1 files changed, 42 insertions, 0 deletions
diff --git a/app/wlib/mswlib/checksum.c b/app/wlib/mswlib/checksum.c
new file mode 100644
index 0000000..f19d15b
--- /dev/null
+++ b/app/wlib/mswlib/checksum.c
@@ -0,0 +1,42 @@
+#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);
+}