From 475661e689b60143717a802dff07f4e8ef88a427 Mon Sep 17 00:00:00 2001 From: "Andrew M. Kuchling" Date: Wed, 8 Jun 2005 22:53:01 +0000 Subject: [Patch #1171487, bug #1170331] Fix error in base64.b32decode when encoding a single null byte; test a null byte in all encodings to be sure it works --- Lib/base64.py | 10 ++++++---- Lib/test/test_base64.py | 6 ++++++ 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/Lib/base64.py b/Lib/base64.py index f90b91d..8914acc 100755 --- a/Lib/base64.py +++ b/Lib/base64.py @@ -221,12 +221,14 @@ def b32decode(s, casefold=False, map01=None): acc += _b32rev[c] << shift shift -= 5 if shift < 0: - parts.append(binascii.unhexlify(hex(acc)[2:-1])) + parts.append(binascii.unhexlify('%010x' % acc)) acc = 0 shift = 35 # Process the last, partial quanta - last = binascii.unhexlify(hex(acc)[2:-1]) - if padchars == 1: + last = binascii.unhexlify('%010x' % acc) + if padchars == 0: + last = '' # No characters + elif padchars == 1: last = last[:-1] elif padchars == 3: last = last[:-2] @@ -234,7 +236,7 @@ def b32decode(s, casefold=False, map01=None): last = last[:-3] elif padchars == 6: last = last[:-4] - elif padchars <> 0: + else: raise TypeError('Incorrect padding') parts.append(last) return EMPTYSTRING.join(parts) diff --git a/Lib/test/test_base64.py b/Lib/test/test_base64.py index a7fa2b9..997a413 100644 --- a/Lib/test/test_base64.py +++ b/Lib/test/test_base64.py @@ -60,6 +60,7 @@ class BaseXYTestCase(unittest.TestCase): eq = self.assertEqual # Test default alphabet eq(base64.b64encode("www.python.org"), "d3d3LnB5dGhvbi5vcmc=") + eq(base64.b64encode('\x00'), 'AA==') eq(base64.b64encode("a"), "YQ==") eq(base64.b64encode("ab"), "YWI=") eq(base64.b64encode("abc"), "YWJj") @@ -90,6 +91,7 @@ class BaseXYTestCase(unittest.TestCase): def test_b64decode(self): eq = self.assertEqual eq(base64.b64decode("d3d3LnB5dGhvbi5vcmc="), "www.python.org") + eq(base64.b64decode('AA=='), '\x00') eq(base64.b64decode("YQ=="), "a") eq(base64.b64decode("YWI="), "ab") eq(base64.b64decode("YWJj"), "abc") @@ -123,6 +125,7 @@ class BaseXYTestCase(unittest.TestCase): def test_b32encode(self): eq = self.assertEqual eq(base64.b32encode(''), '') + eq(base64.b32encode('\x00'), 'AA======') eq(base64.b32encode('a'), 'ME======') eq(base64.b32encode('ab'), 'MFRA====') eq(base64.b32encode('abc'), 'MFRGG===') @@ -132,6 +135,7 @@ class BaseXYTestCase(unittest.TestCase): def test_b32decode(self): eq = self.assertEqual eq(base64.b32decode(''), '') + eq(base64.b32decode('AA======'), '\x00') eq(base64.b32decode('ME======'), 'a') eq(base64.b32decode('MFRA===='), 'ab') eq(base64.b32decode('MFRGG==='), 'abc') @@ -166,10 +170,12 @@ class BaseXYTestCase(unittest.TestCase): def test_b16encode(self): eq = self.assertEqual eq(base64.b16encode('\x01\x02\xab\xcd\xef'), '0102ABCDEF') + eq(base64.b16encode('\x00'), '00') def test_b16decode(self): eq = self.assertEqual eq(base64.b16decode('0102ABCDEF'), '\x01\x02\xab\xcd\xef') + eq(base64.b16decode('00'), '\x00') # Lower case is not allowed without a flag self.assertRaises(TypeError, base64.b16decode, '0102abcdef') # Case fold -- cgit v0.12