Gecko [ www.corporacionhdm.com.pe ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
collections	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
concurrent	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
config-3.3m	[ DIR ]	drwxr-xr-x	2024-05-22 10:37
ctypes	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
curses	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
dbm	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
distutils	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
email	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
encodings	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
html	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
http	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
idlelib	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
importlib	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
json	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
lib-dynload	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
lib2to3	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
logging	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
multiprocessing	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
plat-linux	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
pydoc_data	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
site-packages	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
sqlite3	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
test	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
unittest	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
urllib	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
venv	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
wsgiref	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
xml	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
xmlrpc	[ DIR ]	drwxr-xr-x	2024-05-22 10:36
__future__.py	4.48 KB	-rw-r--r--	2024-04-17 16:58
__phello__.foo.py	64 B	-rw-r--r--	2024-04-17 16:58
_compat_pickle.py	4.24 KB	-rw-r--r--	2024-04-17 16:58
_dummy_thread.py	4.66 KB	-rw-r--r--	2024-04-17 16:58
_markupbase.py	14.26 KB	-rw-r--r--	2024-04-17 16:58
_osx_support.py	18.41 KB	-rw-r--r--	2024-04-17 16:58
_pyio.py	71.2 KB	-rw-r--r--	2024-04-17 16:58
_strptime.py	21.17 KB	-rw-r--r--	2024-04-17 16:58
_sysconfigdata.py	22.31 KB	-rw-r--r--	2024-04-17 16:58
_threading_local.py	7.24 KB	-rw-r--r--	2024-04-17 16:58
_weakrefset.py	5.57 KB	-rw-r--r--	2024-04-17 16:58
abc.py	7.87 KB	-rw-r--r--	2024-04-17 16:58
aifc.py	30.33 KB	-rw-r--r--	2024-04-17 16:58
antigravity.py	475 B	-rw-r--r--	2024-04-17 16:58
argparse.py	86.98 KB	-rw-r--r--	2024-04-17 16:58
ast.py	11.86 KB	-rw-r--r--	2024-04-17 16:58
asynchat.py	11.32 KB	-rw-r--r--	2024-04-17 16:58
asyncore.py	20.27 KB	-rw-r--r--	2024-04-17 16:58
base64.py	13.66 KB	-rwxr-xr-x	2024-04-17 16:58
bdb.py	21.38 KB	-rw-r--r--	2024-04-17 16:58
binhex.py	13.39 KB	-rw-r--r--	2024-04-17 16:58
bisect.py	2.53 KB	-rw-r--r--	2024-04-17 16:58
bz2.py	18.04 KB	-rw-r--r--	2024-04-17 16:58
cProfile.py	6.21 KB	-rwxr-xr-x	2024-04-17 16:58
calendar.py	22.4 KB	-rw-r--r--	2024-04-17 16:58
cgi.py	34.72 KB	-rwxr-xr-x	2024-04-17 16:58
cgitb.py	11.76 KB	-rw-r--r--	2024-04-17 16:58
chunk.py	5.25 KB	-rw-r--r--	2024-04-17 16:58
cmd.py	14.51 KB	-rw-r--r--	2024-04-17 16:58
code.py	9.79 KB	-rw-r--r--	2024-04-17 16:58
codecs.py	35.11 KB	-rw-r--r--	2024-04-17 16:58
codeop.py	5.85 KB	-rw-r--r--	2024-04-17 16:58
colorsys.py	3.6 KB	-rw-r--r--	2024-04-17 16:58
compileall.py	9.51 KB	-rw-r--r--	2024-04-17 16:58
configparser.py	48.28 KB	-rw-r--r--	2024-04-17 16:58
contextlib.py	8.91 KB	-rw-r--r--	2024-04-17 16:58
copy.py	8.78 KB	-rw-r--r--	2024-04-17 16:58
copyreg.py	6.46 KB	-rw-r--r--	2024-04-17 16:58
crypt.py	1.83 KB	-rw-r--r--	2024-04-17 16:58
csv.py	15.81 KB	-rw-r--r--	2024-04-17 16:58
datetime.py	73.2 KB	-rw-r--r--	2024-04-17 16:58
decimal.py	223.2 KB	-rw-r--r--	2024-04-17 16:58
difflib.py	80.58 KB	-rw-r--r--	2024-04-17 16:58
dis.py	9.9 KB	-rw-r--r--	2024-04-17 16:58
doctest.py	100.52 KB	-rw-r--r--	2024-04-17 16:58
dummy_threading.py	2.75 KB	-rw-r--r--	2024-04-17 16:58
filecmp.py	9.37 KB	-rw-r--r--	2024-04-17 16:58
fileinput.py	13.92 KB	-rw-r--r--	2024-04-17 16:58
fnmatch.py	3.09 KB	-rw-r--r--	2024-04-17 16:58
formatter.py	14.58 KB	-rw-r--r--	2024-04-17 16:58
fractions.py	22.49 KB	-rw-r--r--	2024-04-17 16:58
ftplib.py	39.31 KB	-rw-r--r--	2024-04-17 16:58
functools.py	13.28 KB	-rw-r--r--	2024-04-17 16:58
genericpath.py	3.02 KB	-rw-r--r--	2024-04-17 16:58
getopt.py	7.31 KB	-rw-r--r--	2024-04-17 16:58
getpass.py	5.66 KB	-rw-r--r--	2024-04-17 16:58
gettext.py	20.15 KB	-rw-r--r--	2024-04-17 16:58
glob.py	2.77 KB	-rw-r--r--	2024-04-17 16:58
gzip.py	23.83 KB	-rw-r--r--	2024-04-17 16:58
hashlib.py	6.05 KB	-rw-r--r--	2024-04-17 16:58
heapq.py	17.58 KB	-rw-r--r--	2024-04-17 16:58
hmac.py	4.34 KB	-rw-r--r--	2024-04-17 16:58
imaplib.py	48.94 KB	-rw-r--r--	2024-04-17 16:58
imghdr.py	3.45 KB	-rw-r--r--	2024-04-17 16:58
imp.py	9.5 KB	-rw-r--r--	2024-04-17 16:58
inspect.py	77.11 KB	-rw-r--r--	2024-04-17 16:58
io.py	3.2 KB	-rw-r--r--	2024-04-17 16:58
ipaddress.py	68.66 KB	-rw-r--r--	2024-04-17 16:58
keyword.py	2.01 KB	-rwxr-xr-x	2024-04-17 16:58
linecache.py	3.77 KB	-rw-r--r--	2024-04-17 16:58
locale.py	91.03 KB	-rw-r--r--	2024-04-17 16:58
lzma.py	17.04 KB	-rw-r--r--	2024-04-17 16:58
macpath.py	5.49 KB	-rw-r--r--	2024-04-17 16:58
macurl2path.py	2.67 KB	-rw-r--r--	2024-04-17 16:58
mailbox.py	77.24 KB	-rw-r--r--	2024-04-17 16:58
mailcap.py	7.26 KB	-rw-r--r--	2024-04-17 16:58
mimetypes.py	20.25 KB	-rw-r--r--	2024-04-17 16:58
modulefinder.py	22.65 KB	-rw-r--r--	2024-04-17 16:58
netrc.py	5.61 KB	-rw-r--r--	2024-04-17 16:58
nntplib.py	41.78 KB	-rw-r--r--	2024-04-17 16:58
ntpath.py	19.96 KB	-rw-r--r--	2024-04-17 16:58
nturl2path.py	2.34 KB	-rw-r--r--	2024-04-17 16:58
numbers.py	10.15 KB	-rw-r--r--	2024-04-17 16:58
opcode.py	4.98 KB	-rw-r--r--	2024-04-17 16:58
optparse.py	58.93 KB	-rw-r--r--	2024-04-17 16:58
os.py	33.96 KB	-rw-r--r--	2024-04-17 16:58
os2emxpath.py	4.55 KB	-rw-r--r--	2024-04-17 16:58
pdb.py	59.23 KB	-rwxr-xr-x	2024-04-17 16:58
pickle.py	46.74 KB	-rw-r--r--	2024-04-17 16:58
pickletools.py	79.44 KB	-rw-r--r--	2024-04-17 16:58
pipes.py	8.71 KB	-rw-r--r--	2024-04-17 16:58
pkgutil.py	21.03 KB	-rw-r--r--	2024-04-17 16:58
platform.py	49.55 KB	-rwxr-xr-x	2024-04-17 16:58
plistlib.py	14.43 KB	-rw-r--r--	2024-04-17 16:58
poplib.py	11.11 KB	-rw-r--r--	2024-04-17 16:58
posixpath.py	13.92 KB	-rw-r--r--	2024-04-17 16:58
pprint.py	12.4 KB	-rw-r--r--	2024-04-17 16:58
profile.py	20.95 KB	-rwxr-xr-x	2024-04-17 16:58
pstats.py	25.75 KB	-rw-r--r--	2024-04-17 16:58
pty.py	4.94 KB	-rw-r--r--	2024-04-17 16:58
py_compile.py	6.56 KB	-rw-r--r--	2024-04-17 16:58
pyclbr.py	13.12 KB	-rw-r--r--	2024-04-17 16:58
pydoc.py	99.26 KB	-rwxr-xr-x	2024-04-17 16:58
queue.py	8.63 KB	-rw-r--r--	2024-04-17 16:58
quopri.py	7.14 KB	-rwxr-xr-x	2024-04-17 16:58
random.py	25.06 KB	-rw-r--r--	2024-04-17 16:58
re.py	14.62 KB	-rw-r--r--	2024-04-17 16:58
reprlib.py	4.99 KB	-rw-r--r--	2024-04-17 16:58
rlcompleter.py	5.4 KB	-rw-r--r--	2024-04-17 16:58
runpy.py	10.17 KB	-rw-r--r--	2024-04-17 16:58
sched.py	6.25 KB	-rw-r--r--	2024-04-17 16:58
shelve.py	8.05 KB	-rw-r--r--	2024-04-17 16:58
shlex.py	11.23 KB	-rw-r--r--	2024-04-17 16:58
shutil.py	38.23 KB	-rw-r--r--	2024-04-17 16:58
site.py	21.46 KB	-rw-r--r--	2024-04-17 16:58
smtpd.py	29.5 KB	-rwxr-xr-x	2024-04-17 16:58
smtplib.py	37.13 KB	-rwxr-xr-x	2024-04-17 16:58
sndhdr.py	6.07 KB	-rw-r--r--	2024-04-17 16:58
socket.py	14.56 KB	-rw-r--r--	2024-04-17 16:58
socketserver.py	23.63 KB	-rw-r--r--	2024-04-17 16:58
sre_compile.py	15.96 KB	-rw-r--r--	2024-04-17 16:58
sre_constants.py	7.06 KB	-rw-r--r--	2024-04-17 16:58
sre_parse.py	29.5 KB	-rw-r--r--	2024-04-17 16:58
ssl.py	23.9 KB	-rw-r--r--	2024-04-17 16:58
stat.py	4.2 KB	-rw-r--r--	2024-04-17 16:58
string.py	9.19 KB	-rw-r--r--	2024-04-17 16:58
stringprep.py	12.61 KB	-rw-r--r--	2024-04-17 16:58
struct.py	238 B	-rw-r--r--	2024-04-17 16:58
subprocess.py	65.99 KB	-rw-r--r--	2024-04-17 16:58
sunau.py	17.11 KB	-rw-r--r--	2024-04-17 16:58
symbol.py	2 KB	-rwxr-xr-x	2024-04-17 16:58
symtable.py	7.21 KB	-rw-r--r--	2024-04-17 16:58
sysconfig.py	24.58 KB	-rw-r--r--	2024-04-17 16:58
tabnanny.py	11.14 KB	-rwxr-xr-x	2024-04-17 16:58
tarfile.py	86.78 KB	-rwxr-xr-x	2024-04-17 16:58
telnetlib.py	26.71 KB	-rw-r--r--	2024-04-17 16:58
tempfile.py	22.47 KB	-rw-r--r--	2024-04-17 16:58
textwrap.py	16.1 KB	-rw-r--r--	2024-04-17 16:58
this.py	1003 B	-rw-r--r--	2024-04-17 16:58
threading.py	44.57 KB	-rw-r--r--	2024-04-17 16:58
timeit.py	12.1 KB	-rwxr-xr-x	2024-04-17 16:58
token.py	2.96 KB	-rw-r--r--	2024-04-17 16:58
tokenize.py	24.29 KB	-rw-r--r--	2024-04-17 16:58
trace.py	30.75 KB	-rwxr-xr-x	2024-04-17 16:58
traceback.py	11.7 KB	-rw-r--r--	2024-04-17 16:58
tty.py	879 B	-rw-r--r--	2024-04-17 16:58
types.py	3.09 KB	-rw-r--r--	2024-04-17 16:58
uu.py	6.61 KB	-rwxr-xr-x	2024-04-17 16:58
uuid.py	21.83 KB	-rw-r--r--	2024-04-17 16:58
warnings.py	13.5 KB	-rw-r--r--	2024-04-17 16:58
wave.py	18.14 KB	-rw-r--r--	2024-04-17 16:58
weakref.py	11.23 KB	-rw-r--r--	2024-04-17 16:58
webbrowser.py	22.38 KB	-rwxr-xr-x	2024-04-17 16:58
xdrlib.py	5.25 KB	-rw-r--r--	2024-04-17 16:58
zipfile.py	64.87 KB	-rw-r--r--	2024-04-17 16:58

Rename

#! /opt/alt/python33/bin/python3.3

"""RFC 3548: Base16, Base32, Base64 Data Encodings"""

# Modified 04-Oct-1995 by Jack Jansen to use binascii module
# Modified 30-Dec-2003 by Barry Warsaw to add full RFC 3548 support
# Modified 22-May-2007 by Guido van Rossum to use bytes everywhere

import re
import struct
import binascii

__all__ = [
    # Legacy interface exports traditional RFC 1521 Base64 encodings
    'encode', 'decode', 'encodebytes', 'decodebytes',
    # Generalized interface for other encodings
    'b64encode', 'b64decode', 'b32encode', 'b32decode',
    'b16encode', 'b16decode',
    # Standard Base64 encoding
    'standard_b64encode', 'standard_b64decode',
    # Some common Base64 alternatives.  As referenced by RFC 3458, see thread
    # starting at:
    #
    # http://zgp.org/pipermail/p2p-hackers/2001-September/000316.html
    'urlsafe_b64encode', 'urlsafe_b64decode',
    ]

bytes_types = (bytes, bytearray)  # Types acceptable as binary data

def _bytes_from_decode_data(s):
    if isinstance(s, str):
        try:
            return s.encode('ascii')
        except UnicodeEncodeError:
            raise ValueError('string argument should contain only ASCII characters')
    elif isinstance(s, bytes_types):
        return s
    else:
        raise TypeError("argument should be bytes or ASCII string, not %s" % s.__class__.__name__)

# Base64 encoding/decoding uses binascii

def b64encode(s, altchars=None):
    """Encode a byte string using Base64.

s is the byte string to encode.  Optional altchars must be a byte
    string of length 2 which specifies an alternative alphabet for the
    '+' and '/' characters.  This allows an application to
    e.g. generate url or filesystem safe Base64 strings.

The encoded byte string is returned.
    """
    if not isinstance(s, bytes_types):
        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):
            raise TypeError("expected bytes, not %s"
                            % altchars.__class__.__name__)
        assert len(altchars) == 2, repr(altchars)
        return encoded.translate(bytes.maketrans(b'+/', altchars))
    return encoded

def b64decode(s, altchars=None, validate=False):
    """Decode a Base64 encoded byte string.

s is the byte string to decode.  Optional altchars must be a
    string of length 2 which specifies the alternative alphabet used
    instead of the '+' and '/' characters.

The decoded string is returned.  A binascii.Error is raised if s is
    incorrectly padded.

If validate is False (the default), non-base64-alphabet characters are
    discarded prior to the padding check.  If validate is True,
    non-base64-alphabet characters in the input result in a binascii.Error.
    """
    s = _bytes_from_decode_data(s)
    if altchars is not None:
        altchars = _bytes_from_decode_data(altchars)
        assert len(altchars) == 2, repr(altchars)
        s = s.translate(bytes.maketrans(altchars, b'+/'))
    if validate and not re.match(b'^[A-Za-z0-9+/]*={0,2}$', s):
        raise binascii.Error('Non-base64 digit found')
    return binascii.a2b_base64(s)

def standard_b64encode(s):
    """Encode a byte string using the standard Base64 alphabet.

s is the byte string to encode.  The encoded byte string is returned.
    """
    return b64encode(s)

def standard_b64decode(s):
    """Decode a byte string encoded with the standard Base64 alphabet.

s is the byte string to decode.  The decoded byte string is
    returned.  binascii.Error is raised if the input is incorrectly
    padded or if there are non-alphabet characters present in the
    input.
    """
    return b64decode(s)

_urlsafe_encode_translation = bytes.maketrans(b'+/', b'-_')
_urlsafe_decode_translation = bytes.maketrans(b'-_', b'+/')

def urlsafe_b64encode(s):
    """Encode a byte string using a url-safe Base64 alphabet.

s is the byte string to encode.  The encoded byte string is
    returned.  The alphabet uses '-' instead of '+' and '_' instead of
    '/'.
    """
    return b64encode(s).translate(_urlsafe_encode_translation)

def urlsafe_b64decode(s):
    """Decode a byte string encoded with the standard Base64 alphabet.

The alphabet uses '-' instead of '+' and '_' instead of '/'.
    """
    s = _bytes_from_decode_data(s)
    s = s.translate(_urlsafe_decode_translation)
    return b64decode(s)

# Base32 encoding/decoding must be done in Python
_b32alphabet = {
    0: b'A',  9: b'J', 18: b'S', 27: b'3',
    1: b'B', 10: b'K', 19: b'T', 28: b'4',
    2: b'C', 11: b'L', 20: b'U', 29: b'5',
    3: b'D', 12: b'M', 21: b'V', 30: b'6',
    4: b'E', 13: b'N', 22: b'W', 31: b'7',
    5: b'F', 14: b'O', 23: b'X',
    6: b'G', 15: b'P', 24: b'Y',
    7: b'H', 16: b'Q', 25: b'Z',
    8: b'I', 17: b'R', 26: b'2',
    }

_b32tab = [v[0] for k, v in sorted(_b32alphabet.items())]
_b32rev = dict([(v[0], k) for k, v in _b32alphabet.items()])

def b32encode(s):
    """Encode a byte string using Base32.

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__)
    quanta, leftover = divmod(len(s), 5)
    # Pad the last quantum with zero bits if necessary
    if leftover:
        s = s + bytes(5 - leftover)  # Don't use += !
        quanta += 1
    encoded = bytearray()
    for i in range(quanta):
        # c1 and c2 are 16 bits wide, c3 is 8 bits wide.  The intent of this
        # code is to process the 40 bits in units of 5 bits.  So we take the 1
        # leftover bit of c1 and tack it onto c2.  Then we take the 2 leftover
        # bits of c2 and tack them onto c3.  The shifts and masks are intended
        # to give us values of exactly 5 bits in width.
        c1, c2, c3 = struct.unpack('!HHB', s[i*5:(i+1)*5])
        c2 += (c1 & 1) << 16 # 17 bits wide
        c3 += (c2 & 3) << 8  # 10 bits wide
        encoded += bytes([_b32tab[c1 >> 11],         # bits 1 - 5
                          _b32tab[(c1 >> 6) & 0x1f], # bits 6 - 10
                          _b32tab[(c1 >> 1) & 0x1f], # bits 11 - 15
                          _b32tab[c2 >> 12],         # bits 16 - 20 (1 - 5)
                          _b32tab[(c2 >> 7) & 0x1f], # bits 21 - 25 (6 - 10)
                          _b32tab[(c2 >> 2) & 0x1f], # bits 26 - 30 (11 - 15)
                          _b32tab[c3 >> 5],          # bits 31 - 35 (1 - 5)
                          _b32tab[c3 & 0x1f],        # bits 36 - 40 (1 - 5)
                          ])
    # Adjust for any leftover partial quanta
    if leftover == 1:
        encoded[-6:] = b'======'
    elif leftover == 2:
        encoded[-4:] = b'===='
    elif leftover == 3:
        encoded[-3:] = b'==='
    elif leftover == 4:
        encoded[-1:] = b'='
    return bytes(encoded)

def b32decode(s, casefold=False, map01=None):
    """Decode a Base32 encoded byte string.

s is the byte string to decode.  Optional casefold is a flag
    specifying whether a lowercase alphabet is acceptable as input.
    For security purposes, the default is False.

RFC 3548 allows for optional mapping of the digit 0 (zero) to the
    letter O (oh), and for optional mapping of the digit 1 (one) to
    either the letter I (eye) or letter L (el).  The optional argument
    map01 when not None, specifies which letter the digit 1 should be
    mapped to (when map01 is not None, the digit 0 is always mapped to
    the letter O).  For security purposes the default is None, so that
    0 and 1 are not allowed in the input.

The decoded byte string is returned.  binascii.Error is raised if
    the input is incorrectly padded or if there are non-alphabet
    characters present in the input.
    """
    s = _bytes_from_decode_data(s)
    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 is not None:
        map01 = _bytes_from_decode_data(map01)
        assert len(map01) == 1, repr(map01)
        s = s.translate(bytes.maketrans(b'01', b'O' + map01))
    if casefold:
        s = s.upper()
    # Strip off pad characters from the right.  We need to count the pad
    # characters because this will tell us how many null bytes to remove from
    # the end of the decoded string.
    padchars = 0
    mo = re.search(b'(?P<pad>[=]*)$', s)
    if mo:
        padchars = len(mo.group('pad'))
        if padchars > 0:
            s = s[:-padchars]
    # Now decode the full quanta
    parts = []
    acc = 0
    shift = 35
    for c in s:
        val = _b32rev.get(c)
        if val is None:
            raise binascii.Error('Non-base32 digit found')
        acc += _b32rev[c] << shift
        shift -= 5
        if shift < 0:
            parts.append(binascii.unhexlify(bytes('%010x' % acc, "ascii")))
            acc = 0
            shift = 35
    # Process the last, partial quanta
    last = binascii.unhexlify(bytes('%010x' % acc, "ascii"))
    if padchars == 0:
        last = b''                      # No characters
    elif padchars == 1:
        last = last[:-1]
    elif padchars == 3:
        last = last[:-2]
    elif padchars == 4:
        last = last[:-3]
    elif padchars == 6:
        last = last[:-4]
    else:
        raise binascii.Error('Incorrect padding')
    parts.append(last)
    return b''.join(parts)

# RFC 3548, Base 16 Alphabet specifies uppercase, but hexlify() returns
# lowercase.  The RFC also recommends against accepting input case
# insensitively.
def b16encode(s):
    """Encode a byte string using Base16.

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()

def b16decode(s, casefold=False):
    """Decode a Base16 encoded byte string.

s is the byte string to decode.  Optional casefold is a flag
    specifying whether a lowercase alphabet is acceptable as input.
    For security purposes, the default is False.

The decoded byte string is returned.  binascii.Error is raised if
    s were incorrectly padded or if there are non-alphabet characters
    present in the string.
    """
    s = _bytes_from_decode_data(s)
    if casefold:
        s = s.upper()
    if re.search(b'[^0-9A-F]', s):
        raise binascii.Error('Non-base16 digit found')
    return binascii.unhexlify(s)

# Legacy interface.  This code could be cleaned up since I don't believe
# binascii has any line length limitations.  It just doesn't seem worth it
# though.  The files should be opened in binary mode.

MAXLINESIZE = 76 # Excluding the CRLF
MAXBINSIZE = (MAXLINESIZE//4)*3

def encode(input, output):
    """Encode a file; input and output are binary files."""
    while True:
        s = input.read(MAXBINSIZE)
        if not s:
            break
        while len(s) < MAXBINSIZE:
            ns = input.read(MAXBINSIZE-len(s))
            if not ns:
                break
            s += ns
        line = binascii.b2a_base64(s)
        output.write(line)

def decode(input, output):
    """Decode a file; input and output are binary files."""
    while True:
        line = input.readline()
        if not line:
            break
        s = binascii.a2b_base64(line)
        output.write(s)

def encodebytes(s):
    """Encode a bytestring into a bytestring containing multiple lines
    of base-64 data."""
    if not isinstance(s, bytes_types):
        raise TypeError("expected bytes, not %s" % s.__class__.__name__)
    pieces = []
    for i in range(0, len(s), MAXBINSIZE):
        chunk = s[i : i + MAXBINSIZE]
        pieces.append(binascii.b2a_base64(chunk))
    return b"".join(pieces)

def encodestring(s):
    """Legacy alias of encodebytes()."""
    import warnings
    warnings.warn("encodestring() is a deprecated alias, use encodebytes()",
                  DeprecationWarning, 2)
    return encodebytes(s)

def decodebytes(s):
    """Decode a bytestring of base-64 data into a bytestring."""
    if not isinstance(s, bytes_types):
        raise TypeError("expected bytes, not %s" % s.__class__.__name__)
    return binascii.a2b_base64(s)

def decodestring(s):
    """Legacy alias of decodebytes()."""
    import warnings
    warnings.warn("decodestring() is a deprecated alias, use decodebytes()",
                  DeprecationWarning, 2)
    return decodebytes(s)

# Usable as a script...
def main():
    """Small main program"""
    import sys, getopt
    try:
        opts, args = getopt.getopt(sys.argv[1:], 'deut')
    except getopt.error as msg:
        sys.stdout = sys.stderr
        print(msg)
        print("""usage: %s [-d|-e|-u|-t] [file|-]
        -d, -u: decode
        -e: encode (default)
        -t: encode and decode string 'Aladdin:open sesame'"""%sys.argv[0])
        sys.exit(2)
    func = encode
    for o, a in opts:
        if o == '-e': func = encode
        if o == '-d': func = decode
        if o == '-u': func = decode
        if o == '-t': test(); return
    if args and args[0] != '-':
        with open(args[0], 'rb') as f:
            func(f, sys.stdout.buffer)
    else:
        func(sys.stdin.buffer, sys.stdout.buffer)

def test():
    s0 = b"Aladdin:open sesame"
    print(repr(s0))
    s1 = encodebytes(s0)
    print(repr(s1))
    s2 = decodebytes(s1)
    print(repr(s2))
    assert s0 == s2

if __name__ == '__main__':
    main()