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annotate roundup/password.py @ 6717:469ad03e6cb8

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Ignore crypt deprication warning I know it's going away. It's guarded by a try block. No need to keep reporting it.
author John Rouillard <rouilj@ieee.org>
date Wed, 22 Jun 2022 15:19:35 -0400
parents 120b0bb05b6e
children aa629aebac41
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 """Password handling (encoding, decoding).
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19 """
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20 __docformat__ = 'restructuredtext'
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21
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22 import re, string
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23 from base64 import b64encode, b64decode
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24 from hashlib import md5, sha1
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25
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26 from roundup.anypy.strings import us2s, b2s, s2b
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27 import roundup.anypy.random_ as random_
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28
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29 import warnings
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30
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31 try:
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32 with warnings.catch_warnings():
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33 warnings.filterwarnings("ignore", category=DeprecationWarning)
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34 import crypt
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35 except ImportError:
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36 crypt = None
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37
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38 _bempty = b""
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39 _bjoin = _bempty.join
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40
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41
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42 def bchr(c):
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43 if bytes == str:
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44 # Python 2.
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45 return chr(c)
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46 else:
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47 # Python 3.
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48 return bytes((c,))
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50
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51 def bord(c):
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52 if bytes == str:
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53 # Python 2.
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54 return ord(c)
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55 else:
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56 # Python 3. Elements of bytes are integers.
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57 return c
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58
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59
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60 # NOTE: PBKDF2 hash is using this variant of base64 to minimize encoding size,
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61 # and have charset that's compatible w/ unix crypt variants
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62 def h64encode(data):
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63 """encode using variant of base64"""
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64 return b2s(b64encode(data, b"./").strip(b"=\n"))
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66
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67 def h64decode(data):
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68 """decode using variant of base64"""
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69 data = s2b(data)
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70 off = len(data) % 4
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71 if off == 0:
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72 return b64decode(data, b"./")
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73 elif off == 1:
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74 raise ValueError("Invalid base64 input")
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75 elif off == 2:
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76 return b64decode(data + b"==", b"./")
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77 else:
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78 return b64decode(data + b"=", b"./")
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80
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81 try:
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82 from hashlib import pbkdf2_hmac
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83
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84 def _pbkdf2(password, salt, rounds, keylen):
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85 return pbkdf2_hmac('sha1', password, salt, rounds, keylen)
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86 except ImportError:
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87 # no hashlib.pbkdf2_hmac - make our own pbkdf2 function
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88 from struct import pack
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89 from hmac import HMAC
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90
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91 def xor_bytes(left, right):
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92 "perform bitwise-xor of two byte-strings"
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93 return _bjoin(bchr(bord(l) ^ bord(r)) for l, r in zip(left, right))
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94
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95 def _pbkdf2(password, salt, rounds, keylen):
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96 digest_size = 20 # sha1 generates 20-byte blocks
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97 total_blocks = int((keylen+digest_size-1)/digest_size)
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98 hmac_template = HMAC(password, None, sha1)
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99 out = _bempty
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100 for i in range(1, total_blocks+1):
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101 hmac = hmac_template.copy()
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102 hmac.update(salt + pack(">L", i))
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103 block = tmp = hmac.digest()
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104 for _j in range(rounds-1):
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105 hmac = hmac_template.copy()
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106 hmac.update(tmp)
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107 tmp = hmac.digest()
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108 # TODO: need to speed up this call
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109 block = xor_bytes(block, tmp)
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110 out += block
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111 return out[:keylen]
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112
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113
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114 def ssha(password, salt):
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115 ''' Make ssha digest from password and salt.
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116 Based on code of Roberto Aguilar <roberto@baremetal.io>
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117 https://gist.github.com/rca/7217540
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118 '''
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119 shaval = sha1(password) # nosec
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120 shaval.update(salt)
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121 ssha_digest = b2s(b64encode(shaval.digest() + salt).strip())
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122 return ssha_digest
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123
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124
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125 def pbkdf2(password, salt, rounds, keylen):
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126 """pkcs#5 password-based key derivation v2.0
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127
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128 :arg password: passphrase to use to generate key (if unicode,
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129 converted to utf-8)
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130 :arg salt: salt bytes to use when generating key
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131 :param rounds: number of rounds to use to generate key
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132 :arg keylen: number of bytes to generate
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133
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134 If hashlib supports pbkdf2, uses it's implementation as backend.
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diff changeset
135
1613754d2646 Fix first part of Password handling security issue2550688
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parents: 4089
diff changeset
136 :returns:
1613754d2646 Fix first part of Password handling security issue2550688
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parents: 4089
diff changeset
137 raw bytes of generated key
1613754d2646 Fix first part of Password handling security issue2550688
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diff changeset
138 """
5416
56c9bcdea47f Python 3 preparation: unicode.
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parents: 5415
diff changeset
139 password = s2b(us2s(password))
4480
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diff changeset
140 if keylen > 40:
6007
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
141 # NOTE: pbkdf2 allows up to (2**31-1)*20 bytes,
4480
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parents: 4089
diff changeset
142 # but m2crypto has issues on some platforms above 40,
1613754d2646 Fix first part of Password handling security issue2550688
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parents: 4089
diff changeset
143 # and such sizes aren't needed for a password hash anyways...
5378
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parents: 5356
diff changeset
144 raise ValueError("key length too large")
4480
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parents: 4089
diff changeset
145 if rounds < 1:
5378
35ea9b1efc14 Python 3 preparation: "raise" syntax.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5356
diff changeset
146 raise ValueError("rounds must be positive number")
4480
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diff changeset
147 return _pbkdf2(password, salt, rounds, keylen)
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148
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diff changeset
149
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parents: 1583
diff changeset
150 class PasswordValueError(ValueError):
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parents: 3439
diff changeset
151 """ The password value is not valid """
1905
dc43e339e607 Centralised conversion of user-input data to hyperdb values
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parents: 1583
diff changeset
152 pass
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parents: 1583
diff changeset
153
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parents: 6000
diff changeset
154
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parents: 4483
diff changeset
155 def pbkdf2_unpack(pbkdf2):
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
156 """ unpack pbkdf2 encrypted password into parts,
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
157 assume it has format "{rounds}${salt}${digest}
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
158 """
5416
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parents: 5415
diff changeset
159 pbkdf2 = us2s(pbkdf2)
4484
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parents: 4483
diff changeset
160 try:
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
161 rounds, salt, digest = pbkdf2.split("$")
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parents: 4483
diff changeset
162 except ValueError:
6007
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John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
163 raise PasswordValueError("invalid PBKDF2 hash (wrong number of "
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
164 "separators)")
4484
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parents: 4483
diff changeset
165 if rounds.startswith("0"):
5378
35ea9b1efc14 Python 3 preparation: "raise" syntax.
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parents: 5356
diff changeset
166 raise PasswordValueError("invalid PBKDF2 hash (zero-padded rounds)")
4484
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parents: 4483
diff changeset
167 try:
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
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parents: 4483
diff changeset
168 rounds = int(rounds)
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parents: 4483
diff changeset
169 except ValueError:
5378
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parents: 5356
diff changeset
170 raise PasswordValueError("invalid PBKDF2 hash (invalid rounds)")
4484
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parents: 4483
diff changeset
171 raw_salt = h64decode(salt)
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parents: 4483
diff changeset
172 return rounds, salt, raw_salt, digest
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173
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174
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diff changeset
175 def encodePassword(plaintext, scheme, other=None, config=None):
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Richard Jones <richard@users.sourceforge.net>
parents: 3439
diff changeset
176 """Encrypt the plaintext password.
eddb82d0964c Add compatibility package to allow us to deal with Python versions 2.3..2.6.
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parents: 3439
diff changeset
177 """
1343
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diff changeset
178 if plaintext is None:
2e557762ee87 fixed handling of missing password [SF#655632]
Richard Jones <richard@users.sourceforge.net>
parents: 1231
diff changeset
179 plaintext = ""
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180 if scheme == "PBKDF2":
1613754d2646 Fix first part of Password handling security issue2550688
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diff changeset
181 if other:
4484
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parents: 4483
diff changeset
182 rounds, salt, raw_salt, digest = pbkdf2_unpack(other)
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diff changeset
183 else:
5488
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Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
184 raw_salt = random_.token_bytes(20)
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diff changeset
185 salt = h64encode(raw_salt)
4486
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diff changeset
186 if config:
693c75d56ebe Add new config-option 'password_pbkdf2_default_rounds'...
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parents: 4485
diff changeset
187 rounds = config.PASSWORD_PBKDF2_DEFAULT_ROUNDS
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parents: 4485
diff changeset
188 else:
693c75d56ebe Add new config-option 'password_pbkdf2_default_rounds'...
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diff changeset
189 rounds = 10000
4480
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190 if rounds < 1000:
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parents: 5356
diff changeset
191 raise PasswordValueError("invalid PBKDF2 hash (rounds too low)")
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diff changeset
192 raw_digest = pbkdf2(plaintext, raw_salt, rounds, 20)
1613754d2646 Fix first part of Password handling security issue2550688
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parents: 4089
diff changeset
193 return "%d$%s$%s" % (rounds, salt, h64encode(raw_digest))
5053
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John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
194 elif scheme == 'SSHA':
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John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
195 if other:
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
196 raw_other = b64decode(other)
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
197 salt = raw_other[20:]
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parents: 4982
diff changeset
198 else:
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199 # new password
5053
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parents: 4982
diff changeset
200 # variable salt length
5488
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parents: 5483
diff changeset
201 salt_len = random_.randbelow(52-36) + 36
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
202 salt = random_.token_bytes(salt_len)
5454
fbbcbfc6dad0 fix encoding for hash functions
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5428
diff changeset
203 s = ssha(s2b(plaintext), salt)
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parents: 4089
diff changeset
204 elif scheme == 'SHA':
6000
6c3826600610 Bandit - silence old hash warnings.
John Rouillard <rouilj@ieee.org>
parents: 5630
diff changeset
205 s = sha1(s2b(plaintext)).hexdigest() # nosec
2277
c9e52addda42 added MD5 scheme for password hiding
Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
206 elif scheme == 'MD5':
6000
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John Rouillard <rouilj@ieee.org>
parents: 5630
diff changeset
207 s = md5(s2b(plaintext)).hexdigest() # nosec
6626
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
208 elif scheme == 'crypt':
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
209 if crypt is None:
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
210 raise PasswordValueError(
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
211 'Unsupported encryption scheme %r' % scheme)
1229
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
212 if other is not None:
3434
1f860b50fa5f encodePassword: don't trim the salt string...
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2277
diff changeset
213 salt = other
1229
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
214 else:
5415
2d6a92c3e212 Python 3 preparation: use string.ascii_letters instead of string.letters.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5414
diff changeset
215 saltchars = './0123456789'+string.ascii_letters
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
216 salt = random_.choice(saltchars) + random_.choice(saltchars)
1229
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Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
217 s = crypt.crypt(plaintext, salt)
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
218 elif scheme == 'plaintext':
1229
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parents: 1090
diff changeset
219 s = plaintext
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
220 else:
6007
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John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
221 raise PasswordValueError('Unknown encryption scheme %r' % scheme)
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
222 return s
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
223
6007
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
224
4760
efdce3d32698 Increase generated password length to 12 symbols.
anatoly techtonik <techtonik@gmail.com>
parents: 4683
diff changeset
225 def generatePassword(length=12):
5415
2d6a92c3e212 Python 3 preparation: use string.ascii_letters instead of string.letters.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5414
diff changeset
226 chars = string.ascii_letters+string.digits
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
227 password = [random_.choice(chars) for x in range(length - 1)]
4760
efdce3d32698 Increase generated password length to 12 symbols.
anatoly techtonik <techtonik@gmail.com>
parents: 4683
diff changeset
228 # make sure there is at least one digit
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
229 digitidx = random_.randbelow(length)
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
230 password[digitidx:digitidx] = [random_.choice(string.digits)]
4760
efdce3d32698 Increase generated password length to 12 symbols.
anatoly techtonik <techtonik@gmail.com>
parents: 4683
diff changeset
231 return ''.join(password)
1583
caae7d8934dc set new email rego user password to random string
Richard Jones <richard@users.sourceforge.net>
parents: 1343
diff changeset
232
6007
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John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
233
4483
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
234 class JournalPassword:
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
235 """ Password dummy instance intended for journal operation.
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
236 We do not store passwords in the journal any longer. The dummy
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
237 version only reads the encryption scheme from the given
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
238 encrypted password.
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
239 """
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
240 default_scheme = 'PBKDF2' # new encryptions use this scheme
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
241 pwre = re.compile(r'{(\w+)}(.+)')
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
242
6007
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John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
243 def __init__(self, encrypted=''):
4483
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
244 if isinstance(encrypted, self.__class__):
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
245 self.scheme = encrypted.scheme or self.default_scheme
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
246 else:
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
247 m = self.pwre.match(encrypted)
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
248 if m:
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
249 self.scheme = m.group(1)
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
250 else:
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
251 self.scheme = self.default_scheme
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
252 self.password = ''
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
253
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
254 def dummystr(self):
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
255 """ return dummy string to store in journal
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
256 - reports scheme, but nothing else
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
257 """
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
258 return "{%s}*encrypted*" % (self.scheme,)
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
259
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
260 __str__ = dummystr
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
261
5414
3fa026621f69 Python 3 preparation: comparisons.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5391
diff changeset
262 def __eq__(self, other):
4483
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
263 """Compare this password against another password."""
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
264 # check to see if we're comparing instances
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
265 if isinstance(other, self.__class__):
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266 if self.scheme != other.scheme:
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267 return False
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268 return self.password == other.password
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269
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270 # assume password is plaintext
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271 if self.password is None:
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272 raise ValueError('Password not set')
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273 return self.password == encodePassword(other, self.scheme,
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274 self.password or None)
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275
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276 def __ne__(self, other):
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277 return not self.__eq__(other)
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278
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279
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280 class Password(JournalPassword):
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281 """The class encapsulates a Password property type value in the database.
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282
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283 The encoding of the password is one if None, 'SHA', 'MD5' or 'plaintext'.
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284 The encodePassword function is used to actually encode the password from
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285 plaintext. The None encoding is used in legacy databases where no
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286 encoding scheme is identified.
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287
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288 The scheme is stored with the encoded data in the database:
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289 {scheme}data
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290
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291 Example usage:
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292 >>> p = Password('sekrit')
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293 >>> p == 'sekrit'
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294 1
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295 >>> p != 'not sekrit'
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296 1
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297 >>> 'sekrit' == p
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298 1
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299 >>> 'not sekrit' != p
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300 1
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301 """
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302 # TODO: code to migrate from old password schemes.
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303
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304 deprecated_schemes = ["SHA", "MD5", "crypt", "plaintext"]
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305 known_schemes = ["PBKDF2", "SSHA"] + deprecated_schemes
270
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306
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307 def __init__(self, plaintext=None, scheme=None, encrypted=None,
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308 strict=False, config=None):
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309 """Call setPassword if plaintext is not None."""
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310 if scheme is None:
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311 scheme = self.default_scheme
270
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312 if plaintext is not None:
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313 self.setPassword(plaintext, scheme, config=config)
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diff changeset
314 elif encrypted is not None:
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315 self.unpack(encrypted, scheme, strict=strict, config=config)
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316 else:
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317 self.scheme = self.default_scheme
270
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318 self.password = None
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319 self.plaintext = None
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320
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321 def __repr__(self):
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322 return self.__str__()
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323
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324 def needs_migration(self):
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325 """ Password has insecure scheme or other insecure parameters
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diff changeset
326 and needs migration to new password scheme
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327 """
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328 if self.scheme in self.deprecated_schemes:
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329 return True
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diff changeset
330 rounds, salt, raw_salt, digest = pbkdf2_unpack(self.password)
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331 if rounds < 1000:
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diff changeset
332 return True
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diff changeset
333 return False
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diff changeset
334
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335 def unpack(self, encrypted, scheme=None, strict=False, config=None):
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336 """Set the password info from the scheme:<encryted info> string
270
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337 (the inverse of __str__)
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338 """
270
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339 m = self.pwre.match(encrypted)
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340 if m:
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341 self.scheme = m.group(1)
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342 self.password = m.group(2)
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343 self.plaintext = None
270
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344 else:
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345 # currently plaintext - encrypt
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346 self.setPassword(encrypted, scheme, config=config)
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diff changeset
347 if strict and self.scheme not in self.known_schemes:
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diff changeset
348 raise PasswordValueError("Unknown encryption scheme: %r" %
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diff changeset
349 (self.scheme,))
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diff changeset
350
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351 def setPassword(self, plaintext, scheme=None, config=None):
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352 """Sets encrypts plaintext."""
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353 if scheme is None:
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diff changeset
354 scheme = self.default_scheme
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diff changeset
355 self.scheme = scheme
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diff changeset
356 self.password = encodePassword(plaintext, scheme, config=config)
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diff changeset
357 self.plaintext = plaintext
270
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358
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diff changeset
359 def __str__(self):
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diff changeset
360 """Stringify the encrypted password for database storage."""
270
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diff changeset
361 if self.password is None:
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diff changeset
362 raise ValueError('Password not set')
6007
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John Rouillard <rouilj@ieee.org>
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diff changeset
363 return '{%s}%s' % (self.scheme, self.password)
e27a240430b8 flake8 formatting changes.
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parents: 6000
diff changeset
364
6626
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John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
365 def test_missing_crypt():
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diff changeset
366 p = encodePassword('sekrit', 'crypt')
270
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parents:
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367
a4241ddd22d7 Added the Password property type.
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parents:
diff changeset
368 def test():
1229
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369 # SHA
270
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370 p = Password('sekrit')
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Christof Meerwald <cmeerw@cmeerw.org>
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diff changeset
371 assert Password(encrypted=str(p)) == 'sekrit'
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diff changeset
372 assert 'sekrit' == Password(encrypted=str(p))
270
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parents:
diff changeset
373 assert p == 'sekrit'
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parents:
diff changeset
374 assert p != 'not sekrit'
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Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
375 assert 'sekrit' == p
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parents:
diff changeset
376 assert 'not sekrit' != p
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parents:
diff changeset
377
2277
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diff changeset
378 # MD5
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diff changeset
379 p = Password('sekrit', 'MD5')
6146
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diff changeset
380 assert Password(encrypted=str(p)) == 'sekrit'
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diff changeset
381 assert 'sekrit' == Password(encrypted=str(p))
2277
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diff changeset
382 assert p == 'sekrit'
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diff changeset
383 assert p != 'not sekrit'
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Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
384 assert 'sekrit' == p
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Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
385 assert 'not sekrit' != p
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parents: 2098
diff changeset
386
1229
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diff changeset
387 # crypt
4683
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anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
388 if crypt: # not available on Windows
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anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
389 p = Password('sekrit', 'crypt')
6146
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Christof Meerwald <cmeerw@cmeerw.org>
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diff changeset
390 assert Password(encrypted=str(p)) == 'sekrit'
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Christof Meerwald <cmeerw@cmeerw.org>
parents: 6007
diff changeset
391 assert 'sekrit' == Password(encrypted=str(p))
4683
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anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
392 assert p == 'sekrit'
2f66d44616ad windows: Fix failing password tests due to missing crypt module
anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
393 assert p != 'not sekrit'
2f66d44616ad windows: Fix failing password tests due to missing crypt module
anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
394 assert 'sekrit' == p
2f66d44616ad windows: Fix failing password tests due to missing crypt module
anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
395 assert 'not sekrit' != p
1229
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diff changeset
396
5053
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
397 # SSHA
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
398 p = Password('sekrit', 'SSHA')
6146
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Christof Meerwald <cmeerw@cmeerw.org>
parents: 6007
diff changeset
399 assert Password(encrypted=str(p)) == 'sekrit'
01e9634b81a4 fixed string encoding of SSHA encoded passwords in Python 3
Christof Meerwald <cmeerw@cmeerw.org>
parents: 6007
diff changeset
400 assert 'sekrit' == Password(encrypted=str(p))
5053
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
401 assert p == 'sekrit'
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
402 assert p != 'not sekrit'
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
403 assert 'sekrit' == p
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
404 assert 'not sekrit' != p
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
405
4480
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
406 # PBKDF2 - low level function
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
407 from binascii import unhexlify
5428
1f1899658115 Python 3 preparation: use bytes more in password handling.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5416
diff changeset
408 k = pbkdf2("password", b"ATHENA.MIT.EDUraeburn", 1200, 32)
4480
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
409 assert k == unhexlify("5c08eb61fdf71e4e4ec3cf6ba1f5512ba7e52ddbc5e5142f708a31e2e62b1e13")
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
410
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
411 # PBKDF2 - hash function
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
412 h = "5000$7BvbBq.EZzz/O0HuwX3iP.nAG3s$g3oPnFFaga2BJaX5PoPRljl4XIE"
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
413 assert encodePassword("sekrit", "PBKDF2", h) == h
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
414
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
415 # PBKDF2 - high level integration
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
416 p = Password('sekrit', 'PBKDF2')
6146
01e9634b81a4 fixed string encoding of SSHA encoded passwords in Python 3
Christof Meerwald <cmeerw@cmeerw.org>
parents: 6007
diff changeset
417 assert Password(encrypted=str(p)) == 'sekrit'
01e9634b81a4 fixed string encoding of SSHA encoded passwords in Python 3
Christof Meerwald <cmeerw@cmeerw.org>
parents: 6007
diff changeset
418 assert 'sekrit' == Password(encrypted=str(p))
4480
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
419 assert p == 'sekrit'
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
420 assert p != 'not sekrit'
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
421 assert 'sekrit' == p
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
422 assert 'not sekrit' != p
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
423
6007
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
424
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
425 if __name__ == '__main__':
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
426 test()
6626
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
427 test_missing_crypt()
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
428
3434
1f860b50fa5f encodePassword: don't trim the salt string...
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2277
diff changeset
429 # vim: set filetype=python sts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/