DooDigestAuth php（后台）授权管理类 web浏览器授权

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发布时间：2016-07-29 09:15:38

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<span>  1</span> <?<span>php
</span><span>  2</span><span>/*</span><span>*
</span><span>  3</span><span> * DooDigestAuth class file.
</span><span>  4</span><span> *
</span><span>  5</span><span> * @author Leng Sheng Hong <darkredz@gmail.com>
</span><span>  6</span><span> * @link http://www.doophp.com/
</span><span>  7</span><span> * @copyright Copyright &copy; 2009 Leng Sheng Hong
</span><span>  8</span><span> * @license http://www.doophp.com/license
</span><span>  9</span><span>*/</span><span> 10</span><span> 11</span><span>/*</span><span>*
</span><span> 12</span><span> * Handles HTTP digest authentication
</span><span> 13</span><span> *
</span><span> 14</span><span> * <p>HTTP digest authentication can be used with the URI router.
</span><span> 15</span><span> * HTTP digest is much more recommended over the use of HTTP Basic auth which doesn't provide any encryption.
</span><span> 16</span><span> * If you are running PHP on Apache in CGI/FastCGI mode, you would need to
</span><span> 17</span><span> * add the following line to your .htaccess for digest auth to work correctly.</p>
</span><span> 18</span><span> * <code>RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]</code>
</span><span> 19</span><span> *
</span><span> 20</span><span> * <p>This class is tested under Apache 2.2 and Cherokee web server. It should work in both mod_php and cgi mode.</p>
</span><span> 21</span><span> *
</span><span> 22</span><span> * @author Leng Sheng Hong <darkredz@gmail.com>
</span><span> 23</span><span> * @version $Id: DooDigestAuth.php 1000 2009-07-7 18:27:22
</span><span> 24</span><span> * @package doo.auth
</span><span> 25</span><span> * @since 1.0
</span><span> 26</span><span>*/</span><span> 27</span><span>class</span><span> DooDigestAuth{
</span><span> 28</span><span> 29</span><span>/*</span><span>*
</span><span> 30</span><span>     * Authenticate against a list of username and passwords.
</span><span> 31</span><span>     *
</span><span> 32</span><span>     * <p>HTTP Digest Authentication doesn't work with PHP in CGI mode,
</span><span> 33</span><span>     * you have to add this into your .htaccess <code>RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]</code></p>
</span><span> 34</span><span>     *
</span><span> 35</span><span>     * @param string $realm Name of the authentication session
</span><span> 36</span><span>     * @param array $users An assoc array of username and password: array('uname1'=>'pwd1', 'uname2'=>'pwd2')
</span><span> 37</span><span>     * @param string $fail_msg Message to be displayed if the User cancel the login
</span><span> 38</span><span>     * @param string $fail_url URL to be redirect if the User cancel the login
</span><span> 39</span><span>     * @return string The username if login success.
</span><span> 40</span><span>*/</span><span> 41</span><span>public</span><span>static</span><span>function</span> http_auth(<span>$realm</span>, <span>$users</span>, <span>$fail_msg</span>=<span>NULL</span>, <span>$fail_url</span>=<span>NULL</span><span>){
</span><span> 42</span><span>$realm</span> = "Restricted area - <span>$realm</span>"<span>;
</span><span> 43</span><span> 44</span><span>//</span><span>user => password
</span><span> 45</span><span>        //$users = array('admin' => '1234', 'guest' => 'guest');</span><span> 46</span><span>if</span>(!<span>empty</span>(<span>$_SERVER</span>['REDIRECT_HTTP_AUTHORIZATION']) && <span>strpos</span>(<span>$_SERVER</span>['REDIRECT_HTTP_AUTHORIZATION'], 'Digest')===0<span>){
</span><span> 47</span><span>$_SERVER</span>['PHP_AUTH_DIGEST'] = <span>$_SERVER</span>['REDIRECT_HTTP_AUTHORIZATION'<span>];
</span><span> 48</span><span>        }
</span><span> 49</span><span> 50</span><span>if</span> (<span>empty</span>(<span>$_SERVER</span>['PHP_AUTH_DIGEST'<span>])) {
</span><span> 51</span><span>header</span>('WWW-Authenticate: Digest realm="'.<span>$realm</span>.
<span> 52</span>                    '",qop="auth",n>uniqid().'",opaque="'.<span>md5</span>(<span>$realm</span>).'"'<span>);
</span><span> 53</span><span>header</span>('HTTP/1.1 401 Unauthorized'<span>);
</span><span> 54</span><span>if</span>(<span>$fail_msg</span>!=<span>NULL</span><span>)
</span><span> 55</span><span>die</span>(<span>$fail_msg</span><span>);
</span><span> 56</span><span>if</span>(<span>$fail_url</span>!=<span>NULL</span><span>)
</span><span> 57</span><span>die</span>("<script>window.location.href = '<span>$fail_url</span>'</script>"<span>);
</span><span> 58</span><span>exit</span><span>;
</span><span> 59</span><span>        }
</span><span> 60</span><span> 61</span><span>//</span><span> analyze the PHP_AUTH_DIGEST variable</span><span> 62</span><span>if</span> (!(<span>$data</span> = self::http_digest_parse(<span>$_SERVER</span>['PHP_AUTH_DIGEST'])) || !<span>isset</span>(<span>$users</span>[<span>$data</span>['username'<span>]])){
</span><span> 63</span><span>header</span>('WWW-Authenticate: Digest realm="'.<span>$realm</span>.
<span> 64</span>                    '",qop="auth",n>uniqid().'",opaque="'.<span>md5</span>(<span>$realm</span>).'"'<span>);
</span><span> 65</span><span>header</span>('HTTP/1.1 401 Unauthorized'<span>);
</span><span> 66</span><span>if</span>(<span>$fail_msg</span>!=<span>NULL</span><span>)
</span><span> 67</span><span>die</span>(<span>$fail_msg</span><span>);
</span><span> 68</span><span>if</span>(<span>$fail_url</span>!=<span>NULL</span><span>)
</span><span> 69</span><span>die</span>("<script>window.location.href = '<span>$fail_url</span>'</script>"<span>);
</span><span> 70</span><span>exit</span><span>;
</span><span> 71</span><span>        }
</span><span> 72</span><span> 73</span><span>//</span><span> generate the valid response</span><span> 74</span><span>$A1</span> = <span>md5</span>(<span>$data</span>['username'] . ':' . <span>$realm</span> . ':' . <span>$users</span>[<span>$data</span>['username'<span>]]);
</span><span> 75</span><span>$A2</span> = <span>md5</span>(<span>$_SERVER</span>['REQUEST_METHOD'].':'.<span>$data</span>['uri'<span>]);
</span><span> 76</span><span>$valid_response</span> = <span>md5</span>(<span>$A1</span>.':'.<span>$data</span>['nonce'].':'.<span>$data</span>['nc'].':'.<span>$data</span>['cnonce'].':'.<span>$data</span>['qop'].':'.<span>$A2</span><span>);
</span><span> 77</span><span> 78</span><span>if</span> (<span>$data</span>['response'] != <span>$valid_response</span><span>){
</span><span> 79</span><span>header</span>('HTTP/1.1 401 Unauthorized'<span>);
</span><span> 80</span><span>header</span>('WWW-Authenticate: Digest realm="'.<span>$realm</span>.
<span> 81</span>                    '",qop="auth",n>uniqid().'",opaque="'.<span>md5</span>(<span>$realm</span>).'"'<span>);
</span><span> 82</span><span>if</span>(<span>$fail_msg</span>!=<span>NULL</span><span>)
</span><span> 83</span><span>die</span>(<span>$fail_msg</span><span>);
</span><span> 84</span><span>if</span>(<span>$fail_url</span>!=<span>NULL</span><span>)
</span><span> 85</span><span>die</span>("<script>window.location.href = '<span>$fail_url</span>'</script>"<span>);
</span><span> 86</span><span>exit</span><span>;
</span><span> 87</span><span>        }
</span><span> 88</span><span> 89</span><span>//</span><span> ok, valid username & password</span><span> 90</span><span>return</span><span>$data</span>['username'<span>];
</span><span> 91</span><span>    }
</span><span> 92</span><span> 93</span><span>/*</span><span>*
</span><span> 94</span><span>     * Method to parse the http auth header, works with IE.
</span><span> 95</span><span>     *
</span><span> 96</span><span>     * Internet Explorer returns a qop="xxxxxxxxxxx" in the header instead of qop=xxxxxxxxxxx as most browsers do.
</span><span> 97</span><span>     *
</span><span> 98</span><span>     * @param string $txt header string to parse
</span><span> 99</span><span>     * @return array An assoc array of the digest auth session
</span><span>100</span><span>*/</span><span>101</span><span>private</span><span>static</span><span>function</span> http_digest_parse(<span>$txt</span><span>)
</span><span>102</span><span>    {
</span><span>103</span><span>$res</span> = <span>preg_match</span>("/username=\"([^\"]+)\"/i", <span>$txt</span>, <span>$match</span><span>);
</span><span>104</span><span>$data</span>['username'] = (<span>isset</span>(<span>$match</span>[1]))?<span>$match</span>[1]:<span>null</span><span>;
</span><span>105</span><span>$res</span> = <span>preg_match</span>('/n/i', <span>$txt</span>, <span>$match</span><span>);
</span><span>106</span><span>$data</span>['nonce'] = <span>$match</span>[1<span>];
</span><span>107</span><span>$res</span> = <span>preg_match</span>('/nc=([0-9]+)/i', <span>$txt</span>, <span>$match</span><span>);
</span><span>108</span><span>$data</span>['nc'] = <span>$match</span>[1<span>];
</span><span>109</span><span>$res</span> = <span>preg_match</span>('/cn/i', <span>$txt</span>, <span>$match</span><span>);
</span><span>110</span><span>$data</span>['cnonce'] = <span>$match</span>[1<span>];
</span><span>111</span><span>$res</span> = <span>preg_match</span>('/qop=([^,]+)/i', <span>$txt</span>, <span>$match</span><span>);
</span><span>112</span><span>$data</span>['qop'] = <span>str_replace</span>('"','',<span>$match</span>[1<span>]);
</span><span>113</span><span>$res</span> = <span>preg_match</span>('/uri=\"([^\"]+)\"/i', <span>$txt</span>, <span>$match</span><span>);
</span><span>114</span><span>$data</span>['uri'] = <span>$match</span>[1<span>];
</span><span>115</span><span>$res</span> = <span>preg_match</span>('/resp/i', <span>$txt</span>, <span>$match</span><span>);
</span><span>116</span><span>$data</span>['response'] = <span>$match</span>[1<span>];
</span><span>117</span><span>return</span><span>$data</span><span>;
</span><span>118</span><span>    }
</span><span>119</span><span>120</span><span>121</span> }

调用方法:

<span>1</span><span>require_once</span>(<span>dirname</span>(<span>__FILE__</span>)."/DooDigestAuth.php"<span>);
</span><span>2</span> DooDigestAuth::http_auth('example.com', <span>array</span>('admin'=>"123456789"));

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