Add support for TLS.

Cert is self-signed and auto-generated on first boot.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/usb/lwip/rest.h

@@ -0,0 +1,80 @@
+/*
+ * This file is part of the Pico Keys SDK distribution (https://github.com/polhenarejos/pico-keys-sdk).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program 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
+ * Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef REST_SERVER_H
+#define REST_SERVER_H
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include "cJSON.h"
+
+#define REST_MAX_REQUEST_SIZE 1024
+#define REST_MAX_METHOD_SIZE 8
+#define REST_MAX_CONTENT_TYPE_SIZE 64
+#define REST_MAX_PATH_SIZE 192
+
+typedef enum {
+    REST_HTTP_GET = 0,
+    REST_HTTP_POST,
+    REST_HTTP_PUT,
+    REST_HTTP_DELETE
+} rest_http_method_t;
+
+typedef struct {
+    rest_http_method_t method;
+    char path[REST_MAX_PATH_SIZE];
+    const char *body;
+    size_t body_len;
+    const char *content_type;
+} rest_request_t;
+
+typedef struct {
+    uint16_t status_code;
+    const char *content_type;
+    char *body; // heap !
+    size_t body_len;
+    cJSON *json;
+} rest_response_t;
+
+typedef int (*rest_route_handler_t)(const rest_request_t *request, rest_response_t *response);
+
+typedef struct {
+    rest_http_method_t method;
+    const char *path;
+    rest_route_handler_t handler;
+} rest_route_t;
+
+
+extern int execute_route_handler(const rest_request_t *request, rest_route_handler_t handler, rest_response_t *response);
+extern int rest_response_set_error(rest_response_t *response, int status_code, const char *message);
+const char *rest_status_text_from_code(uint16_t code);
+const char *rest_method_to_string(rest_http_method_t method);
+bool rest_content_type_is_json(const char *content_type);
+
+const rest_route_t *rest_get_routes(size_t *count);
+
+#ifdef DEBUG_APDU
+extern void debug_dump_payload(const char *tag, const char *buffer, size_t len);
+#define REST_DEBUG_LOG(...) printf(__VA_ARGS__)
+#else
+#define debug_dump_payload(tag, buffer, len) do { (void)(tag); (void)(buffer); (void)(len); } while (0)
+#define REST_DEBUG_LOG(...) do {} while (0)
+#endif
+
+#endif