It’s not easy to decrypt the file with out the key. Again it depends on the algorithm you used to encrypt. If you have used some weak algorithm like DES then you can try to find the key via Birthday Attack. Or else best way if you remember something about the key to. How to decrypt dmg file in linux Ubuntu, Linux Mint, Kali Linux 1. Sudo apt update 2. Git clone decrypt 3.

Original source: https://github.com/0xced/iOS-Artwork-Extractor/wiki/Extracting-more-artwork

You can extract even more artwork if you decrypt and mount an iOS firmware (.ipsw file).

Requirements

Python 3.2 (required by ipsw_decrypt.py)
VFDecrypt (required by ipsw_decrypt.py)
Make sure to install the vfdecrypt binary somewhere in your PATH or use the -d option of the the ipsw_decrypt.py script.

VFDecrypt Usage: Nexus 2 full cracked download.

How to decrypt and mount an iOS firmware

Decrypt Dmg File Without Key Free

Download an iPhone or iPad firmware that matches your simulator version and make sure that there is a VFDecrypt Key by checking the corresponding Build column. For beta versions, check the VFDecrypt Keys page instead.

System Firmware Image `ipsw`

Version	Build	Codename	Baseband	Release Date	IPSW Download URL	SHA1 Hash	File Size
9.0	13A343	Monarch	1.00.05	16 Sep 2015	iPhone8,2_9.0_13A343_Restore.ipsw	62c84322d95913ddcee8337c0998988c6acd330e	2,369,374,167
9.0.1	13A405	Monarch	1.00.05	24 Sep 2015	iPhone8,2_9.0.1_13A405_Restore.ipsw	c13f78d5967632732841fcae9840bfd37d09b5af	2,368,629,853
9.0.2	13A452	Monarch	1.02.00	30 Sep 2015	iPhone8,2_9.0.2_13A452_Restore.ipsw	46b922b4755fcb66e9f33dd491002e120b88908a	2,369,099,889
9.1	13B143	Boulder	1.14.00	21 Oct 2015	iPhone8,2_9.1_13B143_Restore.ipsw	634807da8e723d688419b56f14b0913aee317760	2,383,904,492
9.2	13C75	Castlerock	1.23.00	8 Dec 2015	iPhone8,2_9.2_13C75_Restore.ipsw	f89ea6f273dde92167c408decdb5db3daa756a19	2,382,945,535

Backup Firmware Image

Start iTunes on your computer, and then connect your iPhone to your computer using its sync cable.
Click the button for your device near the upper-right corner of the iTunes screen, and then click the 'Summary' tab if it isn't already selected.
Select 'This Computer' in the Backups section, and then click 'Back Up Now.' ITunes backs up your entire iPhone, including iOS, to the hard drive.
Confirm that the backup was successful by selecting 'Preferences' from the main iTunes menu, clicking the 'Devices' tab, and then making sure that the time and date next to your iPhone's entry correspond to when you finished the backup.
Disconnect your iPhone from your computer.

Decrypting with `ipsw_decrypt.py`

Run the ipsw_decrypt.py script on the firmware you downloaded or backed up.
The output should look like this:
Go into the iPhone 4, 5.1 (9B176) folder or whatever folder was created depending on the firmware you chose.
Open the biggest file ending with .decrypted.dmg in order to mount the disk image. In this example: 038-1768-165.decrypted.dmg
Run iOS Artwork Extractor. If the mounted iOS firmware version matches your simulator version, then you will discover much more artwork.

iOS 8 firmware

VFDecrypt Keys are not widely available for iOS 8. You will have to use vfdecrypt directly on the unzipped iPhone 4S ipsw with the key provided by @iH8sn0w:

@Jato_BZ which keys? Or just rootfs like the 4S one? 5059b2da95c93f754ce4a701cf6564877dfee899ad884d78f3403dcec7bbd6fe6d3079a8

July 27th, 2016 by Oleg Afonin
Category: «Cryptography», «Elcomsoft News», «General», «Security»

In the world of Windows dominance, Apple’s Mac OS X enjoys a healthy market share of 9.5% among desktop operating systems. The adoption of Apple’s desktop OS (macOS seems to be the new name) is steadily growing. Harry potter part 1 online. This is why we are targeting Mac OS with our tools.

This time, let’s talk about Mac OS X user account passwords. Not only will a user password allow accessing their Mac, but it will also allow decrypting FileVault 2 volumes that are otherwise securely encrypted with virtually unbreakable XTS-AES.

Attacking FileVault 2

FileVault 2 is Apple’s take on whole-disk encryption. Protecting the entire startup partition, FileVault 2 volumes can be unlocked with either of the following:

Decrypt Dmg File Without Key

256-bit XTS-AES key
Recovery Key
User password from any account with “unlock” privileges

There is also an additional unlock method available called Institutional Recovery Key. These recovery keys are created when system administrators enable FileVault 2 encryption with FileVaultMaster.keychain. This method requires additional steps to activate, and is typically used in organizations with centralized keychain management.

256-bit XTS-AES Key

Location: RAM (only while the encrypted volume is mounted)

The 256-bit XTS-AES key is the actual encryption key that is used by the system to encrypt and decrypt data. This is a binary key. Once the FileVault 2 volume is unlocked, the XTS-AES key is stored in the computer’s RAM.

In order to recover these keys, one would need to dump the content of the computer’s RAM into a file. Note that it is no longer possible to run a FireWire attack on locked or sleeping Macs due to Mac OS X security restrictions, so the RAM capturing tool must be executed on a running computer with FileVault 2 container unlocked and a user logged in.

Recovery Key

Location: printed notes, Apple cloud Bergeys manual chart.

Extraction: search, cloud acquisition (coming to Elcomsoft Phone Breaker 6.0), request from Apple

Similar to BitLocker, FileVault 2 employs Recovery Keys to enable users unlock their encrypted volumes if the disk is moved to a different device or if no user account with ‘unlock’ privileges is present in the system. Once FileVault 2 is enabled, the system creates and displays a recovery key. According to http://eprint.iacr.org/2012/374.pdf, the recovery key contains 120 bits (we didn’t check) that are encoded with all letters and numbers 1 through 9, and formatted to look like this:

XDFG-EE8G-KF89-S0FS-9F7Y-XFH8

The user has an option to store the key with Apple. If the user agrees, the recovery key gets stored in the iCloud account associated with the user’s Apple ID (which is required to use the service).

While brute-forcing a 120-bit key seems easier than attempting to brute-force a 256-bit key, the security of a 120-bit key is still enough to make the attack unfeasible. This key is only useful if you can obtain it by searching the premises, downloading from the user’s iCloud account or requesting from Apple (if you