Dar: encrypt backup
Problem
I want to encrypt my dar backup, but dar replies:
Aborting program. The requested operation needs a feature that has been disabled at compilation time: blowfish strong encryption support
Solution
- Install package using YaST: openssl-devel
- Download, configure, make, checkinstall dar-2.3.0
Journal
20060520
Added http://download.opensuse.org/distribution/SL-10.0-OSS/inst-source/ as YaST installation source. Now I can select from within YaST 'dar' and select 'Install sources (RPMS)'.
Directory /usr/src/packages/SOURCES now contains:
dar.diff dar-2.2.2.tar.bz2
Output of dar -V:
dar version 2.2.2, Copyright (C) 2002-2052 Denis Corbin Long options support : YES Using libdar 3.0.2 built with compilation time options: Libz compression (gzip) : YES Libbz2 compression (bzip2) : YES Strong encryption : NO Extended Attributes support: NO Large files support (> 2GB): YES ext2fs NODUMP flag support : YES Special allocation scheme : YES Integer size used : unlimited Thread safe support : YES compiled the Sep 9 2005 with GNUC version 4.0.2 20050901 (prerelease) (SUSE Linux) dar is part of the Disk ARchive suite (Release 2.2.2) dar comes with ABSOLUTELY NO WARRANTY; for details type `dar -W'. This is free software, and you are welcome to redistribute it under certain conditions; type `dar -L | more' for details.
Installed rpm libxcrypt.
20060521
From ./configure I can see dar looks for openssl/blowfish.h, so I installed openssl-devel.
./configure says:
checking openssl/blowfish.h usability... yes checking openssl/blowfish.h presence... yes
dar and libdar have been successfully configured with the following parameters: LIBDAR parameters: Zlib compression (gzip) : NO Libbz2 compression (bzip2) : YES Strong encryption support : YES Extended Attributes support: NO Large files support (> 2GB): YES ext2fs NODUMP flag support : NO Special allocation scheme : YES Integer size used : infinint Thread safe support : YES DAR SUITE command line programs: Long options available : YES Building examples : NO Building dar_static : YES using upx at install : YES building documentation : NO
Uninstalled existing dar via YaST.
./configure make su - checkinstall rpm -i
Now dar -V shows – still no encryption?:
dar version 2.2.2, Copyright (C) 2002-2052 Denis Corbin Long options support : YES Using libdar 3.0.2 built with compilation time options: Libz compression (gzip) : YES Libbz2 compression (bzip2) : YES Strong encryption : NO Extended Attributes support: NO Large files support (> 2GB): YES ext2fs NODUMP flag support : YES Special allocation scheme : YES Integer size used : unlimited Thread safe support : YES compiled the May 21 2006 with GNUC version 4.0.2 20050901 (prerelease) (SUSE Linux) dar is part of the Disk ARchive suite (Release 2.2.2) dar comes with ABSOLUTELY NO WARRANTY; for details type `dar -W'. This is free software, and you are welcome to redistribute it under certain conditions; type `dar -L | more' for details.
Even though I've compiled libdar today (2006-05-21), libdar.so hasn't been modified:
/usr/src/packages/SOURCES # ls -l /usr/lib/libdar.* -rw-r--r-- 1 root root 2031184 Sep 9 2005 /usr/lib/libdar.a -rw-r--r-- 1 root root 839 Sep 9 2005 /usr/lib/libdar.la lrwxrwxrwx 1 root root 15 May 21 18:07 /usr/lib/libdar.so -> libdar.so.3.0.2* lrwxrwxrwx 1 root root 15 Feb 21 21:07 /usr/lib/libdar.so.3 -> libdar.so.3.0.2* -rwxr-xr-x 1 root root 1017728 Sep 9 2005 /usr/lib/libdar.so.3.0.2*
Downloaded dar-2.3.0 from http://sourceforge.net/project/showfiles.php?group_id=65612
Configure now says:
dar and libdar have been successfully configured with the following parameters: LIBDAR parameters: Zlib compression (gzip) : NO Libbz2 compression (bzip2) : YES Strong encryption support : YES Extended Attributes support: NO Large files support (> 2GB): YES ext2fs NODUMP flag support : NO Special allocation scheme : YES Integer size used : infinint Thread safe support : YES DAR SUITE command line programs: Long options available : YES Building examples : NO Building dar_static : YES using upx at install : YES building documentation : NO
- Downloaded dar-2.3.0
- Uninstalled dar and libdar
- Compile, make, checkinstall
Now dar -V gives me error:
dar: error while loading shared libraries: libdar.so.4: cannot open shared object file: No such file or directory
Found answer at gmane.comp.sysutils.backup.dar.support:
Your system has problem with shared libraries. Either use static version of dar ( --disable-shared given to ./configure when building dar) or read documentation about ldconfig, or use LD_LIBRARY_PATH environment variable.
I ran ldconfig.
