1 files changed, 80 insertions, 0 deletions
diff --git a/patcher.c b/patcher.c
new file mode 100644
index 0000000..30e4620
--- /dev/null
+++ b/patcher.c
@@ -0,0 +1,80 @@
+/**
+ * patcher.c
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "crypto.h"
+#include "patcher.h"
+#include "wii_tmd.h"
+
+int trucha_sign_ticket(u8 *ticket, u32 ticket_len)
+{
+	u8 sha1[20];
+	u16 i;
+
+	for(i=0; i<65535; i++) {
+		memcpy(ticket+OFFSET_BF, &i, sizeof(u16));
+		sha(ticket+0x140, ticket_len-0x140, sha1);
+		if (sha1[0] == 0x00) break;
+	}
+
+	if (i == 65535)
+		return 0;
+	else	return 1;
+}
+
+int change_region_code(FILE *f, u32 tmd_len)
+{
+	u8 *tmd;
+	u8 region;
+	char input[10];
+
+	fseek(f, OFFSET_TMD, SEEK_SET);
+	tmd = (u8*)malloc(tmd_len);
+	if (tmd == NULL) {
+		fprintf(stderr, "mem error\n");
+		return 0;
+	}
+
+	fread((u8*)tmd, tmd_len, 1, f);
+
+	dump_tmd_raw((u8*)tmd);
+
+	region = tmd[OFFSET_REGION];
+	int i;
+	do {
+		printf("Region is set to %s\n",region_names[region]);
+		printf("New region: \n");
+		for(i=0; i<4; i++)
+			printf("%d- %s\n",i, region_names[i]);
+		printf("Enter your new choice:");
+		fflush(stdout);
+		fgets(input, 9, stdin);
+		region = atoi(input);
+		if (region > 4) 
+			region = 0x04;
+			
+		printf("New region is set to %s, do you agree? (y/n) ",region_names[region]);
+		fflush(stdout);
+		fgets(input, 9, stdin);
+	} while(input[0] != 'y');
+
+	tmd[OFFSET_REGION] = region;
+	
+	printf("\tSigning...\n");
+		if (trucha_sign_ticket(tmd, tmd_len) == 0) {
+		fprintf(stderr, "Error signing TMD\n");
+		return 0;
+	}
+	printf("\tdone.\n\n");
+
+	printf("Writing changes... \n");
+	fseek(f, OFFSET_TMD, SEEK_SET);
+	fwrite((u8*)tmd, tmd_len, 1, f);
+
+	free(tmd);
+	return 1;
+}
+