ctrtool: tmd savesize detection & smarter exheader pre check

ctrtool/exheader.c

@@ -42,6 +42,11 @@ void exheader_set_programid(exheader_context* ctx, u8 programid[8])
 	memcpy(ctx->programid, programid, 8);
 }
 
+void exheader_set_hash(exheader_context* ctx, u8 hash[32])
+{
+	memcpy(ctx->hash, hash, 32);
+}
+
 void exheader_set_counter(exheader_context* ctx, u8 counter[16])
 {
 	memcpy(ctx->counter, counter, 16);
@@ -94,6 +99,19 @@ void exheader_read(exheader_context* ctx, u32 actions)
 	}
 }
 
+int exheader_hash_valid(exheader_context* ctx)
+{
+	u8 hash[32];
+	ctr_sha_256((u8*)&ctx->header, 0x400, hash);
+
+	if(memcmp(ctx->hash,hash,0x20)){
+		fprintf(stderr, "Error, exheader hash mismatch. Wrong key?\n");
+		return 0;
+	}
+	
+	return 1;
+}
+
 int exheader_programid_valid(exheader_context* ctx)
 {
 	if (!settings_get_ignore_programid(ctx->usersettings))

ctrtool/exheader.h

@@ -109,6 +109,7 @@ typedef struct
 	settings* usersettings;
 	u8 partitionid[8];
 	u8 programid[8];
+	u8 hash[32];
 	u8 counter[16];
 	u8 key[16];
 	u32 offset;
@@ -134,6 +135,7 @@ void exheader_set_size(exheader_context* ctx, u32 size);
 void exheader_set_partitionid(exheader_context* ctx, u8 partitionid[8]);
 void exheader_set_counter(exheader_context* ctx, u8 counter[16]);
 void exheader_set_programid(exheader_context* ctx, u8 programid[8]);
+void exheader_set_hash(exheader_context* ctx, u8 hash[32]);
 void exheader_set_encrypted(exheader_context* ctx, u32 encrypted);
 void exheader_set_key(exheader_context* ctx, u8 key[16]);
 void exheader_set_usersettings(exheader_context* ctx, settings* usersettings);
@@ -143,6 +145,7 @@ int exheader_process(exheader_context* ctx, u32 actions);
 const char* exheader_getvalidstring(int valid);
 void exheader_print(exheader_context* ctx);
 void exheader_verify(exheader_context* ctx);
+int exheader_hash_valid(exheader_context* ctx);
 int exheader_programid_valid(exheader_context* ctx);
 void exheader_determine_key(exheader_context* ctx, u32 actions);
 

ctrtool/ncch.c

@@ -328,6 +328,7 @@ void ncch_process(ncch_context* ctx, u32 actions)
 	exheader_set_usersettings(&ctx->exheader, ctx->usersettings);
 	exheader_set_partitionid(&ctx->exheader, ctx->header.partitionid);
 	exheader_set_programid(&ctx->exheader, ctx->header.programid);
+	exheader_set_hash(&ctx->exheader, ctx->header.extendedheaderhash);
 	exheader_set_counter(&ctx->exheader, exheadercounter);
 	exheader_set_key(&ctx->exheader, ctx->key);
 	exheader_set_encrypted(&ctx->exheader, ctx->encrypted);
@@ -361,7 +362,7 @@ void ncch_process(ncch_context* ctx, u32 actions)
 
 	if (result && ncch_get_exheader_size(ctx))
 	{
-		if (!exheader_programid_valid(&ctx->exheader))
+		if (!exheader_hash_valid(&ctx->exheader))
 			return;
 
 		result = exheader_process(&ctx->exheader, actions);

ctrtool/tmd.c

@@ -86,6 +86,7 @@ void tmd_print(tmd_context* ctx)
 	ctr_tmd_header_2048* header2048 = 0;
 	ctr_tmd_body* body = 0;
 	unsigned int contentcount = 0;
+	unsigned int savesize = 0;
 	unsigned int i;
 
 	if (type == TMD_RSA_2048_SHA256 || type == TMD_RSA_2048_SHA1)
@@ -104,7 +105,8 @@ void tmd_print(tmd_context* ctx)
 	body = tmd_get_body(ctx);
 
 	contentcount = getbe16(body->contentcount);
-
+	savesize = getle32(body->savedatasize);
+	
 	fprintf(stdout, "\nTMD header:\n");
 	fprintf(stdout, "Signature type:         %s\n", tmd_get_type_string(type));
 	fprintf(stdout, "Issuer:                 %s\n", body->issuer);
@@ -115,6 +117,12 @@ void tmd_print(tmd_context* ctx)
 	memdump(stdout, "Title id:               ", body->titleid, 8);
 	fprintf(stdout, "Title type:             %08x\n", getbe32(body->titletype));
 	fprintf(stdout, "Group id:               %04x\n", getbe16(body->groupid));
+	if(savesize < sizeKB)
+		fprintf(stdout, "Save Size:              %08x\n", savesize);
+	else if(savesize < sizeMB)
+		fprintf(stdout, "Save Size:              %dKB (%08x)\n", savesize/sizeKB, savesize);
+	else
+		fprintf(stdout, "Save Size:              %dMB (%08x)\n", savesize/sizeMB, savesize);
 	fprintf(stdout, "Access rights:          %08x\n", getbe32(body->accessrights));
 	fprintf(stdout, "Title version:          %04x\n", getbe16(body->titleversion));
 	fprintf(stdout, "Content count:          %04x\n", getbe16(body->contentcount));

ctrtool/tmd.h

@@ -27,12 +27,16 @@ typedef struct
 	unsigned char titleid[8];
 	unsigned char titletype[4];
 	unsigned char groupid[2];
-	unsigned char padding3[62];
+	unsigned char savedatasize[4];
+	unsigned char privsavedatasize[4];
+	unsigned char padding3[4];
+	unsigned char twlflag;
+	unsigned char padding4[0x31];
 	unsigned char accessrights[4];
 	unsigned char titleversion[2];
 	unsigned char contentcount[2];
 	unsigned char bootcontent[2];
-	unsigned char padding4[2];
+	unsigned char padding5[2];
 	unsigned char hash[32];
 	unsigned char contentinfo[36*64];
 } ctr_tmd_body;