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"""Hashing tests.
"""
import hashlib
from binascii import hexlify, unhexlify
import rarfile
from rarfile import Blake2SP, CRC32Context, NoHashContext, Rar3Sha1
def tohex(data):
"""Return hex string."""
return hexlify(data).decode("ascii")
def test_nohash():
assert NoHashContext("").hexdigest() is None
assert NoHashContext("asd").hexdigest() is None
md = NoHashContext()
md.update("asd")
assert md.digest() is None
def test_crc32():
assert CRC32Context(b"").hexdigest() == "00000000"
assert CRC32Context(b"Hello").hexdigest() == "f7d18982"
assert CRC32Context(b"Bye").hexdigest() == "4f7ad7d4"
md = CRC32Context()
md.update(b"He")
md.update(b"ll")
md.update(b"o")
assert md.hexdigest() == "f7d18982"
def xblake2sp(xdata):
data = unhexlify(xdata)
md = Blake2SP()
md.update(data)
return md.hexdigest()
def xblake2sp_slow(xdata):
data = unhexlify(xdata)
md = Blake2SP()
buf = memoryview(data)
pos = 0
while pos < len(buf):
md.update(buf[pos: pos + 3])
pos += 3
return md.hexdigest()
def test_blake2sp():
assert Blake2SP(b"").hexdigest() == "dd0e891776933f43c7d032b08a917e25741f8aa9a12c12e1cac8801500f2ca4f"
assert Blake2SP(b"Hello").hexdigest() == "0d6bae0db99f99183d060f7994bb94b45c6490b2a0a628b8b1346ebea8ec1d66"
assert xblake2sp("") == "dd0e891776933f43c7d032b08a917e25741f8aa9a12c12e1cac8801500f2ca4f"
assert xblake2sp("00") == "a6b9eecc25227ad788c99d3f236debc8da408849e9a5178978727a81457f7239"
long1 = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f3031"
assert xblake2sp(long1) == "270affa6426f1a515c9b76dfc27d181fc2fd57d082a3ba2c1eef071533a6dfb7"
long2 = long1 * 20
assert xblake2sp(long2) == "24a78d92592d0761a3681f32935225ca55ffb8eb16b55ab9481c89c59a985ff3"
assert xblake2sp_slow(long2) == "24a78d92592d0761a3681f32935225ca55ffb8eb16b55ab9481c89c59a985ff3"
def test_rar3_sha1():
for n in range(0, 200):
data = bytearray(range(n))
h1 = hashlib.sha1(data).hexdigest()
h2 = Rar3Sha1(data).hexdigest()
assert h1 == h2
data = bytearray([(i & 255) for i in range(2000)])
x1 = hashlib.sha1()
x2 = Rar3Sha1()
for step in (3, 17, 67, 128, 157):
pos = 0
while pos < len(data):
pos2 = pos + step
if pos2 > len(data):
pos2 = len(data)
x1.update(data[pos:pos2])
x2.update(data[pos:pos2])
assert x1.hexdigest() == x2.hexdigest()
pos = pos2
def test_rar3_s2k():
exp = ("a160cb31cb262e9231c0b6fc984fbb0d", "aa54a659fb0c359b30f353a6343fb11d")
key, iv = rarfile.rar3_s2k(b"password", unhexlify("00FF00"))
assert (tohex(key), tohex(iv)) == exp
key, iv = rarfile.rar3_s2k("password", unhexlify("00FF00"))
assert (tohex(key), tohex(iv)) == exp
exp = ("ffff33ffaf31987c899ccc2f965a8927", "bdff6873721b247afa4f978448a5aeef")
key, iv = rarfile.rar3_s2k("p" * 28, unhexlify("1122334455667788"))
assert (tohex(key), tohex(iv)) == exp
exp = ("306cafde28f1ea78c9427c3ec642c0db", "173ecdf574c0bfe9e7c23bdfd96fa435")
key, iv = rarfile.rar3_s2k("p" * 29, unhexlify("1122334455667788"))
assert (tohex(key), tohex(iv)) == exp
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