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annotate roundup/password.py @ 6681:ab2ed11c021e

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issue2551205: Add support for specifying valid origins for api: xmlrpc/rest We now have an allow list to filter the hosts allowed to do api requests. An element of this allow list must match the http ORIGIN header exactly or the rest/xmlrpc CORS request will result in an error. The tracker host is always allowed to do a request.
author John Rouillard <rouilj@ieee.org>
date Tue, 17 May 2022 17:18:51 -0400
parents 120b0bb05b6e
children 469ad03e6cb8
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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 try:
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30 import crypt
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31 except ImportError:
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32 crypt = None
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33
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34 _bempty = b""
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35 _bjoin = _bempty.join
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36
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37
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38 def bchr(c):
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39 if bytes == str:
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40 # Python 2.
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41 return chr(c)
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42 else:
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43 # Python 3.
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44 return bytes((c,))
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45
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46
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47 def bord(c):
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48 if bytes == str:
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49 # Python 2.
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50 return ord(c)
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51 else:
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52 # Python 3. Elements of bytes are integers.
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53 return c
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55
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56 # NOTE: PBKDF2 hash is using this variant of base64 to minimize encoding size,
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57 # and have charset that's compatible w/ unix crypt variants
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58 def h64encode(data):
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59 """encode using variant of base64"""
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60 return b2s(b64encode(data, b"./").strip(b"=\n"))
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62
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63 def h64decode(data):
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64 """decode using variant of base64"""
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65 data = s2b(data)
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66 off = len(data) % 4
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67 if off == 0:
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68 return b64decode(data, b"./")
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69 elif off == 1:
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70 raise ValueError("Invalid base64 input")
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71 elif off == 2:
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72 return b64decode(data + b"==", b"./")
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73 else:
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74 return b64decode(data + b"=", b"./")
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75
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76
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77 try:
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78 from hashlib import pbkdf2_hmac
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79
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80 def _pbkdf2(password, salt, rounds, keylen):
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81 return pbkdf2_hmac('sha1', password, salt, rounds, keylen)
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82 except ImportError:
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83 # no hashlib.pbkdf2_hmac - make our own pbkdf2 function
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84 from struct import pack
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85 from hmac import HMAC
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86
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87 def xor_bytes(left, right):
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88 "perform bitwise-xor of two byte-strings"
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89 return _bjoin(bchr(bord(l) ^ bord(r)) for l, r in zip(left, right))
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90
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91 def _pbkdf2(password, salt, rounds, keylen):
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92 digest_size = 20 # sha1 generates 20-byte blocks
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93 total_blocks = int((keylen+digest_size-1)/digest_size)
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94 hmac_template = HMAC(password, None, sha1)
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95 out = _bempty
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96 for i in range(1, total_blocks+1):
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97 hmac = hmac_template.copy()
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98 hmac.update(salt + pack(">L", i))
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99 block = tmp = hmac.digest()
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100 for _j in range(rounds-1):
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101 hmac = hmac_template.copy()
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102 hmac.update(tmp)
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103 tmp = hmac.digest()
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104 # TODO: need to speed up this call
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105 block = xor_bytes(block, tmp)
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106 out += block
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107 return out[:keylen]
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108
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109
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110 def ssha(password, salt):
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111 ''' Make ssha digest from password and salt.
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112 Based on code of Roberto Aguilar <roberto@baremetal.io>
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113 https://gist.github.com/rca/7217540
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114 '''
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115 shaval = sha1(password) # nosec
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116 shaval.update(salt)
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117 ssha_digest = b2s(b64encode(shaval.digest() + salt).strip())
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118 return ssha_digest
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119
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120
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121 def pbkdf2(password, salt, rounds, keylen):
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122 """pkcs#5 password-based key derivation v2.0
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123
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124 :arg password: passphrase to use to generate key (if unicode,
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125 converted to utf-8)
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126 :arg salt: salt bytes to use when generating key
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127 :param rounds: number of rounds to use to generate key
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128 :arg keylen: number of bytes to generate
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129
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130 If hashlib supports pbkdf2, uses it's implementation as backend.
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131
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132 :returns:
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133 raw bytes of generated key
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diff changeset
134 """
5416
56c9bcdea47f Python 3 preparation: unicode.
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parents: 5415
diff changeset
135 password = s2b(us2s(password))
4480
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diff changeset
136 if keylen > 40:
6007
e27a240430b8 flake8 formatting changes.
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parents: 6000
diff changeset
137 # NOTE: pbkdf2 allows up to (2**31-1)*20 bytes,
4480
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parents: 4089
diff changeset
138 # but m2crypto has issues on some platforms above 40,
1613754d2646 Fix first part of Password handling security issue2550688
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diff changeset
139 # 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
140 raise ValueError("key length too large")
4480
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parents: 4089
diff changeset
141 if rounds < 1:
5378
35ea9b1efc14 Python 3 preparation: "raise" syntax.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5356
diff changeset
142 raise ValueError("rounds must be positive number")
4480
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diff changeset
143 return _pbkdf2(password, salt, rounds, keylen)
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diff changeset
144
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parents: 6000
diff changeset
145
1905
dc43e339e607 Centralised conversion of user-input data to hyperdb values
Richard Jones <richard@users.sourceforge.net>
parents: 1583
diff changeset
146 class PasswordValueError(ValueError):
4089
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parents: 3439
diff changeset
147 """ The password value is not valid """
1905
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diff changeset
148 pass
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parents: 1583
diff changeset
149
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parents: 6000
diff changeset
150
4484
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
151 def pbkdf2_unpack(pbkdf2):
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
152 """ 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
153 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
154 """
5416
56c9bcdea47f Python 3 preparation: unicode.
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parents: 5415
diff changeset
155 pbkdf2 = us2s(pbkdf2)
4484
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
156 try:
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
157 rounds, salt, digest = pbkdf2.split("$")
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
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parents: 4483
diff changeset
158 except ValueError:
6007
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John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
159 raise PasswordValueError("invalid PBKDF2 hash (wrong number of "
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
160 "separators)")
4484
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
161 if rounds.startswith("0"):
5378
35ea9b1efc14 Python 3 preparation: "raise" syntax.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5356
diff changeset
162 raise PasswordValueError("invalid PBKDF2 hash (zero-padded rounds)")
4484
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
163 try:
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
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parents: 4483
diff changeset
164 rounds = int(rounds)
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
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parents: 4483
diff changeset
165 except ValueError:
5378
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Joseph Myers <jsm@polyomino.org.uk>
parents: 5356
diff changeset
166 raise PasswordValueError("invalid PBKDF2 hash (invalid rounds)")
4484
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4483
diff changeset
167 raw_salt = h64decode(salt)
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
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parents: 4483
diff changeset
168 return rounds, salt, raw_salt, digest
52e13bf0bb40 Add new config-option 'migrate_passwords' in section 'web'...
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diff changeset
169
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diff changeset
170
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diff changeset
171 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
172 """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
173 """
1343
2e557762ee87 fixed handling of missing password [SF#655632]
Richard Jones <richard@users.sourceforge.net>
parents: 1231
diff changeset
174 if plaintext is None:
2e557762ee87 fixed handling of missing password [SF#655632]
Richard Jones <richard@users.sourceforge.net>
parents: 1231
diff changeset
175 plaintext = ""
4480
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diff changeset
176 if scheme == "PBKDF2":
1613754d2646 Fix first part of Password handling security issue2550688
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diff changeset
177 if other:
4484
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parents: 4483
diff changeset
178 rounds, salt, raw_salt, digest = pbkdf2_unpack(other)
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diff changeset
179 else:
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
180 raw_salt = random_.token_bytes(20)
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diff changeset
181 salt = h64encode(raw_salt)
4486
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diff changeset
182 if config:
693c75d56ebe Add new config-option 'password_pbkdf2_default_rounds'...
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parents: 4485
diff changeset
183 rounds = config.PASSWORD_PBKDF2_DEFAULT_ROUNDS
693c75d56ebe Add new config-option 'password_pbkdf2_default_rounds'...
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parents: 4485
diff changeset
184 else:
693c75d56ebe Add new config-option 'password_pbkdf2_default_rounds'...
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diff changeset
185 rounds = 10000
4480
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diff changeset
186 if rounds < 1000:
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Joseph Myers <jsm@polyomino.org.uk>
parents: 5356
diff changeset
187 raise PasswordValueError("invalid PBKDF2 hash (rounds too low)")
4480
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diff changeset
188 raw_digest = pbkdf2(plaintext, raw_salt, rounds, 20)
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
189 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
190 elif scheme == 'SSHA':
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John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
191 if other:
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
192 raw_other = b64decode(other)
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John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
193 salt = raw_other[20:]
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John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
194 else:
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diff changeset
195 # new password
5053
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parents: 4982
diff changeset
196 # variable salt length
5488
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diff changeset
197 salt_len = random_.randbelow(52-36) + 36
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Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
198 salt = random_.token_bytes(salt_len)
5454
fbbcbfc6dad0 fix encoding for hash functions
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5428
diff changeset
199 s = ssha(s2b(plaintext), salt)
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diff changeset
200 elif scheme == 'SHA':
6000
6c3826600610 Bandit - silence old hash warnings.
John Rouillard <rouilj@ieee.org>
parents: 5630
diff changeset
201 s = sha1(s2b(plaintext)).hexdigest() # nosec
2277
c9e52addda42 added MD5 scheme for password hiding
Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
202 elif scheme == 'MD5':
6000
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John Rouillard <rouilj@ieee.org>
parents: 5630
diff changeset
203 s = md5(s2b(plaintext)).hexdigest() # nosec
6626
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
204 elif scheme == 'crypt':
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
205 if crypt is None:
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
206 raise PasswordValueError(
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
207 'Unsupported encryption scheme %r' % scheme)
1229
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
208 if other is not None:
3434
1f860b50fa5f encodePassword: don't trim the salt string...
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2277
diff changeset
209 salt = other
1229
5c581b120738 added "crypt" password encoding...
Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
210 else:
5415
2d6a92c3e212 Python 3 preparation: use string.ascii_letters instead of string.letters.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5414
diff changeset
211 saltchars = './0123456789'+string.ascii_letters
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
212 salt = random_.choice(saltchars) + random_.choice(saltchars)
1229
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Richard Jones <richard@users.sourceforge.net>
parents: 1090
diff changeset
213 s = crypt.crypt(plaintext, salt)
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
214 elif scheme == 'plaintext':
1229
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parents: 1090
diff changeset
215 s = plaintext
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
216 else:
6007
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John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
217 raise PasswordValueError('Unknown encryption scheme %r' % scheme)
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
218 return s
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
219
6007
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
220
4760
efdce3d32698 Increase generated password length to 12 symbols.
anatoly techtonik <techtonik@gmail.com>
parents: 4683
diff changeset
221 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
222 chars = string.ascii_letters+string.digits
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
223 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
224 # make sure there is at least one digit
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
225 digitidx = random_.randbelow(length)
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents: 5483
diff changeset
226 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
227 return ''.join(password)
1583
caae7d8934dc set new email rego user password to random string
Richard Jones <richard@users.sourceforge.net>
parents: 1343
diff changeset
228
6007
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
229
4483
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
230 class JournalPassword:
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
231 """ 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
232 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
233 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
234 encrypted password.
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
235 """
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
236 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
237 pwre = re.compile(r'{(\w+)}(.+)')
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
238
6007
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John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
239 def __init__(self, encrypted=''):
4483
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
240 if isinstance(encrypted, self.__class__):
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
241 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
242 else:
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
243 m = self.pwre.match(encrypted)
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
244 if m:
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
245 self.scheme = m.group(1)
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 self.scheme = self.default_scheme
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
248 self.password = ''
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
249
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
250 def dummystr(self):
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
251 """ 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
252 - reports scheme, but nothing else
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 return "{%s}*encrypted*" % (self.scheme,)
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
255
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
256 __str__ = dummystr
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
257
5414
3fa026621f69 Python 3 preparation: comparisons.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5391
diff changeset
258 def __eq__(self, other):
4483
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
259 """Compare this password against another password."""
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
260 # 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
261 if isinstance(other, self.__class__):
22bc0426e348 Second patch from issue2550688 -- with some changes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4480
diff changeset
262 if self.scheme != other.scheme:
5414
3fa026621f69 Python 3 preparation: comparisons.
Joseph Myers <jsm@polyomino.org.uk>
parents: 5391
diff changeset
263 return False
3fa026621f69 Python 3 preparation: comparisons.
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parents: 5391
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264 return self.password == other.password
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265
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266 # assume password is plaintext
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267 if self.password is None:
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268 raise ValueError('Password not set')
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269 return self.password == encodePassword(other, self.scheme,
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270 self.password or None)
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271
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272 def __ne__(self, other):
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273 return not self.__eq__(other)
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274
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275
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276 class Password(JournalPassword):
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277 """The class encapsulates a Password property type value in the database.
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278
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279 The encoding of the password is one if None, 'SHA', 'MD5' or 'plaintext'.
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280 The encodePassword function is used to actually encode the password from
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281 plaintext. The None encoding is used in legacy databases where no
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282 encoding scheme is identified.
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283
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284 The scheme is stored with the encoded data in the database:
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285 {scheme}data
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286
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287 Example usage:
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288 >>> p = Password('sekrit')
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289 >>> p == 'sekrit'
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290 1
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291 >>> p != 'not sekrit'
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292 1
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293 >>> 'sekrit' == p
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294 1
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295 >>> 'not sekrit' != p
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296 1
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297 """
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298 # TODO: code to migrate from old password schemes.
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299
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300 deprecated_schemes = ["SHA", "MD5", "crypt", "plaintext"]
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301 known_schemes = ["PBKDF2", "SSHA"] + deprecated_schemes
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302
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303 def __init__(self, plaintext=None, scheme=None, encrypted=None,
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304 strict=False, config=None):
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305 """Call setPassword if plaintext is not None."""
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306 if scheme is None:
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307 scheme = self.default_scheme
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308 if plaintext is not None:
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309 self.setPassword(plaintext, scheme, config=config)
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diff changeset
310 elif encrypted is not None:
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311 self.unpack(encrypted, scheme, strict=strict, config=config)
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312 else:
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313 self.scheme = self.default_scheme
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314 self.password = None
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315 self.plaintext = None
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316
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317 def __repr__(self):
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318 return self.__str__()
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319
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320 def needs_migration(self):
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321 """ Password has insecure scheme or other insecure parameters
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diff changeset
322 and needs migration to new password scheme
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323 """
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diff changeset
324 if self.scheme in self.deprecated_schemes:
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325 return True
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diff changeset
326 rounds, salt, raw_salt, digest = pbkdf2_unpack(self.password)
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327 if rounds < 1000:
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328 return True
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diff changeset
329 return False
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diff changeset
330
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331 def unpack(self, encrypted, scheme=None, strict=False, config=None):
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332 """Set the password info from the scheme:<encryted info> string
270
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333 (the inverse of __str__)
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334 """
270
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335 m = self.pwre.match(encrypted)
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336 if m:
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337 self.scheme = m.group(1)
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338 self.password = m.group(2)
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339 self.plaintext = None
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340 else:
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341 # currently plaintext - encrypt
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342 self.setPassword(encrypted, scheme, config=config)
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343 if strict and self.scheme not in self.known_schemes:
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344 raise PasswordValueError("Unknown encryption scheme: %r" %
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345 (self.scheme,))
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346
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347 def setPassword(self, plaintext, scheme=None, config=None):
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348 """Sets encrypts plaintext."""
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349 if scheme is None:
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350 scheme = self.default_scheme
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351 self.scheme = scheme
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352 self.password = encodePassword(plaintext, scheme, config=config)
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353 self.plaintext = plaintext
270
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354
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diff changeset
355 def __str__(self):
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356 """Stringify the encrypted password for database storage."""
270
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357 if self.password is None:
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diff changeset
358 raise ValueError('Password not set')
6007
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diff changeset
359 return '{%s}%s' % (self.scheme, self.password)
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parents: 6000
diff changeset
360
6626
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
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diff changeset
361 def test_missing_crypt():
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
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diff changeset
362 p = encodePassword('sekrit', 'crypt')
270
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parents:
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363
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parents:
diff changeset
364 def test():
1229
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365 # SHA
270
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366 p = Password('sekrit')
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Christof Meerwald <cmeerw@cmeerw.org>
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diff changeset
367 assert Password(encrypted=str(p)) == 'sekrit'
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368 assert 'sekrit' == Password(encrypted=str(p))
270
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diff changeset
369 assert p == 'sekrit'
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parents:
diff changeset
370 assert p != 'not sekrit'
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parents:
diff changeset
371 assert 'sekrit' == p
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parents:
diff changeset
372 assert 'not sekrit' != p
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parents:
diff changeset
373
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diff changeset
374 # MD5
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diff changeset
375 p = Password('sekrit', 'MD5')
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diff changeset
376 assert Password(encrypted=str(p)) == 'sekrit'
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377 assert 'sekrit' == Password(encrypted=str(p))
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diff changeset
378 assert p == 'sekrit'
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diff changeset
379 assert p != 'not sekrit'
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Richard Jones <richard@users.sourceforge.net>
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diff changeset
380 assert 'sekrit' == p
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Richard Jones <richard@users.sourceforge.net>
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diff changeset
381 assert 'not sekrit' != p
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diff changeset
382
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diff changeset
383 # crypt
4683
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anatoly techtonik <techtonik@gmail.com>
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diff changeset
384 if crypt: # not available on Windows
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anatoly techtonik <techtonik@gmail.com>
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diff changeset
385 p = Password('sekrit', 'crypt')
6146
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diff changeset
386 assert Password(encrypted=str(p)) == 'sekrit'
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parents: 6007
diff changeset
387 assert 'sekrit' == Password(encrypted=str(p))
4683
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anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
388 assert p == 'sekrit'
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anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
389 assert p != 'not sekrit'
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anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
390 assert 'sekrit' == p
2f66d44616ad windows: Fix failing password tests due to missing crypt module
anatoly techtonik <techtonik@gmail.com>
parents: 4570
diff changeset
391 assert 'not sekrit' != p
1229
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diff changeset
392
5053
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diff changeset
393 # SSHA
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diff changeset
394 p = Password('sekrit', 'SSHA')
6146
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Christof Meerwald <cmeerw@cmeerw.org>
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diff changeset
395 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
396 assert 'sekrit' == Password(encrypted=str(p))
5053
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John Rouillard <rouilj@ieee.org>
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diff changeset
397 assert p == 'sekrit'
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John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
398 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
399 assert 'sekrit' == p
9792b18e0b19 issue 2550880: Ability to choose password store scheme and SSHA support.
John Rouillard <rouilj@ieee.org>
parents: 4982
diff changeset
400 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
401
4480
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
402 # PBKDF2 - low level function
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
403 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
404 k = pbkdf2("password", b"ATHENA.MIT.EDUraeburn", 1200, 32)
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1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
405 assert k == unhexlify("5c08eb61fdf71e4e4ec3cf6ba1f5512ba7e52ddbc5e5142f708a31e2e62b1e13")
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
406
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
407 # PBKDF2 - hash function
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
408 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
409 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
410
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
411 # PBKDF2 - high level integration
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
412 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
413 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
414 assert 'sekrit' == Password(encrypted=str(p))
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1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
415 assert p == 'sekrit'
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
416 assert p != 'not sekrit'
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
417 assert 'sekrit' == p
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
418 assert 'not sekrit' != p
1613754d2646 Fix first part of Password handling security issue2550688
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 4089
diff changeset
419
6007
e27a240430b8 flake8 formatting changes.
John Rouillard <rouilj@ieee.org>
parents: 6000
diff changeset
420
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
421 if __name__ == '__main__':
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
422 test()
6626
120b0bb05b6e issue2551191 - Module deprication PEP 594. crypt
John Rouillard <rouilj@ieee.org>
parents: 6146
diff changeset
423 test_missing_crypt()
270
a4241ddd22d7 Added the Password property type.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
424
3434
1f860b50fa5f encodePassword: don't trim the salt string...
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2277
diff changeset
425 # vim: set filetype=python sts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/