def zip_test(self, f, compression):
# Create the ZIP archive
with zipfile_aes.AESZipFile(f, "w", compression,
allowZip64=True) as zipfp:
self.start_encryption(zipfp)
zipfp.write(TESTFN, "another.name")
zipfp.write(TESTFN, TESTFN)
zipfp.writestr("strfile", self.data)
# Read the ZIP archive
with zipfile_aes.AESZipFile(f, "r", compression) as zipfp:
self.set_pwd_if_needed(zipfp)
self.assertEqual(zipfp.read(TESTFN), self.data)
self.assertEqual(zipfp.read("another.name"), self.data)
self.assertEqual(zipfp.read("strfile"), self.data)
# Print the ZIP directory
fp = io.StringIO()
zipfp.printdir(fp)
directory = fp.getvalue()
lines = directory.splitlines()
self.assertEqual(len(lines), 4) # Number of files + header
self.assertIn('File Name', lines[0])
self.assertIn('Modified', lines[0])
self.assertIn('Size', lines[0])
fn, date, time_, size = lines[1].split()
self.assertEqual(fn, 'another.name')
self.assertTrue(time.strptime(date, '%Y-%m-%d'))
self.assertTrue(time.strptime(time_, '%H:%M:%S'))
self.assertEqual(size, str(len(self.data)))
# Check the namelist
names = zipfp.namelist()
self.assertEqual(len(names), 3)
self.assertIn(TESTFN, names)
self.assertIn("another.name", names)
self.assertIn("strfile", names)
# Check infolist
infos = zipfp.infolist()
names = [i.filename for i in infos]
self.assertEqual(len(names), 3)
self.assertIn(TESTFN, names)
self.assertIn("another.name", names)
self.assertIn("strfile", names)
for i in infos:
self.assertEqual(i.file_size, len(self.data))
# check getinfo
for nm in (TESTFN, "another.name", "strfile"):
info = zipfp.getinfo(nm)
self.assertEqual(info.filename, nm)
self.assertEqual(info.file_size, len(self.data))
# Check that testzip doesn't raise an exception
zipfp.testzip()
def test_absolute_arcnames(self):
with zipfile_aes.AESZipFile(TESTFN2, "w", zipfile.ZIP_STORED,
allowZip64=True) as zipfp:
self.start_encryption(zipfp)
zipfp.write(TESTFN, "/absolute")
with zipfile_aes.AESZipFile(TESTFN2, "r", zipfile.ZIP_STORED) as zipfp:
self.set_pwd_if_needed(zipfp)
self.assertEqual(zipfp.namelist(), ["absolute"])
def test_read_password_required(self):
"""Not supplying a password when decrypting raises a RuntimeError"""
fname = TESTFN
pwd = b'passwd'
with zipfile_aes.AESZipFile(fname, "w") as zipfp:
zipfp.setpassword(pwd)
zipfp.setencryption(zipfile_aes.WZ_AES)
zipfp.writestr('test.txt', 'content')
with zipfile_aes.AESZipFile(fname) as zipfp:
self.assertRaises(RuntimeError, zipfp.read, 'test.txt')
def do_test_aes_strength(self, nbits):
"""Providing an `nbits` encryption kwarg changes the encryption strength.
Checks that we can encrypt then decrypt and that the compressed size is
as expected for the varying salt length.
"""
fname = TESTFN
pwd = b'passwd'
content_fname = 'test.txt'
content = b'content'
with zipfile_aes.AESZipFile(fname, "w") as zipfp:
zipfp.setpassword(pwd)
zipfp.setencryption(
zipfile_aes.WZ_AES,
nbits=nbits
)
with zipfp.open(content_fname, 'w') as zopen:
zopen.write(content)
salt_lengths = {
128: 8,
192: 12,
256: 16,
}
def expected_compress_size(content, nbits):
"""Computes the expected compress_size for a STORED file for nbits
encryption."""
return (
len(content)
+ salt_lengths[nbits]
+ 2 # pwd_verify_length
+ 10 # mac_length
)
expected_strength = {
128: 1,
192: 2,
256: 3,
}
with zipfile_aes.AESZipFile(fname) as zipfp:
zinfo = zipfp.NameToInfo[content_fname]
zipfp.setpassword(pwd)
read_content = zipfp.read(content_fname)
self.assertEqual(content, read_content)
self.assertEqual(zinfo.wz_aes_strength, expected_strength[nbits])
self.assertEqual(
zinfo.compress_size,
expected_compress_size(content, nbits)
)
def test_decrypt_bad_crc_ae2(self):
"""Decrypting an encrypted AE-2 with an incorrect non-zero CRC raises
BadZipFile.
CRC is not supposed to be used for AE-2 encryption and should be set
to 0 but in the case where it is provided, let's make sure it matches.
"""
bad_crc_ae_2_data = (
b'PK\x03\x04\x14\x00\x01\x00c\x00\x00\x00!\x00&[<0C\x00\x00\x00'
b'\'\x00\x00\x00\x08\x00\x0b\x00test.txt\x01\x99\x07\x00\x02\x00AE'
b'\x03\x00\x00\xe5G\xf2Z"[\xd0\xce\x96\xb7\xb3\xf6\x85\x8f|\x05'
b'\xa9\xdaBGz:!\xde\xa6\x9a\xb7\x81A\x8e\x82\xfd)6|\x84\xf93\x0ecU'
b'\xa7\x07v\xe19\x18A\x94GmQ\xc5Y\x12\xb0\x05=\xbb\xd2\x9bi\x873'
b'\xb9\xbd\xf1PK\x01\x02\x14\x03\x14\x00\x01\x00c\x00\x00\x00!\x00'
b'&[<0C\x00\x00\x00\'\x00\x00\x00\x08\x00\x0b\x00\x00\x00\x00\x00'
b'\x00\x00\x00\x00\x80\x01\x00\x00\x00\x00test.txt\x01\x99\x07\x00'
b'\x02\x00AE\x03\x00\x00PK\x05\x06\x00\x00\x00\x00\x01\x00\x01\x00'
b'A\x00\x00\x00t\x00\x00\x00\x00\x00')
fname = TESTFN
with open(fname, "wb") as fp:
fp.write(bad_crc_ae_2_data)
with zipfile_aes.AESZipFile(fname, "r") as zipfp:
exception_msg = "Bad CRC-32 for file %r" % 'test.txt'
with self.assertRaises(zipfile_aes.BadZipFile, msg=exception_msg):
zipfp.read('test.txt', pwd=b'test')
def test_aes_encryption_via_init(self):
fname = TESTFN
pwd = b'passwd'
content_fname = 'test.txt'
content = b'content'
with zipfile_aes.AESZipFile(fname,
mode='w',
encryption=zipfile_aes.WZ_AES) as zipfp:
zipfp.setpassword(pwd)
zipfp.writestr(content_fname, content)
with zipfile_aes.AESZipFile(fname) as zipfp:
zipfp.setpassword(pwd)
read_content = zipfp.read(content_fname)
self.assertEqual(content, read_content)
def test_decrypt_zero_crc_ae2(self):
"""Decrypting an encrypted AE-2 file with 0 CRC.
CRC is not supposed to be used for AE-2 encryption and should be set
to 0.
"""
bad_crc_ae_2_data = (
b'PK\x03\x04\x14\x00\x01\x00c\x00\x00\x00!\x00\x00\x00\x00\x00C\x00\x00\x00'
b'\'\x00\x00\x00\x08\x00\x0b\x00test.txt\x01\x99\x07\x00\x02\x00AE'
b'\x03\x00\x00\xe5G\xf2Z"[\xd0\xce\x96\xb7\xb3\xf6\x85\x8f|\x05'
b'\xa9\xdaBGz:!\xde\xa6\x9a\xb7\x81A\x8e\x82\xfd)6|\x84\xf93\x0ecU'
b'\xa7\x07v\xe19\x18A\x94GmQ\xc5Y\x12\xb0\x05=\xbb\xd2\x9bi\x873'
b'\xb9\xbd\xf1PK\x01\x02\x14\x03\x14\x00\x01\x00c\x00\x00\x00!\x00'
b'\x00\x00\x00\x00C\x00\x00\x00\'\x00\x00\x00\x08\x00\x0b\x00\x00\x00\x00\x00'
b'\x00\x00\x00\x00\x80\x01\x00\x00\x00\x00test.txt\x01\x99\x07\x00'
b'\x02\x00AE\x03\x00\x00PK\x05\x06\x00\x00\x00\x00\x01\x00\x01\x00'
b'A\x00\x00\x00t\x00\x00\x00\x00\x00'
)
fname = TESTFN
with open(fname, "wb") as fp:
fp.write(bad_crc_ae_2_data)
with zipfile_aes.AESZipFile(fname, "r") as zipfp:
content = zipfp.read('test.txt', pwd=b'test')
self.assertEqual(content, b'This is a test file for AES encryption.')
def zip_open_test(self, f, compression):
self.make_test_archive(f, compression)
# Read the ZIP archive
with zipfile_aes.AESZipFile(f, "r", compression) as zipfp:
self.set_pwd_if_needed(zipfp)
zipdata1 = []
with zipfp.open(TESTFN) as zipopen1:
while True:
read_data = zipopen1.read(256)
if not read_data:
break
zipdata1.append(read_data)
zipdata2 = []
with zipfp.open("another.name") as zipopen2:
while True:
read_data = zipopen2.read(256)
if not read_data:
break
zipdata2.append(read_data)
testdata1 = b''.join(zipdata1)
self.assertEqual(len(testdata1), len(self.data))
self.assertEqual(testdata1, self.data)
testdata2 = b''.join(zipdata2)
self.assertEqual(len(testdata2), len(self.data))
self.assertEqual(testdata2, self.data)
def test_append(self):
# Test that appending to the Zip64 archive doesn't change
# extra fields of existing entries.
with zipfile_aes.AESZipFile(TESTFN2, "w", allowZip64=True) as zipfp:
self.start_encryption(zipfp)
zipfp.writestr("strfile", self.data)
with zipfile_aes.AESZipFile(TESTFN2, "r", allowZip64=True) as zipfp:
self.set_pwd_if_needed(zipfp)
zinfo = zipfp.getinfo("strfile")
extra = zinfo.extra
with zipfile_aes.AESZipFile(TESTFN2, "a", allowZip64=True) as zipfp:
self.start_encryption(zipfp)
zipfp.writestr("strfile2", self.data)
with zipfile_aes.AESZipFile(TESTFN2, "r", allowZip64=True) as zipfp:
self.set_pwd_if_needed(zipfp)
zinfo = zipfp.getinfo("strfile")
self.assertEqual(zinfo.extra, extra)
def do_test_force_wz_aes_version(self, force_wz_aes_version):
fname = TESTFN
pwd = b'passwd'
content_fname = 'test.txt'
content = b'content'
with zipfile_aes.AESZipFile(fname, "w") as zipfp:
zipfp.setpassword(pwd)
zipfp.setencryption(zipfile_aes.WZ_AES,
force_wz_aes_version=force_wz_aes_version)
zipfp.writestr(content_fname, content)
with zipfile_aes.AESZipFile(fname) as zipfp:
zinfo = zipfp.NameToInfo[content_fname]
zipfp.setpassword(pwd)
self.assertEqual(zinfo.wz_aes_version, force_wz_aes_version)
read_content = zipfp.read(content_fname)
self.assertEqual(content, read_content)
def test_too_many_files(self):
# This test checks that more than 64k files can be added to an archive,
# and that the resulting archive can be read properly by ZipFile
zipf = zipfile_aes.AESZipFile(TESTFN, "w", self.compression,
allowZip64=True)
zipf.debug = 100
numfiles = 15
for i in range(numfiles):
zipf.writestr("foo%08d" % i, "%d" % (i**3 % 57))
self.assertEqual(len(zipf.namelist()), numfiles)
zipf.close()
zipf2 = zipfile_aes.AESZipFile(TESTFN, "r", self.compression)
self.assertEqual(len(zipf2.namelist()), numfiles)
for i in range(numfiles):
content = zipf2.read("foo%08d" % i).decode('ascii')
self.assertEqual(content, "%d" % (i**3 % 57))
zipf2.close()
def test_write_password_required(self):
"""Not supplying a password when encrypting raises a RuntimeError"""
fname = TESTFN
with zipfile_aes.AESZipFile(fname, "w") as zipfp:
zipfp.setencryption(zipfile_aes.WZ_AES)
with self.assertRaises(RuntimeError,
msg='%s encryption requires a password.' %
zipfile_aes.WZ_AES):
zipfp.open('test', 'w')
def test_too_many_files_append(self):
zipf = zipfile_aes.AESZipFile(TESTFN,
"w",
self.compression,
allowZip64=False)
zipf.debug = 100
numfiles = 9
for i in range(numfiles):
zipf.writestr("foo%08d" % i, "%d" % (i**3 % 57))
self.assertEqual(len(zipf.namelist()), numfiles)
with self.assertRaises(zipfile.LargeZipFile):
zipf.writestr("foo%08d" % numfiles, b'')
self.assertEqual(len(zipf.namelist()), numfiles)
zipf.close()
zipf = zipfile_aes.AESZipFile(TESTFN,
"a",
self.compression,
allowZip64=False)
zipf.debug = 100
self.assertEqual(len(zipf.namelist()), numfiles)
with self.assertRaises(zipfile.LargeZipFile):
zipf.writestr("foo%08d" % numfiles, b'')
self.assertEqual(len(zipf.namelist()), numfiles)
zipf.close()
zipf = zipfile_aes.AESZipFile(TESTFN,
"a",
self.compression,
allowZip64=True)
zipf.debug = 100
self.assertEqual(len(zipf.namelist()), numfiles)
numfiles2 = 15
for i in range(numfiles, numfiles2):
zipf.writestr("foo%08d" % i, "%d" % (i**3 % 57))
self.assertEqual(len(zipf.namelist()), numfiles2)
zipf.close()
zipf2 = zipfile_aes.AESZipFile(TESTFN, "r", self.compression)
self.assertEqual(len(zipf2.namelist()), numfiles2)
for i in range(numfiles2):
content = zipf2.read("foo%08d" % i).decode('ascii')
self.assertEqual(content, "%d" % (i**3 % 57))
zipf2.close()
def test_local_header(self):
"""Local file header contains correct WZ AES information."""
fname = TESTFN
pwd = b'passwd'
content_fname = 'test.txt'
content = b'content'
with zipfile_aes.AESZipFile(
fname,
'w',
encryption=zipfile_aes.WZ_AES
) as zipfp:
zipfp.setpassword(pwd)
zipfp.writestr(content_fname, content)
with zipfile_aes.AESZipFile(fname) as zipfp:
zipfp.setpassword(pwd)
with zipfp.open(zipfp.NameToInfo[content_fname]) as zf:
zf._fileobj.seek(0)
fheader = zf._fileobj.read(zipfile.sizeFileHeader)
fheader = struct.unpack(zipfile.structFileHeader, fheader)
# local header record
self.assertEqual(fheader[4], zipfile_aes.WZ_AES_COMPRESS_TYPE)
# extra info record
fname_len = fheader[-2]
extra_len = fheader[-1]
zf._fileobj.read(fname_len)
extra = zf._fileobj.read(extra_len)
records = []
# Iterate through any extra records which may be present.
while len(extra) >= 4:
tp, ln = struct.unpack('<HH', extra[:4])
if tp == zipfile_aes.EXTRA_WZ_AES:
records.append(extra[4:ln+4])
extra = extra[ln+4:]
# The WZ extra record only appears once.
self.assertEqual(len(records), 1)
counts = struct.unpack("<H2sBH", records[0])
# The local header and central directory extra are the same.
self.assertEqual(zf._zinfo.wz_aes_version, counts[0])
self.assertEqual(zf._zinfo.wz_aes_vendor_id, counts[1])
self.assertEqual(zf._zinfo.wz_aes_strength, counts[2])
self.assertEqual(zf._zinfo.compress_type, counts[3])
def zip_test(self, f, compression):
self.make_test_archive(f, compression)
# Read the ZIP archive
with zipfile_aes.AESZipFile(f, "r", compression) as zipfp:
self.set_pwd_if_needed(zipfp)
testdata = zipfp.read(TESTFN)
self.assertEqual(len(testdata), len(self.data))
self.assertEqual(testdata, self.data)
self.assertEqual(zipfp.read("another.name"), self.data)
def test_aes_encryption_via_init_with_kwargs(self):
fname = TESTFN
pwd = b'passwd'
content_fname = 'test.txt'
content = b'content'
with zipfile_aes.AESZipFile(fname,
'w',
encryption=zipfile_aes.WZ_AES,
encryption_kwargs={'nbits': 128}) as zipfp:
zipfp.setpassword(pwd)
zipfp.writestr(content_fname, content)
with zipfile_aes.AESZipFile(fname) as zipfp:
zipfp.setpassword(pwd)
zinfo = zipfp.NameToInfo[content_fname]
wz_aes_strength = zinfo.wz_aes_strength
read_content = zipfp.read(content_fname)
self.assertEqual(wz_aes_strength, 1)
self.assertEqual(content, read_content)
def make_test_archive(self, f, compression):
# Create the ZIP archive
with zipfile_aes.AESZipFile(f, "w", compression) as zipfp:
if self.encryption:
if self.pwd:
zipfp.setpassword(self.pwd)
if self.encryption_kwargs:
encryption_kwargs = self.encryption_kwargs
else:
encryption_kwargs = {}
zipfp.setencryption(self.encryption, **encryption_kwargs)
zipfp.write(TESTFN, "another.name")
zipfp.write(TESTFN, TESTFN)
def zip_random_open_test(self, f, compression):
self.make_test_archive(f, compression)
# Read the ZIP archive
with zipfile_aes.AESZipFile(f, "r", compression) as zipfp:
self.set_pwd_if_needed(zipfp)
zipdata1 = []
with zipfp.open(TESTFN) as zipopen1:
while True:
read_data = zipopen1.read(randint(1, 1024))
if not read_data:
break
zipdata1.append(read_data)
testdata = b''.join(zipdata1)
self.assertEqual(len(testdata), len(self.data))
self.assertEqual(testdata, self.data)
def test_read_padded_file(self):
"""
Files with LMZA / AES padding should not raise BadZipFile with a HMAC mismatch.
The test file has random content.
"""
pwd = b'passwd'
archive_name = 'padded-when-compressed'
test_zip_path = os.path.join(TEST_DATA_DIR, 'lzma-padded.zip')
with zipfile_aes.AESZipFile(test_zip_path, "r") as zipfp:
zipfp.setencryption(zipfile_aes.WZ_AES)
zipfp.setpassword(pwd)
content = zipfp.open(archive_name).read()
self.assertEqual(len(content), 16184, msg='File size mismatch')
self.assertEqual(content[:4], b'\xcd\x07\x12\xd8')
self.assertEqual(content[-4:], b'\xc9\x8c\x66\x30')
def test_decrypt_known_good(self):
"""Decrypting a known good file works."""
data = (
b'PK\x03\x04\x14\x00\x01\x00c\x00\x00\x00!\x00&[<ZC\x00\x00\x00'
b'\'\x00\x00\x00\x08\x00\x0b\x00test.txt\x01\x99\x07\x00\x01\x00AE'
b'\x03\x00\x00\xe5G\xf2Z"[\xd0\xce\x96\xb7\xb3\xf6\x85\x8f|\x05'
b'\xa9\xdaBGz:!\xde\xa6\x9a\xb7\x81A\x8e\x82\xfd)6|\x84\xf93\x0ecU'
b'\xa7\x07v\xe19\x18A\x94GmQ\xc5Y\x12\xb0\x05=\xbb\xd2\x9bi\x873'
b'\xb9\xbd\xf1PK\x01\x02\x14\x03\x14\x00\x01\x00c\x00\x00\x00!\x00'
b'&[<ZC\x00\x00\x00\'\x00\x00\x00\x08\x00\x0b\x00\x00\x00\x00\x00'
b'\x00\x00\x00\x00\x80\x01\x00\x00\x00\x00test.txt\x01\x99\x07\x00'
b'\x01\x00AE\x03\x00\x00PK\x05\x06\x00\x00\x00\x00\x01\x00\x01\x00'
b'A\x00\x00\x00t\x00\x00\x00\x00\x00')
fname = TESTFN
with open(fname, "wb") as fp:
fp.write(data)
with zipfile_aes.AESZipFile(fname, "r") as zipfp:
content = zipfp.read('test.txt', pwd=b'test')
self.assertEqual(content, b'This is a test file for AES encryption.')
def test_decrypt_bad_hmac_ae1(self):
"""Decrypting an encrypted AE-1 file with a bad HMAC raises BadZipFile"""
data = (
b'PK\x03\x04\x14\x00\x01\x00c\x00\x00\x00!\x00&[<ZC\x00\x00\x00'
b'\'\x00\x00\x00\x08\x00\x0b\x00test.txt\x01\x99\x07\x00\x01\x00AE'
b'\x03\x00\x00\xe5G\xf2Z"[\xd0\xce\x96\xb7\xb3\xf6\x85\x8f|\x05'
b'\xa9\xdaBGz:!\xde\xa6\x9a\xb7\x81A\x8e\x82\xfd)6|\x84\xf93\x0ecU'
b'\xa7\x07v\xe19\x18A\x94GmQ\xc5Y\x12\xb0\x05=\xbb\xd2\x9bi\x873'
b'\xb0\xbd\xf1PK\x01\x02\x14\x03\x14\x00\x01\x00c\x00\x00\x00!\x00'
b'&[<ZC\x00\x00\x00\'\x00\x00\x00\x08\x00\x0b\x00\x00\x00\x00\x00'
b'\x00\x00\x00\x00\x80\x01\x00\x00\x00\x00test.txt\x01\x99\x07\x00'
b'\x01\x00AE\x03\x00\x00PK\x05\x06\x00\x00\x00\x00\x01\x00\x01\x00'
b'A\x00\x00\x00t\x00\x00\x00\x00\x00')
fname = TESTFN
with open(fname, "wb") as fp:
fp.write(data)
with zipfile_aes.AESZipFile(fname, "r") as zipfp:
exception_msg = "Bad HMAC check for file %r" % 'test.txt'
with self.assertRaises(zipfile_aes.BadZipFile, msg=exception_msg):
zipfp.read('test.txt', pwd=b'test')
def test_decrypt_bad_password_fails(self):
"""Decrypting a file with a bad password raises an error."""
data = (
b'PK\x03\x04\x14\x00\x01\x00c\x00\x00\x00!\x00&[<ZC\x00\x00\x00'
b'\'\x00\x00\x00\x08\x00\x0b\x00test.txt\x01\x99\x07\x00\x01\x00AE'
b'\x03\x00\x00\xe5G\xf2Z"[\xd0\xce\x96\xb7\xb3\xf6\x85\x8f|\x05'
b'\x00\xdaBGz:!\xde\xa6\x9a\xb7\x81A\x8e\x82\xfd)6|\x84\xf93\x0ecU'
b'\xa7\x07v\xe19\x18A\x94GmQ\xc5Y\x12\xb0\x05=\xbb\xd2\x9bi\x873'
b'\xb9\xbd\xf1PK\x01\x02\x14\x03\x14\x00\x01\x00c\x00\x00\x00!\x00'
b'&[<ZC\x00\x00\x00\'\x00\x00\x00\x08\x00\x0b\x00\x00\x00\x00\x00'
b'\x00\x00\x00\x00\x80\x01\x00\x00\x00\x00test.txt\x01\x99\x07\x00'
b'\x01\x00AE\x03\x00\x00PK\x05\x06\x00\x00\x00\x00\x01\x00\x01\x00'
b'A\x00\x00\x00t\x00\x00\x00\x00\x00')
fname = TESTFN
with open(fname, "wb") as fp:
fp.write(data)
with zipfile_aes.AESZipFile(fname, "r") as zipfp:
exception_msg = "Bad password for file %r" % fname
with self.assertRaises(RuntimeError, msg=exception_msg):
zipfp.read('test.txt', pwd=b'test')
def test_seek_tell(self):
# Test seek functionality
txt = b"Where's Bruce?"
bloc = txt.find(b"Bruce")
pwd = b'passwd'
# Check seek on a file
with zipfile_aes.AESZipFile(TESTFN, "w") as zipf:
zipf.pwd = pwd
zipf.setencryption(zipfile_aes.WZ_AES, nbits=128)
zipf.writestr("foo.txt", txt)
with zipfile_aes.AESZipFile(TESTFN, "r") as zipf:
zipf.pwd = pwd
with zipf.open("foo.txt", "r") as fp:
fp.seek(bloc, os.SEEK_SET)
self.assertEqual(fp.tell(), bloc)
fp.seek(-bloc, os.SEEK_CUR)
self.assertEqual(fp.tell(), 0)
fp.seek(bloc, os.SEEK_CUR)
self.assertEqual(fp.tell(), bloc)
self.assertEqual(fp.read(5), txt[bloc:bloc + 5])
fp.seek(0, os.SEEK_END)
self.assertEqual(fp.tell(), len(txt))
fp.seek(0, os.SEEK_SET)
self.assertEqual(fp.tell(), 0)
# Check seek on memory file
data = io.BytesIO()
with zipfile_aes.AESZipFile(data, mode="w") as zipf:
zipf.pwd = pwd
zipf.setencryption(zipfile_aes.WZ_AES, nbits=128)
zipf.writestr("foo.txt", txt)
with zipfile_aes.AESZipFile(data, mode="r") as zipf:
zipf.pwd = pwd
with zipf.open("foo.txt", "r") as fp:
fp.seek(bloc, os.SEEK_SET)
self.assertEqual(fp.tell(), bloc)
fp.seek(-bloc, os.SEEK_CUR)
self.assertEqual(fp.tell(), 0)
fp.seek(bloc, os.SEEK_CUR)
self.assertEqual(fp.tell(), bloc)
self.assertEqual(fp.read(5), txt[bloc:bloc + 5])
# Make sure that the second read after seeking back beyond
# _readbuffer returns the same content (ie. rewind to the start of
# the file to read forward to the required position).
old_read_size = fp.MIN_READ_SIZE
fp.MIN_READ_SIZE = 1
fp._readbuffer = b''
fp._offset = 0
fp.seek(0, os.SEEK_SET)
self.assertEqual(fp.tell(), 0)
fp.seek(bloc, os.SEEK_CUR)
self.assertEqual(fp.read(5), txt[bloc:bloc + 5])
fp.MIN_READ_SIZE = old_read_size
fp.seek(0, os.SEEK_END)
self.assertEqual(fp.tell(), len(txt))
fp.seek(0, os.SEEK_SET)
self.assertEqual(fp.tell(), 0)
# Read the file completely to definitely call any eof integrity
# checks (hmac/crc) and make sure they still pass.
fp.read()
def large_file_exception_test2(self, f, compression):
with zipfile_aes.AESZipFile(f, "w", compression,
allowZip64=False) as zipfp:
self.start_encryption(zipfp)
self.assertRaises(zipfile.LargeZipFile, zipfp.writestr,
"another.name", self.data)
