mirror of
https://github.com/Scandal-UK/Incognito_RCM.git
synced 2024-11-22 03:46:39 +00:00
commit
360266bd31
3 changed files with 51 additions and 48 deletions
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@ -355,9 +355,12 @@ bool dump_keys()
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emummc_storage_set_mmc_partition(&storage, EMMC_GPP);
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// Parse eMMC GPT.
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LIST_INIT(gpt);
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nx_emmc_gpt_parse(&gpt, &storage);
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se_aes_key_set(8, bis_key[0] + 0x00, 0x10);
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se_aes_key_set(9, bis_key[0] + 0x10, 0x10);
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// Find PRODINFO partition.
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prodinfo_part = nx_emmc_part_find(&gpt, "PRODINFO");
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if (!prodinfo_part)
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@ -366,10 +369,8 @@ bool dump_keys()
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return false;
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}
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se_aes_key_set(8, bis_key[0] + 0x00, 0x10);
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se_aes_key_set(9, bis_key[0] + 0x10, 0x10);
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gfx_printf("%kGot keys!\n%kValidate...", COLOR_GREEN, COLOR_YELLOW);
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const char magic[4] = "CAL0";
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char buffer[4];
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readData((u8 *)buffer, 0, 4, NULL);
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@ -26,56 +26,56 @@ static inline void _gf256_mul_x_le(void *block)
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pdata[0x0] ^= 0x87;
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}
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static int _nx_aes_xts_crypt_sec(u32 tweak_ks, u32 crypt_ks, u32 enc, u8 *tweak, bool regen_tweak, u32 tweak_exp, u32 sec, void *dst, const void *src, u32 sec_size)
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static inline int _emmc_xts(u32 ks1, u32 ks2, u32 enc, u8 *tweak, bool regen_tweak, u32 tweak_exp, u64 sec, void *dst, void *src, u32 secsize)
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{
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u32 *pdst = (u32 *)dst;
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u32 *psrc = (u32 *)src;
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u32 *ptweak = (u32 *)tweak;
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int res = 0;
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u8 *pdst = (u8 *)dst;
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u8 *psrc = (u8 *)src;
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if (regen_tweak)
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{
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for (int i = 0xF; i >= 0; i--)
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{
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tweak[i] = sec & 0xFF;
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sec >>= 8;
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}
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if (!se_aes_crypt_block_ecb(tweak_ks, 1, tweak, tweak))
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return 0;
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}
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if (regen_tweak)
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{
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for (int i = 0xF; i >= 0; i--)
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{
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tweak[i] = sec & 0xFF;
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sec >>= 8;
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}
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if (!se_aes_crypt_block_ecb(ks1, 1, tweak, tweak))
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goto out;
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}
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// tweak_exp allows us to use a saved tweak to reduce _gf256_mul_x_le calls.
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for (u32 i = 0; i < (tweak_exp << 5); i++)
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_gf256_mul_x_le(tweak);
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for (u32 i = 0; i < tweak_exp * 0x20; i++)
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_gf256_mul_x_le(tweak);
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u8 orig_tweak[0x10];
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memcpy(orig_tweak, tweak, 0x10);
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u8 temptweak[0x10];
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memcpy(temptweak, tweak, 0x10);
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// We are assuming a 0x10-aligned sector size in this implementation.
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for (u32 i = 0; i < (sec_size >> 4); i++)
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{
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for (u32 j = 0; j < 4; j++)
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pdst[j] = psrc[j] ^ ptweak[j];
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//We are assuming a 0x10-aligned sector size in this implementation.
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for (u32 i = 0; i < secsize / 0x10; i++)
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{
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for (u32 j = 0; j < 0x10; j++)
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pdst[j] = psrc[j] ^ tweak[j];
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_gf256_mul_x_le(tweak);
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psrc += 0x10;
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pdst += 0x10;
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}
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_gf256_mul_x_le(tweak);
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psrc += 4;
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pdst += 4;
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}
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se_aes_crypt_ecb(ks2, enc, dst, secsize, src, secsize);
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if (!se_aes_crypt_ecb(crypt_ks, enc, dst, sec_size, dst, sec_size))
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return 0;
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pdst = (u8 *)dst;
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pdst = (u32 *)dst;
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ptweak = (u32 *)orig_tweak;
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for (u32 i = 0; i < (sec_size >> 4); i++)
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{
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for (u32 j = 0; j < 4; j++)
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pdst[j] = pdst[j] ^ ptweak[j];
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memcpy(tweak, temptweak, 0x10);
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for (u32 i = 0; i < secsize / 0x10; i++)
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{
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for (u32 j = 0; j < 0x10; j++)
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pdst[j] = pdst[j] ^ tweak[j];
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_gf256_mul_x_le(tweak);
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pdst += 0x10;
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}
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_gf256_mul_x_le(orig_tweak);
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pdst += 4;
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}
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res = 1;
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return 1;
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out:;
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return res;
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}
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// replacement for nx_emmc_part_write in storage/nx_emmc, which uses sdmmc_storage_write
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@ -100,7 +100,7 @@ bool prodinfo_read(
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u32 tweak_exp = 0;
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bool regen_tweak = true;
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if (nx_emmc_part_read(&emmc_storage, prodinfo_part, sector, count, buff))
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if (nx_emmc_part_read(&storage, prodinfo_part, sector, count, buff))
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{
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if (prev_cluster != sector / 0x20)
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{ // sector in different cluster than last read
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@ -118,7 +118,7 @@ bool prodinfo_read(
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}
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// fatfs will never pull more than a cluster
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result = _nx_aes_xts_crypt_sec(9, 8, 0, tweak, regen_tweak, tweak_exp, prev_cluster, buff, buff, count * 0x200);
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result = _emmc_xts(9, 8, 0, tweak, regen_tweak, tweak_exp, prev_cluster, buff, buff, count * 0x200);
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prev_sector = sector + count - 1;
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return result;
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@ -155,10 +155,10 @@ bool prodinfo_write(
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}
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// fatfs will never pull more than a cluster
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if(!_nx_aes_xts_crypt_sec(9, 8, 1, tweak, regen_tweak, tweak_exp, prev_cluster, buff, buff, count * 0x200)){
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if(!_emmc_xts(9, 8, 1, tweak, regen_tweak, tweak_exp, prev_cluster, buff, buff, count * 0x200)){
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return false;
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}
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if (nx_emummc_part_write(&emmc_storage, prodinfo_part, sector, count, buff))
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if (nx_emummc_part_write(&storage, prodinfo_part, sector, count, buff))
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{
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prev_sector = sector + count - 1;
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return true;
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@ -390,6 +390,8 @@ out:
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void backup_sysnand()
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{
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gfx_printf("\n%kBacking-up sysnand", COLOR_YELLOW);
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h_cfg.emummc_force_disable = true;
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b_cfg.extra_cfg &= ~EXTRA_CFG_DUMP_EMUMMC;
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if (!dump_keys())
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