In either case, only PDF files that can be opened without a password, and for which text extraction is permitted by the flags embedded in the file, can be indexed.ĭtSearch Corp. If these components are not installed, only 40-bit RC4 will be supported. These components include support for decrypting PDF files with the following types of encryption: AES (256-bit, 128-bit), RC4 (128-bit, 40-bit). The UWP and macOS native libraries all include support for encryption beyond 40-bit RC4. NET Standard SDK, all dtSearchEngine native library files except the Linux libdtSearchEngine.so files and the Windows dtSearchEngine.dll files.
The following dtSearch Engine components include support for encryption beyond 40-bit RC4:
To tell what kind of encryption is used in a PDF file, open the PDF file in Adobe Reader, click File > Document Properties, and click the Security tab. This type of PDF file can be opened in Adobe Reader with no need to enter a password, but you may not be able to print the PDF file or copy text to the clipboard from the PDF file. (2) A password that prevents certain operations (printing, editing, etc.) only. dtSearch cannot index files with this type of encryption at all. (1) A password that prevents any access to the file unless the user enters a password before opening it in Adobe Reader. PDF files can have two kinds of passwords: See Database files (*.mdb, *.dbf, *.csv). Binary components not listed, such as dtindexer.exe, dtsearch.exe, or dtWebSetup.exe, may not be distributed with an application licensed to use the dtSearch Engine, unless the license expressly provides otherwise.Įxternal file parsers such as dtv_rar.dll and dtv_ifilter.dll should be installed in a folder named "viewers" under the folder where the dtSearch Engine is located (the "Home" directory).įor more information on the Home directory and external file parsers, see Home and Private Directories.ĭtv_odbc.dll is not needed with dtSearch versions 7.54 and later. A license to distribute applications incorporating the dtSearch Engine also permits distribution of the other binary and data components listed above, to the same extent and subject to the same requirements applicable to the dtSearch Engine.
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