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Process full media units in ExeFS

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d0k3 2017-05-03 01:15:47 +02:00
parent fe19600828
commit 96d70aaa01
2 changed files with 4 additions and 2 deletions
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4
source/game/exefs.c
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@ -1,4 +1,5 @@
#include "exefs.h"
#include "ncch.h"
u32 ValidateExeFsHeader(ExeFsHeader* exefs, u32 size) {
u8 zeroes[32] = { 0 };
@ -8,9 +9,10 @@ u32 ValidateExeFsHeader(ExeFsHeader* exefs, u32 size) {
ExeFsFileHeader* file = exefs->files + i;
u8* hash = exefs->hashes[9 - i];
if (file->size == 0) continue;
if (file->offset % NCCH_MEDIA_UNIT) return 1; // not aligned to media unit, failed
if (file->offset < data_size) return 1; // overlapping data, failed
if (memcmp(hash, zeroes, 32) == 0) return 1; // hash not set, failed
data_size = file->offset + file->size;
data_size = file->offset + align(file->size, NCCH_MEDIA_UNIT);
n_files++;
}
if (size && (data_size > (size - sizeof(ExeFsHeader)))) // exefs header not included in table

2
source/game/ncch.c
View File

@ -284,7 +284,7 @@ u32 CryptNcch(u8* data, u32 offset, u32 size, NcchHeader* ncch, ExeFsHeader* exe
ExeFsFileHeader* file = exefs->files + i;
if (CryptNcchSection(data, offset, size,
(ncch->offset_exefs * NCCH_MEDIA_UNIT) + 0x200 + file->offset,
file->size, 0x200 + file->offset,
align(file->size, NCCH_MEDIA_UNIT), 0x200 + file->offset,
ncch, 2, crypt_to, EXEFS_KEYID(file->name)) != 0) return 1;
}
}