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Lockpick_RCM/bdk/sec/se.c

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/*
* Copyright (c) 2018 naehrwert
* Copyright (c) 2018 CTCaer
* Copyright (c) 2018 Atmosphère-NX
* Copyright (c) 2019-2020 shchmue
*
* 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 <string.h>
#include "se.h"
#include "se_t210.h"
#include <memory_map.h>
#include <mem/heap.h>
#include <soc/bpmp.h>
#include <soc/pmc.h>
#include <soc/t210.h>
#include <utils/util.h>
typedef struct _se_ll_t
{
vu32 num;
vu32 addr;
vu32 size;
} se_ll_t;
static u32 _se_rsa_mod_sizes[TEGRA_SE_RSA_KEYSLOT_COUNT];
static u32 _se_rsa_exp_sizes[TEGRA_SE_RSA_KEYSLOT_COUNT];
static void _gf256_mul_x(void *block)
{
u8 *pdata = (u8 *)block;
u32 carry = 0;
for (int i = 0xF; i >= 0; i--)
{
u8 b = pdata[i];
pdata[i] = (b << 1) | carry;
carry = b >> 7;
}
if (carry)
pdata[0xF] ^= 0x87;
}
static void _gf256_mul_x_le(void *block)
{
u32 *pdata = (u32 *)block;
u32 carry = 0;
for (u32 i = 0; i < 4; i++)
{
u32 b = pdata[i];
pdata[i] = (b << 1) | carry;
carry = b >> 31;
}
if (carry)
pdata[0x0] ^= 0x87;
}
static void _se_ll_init(se_ll_t *ll, u32 addr, u32 size)
{
ll->num = 0;
ll->addr = addr;
ll->size = size;
}
static void _se_ll_set(se_ll_t *dst, se_ll_t *src)
{
SE(SE_IN_LL_ADDR_REG_OFFSET) = (u32)src;
SE(SE_OUT_LL_ADDR_REG_OFFSET) = (u32)dst;
}
static int _se_wait()
{
while (!(SE(SE_INT_STATUS_REG_OFFSET) & SE_INT_OP_DONE(INT_SET)))
;
if (SE(SE_INT_STATUS_REG_OFFSET) & SE_INT_ERROR(INT_SET) ||
SE(SE_STATUS_0) & SE_STATUS_0_STATE_WAIT_IN ||
SE(SE_ERR_STATUS_0) != SE_ERR_STATUS_0_SE_NS_ACCESS_CLEAR)
return 0;
return 1;
}
se_ll_t *ll_dst, *ll_src;
static int _se_execute(u32 op, void *dst, u32 dst_size, const void *src, u32 src_size, bool is_oneshot)
{
ll_dst = NULL;
ll_src = NULL;
if (dst)
{
ll_dst = (se_ll_t *)malloc(sizeof(se_ll_t));
_se_ll_init(ll_dst, (u32)dst, dst_size);
}
if (src)
{
ll_src = (se_ll_t *)malloc(sizeof(se_ll_t));
_se_ll_init(ll_src, (u32)src, src_size);
}
_se_ll_set(ll_dst, ll_src);
SE(SE_ERR_STATUS_0) = SE(SE_ERR_STATUS_0);
SE(SE_INT_STATUS_REG_OFFSET) = SE(SE_INT_STATUS_REG_OFFSET);
bpmp_mmu_maintenance(BPMP_MMU_MAINT_CLN_INV_WAY, false);
SE(SE_OPERATION_REG_OFFSET) = SE_OPERATION(op);
if (is_oneshot)
{
int res = _se_wait();
bpmp_mmu_maintenance(BPMP_MMU_MAINT_CLN_INV_WAY, false);
if (src)
free(ll_src);
if (dst)
free(ll_dst);
return res;
}
return 1;
}
static int _se_execute_finalize()
{
int res = _se_wait();
bpmp_mmu_maintenance(BPMP_MMU_MAINT_CLN_INV_WAY, false);
if (ll_src)
{
free(ll_src);
ll_src = NULL;
}
if (ll_dst)
{
free(ll_dst);
ll_dst = NULL;
}
return res;
}
static int _se_execute_oneshot(u32 op, void *dst, u32 dst_size, const void *src, u32 src_size)
{
return _se_execute(op, dst, dst_size, src, src_size, true);
}
static int _se_execute_one_block(u32 op, void *dst, u32 dst_size, const void *src, u32 src_size)
{
if (!src || !dst)
return 0;
u8 *block = (u8 *)malloc(0x10);
memset(block, 0, 0x10);
SE(SE_BLOCK_COUNT_REG_OFFSET) = 0;
memcpy(block, src, src_size);
int res = _se_execute_oneshot(op, block, 0x10, block, 0x10);
memcpy(dst, block, dst_size);
free(block);
return res;
}
static void _se_aes_ctr_set(void *ctr)
{
u32 data[TEGRA_SE_AES_BLOCK_SIZE / 4];
memcpy(data, ctr, TEGRA_SE_AES_BLOCK_SIZE);
for (u32 i = 0; i < (TEGRA_SE_AES_BLOCK_SIZE / 4); i++)
SE(SE_CRYPTO_CTR_REG_OFFSET + (4 * i)) = data[i];
}
void se_rsa_acc_ctrl(u32 rs, u32 flags)
{
if (flags & SE_RSA_KEY_TBL_DIS_KEY_ALL_FLAG)
SE(SE_RSA_KEYTABLE_ACCESS_REG_OFFSET + 4 * rs) =
((flags >> SE_RSA_KEY_TBL_DIS_KEYUSE_FLAG_SHIFT) & SE_RSA_KEY_TBL_DIS_KEYUSE_FLAG) |
((flags & SE_RSA_KEY_TBL_DIS_KEY_READ_UPDATE_FLAG) ^ SE_RSA_KEY_TBL_DIS_KEY_ALL_COMMON_FLAG);
if (flags & SE_RSA_KEY_TBL_DIS_KEY_LOCK_FLAG)
SE(SE_RSA_KEYTABLE_ACCESS_LOCK_OFFSET) &= ~BIT(rs);
}
// se_rsa_key_set() was derived from Atmosphère's set_rsa_keyslot
void se_rsa_key_set(u32 ks, const void *mod, u32 mod_size, const void *exp, u32 exp_size)
{
u32 *data = (u32 *)mod;
for (u32 i = 0; i < mod_size / 4; i++)
{
SE(SE_RSA_KEYTABLE_ADDR) = RSA_KEY_NUM(ks) | RSA_KEY_TYPE(RSA_KEY_TYPE_MOD) | i;
SE(SE_RSA_KEYTABLE_DATA) = byte_swap_32(data[mod_size / 4 - i - 1]);
}
data = (u32 *)exp;
for (u32 i = 0; i < exp_size / 4; i++)
{
SE(SE_RSA_KEYTABLE_ADDR) = RSA_KEY_NUM(ks) | RSA_KEY_TYPE(RSA_KEY_TYPE_EXP) | i;
SE(SE_RSA_KEYTABLE_DATA) = byte_swap_32(data[exp_size / 4 - i - 1]);
}
_se_rsa_mod_sizes[ks] = mod_size;
_se_rsa_exp_sizes[ks] = exp_size;
}
// se_rsa_key_clear() was derived from Atmosphère's clear_rsa_keyslot
void se_rsa_key_clear(u32 ks)
{
for (u32 i = 0; i < TEGRA_SE_RSA2048_DIGEST_SIZE / 4; i++)
{
SE(SE_RSA_KEYTABLE_ADDR) = RSA_KEY_NUM(ks) | RSA_KEY_TYPE(RSA_KEY_TYPE_MOD) | i;
SE(SE_RSA_KEYTABLE_DATA) = 0;
}
for (u32 i = 0; i < TEGRA_SE_RSA2048_DIGEST_SIZE / 4; i++)
{
SE(SE_RSA_KEYTABLE_ADDR) = RSA_KEY_NUM(ks) | RSA_KEY_TYPE(RSA_KEY_TYPE_EXP) | i;
SE(SE_RSA_KEYTABLE_DATA) = 0;
}
}
// se_rsa_exp_mod() was derived from Atmosphère's se_synchronous_exp_mod and se_get_exp_mod_output
int se_rsa_exp_mod(u32 ks, void *dst, u32 dst_size, const void *src, u32 src_size)
{
int res;
u8 stack_buf[TEGRA_SE_RSA2048_DIGEST_SIZE];
for (u32 i = 0; i < src_size; i++)
stack_buf[i] = *((u8 *)src + src_size - i - 1);
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_ALG(ALG_RSA) | SE_CONFIG_DST(DST_RSAREG);
SE(SE_RSA_CONFIG) = RSA_KEY_SLOT(ks);
SE(SE_RSA_KEY_SIZE_REG_OFFSET) = (_se_rsa_mod_sizes[ks] >> 6) - 1;
SE(SE_RSA_EXP_SIZE_REG_OFFSET) = _se_rsa_exp_sizes[ks] >> 2;
res = _se_execute_oneshot(OP_START, NULL, 0, stack_buf, src_size);
// Copy output hash.
u32 *dst32 = (u32 *)dst;
for (u32 i = 0; i < dst_size / 4; i++)
dst32[dst_size / 4 - i - 1] = byte_swap_32(SE(SE_RSA_OUTPUT + (i << 2)));
return res;
}
void se_key_acc_ctrl(u32 ks, u32 flags)
{
if (flags & SE_KEY_TBL_DIS_KEY_ACCESS_FLAG)
SE(SE_KEY_TABLE_ACCESS_REG_OFFSET + 4 * ks) = ~flags;
if (flags & SE_KEY_TBL_DIS_KEY_LOCK_FLAG)
SE(SE_KEY_TABLE_ACCESS_LOCK_OFFSET) &= ~BIT(ks);
}
u32 se_key_acc_ctrl_get(u32 ks)
{
return SE(SE_KEY_TABLE_ACCESS_REG_OFFSET + 4 * ks);
}
void se_aes_key_set(u32 ks, const void *key, u32 size)
{
u32 data[TEGRA_SE_AES_MAX_KEY_SIZE / 4];
memcpy(data, key, size);
for (u32 i = 0; i < (size / 4); i++)
{
SE(SE_KEYTABLE_REG_OFFSET) = SE_KEYTABLE_SLOT(ks) | i;
SE(SE_KEYTABLE_DATA0_REG_OFFSET) = data[i];
}
}
void se_aes_key_partial_set(u32 ks, u32 index, u32 data)
{
SE(SE_KEYTABLE_REG_OFFSET) = SE_KEYTABLE_SLOT(ks) | index;
SE(SE_KEYTABLE_DATA0_REG_OFFSET) = data;
}
void se_aes_iv_set(u32 ks, const void *iv)
{
u32 data[TEGRA_SE_AES_BLOCK_SIZE / 4];
memcpy(data, iv, TEGRA_SE_AES_BLOCK_SIZE);
for (u32 i = 0; i < (TEGRA_SE_AES_BLOCK_SIZE / 4); i++)
{
SE(SE_KEYTABLE_REG_OFFSET) = SE_KEYTABLE_SLOT(ks) | SE_KEYTABLE_QUAD(QUAD_ORG_IV) | i;
SE(SE_KEYTABLE_DATA0_REG_OFFSET) = data[i];
}
}
void se_aes_key_get(u32 ks, void *key, u32 size)
{
u32 data[TEGRA_SE_AES_MAX_KEY_SIZE / 4];
for (u32 i = 0; i < (size / 4); i++)
{
SE(SE_KEYTABLE_REG_OFFSET) = SE_KEYTABLE_SLOT(ks) | i;
data[i] = SE(SE_KEYTABLE_DATA0_REG_OFFSET);
}
memcpy(key, data, size);
}
void se_aes_key_clear(u32 ks)
{
for (u32 i = 0; i < (TEGRA_SE_AES_MAX_KEY_SIZE / 4); i++)
{
SE(SE_KEYTABLE_REG_OFFSET) = SE_KEYTABLE_SLOT(ks) | i;
SE(SE_KEYTABLE_DATA0_REG_OFFSET) = 0;
}
}
void se_aes_iv_clear(u32 ks)
{
for (u32 i = 0; i < (TEGRA_SE_AES_BLOCK_SIZE / 4); i++)
{
SE(SE_KEYTABLE_REG_OFFSET) = SE_KEYTABLE_SLOT(ks) | SE_KEYTABLE_QUAD(QUAD_ORG_IV) | i;
SE(SE_KEYTABLE_DATA0_REG_OFFSET) = 0;
}
}
int se_aes_unwrap_key(u32 ks_dst, u32 ks_src, const void *input)
{
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_DEC_ALG(ALG_AES_DEC) | SE_CONFIG_DST(DST_KEYTAB);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(ks_src) | SE_CRYPTO_CORE_SEL(CORE_DECRYPT);
SE(SE_BLOCK_COUNT_REG_OFFSET) = 0;
SE(SE_CRYPTO_KEYTABLE_DST_REG_OFFSET) = SE_CRYPTO_KEYTABLE_DST_KEY_INDEX(ks_dst);
return _se_execute_oneshot(OP_START, NULL, 0, input, 0x10);
}
int se_aes_crypt_ecb(u32 ks, u32 enc, void *dst, u32 dst_size, const void *src, u32 src_size)
{
if (enc)
{
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_ALG(ALG_AES_ENC) | SE_CONFIG_DST(DST_MEMORY);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(ks) | SE_CRYPTO_CORE_SEL(CORE_ENCRYPT);
}
else
{
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_DEC_ALG(ALG_AES_DEC) | SE_CONFIG_DST(DST_MEMORY);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(ks) | SE_CRYPTO_CORE_SEL(CORE_DECRYPT);
}
SE(SE_BLOCK_COUNT_REG_OFFSET) = (src_size >> 4) - 1;
return _se_execute_oneshot(OP_START, dst, dst_size, src, src_size);
}
int se_aes_crypt_cbc(u32 ks, u32 enc, void *dst, u32 dst_size, const void *src, u32 src_size)
{
if (enc)
{
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_ALG(ALG_AES_ENC) | SE_CONFIG_DST(DST_MEMORY);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(ks) | SE_CRYPTO_VCTRAM_SEL(VCTRAM_AESOUT) |
SE_CRYPTO_CORE_SEL(CORE_ENCRYPT) | SE_CRYPTO_XOR_POS(XOR_TOP);
}
else
{
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_DEC_ALG(ALG_AES_DEC) | SE_CONFIG_DST(DST_MEMORY);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(ks) | SE_CRYPTO_VCTRAM_SEL(VCTRAM_PREVAHB) |
SE_CRYPTO_CORE_SEL(CORE_DECRYPT) | SE_CRYPTO_XOR_POS(XOR_BOTTOM);
}
SE(SE_BLOCK_COUNT_REG_OFFSET) = (src_size >> 4) - 1;
return _se_execute_oneshot(OP_START, dst, dst_size, src, src_size);
}
int se_aes_crypt_block_ecb(u32 ks, u32 enc, void *dst, const void *src)
{
return se_aes_crypt_ecb(ks, enc, dst, 0x10, src, 0x10);
}
int se_aes_crypt_ctr(u32 ks, void *dst, u32 dst_size, const void *src, u32 src_size, void *ctr)
{
SE(SE_SPARE_0_REG_OFFSET) = 1;
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_ALG(ALG_AES_ENC) | SE_CONFIG_DST(DST_MEMORY);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(ks) | SE_CRYPTO_CORE_SEL(CORE_ENCRYPT) |
SE_CRYPTO_XOR_POS(XOR_BOTTOM) | SE_CRYPTO_INPUT_SEL(INPUT_LNR_CTR) | SE_CRYPTO_CTR_VAL(1);
_se_aes_ctr_set(ctr);
u32 src_size_aligned = src_size & 0xFFFFFFF0;
u32 src_size_delta = src_size & 0xF;
if (src_size_aligned)
{
SE(SE_BLOCK_COUNT_REG_OFFSET) = (src_size >> 4) - 1;
if (!_se_execute_oneshot(OP_START, dst, dst_size, src, src_size_aligned))
return 0;
}
if (src_size - src_size_aligned && src_size_aligned < dst_size)
return _se_execute_one_block(OP_START, dst + src_size_aligned,
MIN(src_size_delta, dst_size - src_size_aligned),
src + src_size_aligned, src_size_delta);
return 1;
}
// random calls were derived from Atmosphère's
int se_initialize_rng()
{
static bool initialized = false;
if (initialized)
return 1;
u8 *output_buf = (u8 *)malloc(0x10);
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_ALG(ALG_RNG) | SE_CONFIG_DST(DST_MEMORY);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_CORE_SEL(CORE_ENCRYPT) | SE_CRYPTO_INPUT_SEL(INPUT_RANDOM);
SE(SE_RNG_CONFIG_REG_OFFSET) = SE_RNG_CONFIG_MODE(RNG_MODE_FORCE_INSTANTION) | SE_RNG_CONFIG_SRC(RNG_SRC_ENTROPY);
SE(SE_RNG_RESEED_INTERVAL_REG_OFFSET) = 70001;
SE(SE_RNG_SRC_CONFIG_REG_OFFSET) = SE_RNG_SRC_CONFIG_ENT_SRC(RNG_SRC_RO_ENT_ENABLE) |
SE_RNG_SRC_CONFIG_ENT_SRC_LOCK(RNG_SRC_RO_ENT_LOCK_ENABLE);
SE(SE_BLOCK_COUNT_REG_OFFSET) = 0;
int res =_se_execute_oneshot(OP_START, output_buf, 0x10, NULL, 0);
free(output_buf);
if (res)
initialized = true;
return res;
}
int se_generate_random(void *dst, u32 size)
{
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_ALG(ALG_RNG) | SE_CONFIG_DST(DST_MEMORY);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_CORE_SEL(CORE_ENCRYPT) | SE_CRYPTO_INPUT_SEL(INPUT_RANDOM);
SE(SE_RNG_CONFIG_REG_OFFSET) = SE_RNG_CONFIG_MODE(RNG_MODE_NORMAL) | SE_RNG_CONFIG_SRC(RNG_SRC_ENTROPY);
u32 num_blocks = size >> 4;
u32 aligned_size = num_blocks << 4;
if (num_blocks)
{
SE(SE_BLOCK_COUNT_REG_OFFSET) = num_blocks - 1;
if (!_se_execute_oneshot(OP_START, dst, aligned_size, NULL, 0))
return 0;
}
if (size > aligned_size)
return _se_execute_one_block(OP_START, dst + aligned_size, size - aligned_size, NULL, 0);
return 1;
}
int se_generate_random_key(u32 ks_dst, u32 ks_src)
{
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_ALG(ALG_RNG) | SE_CONFIG_DST(DST_MEMORY);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(ks_src) | SE_CRYPTO_CORE_SEL(CORE_ENCRYPT) |
SE_CRYPTO_INPUT_SEL(INPUT_RANDOM);
SE(SE_RNG_CONFIG_REG_OFFSET) = SE_RNG_CONFIG_MODE(RNG_MODE_NORMAL) | SE_RNG_CONFIG_SRC(RNG_SRC_ENTROPY);
SE(SE_CRYPTO_KEYTABLE_DST_REG_OFFSET) = SE_CRYPTO_KEYTABLE_DST_KEY_INDEX(ks_dst);
if (!_se_execute_oneshot(OP_START, NULL, 0, NULL, 0))
return 0;
SE(SE_CRYPTO_KEYTABLE_DST_REG_OFFSET) = SE_CRYPTO_KEYTABLE_DST_KEY_INDEX(ks_dst) | 1;
if (!_se_execute_oneshot(OP_START, NULL, 0, NULL, 0))
return 0;
return 1;
}
int se_aes_xts_crypt_sec(u32 tweak_ks, u32 crypt_ks, u32 enc, u64 sec, void *dst, const void *src, u32 sec_size)
{
u8 tweak[0x10];
u8 orig_tweak[0x10];
u32 *pdst = (u32 *)dst;
u32 *psrc = (u32 *)src;
u32 *ptweak = (u32 *)tweak;
//Generate tweak.
for (int i = 0xF; i >= 0; i--)
{
tweak[i] = sec & 0xFF;
sec >>= 8;
}
if (!se_aes_crypt_block_ecb(tweak_ks, 1, tweak, tweak))
return 0;
memcpy(orig_tweak, tweak, 0x10);
// We are assuming a 0x10-aligned sector size in this implementation.
for (u32 i = 0; i < sec_size / 0x10; i++)
{
for (u32 j = 0; j < 4; j++)
pdst[j] = psrc[j] ^ ptweak[j];
_gf256_mul_x_le(tweak);
psrc += 4;
pdst += 4;
}
if (!se_aes_crypt_ecb(crypt_ks, enc, dst, sec_size, dst, sec_size))
return 0;
pdst = (u32 *)dst;
ptweak = (u32 *)orig_tweak;
for (u32 i = 0; i < sec_size / 0x10; i++)
{
for (u32 j = 0; j < 4; j++)
pdst[j] = pdst[j] ^ ptweak[j];
_gf256_mul_x_le(orig_tweak);
pdst += 4;
}
return 1;
}
int se_aes_xts_crypt(u32 tweak_ks, u32 crypt_ks, u32 enc, u64 sec, void *dst, const void *src, u32 sec_size, u32 num_secs)
{
u8 *pdst = (u8 *)dst;
u8 *psrc = (u8 *)src;
for (u32 i = 0; i < num_secs; i++)
if (!se_aes_xts_crypt_sec(tweak_ks, crypt_ks, enc, sec + i, pdst + sec_size * i, psrc + sec_size * i, sec_size))
return 0;
return 1;
}
// se_aes_cmac() was derived from Atmosphère's se_compute_aes_cmac
int se_aes_cmac(u32 ks, void *dst, u32 dst_size, const void *src, u32 src_size)
{
int res = 0;
u8 *key = (u8 *)calloc(0x10, 1);
u8 *last_block = (u8 *)calloc(0x10, 1);
// generate derived key
if (!se_aes_crypt_block_ecb(ks, 1, key, key))
goto out;
_gf256_mul_x(key);
if (src_size & 0xF)
_gf256_mul_x(key);
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_ALG(ALG_AES_ENC) | SE_CONFIG_DST(DST_HASHREG);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(ks) | SE_CRYPTO_INPUT_SEL(INPUT_AHB) |
SE_CRYPTO_XOR_POS(XOR_TOP) | SE_CRYPTO_VCTRAM_SEL(VCTRAM_AESOUT) | SE_CRYPTO_HASH(HASH_ENABLE) |
SE_CRYPTO_CORE_SEL(CORE_ENCRYPT);
se_aes_iv_clear(ks);
u32 num_blocks = (src_size + 0xf) >> 4;
if (num_blocks > 1)
{
SE(SE_BLOCK_COUNT_REG_OFFSET) = num_blocks - 2;
if (!_se_execute_oneshot(OP_START, NULL, 0, src, src_size))
goto out;
SE(SE_CRYPTO_REG_OFFSET) |= SE_CRYPTO_IV_SEL(IV_UPDATED);
}
if (src_size & 0xf)
{
memcpy(last_block, src + (src_size & ~0xf), src_size & 0xf);
last_block[src_size & 0xf] = 0x80;
}
else if (src_size >= 0x10)
{
memcpy(last_block, src + src_size - 0x10, 0x10);
}
for (u32 i = 0; i < 0x10; i++)
last_block[i] ^= key[i];
SE(SE_BLOCK_COUNT_REG_OFFSET) = 0;
res = _se_execute_oneshot(OP_START, NULL, 0, last_block, 0x10);
u32 *dst32 = (u32 *)dst;
for (u32 i = 0; i < (dst_size >> 2); i++)
dst32[i] = SE(SE_HASH_RESULT_REG_OFFSET + (i << 2));
out:;
free(key);
free(last_block);
return res;
}
int se_calc_sha256(void *hash, u32 *msg_left, const void *src, u32 src_size, u64 total_size, u32 sha_cfg, bool is_oneshot)
{
int res;
u32 hash32[TEGRA_SE_SHA_256_SIZE / 4];
//! TODO: src_size must be 512 bit aligned if continuing and not last block for SHA256.
if (src_size > 0xFFFFFF || !hash) // Max 16MB - 1 chunks and aligned x4 hash buffer.
return 0;
// Setup config for SHA256.
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_MODE(MODE_SHA256) | SE_CONFIG_ENC_ALG(ALG_SHA) | SE_CONFIG_DST(DST_HASHREG);
SE(SE_SHA_CONFIG_REG_OFFSET) = sha_cfg;
SE(SE_BLOCK_COUNT_REG_OFFSET) = 0;
// Set total size to current buffer size if empty.
if (!total_size)
total_size = src_size;
// Set total size: BITS(src_size), up to 2 EB.
SE(SE_SHA_MSG_LENGTH_0_REG_OFFSET) = (u32)(total_size << 3);
SE(SE_SHA_MSG_LENGTH_1_REG_OFFSET) = (u32)(total_size >> 29);
SE(SE_SHA_MSG_LENGTH_2_REG_OFFSET) = 0;
SE(SE_SHA_MSG_LENGTH_3_REG_OFFSET) = 0;
// Set size left to hash.
SE(SE_SHA_MSG_LEFT_0_REG_OFFSET) = (u32)(total_size << 3);
SE(SE_SHA_MSG_LEFT_1_REG_OFFSET) = (u32)(total_size >> 29);
SE(SE_SHA_MSG_LEFT_2_REG_OFFSET) = 0;
SE(SE_SHA_MSG_LEFT_3_REG_OFFSET) = 0;
// If we hash in chunks, copy over the intermediate.
if (sha_cfg == SHA_CONTINUE && msg_left)
{
// Restore message left to process.
SE(SE_SHA_MSG_LEFT_0_REG_OFFSET) = msg_left[0];
SE(SE_SHA_MSG_LEFT_1_REG_OFFSET) = msg_left[1];
// Restore hash reg.
memcpy(hash32, hash, TEGRA_SE_SHA_256_SIZE);
for (u32 i = 0; i < (TEGRA_SE_SHA_256_SIZE / 4); i++)
SE(SE_HASH_RESULT_REG_OFFSET + (i << 2)) = byte_swap_32(hash32[i]);
}
// Trigger the operation.
res = _se_execute(OP_START, NULL, 0, src, src_size, is_oneshot);
if (is_oneshot)
{
// Backup message left.
if (msg_left)
{
msg_left[0] = SE(SE_SHA_MSG_LEFT_0_REG_OFFSET);
msg_left[1] = SE(SE_SHA_MSG_LEFT_1_REG_OFFSET);
}
// Copy output hash.
for (u32 i = 0; i < (TEGRA_SE_SHA_256_SIZE / 4); i++)
hash32[i] = byte_swap_32(SE(SE_HASH_RESULT_REG_OFFSET + (i << 2)));
memcpy(hash, hash32, TEGRA_SE_SHA_256_SIZE);
}
return res;
}
int se_calc_sha256_oneshot(void *hash, const void *src, u32 src_size)
{
return se_calc_sha256(hash, NULL, src, src_size, 0, SHA_INIT_HASH, true);
}
int se_calc_sha256_finalize(void *hash, u32 *msg_left)
{
u32 hash32[TEGRA_SE_SHA_256_SIZE / 4];
int res = _se_execute_finalize();
// Backup message left.
if (msg_left)
{
msg_left[0] = SE(SE_SHA_MSG_LEFT_0_REG_OFFSET);
msg_left[1] = SE(SE_SHA_MSG_LEFT_1_REG_OFFSET);
}
// Copy output hash.
for (u32 i = 0; i < (TEGRA_SE_SHA_256_SIZE / 4); i++)
hash32[i] = byte_swap_32(SE(SE_HASH_RESULT_REG_OFFSET + (i << 2)));
memcpy(hash, hash32, TEGRA_SE_SHA_256_SIZE);
return res;
}
int se_calc_hmac_sha256(void *dst, const void *src, u32 src_size, const void *key, u32 key_size)
{
int res = 0;
u8 *secret = (u8 *)malloc(0x40);
u8 *ipad = (u8 *)malloc(0x40 + src_size);
u8 *opad = (u8 *)malloc(0x60);
if (key_size > 0x40)
{
if (!se_calc_sha256_oneshot(secret, key, key_size))
goto out;
memset(secret + 0x20, 0, 0x20);
}
else
{
memcpy(secret, key, key_size);
memset(secret + key_size, 0, 0x40 - key_size);
}
u32 *secret32 = (u32 *)secret;
u32 *ipad32 = (u32 *)ipad;
u32 *opad32 = (u32 *)opad;
for (u32 i = 0; i < 0x10; i++)
{
ipad32[i] = secret32[i] ^ 0x36363636;
opad32[i] = secret32[i] ^ 0x5C5C5C5C;
}
memcpy(ipad + 0x40, src, src_size);
if (!se_calc_sha256_oneshot(dst, ipad, 0x40 + src_size))
goto out;
memcpy(opad + 0x40, dst, 0x20);
if (!se_calc_sha256_oneshot(dst, opad, 0x60))
goto out;
res = 1;
out:;
free(secret);
free(ipad);
free(opad);
return res;
}
// _mgf1_xor() and rsa_oaep_decode were derived from Atmosphère
static void _mgf1_xor(void *masked, u32 masked_size, const void *seed, u32 seed_size)
{
u8 cur_hash[0x20] __attribute__((aligned(4)));
u8 hash_buf[0xe4] __attribute__((aligned(4)));
u32 hash_buf_size = seed_size + 4;
memcpy(hash_buf, seed, seed_size);
u32 round_num = 0;
u8 *p_out = (u8 *)masked;
while (masked_size) {
u32 cur_size = MIN(masked_size, 0x20);
for (u32 i = 0; i < 4; i++)
hash_buf[seed_size + 3 - i] = (round_num >> (8 * i)) & 0xff;
round_num++;
se_calc_sha256_oneshot(cur_hash, hash_buf, hash_buf_size);
for (unsigned int i = 0; i < cur_size; i++) {
*p_out ^= cur_hash[i];
p_out++;
}
masked_size -= cur_size;
}
}
u32 se_rsa_oaep_decode(void *dst, u32 dst_size, const void *label_digest, u32 label_digest_size, u8 *buf, u32 buf_size)
{
if (dst_size <= 0 || buf_size < 0x43 || label_digest_size != 0x20)
return 0;
bool is_valid = buf[0] == 0;
u32 db_len = buf_size - 0x21;
u8 *seed = buf + 1;
u8 *db = seed + 0x20;
_mgf1_xor(seed, 0x20, db, db_len);
_mgf1_xor(db, db_len, seed, 0x20);
is_valid &= memcmp(label_digest, db, 0x20) ? 0 : 1;
db += 0x20;
db_len -= 0x20;
int msg_ofs = 0;
int looking_for_one = 1;
int invalid_db_padding = 0;
int is_zero;
int is_one;
for (int i = 0; i < db_len; )
{
is_zero = (db[i] == 0);
is_one = (db[i] == 1);
msg_ofs += (looking_for_one & is_one) * (++i);
looking_for_one &= ~is_one;
invalid_db_padding |= (looking_for_one & ~is_zero);
}
is_valid &= (invalid_db_padding == 0);
const u32 msg_size = MIN(dst_size, is_valid * (db_len - msg_ofs));
memcpy(dst, db + msg_ofs, msg_size);
return msg_size;
}
void se_get_aes_keys(u8 *buf, u8 *keys, u32 keysize)
{
u8 *aligned_buf = (u8 *)ALIGN((u32)buf, 0x40);
// Set Secure Random Key.
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_MODE(MODE_KEY128) | SE_CONFIG_ENC_ALG(ALG_RNG) | SE_CONFIG_DST(DST_SRK);
SE(SE_CRYPTO_REG_OFFSET) = SE_CRYPTO_KEY_INDEX(0) | SE_CRYPTO_CORE_SEL(CORE_ENCRYPT) | SE_CRYPTO_INPUT_SEL(INPUT_RANDOM);
SE(SE_RNG_CONFIG_REG_OFFSET) = SE_RNG_CONFIG_SRC(RNG_SRC_ENTROPY) | SE_RNG_CONFIG_MODE(RNG_MODE_FORCE_RESEED);
SE(SE_CRYPTO_LAST_BLOCK) = 0;
_se_execute_oneshot(OP_START, NULL, 0, NULL, 0);
// Save AES keys.
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_MODE(MODE_KEY128) | SE_CONFIG_ENC_ALG(ALG_AES_ENC) | SE_CONFIG_DST(DST_MEMORY);
for (u32 i = 0; i < TEGRA_SE_KEYSLOT_COUNT; i++)
{
SE(SE_CONTEXT_SAVE_CONFIG_REG_OFFSET) = SE_CONTEXT_SAVE_SRC(AES_KEYTABLE) |
(i << SE_KEY_INDEX_SHIFT) | SE_CONTEXT_SAVE_WORD_QUAD(KEYS_0_3);
SE(SE_CRYPTO_LAST_BLOCK) = 0;
_se_execute_oneshot(OP_CTX_SAVE, aligned_buf, 0x10, NULL, 0);
memcpy(keys + i * keysize, aligned_buf, 0x10);
if (keysize > 0x10)
{
SE(SE_CONTEXT_SAVE_CONFIG_REG_OFFSET) = SE_CONTEXT_SAVE_SRC(AES_KEYTABLE) |
(i << SE_KEY_INDEX_SHIFT) | SE_CONTEXT_SAVE_WORD_QUAD(KEYS_4_7);
SE(SE_CRYPTO_LAST_BLOCK) = 0;
_se_execute_oneshot(OP_CTX_SAVE, aligned_buf, 0x10, NULL, 0);
memcpy(keys + i * keysize + 0x10, aligned_buf, 0x10);
}
}
// Save SRK to PMC secure scratches.
SE(SE_CONTEXT_SAVE_CONFIG_REG_OFFSET) = SE_CONTEXT_SAVE_SRC(SRK);
SE(SE_CRYPTO_LAST_BLOCK) = 0;
_se_execute_oneshot(OP_CTX_SAVE, NULL, 0, NULL, 0);
// End context save.
SE(SE_CONFIG_REG_OFFSET) = 0;
_se_execute_oneshot(OP_CTX_SAVE, NULL, 0, NULL, 0);
// Get SRK.
u32 srk[4];
srk[0] = PMC(APBDEV_PMC_SECURE_SCRATCH4);
srk[1] = PMC(APBDEV_PMC_SECURE_SCRATCH5);
srk[2] = PMC(APBDEV_PMC_SECURE_SCRATCH6);
srk[3] = PMC(APBDEV_PMC_SECURE_SCRATCH7);
// Decrypt context.
se_aes_key_clear(3);
se_aes_key_set(3, srk, 0x10);
se_aes_crypt_cbc(3, 0, keys, TEGRA_SE_KEYSLOT_COUNT * keysize, keys, TEGRA_SE_KEYSLOT_COUNT * keysize);
se_aes_key_clear(3);
}
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