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Atmosphere-libs/libexosphere/source/se/se_aes.cpp

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/*
* 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 <exosphere.hpp>
#include "se_execute.hpp"
namespace ams::se {
namespace {
constexpr inline int AesKeySizeMax = 256 / BITSIZEOF(u8);
enum AesMode {
AesMode_Aes128 = ((SE_CONFIG_ENC_MODE_AESMODE_KEY128 << SE_CONFIG_ENC_MODE_OFFSET) | (SE_CONFIG_DEC_MODE_AESMODE_KEY128 << SE_CONFIG_DEC_MODE_OFFSET)) >> SE_CONFIG_DEC_MODE_OFFSET,
AesMode_Aes192 = ((SE_CONFIG_ENC_MODE_AESMODE_KEY192 << SE_CONFIG_ENC_MODE_OFFSET) | (SE_CONFIG_DEC_MODE_AESMODE_KEY192 << SE_CONFIG_DEC_MODE_OFFSET)) >> SE_CONFIG_DEC_MODE_OFFSET,
AesMode_Aes256 = ((SE_CONFIG_ENC_MODE_AESMODE_KEY256 << SE_CONFIG_ENC_MODE_OFFSET) | (SE_CONFIG_DEC_MODE_AESMODE_KEY256 << SE_CONFIG_DEC_MODE_OFFSET)) >> SE_CONFIG_DEC_MODE_OFFSET,
};
enum MemoryInterface {
MemoryInterface_Ahb = SE_CRYPTO_CONFIG_MEMIF_AHB,
MemoryInterface_Mc = SE_CRYPTO_CONFIG_MEMIF_MCCIF,
};
constexpr inline u32 AesConfigEcb = reg::Encode(SE_REG_BITS_VALUE(CRYPTO_CONFIG_CTR_CNTN, 0),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_KEYSCH_BYPASS, DISABLE),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_IV_SELECT, ORIGINAL),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_VCTRAM_SEL, MEMORY),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_INPUT_SEL, MEMORY),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_XOR_POS, BYPASS),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_HASH_ENB, DISABLE));
constexpr inline u32 AesConfigCtr = reg::Encode(SE_REG_BITS_VALUE(CRYPTO_CONFIG_CTR_CNTN, 1),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_KEYSCH_BYPASS, DISABLE),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_IV_SELECT, ORIGINAL),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_VCTRAM_SEL, MEMORY),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_INPUT_SEL, LINEAR_CTR),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_XOR_POS, BOTTOM),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_HASH_ENB, DISABLE));
constexpr inline u32 AesConfigCmac = reg::Encode(SE_REG_BITS_VALUE(CRYPTO_CONFIG_CTR_CNTN, 0),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_KEYSCH_BYPASS, DISABLE),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_IV_SELECT, ORIGINAL),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_VCTRAM_SEL, INIT_AESOUT),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_INPUT_SEL, MEMORY),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_XOR_POS, TOP),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_HASH_ENB, ENABLE));
constexpr inline u32 AesConfigCbcEncrypt = reg::Encode(SE_REG_BITS_VALUE(CRYPTO_CONFIG_CTR_CNTN, 0),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_KEYSCH_BYPASS, DISABLE),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_IV_SELECT, ORIGINAL),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_VCTRAM_SEL, INIT_AESOUT),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_INPUT_SEL, MEMORY),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_XOR_POS, TOP),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_HASH_ENB, DISABLE));
constexpr inline u32 AesConfigCbcDecrypt = reg::Encode(SE_REG_BITS_VALUE(CRYPTO_CONFIG_CTR_CNTN, 0),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_KEYSCH_BYPASS, DISABLE),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_IV_SELECT, ORIGINAL),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_VCTRAM_SEL, INIT_PREV_MEMORY),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_INPUT_SEL, MEMORY),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_XOR_POS, BOTTOM),
SE_REG_BITS_ENUM (CRYPTO_CONFIG_HASH_ENB, DISABLE));
void SetConfig(volatile SecurityEngineRegisters *SE, bool encrypt, SE_CONFIG_DST dst) {
reg::Write(SE->SE_CONFIG, SE_REG_BITS_ENUM (CONFIG_ENC_MODE, AESMODE_KEY128),
SE_REG_BITS_ENUM (CONFIG_DEC_MODE, AESMODE_KEY128),
SE_REG_BITS_ENUM_SEL(CONFIG_ENC_ALG, encrypt, AES_ENC, NOP),
SE_REG_BITS_ENUM_SEL(CONFIG_DEC_ALG, encrypt, NOP, AES_DEC),
SE_REG_BITS_VALUE (CONFIG_DST, dst));
}
void SetAesConfig(volatile SecurityEngineRegisters *SE, int slot, bool encrypt, u32 config) {
const u32 encoded = reg::Encode(SE_REG_BITS_ENUM (CRYPTO_CONFIG_MEMIF, AHB),
SE_REG_BITS_VALUE (CRYPTO_CONFIG_KEY_INDEX, slot),
SE_REG_BITS_ENUM_SEL(CRYPTO_CONFIG_CORE_SEL, encrypt, ENCRYPT, DECRYPT));
reg::Write(SE->SE_CRYPTO_CONFIG, (config | encoded));
}
void SetBlockCount(volatile SecurityEngineRegisters *SE, int count) {
reg::Write(SE->SE_CRYPTO_LAST_BLOCK, count - 1);
}
void UpdateAesMode(volatile SecurityEngineRegisters *SE, AesMode mode) {
reg::ReadWrite(SE->SE_CONFIG, REG_BITS_VALUE(16, 16, mode));
}
void UpdateMemoryInterface(volatile SecurityEngineRegisters *SE, MemoryInterface memif) {
reg::ReadWrite(SE->SE_CRYPTO_CONFIG, SE_REG_BITS_VALUE(CRYPTO_CONFIG_MEMIF, memif));
}
void SetCounter(volatile SecurityEngineRegisters *SE, const void *ctr) {
const u32 *ctr_32 = reinterpret_cast<const u32 *>(ctr);
/* Copy the input ctr to the linear CTR registers. */
reg::Write(SE->SE_CRYPTO_LINEAR_CTR[0], util::LoadLittleEndian(ctr_32 + 0));
reg::Write(SE->SE_CRYPTO_LINEAR_CTR[1], util::LoadLittleEndian(ctr_32 + 1));
reg::Write(SE->SE_CRYPTO_LINEAR_CTR[2], util::LoadLittleEndian(ctr_32 + 2));
reg::Write(SE->SE_CRYPTO_LINEAR_CTR[3], util::LoadLittleEndian(ctr_32 + 3));
}
void SetAesKeyIv(volatile SecurityEngineRegisters *SE, int slot, const void *iv, size_t iv_size) {
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
AMS_ABORT_UNLESS(iv_size <= AesBlockSize);
/* Set each iv word in order. */
const u32 *iv_u32 = static_cast<const u32 *>(iv);
const int num_words = iv_size / sizeof(u32);
for (int i = 0; i < num_words; ++i) {
/* Select the keyslot. */
reg::Write(SE->SE_CRYPTO_KEYTABLE_ADDR, SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_SLOT, slot),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_KEYIV_SEL, IV),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_IV_SEL, ORIGINAL_IV),
SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_WORD, i));
/* Set the iv word. */
SE->SE_CRYPTO_KEYTABLE_DATA = *(iv_u32++);
}
}
void SetEncryptedAesKey(int dst_slot, int kek_slot, const void *key, size_t key_size, AesMode mode) {
AMS_ABORT_UNLESS(key_size <= AesKeySizeMax);
AMS_ABORT_UNLESS(0 <= dst_slot && dst_slot < AesKeySlotCount);
AMS_ABORT_UNLESS(0 <= kek_slot && kek_slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Configure for single AES ECB decryption to key table. */
SetConfig(SE, false, SE_CONFIG_DST_KEYTABLE);
SetAesConfig(SE, kek_slot, false, AesConfigEcb);
UpdateAesMode(SE, mode);
SetBlockCount(SE, 1);
/* Select the destination keyslot. */
reg::Write(SE->SE_CRYPTO_KEYTABLE_DST, SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_DST_KEY_INDEX, dst_slot), SE_REG_BITS_ENUM(CRYPTO_KEYTABLE_DST_WORD_QUAD, KEYS_0_3));
/* Ensure that the se sees the keydata we want it to. */
hw::FlushDataCache(key, key_size);
hw::DataSynchronizationBarrierInnerShareable();
/* Execute the operation. */
ExecuteOperation(SE, SE_OPERATION_OP_START, nullptr, 0, key, key_size);
}
void EncryptAes(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, AesMode mode) {
/* If nothing to decrypt, succeed. */
if (src_size == 0) { return; }
/* Validate input. */
AMS_ABORT_UNLESS(dst_size == AesBlockSize);
AMS_ABORT_UNLESS(src_size == AesBlockSize);
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Configure for AES-ECB encryption to memory. */
SetConfig(SE, true, SE_CONFIG_DST_MEMORY);
SetAesConfig(SE, slot, true, AesConfigEcb);
UpdateAesMode(SE, mode);
/* Execute the operation. */
ExecuteOperationSingleBlock(SE, dst, dst_size, src, src_size);
}
void ExpandSubkey(u8 *subkey) {
/* Shift everything left one bit. */
u8 prev = 0;
for (int i = AesBlockSize - 1; i >= 0; --i) {
const u8 top = (subkey[i] >> 7);
subkey[i] = ((subkey[i] << 1) | prev);
prev = top;
}
/* And xor with Rb if necessary. */
if (prev != 0) {
subkey[AesBlockSize - 1] ^= 0x87;
}
}
void ExpandSubkeyLittleEndian(u8 *subkey) {
/* Shift everything left one bit. */
u8 prev = 0;
for (size_t i = 0; i < AesBlockSize; ++i) {
const u8 top = (subkey[i] >> 7);
subkey[i] = ((subkey[i] << 1) | prev);
prev = top;
}
/* And xor with Rb if necessary. */
if (prev != 0) {
subkey[0] ^= 0x87;
}
}
void GetCmacResult(volatile SecurityEngineRegisters *SE, void *dst, size_t dst_size) {
const int num_words = dst_size / sizeof(u32);
for (int i = 0; i < num_words; ++i) {
reg::Write(static_cast<u32 *>(dst) + i, reg::Read(SE->SE_HASH_RESULT[i]));
}
}
void ComputeAesCmac(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, AesMode mode) {
/* Validate input. */
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Determine mac extents. */
const int num_blocks = util::DivideUp(src_size, AesBlockSize);
const size_t last_block_size = (src_size == 0) ? 0 : (src_size - ((num_blocks - 1) * AesBlockSize));
/* Create subkey. */
u8 subkey[AesBlockSize];
{
/* Encrypt zeroes. */
std::memset(subkey, 0, sizeof(subkey));
EncryptAes(subkey, sizeof(subkey), slot, subkey, sizeof(subkey), mode);
/* Expand. */
ExpandSubkey(subkey);
/* Account for last block. */
if (last_block_size != AesBlockSize) {
ExpandSubkey(subkey);
}
}
/* Configure for AES-CMAC. */
SetConfig(SE, true, SE_CONFIG_DST_HASH_REG);
SetAesConfig(SE, slot, true, AesConfigCmac);
UpdateAesMode(SE, mode);
/* Set the IV to zero. */
for (int i = 0; i < 4; ++i) {
/* Select the keyslot. */
reg::Write(SE->SE_CRYPTO_KEYTABLE_ADDR, SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_SLOT, slot),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_KEYIV_SEL, IV),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_IV_SEL, ORIGINAL_IV),
SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_WORD, i));
/* Set the iv word. */
SE->SE_CRYPTO_KEYTABLE_DATA = 0;
}
/* Handle blocks before the last. */
if (num_blocks > 1) {
SetBlockCount(SE, num_blocks - 1);
ExecuteOperation(SE, SE_OPERATION_OP_START, nullptr, 0, src, src_size);
reg::ReadWrite(SE->SE_CRYPTO_CONFIG, SE_REG_BITS_ENUM(CRYPTO_CONFIG_IV_SELECT, UPDATED));
}
/* Handle the last block. */
{
SetBlockCount(SE, 1);
/* Create the last block. */
u8 last_block[AesBlockSize];
if (last_block_size < sizeof(last_block)) {
std::memset(last_block, 0, sizeof(last_block));
last_block[last_block_size] = 0x80;
}
std::memcpy(last_block, static_cast<const u8 *>(src) + src_size - last_block_size, last_block_size);
/* Xor with the subkey. */
for (size_t i = 0; i < AesBlockSize; ++i) {
last_block[i] ^= subkey[i];
}
/* Ensure the SE sees correct data. */
hw::FlushDataCache(last_block, sizeof(last_block));
hw::DataSynchronizationBarrierInnerShareable();
ExecuteOperation(SE, SE_OPERATION_OP_START, nullptr, 0, last_block, sizeof(last_block));
}
/* Get the output. */
GetCmacResult(SE, dst, dst_size);
}
void EncryptAesCbc(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, const void *iv, size_t iv_size, AesMode mode) {
/* If nothing to encrypt, succeed. */
if (src_size == 0) { return; }
/* Validate input. */
AMS_ABORT_UNLESS(iv_size == AesBlockSize);
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Determine extents. */
const size_t num_blocks = src_size / AesBlockSize;
const size_t aligned_size = num_blocks * AesBlockSize;
AMS_ABORT_UNLESS(src_size == aligned_size);
/* Configure for aes-cbc encryption. */
SetConfig(SE, true, SE_CONFIG_DST_MEMORY);
SetAesConfig(SE, slot, true, AesConfigCbcEncrypt);
UpdateAesMode(SE, mode);
/* Set the iv. */
SetAesKeyIv(SE, slot, iv, iv_size);
/* Set the block count. */
SetBlockCount(SE, num_blocks);
/* Execute the operation. */
ExecuteOperation(SE, SE_OPERATION_OP_START, dst, dst_size, src, aligned_size);
}
void DecryptAesCbc(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, const void *iv, size_t iv_size, AesMode mode) {
/* If nothing to decrypt, succeed. */
if (src_size == 0) { return; }
/* Validate input. */
AMS_ABORT_UNLESS(iv_size == AesBlockSize);
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Determine extents. */
const size_t num_blocks = src_size / AesBlockSize;
const size_t aligned_size = num_blocks * AesBlockSize;
AMS_ABORT_UNLESS(src_size == aligned_size);
/* Configure for aes-cbc encryption. */
SetConfig(SE, false, SE_CONFIG_DST_MEMORY);
SetAesConfig(SE, slot, false, AesConfigCbcDecrypt);
UpdateAesMode(SE, mode);
/* Set the iv. */
SetAesKeyIv(SE, slot, iv, iv_size);
/* Set the block count. */
SetBlockCount(SE, num_blocks);
/* Execute the operation. */
ExecuteOperation(SE, SE_OPERATION_OP_START, dst, dst_size, src, aligned_size);
}
void XorWithXtsTweak(void *dst, size_t dst_size, const void *src, size_t src_size, const void *base_tweak) {
/* Copy tweak. */
u8 tweak[se::AesBlockSize];
std::memcpy(tweak, base_tweak, sizeof(tweak));
/* Perform xor. */
u8 *dst_u8 = static_cast<u8 *>(dst);
const u8 *src_u8 = static_cast<const u8 *>(src);
const size_t num_blocks = std::min<size_t>(dst_size, src_size) / sizeof(tweak);
for (size_t i = 0; i < num_blocks; ++i) {
for (size_t j = 0; j < sizeof(tweak); ++j) {
dst_u8[j] = src_u8[j] ^ tweak[j];
}
dst_u8 += sizeof(tweak);
src_u8 += sizeof(tweak);
ExpandSubkeyLittleEndian(tweak);
}
}
void DecryptAesXts(void *dst, size_t dst_size, int slot_enc, int slot_tweak, const void *src, size_t src_size, size_t sector, AesMode mode) {
/* If nothing to decrypt, succeed. */
if (src_size == 0) { return; }
/* Validate input. */
AMS_ABORT_UNLESS(util::IsAligned(dst_size, AesBlockSize));
AMS_ABORT_UNLESS(util::IsAligned(src_size, AesBlockSize));
AMS_ABORT_UNLESS(0 <= slot_enc && slot_enc < AesKeySlotCount);
AMS_ABORT_UNLESS(0 <= slot_tweak && slot_tweak < AesKeySlotCount);
/* Generate tweak. */
u32 base_tweak[se::AesBlockSize / sizeof(u32)] = {};
base_tweak[util::size(base_tweak) - 1] = util::ConvertToBigEndian<u32>(static_cast<u32>(sector));
if constexpr (sizeof(sector) > sizeof(u32)) {
static_assert(sizeof(sector) <= sizeof(u64));
base_tweak[util::size(base_tweak) - 2] = util::ConvertToBigEndian<u32>(static_cast<u32>(sector >> BITSIZEOF(u32)));
}
se::EncryptAes128(base_tweak, sizeof(base_tweak), slot_tweak, base_tweak, sizeof(base_tweak));
/* Xor all data. */
XorWithXtsTweak(dst, dst_size, src, src_size, base_tweak);
/* Ensure the SE sees correct data. */
hw::FlushDataCache(dst, dst_size);
/* Decrypt all data. */
{
/* Get the engine. */
auto *SE = GetRegisters();
/* Determine extents. */
const size_t num_blocks = dst_size / AesBlockSize;
/* Configure for AES-ECB decryption to memory. */
SetConfig(SE, false, SE_CONFIG_DST_MEMORY);
SetAesConfig(SE, slot_enc, false, AesConfigEcb);
UpdateAesMode(SE, mode);
/* Set the block count. */
SetBlockCount(SE, num_blocks);
/* Execute the operation. */
ExecuteOperation(SE, SE_OPERATION_OP_START, dst, dst_size, dst, dst_size);
/* Ensure the cpu sees correct data. */
hw::InvalidateDataCache(dst, dst_size);
}
/* Xor all data. */
XorWithXtsTweak(dst, dst_size, dst, dst_size, base_tweak);
}
void ComputeAes128Async(u32 out_ll_address, int slot, u32 in_ll_address, u32 size, DoneHandler handler, u32 config, bool encrypt, volatile SecurityEngineRegisters *SE) {
/* If nothing to decrypt, succeed. */
if (size == 0) { return; }
/* Validate input. */
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Configure for the specific operation. */
SetConfig(SE, encrypt, SE_CONFIG_DST_MEMORY);
SetAesConfig(SE, slot, encrypt, config);
UpdateMemoryInterface(SE, MemoryInterface_Mc);
/* Configure the number of blocks. */
const int num_blocks = size / AesBlockSize;
SetBlockCount(SE, num_blocks);
/* Set the done handler. */
SetDoneHandler(SE, handler);
/* Start the raw operation. */
StartOperationRaw(SE, SE_OPERATION_OP_START, out_ll_address, in_ll_address);
}
void ClearAesKeySlot(volatile SecurityEngineRegisters *SE, int slot) {
/* Validate the key slot. */
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
for (int i = 0; i < 16; ++i) {
/* Select the keyslot. */
reg::Write(SE->SE_CRYPTO_KEYTABLE_ADDR, SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_SLOT, slot), SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_WORD, i));
/* Write the data. */
SE->SE_CRYPTO_KEYTABLE_DATA = 0;
}
}
}
void ClearAesKeySlot(int slot) {
/* Clear the slot in SE1. */
ClearAesKeySlot(GetRegisters(), slot);
}
void ClearAesKeySlot2(int slot) {
/* Clear the slot in SE2. */
ClearAesKeySlot(GetRegisters2(), slot);
}
void ClearAesKeyIv(int slot) {
/* Validate the key slot. */
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Set each iv word in order. */
for (int i = 0; i < 4; ++i) {
/* Select the keyslot original iv. */
reg::Write(SE->SE_CRYPTO_KEYTABLE_ADDR, SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_SLOT, slot),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_KEYIV_SEL, IV),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_IV_SEL, ORIGINAL_IV),
SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_WORD, i));
/* Set the iv word. */
SE->SE_CRYPTO_KEYTABLE_DATA = 0;
/* Select the keyslot updated iv. */
reg::Write(SE->SE_CRYPTO_KEYTABLE_ADDR, SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_SLOT, slot),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_KEYIV_SEL, IV),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_IV_SEL, UPDATED_IV),
SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_WORD, i));
/* Set the iv word. */
SE->SE_CRYPTO_KEYTABLE_DATA = 0;
}
}
void LockAesKeySlot(int slot, u32 flags) {
/* Validate the key slot. */
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Set non per-key flags. */
if ((flags & ~KeySlotLockFlags_PerKey) != 0) {
/* KeySlotLockFlags_DstKeyTableOnly is Mariko-only. */
if (fuse::GetSocType() == fuse::SocType_Mariko) {
reg::ReadWrite(SE->SE_CRYPTO_KEYTABLE_ACCESS[slot], REG_BITS_VALUE(0, 7, ~flags), REG_BITS_VALUE(7, 1, ((flags & KeySlotLockFlags_DstKeyTableOnly) != 0) ? 1 : 0));
} else {
reg::ReadWrite(SE->SE_CRYPTO_KEYTABLE_ACCESS[slot], REG_BITS_VALUE(0, 7, ~flags));
}
}
/* Set per-key flag. */
if ((flags & KeySlotLockFlags_PerKey) != 0) {
reg::ReadWrite(SE->SE_CRYPTO_SECURITY_PERKEY, REG_BITS_VALUE(slot, 1, 0));
}
}
void SetAesKey(int slot, const void *key, size_t key_size) {
/* Validate the key slot and key size. */
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
AMS_ABORT_UNLESS(key_size <= AesKeySizeMax);
/* Get the engine. */
auto *SE = GetRegisters();
/* Set each key word in order. */
const u32 *key_u32 = static_cast<const u32 *>(key);
const int num_words = key_size / sizeof(u32);
for (int i = 0; i < num_words; ++i) {
/* Select the keyslot. */
reg::Write(SE->SE_CRYPTO_KEYTABLE_ADDR, SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_SLOT, slot),
SE_REG_BITS_ENUM (CRYPTO_KEYTABLE_ADDR_KEYIV_KEYIV_SEL, KEY),
SE_REG_BITS_VALUE(CRYPTO_KEYTABLE_ADDR_KEYIV_KEY_WORD, i));
/* Set the key word. */
SE->SE_CRYPTO_KEYTABLE_DATA = *(key_u32++);
}
}
void SetEncryptedAesKey128(int dst_slot, int kek_slot, const void *key, size_t key_size) {
return SetEncryptedAesKey(dst_slot, kek_slot, key, key_size, AesMode_Aes128);
}
void SetEncryptedAesKey256(int dst_slot, int kek_slot, const void *key, size_t key_size) {
return SetEncryptedAesKey(dst_slot, kek_slot, key, key_size, AesMode_Aes256);
}
void EncryptAes128(void *dst, size_t dst_size, int slot, const void *src, size_t src_size) {
return EncryptAes(dst, dst_size, slot, src, src_size, AesMode_Aes128);
}
void DecryptAes128(void *dst, size_t dst_size, int slot, const void *src, size_t src_size) {
/* If nothing to decrypt, succeed. */
if (src_size == 0) { return; }
/* Validate input. */
AMS_ABORT_UNLESS(dst_size == AesBlockSize);
AMS_ABORT_UNLESS(src_size == AesBlockSize);
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Configure for AES-ECB decryption to memory. */
SetConfig(SE, false, SE_CONFIG_DST_MEMORY);
SetAesConfig(SE, slot, false, AesConfigEcb);
ExecuteOperationSingleBlock(SE, dst, dst_size, src, src_size);
}
void ComputeAes128Ctr(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, const void *iv, size_t iv_size) {
/* If nothing to do, succeed. */
if (src_size == 0) { return; }
/* Validate input. */
AMS_ABORT_UNLESS(iv_size == AesBlockSize);
AMS_ABORT_UNLESS(0 <= slot && slot < AesKeySlotCount);
/* Get the engine. */
auto *SE = GetRegisters();
/* Determine how many full blocks we can operate on. */
const size_t num_blocks = src_size / AesBlockSize;
const size_t aligned_size = num_blocks * AesBlockSize;
const size_t fractional = src_size - aligned_size;
/* Here Nintendo writes 1 to SE_SPARE. It's unclear why they do this, but we will do so as well. */
SE->SE_SPARE = 0x1;
/* Configure for AES-CTR encryption/decryption to memory. */
SetConfig(SE, true, SE_CONFIG_DST_MEMORY);
SetAesConfig(SE, slot, true, AesConfigCtr);
/* Set the counter. */
SetCounter(SE, iv);
/* Process as many aligned blocks as we can. */
if (aligned_size > 0) {
/* Configure the engine to process the right number of blocks. */
SetBlockCount(SE, num_blocks);
/* Execute the operation. */
ExecuteOperation(SE, SE_OPERATION_OP_START, dst, dst_size, src, aligned_size);
/* Synchronize around this point. */
hw::DataSynchronizationBarrierInnerShareable();
}
/* Process a single block to output. */
if (fractional > 0 && dst_size > aligned_size) {
const size_t copy_size = std::min(fractional, dst_size - aligned_size);
ExecuteOperationSingleBlock(SE, static_cast<u8 *>(dst) + aligned_size, copy_size, static_cast<const u8 *>(src) + aligned_size, fractional);
}
}
void ComputeAes128Cmac(void *dst, size_t dst_size, int slot, const void *src, size_t src_size) {
return ComputeAesCmac(dst, dst_size, slot, src, src_size, AesMode_Aes128);
}
void ComputeAes256Cmac(void *dst, size_t dst_size, int slot, const void *src, size_t src_size) {
return ComputeAesCmac(dst, dst_size, slot, src, src_size, AesMode_Aes256);
}
void EncryptAes128Cbc(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, const void *iv, size_t iv_size) {
return EncryptAesCbc(dst, dst_size, slot, src, src_size, iv, iv_size, AesMode_Aes128);
}
void EncryptAes256Cbc(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, const void *iv, size_t iv_size) {
return EncryptAesCbc(dst, dst_size, slot, src, src_size, iv, iv_size, AesMode_Aes256);
}
void DecryptAes128Cbc(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, const void *iv, size_t iv_size) {
return DecryptAesCbc(dst, dst_size, slot, src, src_size, iv, iv_size, AesMode_Aes128);
}
void DecryptAes256Cbc(void *dst, size_t dst_size, int slot, const void *src, size_t src_size, const void *iv, size_t iv_size) {
return DecryptAesCbc(dst, dst_size, slot, src, src_size, iv, iv_size, AesMode_Aes256);
}
void DecryptAes128Xts(void *dst, size_t dst_size, int slot_enc, int slot_tweak, const void *src, size_t src_size, size_t sector) {
return DecryptAesXts(dst, dst_size, slot_enc, slot_tweak, src, src_size, sector, AesMode_Aes128);
}
void EncryptAes128CbcAsync(u32 out_ll_address, int slot, u32 in_ll_address, u32 size, const void *iv, size_t iv_size, DoneHandler handler) {
/* Validate the iv. */
AMS_ABORT_UNLESS(iv_size == AesBlockSize);
/* Get the registers. */
volatile auto *SE = GetRegisters();
/* Set the iv. */
SetAesKeyIv(SE, slot, iv, iv_size);
/* Perform the asynchronous aes operation. */
ComputeAes128Async(out_ll_address, slot, in_ll_address, size, handler, AesConfigCbcEncrypt, true, SE);
}
void DecryptAes128CbcAsync(u32 out_ll_address, int slot, u32 in_ll_address, u32 size, const void *iv, size_t iv_size, DoneHandler handler) {
/* Validate the iv. */
AMS_ABORT_UNLESS(iv_size == AesBlockSize);
/* Get the registers. */
volatile auto *SE = GetRegisters();
/* Set the iv. */
SetAesKeyIv(SE, slot, iv, iv_size);
/* Perform the asynchronous aes operation. */
ComputeAes128Async(out_ll_address, slot, in_ll_address, size, handler, AesConfigCbcDecrypt, false, SE);
}
void ComputeAes128CtrAsync(u32 out_ll_address, int slot, u32 in_ll_address, u32 size, const void *iv, size_t iv_size, DoneHandler handler) {
/* Validate the iv. */
AMS_ABORT_UNLESS(iv_size == AesBlockSize);
/* Get the registers. */
volatile auto *SE = GetRegisters();
/* Here Nintendo writes 1 to SE_SPARE. It's unclear why they do this, but we will do so as well. */
SE->SE_SPARE = 0x1;
/* Set the counter. */
SetCounter(SE, iv);
/* Perform the asynchronous aes operation. */
ComputeAes128Async(out_ll_address, slot, in_ll_address, size, handler, AesConfigCtr, true, SE);
}
}
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