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Make Backup verifying faster by using SE's SHA256

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Kostas Missos
2018-06-26 19:07:34 +03:00
parent 3f18713f53
commit 37a15ca8ff
2 changed files with 46 additions and 8 deletions
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29
ipl/se.c
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@@ -1,5 +1,7 @@
/*
* Copyright (c) 2018 naehrwert
* Copyright (c) 2018 CTCaer
* Copyright (c) 2018 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -19,6 +21,7 @@
#include "heap.h"
#include "t210.h"
#include "se_t210.h"
#include "util.h"
typedef struct _se_ll_t
{
@@ -254,3 +257,29 @@ int se_aes_xts_crypt(u32 ks1, u32 ks2, u32 enc, u64 sec, void *dst, void *src, u
return 1;
}
// se_calc_sha256() was derived from Atmosphère's se_calculate_sha256.
int se_calc_sha256(void *dst, const void *src, u32 src_size) {
int res;
// Setup config for SHA256, size = BITS(src_size).
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_MODE(MODE_SHA256) | SE_CONFIG_ENC_ALG(ALG_SHA) | SE_CONFIG_DST(DST_HASHREG);
SE(SE_SHA_CONFIG_REG_OFFSET) = 1;
SE(SE_SHA_MSG_LENGTH_REG_OFFSET) = (u32)(src_size << 3);
SE(0x208) = 0;
SE(0x20C) = 0;
SE(0x210) = 0;
SE(SE_SHA_MSG_LEFT_REG_OFFSET) = (u32)(src_size << 3);
SE(0x218) = 0;
SE(0x21C) = 0;
SE(0x220) = 0;
// Trigger the operation.
res = _se_execute(OP_START, NULL, 0, src, src_size);
// Copy output hash.
u32 *dst32 = (u32 *)dst;
for (u32 i = 0; i < 8; i++)
dst32[i] = byte_swap_32(SE(SE_HASH_RESULT_REG_OFFSET + (i << 2)));
return res;
}