1035   FORMAT_STRING = ('!QQ')  # tag, num_bytes_following (descriptor header)  variable in AvbDescriptor
1046     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1050           struct.unpack(self.FORMAT_STRING, data[0:self.SIZE]))
1079     desc = struct.pack(self.FORMAT_STRING, self.tag, nbf_with_padding)
1111   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbPropertyDescriptor
1125     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1129        value_size) = struct.unpack(self.FORMAT_STRING, data[0:self.SIZE])
1162     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1208   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbHashtreeDescriptor
1235     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1242        root_digest_len, self.flags, _) = struct.unpack(self.FORMAT_STRING,
1317     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1392   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbHashDescriptor
1411     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1416        digest_len, self.flags, _) = struct.unpack(self.FORMAT_STRING,
1472     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1522   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbKernelCmdlineDescriptor
1539     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1543           struct.unpack(self.FORMAT_STRING, data[0:self.SIZE]))
1579     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1614   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbChainPartitionDescriptor
1630     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1635        public_key_len, _) = struct.unpack(self.FORMAT_STRING, data[0:self.SIZE])
1679     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1776   FORMAT_STRING = ('!4s2L'  # magic, 2 x version.  variable in AvbFooter
1792     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1797        self.vbmeta_size) = struct.unpack(self.FORMAT_STRING, data)
1814     return struct.pack(self.FORMAT_STRING, self.magic, self.version_major,
1835   FORMAT_STRING = ('!4s2L'  # magic, 2 x version  variable in AvbVBMetaHeader
1858     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1871        self.release_string) = struct.unpack(self.FORMAT_STRING, data)
1918         self.FORMAT_STRING, self.magic, self.required_libavb_version_major,
1933     return struct.pack(self.FORMAT_STRING, self.magic,