 KiB
C
/* OpenSSL server Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include "openssl_server_example.h"
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#include <string.h>
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#include "openssl/ssl.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_log.h"
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#include "esp_wifi.h"
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#include "esp_event.h"
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#include "esp_netif.h"
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#include "nvs_flash.h"
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#include "protocol_examples_common.h"
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#include "lwip/sockets.h"
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#include "lwip/netdb.h"
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const static char *TAG = "Openssl_example";
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#define OPENSSL_EXAMPLE_SERVER_ACK "HTTP/1.1 200 OK\r\n" \
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"Content-Type: text/html\r\n" \
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"Content-Length: 106\r\n\r\n" \
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"<html>\r\n" \
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"<head>\r\n" \
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"<title>OpenSSL example</title></head><body>\r\n" \
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"OpenSSL server example!\r\n" \
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"</body>\r\n" \
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"</html>\r\n" \
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"\r\n"
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static void openssl_example_task(void *p)
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{
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int ret;
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SSL_CTX *ctx;
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SSL *ssl;
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int sockfd, new_sockfd;
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socklen_t addr_len;
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struct sockaddr_in sock_addr;
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char recv_buf[OPENSSL_EXAMPLE_RECV_BUF_LEN];
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const char send_data[] = OPENSSL_EXAMPLE_SERVER_ACK;
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const int send_bytes = sizeof(send_data);
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extern const unsigned char cacert_pem_start[] asm("_binary_cacert_pem_start");
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extern const unsigned char cacert_pem_end[] asm("_binary_cacert_pem_end");
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const unsigned int cacert_pem_bytes = cacert_pem_end - cacert_pem_start;
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extern const unsigned char prvtkey_pem_start[] asm("_binary_prvtkey_pem_start");
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extern const unsigned char prvtkey_pem_end[] asm("_binary_prvtkey_pem_end");
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const unsigned int prvtkey_pem_bytes = prvtkey_pem_end - prvtkey_pem_start;
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ESP_LOGI(TAG, "SSL server context create ......");
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/* For security reasons, it is best if you can use
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TLSv1_2_server_method() here instead of TLS_server_method().
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However some old browsers may not support TLS v1.2.
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*/
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ctx = SSL_CTX_new(TLS_server_method());
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if (!ctx) {
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ESP_LOGI(TAG, "failed");
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goto failed1;
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}
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ESP_LOGI(TAG, "OK");
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ESP_LOGI(TAG, "SSL server context set own certification......");
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ret = SSL_CTX_use_certificate_ASN1(ctx, cacert_pem_bytes, cacert_pem_start);
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if (!ret) {
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ESP_LOGI(TAG, "failed");
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goto failed2;
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}
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ESP_LOGI(TAG, "OK");
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ESP_LOGI(TAG, "SSL server context set private key......");
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ret = SSL_CTX_use_PrivateKey_ASN1(0, ctx, prvtkey_pem_start, prvtkey_pem_bytes);
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if (!ret) {
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ESP_LOGI(TAG, "failed");
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goto failed2;
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}
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ESP_LOGI(TAG, "OK");
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ESP_LOGI(TAG, "SSL server create socket ......");
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sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if (sockfd < 0) {
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ESP_LOGI(TAG, "failed");
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goto failed2;
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}
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ESP_LOGI(TAG, "OK");
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ESP_LOGI(TAG, "SSL server socket bind ......");
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memset(&sock_addr, 0, sizeof(sock_addr));
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sock_addr.sin_family = AF_INET;
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sock_addr.sin_addr.s_addr = 0;
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sock_addr.sin_port = htons(OPENSSL_EXAMPLE_LOCAL_TCP_PORT);
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ret = bind(sockfd, (struct sockaddr*)&sock_addr, sizeof(sock_addr));
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if (ret) {
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ESP_LOGI(TAG, "failed");
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goto failed3;
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}
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ESP_LOGI(TAG, "OK");
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ESP_LOGI(TAG, "SSL server socket listen ......");
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ret = listen(sockfd, 32);
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if (ret) {
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ESP_LOGI(TAG, "failed");
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goto failed3;
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}
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ESP_LOGI(TAG, "OK");
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reconnect:
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ESP_LOGI(TAG, "SSL server create ......");
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ssl = SSL_new(ctx);
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if (!ssl) {
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ESP_LOGI(TAG, "failed");
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goto failed3;
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}
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ESP_LOGI(TAG, "OK");
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ESP_LOGI(TAG, "SSL server socket accept client ......");
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new_sockfd = accept(sockfd, (struct sockaddr *)&sock_addr, &addr_len);
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if (new_sockfd < 0) {
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ESP_LOGI(TAG, "failed" );
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goto failed4;
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}
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ESP_LOGI(TAG, "OK");
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SSL_set_fd(ssl, new_sockfd);
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ESP_LOGI(TAG, "SSL server accept client ......");
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ret = SSL_accept(ssl);
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if (!ret) {
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ESP_LOGI(TAG, "failed");
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goto failed5;
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}
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ESP_LOGI(TAG, "OK");
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ESP_LOGI(TAG, "SSL server read message ......");
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do {
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memset(recv_buf, 0, OPENSSL_EXAMPLE_RECV_BUF_LEN);
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ret = SSL_read(ssl, recv_buf, OPENSSL_EXAMPLE_RECV_BUF_LEN - 1);
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if (ret <= 0) {
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break;
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}
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ESP_LOGI(TAG, "SSL read: %s", recv_buf);
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if (strstr(recv_buf, "GET ") &&
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strstr(recv_buf, " HTTP/1.1")) {
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ESP_LOGI(TAG, "SSL get matched message");
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ESP_LOGI(TAG, "SSL write message");
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ret = SSL_write(ssl, send_data, send_bytes);
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if (ret > 0) {
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ESP_LOGI(TAG, "OK");
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} else {
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ESP_LOGI(TAG, "error");
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}
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break;
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}
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} while (1);
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SSL_shutdown(ssl);
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failed5:
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close(new_sockfd);
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new_sockfd = -1;
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failed4:
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SSL_free(ssl);
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ssl = NULL;
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goto reconnect;
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failed3:
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close(sockfd);
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sockfd = -1;
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failed2:
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SSL_CTX_free(ctx);
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ctx = NULL;
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failed1:
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vTaskDelete(NULL);
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return ;
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}
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static void openssl_server_init(void)
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{
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int ret;
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xTaskHandle openssl_handle;
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ret = xTaskCreate(openssl_example_task,
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OPENSSL_EXAMPLE_TASK_NAME,
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OPENSSL_EXAMPLE_TASK_STACK_WORDS,
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NULL,
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OPENSSL_EXAMPLE_TASK_PRIORITY,
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&openssl_handle);
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if (ret != pdPASS) {
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ESP_LOGI(TAG, "create task %s failed", OPENSSL_EXAMPLE_TASK_NAME);
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}
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}
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void app_main(void)
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{
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ESP_ERROR_CHECK(nvs_flash_init());
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ESP_ERROR_CHECK(esp_netif_init());
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
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* Read "Establishing Wi-Fi or Ethernet Connection" section in
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* examples/protocols/README.md for more information about this function.
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*/
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ESP_ERROR_CHECK(example_connect());
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openssl_server_init();
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}
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