Extracting dyld_shared_cache from iPod 4 IPSW doesn't work

[PoomSmart]

What happened?

poomsmart@M1-MBP Downloads % ipsw extract -d iPod4,1_6.1.6_10B500_Restore.ipsw
   ⨯ failed to parse Img3 DeviceTree: encrypted device tree
   • Extracting dyld_shared_cache
   ⨯ failed to parse Img3 DeviceTree: encrypted device tree
      • Mounting DMG 058-2543-001.dmg
Enter password to access "058-2543-001.dmg":

   ⨯ failed to IPSW FS dmg: failed to mount 058-2543-001.dmg: exit status 1: hdiutil: attach failed - Authentication error

How can we reproduce this?

Download iPod 4 6.1.6 IPSW and try to use it with ipsw: https://secure-appldnld.apple.com/iOS6.1/031-3211.20140221.Placef/iPod4,1_6.1.6_10B500_Restore.ipsw

Enter the rootfs key when it asks for the password.

ipsw version

Version: 3.1.581, BuildCommit: a506461f28a7668194db9dd6a1071455e0844376

Search

• I did search for other open and closed issues before opening this

Code of Conduct

• I agree to follow this project's Code of Conduct

Additional context

No response

[blacktop]

I'll look into it, but in the meantime can you try ipsw mount fs iPod4,1_6.1.6_10B500_Restore.ipsw --lookup

[PoomSmart]

Here's the output:

poomsmart@M1-MBP ios6.1.6 % ipsw mount fs iPod4,1_6.1.6_10B500_Restore.ipsw --lookup
   ⨯ failed to parse IPSW filename: iPod4,1_6.1.6_10B500_Restore.ipsw

[blacktop]

if you are able to build master; can you try that fix?

[PoomSmart]

Yes, it works now. 👍🏻

poomsmart@M1-MBP ipsw % ./ipsw mount fs iPod4,1_6.1.6_10B500_Restore.ipsw --lookup
   • Downloading Keys...      
   ⨯ failed to parse Img3 DeviceTree: encrypted device tree
   • Mounted fs DMG 058-2543-001.dmg
      • Press Ctrl+C to unmount '/tmp/058-2543-001.dmg.mount' ...