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Diffstat (limited to 'tests/bytecode/pylib-tests/base64.py')
| -rw-r--r-- | tests/bytecode/pylib-tests/base64.py | 410 |
1 files changed, 0 insertions, 410 deletions
diff --git a/tests/bytecode/pylib-tests/base64.py b/tests/bytecode/pylib-tests/base64.py deleted file mode 100644 index 17c6d1f3ee..0000000000 --- a/tests/bytecode/pylib-tests/base64.py +++ /dev/null @@ -1,410 +0,0 @@ -#! /usr/bin/env python3 - -"""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 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. - - 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. - - 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 = bytes() - 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: - return encoded[:-6] + b'======' - elif leftover == 2: - return encoded[:-4] + b'====' - elif leftover == 3: - return encoded[:-3] + b'===' - elif leftover == 4: - return encoded[:-1] + b'=' - return 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 TypeError('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() |