Delete helpers/unpackBackup.py

helpers/unpackBackup.py

@@ -1,116 +0,0 @@
-# ABtoTar.py
-# Change the Android Backup file (*.ab) into a tar for fun and profit.
-# Basically; remove the first 24 bytes and replace them with a tar header.
-# Ed Greybeard 2021
-
-from tarfile import is_tarfile
-import os.path
-import logging
-import argparse
-from sys import exit
-
-AB_HEADER = b"ANDROID BACKUP"
-TAR_HEADER = b"\x1f\x8b\x08\x00\x00\x00\x00\x00"
-IGNORE_OFFSET = 24
-
-
-logging.basicConfig(format='%(asctime)s | %(levelname)s | %(message)s', level='DEBUG')
-
-def extract_tar_from_ab(path_to_ab, output_dir=None):
-    """
-    An AB file is a tar with 8 bytes added to the start.
-    This will extract the tar to the same directory as the AB file unless output_dir is specified.
-    :param path_to_ab:
-    :param output_dir:
-    :return:
-    """
-    if output_dir is None:
-        output_dir = os.path.dirname(path_to_ab)
-
-    # Check we can open the file
-    try:
-        ab_data = open(path_to_ab, 'rb')
-    except:
-        logging.critical(f"Unable to open AB file at {path_to_ab}")
-        return False
-
-    # Check the AB file header is intact
-    ab_bytes_to_remove = ab_data.read(24)
-
-    if ab_bytes_to_remove[:14] == AB_HEADER:
-        logging.info("AB Header checked and intact")
-    else:
-        logging.error("AB Header not found; is it definitely the right file?")
-        return False
-
-    # Open the target tar file
-    output_path = build_tar_filepath(input_path, output_dir)
-
-    try:
-        output_file = open(output_path, 'wb')
-    except:
-        logging.error("Unable to open file at {output_path}")
-        return False
-
-    logging.info("Writing tar header..")
-    output_file.write(TAR_HEADER)
-
-    logging.info("Writing rest of AB file..")
-    output_file.write(ab_data.read())
-
-    logging.info("..done.")
-    logging.info("Closing files..")
-
-    output_file.close()
-    ab_data.close()
-
-    # quick verify
-    try:
-        test_val = is_tarfile(output_path)
-        logging.info("Output verified OK")
-        return True
-    except:
-        logging.error("Verification failed; maybe it's encrypted?")
-        return False
-
-
-def build_tar_filepath(input_path, output_dir):
-    input_filename = os.path.splitext(os.path.basename(input_path))[0]
-    output_filename = f"{input_filename}.tar.gz"
-    logging.info(f"Output filename: {output_filename}")
-    output_filepath = os.path.join(output_dir, output_filename)
-    return output_filepath
-
-
-if __name__ == '__main__':
-    logging.info("-------------------")
-    logging.info("AB to Tar")
-    logging.info("By Greybeard")
-    logging.info("-------------------")
-    logging.info("Global variables:")
-    logging.info(f"AB_HEADER:        {AB_HEADER}")
-    logging.info(f"TAR_HEADER:       {TAR_HEADER}")
-    logging.info(f"BYTES TO IGNORE:  {IGNORE_OFFSET}")
-
-    parser = argparse.ArgumentParser(description="Convert an Android Backup (AB) file to a tar")
-    parser.add_argument('-i', '--input', dest='input_path', type=str, required=True, action='store',
-                        help='AB file')
-    parser.add_argument('-o', '--output', dest='output_dir', type=str, default=None,
-                        help='Output directory (default: same as AB file)')
-
-    args = parser.parse_args()
-
-    input_path = args.input_path
-    output_dir = args.output_dir
-
-    if os.path.exists(input_path) is not True:
-        logging.critical(f"{input_path} not found. Exiting..")
-        exit(1)
-
-    logging.info(f"Input file: {input_path}")
-
-    if extract_tar_from_ab(input_path, output_dir) is True:
-        logging.info("Processing complete.")
-    else:
-        logging.info("Error with processing. Exiting..")
-