gh-104773: PEP 594: Remove the crypt module (#104908)

Remove the crypt module and its private _crypt extension, deprecated
in Python 3.11.

1 files changed, 0 insertions, 124 deletions

diff --git a/Lib/crypt.py b/Lib/crypt.py
deleted file mode 100644
index de4a14a3884..00000000000
--- a/Lib/crypt.py
+++ /dev/null
@@ -1,124 +0,0 @@
-"""Wrapper to the POSIX crypt library call and associated functionality."""
-
-import sys as _sys
-
-try:
-    import _crypt
-except ModuleNotFoundError:
-    if _sys.platform == 'win32':
-        raise ImportError("The crypt module is not supported on Windows")
-    else:
-        raise ImportError("The required _crypt module was not built as part of CPython")
-
-import errno
-import string as _string
-import warnings
-from random import SystemRandom as _SystemRandom
-from collections import namedtuple as _namedtuple
-
-
-warnings._deprecated(__name__, remove=(3, 13))
-
-
-_saltchars = _string.ascii_letters + _string.digits + './'
-_sr = _SystemRandom()
-
-
-class _Method(_namedtuple('_Method', 'name ident salt_chars total_size')):
-
-    """Class representing a salt method per the Modular Crypt Format or the
-    legacy 2-character crypt method."""
-
-    def __repr__(self):
-        return '<crypt.METHOD_{}>'.format(self.name)
-
-
-def mksalt(method=None, *, rounds=None):
-    """Generate a salt for the specified method.
-
-    If not specified, the strongest available method will be used.
-
-    """
-    if method is None:
-        method = methods[0]
-    if rounds is not None and not isinstance(rounds, int):
-        raise TypeError(f'{rounds.__class__.__name__} object cannot be '
-                        f'interpreted as an integer')
-    if not method.ident:  # traditional
-        s = ''
-    else:  # modular
-        s = f'${method.ident}$'
-
-    if method.ident and method.ident[0] == '2':  # Blowfish variants
-        if rounds is None:
-            log_rounds = 12
-        else:
-            log_rounds = int.bit_length(rounds-1)
-            if rounds != 1 << log_rounds:
-                raise ValueError('rounds must be a power of 2')
-            if not 4 <= log_rounds <= 31:
-                raise ValueError('rounds out of the range 2**4 to 2**31')
-        s += f'{log_rounds:02d}$'
-    elif method.ident in ('5', '6'):  # SHA-2
-        if rounds is not None:
-            if not 1000 <= rounds <= 999_999_999:
-                raise ValueError('rounds out of the range 1000 to 999_999_999')
-            s += f'rounds={rounds}$'
-    elif rounds is not None:
-        raise ValueError(f"{method} doesn't support the rounds argument")
-
-    s += ''.join(_sr.choice(_saltchars) for char in range(method.salt_chars))
-    return s
-
-
-def crypt(word, salt=None):
-    """Return a string representing the one-way hash of a password, with a salt
-    prepended.
-
-    If ``salt`` is not specified or is ``None``, the strongest
-    available method will be selected and a salt generated.  Otherwise,
-    ``salt`` may be one of the ``crypt.METHOD_*`` values, or a string as
-    returned by ``crypt.mksalt()``.
-
-    """
-    if salt is None or isinstance(salt, _Method):
-        salt = mksalt(salt)
-    return _crypt.crypt(word, salt)
-
-
-#  available salting/crypto methods
-methods = []
-
-def _add_method(name, *args, rounds=None):
-    method = _Method(name, *args)
-    globals()['METHOD_' + name] = method
-    salt = mksalt(method, rounds=rounds)
-    result = None
-    try:
-        result = crypt('', salt)
-    except OSError as e:
-        # Not all libc libraries support all encryption methods.
-        if e.errno in {errno.EINVAL, errno.EPERM, errno.ENOSYS}:
-            return False
-        raise
-    if result and len(result) == method.total_size:
-        methods.append(method)
-        return True
-    return False
-
-_add_method('SHA512', '6', 16, 106)
-_add_method('SHA256', '5', 16, 63)
-
-# Choose the strongest supported version of Blowfish hashing.
-# Early versions have flaws.  Version 'a' fixes flaws of
-# the initial implementation, 'b' fixes flaws of 'a'.
-# 'y' is the same as 'b', for compatibility
-# with openwall crypt_blowfish.
-for _v in 'b', 'y', 'a', '':
-    if _add_method('BLOWFISH', '2' + _v, 22, 59 + len(_v), rounds=1<<4):
-        break
-
-_add_method('MD5', '1', 8, 34)
-_add_method('CRYPT', None, 2, 13)
-
-del _v, _add_method