sdl_webview.cpp

 
#include <string>
#include <sstream>
#include <cstdlib>
#include <winpr/string.h>
#include <freerdp/log.h>
#include <freerdp/utils/aad.h>
 
#include "sdl_webview.hpp"
#include "webview_impl.hpp"
 
#define TAG CLIENT_TAG("SDL.webview")
 
static std::string from_settings(const rdpSettings* settings, FreeRDP_Settings_Keys_String id)
{
  auto val = freerdp_settings_get_string(settings, id);
  if (!val)
  {
    WLog_WARN(TAG, "Settings key %s is NULL", freerdp_settings_get_name_for_key(id));
    return "";
  }
  return val;
}
 
static std::string from_aad_wellknown(rdpContext* context, AAD_WELLKNOWN_VALUES which)
{
  auto val = freerdp_utils_aad_get_wellknown_string(context, which);
 
  if (!val)
  {
    WLog_WARN(TAG, "[wellknown] key %s is NULL", freerdp_utils_aad_wellknwon_value_name(which));
    return "";
  }
  return val;
}
 
static BOOL sdl_webview_get_rdsaad_access_token(freerdp* instance, const char* scope,
                                                const char* req_cnf, char** token)
{
  WINPR_ASSERT(instance);
  WINPR_ASSERT(scope);
  WINPR_ASSERT(req_cnf);
  WINPR_ASSERT(token);
 
  WINPR_UNUSED(instance);
  WINPR_UNUSED(instance->context);
 
  auto client_id = from_settings(instance->context->settings, FreeRDP_GatewayAvdClientID);
  std::string redirect_uri = "ms-appx-web%3a%2f%2fMicrosoft.AAD.BrokerPlugin%2f" + client_id;
 
  *token = nullptr;
 
  auto ep = from_aad_wellknown(instance->context, AAD_WELLKNOWN_authorization_endpoint);
  auto url = ep + "?client_id=" + client_id + "&response_type=code&scope=" + scope +
             "&redirect_uri=" + redirect_uri;
 
  const std::string title = "FreeRDP WebView - AAD access token";
  std::string code;
  auto rc = webview_impl_run(title, url, code);
  if (!rc || code.empty())
    return FALSE;
 
  auto token_request = "grant_type=authorization_code&code=" + code + "&client_id=" + client_id +
                       "&scope=" + scope + "&redirect_uri=" + redirect_uri +
                       "&req_cnf=" + req_cnf;
  return client_common_get_access_token(instance, token_request.c_str(), token);
}
 
static BOOL sdl_webview_get_avd_access_token(freerdp* instance, char** token)
{
  WINPR_ASSERT(token);
  WINPR_ASSERT(instance);
  WINPR_ASSERT(instance->context);
 
  auto client_id = from_settings(instance->context->settings, FreeRDP_GatewayAvdClientID);
  std::string redirect_uri = "ms-appx-web%3a%2f%2fMicrosoft.AAD.BrokerPlugin%2f" + client_id;
  std::string scope = "https%3A%2F%2Fwww.wvd.microsoft.com%2F.default";
 
  *token = nullptr;
 
  auto ep = from_aad_wellknown(instance->context, AAD_WELLKNOWN_authorization_endpoint);
  auto url = ep + "?client_id=" + client_id + "&response_type=code&scope=" + scope +
             "&redirect_uri=" + redirect_uri;
  const std::string title = "FreeRDP WebView - AVD access token";
  std::string code;
  auto rc = webview_impl_run(title, url, code);
  if (!rc || code.empty())
    return FALSE;
 
  auto token_request = "grant_type=authorization_code&code=" + code + "&client_id=" + client_id +
                       "&scope=" + scope + "&redirect_uri=" + redirect_uri;
  return client_common_get_access_token(instance, token_request.c_str(), token);
}
 
BOOL sdl_webview_get_access_token(freerdp* instance, AccessTokenType tokenType, char** token,
                                  size_t count, ...)
{
  WINPR_ASSERT(instance);
  WINPR_ASSERT(token);
  switch (tokenType)
  {
    case ACCESS_TOKEN_TYPE_AAD:
    {
      if (count < 2)
      {
        WLog_ERR(TAG,
                 "ACCESS_TOKEN_TYPE_AAD expected 2 additional arguments, but got %" PRIuz
                 ", aborting",
                 count);
        return FALSE;
      }
      else if (count > 2)
        WLog_WARN(TAG,
                  "ACCESS_TOKEN_TYPE_AAD expected 2 additional arguments, but got %" PRIuz
                  ", ignoring",
                  count);
      va_list ap = {};
      va_start(ap, count);
      const char* scope = va_arg(ap, const char*);
      const char* req_cnf = va_arg(ap, const char*);
      const BOOL rc = sdl_webview_get_rdsaad_access_token(instance, scope, req_cnf, token);
      va_end(ap);
      return rc;
    }
    case ACCESS_TOKEN_TYPE_AVD:
      if (count != 0)
        WLog_WARN(TAG,
                  "ACCESS_TOKEN_TYPE_AVD expected 0 additional arguments, but got %" PRIuz
                  ", ignoring",
                  count);
      return sdl_webview_get_avd_access_token(instance, token);
    default:
      WLog_ERR(TAG, "Unexpected value for AccessTokenType [%" PRIuz "], aborting", tokenType);
      return FALSE;
  }
}