Issue 5752 - Removing safari support

xarfile.py

-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-import re
-import struct
-import time
-import zlib
-
-from Crypto.Hash import SHA
-from Crypto.PublicKey import RSA
-from Crypto.Signature import PKCS1_v1_5
-
-from buildtools.packager import getTemplate
-
-XAR_HEADER = struct.Struct('>IHHQQI')
-XAR_HEADER_MAGIC = 0x78617221
-XAR_VERSION = 1
-XAR_CKSUM_SHA1 = 1
-
-
-def read_certificates_and_key(keyfile):
-    with open(keyfile, 'r') as file:
-        data = file.read()
-
-    certificates = []
-    key = None
-    for match in re.finditer(r'-+BEGIN (.*?)-+(.*?)-+END \1-+', data, re.S):
-        section = match.group(1)
-        if section == 'CERTIFICATE':
-            certificates.append(re.sub(r'\s+', '', match.group(2)))
-        elif section == 'PRIVATE KEY':
-            key = RSA.importKey(match.group(0))
-    if not key:
-        raise Exception('Could not find private key in file')
-
-    return certificates, key
-
-
-def get_checksum(data):
-    return SHA.new(data).digest()
-
-
-def get_hexchecksum(data):
-    return SHA.new(data).hexdigest()
-
-
-def get_signature(key, data):
-    return PKCS1_v1_5.new(key).sign(SHA.new(data))
-
-
-def compress_files(filedata, root, offset):
-    compressed_data = []
-    filedata = sorted(filedata.iteritems())
-    directory_stack = [('', root)]
-    file_id = 1
-    for path, data in filedata:
-        # Remove directories that are done
-        while not path.startswith(directory_stack[-1][0]):
-            directory_stack.pop()
-
-        # Add new directories
-        directory_path = directory_stack[-1][0]
-        relpath = path[len(directory_path):]
-        while '/' in relpath:
-            name, relpath = relpath.split('/', 1)
-            directory_path += name + '/'
-            directory = {
-                'id': file_id,
-                'name': name,
-                'type': 'directory',
-                'mode': '0755',
-                'children': [],
-            }
-            file_id += 1
-            directory_stack[-1][1].append(directory)
-            directory_stack.append((directory_path, directory['children']))
-
-        # Add the actual file
-        compressed = zlib.compress(data, 9)
-        file = {
-            'id': file_id,
-            'name': relpath,
-            'type': 'file',
-            'mode': '0644',
-            'checksum_uncompressed': get_hexchecksum(data),
-            'size_uncompressed': len(data),
-            'checksum_compressed': get_hexchecksum(compressed),
-            'size_compressed': len(compressed),
-            'offset': offset,
-        }
-        file_id += 1
-        offset += len(compressed)
-        directory_stack[-1][1].append(file)
-        compressed_data.append(compressed)
-    return compressed_data
-
-
-def create(archivepath, contents, keyfile):
-    certificates, key = read_certificates_and_key(keyfile)
-    checksum_length = len(get_checksum(''))
-    params = {
-        'certificates': certificates,
-
-        # Timestamp epoch starts at 2001-01-01T00:00:00.000Z
-        'timestamp_numerical': time.time() - 978307200,
-        'timestamp_iso': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()),
-
-        'checksum': {
-            'offset': 0,
-            'size': checksum_length,
-        },
-        'signature': {
-            'offset': checksum_length,
-            'size': len(get_signature(key, '')),
-        },
-        'files': [],
-    }
-
-    offset = params['signature']['offset'] + params['signature']['size']
-    compressed_data = compress_files(contents, params['files'], offset)
-
-    template = getTemplate('xartoc.xml.tmpl', autoEscape=True)
-    toc_uncompressed = template.render(params).encode('utf-8')
-    toc_compressed = zlib.compress(toc_uncompressed, 9)
-
-    with open(archivepath, 'wb') as file:
-        # The file starts with a minimalistic header
-        file.write(XAR_HEADER.pack(XAR_HEADER_MAGIC, XAR_HEADER.size,
-                                   XAR_VERSION, len(toc_compressed),
-                                   len(toc_uncompressed), XAR_CKSUM_SHA1))
-
-        # It's followed up with a compressed XML table of contents
-        file.write(toc_compressed)
-
-        # Now the actual data, all the offsets are in the table of contents
-        file.write(get_checksum(toc_compressed))
-        file.write(get_signature(key, toc_compressed))
-        for blob in compressed_data:
-            file.write(blob)