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annotate rhodecode/lib/auth.py @ 699:52da7cba88a6 beta

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Code refactor for auth func, preparing for ldap support css updates. turned off graph,and branches for git changelog
author Marcin Kuzminski <marcin@python-works.com>
date Tue, 16 Nov 2010 08:52:31 +0100
parents cb0d9ce6ac5c
children 9e9f1b919c0c
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1 #!/usr/bin/env python
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2 # encoding: utf-8
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3 # authentication and permission libraries
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4 # Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>
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5 #
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6 # This program is free software; you can redistribute it and/or
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7 # modify it under the terms of the GNU General Public License
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8 # as published by the Free Software Foundation; version 2
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9 # of the License or (at your opinion) any later version of the license.
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10 #
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU General Public License for more details.
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15 #
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16 # You should have received a copy of the GNU General Public License
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17 # along with this program; if not, write to the Free Software
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18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 # MA 02110-1301, USA.
381
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20 """
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21 Created on April 4, 2010
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22
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23 @author: marcink
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24 """
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25 from pylons import config, session, url, request
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26 from pylons.controllers.util import abort, redirect
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27 from rhodecode.lib.utils import get_repo_slug
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28 from rhodecode.model import meta
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29 from rhodecode.model.user import UserModel
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30 from rhodecode.model.caching_query import FromCache
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31 from rhodecode.model.db import User, RepoToPerm, Repository, Permission, \
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32 UserToPerm
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33 import bcrypt
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34 from decorator import decorator
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35 import logging
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36 import random
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37
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38 log = logging.getLogger(__name__)
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39
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40 class PasswordGenerator(object):
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41 """This is a simple class for generating password from
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42 different sets of characters
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43 usage:
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44 passwd_gen = PasswordGenerator()
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45 #print 8-letter password containing only big and small letters of alphabet
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46 print passwd_gen.gen_password(8, passwd_gen.ALPHABETS_BIG_SMALL)
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47 """
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48 ALPHABETS_NUM = r'''1234567890'''#[0]
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49 ALPHABETS_SMALL = r'''qwertyuiopasdfghjklzxcvbnm'''#[1]
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50 ALPHABETS_BIG = r'''QWERTYUIOPASDFGHJKLZXCVBNM'''#[2]
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51 ALPHABETS_SPECIAL = r'''`-=[]\;',./~!@#$%^&*()_+{}|:"<>?''' #[3]
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52 ALPHABETS_FULL = ALPHABETS_BIG + ALPHABETS_SMALL + ALPHABETS_NUM + ALPHABETS_SPECIAL#[4]
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53 ALPHABETS_ALPHANUM = ALPHABETS_BIG + ALPHABETS_SMALL + ALPHABETS_NUM#[5]
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54 ALPHABETS_BIG_SMALL = ALPHABETS_BIG + ALPHABETS_SMALL
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55 ALPHABETS_ALPHANUM_BIG = ALPHABETS_BIG + ALPHABETS_NUM#[6]
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56 ALPHABETS_ALPHANUM_SMALL = ALPHABETS_SMALL + ALPHABETS_NUM#[7]
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57
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58 def __init__(self, passwd=''):
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59 self.passwd = passwd
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60
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61 def gen_password(self, len, type):
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62 self.passwd = ''.join([random.choice(type) for _ in xrange(len)])
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63 return self.passwd
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64
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65
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66 def get_crypt_password(password):
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67 """Cryptographic function used for password hashing based on sha1
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68 :param password: password to hash
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69 """
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70 return bcrypt.hashpw(password, bcrypt.gensalt(10))
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71
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72 def check_password(password, hashed):
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73 return bcrypt.hashpw(password, hashed) == hashed
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74
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75 def authfunc(environ, username, password):
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76 """
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77 Authentication function used in Mercurial/Git/ and access controll,
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78 firstly checks for db authentication then if ldap is enabled for ldap
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79 authentication
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80 :param environ: needed only for using in Basic auth, can be None
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81 :param username: username
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82 :param password: password
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83 """
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84
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85 user = UserModel().get_by_username(username, cache=False)
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86
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87 if user:
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88 if user.active:
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89
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90 if user.username == 'default' and user.active:
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91 log.info('user %s authenticated correctly', username)
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92 return True
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93
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94 elif user.username == username and check_password(password, user.password):
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95 log.info('user %s authenticated correctly', username)
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96 return True
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97 else:
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98 log.error('user %s is disabled', username)
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99
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100 return False
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101
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102 class AuthUser(object):
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103 """
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104 A simple object that handles a mercurial username for authentication
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105 """
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106 def __init__(self):
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107 self.username = 'None'
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108 self.name = ''
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109 self.lastname = ''
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110 self.email = ''
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111 self.user_id = None
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112 self.is_authenticated = False
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113 self.is_admin = False
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114 self.permissions = {}
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115
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116 def __repr__(self):
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117 return "<AuthUser('id:%s:%s')>" % (self.user_id, self.username)
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118
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119 def set_available_permissions(config):
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120 """
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121 This function will propagate pylons globals with all available defined
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122 permission given in db. We don't wannt to check each time from db for new
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123 permissions since adding a new permission also requires application restart
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124 ie. to decorate new views with the newly created permission
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125 :param config:
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126 """
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127 log.info('getting information about all available permissions')
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128 try:
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129 sa = meta.Session()
350
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130 all_perms = sa.query(Permission).all()
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131 except:
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132 pass
350
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133 finally:
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134 meta.Session.remove()
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135
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136 config['available_permissions'] = [x.permission_name for x in all_perms]
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137
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138 def set_base_path(config):
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139 config['base_path'] = config['pylons.app_globals'].base_path
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140
673
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141
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142 def fill_perms(user):
367
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143 """
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144 Fills user permission attribute with permissions taken from database
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145 :param user:
367
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146 """
673
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147
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148 sa = meta.Session()
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149 user.permissions['repositories'] = {}
371
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150 user.permissions['global'] = set()
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151
417
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152 #===========================================================================
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153 # fetch default permissions
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154 #===========================================================================
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155 default_user = UserModel().get_by_username('default', cache=True)
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156
423
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157 default_perms = sa.query(RepoToPerm, Repository, Permission)\
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158 .join((Repository, RepoToPerm.repository_id == Repository.repo_id))\
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159 .join((Permission, RepoToPerm.permission_id == Permission.permission_id))\
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160 .filter(RepoToPerm.user == default_user).all()
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161
316
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162 if user.is_admin:
417
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163 #=======================================================================
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164 # #admin have all default rights set to admin
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165 #=======================================================================
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166 user.permissions['global'].add('hg.admin')
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167
316
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168 for perm in default_perms:
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169 p = 'repository.admin'
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170 user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p
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171
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172 else:
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173 #=======================================================================
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174 # set default permissions
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175 #=======================================================================
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176
417
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177 #default global
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178 default_global_perms = sa.query(UserToPerm)\
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179 .filter(UserToPerm.user == sa.query(User).filter(User.username ==
423
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180 'default').one())
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181
423
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182 for perm in default_global_perms:
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183 user.permissions['global'].add(perm.permission.permission_name)
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184
417
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185 #default repositories
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186 for perm in default_perms:
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187 if perm.Repository.private and not perm.Repository.user_id == user.user_id:
316
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188 #disable defaults for private repos,
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189 p = 'repository.none'
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190 elif perm.Repository.user_id == user.user_id:
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191 #set admin if owner
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192 p = 'repository.admin'
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193 else:
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194 p = perm.Permission.permission_name
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195
399
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196 user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p
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197
417
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198 #=======================================================================
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199 # #overwrite default with user permissions if any
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200 #=======================================================================
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201 user_perms = sa.query(RepoToPerm, Permission, Repository)\
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202 .join((Repository, RepoToPerm.repository_id == Repository.repo_id))\
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203 .join((Permission, RepoToPerm.permission_id == Permission.permission_id))\
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204 .filter(RepoToPerm.user_id == user.user_id).all()
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205
316
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206 for perm in user_perms:
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207 if perm.Repository.user_id == user.user_id:#set admin if owner
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208 p = 'repository.admin'
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209 else:
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210 p = perm.Permission.permission_name
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211 user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p
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212 meta.Session.remove()
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213 return user
673
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214
299
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215 def get_user(session):
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216 """
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217 Gets user from session, and wraps permissions into user
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218 :param session:
299
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219 """
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220 user = session.get('rhodecode_user', AuthUser())
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221 #if the user is not logged in we check for anonymous access
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222 #if user is logged and it's a default user check if we still have anonymous
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223 #access enabled
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224 if user.user_id is None or user.username == 'default':
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225 anonymous_user = UserModel().get_by_username('default', cache=True)
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226 if anonymous_user.active is True:
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227 #then we set this user is logged in
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228 user.is_authenticated = True
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229 user.user_id = anonymous_user.user_id
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230 else:
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231 user.is_authenticated = False
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232
299
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233 if user.is_authenticated:
673
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234 user = UserModel().fill_data(user)
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235
412
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236 user = fill_perms(user)
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237 session['rhodecode_user'] = user
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238 session.save()
299
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239 return user
673
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240
190
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241 #===============================================================================
316
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242 # CHECK DECORATORS
190
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243 #===============================================================================
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244 class LoginRequired(object):
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245 """Must be logged in to execute this function else redirect to login page"""
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246
190
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247 def __call__(self, func):
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248 return decorator(self.__wrapper, func)
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249
377
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250 def __wrapper(self, func, *fargs, **fkwargs):
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251 user = session.get('rhodecode_user', AuthUser())
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252 log.debug('Checking login required for user:%s', user.username)
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253 if user.is_authenticated:
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254 log.debug('user %s is authenticated', user.username)
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255 return func(*fargs, **fkwargs)
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256 else:
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257 log.warn('user %s not authenticated', user.username)
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258
508
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259 p = ''
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260 if request.environ.get('SCRIPT_NAME') != '/':
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261 p += request.environ.get('SCRIPT_NAME')
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262
508
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263 p += request.environ.get('PATH_INFO')
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264 if request.environ.get('QUERY_STRING'):
474
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265 p += '?' + request.environ.get('QUERY_STRING')
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266
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267 log.debug('redirecting to login page with %s', p)
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268 return redirect(url('login_home', came_from=p))
239
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269
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270 class PermsDecorator(object):
377
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271 """Base class for decorators"""
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272
316
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273 def __init__(self, *required_perms):
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274 available_perms = config['available_permissions']
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275 for perm in required_perms:
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276 if perm not in available_perms:
316
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277 raise Exception("'%s' permission is not defined" % perm)
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278 self.required_perms = set(required_perms)
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279 self.user_perms = None
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280
316
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281 def __call__(self, func):
377
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282 return decorator(self.__wrapper, func)
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283
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284
377
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285 def __wrapper(self, func, *fargs, **fkwargs):
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286 # _wrapper.__name__ = func.__name__
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287 # _wrapper.__dict__.update(func.__dict__)
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288 # _wrapper.__doc__ = func.__doc__
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289 self.user = session.get('rhodecode_user', AuthUser())
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290 self.user_perms = self.user.permissions
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291 log.debug('checking %s permissions %s for %s %s',
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292 self.__class__.__name__, self.required_perms, func.__name__,
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293 self.user)
377
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294
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295 if self.check_permissions():
673
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296 log.debug('Permission granted for %s %s', func.__name__, self.user)
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297
377
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298 return func(*fargs, **fkwargs)
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299
377
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300 else:
673
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301 log.warning('Permission denied for %s %s', func.__name__, self.user)
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302 #redirect with forbidden ret code
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303 return abort(403)
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304
673
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305
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306
239
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307 def check_permissions(self):
377
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308 """Dummy function for overriding"""
239
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309 raise Exception('You have to write this function in child class')
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310
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311 class HasPermissionAllDecorator(PermsDecorator):
377
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312 """Checks for access permission for all given predicates. All of them
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313 have to be meet in order to fulfill the request
239
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314 """
673
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315
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316 def check_permissions(self):
339
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317 if self.required_perms.issubset(self.user_perms.get('global')):
239
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318 return True
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319 return False
673
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320
239
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321
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322 class HasPermissionAnyDecorator(PermsDecorator):
377
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323 """Checks for access permission for any of given predicates. In order to
239
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324 fulfill the request any of predicates must be meet
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325 """
673
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326
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327 def check_permissions(self):
339
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328 if self.required_perms.intersection(self.user_perms.get('global')):
316
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329 return True
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330 return False
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331
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332 class HasRepoPermissionAllDecorator(PermsDecorator):
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333 """Checks for access permission for all given predicates for specific
316
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334 repository. All of them have to be meet in order to fulfill the request
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335 """
673
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336
316
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337 def check_permissions(self):
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338 repo_name = get_repo_slug(request)
339
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339 try:
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340 user_perms = set([self.user_perms['repositories'][repo_name]])
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341 except KeyError:
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342 return False
316
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343 if self.required_perms.issubset(user_perms):
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344 return True
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345 return False
673
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346
316
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347
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348 class HasRepoPermissionAnyDecorator(PermsDecorator):
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349 """Checks for access permission for any of given predicates for specific
316
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350 repository. In order to fulfill the request any of predicates must be meet
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351 """
673
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352
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353 def check_permissions(self):
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354 repo_name = get_repo_slug(request)
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355
339
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356 try:
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357 user_perms = set([self.user_perms['repositories'][repo_name]])
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358 except KeyError:
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359 return False
316
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360 if self.required_perms.intersection(user_perms):
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361 return True
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362 return False
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363 #===============================================================================
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364 # CHECK FUNCTIONS
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365 #===============================================================================
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366
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367 class PermsFunction(object):
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368 """Base function for other check functions"""
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369
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370 def __init__(self, *perms):
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371 available_perms = config['available_permissions']
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372
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373 for perm in perms:
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374 if perm not in available_perms:
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375 raise Exception("'%s' permission in not defined" % perm)
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376 self.required_perms = set(perms)
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377 self.user_perms = None
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378 self.granted_for = ''
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379 self.repo_name = None
673
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380
316
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381 def __call__(self, check_Location=''):
548
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382 user = session.get('rhodecode_user', False)
333
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383 if not user:
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384 return False
316
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385 self.user_perms = user.permissions
673
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386 self.granted_for = user.username
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387 log.debug('checking %s %s %s', self.__class__.__name__,
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388 self.required_perms, user)
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389
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390 if self.check_permissions():
673
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391 log.debug('Permission granted for %s @ %s %s', self.granted_for,
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392 check_Location, user)
316
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393 return True
673
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394
316
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395 else:
673
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396 log.warning('Permission denied for %s @ %s %s', self.granted_for,
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397 check_Location, user)
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398 return False
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399
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400 def check_permissions(self):
377
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401 """Dummy function for overriding"""
316
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402 raise Exception('You have to write this function in child class')
673
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403
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404 class HasPermissionAll(PermsFunction):
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405 def check_permissions(self):
339
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406 if self.required_perms.issubset(self.user_perms.get('global')):
316
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407 return True
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408 return False
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409
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410 class HasPermissionAny(PermsFunction):
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411 def check_permissions(self):
339
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412 if self.required_perms.intersection(self.user_perms.get('global')):
316
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413 return True
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414 return False
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415
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416 class HasRepoPermissionAll(PermsFunction):
673
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417
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418 def __call__(self, repo_name=None, check_Location=''):
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419 self.repo_name = repo_name
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420 return super(HasRepoPermissionAll, self).__call__(check_Location)
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421
316
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422 def check_permissions(self):
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423 if not self.repo_name:
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424 self.repo_name = get_repo_slug(request)
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425
339
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426 try:
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427 self.user_perms = set([self.user_perms['repositories']\
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428 [self.repo_name]])
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429 except KeyError:
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430 return False
673
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431 self.granted_for = self.repo_name
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432 if self.required_perms.issubset(self.user_perms):
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433 return True
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434 return False
673
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435
316
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436 class HasRepoPermissionAny(PermsFunction):
673
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437
316
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438 def __call__(self, repo_name=None, check_Location=''):
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439 self.repo_name = repo_name
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440 return super(HasRepoPermissionAny, self).__call__(check_Location)
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441
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442 def check_permissions(self):
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443 if not self.repo_name:
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444 self.repo_name = get_repo_slug(request)
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445
339
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446 try:
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447 self.user_perms = set([self.user_perms['repositories']\
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448 [self.repo_name]])
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449 except KeyError:
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450 return False
316
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451 self.granted_for = self.repo_name
239
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452 if self.required_perms.intersection(self.user_perms):
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453 return True
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454 return False
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diff changeset
455
316
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456 #===============================================================================
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457 # SPECIAL VERSION TO HANDLE MIDDLEWARE AUTH
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458 #===============================================================================
239
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diff changeset
459
316
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diff changeset
460 class HasPermissionAnyMiddleware(object):
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461 def __init__(self, *perms):
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462 self.required_perms = set(perms)
673
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463
316
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464 def __call__(self, user, repo_name):
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465 usr = AuthUser()
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466 usr.user_id = user.user_id
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467 usr.username = user.username
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468 usr.is_admin = user.admin
673
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469
316
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diff changeset
470 try:
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471 self.user_perms = set([fill_perms(usr)\
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472 .permissions['repositories'][repo_name]])
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diff changeset
473 except:
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474 self.user_perms = set()
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475 self.granted_for = ''
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476 self.username = user.username
673
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477 self.repo_name = repo_name
316
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diff changeset
478 return self.check_permissions()
673
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diff changeset
479
316
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diff changeset
480 def check_permissions(self):
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481 log.debug('checking mercurial protocol '
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482 'permissions for user:%s repository:%s',
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483 self.username, self.repo_name)
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diff changeset
484 if self.required_perms.intersection(self.user_perms):
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diff changeset
485 log.debug('permission granted')
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diff changeset
486 return True
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487 log.debug('permission denied')
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diff changeset
488 return False