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Merge pull request #921 from lioncash/view

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core/crypto: Minor changes
This commit is contained in:
bunnei 2018-08-04 21:17:10 -04:00 committed by GitHub
commit cd96c04339
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 35 additions and 35 deletions
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35
src/core/crypto/aes_util.cpp
View file

@ -3,10 +3,22 @@
// Refer to the license.txt file included.
#include <mbedtls/cipher.h>
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/crypto/aes_util.h"
#include "core/crypto/key_manager.h"
namespace Core::Crypto {
namespace {
std::vector<u8> CalculateNintendoTweak(size_t sector_id) {
std::vector<u8> out(0x10);
for (size_t i = 0xF; i <= 0xF; --i) {
out[i] = sector_id & 0xFF;
sector_id >>= 8;
}
return out;
}
} // Anonymous namespace
static_assert(static_cast<size_t>(Mode::CTR) == static_cast<size_t>(MBEDTLS_CIPHER_AES_128_CTR),
"CTR has incorrect value.");
@ -56,27 +68,28 @@ void AESCipher<Key, KeySize>::SetIV(std::vector<u8> iv) {
}
template <typename Key, size_t KeySize>
void AESCipher<Key, KeySize>::Transcode(const u8* src, size_t size, u8* dest, Op op) {
size_t written = 0;
const auto context = op == Op::Encrypt ? &ctx->encryption_context : &ctx->decryption_context;
void AESCipher<Key, KeySize>::Transcode(const u8* src, size_t size, u8* dest, Op op) const {
auto* const context = op == Op::Encrypt ? &ctx->encryption_context : &ctx->decryption_context;
mbedtls_cipher_reset(context);
size_t written = 0;
if (mbedtls_cipher_get_cipher_mode(context) == MBEDTLS_MODE_XTS) {
mbedtls_cipher_update(context, src, size, dest, &written);
if (written != size)
if (written != size) {
LOG_WARNING(Crypto, "Not all data was decrypted requested={:016X}, actual={:016X}.",
size, written);
}
} else {
const auto block_size = mbedtls_cipher_get_block_size(context);
for (size_t offset = 0; offset < size; offset += block_size) {
auto length = std::min<size_t>(block_size, size - offset);
mbedtls_cipher_update(context, src + offset, length, dest + offset, &written);
if (written != length)
if (written != length) {
LOG_WARNING(Crypto, "Not all data was decrypted requested={:016X}, actual={:016X}.",
length, written);
}
}
}
@ -97,16 +110,6 @@ void AESCipher<Key, KeySize>::XTSTranscode(const u8* src, size_t size, u8* dest,
}
}
template <typename Key, size_t KeySize>
std::vector<u8> AESCipher<Key, KeySize>::CalculateNintendoTweak(size_t sector_id) {
std::vector<u8> out(0x10);
for (size_t i = 0xF; i <= 0xF; --i) {
out[i] = sector_id & 0xFF;
sector_id >>= 8;
}
return out;
}
template class AESCipher<Key128>;
template class AESCipher<Key256>;
} // namespace Core::Crypto

12
src/core/crypto/aes_util.h
View file

@ -7,7 +7,7 @@
#include <memory>
#include <type_traits>
#include <vector>
#include "common/assert.h"
#include "common/common_types.h"
#include "core/file_sys/vfs.h"
namespace Core::Crypto {
@ -38,15 +38,19 @@ public:
void SetIV(std::vector<u8> iv);
template <typename Source, typename Dest>
void Transcode(const Source* src, size_t size, Dest* dest, Op op) {
void Transcode(const Source* src, size_t size, Dest* dest, Op op) const {
static_assert(std::is_trivially_copyable_v<Source> && std::is_trivially_copyable_v<Dest>,
"Transcode source and destination types must be trivially copyable.");
Transcode(reinterpret_cast<const u8*>(src), size, reinterpret_cast<u8*>(dest), op);
}
void Transcode(const u8* src, size_t size, u8* dest, Op op);
void Transcode(const u8* src, size_t size, u8* dest, Op op) const;
template <typename Source, typename Dest>
void XTSTranscode(const Source* src, size_t size, Dest* dest, size_t sector_id,
size_t sector_size, Op op) {
static_assert(std::is_trivially_copyable_v<Source> && std::is_trivially_copyable_v<Dest>,
"XTSTranscode source and destination types must be trivially copyable.");
XTSTranscode(reinterpret_cast<const u8*>(src), size, reinterpret_cast<u8*>(dest), sector_id,
sector_size, op);
}
@ -56,7 +60,5 @@ public:
private:
std::unique_ptr<CipherContext> ctx;
static std::vector<u8> CalculateNintendoTweak(size_t sector_id);
};
} // namespace Core::Crypto

1
src/core/crypto/encryption_layer.h
View file

@ -4,6 +4,7 @@
#pragma once
#include "common/common_types.h"
#include "core/file_sys/vfs.h"
namespace Core::Crypto {

15
src/core/crypto/key_manager.cpp
View file

@ -2,19 +2,16 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <fstream>
#include <locale>
#include <sstream>
#include <string_view>
#include <mbedtls/sha256.h>
#include "common/assert.h"
#include "common/common_paths.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#include "core/crypto/key_manager.h"
#include "core/settings.h"
#include "key_manager.h"
namespace Core::Crypto {
@ -66,8 +63,7 @@ KeyManager::KeyManager() {
AttemptLoadKeyFile(yuzu_keys_dir, hactool_keys_dir, "title.keys", true);
}
void KeyManager::LoadFromFile(std::string_view filename_, bool is_title_keys) {
const auto filename = std::string(filename_);
void KeyManager::LoadFromFile(const std::string& filename, bool is_title_keys) {
std::ifstream file(filename);
if (!file.is_open())
return;
@ -107,11 +103,8 @@ void KeyManager::LoadFromFile(std::string_view filename_, bool is_title_keys) {
}
}
void KeyManager::AttemptLoadKeyFile(std::string_view dir1_, std::string_view dir2_,
std::string_view filename_, bool title) {
const std::string dir1(dir1_);
const std::string dir2(dir2_);
const std::string filename(filename_);
void KeyManager::AttemptLoadKeyFile(const std::string& dir1, const std::string& dir2,
const std::string& filename, bool title) {
if (FileUtil::Exists(dir1 + DIR_SEP + filename))
LoadFromFile(dir1 + DIR_SEP + filename, title);
else if (FileUtil::Exists(dir2 + DIR_SEP + filename))

7
src/core/crypto/key_manager.h
View file

@ -5,6 +5,7 @@
#pragma once
#include <array>
#include <string>
#include <type_traits>
#include <unordered_map>
#include <vector>
@ -109,9 +110,9 @@ private:
std::unordered_map<KeyIndex<S256KeyType>, Key256> s256_keys;
bool dev_mode;
void LoadFromFile(std::string_view filename, bool is_title_keys);
void AttemptLoadKeyFile(std::string_view dir1, std::string_view dir2, std::string_view filename,
bool title);
void LoadFromFile(const std::string& filename, bool is_title_keys);
void AttemptLoadKeyFile(const std::string& dir1, const std::string& dir2,
const std::string& filename, bool title);
static const std::unordered_map<std::string, KeyIndex<S128KeyType>> s128_file_id;
static const std::unordered_map<std::string, KeyIndex<S256KeyType>> s256_file_id;