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import binascii
import hashlib
import pathlib
import zipfile
import bcj
BLOCKSIZE = 8192
def test_x86_encode_once(tmp_path):
with zipfile.ZipFile(pathlib.Path(__file__).parent.joinpath("data/src.zip")) as zipsrc:
src = zipsrc.read("x86_1.bin")
encoder = bcj.BCJEncoder()
dest = encoder.encode(src)
dest += encoder.flush()
with open(tmp_path.joinpath("output.bin"), "wb") as f:
f.write(dest)
m = hashlib.sha256()
m.update(dest)
assert m.digest() == binascii.unhexlify("e396dadbbe0be4190cdea986e0ec949b049ded2b38df19268a78d32b90b72d42")
def test_x86_encode_chunked(tmp_path):
with zipfile.ZipFile(pathlib.Path(__file__).parent.joinpath("data/src.zip")) as srczip:
with srczip.open("x86_3.bin") as fin:
encoder = bcj.BCJEncoder()
m = hashlib.sha256()
with open(tmp_path.joinpath("output.bin"), "wb") as fout:
while True:
src = fin.read(BLOCKSIZE)
if len(src) == 0:
break
dest = encoder.encode(src)
m.update(dest)
fout.write(dest)
dest = encoder.flush()
fout.write(dest)
m.update(dest)
assert m.digest() == binascii.unhexlify("10b19883b74588706ec888d70f128cf027894c96cf379786b06ad0b47a78f5d1")
def test_x86_decode_once(tmp_path):
with zipfile.ZipFile(pathlib.Path(__file__).parent.joinpath("data/src.zip")) as zipsrc:
src = zipsrc.read("bcj_1.bin")
decoder = bcj.BCJDecoder(len(src))
dest = decoder.decode(src)
with open(tmp_path.joinpath("output.bin"), "wb") as f:
f.write(dest)
m = hashlib.sha256()
m.update(dest)
assert m.digest() == binascii.unhexlify("5ae0726746e2ccdad8f511ecfcf5f79df4533b83f86b1877cebc07f14a4e9b6a")
def test_x86_decode_huge(tmp_path):
"""
Test a case to decode a large file.
:param tmp_path:
:return:
"""
with zipfile.ZipFile(pathlib.Path(__file__).parent.joinpath("data/src.zip")) as zipsrc:
total_length = zipsrc.getinfo("bcj_3.bin").file_size
remaining = total_length
decoder = bcj.BCJDecoder(total_length)
m = hashlib.sha256()
with zipsrc.open("bcj_3.bin", mode="r") as fin:
with open(tmp_path.joinpath("output.bin"), "wb") as fout:
while remaining > 0:
src = fin.read(BLOCKSIZE)
dest = decoder.decode(src)
remaining -= len(dest)
m.update(dest)
fout.write(dest)
assert m.digest() == binascii.unhexlify("a0a0fd3c854e68b74f09ba1913b895402aad41b83cb5c691cee66b3c59aa4f10")
def test_x86_decode_huge_variable_chunked(tmp_path):
"""
Test a case to decode variable sizes as similar as py7zr behaior.
:param tmp_path:
:return:
"""
sizes = [46080, 46080, 35018, 322411, 48640, 48640, 1513556, 997376]
hashes = [
"abc6af45e7c983f37d54453a0f1c9cbce08cd590730bc3f38a8da575eb2df91f",
"abc6af45e7c983f37d54453a0f1c9cbce08cd590730bc3f38a8da575eb2df91f",
"8306a2b0e9985d5364f092f9ec2e4f84e787c3d7abed4f4735c330de98da5926",
"4a01689e46572487b895f5297aeef197d14477ec645fe8713eafe3a1af8edf42",
"73c170b4a80a57a2da3e11237bfe7d10a6359e05f7dbc8584934807f0177c4ba",
"73c170b4a80a57a2da3e11237bfe7d10a6359e05f7dbc8584934807f0177c4ba",
"f0e65b92b61426017d443ddf63750259025c3f4fc60d22fa98e81bcfb1f3fdbf",
"e03f6b389e4c8a49c2a891cfef50eaed1e714a9ffe2deb4e0617568ba0943422",
]
with zipfile.ZipFile(pathlib.Path(__file__).parent.joinpath("data/src.zip")) as zipsrc:
total_length = zipsrc.getinfo("bcj_3.bin").file_size
decoder = bcj.BCJDecoder(total_length)
with zipsrc.open("bcj_3.bin", mode="r") as f:
for i in range(8):
m = hashlib.sha256()
remaining = sizes[i]
while remaining > 0:
src = f.read(min(remaining, BLOCKSIZE))
dest = decoder.decode(src)
m.update(dest)
remaining -= len(dest)
assert m.digest() == binascii.unhexlify(hashes[i])
def test_x86_encode_decode_once(tmp_path):
"""
Test a case to encode and decode with single chunk.
:param tmp_path:
:return:
"""
with zipfile.ZipFile(pathlib.Path(__file__).parent.joinpath("data/src.zip")) as f:
src = f.read("x86_1.bin")
encoder = bcj.BCJEncoder()
dest = encoder.encode(src)
dest += encoder.flush()
with open(tmp_path.joinpath("output.bin"), "wb") as f:
f.write(dest)
m = hashlib.sha256()
m.update(dest)
assert m.digest() == binascii.unhexlify("e396dadbbe0be4190cdea986e0ec949b049ded2b38df19268a78d32b90b72d42")
with open(tmp_path.joinpath("output.bin"), "rb") as f:
src = f.read()
decoder = bcj.BCJDecoder(len(src))
dest = decoder.decode(src)
m = hashlib.sha256()
m.update(dest)
assert m.digest() == binascii.unhexlify("5ae0726746e2ccdad8f511ecfcf5f79df4533b83f86b1877cebc07f14a4e9b6a")
def test_x86_encode_decode_chunked(tmp_path):
"""
Test a case to encode and decode with multiple chunks.
:param tmp_path:
:return:
"""
dest = bytearray()
encoder = bcj.BCJEncoder()
with zipfile.ZipFile(pathlib.Path(__file__).parent.joinpath("data/src.zip")) as zipsrc:
with zipsrc.open("x86_1.bin", mode="r") as f:
src = f.read(BLOCKSIZE)
while len(src) > 0:
dest += encoder.encode(src)
src = f.read(BLOCKSIZE)
dest += encoder.flush()
assert len(dest) == 12800
with open(tmp_path.joinpath("output.bin"), "wb") as f:
f.write(dest)
m = hashlib.sha256()
m.update(dest)
assert m.digest() == binascii.unhexlify("e396dadbbe0be4190cdea986e0ec949b049ded2b38df19268a78d32b90b72d42")
#
dest = bytearray()
decoder = bcj.BCJDecoder(12800)
with open(tmp_path.joinpath("output.bin"), "rb") as f:
src = f.read(BLOCKSIZE)
while len(src) > 0:
dest += decoder.decode(src)
src = f.read(BLOCKSIZE)
m = hashlib.sha256(dest)
assert m.digest() == binascii.unhexlify("5ae0726746e2ccdad8f511ecfcf5f79df4533b83f86b1877cebc07f14a4e9b6a")
def test_x86_encode_decode_large(tmp_path):
"""
Test a case to encode and decode a large binary file.
:param tmp_path:
:return:
"""
with zipfile.ZipFile(pathlib.Path(__file__).parent.joinpath("data/src.zip")) as zipsrc:
dest = bytearray()
encoder = bcj.BCJEncoder()
m = hashlib.sha256()
with zipsrc.open("x86_3.bin", mode="r") as f:
src = f.read(BLOCKSIZE)
while len(src) > 0:
m.update(src)
dest += encoder.encode(src)
src = f.read(BLOCKSIZE)
hashsrc = m.digest()
dest += encoder.flush()
total_length = len(dest)
#
with open(tmp_path.joinpath("output.bin"), "wb") as f:
f.write(dest)
#
m = hashlib.sha256()
m.update(dest)
assert m.digest() == binascii.unhexlify("10b19883b74588706ec888d70f128cf027894c96cf379786b06ad0b47a78f5d1")
#
decoder = bcj.BCJDecoder(total_length)
with open(tmp_path.joinpath("output.bin"), "rb") as f:
dest = bytearray()
m = hashlib.sha256()
remaining = total_length
while remaining > 0:
size = min(remaining, BLOCKSIZE)
src = f.read(size)
tmp = decoder.decode(src)
remaining -= len(tmp)
dest += tmp
m.update(dest)
hashresult = m.digest()
assert hashresult == hashsrc
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