1<?php
2
3/**
4 * OpenID protocol key-value/comma-newline format parsing and
5 * serialization
6 *
7 * PHP versions 4 and 5
8 *
9 * LICENSE: See the COPYING file included in this distribution.
10 *
11 * @access private
12 * @package OpenID
13 * @author JanRain, Inc. <openid@janrain.com>
14 * @copyright 2005-2008 Janrain, Inc.
15 * @license http://www.apache.org/licenses/LICENSE-2.0 Apache
16 */
17
18/**
19 * Container for key-value/comma-newline OpenID format and parsing
20 */
21class Auth_OpenID_KVForm {
22    /**
23     * Convert an OpenID colon/newline separated string into an
24     * associative array
25     *
26     * @static
27     * @access private
28     */
29    static function toArray($kvs, $strict=false)
30    {
31        $lines = explode("\n", $kvs);
32
33        $last = array_pop($lines);
34        if ($last !== '') {
35            array_push($lines, $last);
36            if ($strict) {
37                return false;
38            }
39        }
40
41        $values = array();
42
43        for ($lineno = 0; $lineno < count($lines); $lineno++) {
44            $line = $lines[$lineno];
45            $kv = explode(':', $line, 2);
46            if (count($kv) != 2) {
47                if ($strict) {
48                    return false;
49                }
50                continue;
51            }
52
53            $key = $kv[0];
54            $tkey = trim($key);
55            if ($tkey != $key) {
56                if ($strict) {
57                    return false;
58                }
59            }
60
61            $value = $kv[1];
62            $tval = trim($value);
63            if ($tval != $value) {
64                if ($strict) {
65                    return false;
66                }
67            }
68
69            $values[$tkey] = $tval;
70        }
71
72        return $values;
73    }
74
75    /**
76     * Convert an array into an OpenID colon/newline separated string
77     *
78     * @static
79     * @access private
80     */
81    static function fromArray($values)
82    {
83        if ($values === null) {
84            return null;
85        }
86
87        ksort($values);
88
89        $serialized = '';
90        foreach ($values as $key => $value) {
91            if (is_array($value)) {
92                list($key, $value) = array($value[0], $value[1]);
93            }
94
95            if (strpos($key, ':') !== false) {
96                return null;
97            }
98
99            if (strpos($key, "\n") !== false) {
100                return null;
101            }
102
103            if (strpos($value, "\n") !== false) {
104                return null;
105            }
106            $serialized .= "$key:$value\n";
107        }
108        return $serialized;
109    }
110}
111
112