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Removed implicit convertions of str object to bytes from base64. 

This also exposed some bugs in urlib2 and email.base64mime, which I
tried my best to fix. However, someone will probably have to double
check.
This commit is contained in:
Alexandre Vassalotti 2008-05-03 04:39:38 +00:00
parent 8cb02b6000
commit 5209857f8e
4 changed files with 42 additions and 16 deletions
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22
Lib/base64.py
View File

@ -53,12 +53,13 @@ def b64encode(s, altchars=None):
The encoded byte string is returned.
"""
if not isinstance(s, bytes_types):
s = bytes(s, "ascii")
raise TypeError("expected bytes, not %s" % s.__class__.__name__)
# Strip off the trailing newline
encoded = binascii.b2a_base64(s)[:-1]
if altchars is not None:
if not isinstance(altchars, bytes_types):
altchars = bytes(altchars, "ascii")
altchars = TypeError("expected bytes, not %s"
% altchars.__class__.__name__)
assert len(altchars) == 2, repr(altchars)
return _translate(encoded, {'+': altchars[0:1], '/': altchars[1:2]})
return encoded
@ -76,10 +77,11 @@ def b64decode(s, altchars=None):
present in the string.
"""
if not isinstance(s, bytes_types):
s = bytes(s)
raise TypeError("expected bytes, not %s" % s.__class__.__name__)
if altchars is not None:
if not isinstance(altchars, bytes_types):
altchars = bytes(altchars, "ascii")
raise TypeError("expected bytes, not %s"
% altchars.__class__.__name__)
assert len(altchars) == 2, repr(altchars)
s = _translate(s, {chr(altchars[0]): b'+', chr(altchars[1]): b'/'})
return binascii.a2b_base64(s)
@ -148,7 +150,7 @@ def b32encode(s):
s is the byte string to encode. The encoded byte string is returned.
"""
if not isinstance(s, bytes_types):
s = bytes(s)
raise TypeError("expected bytes, not %s" % s.__class__.__name__)
quanta, leftover = divmod(len(s), 5)
# Pad the last quantum with zero bits if necessary
if leftover:
@ -205,16 +207,16 @@ def b32decode(s, casefold=False, map01=None):
characters present in the input.
"""
if not isinstance(s, bytes_types):
s = bytes(s)
raise TypeError("expected bytes, not %s" % s.__class__.__name__)
quanta, leftover = divmod(len(s), 8)
if leftover:
raise binascii.Error('Incorrect padding')
# Handle section 2.4 zero and one mapping. The flag map01 will be either
# False, or the character to map the digit 1 (one) to. It should be
# either L (el) or I (eye).
if map01:
if map01 is not None:
if not isinstance(map01, bytes_types):
map01 = bytes(map01)
raise TypeError("expected bytes, not %s" % map01.__class__.__name__)
assert len(map01) == 1, repr(map01)
s = _translate(s, {b'0': b'O', b'1': map01})
if casefold:
@ -269,6 +271,8 @@ def b16encode(s):
s is the byte string to encode. The encoded byte string is returned.
"""
if not isinstance(s, bytes_types):
raise TypeError("expected bytes, not %s" % s.__class__.__name__)
return binascii.hexlify(s).upper()
@ -284,7 +288,7 @@ def b16decode(s, casefold=False):
present in the string.
"""
if not isinstance(s, bytes_types):
s = bytes(s)
raise TypeError("expected bytes, not %s" % s.__class__.__name__)
if casefold:
s = s.upper()
if re.search('[^0-9A-F]', s):

5
Lib/email/base64mime.py
View File

@ -66,9 +66,10 @@ def header_encode(header_bytes, charset='iso-8859-1'):
charset names the character set to use to encode the header. It defaults
to iso-8859-1. Base64 encoding is defined in RFC 2045.
"""
# Return empty headers unchanged
if not header_bytes:
return str(header_bytes)
return ""
if isinstance(header_bytes, str):
header_bytes = header_bytes.encode(charset)
encoded = b64encode(header_bytes).decode("ascii")
return '=?%s?b?%s?=' % (charset, encoded)

27
Lib/test/test_base64.py
View File

@ -19,6 +19,7 @@ class LegacyBase64TestCase(unittest.TestCase):
b"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0\nNT"
b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==\n")
self.assertRaises(TypeError, base64.encodestring, "")
def test_decodestring(self):
eq = self.assertEqual
@ -33,6 +34,7 @@ class LegacyBase64TestCase(unittest.TestCase):
b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
b"0123456789!@#0^&*();:<>,. []{}")
eq(base64.decodestring(b''), b'')
self.assertRaises(TypeError, base64.decodestring, "")
def test_encode(self):
eq = self.assertEqual
@ -54,7 +56,6 @@ class LegacyBase64TestCase(unittest.TestCase):
base64.decode(infp, outfp)
self.assertEqual(outfp.getvalue(), b'www.python.org')
class BaseXYTestCase(unittest.TestCase):
def test_b64encode(self):
@ -73,7 +74,10 @@ class BaseXYTestCase(unittest.TestCase):
b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0NT"
b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==")
# Test with arbitrary alternative characters
eq(base64.b64encode(b'\xd3V\xbeo\xf7\x1d', altchars='*$'), b'01a*b$cd')
eq(base64.b64encode(b'\xd3V\xbeo\xf7\x1d', altchars=b'*$'), b'01a*b$cd')
# Check if passing a str object raises an error
self.assertRaises(TypeError, base64.b64encode, "")
self.assertRaises(TypeError, base64.b64encode, b"", altchars="")
# Test standard alphabet
eq(base64.standard_b64encode(b"www.python.org"), b"d3d3LnB5dGhvbi5vcmc=")
eq(base64.standard_b64encode(b"a"), b"YQ==")
@ -86,8 +90,13 @@ class BaseXYTestCase(unittest.TestCase):
b"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0NT"
b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==")
# Check if passing a str object raises an error
self.assertRaises(TypeError, base64.standard_b64encode, "")
self.assertRaises(TypeError, base64.standard_b64encode, b"", altchars="")
# Test with 'URL safe' alternative characters
eq(base64.urlsafe_b64encode(b'\xd3V\xbeo\xf7\x1d'), b'01a-b_cd')
# Check if passing a str object raises an error
self.assertRaises(TypeError, base64.urlsafe_b64encode, "")
def test_b64decode(self):
eq = self.assertEqual
@ -104,7 +113,10 @@ class BaseXYTestCase(unittest.TestCase):
b"0123456789!@#0^&*();:<>,. []{}")
eq(base64.b64decode(b''), b'')
# Test with arbitrary alternative characters
eq(base64.b64decode(b'01a*b$cd', altchars='*$'), b'\xd3V\xbeo\xf7\x1d')
eq(base64.b64decode(b'01a*b$cd', altchars=b'*$'), b'\xd3V\xbeo\xf7\x1d')
# Check if passing a str object raises an error
self.assertRaises(TypeError, base64.b64decode, "")
self.assertRaises(TypeError, base64.b64decode, b"", altchars="")
# Test standard alphabet
eq(base64.standard_b64decode(b"d3d3LnB5dGhvbi5vcmc="), b"www.python.org")
eq(base64.standard_b64decode(b"YQ=="), b"a")
@ -117,8 +129,12 @@ class BaseXYTestCase(unittest.TestCase):
b"abcdefghijklmnopqrstuvwxyz"
b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
b"0123456789!@#0^&*();:<>,. []{}")
# Check if passing a str object raises an error
self.assertRaises(TypeError, base64.standard_b64decode, "")
self.assertRaises(TypeError, base64.standard_b64decode, b"", altchars="")
# Test with 'URL safe' alternative characters
eq(base64.urlsafe_b64decode(b'01a-b_cd'), b'\xd3V\xbeo\xf7\x1d')
self.assertRaises(TypeError, base64.urlsafe_b64decode, "")
def test_b64decode_error(self):
self.assertRaises(binascii.Error, base64.b64decode, b'abc')
@ -132,6 +148,7 @@ class BaseXYTestCase(unittest.TestCase):
eq(base64.b32encode(b'abc'), b'MFRGG===')
eq(base64.b32encode(b'abcd'), b'MFRGGZA=')
eq(base64.b32encode(b'abcde'), b'MFRGGZDF')
self.assertRaises(TypeError, base64.b32encode, "")
def test_b32decode(self):
eq = self.assertEqual
@ -142,6 +159,7 @@ class BaseXYTestCase(unittest.TestCase):
eq(base64.b32decode(b'MFRGG==='), b'abc')
eq(base64.b32decode(b'MFRGGZA='), b'abcd')
eq(base64.b32decode(b'MFRGGZDF'), b'abcde')
self.assertRaises(TypeError, base64.b32decode, "")
def test_b32decode_casefold(self):
eq = self.assertEqual
@ -163,6 +181,7 @@ class BaseXYTestCase(unittest.TestCase):
eq(base64.b32decode(b'MLO23456'), b'b\xdd\xad\xf3\xbe')
eq(base64.b32decode(b'M1023456', map01=b'L'), b'b\xdd\xad\xf3\xbe')
eq(base64.b32decode(b'M1023456', map01=b'I'), b'b\x1d\xad\xf3\xbe')
self.assertRaises(TypeError, base64.b32decode, b"", map01="")
def test_b32decode_error(self):
self.assertRaises(binascii.Error, base64.b32decode, b'abc')
@ -172,6 +191,7 @@ class BaseXYTestCase(unittest.TestCase):
eq = self.assertEqual
eq(base64.b16encode(b'\x01\x02\xab\xcd\xef'), b'0102ABCDEF')
eq(base64.b16encode(b'\x00'), b'00')
self.assertRaises(TypeError, base64.b16encode, "")
def test_b16decode(self):
eq = self.assertEqual
@ -181,6 +201,7 @@ class BaseXYTestCase(unittest.TestCase):
self.assertRaises(binascii.Error, base64.b16decode, b'0102abcdef')
# Case fold
eq(base64.b16decode(b'0102abcdef', True), b'\x01\x02\xab\xcd\xef')
self.assertRaises(TypeError, base64.b16decode, "")
def test_ErrorHeritage(self):
self.assert_(issubclass(binascii.Error, ValueError))

4
Lib/urllib2.py
View File

@ -682,7 +682,7 @@ class ProxyHandler(BaseHandler):
proxy_type = orig_type
if user and password:
user_pass = '%s:%s' % (unquote(user), unquote(password))
creds = str(base64.b64encode(user_pass)).strip()
creds = base64.b64encode(user_pass.encode()).decode("ascii")
req.add_header('Proxy-authorization', 'Basic ' + creds)
hostport = unquote(hostport)
req.set_proxy(hostport, proxy_type)
@ -808,7 +808,7 @@ class AbstractBasicAuthHandler:
user, pw = self.passwd.find_user_password(realm, host)
if pw is not None:
raw = "%s:%s" % (user, pw)
auth = 'Basic %s' % base64.b64encode(raw).strip().decode()
auth = "Basic " + base64.b64encode(raw.encode()).decode("ascii")
if req.headers.get(self.auth_header, None) == auth:
return None
req.add_header(self.auth_header, auth)