forked from Mirror/GodMode9
22 lines
818 B
C
22 lines
818 B
C
#include "exefs.h"
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#include "ncch.h"
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u32 ValidateExeFsHeader(ExeFsHeader* exefs, u32 size) {
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u8 zeroes[32] = { 0 };
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u32 data_size = 0;
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u32 n_files = 0;
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for (u32 i = 0; i < 10; i++) {
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ExeFsFileHeader* file = exefs->files + i;
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u8* hash = exefs->hashes[9 - i];
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if (file->size == 0) continue;
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if (file->offset % NCCH_MEDIA_UNIT) return 1; // not aligned to media unit, failed
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if (file->offset < data_size) return 1; // overlapping data, failed
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if (memcmp(hash, zeroes, 32) == 0) return 1; // hash not set, failed
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data_size = file->offset + align(file->size, NCCH_MEDIA_UNIT);
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n_files++;
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}
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if (size && (data_size > (size - sizeof(ExeFsHeader)))) // exefs header not included in table
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return 1;
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return (n_files) ? 0 : 1;
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}
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