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annotate roundup/password.py @ 3726:b11142bb2aa2 1.2.1

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Password confirm field in user editing. Pre-1.2.1-release stuff too
author Richard Jones <richard@users.sourceforge.net>
date Sat, 07 Oct 2006 03:03:29 +0000
parents 822a2719b81b
children eddb82d0964c
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1 #
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2 # Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
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3 # This module is free software, and you may redistribute it and/or modify
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4 # under the same terms as Python, so long as this copyright message and
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5 # disclaimer are retained in their original form.
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6 #
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7 # IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
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8 # DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
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9 # OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
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10 # POSSIBILITY OF SUCH DAMAGE.
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11 #
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12 # BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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13 # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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14 # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
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15 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
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16 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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17 #
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18 # $Id: password.py,v 1.15 2005-12-25 15:38:40 a1s Exp $
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19
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20 """Password handling (encoding, decoding).
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21 """
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22 __docformat__ = 'restructuredtext'
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23
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24 import sha, md5, re, string, random
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25 try:
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26 import crypt
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27 except:
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28 crypt = None
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29 pass
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30
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31 class PasswordValueError(ValueError):
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32 ''' The password value is not valid '''
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33 pass
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34
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35 def encodePassword(plaintext, scheme, other=None):
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36 '''Encrypt the plaintext password.
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37 '''
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38 if plaintext is None:
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39 plaintext = ""
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40 if scheme == 'SHA':
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41 s = sha.sha(plaintext).hexdigest()
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42 elif scheme == 'MD5':
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43 s = md5.md5(plaintext).hexdigest()
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44 elif scheme == 'crypt' and crypt is not None:
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45 if other is not None:
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46 salt = other
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47 else:
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48 saltchars = './0123456789'+string.letters
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49 salt = random.choice(saltchars) + random.choice(saltchars)
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50 s = crypt.crypt(plaintext, salt)
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51 elif scheme == 'plaintext':
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52 s = plaintext
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53 else:
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54 raise PasswordValueError, 'unknown encryption scheme %r'%scheme
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55 return s
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56
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57 def generatePassword(length=8):
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58 chars = string.letters+string.digits
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59 return ''.join([random.choice(chars) for x in range(length)])
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60
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61 class Password:
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62 '''The class encapsulates a Password property type value in the database.
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63
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64 The encoding of the password is one if None, 'SHA', 'MD5' or 'plaintext'.
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65 The encodePassword function is used to actually encode the password from
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66 plaintext. The None encoding is used in legacy databases where no
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67 encoding scheme is identified.
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68
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69 The scheme is stored with the encoded data in the database:
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70 {scheme}data
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71
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72 Example usage:
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73 >>> p = Password('sekrit')
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74 >>> p == 'sekrit'
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75 1
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76 >>> p != 'not sekrit'
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77 1
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78 >>> 'sekrit' == p
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79 1
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80 >>> 'not sekrit' != p
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81 1
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82 '''
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83
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84 default_scheme = 'SHA' # new encryptions use this scheme
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85 pwre = re.compile(r'{(\w+)}(.+)')
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86
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87 def __init__(self, plaintext=None, scheme=None, encrypted=None):
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88 '''Call setPassword if plaintext is not None.'''
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89 if scheme is None:
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90 scheme = self.default_scheme
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91 if plaintext is not None:
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92 self.setPassword (plaintext, scheme)
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93 elif encrypted is not None:
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94 self.unpack(encrypted, scheme)
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95 else:
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96 self.scheme = self.default_scheme
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97 self.password = None
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98 self.plaintext = None
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99
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100 def unpack(self, encrypted, scheme=None):
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101 '''Set the password info from the scheme:<encryted info> string
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102 (the inverse of __str__)
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103 '''
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104 m = self.pwre.match(encrypted)
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105 if m:
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106 self.scheme = m.group(1)
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107 self.password = m.group(2)
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108 self.plaintext = None
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109 else:
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110 # currently plaintext - encrypt
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111 self.setPassword(encrypted, scheme)
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112
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113 def setPassword(self, plaintext, scheme=None):
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114 '''Sets encrypts plaintext.'''
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115 if scheme is None:
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116 scheme = self.default_scheme
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117 self.scheme = scheme
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118 self.password = encodePassword(plaintext, scheme)
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119 self.plaintext = plaintext
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120
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121 def __cmp__(self, other):
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122 '''Compare this password against another password.'''
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123 # check to see if we're comparing instances
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124 if isinstance(other, Password):
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125 if self.scheme != other.scheme:
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126 return cmp(self.scheme, other.scheme)
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127 return cmp(self.password, other.password)
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128
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129 # assume password is plaintext
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130 if self.password is None:
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131 raise ValueError, 'Password not set'
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132 return cmp(self.password, encodePassword(other, self.scheme,
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133 self.password))
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134
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135 def __str__(self):
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136 '''Stringify the encrypted password for database storage.'''
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137 if self.password is None:
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138 raise ValueError, 'Password not set'
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139 return '{%s}%s'%(self.scheme, self.password)
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140
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141 def test():
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142 # SHA
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143 p = Password('sekrit')
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144 assert p == 'sekrit'
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145 assert p != 'not sekrit'
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Richard Jones <richard@users.sourceforge.net>
parents:
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146 assert 'sekrit' == p
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
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147 assert 'not sekrit' != p
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
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148
2277
c9e52addda42 added MD5 scheme for password hiding
Richard Jones <richard@users.sourceforge.net>
parents: 2098
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149 # MD5
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Richard Jones <richard@users.sourceforge.net>
parents: 2098
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150 p = Password('sekrit', 'MD5')
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Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
151 assert p == 'sekrit'
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Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
152 assert p != 'not sekrit'
c9e52addda42 added MD5 scheme for password hiding
Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
153 assert 'sekrit' == p
c9e52addda42 added MD5 scheme for password hiding
Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
154 assert 'not sekrit' != p
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Richard Jones <richard@users.sourceforge.net>
parents: 2098
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155
1229
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
156 # crypt
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
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157 p = Password('sekrit', 'crypt')
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
158 assert p == 'sekrit'
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
159 assert p != 'not sekrit'
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
160 assert 'sekrit' == p
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
161 assert 'not sekrit' != p
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
162
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
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163 if __name__ == '__main__':
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
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164 test()
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
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165
3434
1f860b50fa5f encodePassword: don't trim the salt string...
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2277
diff changeset
166 # vim: set filetype=python sts=4 sw=4 et si :
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