gc-forever - Gamecube/Wii Forums

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u32 GetBIGContent(FILE *f, u64 id, u16 content, u16 index, u32 size)
{
	char path[ISFS_MAXPATH];
	
	sprintf(path, "/title/%08x/%08x/content/%08x.app", TITLE_UPPER(id), TITLE_LOWER(id), content);
	logfile("Regular content path is '%s'.\n", path);
	printf("Adding regular content %08x.app... ", content);
	
	s32 fd = ISFS_Open(path, ISFS_OPEN_READ);
	if (fd < 0)
	{
		//printf("ISFS_Open for '%s' returned %d.\n", path, fd);
		logfile("ISFS_Open for '%s' returned %d.\n", path, fd);
		return 0;
	}
	
	u32 blksize = BLOCKSIZE; // 16KB
	
	u8 *buffer = (u8*)memalign(32, blksize);
	if (buffer == NULL)
	{
		//printf("Allocating memory for buffer failed.\n");
		logfile("Allocating memory for buffer failed.\n");
		ISFS_Close(fd);
		Unmount_Devices();
		Reboot();
	}
	
	u8 *encryptedcontentbuf = (u8*)memalign(32, blksize);
	if (encryptedcontentbuf == NULL)
	{
		//printf("Allocating memory for buffer failed.\n");
		logfile("Allocating memory for encryptedcontentbuf failed.\n");
		ISFS_Close(fd);
		Unmount_Devices();
		Reboot();
	}
	
	u32 i, pad, size2 = 0;
	s32 ret = 0;
	
	logfile("Writing...\n");
	for (i = 0; i < size; i += blksize)
	{
		if (blksize > size - i)
		{
			blksize = size - i;
		}
		
		ret = ISFS_Read(fd, buffer, blksize);
		if (ret < 0) break;
		
		/* Pad data to a 16-byte boundary (required for the encryption process). Probably only needed for the last chunk */
		if ((blksize % 16) != 0)
		{
			pad = 16 - blksize % 16;
			memset(&(buffer[i+blksize]), 0x00, pad);
			logfile("Content chunk #%u padded to 16-byte boundary. Current blksize: %u.\n", (i / 0x4000), blksize);
			blksize += pad;
		}
		
		encrypt_buffer(index, buffer, encryptedcontentbuf, blksize);
		
		/* Pad data to a 64-byte boundary (required for the WAD alignment). Again, probably only needed for the last chunk */
		if ((blksize % 64) != 0)
		{
			pad = 64 - blksize % 64;
			memset(&(encryptedcontentbuf[i+blksize]), 0x00, pad);
			logfile("Encrypted content chunk #%u padded to 64-byte boundary. Current blksize: %u.\n", (i / 0x4000), blksize);
			blksize += pad;
		}
		
		fwrite(encryptedcontentbuf, 1, blksize, f);
		
		size2 += blksize;
	}
	
	logfile("Content added successfully. Original content size: %u bytes. size2: %u bytes.\n", size, size2);
	
	free(buffer);
	free(encryptedcontentbuf);
	ISFS_Close(fd);
	
	if (ret < 0)
	{
		//printf("Failed to read data into content buffer.");
		logfile("Failed to read data into content buffer.");
		fclose(f);
		Unmount_Devices();
		Reboot();
	}
	
	printf("done.\n");
	
	header->data_len += size2;
	return size2;
}