mirror of
https://github.com/CTCaer/hekate.git
synced 2024-11-30 05:22:05 +00:00
226 lines
6.6 KiB
C
226 lines
6.6 KiB
C
/*
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* Copyright (c) 2018 naehrwert
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* Copyright (c) 2018-2021 CTCaer
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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 <string.h>
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#include <bdk.h>
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#include "pkg2.h"
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#include "hos.h"
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#include "../config.h"
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#include <libs/fatfs/ff.h>
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#include <libs/compr/blz.h>
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extern hekate_config h_cfg;
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extern const u8 package2_keyseed[];
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u32 pkg2_newkern_ini1_val;
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u32 pkg2_newkern_ini1_start;
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u32 pkg2_newkern_ini1_end;
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/*#define DPRINTF(...) gfx_printf(__VA_ARGS__)
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#define DEBUG_PRINTING*/
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#define DPRINTF(...)
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u32 pkg2_calc_kip1_size(pkg2_kip1_t *kip1)
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{
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u32 size = sizeof(pkg2_kip1_t);
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for (u32 j = 0; j < KIP1_NUM_SECTIONS; j++)
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size += kip1->sections[j].size_comp;
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return size;
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}
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void pkg2_get_newkern_info(u8 *kern_data)
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{
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u32 pkg2_newkern_ini1_off = 0;
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pkg2_newkern_ini1_start = 0;
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// Find static OP offset that is close to INI1 offset.
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u32 counter_ops = 0x100;
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while (counter_ops)
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{
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if (*(u32 *)(kern_data + 0x100 - counter_ops) == PKG2_NEWKERN_GET_INI1_HEURISTIC)
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{
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pkg2_newkern_ini1_off = 0x100 - counter_ops + 12; // OP found. Add 12 for the INI1 offset.
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break;
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}
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counter_ops -= 4;
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}
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// Offset not found?
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if (!counter_ops)
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return;
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u32 info_op = *(u32 *)(kern_data + pkg2_newkern_ini1_off);
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pkg2_newkern_ini1_val = ((info_op & 0xFFFF) >> 3) + pkg2_newkern_ini1_off; // Parse ADR and PC.
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pkg2_newkern_ini1_start = *(u32 *)(kern_data + pkg2_newkern_ini1_val);
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pkg2_newkern_ini1_end = *(u32 *)(kern_data + pkg2_newkern_ini1_val + 0x8);
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}
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bool pkg2_parse_kips(link_t *info, pkg2_hdr_t *pkg2, bool *new_pkg2)
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{
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u8 *ptr;
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// Check for new pkg2 type.
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if (!pkg2->sec_size[PKG2_SEC_INI1])
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{
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pkg2_get_newkern_info(pkg2->data);
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if (!pkg2_newkern_ini1_start)
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return false;
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ptr = pkg2->data + pkg2_newkern_ini1_start;
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*new_pkg2 = true;
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}
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else
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ptr = pkg2->data + pkg2->sec_size[PKG2_SEC_KERNEL];
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pkg2_ini1_t *ini1 = (pkg2_ini1_t *)ptr;
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ptr += sizeof(pkg2_ini1_t);
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for (u32 i = 0; i < ini1->num_procs; i++)
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{
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pkg2_kip1_t *kip1 = (pkg2_kip1_t *)ptr;
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pkg2_kip1_info_t *ki = (pkg2_kip1_info_t *)malloc(sizeof(pkg2_kip1_info_t));
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ki->kip1 = kip1;
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ki->size = pkg2_calc_kip1_size(kip1);
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list_append(info, &ki->link);
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ptr += ki->size;
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DPRINTF(" kip1 %d:%s @ %08X (%08X)\n", i, kip1->name, (u32)kip1, ki->size);
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}
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return true;
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}
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//!TODO: Update on mkey changes.
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static const u8 mkey_vector_7xx[][SE_KEY_128_SIZE] =
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{
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// Master key 7 encrypted with 8. (7.0.0 with 8.1.0)
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{ 0xEA, 0x60, 0xB3, 0xEA, 0xCE, 0x8F, 0x24, 0x46, 0x7D, 0x33, 0x9C, 0xD1, 0xBC, 0x24, 0x98, 0x29 },
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// Master key 8 encrypted with 9. (8.1.0 with 9.0.0)
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{ 0x4D, 0xD9, 0x98, 0x42, 0x45, 0x0D, 0xB1, 0x3C, 0x52, 0x0C, 0x9A, 0x44, 0xBB, 0xAD, 0xAF, 0x80 },
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// Master key 9 encrypted with 10. (9.0.0 with 9.1.0)
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{ 0xB8, 0x96, 0x9E, 0x4A, 0x00, 0x0D, 0xD6, 0x28, 0xB3, 0xD1, 0xDB, 0x68, 0x5F, 0xFB, 0xE1, 0x2A },
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// Master key 10 encrypted with 11. (9.1.0 with 12.1.0)
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{ 0xC1, 0x8D, 0x16, 0xBB, 0x2A, 0xE4, 0x1D, 0xD4, 0xC2, 0xC1, 0xB6, 0x40, 0x94, 0x35, 0x63, 0x98 },
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// Master key 11 encrypted with 12. (12.1.0 with 13.0.0)
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{ 0xA3, 0x24, 0x65, 0x75, 0xEA, 0xCC, 0x6E, 0x8D, 0xFB, 0x5A, 0x16, 0x50, 0x74, 0xD2, 0x15, 0x06 },
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// Master key 12 encrypted with 13. (13.0.0 with 14.0.0)
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{ 0x83, 0x67, 0xAF, 0x01, 0xCF, 0x93, 0xA1, 0xAB, 0x80, 0x45, 0xF7, 0x3F, 0x72, 0xFD, 0x3B, 0x38 },
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// Master key 13 encrypted with 14. (14.0.0 with 15.0.0)
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{ 0xB1, 0x81, 0xA6, 0x0D, 0x72, 0xC7, 0xEE, 0x15, 0x21, 0xF3, 0xC0, 0xB5, 0x6B, 0x61, 0x6D, 0xE7 },
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};
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static bool _pkg2_key_unwrap_validate(pkg2_hdr_t *tmp_test, pkg2_hdr_t *hdr, u8 src_slot, u8 *mkey, const u8 *key_seed)
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{
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// Decrypt older encrypted mkey.
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se_aes_crypt_ecb(src_slot, DECRYPT, mkey, SE_KEY_128_SIZE, key_seed, SE_KEY_128_SIZE);
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// Set and unwrap pkg2 key.
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se_aes_key_set(9, mkey, SE_KEY_128_SIZE);
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se_aes_unwrap_key(9, 9, package2_keyseed);
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// Decrypt header.
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se_aes_crypt_ctr(9, tmp_test, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
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// Return if header is valid.
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return (tmp_test->magic == PKG2_MAGIC);
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}
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pkg2_hdr_t *pkg2_decrypt(void *data, u8 kb)
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{
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pkg2_hdr_t mkey_test;
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u8 *pdata = (u8 *)data;
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u8 pkg2_keyslot = 8;
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// Skip signature.
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pdata += 0x100;
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pkg2_hdr_t *hdr = (pkg2_hdr_t *)pdata;
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// Skip header.
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pdata += sizeof(pkg2_hdr_t);
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// Check if we need to decrypt with newer mkeys. Valid for THK for 7.0.0 and up.
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se_aes_crypt_ctr(8, &mkey_test, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
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if (mkey_test.magic == PKG2_MAGIC)
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goto key_found;
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// Decrypt older pkg2 via new mkeys.
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if ((kb >= KB_FIRMWARE_VERSION_700) && (kb < KB_FIRMWARE_VERSION_MAX))
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{
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u8 tmp_mkey[SE_KEY_128_SIZE];
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u8 decr_slot = 7; // THK mkey or T210B01 mkey.
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u8 mkey_seeds_cnt = sizeof(mkey_vector_7xx) / SE_KEY_128_SIZE;
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u8 mkey_seeds_idx = mkey_seeds_cnt; // Real index + 1.
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u8 mkey_seeds_min_idx = mkey_seeds_cnt - (KB_FIRMWARE_VERSION_MAX - kb);
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while (mkey_seeds_cnt)
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{
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// Decrypt and validate mkey.
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int res = _pkg2_key_unwrap_validate(&mkey_test, hdr, decr_slot,
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tmp_mkey, mkey_vector_7xx[mkey_seeds_idx - 1]);
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if (res)
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{
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pkg2_keyslot = 9;
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goto key_found;
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}
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else
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{
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// Set current mkey in order to decrypt a lower mkey.
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mkey_seeds_idx--;
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se_aes_key_set(9, tmp_mkey, SE_KEY_128_SIZE);
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decr_slot = 9; // Temp key.
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// Check if we tried last key for that pkg2 version.
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// And start with a lower mkey in case mkey is older.
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if (mkey_seeds_idx == mkey_seeds_min_idx)
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{
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mkey_seeds_cnt--;
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mkey_seeds_idx = mkey_seeds_cnt;
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decr_slot = 7; // THK mkey or T210B01 mkey.
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}
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}
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}
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}
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key_found:
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// Decrypt header.
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se_aes_crypt_ctr(pkg2_keyslot, hdr, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
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//gfx_hexdump((u32)hdr, hdr, 0x100);
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if (hdr->magic != PKG2_MAGIC)
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return NULL;
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for (u32 i = 0; i < 4; i++)
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{
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DPRINTF("sec %d has size %08X\n", i, hdr->sec_size[i]);
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if (!hdr->sec_size[i])
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continue;
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se_aes_crypt_ctr(pkg2_keyslot, pdata, hdr->sec_size[i], pdata, hdr->sec_size[i], &hdr->sec_ctr[i * SE_AES_IV_SIZE]);
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//gfx_hexdump((u32)pdata, pdata, 0x100);
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pdata += hdr->sec_size[i];
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}
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return hdr;
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}
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