mirror of
https://github.com/Atmosphere-NX/Atmosphere
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80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include "key_derivation.h"
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#include "se.h"
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#include "fuse.h"
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#include "utils.h"
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#define AL16 ALIGN(16)
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static const uint8_t AL16 keyblob_seed_00[0x10] = {
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0xDF, 0x20, 0x6F, 0x59, 0x44, 0x54, 0xEF, 0xDC, 0x70, 0x74, 0x48, 0x3B, 0x0D, 0xED, 0x9F, 0xD3
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};
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static const uint8_t AL16 masterkey_seed[0x10] = {
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0xD8, 0xA2, 0x41, 0x0A, 0xC6, 0xC5, 0x90, 0x01, 0xC6, 0x1D, 0x6A, 0x26, 0x7C, 0x51, 0x3F, 0x3C
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};
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static const uint8_t AL16 devicekey_seed[0x10] = {
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0x4F, 0x02, 0x5F, 0x0E, 0xB6, 0x6D, 0x11, 0x0E, 0xDC, 0x32, 0x7D, 0x41, 0x86, 0xC2, 0xF4, 0x78
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};
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static const uint8_t AL16 devicekey_4x_seed[0x10] = {
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0x0C, 0x91, 0x09, 0xDB, 0x93, 0x93, 0x07, 0x81, 0x07, 0x3C, 0xC4, 0x16, 0x22, 0x7C, 0x6C, 0x28
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};
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static const uint8_t AL16 masterkey_4x_seed[0x10] = {
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0x2D, 0xC1, 0xF4, 0x8D, 0xF3, 0x5B, 0x69, 0x33, 0x42, 0x10, 0xAC, 0x65, 0xDA, 0x90, 0x46, 0x66
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};
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static const uint8_t AL16 new_master_kek_seed_7x[0x10] = {
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0x9A, 0x3E, 0xA9, 0xAB, 0xFD, 0x56, 0x46, 0x1C, 0x9B, 0xF6, 0x48, 0x7F, 0x5C, 0xFA, 0x09, 0x5C
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};
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void derive_7x_keys(const void *tsec_key, void *tsec_root_key) {
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uint8_t AL16 work_buffer[0x10];
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/* Set keyslot flags properly in preparation of derivation. */
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set_aes_keyslot_flags(0xE, 0x15);
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set_aes_keyslot_flags(0xD, 0x15);
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/* Set the TSEC key. */
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set_aes_keyslot(0xD, tsec_key, 0x10);
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/* Derive keyblob key 0. */
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se_aes_ecb_decrypt_block(0xD, work_buffer, 0x10, keyblob_seed_00, 0x10);
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decrypt_data_into_keyslot(0xF, 0xE, work_buffer, 0x10);
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/* Clear the SBK. */
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clear_aes_keyslot(0xE);
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/* Derive the master kek. */
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set_aes_keyslot(0xC, tsec_root_key, 0x10);
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decrypt_data_into_keyslot(0xC, 0xC, new_master_kek_seed_7x, 0x10);
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/* Derive keys for exosphere. */
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decrypt_data_into_keyslot(0xA, 0xF, devicekey_4x_seed, 0x10);
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decrypt_data_into_keyslot(0xF, 0xF, devicekey_seed, 0x10);
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decrypt_data_into_keyslot(0xE, 0xC, masterkey_4x_seed, 0x10);
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decrypt_data_into_keyslot(0xC, 0xC, masterkey_seed, 0x10);
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/* Clear master kek from memory. */
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for (size_t i = 0; i < sizeof(work_buffer); i++) {
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work_buffer[i] = 0xCC;
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}
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}
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