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svn+ssh://pythondev@svn.python.org/python/trunk ........ r72558 | benjamin.peterson | 2009-05-11 01:52:09 +0200 (Mo, 11 Mai 2009) | 1 line sys.setdefaultencoding() strikes me as a bad example ........ r72745 | benjamin.peterson | 2009-05-17 16:16:29 +0200 (So, 17 Mai 2009) | 1 line ignore .rst files in sphinx its self ........ r72750 | benjamin.peterson | 2009-05-17 18:59:27 +0200 (So, 17 Mai 2009) | 1 line chop off slash ........ r72876 | benjamin.peterson | 2009-05-23 22:59:09 +0200 (Sa, 23 Mai 2009) | 1 line remove mention of old ctypes version ........ r73042 | benjamin.peterson | 2009-05-30 05:10:52 +0200 (Sa, 30 Mai 2009) | 1 line no fdatasync on macos ........ r73045 | georg.brandl | 2009-05-30 09:26:04 +0200 (Sa, 30 Mai 2009) | 1 line #6146: fix markup bug. ........ r73046 | georg.brandl | 2009-05-30 09:31:25 +0200 (Sa, 30 Mai 2009) | 1 line Use preferred form of raising exceptions. ........ r73047 | georg.brandl | 2009-05-30 12:33:23 +0200 (Sa, 30 Mai 2009) | 1 line Fix some more small markup problems. ........ r73048 | georg.brandl | 2009-05-30 12:34:25 +0200 (Sa, 30 Mai 2009) | 1 line Fix markup problem. ........ r73069 | benjamin.peterson | 2009-05-31 02:42:42 +0200 (So, 31 Mai 2009) | 1 line fix signature ........ r73089 | andrew.kuchling | 2009-06-01 02:14:19 +0200 (Mo, 01 Jun 2009) | 1 line The class for regexes isn't called RegexObject any more; correct the text ........ r73163 | georg.brandl | 2009-06-03 09:25:35 +0200 (Mi, 03 Jun 2009) | 1 line Use the preferred form of raise statements in the docs. ........ r73186 | georg.brandl | 2009-06-03 23:21:09 +0200 (Mi, 03 Jun 2009) | 1 line #6174: fix indentation in code example. ........ r73213 | georg.brandl | 2009-06-04 12:15:57 +0200 (Do, 04 Jun 2009) | 1 line #5967: note that the C slicing APIs do not support negative indices. ........ r73215 | georg.brandl | 2009-06-04 12:22:31 +0200 (Do, 04 Jun 2009) | 1 line #6176: fix man page section for flock(2). ........ r73217 | georg.brandl | 2009-06-04 12:27:21 +0200 (Do, 04 Jun 2009) | 1 line #6175: document that inet_aton supports alternate input formats with less than three dots. ........ r73257 | georg.brandl | 2009-06-06 19:50:05 +0200 (Sa, 06 Jun 2009) | 1 line #6211: elaborate a bit on ways to call the function. ........ r73258 | georg.brandl | 2009-06-06 19:51:31 +0200 (Sa, 06 Jun 2009) | 1 line #6204: use a real reference instead of "see later". ........ r73260 | georg.brandl | 2009-06-06 20:21:58 +0200 (Sa, 06 Jun 2009) | 1 line #6224: s/JPython/Jython/, and remove one link to a module nine years old. ........
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2.2 KiB
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61 lines
2.2 KiB
ReStructuredText
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:mod:`crypt` --- Function to check Unix passwords
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=================================================
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.. module:: crypt
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:platform: Unix
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:synopsis: The crypt() function used to check Unix passwords.
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.. moduleauthor:: Steven D. Majewski <sdm7g@virginia.edu>
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.. sectionauthor:: Steven D. Majewski <sdm7g@virginia.edu>
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.. sectionauthor:: Peter Funk <pf@artcom-gmbh.de>
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.. index::
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single: crypt(3)
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pair: cipher; DES
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This module implements an interface to the :manpage:`crypt(3)` routine, which is
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a one-way hash function based upon a modified DES algorithm; see the Unix man
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page for further details. Possible uses include allowing Python scripts to
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accept typed passwords from the user, or attempting to crack Unix passwords with
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a dictionary.
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.. index:: single: crypt(3)
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Notice that the behavior of this module depends on the actual implementation of
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the :manpage:`crypt(3)` routine in the running system. Therefore, any
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extensions available on the current implementation will also be available on
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this module.
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.. function:: crypt(word, salt)
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*word* will usually be a user's password as typed at a prompt or in a graphical
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interface. *salt* is usually a random two-character string which will be used
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to perturb the DES algorithm in one of 4096 ways. The characters in *salt* must
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be in the set ``[./a-zA-Z0-9]``. Returns the hashed password as a string, which
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will be composed of characters from the same alphabet as the salt (the first two
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characters represent the salt itself).
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.. index:: single: crypt(3)
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Since a few :manpage:`crypt(3)` extensions allow different values, with
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different sizes in the *salt*, it is recommended to use the full crypted
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password as salt when checking for a password.
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A simple example illustrating typical use::
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import crypt, getpass, pwd
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def login():
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username = raw_input('Python login:')
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cryptedpasswd = pwd.getpwnam(username)[1]
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if cryptedpasswd:
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if cryptedpasswd == 'x' or cryptedpasswd == '*':
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raise NotImplementedError(
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"Sorry, currently no support for shadow passwords")
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cleartext = getpass.getpass()
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return crypt.crypt(cleartext, cryptedpasswd) == cryptedpasswd
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else:
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return 1
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