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Track only LFH offsets and init zip struct

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This commit is contained in:
atxr 2024-02-21 17:08:57 +01:00
parent 812ff2fe3e
commit 090e17b3d9
5 changed files with 70 additions and 59 deletions
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16
libmineziper/src/libmineziper.c
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@ -1,5 +1,7 @@
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libmineziper.h"
@ -12,9 +14,10 @@ int get_uncompressed_size(zip* in)
{
int size = 0;
for (int i = 0; i < in->eocd->number_of_entries; i++)
for (int i = 0; i < in->entries; i++)
{
size += in->cdh[i]->uncompressed_size; // TODO overflow
LFH* lfh = &in->start[in->lfh_off[i]];
size += lfh->uncompressed_size;
}
return size;
@ -22,13 +25,11 @@ int get_uncompressed_size(zip* in)
bool scan_zip(char* zip_data, int zip_size)
{
zip zip;
get_eocd(zip_data, zip_size, &zip);
get_cdh(zip_data, &zip);
zip zip = init_zip(zip_data, zip_size);
for (int i = 0; i < zip.entries; i++)
{
LFH* lfh = &zip_data[zip.lfh_off[i]];
LFH* lfh = &zip.start[zip.lfh_off[i]];
if (lfh->compression_method == DEFLATE)
{
@ -72,8 +73,7 @@ bool scan_zip(char* zip_data, int zip_size)
fprintf(stderr, "[FILE %d] Error in compressed data\n", i);
}
#include <string.h>
if (strcmp("VIRUS", decoded_data) == NULL)
if (strcmp("VIRUS", decoded_data) == 0)
{
printf("-> VIRUS FOUND\n");
return true;