kc3-lang/kc3/libtls_server_example.c

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• Hash : a38068d3
  Author : Thomas de Grivel
  Date : 2025-08-26T18:35:57
  

  todo
  

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• libtls_server_example.c

• #include <sys/socket.h>
  #include <netinet/in.h>
  #include <tls.h>
  #include <unistd.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  int main() {
      struct tls_config *config;
      struct tls *ctx;
      int server_fd, client_fd;
      struct sockaddr_in addr;
      char buffer[1024];
      ssize_t len;
      
      // Create socket
      server_fd = socket(AF_INET, SOCK_STREAM, 0);
      if (server_fd < 0) {
          perror("socket");
          exit(1);
      }
      
      // Bind to port 8443
      memset(&addr, 0, sizeof(addr));
      addr.sin_family = AF_INET;
      addr.sin_addr.s_addr = INADDR_ANY;
      addr.sin_port = htons(8443);
      
      if (bind(server_fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
          perror("bind");
          exit(1);
      }
      
      listen(server_fd, 5);
      
      // Initialize TLS
      if (tls_init() != 0) {
          fprintf(stderr, "tls_init failed\n");
          exit(1);
      }
      
      // Create TLS configuration
      config = tls_config_new();
      if (!config) {
          fprintf(stderr, "tls_config_new failed\n");
          exit(1);
      }
      
      // Set server certificate and key
      if (tls_config_set_cert_file(config, "/etc/ssl/server.crt") != 0) {
          fprintf(stderr, "Failed to set cert: %s\n", tls_config_error(config));
          exit(1);
      }
      
      if (tls_config_set_key_file(config, "/etc/ssl/server.key") != 0) {
          fprintf(stderr, "Failed to set key: %s\n", tls_config_error(config));
          exit(1);
      }
      
      // Create TLS server context
      ctx = tls_server();
      if (!ctx) {
          fprintf(stderr, "tls_server failed\n");
          exit(1);
      }
      
      if (tls_configure(ctx, config) != 0) {
          fprintf(stderr, "tls_configure: %s\n", tls_error(ctx));
          exit(1);
      }
      
      printf("TLS server listening on port 8443\n");
      
      // Accept connections
      while ((client_fd = accept(server_fd, NULL, NULL)) >= 0) {
          struct tls *client_ctx;
          
          // Accept TLS handshake on client socket
          if (tls_accept_socket(ctx, &client_ctx, client_fd) != 0) {
              fprintf(stderr, "tls_accept_socket: %s\n", tls_error(ctx));
              close(client_fd);
              continue;
          }
          
          printf("TLS connection established\n");
          
          // Read client data
          len = tls_read(client_ctx, buffer, sizeof(buffer) - 1);
          if (len > 0) {
              buffer[len] = '\0';
              printf("Received: %s", buffer);
              
              // Send response
              const char *response = "HTTP/1.1 200 OK\r\n"
                                   "Content-Length: 13\r\n"
                                   "Content-Type: text/plain\r\n\r\n"
                                   "Hello, TLS!\r\n";
              tls_write(client_ctx, response, strlen(response));
          }
          
          // Close TLS connection
          tls_close(client_ctx);
          tls_free(client_ctx);
          close(client_fd);
      }
      
      tls_free(ctx);
      tls_config_free(config);
      close(server_fd);
      return 0;
  }
  
  /*
   * Compile with:
   * cc -o tlsserver libtls_server_example.c -ltls -lssl -lcrypto
   *
   * Generate test certificates:
   * openssl req -x509 -newkey rsa:4096 -keyout server.key -out server.crt -days 365 -nodes
   */
  

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