Atmosphere/libraries/libstratosphere/source/spl/spl_api.os.generic.cpp
2022-03-21 17:21:44 -07:00

135 lines
4.7 KiB
C++

/*
* Copyright (c) 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 <stratosphere.hpp>
namespace ams::spl {
namespace {
bool InitializeImpl() {
/* Initialize implementation api. */
impl::Initialize();
return true;
}
void EnsureInitialized() {
AMS_FUNCTION_LOCAL_STATIC(bool, s_initialized, InitializeImpl());
AMS_ABORT_UNLESS(s_initialized);
}
Result WaitAvailableKeySlotAndExecute(auto f) {
os::SystemEvent *event = nullptr;
while (true) {
R_TRY_CATCH(static_cast<::ams::Result>(f())) {
R_CATCH(spl::ResultNoAvailableKeySlot) {
if (event == nullptr) {
event = impl::GetAesKeySlotAvailableEvent();
}
event->Wait();
continue;
}
} R_END_TRY_CATCH;
R_SUCCEED();
}
}
}
Result AllocateAesKeySlot(s32 *out_slot) {
EnsureInitialized();
R_RETURN(WaitAvailableKeySlotAndExecute([&]() -> Result {
R_RETURN(impl::AllocateAesKeySlot(out_slot));
}));
}
Result DeallocateAesKeySlot(s32 slot) {
EnsureInitialized();
R_RETURN(impl::DeallocateAesKeySlot(slot));
}
Result GenerateAesKek(AccessKey *out_access_key, const void *key_source, size_t key_source_size, s32 generation, u32 option) {
EnsureInitialized();
/* Check key size (assumed valid). */
AMS_ASSERT(key_source_size == sizeof(KeySource));
AMS_UNUSED(key_source_size);
/* AccessKey *out_access_key, const KeySource &key_source, u32 generation, u32 option */
R_RETURN(impl::GenerateAesKek(out_access_key, *static_cast<const KeySource *>(key_source), generation, option));
}
Result LoadAesKey(s32 slot, const AccessKey &access_key, const void *key_source, size_t key_source_size) {
EnsureInitialized();
AMS_ASSERT(key_source_size == sizeof(KeySource));
AMS_UNUSED(key_source_size);
R_RETURN(impl::LoadAesKey(slot, access_key, *static_cast<const KeySource *>(key_source)));
}
Result GenerateAesKey(void *dst, size_t dst_size, const AccessKey &access_key, const void *key_source, size_t key_source_size) {
EnsureInitialized();
AMS_ASSERT(dst_size >= sizeof(AesKey));
AMS_ASSERT(key_source_size == sizeof(KeySource));
AMS_UNUSED(dst_size, key_source_size);
R_RETURN(WaitAvailableKeySlotAndExecute([&]() -> Result {
R_RETURN(impl::GenerateAesKey(static_cast<AesKey *>(dst), access_key, *static_cast<const KeySource *>(key_source)));
}));
}
Result ComputeCtr(void *dst, size_t dst_size, s32 slot, const void *src, size_t src_size, const void *iv, size_t iv_size) {
EnsureInitialized();
AMS_ASSERT(iv_size >= sizeof(IvCtr));
AMS_UNUSED(iv_size);
AMS_ASSERT(dst_size >= src_size);
R_RETURN(impl::ComputeCtr(dst, dst_size, slot, src, src_size, *static_cast<const IvCtr *>(iv)));
}
Result DecryptAesKey(void *dst, size_t dst_size, const void *key_source, size_t key_source_size, s32 generation, u32 option) {
EnsureInitialized();
AMS_ASSERT(dst_size >= crypto::AesEncryptor128::KeySize);
AMS_ASSERT(key_source_size == sizeof(KeySource));
AMS_UNUSED(dst_size, key_source_size);
R_RETURN(WaitAvailableKeySlotAndExecute([&]() -> Result {
R_RETURN(impl::DecryptAesKey(static_cast<AesKey *>(dst), *static_cast<const KeySource *>(key_source), static_cast<u32>(generation), option));
}));
}
Result LoadPreparedAesKey(s32 slot, const AccessKey &access_key) {
EnsureInitialized();
R_RETURN(impl::LoadPreparedAesKey(slot, access_key));
}
Result PrepareCommonEsTitleKey(AccessKey *out, const void *key_source, const size_t key_source_size, int generation) {
EnsureInitialized();
AMS_ASSERT(key_source_size == sizeof(KeySource));
R_RETURN(impl::PrepareCommonEsTitleKey(out, *static_cast<const KeySource *>(key_source), generation));
}
}