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518
macrecovery.py
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518
macrecovery.py
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#!/usr/bin/env python
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"""
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Gather recovery information for Macs.
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Copyright (c) 2019, vit9696
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"""
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from __future__ import print_function
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import argparse
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import binascii
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import datetime
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import hashlib
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import json
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import linecache
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import os
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import random
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import struct
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import sys
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import textwrap
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import time
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try:
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from urllib.request import Request,HTTPError,urlopen
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from urllib.parse import urlencode,urlparse
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except ImportError:
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from urllib2 import Request,HTTPError,urlopen
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from urllib import urlencode
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from urlparse import urlparse
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SELF_DIR = os.path.dirname(os.path.realpath(__file__))
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RECENT_MAC = 'Mac-7BA5B2D9E42DDD94'
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MLB_ZERO = '00000000000000000'
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MLB_VALID = 'C02749200YGJ803AX'
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MLB_PRODUCT = '00000000000J80300'
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TYPE_SID = 16
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TYPE_K = 64
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TYPE_FG = 64
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INFO_PRODUCT = 'AP'
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INFO_IMAGE_LINK = 'AU'
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INFO_IMAGE_HASH = 'AH'
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INFO_IMAGE_SESS = 'AT'
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INFO_SIGN_LINK = 'CU'
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INFO_SIGN_HASH = 'CH'
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INFO_SIGN_SESS = 'CT'
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INFO_REQURED = [ INFO_PRODUCT, INFO_IMAGE_LINK, INFO_IMAGE_HASH, INFO_IMAGE_SESS,
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INFO_SIGN_LINK, INFO_SIGN_HASH, INFO_SIGN_SESS ]
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def run_query(url, headers, post=None, raw=False):
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if post is not None:
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data = '\n'.join([entry + '=' + post[entry] for entry in post])
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if sys.version_info[0] >= 3:
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data = data.encode('utf-8')
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else:
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data = None
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req = Request(url=url, headers=headers, data=data)
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try:
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response = urlopen(req)
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if raw: return response
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return dict(response.info()), response.read()
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except HTTPError as e:
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print('ERROR: "{}" when connecting to {}'.format(e, url))
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sys.exit(1)
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def generate_id(type, id=None):
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valid_chars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F']
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if id is None:
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return ''.join(random.choice(valid_chars) for i in range(type))
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return id
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def product_mlb(mlb):
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return '00000000000' + mlb[11] + mlb[12] + mlb[13] + mlb[14] + '00'
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def mlb_from_eeee(eeee):
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if len(eeee) != 4:
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print('ERROR: Invalid EEEE code length!')
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sys.exit(1)
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return '00000000000' + eeee + '00'
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def int_from_unsigned_bytes(bytes, byteorder):
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if byteorder == 'little': bytes = bytes[::-1]
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encoded = binascii.hexlify(bytes)
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return int(encoded, 16)
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# zhangyoufu https://gist.github.com/MCJack123/943eaca762730ca4b7ae460b731b68e7#gistcomment-3061078 2021-10-08
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Apple_EFI_ROM_public_key_1 = 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ChunkListHeader = struct.Struct('<4sIBBBxQQQ')
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assert ChunkListHeader.size == 0x24
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Chunk = struct.Struct('<I32s')
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assert Chunk.size == 0x24
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def verify_chunklist(cnkpath):
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with open(cnkpath, 'rb') as f:
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hash_ctx = hashlib.sha256()
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data = f.read(ChunkListHeader.size)
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hash_ctx.update(data)
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magic, header_size, file_version, chunk_method, signature_method, chunk_count, chunk_offset, signature_offset = ChunkListHeader.unpack(data)
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assert magic == b'CNKL'
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assert header_size == ChunkListHeader.size
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assert file_version == 1
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assert chunk_method == 1
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assert signature_method in [1, 2]
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assert chunk_count > 0
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assert chunk_offset == 0x24
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assert signature_offset == chunk_offset + Chunk.size * chunk_count
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for i in range(chunk_count):
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data = f.read(Chunk.size)
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hash_ctx.update(data)
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chunk_size, chunk_sha256 = Chunk.unpack(data)
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yield chunk_size, chunk_sha256
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digest = hash_ctx.digest()
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if signature_method == 1:
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data = f.read(256)
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assert len(data) == 256
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signature = int_from_unsigned_bytes(data, 'little')
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plaintext = 0x1ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff003031300d0609608648016503040201050004200000000000000000000000000000000000000000000000000000000000000000 | int_from_unsigned_bytes(digest, 'big')
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assert pow(signature, 0x10001, Apple_EFI_ROM_public_key_1) == plaintext
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elif signature_method == 2:
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data = f.read(32)
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assert data == digest
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raise RuntimeError('Chunklist missing digital signature')
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else:
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raise NotImplementedError
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assert f.read(1) == b''
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def get_session(args):
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headers = {
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'Host' : 'osrecovery.apple.com',
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'Connection': 'close',
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'User-Agent': 'InternetRecovery/1.0',
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}
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headers, output = run_query('http://osrecovery.apple.com/', headers)
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if args.verbose:
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print('Session headers:')
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for header in headers:
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print('{}: {}'.format(header, headers[header]))
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for header in headers:
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if header.lower() == 'set-cookie':
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cookies = headers[header].split('; ')
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for cookie in cookies:
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if cookie.startswith('session='):
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return cookie
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raise RuntimeError('No session in headers ' + str(headers))
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def get_image_info(session, bid, mlb=MLB_ZERO, diag = False, os_type = 'default', cid=None):
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headers = {
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'Host' : 'osrecovery.apple.com',
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'Connection' : 'close',
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'User-Agent' : 'InternetRecovery/1.0',
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'Cookie' : session,
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'Content-Type': 'text/plain',
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}
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post = {
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'cid': generate_id(TYPE_SID, cid),
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'sn' : mlb,
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'bid': bid,
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'k' : generate_id(TYPE_K),
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'fg' : generate_id(TYPE_FG)
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}
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if diag:
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url = 'http://osrecovery.apple.com/InstallationPayload/Diagnostics'
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else:
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url = 'http://osrecovery.apple.com/InstallationPayload/RecoveryImage'
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post['os'] = os_type
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headers, output = run_query(url, headers, post)
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if sys.version_info[0] >= 3:
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output = output.decode('utf-8')
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info = {}
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for line in output.split('\n'):
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try:
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key, value = line.split(': ')
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info[key] = value
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except:
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continue
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for k in INFO_REQURED:
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if k not in info:
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raise RuntimeError('Missing key ' + k)
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return info
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def save_image(url, sess, filename='', dir=''):
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purl = urlparse(url)
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headers = {
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'Host' : purl.hostname,
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'Connection': 'close',
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'User-Agent': 'InternetRecovery/1.0',
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'Cookie' : '='.join(['AssetToken', sess])
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}
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if filename == '':
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filename = os.path.basename(purl.path)
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if filename.find('/') >= 0 or filename == '':
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raise RuntimeError('Invalid save path ' + filename)
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print('Saving ' + url + ' to ' + filename + '...')
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with open (os.path.join(dir, filename), 'wb') as fh:
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response = run_query(url, headers, raw=True)
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size = 0
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while True:
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chunk = response.read(2**20)
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if not chunk:
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break
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fh.write(chunk)
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size += len(chunk)
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print('\r{} MBs downloaded...'.format(size / (2**20)), end='')
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sys.stdout.flush()
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print('\rDownload complete! ')
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return os.path.join(dir, os.path.basename(filename))
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def verify_image(dmgpath, cnkpath):
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print('Verifying image with chunklist...')
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with open (dmgpath, 'rb') as dmgf:
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cnkcount = 0
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for cnksize, cnkhash in verify_chunklist(cnkpath):
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cnkcount += 1
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print('\rChunk {} ({} bytes)'.format(cnkcount, cnksize), end='')
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sys.stdout.flush()
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cnk = dmgf.read(cnksize)
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if len(cnk) != cnksize:
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raise RuntimeError('Invalid chunk {} size: expected {}, read {}'.format(cnkcount, cnksize, len(cnk)))
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if hashlib.sha256(cnk).digest() != cnkhash:
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raise RuntimeError('Invalid chunk {}: hash mismatch'.format(cnkcount))
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if dmgf.read(1) != b'':
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raise RuntimeError('Invalid image: larger than chunklist')
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print('\rImage verification complete! ')
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def action_download(args):
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"""
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Reference information for queries:
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Recovery latest:
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cid=3076CE439155BA14
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sn=...
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bid=Mac-E43C1C25D4880AD6
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k=4BE523BB136EB12B1758C70DB43BDD485EBCB6A457854245F9E9FF0587FB790C
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os=latest
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fg=B2E6AA07DB9088BE5BDB38DB2EA824FDDFB6C3AC5272203B32D89F9D8E3528DC
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Recovery default:
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cid=4A35CB95FF396EE7
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sn=...
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bid=Mac-E43C1C25D4880AD6
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k=0A385E6FFC3DDD990A8A1F4EC8B98C92CA5E19C9FF1DD26508C54936D8523121
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os=default
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fg=B2E6AA07DB9088BE5BDB38DB2EA824FDDFB6C3AC5272203B32D89F9D8E3528DC
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Diagnostics:
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cid=050C59B51497CEC8
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sn=...
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bid=Mac-E43C1C25D4880AD6
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k=37D42A8282FE04A12A7D946304F403E56A2155B9622B385F3EB959A2FBAB8C93
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fg=B2E6AA07DB9088BE5BDB38DB2EA824FDDFB6C3AC5272203B32D89F9D8E3528DC
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"""
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session = get_session(args)
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info = get_image_info(session, bid=args.board_id, mlb=args.mlb,
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diag=args.diagnostics, os_type=args.os_type)
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if args.verbose:
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print(info)
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print('Downloading ' + info[INFO_PRODUCT] + '...')
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dmgname = '' if args.basename == '' else args.basename + '.dmg'
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dmgpath = save_image(info[INFO_IMAGE_LINK], info[INFO_IMAGE_SESS], dmgname, args.outdir)
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cnkname = '' if args.basename == '' else args.basename + '.chunklist'
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cnkpath = save_image(info[INFO_SIGN_LINK], info[INFO_SIGN_SESS], cnkname, args.outdir)
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try:
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verify_image(dmgpath, cnkpath)
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return 0
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except Exception as err:
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if isinstance(err, AssertionError) and str(err)=='':
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try:
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tb = sys.exc_info()[2]
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while tb.tb_next:
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tb = tb.tb_next
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err = linecache.getline(tb.tb_frame.f_code.co_filename, tb.tb_lineno, tb.tb_frame.f_globals).strip()
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except:
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err = "Invalid chunklist"
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print('\rImage verification failed. ({})'.format(err))
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return 1
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def action_selfcheck(args):
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"""
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Sanity check server logic for recovery:
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if not valid(bid):
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return error()
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ppp = get_ppp(sn)
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if not valid(ppp):
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return latest_recovery(bid = bid) # Returns newest for bid.
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if valid(sn):
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if os == 'default':
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return default_recovery(sn = sn, ppp = ppp) # Returns oldest for sn.
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else:
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return latest_recovery(sn = sn, ppp = ppp) # Returns newest for sn.
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return default_recovery(ppp = ppp) # Returns oldest.
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"""
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session = get_session(args)
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valid_default = get_image_info(session, bid=RECENT_MAC, mlb=MLB_VALID,
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diag=False, os_type='default')
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valid_latest = get_image_info(session, bid=RECENT_MAC, mlb=MLB_VALID,
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diag=False, os_type='latest')
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product_default = get_image_info(session, bid=RECENT_MAC, mlb=MLB_PRODUCT,
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diag=False, os_type='default')
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product_latest = get_image_info(session, bid=RECENT_MAC, mlb=MLB_PRODUCT,
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diag=False, os_type='latest')
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generic_default = get_image_info(session, bid=RECENT_MAC, mlb=MLB_ZERO,
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diag=False, os_type='default')
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generic_latest = get_image_info(session, bid=RECENT_MAC, mlb=MLB_ZERO,
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diag=False, os_type='latest')
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if args.verbose:
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print(valid_default)
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print(valid_latest)
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print(product_default)
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print(product_latest)
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print(generic_default)
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print(generic_latest)
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if valid_default[INFO_PRODUCT] == valid_latest[INFO_PRODUCT]:
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# Valid MLB must give different default and latest if this is not a too new product.
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print('ERROR: Cannot determine any previous product, got {}'.format(valid_default[INFO_PRODUCT]))
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return 1
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if product_default[INFO_PRODUCT] != product_latest[INFO_PRODUCT]:
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# Product-only MLB must give the same value for default and latest.
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print('ERROR: Latest and default do not match for product MLB, got {} and {}'.format(
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product_default[INFO_PRODUCT], product_latest[INFO_PRODUCT]))
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return 1
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if generic_default[INFO_PRODUCT] != generic_latest[INFO_PRODUCT]:
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# Zero MLB always give the same value for default and latest.
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print('ERROR: Generic MLB gives different product, got {} and {}'.format(
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generic_default[INFO_PRODUCT], generic_latest[INFO_PRODUCT]))
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return 1
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if valid_latest[INFO_PRODUCT] != generic_latest[INFO_PRODUCT]:
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# Valid MLB must always equal generic MLB.
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print('ERROR: Cannot determine unified latest product, got {} and {}'.format(
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valid_latest[INFO_PRODUCT], generic_latest[INFO_PRODUCT]))
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return 1
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if product_default[INFO_PRODUCT] != valid_default[INFO_PRODUCT]:
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# Product-only MLB can give the same value with valid default MLB.
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# This is not an error for all models, but for our chosen code it is.
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print('ERROR: Valid and product MLB give mismatch, got {} and {}'.format(
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product_default[INFO_PRODUCT], valid_default[INFO_PRODUCT]))
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return 1
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print('SUCCESS: Found no discrepancies with MLB validation algorithm!')
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return 0
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def action_verify(args):
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"""
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Try to verify MLB serial number.
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"""
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session = get_session(args)
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generic_latest = get_image_info(session, bid=RECENT_MAC, mlb=MLB_ZERO,
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diag=False, os_type='latest')
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uvalid_default = get_image_info(session, bid=args.board_id, mlb=args.mlb,
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diag=False, os_type='default')
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uvalid_latest = get_image_info(session, bid=args.board_id, mlb=args.mlb,
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diag=False, os_type='latest')
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uproduct_default = get_image_info(session, bid=args.board_id, mlb=product_mlb(args.mlb),
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diag=False, os_type='default')
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if args.verbose:
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print(generic_latest)
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print(uvalid_default)
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print(uvalid_latest)
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print(uproduct_default)
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# Verify our MLB number.
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if uvalid_default[INFO_PRODUCT] != uvalid_latest[INFO_PRODUCT]:
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if uvalid_latest[INFO_PRODUCT] == generic_latest[INFO_PRODUCT]:
|
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print('SUCCESS: {} MLB looks valid and supported!'.format(args.mlb))
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else:
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print('SUCCESS: {} MLB looks valid, but probably unsupported!'.format(args.mlb))
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return 0
|
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print('UNKNOWN: Run selfcheck, check your board-id, or try again later!')
|
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# Here we have matching default and latest products. This can only be true for very
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# new models. These models get either latest or special builds.
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if uvalid_default[INFO_PRODUCT] == generic_latest[INFO_PRODUCT]:
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print('UNKNOWN: {} MLB can be valid if very new!'.format(args.mlb))
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return 0
|
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if uproduct_default[INFO_PRODUCT] != uvalid_default[INFO_PRODUCT]:
|
||||
print('UNKNOWN: {} MLB looks invalid, other models use product {} instead of {}!'.format(
|
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args.mlb, uproduct_default[INFO_PRODUCT], uvalid_default[INFO_PRODUCT]))
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||||
return 0
|
||||
print('UNKNOWN: {} MLB can be valid if very new and using special builds!'.format(args.mlb))
|
||||
return 0
|
||||
|
||||
def action_guess(args):
|
||||
"""
|
||||
Attempt to guess which model does this MLB belong.
|
||||
"""
|
||||
|
||||
mlb = args.mlb
|
||||
anon = mlb.startswith('000')
|
||||
|
||||
with open(args.board_db, 'r') as fh:
|
||||
db = json.load(fh)
|
||||
|
||||
supported = {}
|
||||
|
||||
session = get_session(args)
|
||||
|
||||
generic_latest = get_image_info(session, bid=RECENT_MAC, mlb=MLB_ZERO,
|
||||
diag=False, os_type='latest')
|
||||
|
||||
for model in db:
|
||||
try:
|
||||
if anon:
|
||||
# For anonymous lookup check when given model does not match latest.
|
||||
model_latest = get_image_info(session, bid=model, mlb=MLB_ZERO,
|
||||
diag=False, os_type='latest')
|
||||
|
||||
if model_latest[INFO_PRODUCT] != generic_latest[INFO_PRODUCT]:
|
||||
if db[model] == 'current':
|
||||
print('WARN: Skipped {} due to using latest product {} instead of {}'.format(
|
||||
model, model_latest[INFO_PRODUCT], generic_latest[INFO_PRODUCT]))
|
||||
continue
|
||||
|
||||
user_default = get_image_info(session, bid=model, mlb=mlb,
|
||||
diag=False, os_type='default')
|
||||
|
||||
if user_default[INFO_PRODUCT] != generic_latest[INFO_PRODUCT]:
|
||||
supported[model] = [db[model], user_default[INFO_PRODUCT], generic_latest[INFO_PRODUCT]]
|
||||
else:
|
||||
# For normal lookup check when given model has mismatching normal and latest.
|
||||
user_latest = get_image_info(session, bid=model, mlb=mlb,
|
||||
diag=False, os_type='latest')
|
||||
|
||||
user_default = get_image_info(session, bid=model, mlb=mlb,
|
||||
diag=False, os_type='default')
|
||||
|
||||
if user_latest[INFO_PRODUCT] != user_default[INFO_PRODUCT]:
|
||||
supported[model] = [db[model], user_default[INFO_PRODUCT], user_latest[INFO_PRODUCT]]
|
||||
|
||||
except Exception as e:
|
||||
print('WARN: Failed to check {}, exception: {}'.format(model, str(e)))
|
||||
|
||||
if len(supported) > 0:
|
||||
print('SUCCESS: MLB {} looks supported for:'.format(mlb))
|
||||
for model in supported:
|
||||
print('- {}, up to {}, default: {}, latest: {}'.format(model, supported[model][0],
|
||||
supported[model][1], supported[model][2]))
|
||||
return 0
|
||||
|
||||
print('UNKNOWN: Failed to determine supported models for MLB {}!'.format(mlb))
|
||||
|
||||
def main():
|
||||
parser = argparse.ArgumentParser(description='Gather recovery information for Macs')
|
||||
parser.add_argument('action', choices = ['download', 'selfcheck', 'verify', 'guess'],
|
||||
help='Action to perform: "download" - performs recovery downloading,'
|
||||
' "selfcheck" checks whether MLB serial validation is possible, "verify" performs'
|
||||
' MLB serial verification, "guess" tries to find suitable mac model for MLB.')
|
||||
parser.add_argument('-o', '--outdir', type=str, default=os.getcwd(),
|
||||
help='customise output directory for downloading, defaults to current directory')
|
||||
parser.add_argument('-n', '--basename', type=str, default='',
|
||||
help='customise base name for downloading, defaults to remote name')
|
||||
parser.add_argument('-b', '--board-id', type=str, default=RECENT_MAC,
|
||||
help='use specified board identifier for downloading, defaults to ' + RECENT_MAC)
|
||||
parser.add_argument('-m', '--mlb', type=str, default=MLB_ZERO,
|
||||
help='use specified logic board serial for downloading, defaults to ' + MLB_ZERO)
|
||||
parser.add_argument('-e', '--code', type=str, default='',
|
||||
help='generate product logic board serial with specified product EEEE code')
|
||||
parser.add_argument('-os', '--os-type', type=str, default='default', choices = ['default', 'latest'],
|
||||
help='use specified os type, defaults to default ' + MLB_ZERO)
|
||||
parser.add_argument('-diag', '--diagnostics', action='store_true', help='download diagnostics image')
|
||||
parser.add_argument('-v', '--verbose', action='store_true', help='print debug information')
|
||||
parser.add_argument('-db', '--board-db', type=str, default=os.path.join(SELF_DIR, 'boards.json'),
|
||||
help='use custom board list for checking, defaults to boards.json')
|
||||
|
||||
args = parser.parse_args()
|
||||
|
||||
if args.code != '':
|
||||
args.mlb = mlb_from_eeee(args.code)
|
||||
|
||||
if len(args.mlb) != 17:
|
||||
print('ERROR: Cannot use MLBs in non 17 character format!')
|
||||
sys.exit(1)
|
||||
|
||||
if args.action == 'download':
|
||||
return action_download(args)
|
||||
elif args.action == 'selfcheck':
|
||||
return action_selfcheck(args)
|
||||
elif args.action == 'verify':
|
||||
return action_verify(args)
|
||||
elif args.action == 'guess':
|
||||
return action_guess(args)
|
||||
else:
|
||||
assert(False)
|
||||
|
||||
if __name__ == '__main__':
|
||||
sys.exit(main())
|
||||
Loading…
Reference in a new issue