dmg2img

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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 [email protected]

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 [email protected]

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