Cross Reference: /fuchsia/zircon/third_party/tools/android/avb/avbtool

1781     magic: Magic for identifying the footer, see |MAGIC|.
1782     version_major: The major version of avbtool that wrote the footer.
1783     version_minor: The minor version of avbtool that wrote the footer.
1801     """Initializes a new footer object.
1807       LookupError: If the given footer is malformed.
1808       struct.error: If the given data has no footer.
1817         raise LookupError('Given data does not look like a AVB footer.')
1827     """Gets a string representing the binary encoding of the footer.
1830       A bytearray() with a binary representation of the footer.
1986       image_filename: File to extract vbmeta data from (with a footer).
1990       AvbError: If there's no footer in the image.
1994     (footer, _, _, _) = self._parse_image(image)
1996     if not footer:
1997       raise AvbError('Given image does not have a footer.')
1999     image.seek(footer.vbmeta_offset)
2000     vbmeta_blob = image.read(footer.vbmeta_size)
2012       image_filename: File to erase a footer from.
2016       AvbError: If there's no footer in the image.
2021     (footer, _, descriptors, _) = self._parse_image(image)
2023     if not footer:
2024       raise AvbError('Given image does not have a footer.')
2028       new_image_size = footer.original_image_size
2054       image_filename: File with footer to resize.
2058       AvbError: If there's no footer in the image.
2068     (footer, vbmeta_header, descriptors, _) = self._parse_image(image)
2070     if not footer:
2071       raise AvbError('Given image does not have a footer.')
2074     # image amounts to just moving the footer around.
2076     vbmeta_end_offset = footer.vbmeta_offset + footer.vbmeta_size
2093     # Just reuse the same footer - only difference is that we're
2095     footer_blob = footer.encode()
2146     (footer, header, descriptors, image_size) = self._parse_image(image)
2148     if footer:
2149       o.write('Footer version:           {}.{}\n'.format(footer.version_major,
2150                                                          footer.version_minor))
2153           footer.original_image_size))
2154       o.write('VBMeta offset:            {}\n'.format(footer.vbmeta_offset))
2155       o.write('VBMeta size:              {} bytes\n'.format(footer.vbmeta_size))
2217     (footer, header, descriptors, image_size) = self._parse_image(image)
2219     if footer:
2220       offset = footer.vbmeta_offset
2240     if footer:
2241       print ('vbmeta: Successfully verified footer and {} vbmeta struct in {}'
2283     (footer, header, descriptors, image_size) = self._parse_image(image)
2285     if footer:
2286       offset = footer.vbmeta_offset
2357     The image can either be a vbmeta or an image with a footer.
2360       image: An ImageHandler (vbmeta or footer) with a hashtree descriptor.
2364       is no footer on the image), the second argument is a
2370     footer = None
2373       footer = AvbFooter(image.read(AvbFooter.SIZE))
2379     if footer:
2380       vbmeta_offset = footer.vbmeta_offset
2391     return footer, h, descriptors, image.image_size
2396     The image can either be a vbmeta.img or an image with a footer.
2399       image: An ImageHandler (vbmeta or footer).
2405     footer = None
2408       footer = AvbFooter(image.read(AvbFooter.SIZE))
2414     if footer:
2415       vbmeta_offset = footer.vbmeta_offset
2488       image: An ImageHandler (vbmeta or footer) with a hashtree descriptor.
2851       image_filename: File to add the footer to.
2865     # If there's already a footer, truncate the image to its original
2870         footer = AvbFooter(image.read(AvbFooter.SIZE))
2871         # Existing footer found. Just truncate.
2872         original_image_size = footer.original_image_size
2873         image.truncate(footer.original_image_size)
2877       # Image size is too small to possibly contain a footer.
2896       # footer.
2902       # Append vbmeta blob and footer
2911       # Generate the Footer that tells where the VBMeta footer
2912       # is. Also put enough padding in the front of the footer since
2914       footer = AvbFooter()
2915       footer.original_image_size = original_image_size
2916       footer.vbmeta_offset = vbmeta_offset
2917       footer.vbmeta_size = len(vbmeta_blob)
2918       footer_blob = footer.encode()
2943       image_filename: File to add the footer to.
2961       calc_max_image_size: Don't store the footer - instead calculate the
2988     # this size + metadata (footer + vbmeta struct) fits in
3009     # If there's already a footer, truncate the image to its original
3015         footer = AvbFooter(image.read(AvbFooter.SIZE))
3016         # Existing footer found. Just truncate.
3017         original_image_size = footer.original_image_size
3018         image.truncate(footer.original_image_size)
3022       # Image size is too small to possibly contain a footer.
3066       # Generate the VBMeta footer.
3080       # Append vbmeta blob and footer, unless requested not to.
3093         # footer.
3108         # Generate the Footer that tells where the VBMeta footer
3109         # is. Also put enough padding in the front of the footer since
3111         footer = AvbFooter()
3112         footer.original_image_size = original_image_size
3113         footer.vbmeta_offset = vbmeta_offset
3114         footer.vbmeta_size = len(vbmeta_blob)
3115         footer_blob = footer.encode()
3146       image_filename: File to add the footer to.
3169       calc_max_image_size: Don't store the hashtree or footer - instead
3199     # size such that an image this size + the hashtree + metadata (footer +
3233     # If there's already a footer, truncate the image to its original
3239         footer = AvbFooter(image.read(AvbFooter.SIZE))
3240         # Existing footer found. Just truncate.
3241         original_image_size = footer.original_image_size
3242         image.truncate(footer.original_image_size)
3246       # Image size is too small to possibly contain a footer.
3339       # Generate the VBMeta footer and add padding as needed.
3356       # Append vbmeta blob and footer, unless requested not to.
3366         # Generate the Footer that tells where the VBMeta footer
3367         # is. Also put enough padding in the front of the footer since
3369         footer = AvbFooter()
3370         footer.original_image_size = original_image_size
3371         footer.vbmeta_offset = vbmeta_offset
3372         footer.vbmeta_size = len(vbmeta_blob)
3373         footer_blob = footer.encode()
3650     raise ValueError('Unexpected magic in FEC footer')
3786                             help=('Don\'t store the footer - '
3874                                        help='Add hashes and footer to image.')
3890                             help=('Don\'t store the footer - '
3899                             help=('Do not append vbmeta struct or footer '
3921                                        help='Add hashtree and footer to image.')
3957                             help=('Don\'t store the hashtree or footer - '
3967                             help=('Do not append vbmeta struct or footer '
3981                                        help='Erase footer from an image.')
3983                             help='Image with a footer',
3992                                        help='Extracts vbmeta from an image with a footer.')
3994                             help='Image with footer',
4009                                        help='Resize image with a footer.')
4011                             help='Image with a footer',
4021         help='Show information about vbmeta or footer.')