Apple Firmware Inspector

Apple Firmware Inspector

Install: brew install blacktop/tap/ipsw.

When a device target is needed, resolve current identifiers with ipsw device-list or live data. Do not copy stale iPhone identifiers.

Workflows

Firmware:

ipsw download ipsw --device "$DEVICE" --latest
ipsw download ipsw --device "$DEVICE" --latest --kernel --dyld
ipsw extract --kernel "$LATEST_IPSW"
ipsw extract --dyld --dyld-arch arm64e "$LATEST_IPSW"
ipsw extract --kernel --remote <IPSW_URL>

Userspace / dyld shared cache:

DSC=/System/Volumes/Preboot/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_arm64e
ipsw dyld a2s "$DSC" 0xADDR
ipsw dyld symaddr "$DSC" "_symbol" --image Some.framework/Some
ipsw dyld disass "$DSC" --vaddr 0xADDR
ipsw dyld disass "$DSC" --symbol "_symbol" --image Some.framework/Some
ipsw dyld xref "$DSC" 0xADDR --all
ipsw dyld dump "$DSC" 0xADDR --size 256
ipsw dyld str "$DSC" "pattern" --image Some.framework/Some
ipsw dyld objc --class "$DSC" --image Some.framework/Some
ipsw dyld extract "$DSC" Some.framework/Some -o ./out/

Kernel/KEXT:

ipsw kernel kexts kernelcache.release.$DEVICE
ipsw kernel extract kernelcache sandbox --output ./kexts/
ipsw kernel syscall kernelcache
ipsw kernel kexts --diff "kernelcache_old" "kernelcache_new"

Entitlements:

ipsw macho info --ent /path/to/binary
ipsw ent --sqlite ent.db --ipsw "$LATEST_IPSW"
ipsw ent --sqlite ent.db --key "com.apple.private.security.no-sandbox"

Class dump:

ipsw class-dump "$DSC" SpringBoardServices --headers -o ./headers/
ipsw class-dump "$DSC" Security --class SecKey
ipsw class-dump "$DSC" UIKit --class 'UIApplication.*' --headers -o ./headers/
ipsw class-dump "$DSC" Security --re

Mach-O:

ipsw macho info /path/to/binary
ipsw macho disass /path/to/binary --symbol _main
ipsw macho info --sig /path/to/binary

Tips

• First a2s/symaddr creates cache; later lookups are faster.
• Use --image <DYLIB> for DSC operations; it is much faster.
• Most commands support --json for scripting.

References

• references/download.md
• references/dyld.md
• references/kernel.md
• references/entitlements.md
• references/class-dump.md
• references/macho.md