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https://github.com/Decscots/Lockpick_RCM.git
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diskio: Improve emmc xts, double sector cache
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@ -40,14 +40,14 @@ extern emmc_part_t *system_part;
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typedef struct {
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u32 sector;
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u32 visit_count;
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u8 align[8];
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u8 tweak[0x10];
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u8 cached_sector[0x200];
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u8 align[8];
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} sector_cache_t;
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#define MAX_SEC_CACHE_ENTRIES 64
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#define MAX_SEC_CACHE_ENTRIES 128
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static sector_cache_t *sector_cache = NULL;
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static u32 secindex = 0;
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u32 secindex = 0;
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bool clear_sector_cache = false;
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DSTATUS disk_status (
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@ -80,8 +80,10 @@ static inline void _gf256_mul_x_le(void *block) {
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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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int res = 0;
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u8 *pdst = (u8 *)dst;
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u8 *psrc = (u8 *)src;
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u8 *temptweak = (u8 *)malloc(0x10);
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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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if (regen_tweak) {
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for (int i = 0xF; i >= 0; i--) {
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@ -95,34 +97,33 @@ static inline int _emmc_xts(u32 ks1, u32 ks2, u32 enc, u8 *tweak, bool regen_twe
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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 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 < secsize / 0x10; i++) {
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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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for (u32 j = 0; j < 4; j++)
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pdst[j] = psrc[j] ^ ptweak[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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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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se_aes_crypt_ecb(ks2, enc, dst, secsize, dst, secsize);
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pdst = (u8 *)dst;
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pdst = (u32 *)dst;
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memcpy(tweak, temptweak, 0x10);
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for (u32 i = 0; i < secsize / 0x10; i++) {
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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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for (u32 j = 0; j < 4; j++)
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pdst[j] = pdst[j] ^ ptweak[j];
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_gf256_mul_x_le(tweak);
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pdst += 0x10;
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pdst += 4;
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}
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res = 1;
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out:;
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free(temptweak);
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return res;
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}
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