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https://github.com/Scandal-UK/Incognito_RCM.git
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test aes_xts decryption with supplied functions
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parent
4db2070b14
commit
e22b5d3d3d
3 changed files with 102 additions and 2 deletions
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@ -44,6 +44,7 @@
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#include "key_sources.inl"
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#include "ccrypto.h"
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#include "../libs/fatfs/diskio.h"
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#include <string.h>
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extern bool sd_mount();
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@ -364,6 +365,36 @@ get_tsec: ;
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gfx_hexdump(0, tmp, NX_EMMC_BLOCKSIZE);
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DRESULT read_res;
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read_res = disk_read_mod (tmp, 0, 1, &storage, pkg2_part, 9);
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switch (read_res)
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{
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case RES_OK:
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WPRINTF("Successful!");
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break; /* 0: Successful */
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case RES_ERROR:
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WPRINTF("R/W Error!");
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break; /* 1: R/W Error */
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case RES_WRPRT:
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WPRINTF("Write Protected!");
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break; /* 2: Write Protected */
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case RES_NOTRDY:
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WPRINTF("Not Ready!");
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break; /* 3: Not Ready */
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case RES_PARERR:
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WPRINTF("Invalid Parameter!");
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break; /* 4: Invalid Parameter */
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default:
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WPRINTF("No Idea!");
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break;
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}
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gfx_hexdump(0, tmp, NX_EMMC_BLOCKSIZE);
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free(tmp);
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goto pkg2_done;
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@ -27,8 +27,7 @@
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#include "diskio.h" /* FatFs lower layer API */
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#include "../../mem/heap.h"
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#include "../../sec/se.h"
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#include "../../storage/nx_emmc.h"
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#include "../../storage/sdmmc.h"
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#define SDMMC_UPPER_BUFFER 0xB8000000
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#define DRAM_START 0x80000000
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@ -125,6 +124,73 @@ out:;
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return res;
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}
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DRESULT disk_read_mod (
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Start sector in LBA */
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UINT count, /* Number of sectors to read */
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sdmmc_storage_t *storage,
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emmc_part_t *partition,
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u32 hiKey
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)
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{
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__attribute__ ((aligned (16))) static u8 tweak[0x10];
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__attribute__ ((aligned (16))) static u64 prev_cluster = -1;
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__attribute__ ((aligned (16))) static u32 prev_sector = 0;
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u32 tweak_exp = 0;
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bool regen_tweak = true, cache_sector = false;
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u32 s = 0;
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if (count == 1) {
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for ( ; s < secindex; s++) {
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if (sector_cache[s].sector == sector) {
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sector_cache[s].visit_count++;
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memcpy(buff, sector_cache[s].cached_sector, 0x200);
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memcpy(tweak, sector_cache[s].tweak, 0x10);
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prev_sector = sector;
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prev_cluster = sector / 0x20;
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return RES_OK;
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}
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}
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// add to cache
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if (s == secindex && s < MAX_SEC_CACHE_ENTRIES) {
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sector_cache[s].sector = sector;
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sector_cache[s].visit_count++;
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cache_sector = true;
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secindex++;
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}
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}
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if (nx_emmc_part_read(storage, partition, sector, count, buff)) {
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if (prev_cluster != sector / 0x20) { // sector in different cluster than last read
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prev_cluster = sector / 0x20;
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tweak_exp = sector % 0x20;
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} else if (sector > prev_sector) { // sector in same cluster and past last sector
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tweak_exp = sector - prev_sector - 1;
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regen_tweak = false;
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} else { // sector in same cluster and before or same as last sector
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tweak_exp = sector % 0x20;
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}
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// fatfs will never pull more than a cluster
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_emmc_xts(hiKey, hiKey - 1, 0, tweak, regen_tweak, tweak_exp, prev_cluster, buff, buff, count * 0x200);
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if (cache_sector) {
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memcpy(sector_cache[s].cached_sector, buff, 0x200);
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memcpy(sector_cache[s].tweak, tweak, 0x10);
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}
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prev_sector = sector + count - 1;
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return RES_OK;
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}
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return RES_ERROR;
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}
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DRESULT disk_read (
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BYTE pdrv, /* Physical drive number to identify the drive */
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BYTE *buff, /* Data buffer to store read data */
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@ -10,6 +10,8 @@ extern "C" {
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#endif
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#include "../../utils/types.h"
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#include "../../storage/sdmmc.h"
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#include "../../storage/nx_emmc.h"
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/* Status of Disk Functions */
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typedef BYTE DSTATUS;
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@ -31,6 +33,7 @@ typedef enum {
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DSTATUS disk_initialize (BYTE pdrv);
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DSTATUS disk_status (BYTE pdrv);
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DRESULT disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count);
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DRESULT disk_read_mod (BYTE *buff, DWORD sector, UINT count, sdmmc_storage_t *storage, emmc_part_t *partition, u32 hiKey);
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DRESULT disk_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count);
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DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
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