protocomm security1: Restart security session if SESSION_STATE_CMD0 is received

With the introduction of cookies to track a session, it is possible that the
clients restart the provisioning on the same session, specifically when a user
cancels a current provisioning attempt. This can result in an error as the state
on the device side and client side will go out of sync.

This has now been changed such that if SESSION_STATE_CMD0 is received on
an existing session, the state is reset and flow allowed to continue.

Author: shahpiyushv

components/protocomm/src/security/security1.c

@@ -175,6 +175,8 @@ static esp_err_t handle_session_command1(session_t *cur_session,
     return ESP_OK;
 }
 
+static esp_err_t sec1_new_session(protocomm_security_handle_t handle, uint32_t session_id);
+
 static esp_err_t handle_session_command0(session_t *cur_session,
                                          uint32_t session_id,
                                          SessionData *req, SessionData *resp,
@@ -186,8 +188,9 @@ static esp_err_t handle_session_command0(session_t *cur_session,
     int mbed_err;
 
     if (cur_session->state != SESSION_STATE_CMD0) {
-        ESP_LOGE(TAG, "Invalid state of session %d (expected %d)", SESSION_STATE_CMD0, cur_session->state);
-        return ESP_ERR_INVALID_STATE;
+        ESP_LOGW(TAG, "Invalid state of session %d (expected %d). Restarting session.",
+                SESSION_STATE_CMD0, cur_session->state);
+        sec1_new_session(cur_session, session_id);
     }
 
     if (in->sc0->client_pubkey.len != PUBLIC_KEY_LEN) {