mirror of
https://github.com/s1204IT/Lockpick_RCM.git
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96 lines
4 KiB
C
96 lines
4 KiB
C
/*
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* Copyright (c) 2022 shchmue
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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 "cal0_read.h"
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#include <gfx_utils.h>
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#include <sec/se.h>
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#include <sec/se_t210.h>
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#include "../storage/emummc.h"
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#include "../storage/nx_emmc.h"
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#include <utils/util.h>
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bool cal0_read(u32 tweak_ks, u32 crypt_ks, void *read_buffer) {
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nx_emmc_cal0_t *cal0 = (nx_emmc_cal0_t *)read_buffer;
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// Check if CAL0 was already read into this buffer
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if (cal0->magic == MAGIC_CAL0) {
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return true;
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}
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if (!emummc_storage_read(NX_EMMC_CALIBRATION_OFFSET / NX_EMMC_BLOCKSIZE, NX_EMMC_CALIBRATION_SIZE / NX_EMMC_BLOCKSIZE, read_buffer)) {
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EPRINTF("Unable to read PRODINFO.");
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return false;
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}
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se_aes_xts_crypt(tweak_ks, crypt_ks, DECRYPT, 0, read_buffer, read_buffer, XTS_CLUSTER_SIZE, NX_EMMC_CALIBRATION_SIZE / XTS_CLUSTER_SIZE);
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if (cal0->magic != MAGIC_CAL0) {
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EPRINTF("Invalid CAL0 magic. Check BIS key 0.");
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return false;
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}
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return true;
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}
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bool cal0_get_ssl_rsa_key(const nx_emmc_cal0_t *cal0, const void **out_key, u32 *out_key_size, const void **out_iv, u32 *out_generation) {
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const u32 ext_key_size = sizeof(cal0->ext_ssl_key_iv) + sizeof(cal0->ext_ssl_key);
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const u32 ext_key_crc_size = ext_key_size + sizeof(cal0->ext_ssl_key_ver) + sizeof(cal0->crc16_pad39);
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const u32 key_size = sizeof(cal0->ssl_key_iv) + sizeof(cal0->ssl_key);
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const u32 key_crc_size = key_size + sizeof(cal0->crc16_pad18);
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if (cal0->ext_ssl_key_crc == crc16_calc(cal0->ext_ssl_key_iv, ext_key_crc_size)) {
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*out_key = cal0->ext_ssl_key;
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*out_key_size = ext_key_size;
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*out_iv = cal0->ext_ssl_key_iv;
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// Settings sysmodule manually zeroes this out below cal version 9
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*out_generation = cal0->version <= 8 ? 0 : cal0->ext_ssl_key_ver;
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} else if (cal0->ssl_key_crc == crc16_calc(cal0->ssl_key_iv, key_crc_size)) {
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*out_key = cal0->ssl_key;
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*out_key_size = key_size;
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*out_iv = cal0->ssl_key_iv;
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*out_generation = 0;
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} else {
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EPRINTF("Crc16 error reading device key.");
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return false;
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}
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return true;
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}
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bool cal0_get_eticket_rsa_key(const nx_emmc_cal0_t *cal0, const void **out_key, u32 *out_key_size, const void **out_iv, u32 *out_generation) {
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const u32 ext_key_size = sizeof(cal0->ext_ecc_rsa2048_eticket_key_iv) + sizeof(cal0->ext_ecc_rsa2048_eticket_key);
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const u32 ext_key_crc_size = ext_key_size + sizeof(cal0->ext_ecc_rsa2048_eticket_key_ver) + sizeof(cal0->crc16_pad38);
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const u32 key_size = sizeof(cal0->rsa2048_eticket_key_iv) + sizeof(cal0->rsa2048_eticket_key);
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const u32 key_crc_size = key_size + sizeof(cal0->crc16_pad21);
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if (cal0->ext_ecc_rsa2048_eticket_key_crc == crc16_calc(cal0->ext_ecc_rsa2048_eticket_key_iv, ext_key_crc_size)) {
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*out_key = cal0->ext_ecc_rsa2048_eticket_key;
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*out_key_size = ext_key_size;
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*out_iv = cal0->ext_ecc_rsa2048_eticket_key_iv;
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// Settings sysmodule manually zeroes this out below cal version 9
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*out_generation = cal0->version <= 8 ? 0 : cal0->ext_ecc_rsa2048_eticket_key_ver;
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} else if (cal0->rsa2048_eticket_key_crc == crc16_calc(cal0->rsa2048_eticket_key_iv, key_crc_size)) {
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*out_key = cal0->rsa2048_eticket_key;
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*out_key_size = key_size;
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*out_iv = cal0->rsa2048_eticket_key_iv;
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*out_generation = 0;
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} else {
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EPRINTF("Crc16 error reading device key.");
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return false;
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}
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return true;
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}
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