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#include "mswchksm.c"
#include <stdlib.h>
int main( int argc, char *argv[] )
{
int set;
FILE * fp;
long FileSize;
unsigned short sum16computed, sum16stored = 0xb8dd;
unsigned long sum32computed, sum32stored = 0xa25ce7ac;
long sum32off;
if (argc < 2) {
fprintf( stderr, "Usage: %s [-s] file.exe\n", argv[0] );
exit(1);
}
if (argc > 2) {
set = 1;
fp = openfile( argv[2], "r+b", &FileSize );
} else {
set = 0;
fp = openfile( argv[1], "rb", &FileSize );
}
if (fp == NULL) {
exit(1);
}
fprintf( stderr, "File Size = %ld (%lx)\n", FileSize, FileSize );
sum16computed = mswCheck16( fp, FileSize, &sum16stored );
if (!mswCheck32( fp, FileSize, &sum32off, &sum32computed, &sum32stored )) {
fprintf( stderr, "mswCheck32 error\n" );
}
fprintf( stderr, "sum16: stored = %x, computed = %x, sum = %x, expected FFFF\n",
sum16stored, sum16computed, sum16stored+sum16computed );
fprintf( stderr, "sum32: stored = %lx, computed = %lx, expected %lx\n",
sum32stored, sum32computed, sum32stored );
if (set) {
fseek( fp, 0x12, SEEK_SET );
sum16computed = 0xFFFF - sum16computed;
fwrite( &sum16computed, sizeof sum16computed, 1, fp );
fseek( fp, sum32off, SEEK_SET );
/*fwrite( &sum32computed, sizeof sum32computed, 1, fp );*/
fflush( fp );
}
fclose(fp);
exit(0);
}
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