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Make XCI comply to review and style guidelines

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This commit is contained in:
Zach Hilman 2018-07-28 21:39:42 -04:00
parent 22342487e8
commit 239a3113e4
16 changed files with 223 additions and 482 deletions
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82
src/core/crypto/aes_util.cpp
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@ -2,58 +2,69 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <mbedtls/cipher.h>
#include "core/crypto/aes_util.h"
#include "mbedtls/cipher.h"
#include "core/crypto/key_manager.h"
namespace Core::Crypto {
static_assert(static_cast<size_t>(Mode::CTR) == static_cast<size_t>(MBEDTLS_CIPHER_AES_128_CTR), "CTR mode is incorrect.");
static_assert(static_cast<size_t>(Mode::ECB) == static_cast<size_t>(MBEDTLS_CIPHER_AES_128_ECB), "ECB mode is incorrect.");
static_assert(static_cast<size_t>(Mode::XTS) == static_cast<size_t>(MBEDTLS_CIPHER_AES_128_XTS), "XTS mode is incorrect.");
template<typename Key, size_t KeySize>
Crypto::AESCipher<Key, KeySize>::AESCipher(Key key, Mode mode) {
mbedtls_cipher_init(encryption_context.get());
mbedtls_cipher_init(decryption_context.get());
static_assert(static_cast<size_t>(Mode::CTR) == static_cast<size_t>(MBEDTLS_CIPHER_AES_128_CTR),
"CTR has incorrect value.");
static_assert(static_cast<size_t>(Mode::ECB) == static_cast<size_t>(MBEDTLS_CIPHER_AES_128_ECB),
"ECB has incorrect value.");
static_assert(static_cast<size_t>(Mode::XTS) == static_cast<size_t>(MBEDTLS_CIPHER_AES_128_XTS),
"XTS has incorrect value.");
// Structure to hide mbedtls types from header file
struct CipherContext {
mbedtls_cipher_context_t encryption_context;
mbedtls_cipher_context_t decryption_context;
};
template <typename Key, size_t KeySize>
Crypto::AESCipher<Key, KeySize>::AESCipher(Key key, Mode mode)
: ctx(std::make_unique<CipherContext>()) {
mbedtls_cipher_init(&ctx->encryption_context);
mbedtls_cipher_init(&ctx->decryption_context);
ASSERT_MSG((mbedtls_cipher_setup(
encryption_context.get(),
mbedtls_cipher_info_from_type(static_cast<mbedtls_cipher_type_t>(mode))) ||
mbedtls_cipher_setup(decryption_context.get(),
mbedtls_cipher_info_from_type(
static_cast<mbedtls_cipher_type_t>(mode)))) == 0,
&ctx->encryption_context,
mbedtls_cipher_info_from_type(static_cast<mbedtls_cipher_type_t>(mode))) ||
mbedtls_cipher_setup(
&ctx->decryption_context,
mbedtls_cipher_info_from_type(static_cast<mbedtls_cipher_type_t>(mode)))) == 0,
"Failed to initialize mbedtls ciphers.");
ASSERT(
!mbedtls_cipher_setkey(encryption_context.get(), key.data(), KeySize * 8, MBEDTLS_ENCRYPT));
!mbedtls_cipher_setkey(&ctx->encryption_context, key.data(), KeySize * 8, MBEDTLS_ENCRYPT));
ASSERT(
!mbedtls_cipher_setkey(decryption_context.get(), key.data(), KeySize * 8, MBEDTLS_DECRYPT));
!mbedtls_cipher_setkey(&ctx->decryption_context, key.data(), KeySize * 8, MBEDTLS_DECRYPT));
//"Failed to set key on mbedtls ciphers.");
}
template<typename Key, size_t KeySize>
template <typename Key, size_t KeySize>
AESCipher<Key, KeySize>::~AESCipher() {
mbedtls_cipher_free(encryption_context.get());
mbedtls_cipher_free(decryption_context.get());
mbedtls_cipher_free(&ctx->encryption_context);
mbedtls_cipher_free(&ctx->decryption_context);
}
template<typename Key, size_t KeySize>
template <typename Key, size_t KeySize>
void AESCipher<Key, KeySize>::SetIV(std::vector<u8> iv) {
ASSERT_MSG((mbedtls_cipher_set_iv(encryption_context.get(), iv.data(), iv.size()) ||
mbedtls_cipher_set_iv(decryption_context.get(), iv.data(), iv.size())) == 0,
ASSERT_MSG((mbedtls_cipher_set_iv(&ctx->encryption_context, iv.data(), iv.size()) ||
mbedtls_cipher_set_iv(&ctx->decryption_context, iv.data(), iv.size())) == 0,
"Failed to set IV on mbedtls ciphers.");
}
template<typename Key, size_t KeySize>
void AESCipher<Key, KeySize>::Transcode(const u8* src, size_t size, u8* dest, Op op) {
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 ? encryption_context.get() : decryption_context.get();
const auto context = op == Op::Encrypt ? &ctx->encryption_context : &ctx->decryption_context;
mbedtls_cipher_reset(context);
if (mbedtls_cipher_get_cipher_mode(context) == MBEDTLS_MODE_XTS) {
mbedtls_cipher_update(context, src, size,
dest, &written);
mbedtls_cipher_update(context, src, size, dest, &written);
if (written != size)
LOG_WARNING(Crypto, "Not all data was decrypted requested={:016X}, actual={:016X}.",
size, written);
@ -62,11 +73,9 @@ void AESCipher<Key, KeySize>::Transcode(const u8* src, size_t size, u8* dest, Op
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);
mbedtls_cipher_update(context, src + offset, length, dest + offset, &written);
if (written != length)
LOG_WARNING(Crypto,
"Not all data was decrypted requested={:016X}, actual={:016X}.",
LOG_WARNING(Crypto, "Not all data was decrypted requested={:016X}, actual={:016X}.",
length, written);
}
}
@ -74,9 +83,9 @@ void AESCipher<Key, KeySize>::Transcode(const u8* src, size_t size, u8* dest, Op
mbedtls_cipher_finish(context, nullptr, nullptr);
}
template<typename Key, size_t KeySize>
void AESCipher<Key, KeySize>::XTSTranscode(const u8* src, size_t size, u8* dest, size_t sector_id, size_t sector_size,
Op op) {
template <typename Key, size_t KeySize>
void AESCipher<Key, KeySize>::XTSTranscode(const u8* src, size_t size, u8* dest, size_t sector_id,
size_t sector_size, Op op) {
if (size % sector_size > 0) {
LOG_CRITICAL(Crypto, "Data size must be a multiple of sector size.");
return;
@ -84,12 +93,11 @@ void AESCipher<Key, KeySize>::XTSTranscode(const u8* src, size_t size, u8* dest,
for (size_t i = 0; i < size; i += sector_size) {
SetIV(CalculateNintendoTweak(sector_id++));
Transcode<u8, u8>(src + i, sector_size,
dest + i, op);
Transcode<u8, u8>(src + i, sector_size, dest + i, op);
}
}
template<typename Key, size_t KeySize>
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) {
@ -101,4 +109,4 @@ std::vector<u8> AESCipher<Key, KeySize>::CalculateNintendoTweak(size_t sector_id
template class AESCipher<Key128>;
template class AESCipher<Key256>;
}
} // namespace Core::Crypto