// write a file into ark
// (upon adding, all files flagged as encrypted will be encrypted)
bool ArkFile::WriteFile(const FileEntry& entry)
{
if( !IsOpen() )
return false;
// file must be external in order to write it into ark
if( !entry.IsExternal() )
return false;
FILE* src_fd = fopen(entry.Filename(), "rb");
if(src_fd == NULL)
return false;
bool result = WriteFile(src_fd, entry);
fclose(src_fd);
return result;
}
// reads a file from ark into currently open file descriptor "destFd"
bool ArkFile::ReadFile(FILE* destFd, const FileEntry& entry, bool performDecrypts)
{
if( !IsOpen() )
return false;
if(destFd == NULL)
return false;
// test for possible encrypted song files
bool is_mogg_file = performDecrypts && (strstr(entry.Arkname(), ".mogg") != 0);
bool is_pss_file = performDecrypts && (strstr(entry.Arkname(), ".pss") != 0);
bool is_vgs_file = performDecrypts && (strstr(entry.Arkname(), ".vgs") != 0);
if( entry.IsExternal() )
{
// read out file from external file on pc
FILE* src_fd = fopen(entry.Filename(), "rb");
if(src_fd == NULL)
return false;
s64 filesize;
if( !performDecrypts && entry.Encrypted() )
{
// external file is in decrypted form on pc
// but is required to be read out in encrypted form
// this occurs when an external file is added to an ark then the ark is "saved as"
unsigned char* temp = new unsigned char[(int)entry.Arksize()];
memcpy(temp, &G_CRYPT_KEY, 4);
if( fread( temp+4, 1, (int)entry.Filesize(), src_fd) != entry.Filesize() )
{
delete[] temp;
return false;
}
if( mNewEncryption )
dtb_crypt_new(temp, (int)entry.Arksize());
else
dtb_crypt_old(temp, (int)entry.Arksize());
if( fwrite(temp, 1, (int)entry.Arksize(), destFd) != entry.Arksize() )
{
delete[] temp;
return false;
}
delete[] temp;
return true;
}
else if( performDecrypts && entry.Encrypted() )
{
// external file is in decrypted form on pc
// but is required to be read out in decrypted form
// so just read it straight out
filesize = entry.Filesize();
}
else if( !entry.Encrypted() )
{
// external file either isnt encrypted
filesize = entry.Arksize();
}
for(s64 i=0; i<filesize; i+=MS_WORK_BUFFER_SIZE)
{
int read_size = (int)(min(filesize-i, MS_WORK_BUFFER_SIZE));
if( fread( mpWorkBuff, 1, read_size, src_fd) != read_size ||
fwrite(mpWorkBuff, 1, read_size, destFd) != read_size )
{
fclose(src_fd);
return false;
}
}
bool read_result = true;
// decrypt output song files if they need to be
if(is_mogg_file)
{
s64 end_file_loc = FTELL64(destFd);
FSEEK64(destFd, -entry.Arksize(), SEEK_CUR);
if( IsMoggEncrypted(destFd) )
read_result = DecryptMogg(destFd);
else
FSEEK64(destFd, end_file_loc, SEEK_SET);
}
else if(is_pss_file)
{
s64 end_file_loc = FTELL64(destFd);
FSEEK64(destFd, -entry.Arksize(), SEEK_CUR);
if( IsPssEncrypted(destFd) )
read_result = DecryptPss(destFd);
else
FSEEK64(destFd, end_file_loc, SEEK_SET);
}
else if(is_vgs_file)
{
s64 end_file_loc = FTELL64(destFd);
FSEEK64(destFd, -entry.Arksize(), SEEK_CUR);
if( IsVgsEncrypted(destFd) )
read_result = DecryptVgs(destFd);
else
FSEEK64(destFd, end_file_loc, SEEK_SET);
}
// close external source file
fclose(src_fd);
return read_result;
}
else
{
// read out file from inside ark file
FILE* src_fd = GetHandleFromOffset(entry.Offset(), true);
if(src_fd == NULL)
return false;
if( performDecrypts && entry.Encrypted() )
{
// file needs to be decrypted
unsigned char* temp = new unsigned char[(int)entry.Arksize()];
if( fread( temp, 1, (int)entry.Arksize(), src_fd) != entry.Arksize() )
{
delete[] temp;
return false;
}
if( mNewEncryption )
dtb_crypt_new(temp, (int)entry.Arksize());
else
dtb_crypt_old(temp, (int)entry.Arksize());
if( fwrite(temp+4, 1, (int)entry.Filesize(), destFd) != entry.Filesize() )
{
delete[] temp;
return false;
}
delete[] temp;
return true;
}
else
{
for(s64 i=0; i<entry.Arksize(); i+=MS_WORK_BUFFER_SIZE)
{
int read_size = (int)(min(entry.Arksize()-i, MS_WORK_BUFFER_SIZE));
if( fread( mpWorkBuff, 1, read_size, src_fd) != read_size ||
fwrite(mpWorkBuff, 1, read_size, destFd) != read_size )
{
return false;
}
}
bool read_result = true;
if(is_mogg_file)
{
s64 end_file_loc = FTELL64(destFd);
FSEEK64(destFd, -entry.Arksize(), SEEK_CUR);
if( IsMoggEncrypted(destFd) )
read_result = DecryptMogg(destFd);
else
FSEEK64(destFd, end_file_loc, SEEK_SET);
}
else if(is_pss_file)
{
s64 end_file_loc = FTELL64(destFd);
FSEEK64(destFd, -entry.Arksize(), SEEK_CUR);
if( IsPssEncrypted(destFd) )
read_result = DecryptPss(destFd);
else
FSEEK64(destFd, end_file_loc, SEEK_SET);
}
else if(is_vgs_file)
{
s64 end_file_loc = FTELL64(destFd);
FSEEK64(destFd, -entry.Arksize(), SEEK_CUR);
if( IsVgsEncrypted(destFd) )
read_result = DecryptVgs(destFd);
else
FSEEK64(destFd, end_file_loc, SEEK_SET);
}
return read_result;
}
}
}