Atmosphere/stratosphere/ro/source/ro_nrr.cpp
2019-06-17 14:46:18 -07:00

78 lines
2.2 KiB
C++

/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <switch.h>
#include <cstdio>
#include <algorithm>
#include <stratosphere.hpp>
#include "ro_nrr.hpp"
#include "ro_registration.hpp"
Result NrrUtils::ValidateNrrSignature(const NrrHeader *header) {
/* TODO: Implement RSA-2048 PSS..... */
/* TODO: Check PSS fixed-key signature. */
if (false) {
return ResultRoNotAuthorized;
}
/* Check TitleID pattern is valid. */
if ((header->title_id & header->title_id_mask) != header->title_id_pattern) {
return ResultRoNotAuthorized;
}
/* TODO: Check PSS signature over hashes. */
if (false) {
return ResultRoNotAuthorized;
}
return ResultSuccess;
}
Result NrrUtils::ValidateNrr(const NrrHeader *header, u64 size, u64 title_id, RoModuleType expected_type, bool enforce_type) {
if (header->magic != MagicNrr0) {
return ResultRoInvalidNrr;
}
if (header->nrr_size != size) {
return ResultRoInvalidSize;
}
bool ease_nro_restriction = Registration::ShouldEaseNroRestriction();
/* Check signature. */
if (!ease_nro_restriction) {
R_TRY(ValidateNrrSignature(header));
}
/* Check title id. */
if (title_id != header->title_id) {
if (!ease_nro_restriction) {
return ResultRoInvalidNrr;
}
}
/* Check type. */
if (GetRuntimeFirmwareVersion() >= FirmwareVersion_700) {
if (!enforce_type || expected_type != static_cast<RoModuleType>(header->nrr_type)) {
if (!ease_nro_restriction) {
return ResultRoInvalidNrrType;
}
}
}
return ResultSuccess;
}