| 637 | } |
| 638 | |
| 639 | BOOL |
| 640 | CryptFileForward::UnlockFile(LONGLONG ByteOffset, LONGLONG Length) |
| 641 | { |
| 642 | if (m_real_file_size == (long long)-1) |
| 643 | return FALSE; |
| 644 | |
| 645 | long long start_block = ByteOffset / PLAIN_BS; |
| 646 | |
| 647 | long long end_block = (ByteOffset + Length - 1) / PLAIN_BS; |
| 648 | |
| 649 | long long start_offset = CIPHER_FILE_OVERHEAD + start_block*CIPHER_BS; |
| 650 | |
| 651 | long long end_offset = CIPHER_FILE_OVERHEAD + end_block*CIPHER_BS; |
| 652 | |
| 653 | long long length = end_offset - start_offset; |
| 654 | |
| 655 | |
| 656 | LARGE_INTEGER off, len; |
| 657 | |
| 658 | off.QuadPart = start_offset; |
| 659 | |
| 660 | len.QuadPart = length; |
| 661 | |
| 662 | return ::UnlockFile(m_handle, off.LowPart, off.HighPart, len.LowPart, len.HighPart); |
| 663 | } |
| 664 | |
| 665 | |
| 666 |
no outgoing calls
no test coverage detected