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1 package IMPL::Web::Handler::SecureCookie;
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196
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2 use strict;
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3
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4
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5 use Digest::MD5 qw(md5_hex);
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6 use IMPL::Const qw(:prop);
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7 use IMPL::Security::Auth qw(:Const GenSSID);
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8 use IMPL::declare {
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9 require => {
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10 SecurityContext => 'IMPL::Security::Context',
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11 User => 'IMPL::Security::Principal',
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12 AuthSimple => 'IMPL::Security::Auth::Simple',
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13 Exception => 'IMPL::Exception',
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14 OperationException => '-IMPL::InvalidOperationException',
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15 HttpResponse => '-IMPL::Web::HttpResponse'
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16 },
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17 base => {
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18 'IMPL::Object' => undef,
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19 'IMPL::Object::Autofill' => '@_',
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20 'IMPL::Object::Serializable' => undef
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21 },
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22 props => [
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23 salt => PROP_RO,
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24 _manager => PROP_RO,
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25 _cookies => PROP_RW
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26 ]
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27 };
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28
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29 sub CTOR {
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30 my ($this) = @_;
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31
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32 $this->salt('DeadBeef') unless $this->salt;
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33 }
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34
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35 sub ValidateCookie {
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36 my ($this,$sid,$cookie,$sign) = @_;
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37
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38 return 1 if $sid and $cookie and $sign and $sign eq md5_hex($this->salt,$sid,$cookie,$this->salt);
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39
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40 return 0;
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41 }
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42
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43 sub Invoke {
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44 my ($this,$action,$nextHandler) = @_;
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45
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46 return unless $nextHandler;
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47
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48 my $context;
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49 $this->_manager($action->application->security);
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50
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51
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52 my $sid = $action->cookie('sid',qr/(\w+)/);
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53 my $cookie = $action->cookie('sdata',qr/(\w+)/);
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54 my $sign = $action->cookie('sign',qw/(\w+)/);
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55
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56 if ( $this->ValidateCookie($sid,$cookie,$sign) ) {
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57 # TODO: add a DefferedProxy to deffer a request to a data source
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58 if ( $context = $this->_manager->GetSession($sid) ) {
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59 if ( eval { $context->auth->isa(AuthSimple) } ) {
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60 my ($result,$challenge) = $context->auth->DoAuth($cookie);
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61
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62 $context->authority($this);
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63
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64 if ($result == AUTH_FAIL) {
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65 $context = undef;
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66 }
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67 } else {
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68 undef $context;
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69 }
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70 }
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71
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72 }
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73
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74 $context ||= SecurityContext->new(principal => User->nobody, authority => $this);
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75
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76 my $httpResponse = $context->Impersonate($nextHandler,$action);
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77
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78 die OperationException->new("A HttpResponse instance is expected")
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79 unless ref $httpResponse && eval { $httpResponse->isa(HttpResponse) };
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80
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81 return $this->WriteResponse($httpResponse);
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82 }
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83
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84 sub InitSession {
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85 my ($this,$user,$roles,$auth,$challenge) = @_;
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86
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87 my ($status,$answer);
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88
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89 if ($auth) {
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90 ($status,$answer) = $auth->DoAuth($challenge);
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91 } else {
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92 $status = AUTH_SUCCESS;
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93 }
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94
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95 die OperationException->new("This provider doesn't support multiround auth")
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96 if ($status == AUTH_INCOMPLETE || $answer);
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97
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98 if ($status == AUTH_SUCCESS) {
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99 my $sid = GenSSID();
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100 my $cookie = GenSSID();
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101
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102 $this->_cookies({
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103 sid => $sid,
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104 sdata => $cookie
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105 });
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106
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107 my $context = $this->_manager->CreateSession(
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108 sessionId => $sid,
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109 principal => $user,
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110 auth => AuthSimple->Create(password => $cookie),
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111 authority => $this,
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112 rolesAssigned => $roles
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113 );
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114
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115 $context->Apply();
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116
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117 }
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118
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119 return $status;
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120 }
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121
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122 sub CloseSession {
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123 my ($this) = @_;
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124 if(my $session = SecurityContext->current) {
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125 $this->_cookies({
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126 sid => undef,
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127 sdata => undef
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128 })
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129 }
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130 }
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131
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132 sub WriteResponse {
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133 my ($this,$response) = @_;
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134
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135 if (my $data = $this->_cookies) {
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136
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137 my $sign = $data->{sid} && md5_hex(
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138 $this->salt,
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139 $data->{sid},
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140 $data->{sdata},
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141 $this->salt
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142 );
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143
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144 $response->cookies->{sid} = $data->{sid};
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145 $response->cookies->{sdata} = $data->{sdata};
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146 $response->cookies->{sign} = $sign;
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147 }
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148
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149 return $response;
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150 }
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151
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152 1;
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153
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154 __END__
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155
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156 =pod
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157
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158 =head1 NAME
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159
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230
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160 C<IMPL::Web::Handler::SecureCookie>
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161
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162 =head1 DESCRIPTION
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163
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164 Возобновляет сессию пользователя на основе информации переданной через Cookie.
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165
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166 Использует механизм подписи информации для проверки верности входных данных перед
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167 началом каких-либо действий.
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168
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169 Данный обработчик возвращает результат выполнения следдующего обработчика.
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170
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171
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172
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173 =head1 MEMBERS
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174
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175 =head2 C<[get,set] salt>
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176
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177 Скаляр, использующийся для подписи данных.
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178
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179
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180 =head2 C<InitSession($user,$roles,$auth,$challenge)>
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181
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182 Инициирует сессию, поскольку данный модуль отвечает за взаимодействие с клиентом
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183 при проверки аутентификации, ему передаются данные аутентификации для
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184 продолжения обмена данными с клиентом. Если создается новая сессия, по
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185 инициативе веб-приложения, то C<$auth> должно быть пусто.
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186
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187 =cut
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