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import io
import os
import pathlib
import struct
import zlib
import pytest
from Cryptodome.Cipher import AES
import py7zr
import py7zr.compressor
from tests import p7zip_test
try:
import zstandard as Zstd # type: ignore # noqa
except ImportError:
Zstd = None
try:
import ppmd as Ppmd # type: ignore
except ImportError:
Ppmd = None
testdata_path = pathlib.Path(os.path.dirname(__file__)).joinpath('data')
os.umask(0o022)
@pytest.mark.unit
def test_aes_cipher():
key = b'e\x11\xf1Pz<*\x98*\xe6\xde\xf4\xf6X\x18\xedl\xf2Be\x1a\xca\x19\xd1\\\xeb\xc6\xa6z\xe2\x89\x1d'
iv = b'|&\xae\x94do\x8a4\x00\x00\x00\x00\x00\x00\x00\x00'
indata = b"T\x9f^\xb5\xbf\xdc\x08/\xfe<\xe6i'\x84A^\x83\xdc\xdd5\xe9\xd5\xd0b\xa9\x7fH$\x11\x82\x8d" \
b"\xce[\x85\xe7\xf2}\xe3oJ*\xc0:\xf4\xfd\x82\xe8I"
expected = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2" \
b"\xf7\\m\xe0t\xa6$yF_-\xa0\x0b8f "
cipher = AES.new(key, AES.MODE_CBC, iv)
result = cipher.decrypt(indata)
assert expected == result
@pytest.mark.unit
def test_deflate_compressor():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
plain_data += plain_data
compressor = py7zr.compressor.DeflateCompressor()
outdata = compressor.compress(plain_data)
outdata += compressor.flush()
expected = b'c\xd0\x92\xe2TO\x91\xdc`Q|\xaa[Xa\xbd\x95t\xef\xf4\x1f5\xca\xbe/\x1f\x86_y2\xdd\xc9\xe9\x12\x03\x01y\x00'
assert outdata == expected
@pytest.mark.unit
def test_deflate_compressor_flushed():
with pytest.raises(zlib.error):
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
plain_data += plain_data
compressor = py7zr.compressor.DeflateCompressor()
outdata = compressor.compress(plain_data)
outdata += compressor.flush()
outdata += compressor.flush()
@pytest.mark.unit
def test_deflate_decompressor():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
plain_data += plain_data
source_data = b'c\xd0\x92\xe2TO\x91\xdc`Q|\xaa[Xa\xbd\x95t\xef\xf4\x1f5\xca\xbe/\x1f\x86_y2\xdd\xc9\xe9\x12\x03\x01y\x00'
decompressor = py7zr.compressor.DeflateDecompressor()
outdata = decompressor.decompress(source_data)
assert outdata == plain_data
@pytest.mark.unit
def test_copy_compressor():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
compressor = py7zr.compressor.CopyCompressor()
outdata = compressor.compress(plain_data)
outdata += compressor.flush()
assert outdata == plain_data
@pytest.mark.unit
def test_copy_decompressor():
source_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
decompressor = py7zr.compressor.CopyDecompressor()
outdata = decompressor.decompress(source_data)
assert outdata == source_data
@pytest.mark.unit
@pytest.mark.skipif(Zstd is None, reason="zstd library is not exist.")
def test_zstd_compressor_1():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
compressor = py7zr.compressor.ZstdCompressor()
outdata = compressor.compress(plain_data)
outdata = compressor.compress(plain_data)
outdata += compressor.flush()
compressed = b"\x28\xb5\x2f\xfd" \
b"\x00XE\x01\x00\x04\x02\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4" \
b"\xe4\x97BB\xd2\x01\x00\x18\xb8z\x02"
assert outdata == compressed
@pytest.mark.unit
@pytest.mark.skipif(Zstd is None, reason="zstd library is not exist.")
def test_zstd_decompressor_1():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
plain_data += plain_data
compressed = b"\x28\xb5\x2f\xfd"\
b"\x00XE\x01\x00\x04\x02\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4" \
b"\xe4\x97BB\xd2\x01\x00\x18\xb8z\x02"
property = b'\x01\x04\x04\x00\x00'
decompressor = py7zr.compressor.ZstdDecompressor(property)
outdata = decompressor.decompress(compressed)
assert outdata == plain_data
@pytest.mark.unit
@pytest.mark.skipif(Zstd is None, reason="zstd library is not exist.")
def test_zstd_decompressor_2():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
plain_data += plain_data
compressed_0 = b"\x28\xb5\x2f\xfd"
compressed_1 = b" @E\x01\x00\x04\x02\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4"
compressed_2 = b"\xe4\x97BB\xd2\x01\x00\x18\xb8z\x02"
property = b'\x01\x04\x04\x00\x00'
decompressor = py7zr.compressor.ZstdDecompressor(property)
outdata = decompressor.decompress(compressed_0)
outdata += decompressor.decompress(compressed_1)
outdata += decompressor.decompress(compressed_2)
assert outdata == plain_data
@pytest.mark.unit
@pytest.mark.skipif(Zstd is None, reason="zstd library is not exist.")
def test_zstd_compressor_decompressor():
compressor = py7zr.compressor.ZstdCompressor()
compressed = b''
for i in range(255):
compressed += compressor.compress(struct.Struct(">B").pack(i) * 16384)
compressed += compressor.flush()
assert len(compressed) == 999
assert compressed[0:4] == b"\x28\xb5\x2f\xfd"
property = b'\x01\x04\x04\x00\x00'
decompressor = py7zr.compressor.ZstdDecompressor(property)
extracted = b''
extracted += decompressor.decompress(compressed)
assert len(extracted) == 16384 * 255
assert extracted[:10] == b'\0\0\0\0\0\0\0\0\0\0'
@pytest.mark.unit
def test_sevenzipcompressor_aes_lzma2():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
plain_data += plain_data + plain_data
filters = [
{"id": py7zr.FILTER_LZMA2, "preset": py7zr.PRESET_DEFAULT},
{"id": py7zr.FILTER_CRYPTO_AES256_SHA256}
]
indata = io.BytesIO(plain_data)
outdata = io.BytesIO()
compressor = py7zr.compressor.SevenZipCompressor(filters=filters, password='secret')
insize, outsize, crc = compressor.compress(indata, outdata)
outsize += compressor.flush(outdata)
outdata.seek(0, 0)
coders = compressor.coders
unpacksizes = compressor.unpacksizes
decompressor = py7zr.compressor.SevenZipDecompressor(coders=coders, packsize=outsize, unpacksizes=unpacksizes,
crc=None, password='secret')
revert_data = decompressor.decompress(outdata)
assert revert_data == plain_data
@pytest.mark.unit
def test_aes_compressor():
compressor = py7zr.compressor.AESCompressor('secret')
assert compressor.method == py7zr.properties.CompressionMethod.CRYPT_AES256_SHA256
assert len(compressor.encode_filter_properties()) == 2 + 16
@pytest.mark.unit
def test_sevenzipcompressor_aes_only():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2"
plain_data += plain_data
filters = [
{"id": py7zr.FILTER_CRYPTO_AES256_SHA256}
]
compressor = py7zr.compressor.SevenZipCompressor(filters=filters, password='secret')
indata = io.BytesIO(plain_data)
outdata = io.BytesIO()
_, _, _ = compressor.compress(indata, outdata)
_ = compressor.flush(outdata)
result = outdata.getvalue()
assert len(result) == 64
assert result != plain_data
@pytest.mark.unit
def test_aes_encrypt_data():
plain_data = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB"
plain_data += plain_data + plain_data
compressor = py7zr.compressor.AESCompressor('secret')
outdata = compressor.compress(plain_data)
outdata += compressor.flush()
assert len(outdata) == 96 # 96 = 16 * 6 = len(plain_data) + 3
@pytest.mark.unit
def test_aes_decrypt(monkeypatch):
properties = b'S\x07|&\xae\x94do\x8a4'
indata = b"T\x9f^\xb5\xbf\xdc\x08/\xfe<\xe6i'\x84A^\x83\xdc\xdd5\xe9\xd5\xd0b\xa9\x7fH$\x11\x82\x8d" \
b"\xce[\x85\xe7\xf2}\xe3oJ*\xc0:\xf4\xfd\x82\xe8I"
expected = b"\x00*\x1a\t'd\x19\xb08s\xca\x8b\x13 \xaf:\x1b\x8d\x97\xf8|#M\xe9\xe1W\xd4\xe4\x97BB\xd2" \
b"\xf7\\m\xe0t\xa6$yF_-\xa0\x0b8f "
decompressor = py7zr.compressor.AESDecompressor(properties, 'secret')
assert decompressor.decompress(indata) == expected
@pytest.mark.files
def test_extract_bzip2(tmp_path):
archive = py7zr.SevenZipFile(testdata_path.joinpath('bzip2_2.7z').open(mode='rb'))
archive.extractall(path=tmp_path)
archive.close()
@pytest.mark.files
@pytest.mark.skipif(Ppmd is None, reason="ppmd library does not exist.")
def test_extract_ppmd(tmp_path):
archive = py7zr.SevenZipFile(testdata_path.joinpath('ppmd.7z').open(mode='rb'))
archive.extractall(path=tmp_path)
archive.close()
@pytest.mark.files
def test_extract_deflate(tmp_path):
with py7zr.SevenZipFile(testdata_path.joinpath('deflate.7z').open(mode='rb')) as archive:
archive.extractall(path=tmp_path)
@pytest.mark.files
@pytest.mark.skipif(Zstd is None, reason="zstandard library does not exist.")
def test_extract_zstd(tmp_path):
with py7zr.SevenZipFile(testdata_path.joinpath('zstd.7z').open(mode='rb')) as archive:
archive.extractall(path=tmp_path)
@pytest.mark.files
@pytest.mark.skipif(Zstd is None, reason="zstandard library does not exist.")
def test_extract_p7zip_zstd(tmp_path):
with py7zr.SevenZipFile(testdata_path.joinpath('p7zip-zstd.7z').open('rb')) as archive:
archive.extractall(path=tmp_path)
@pytest.mark.basic
@pytest.mark.skipif(Ppmd is None, reason="ppmd library does not exist.")
def test_compress_ppmd(tmp_path):
my_filters = [{"id": py7zr.FILTER_PPMD, 'level': 6, 'mem': 16}]
target = tmp_path.joinpath('target.7z')
archive = py7zr.SevenZipFile(target, 'w', filters=my_filters)
archive.writeall(os.path.join(testdata_path, "src"), "src")
archive.close()
#
p7zip_test(tmp_path / 'target.7z')
@pytest.mark.basic
@pytest.mark.skipif(Ppmd is None, reason="ppmd library does not exist.")
def test_compress_ppmd_2(tmp_path):
with py7zr.SevenZipFile(testdata_path.joinpath('bzip2_2.7z').open(mode='rb')) as arc:
arc.extractall(path=tmp_path)
my_filters = [{"id": py7zr.FILTER_PPMD, 'level': 6, 'mem': 16}]
target = tmp_path.joinpath('target.7z')
with py7zr.SevenZipFile(target, 'w', filters=my_filters) as archive:
archive.encoded_header_mode = False
archive.writeall(tmp_path.joinpath('10000SalesRecords.csv'))
#
p7zip_test(tmp_path / 'target.7z')
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