void CWiiSaveCrypted::ReadHDR()
{
File::IOFile fpData_bin(pathData_bin, "rb");
if (!fpData_bin)
{
PanicAlertT("Cannot open %s", pathData_bin);
b_valid = false;
return;
}
if (!fpData_bin.ReadBytes(&_encryptedHeader, HEADER_SZ))
{
PanicAlertT("Failed to read header");
b_valid = false;
return;
}
fpData_bin.Close();
AES_cbc_encrypt((const u8*)&_encryptedHeader, (u8*)&_header, HEADER_SZ, &m_AES_KEY, SD_IV, AES_DECRYPT);
_bannerSize = Common::swap32(_header.hdr.BannerSize);
if ((_bannerSize < FULL_BNR_MIN) || (_bannerSize > FULL_BNR_MAX) ||
(((_bannerSize - BNR_SZ) % ICON_SZ) != 0))
{
PanicAlertT("Not a Wii save or read failure for file header size %x", _bannerSize);
b_valid = false;
return;
}
m_TitleID = Common::swap64(_header.hdr.SaveGameTitle);
memcpy(md5_file, _header.hdr.Md5, 0x10);
memcpy(_header.hdr.Md5, MD5_BLANKER, 0x10);
md5((u8*)&_header, HEADER_SZ, md5_calc);
if (memcmp(md5_file, md5_calc, 0x10))
{
PanicAlertT("MD5 mismatch\n %016llx%016llx != %016llx%016llx", Common::swap64(md5_file),Common::swap64(md5_file+8), Common::swap64(md5_calc), Common::swap64(md5_calc+8));
b_valid= false;
}
if (!getPaths())
{
b_valid = false;
return;
}
if (!File::Exists(BannerFilePath) || AskYesNoT("%s already exists, overwrite?", BannerFilePath.c_str()))
{
INFO_LOG(CONSOLE, "Creating file %s", BannerFilePath.c_str());
File::IOFile fpBanner_bin(BannerFilePath, "wb");
fpBanner_bin.WriteBytes(_header.BNR, _bannerSize);
}
}
void CWiiSaveCrypted::WriteHDR()
{
if (!b_valid) return;
memset(&_header, 0, HEADER_SZ);
std::string BannerFilePath = WiiTitlePath + "banner.bin";
u32 bannerSize = File::GetSize(BannerFilePath);
_header.hdr.BannerSize = Common::swap32(bannerSize);
_header.hdr.SaveGameTitle = Common::swap64(m_TitleID);
memcpy(_header.hdr.Md5, MD5_BLANKER, 0x10);
_header.hdr.Permissions = 0x3C;
File::IOFile fpBanner_bin(BannerFilePath, "rb");
if (!fpBanner_bin.ReadBytes(_header.BNR, bannerSize))
{
PanicAlertT("Failed to read banner.bin");
b_valid = false;
return;
}
// remove nocopy flag
_header.BNR[7] &= ~1;
u8 md5_calc[16];
md5((u8*)&_header, HEADER_SZ, md5_calc);
memcpy(_header.hdr.Md5, md5_calc, 0x10);
aes_crypt_cbc(&m_AES_ctx, AES_ENCRYPT, HEADER_SZ, SD_IV, (const u8*)&_header, (u8*)&_encryptedHeader);
File::IOFile fpData_bin(encryptedSavePath, "wb");
if (!fpData_bin.WriteBytes(&_encryptedHeader, HEADER_SZ))
{
PanicAlertT("Failed to write header for %s", encryptedSavePath.c_str());
b_valid = false;
}
}
