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annotate roundup/password.py @ 6813:6b636fb29740

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Refactor client.py session cookie code. Remove session db access. The original code did a session_db.exists test followed by a session_db.getall. Refactor does a getall and if a KeyError is thrown, handles the error. Most likely the session key will be found so exception handling won't be triggered. Added test case to test the exception code path and minor rearrangement of setup code.
author John Rouillard <rouilj@ieee.org>
date Wed, 03 Aug 2022 17:34:58 -0400
parents 469ad03e6cb8
children aa629aebac41
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rev   line source
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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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79
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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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Christof Meerwald <cmeerw@cmeerw.org>
parents: 5454
diff changeset
134 If hashlib supports pbkdf2, uses it's implementation as backend.
4480
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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
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
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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parents: 4089
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
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
143 # and such sizes aren't needed for a password hash anyways...
5378
35ea9b1efc14 Python 3 preparation: "raise" syntax.
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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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parents: 4089
diff changeset
147 return _pbkdf2(password, salt, rounds, keylen)
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diff changeset
148
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parents: 6000
diff changeset
149
1905
dc43e339e607 Centralised conversion of user-input data to hyperdb values
Richard Jones <richard@users.sourceforge.net>
parents: 1583
diff changeset
150 class PasswordValueError(ValueError):
4089
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Richard Jones <richard@users.sourceforge.net>
parents: 3439
diff changeset
151 """ The password value is not valid """
1905
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Richard Jones <richard@users.sourceforge.net>
parents: 1583
diff changeset
152 pass
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Richard Jones <richard@users.sourceforge.net>
parents: 1583
diff changeset
153
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John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
154
4484
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
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,
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
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
56c9bcdea47f Python 3 preparation: unicode.
Joseph Myers <jsm@polyomino.org.uk>
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("$")
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
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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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
165 if rounds.startswith("0"):
5378
35ea9b1efc14 Python 3 preparation: "raise" syntax.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5356
diff changeset
166 raise PasswordValueError("invalid PBKDF2 hash (zero-padded rounds)")
4484
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
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)
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
169 except ValueError:
5378
35ea9b1efc14 Python 3 preparation: "raise" syntax.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5356
diff changeset
170 raise PasswordValueError("invalid PBKDF2 hash (invalid rounds)")
4484
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
171 raw_salt = h64decode(salt)
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
172 return rounds, salt, raw_salt, digest
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
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parents: 4483
diff changeset
173
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parents: 6000
diff changeset
174
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4485
diff changeset
175 def encodePassword(plaintext, scheme, other=None, config=None):
4089
eddb82d0964c Add compatibility package to allow us to deal with Python versions 2.3..2.6.
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.
Richard Jones <richard@users.sourceforge.net>
parents: 3439
diff changeset
177 """
1343
2e557762ee87 fixed handling of missing password [SF#655632]
Richard Jones <richard@users.sourceforge.net>
parents: 1231
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 = ""
4480
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diff changeset
180 if scheme == "PBKDF2":
1613754d2646 Fix first part of Password handling security issue2550688
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parents: 4089
diff changeset
181 if other:
4484
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parents: 4483
diff changeset
182 rounds, salt, raw_salt, digest = pbkdf2_unpack(other)
4480
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parents: 4089
diff changeset
183 else:
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
184 raw_salt = random_.token_bytes(20)
4480
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parents: 4089
diff changeset
185 salt = h64encode(raw_salt)
4486
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4485
diff changeset
186 if config:
693c75d56ebe Add new config-option 'password_pbkdf2_default_rounds'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4485
diff changeset
187 rounds = config.PASSWORD_PBKDF2_DEFAULT_ROUNDS
693c75d56ebe Add new config-option 'password_pbkdf2_default_rounds'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4485
diff changeset
188 else:
693c75d56ebe Add new config-option 'password_pbkdf2_default_rounds'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4485
diff changeset
189 rounds = 10000
4480
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diff changeset
190 if rounds < 1000:
5378
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Joseph Myers <jsm@polyomino.org.uk>
parents: 5356
diff changeset
191 raise PasswordValueError("invalid PBKDF2 hash (rounds too low)")
4480
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parents: 4089
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
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
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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John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
198 else:
6007
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parents: 6000
diff changeset
199 # new password
5053
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John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
200 # variable salt length
5488
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Christof Meerwald <cmeerw@cmeerw.org>
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)
4480
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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
6c3826600610 Bandit - silence old hash warnings.
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
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
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
e27a240430b8 flake8 formatting changes.
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
e27a240430b8 flake8 formatting changes.
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+)}(.+)')
22bc0426e348 Second patch from issue2550688 -- with some changes:
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>
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264 # check to see if we're comparing instances
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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.
270
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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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diff changeset
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:
4486
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315 self.unpack(encrypted, scheme, strict=strict, config=config)
270
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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
270
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parents:
diff changeset
320
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diff changeset
321 def __repr__(self):
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322 return self.__str__()
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diff changeset
323
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diff changeset
324 def needs_migration(self):
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325 """ Password has insecure scheme or other insecure parameters
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parents: 4483
diff changeset
326 and needs migration to new password scheme
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diff changeset
327 """
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diff changeset
328 if self.scheme in self.deprecated_schemes:
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diff changeset
329 return True
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diff changeset
330 rounds, salt, raw_salt, digest = pbkdf2_unpack(self.password)
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diff changeset
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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parents: 4483
diff changeset
334
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diff changeset
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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diff changeset
337 (the inverse of __str__)
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diff changeset
338 """
270
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339 m = self.pwre.match(encrypted)
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diff changeset
340 if m:
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diff changeset
341 self.scheme = m.group(1)
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diff changeset
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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parents:
diff changeset
345 # currently plaintext - encrypt
4486
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diff changeset
346 self.setPassword(encrypted, scheme, config=config)
4480
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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,))
270
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diff changeset
350
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diff changeset
351 def setPassword(self, plaintext, scheme=None, config=None):
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diff changeset
352 """Sets encrypts plaintext."""
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diff changeset
353 if scheme is None:
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diff changeset
354 scheme = self.default_scheme
3439
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parents: 3434
diff changeset
355 self.scheme = scheme
4486
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parents: 4485
diff changeset
356 self.password = encodePassword(plaintext, scheme, config=config)
3439
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diff changeset
357 self.plaintext = plaintext
270
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parents:
diff changeset
358
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Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
359 def __str__(self):
4089
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diff changeset
360 """Stringify the encrypted password for database storage."""
270
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parents:
diff changeset
361 if self.password is None:
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parents: 5356
diff changeset
362 raise ValueError('Password not set')
6007
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
363 return '{%s}%s' % (self.scheme, self.password)
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
364
6626
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
365 def test_missing_crypt():
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
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diff changeset
366 p = encodePassword('sekrit', 'crypt')
270
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parents:
diff changeset
367
a4241ddd22d7 Added the Password property type.
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parents:
diff changeset
368 def test():
1229
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diff changeset
369 # SHA
270
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parents:
diff changeset
370 p = Password('sekrit')
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Christof Meerwald <cmeerw@cmeerw.org>
parents: 6007
diff changeset
371 assert Password(encrypted=str(p)) == 'sekrit'
01e9634b81a4 fixed string encoding of SSHA encoded passwords in Python 3
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diff changeset
372 assert 'sekrit' == Password(encrypted=str(p))
270
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Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
373 assert p == 'sekrit'
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Richard Jones <richard@users.sourceforge.net>
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
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
376 assert 'not sekrit' != p
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
377
2277
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Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
378 # MD5
c9e52addda42 added MD5 scheme for password hiding
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diff changeset
379 p = Password('sekrit', 'MD5')
6146
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Christof Meerwald <cmeerw@cmeerw.org>
parents: 6007
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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Richard Jones <richard@users.sourceforge.net>
parents: 2098
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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Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
386
1229
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diff changeset
387 # crypt
4683
2f66d44616ad windows: Fix failing password tests due to missing crypt module
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>
parents: 6007
diff changeset
390 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
391 assert 'sekrit' == Password(encrypted=str(p))
4683
2f66d44616ad windows: Fix failing password tests due to missing crypt module
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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parents: 1090
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/