bluseliu50
4e61886d7d
The checks guarded a local development disk floor and do not belong in the shared scripts. The scratch image capacity check in prepare-air-nir-diagnostic.py is kept because it validates a mounted image, not the host disk.
52 lines
2.6 KiB
Python
52 lines
2.6 KiB
Python
#!/usr/bin/env python3
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"""Extract one manifest-selected volume from the supplied iPad7,1 iPadOS 17 IPSW."""
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import argparse
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import hashlib
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import json
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from pathlib import Path
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import plistlib
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import shutil
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import zipfile
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ROOT = Path(__file__).resolve().parents[1]
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument('component', choices=['OS', 'RestoreRamDisk', 'Cryptex1,SystemOS', 'Cryptex1,AppOS', 'StaticTrustCache', 'Cryptex1,SystemTrustCache'])
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parser.add_argument('--ipsw', type=Path, default=ROOT / 'refer/iPad_Pro_HFR_17.7.11_21H461_Restore.ipsw')
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args = parser.parse_args()
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out = ROOT / '.cache/firmware/target-volumes'
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out.mkdir(parents=True, exist_ok=True)
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with zipfile.ZipFile(args.ipsw) as archive:
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manifest = plistlib.loads(archive.read('BuildManifest.plist'))
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if (manifest['ProductVersion'] != '17.7.11' or manifest['ProductBuildVersion'] != '21H461'
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or 'iPad7,1' not in manifest['SupportedProductTypes']):
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raise SystemExit('Use only the supplied iPad7,1 iPadOS 17.7.11 / 21H461 input')
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identity = next(item for item in manifest['BuildIdentities']
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if item['Info']['DeviceClass'] == 'j120ap' and item['Info']['RestoreBehavior'] == 'Erase'
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and int(item['ApChipID'], 16) == 0x8011 and int(item['ApBoardID'], 16) == 12)
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component = identity['Manifest'][args.component]
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member = component['Info']['Path']
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entry = archive.getinfo(member)
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destination = out / Path(member).name
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if destination.exists():
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raise SystemExit(f'Input already exists; inspect its saved hash before replacing: {destination.name}')
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temporary = destination.with_suffix('.partial')
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digest = hashlib.sha256()
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count = 0
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try:
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with archive.open(entry) as source, temporary.open('xb') as target:
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while chunk := source.read(8 * 1024 * 1024):
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target.write(chunk)
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digest.update(chunk)
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count += len(chunk)
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if count != entry.file_size:
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raise SystemExit('Incomplete volume extraction')
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temporary.rename(destination)
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finally:
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temporary.unlink(missing_ok=True)
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report = {'product': 'iPad7,1', 'board': 'j120ap', 'version': manifest['ProductVersion'],
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'build': manifest['ProductBuildVersion'], 'identity': 'Erase', 'component': args.component,
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'member': member, 'size': count, 'sha256': digest.hexdigest(),
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'zip_crc_verified': True, 'mounted': False, 'userspace_boot_demonstrated': False}
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destination.with_suffix('.json').write_text(json.dumps(report, indent=2) + '\n')
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print(json.dumps(report, indent=2))
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