DMG2IMG is a tool which allows converting Apple compressed dmg
archives to standard (hfsplus) image disk files.
This tool handles zlib and bzip2 compressed dmg images.
USAGE:
dmg2img [-l] [-p N] [-s] [-v] [-V] [-d] <input.dmg> [<output.img>]
or
dmg2img -i <input.dmg> -o <output.img>
It is derived from dmg2iso v0.2c by vu1tur <to@vu1tur.eu.org>
NOTES:
1. An equivalent command under Mac OS X would be:
hdiutil convert <input.dmg> -format UDTO -o <output.img>
2. Under linux, the image disk file can be mounted with the commands
modprobe hfsplus
mount -t hfsplus -o loop <output.img> /mnt
[normally, only 'root' might be able to do this]
3. Windows users should be able to open the image disk file with UltraISO.
Jean-Pierre Demailly <demailly@fourier.ujf-grenoble.fr>
COMPILATION:
The default included Makefile is for Linux/gcc. The development files
in zlib-dev and libbz2-dev are needed to compile dmg2img, and those
in openssl-dev are needed to compile vfdecrypt.
CHANGELOG:
1.0 3 August 2007
* Initial version
1.1 4 August 2008
* Fixed segfault bug occurring when decompressing certain dmg files
beyond the actual end of the file (due to not correctly setting
the size of the compressed parts ...)
* Added slightly modified vfdecrypt utility from
Weinmann-Appelbaum-Fromme in order to decrypt encrypted dmg files.
1.2 17 September 2008
* Fixed segfault bug due to buffer overflow (buffer sizes
incorrectly set, resulting in insufficient memory allocation).
* Fixed most compilation warnings - remaining ones are
irrelevant with standard compilers.
1.3 19 September 2008
* Further fixes which (hopefully) enable dmg2img to work on
dmg archives of arbitrary size, while reducing RAM usage a lot.
* A lot of thanks to Alfred E. Hegge and Randy Broman for testing
and reporting bugs.
1.4 5 April 2009
* Applied patch from Vladimir 'phcoder' Serbinenko which brings
correct handling of 64bit integers in koly signature and
plist data, and should enable dmg2img to work on huge
archives > 4GBytes (tested by 'phcoder').
* Added support for dmg archives involving bzip2 instead of zlib
compression (this has not received much testing yet, as those
archives are still unfrequent).
* Many thanks to Pierre Duhem for useful hints.
1.4.1 6 April 2009
* Fixed a bug in writing the output file that caused some DMG images
to convert to a broken unmountable IMG image.
1.5 8 April 2009
* Fixed a bug in parsing plist for image partitions.
* Added support for ADC-compressed dmg images.
1.5.1 11 April 2009
* Added missing zero block type.
* Small fixes and clean up.
1.6 15 April 2009
* Added support for dmg images that only have binary resource fork
but no XML plist.
* Refined koly block processing.
* Fixed a bug in finding the offset for the next compressed block
when offsets are defined relative to the current partition.
* Fixed broken progress indicator.
* Added detection of images with GUID Partition Table and respective
mount commands in linux.
1.6.1 12 August 2009
* Fixed a bug in handling large files on win32 systems.
1.6.2 24 March 2010
* Fixed a bug in processing a terminal block type.
* Added periodic flushing of debug log file.
1.6.3 07 April 2012
* Added option -l to list partitions
* Added option -p to extract only specific partition
* Added support for a rare case scenario of koly block being at the
the beginning of the image (thanks to Friik)
1.6.4 25 April 2012
* Compilation bugfix (Linux)
1.6.5 23 July 2013
* Fixed a bug in handling some types of dmg files
1.6.6 06 February 2017
* Fixed a crash on invalid block signature (thanks to Peter Wu)
1.6.7 09 February 2017
* Fixed buffer underrun (thanks to Peter Wu)
* Avoid truncating .img file when run to list partition
(thanks to Frederic Germain)
* Small fixes and cleanup
http://vu1tur.eu.org/dmg2img