1<?php
2//	 Session Encryption by Ari Kuorikoski <ari.kuorikoski@finebyte.com>
3class MD5Crypt{
4		function keyED($txt,$encrypt_key)
5		{
6				$encrypt_key = md5($encrypt_key);
7				$ctr=0;
8				$tmp = "";
9				for ($i=0;$i<strlen($txt);$i++){
10						if ($ctr==strlen($encrypt_key)) $ctr=0;
11						$tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);
12						$ctr++;
13				}
14				return $tmp;
15		}
16
17		function Encrypt($txt,$key)
18		{
19				srand((double)microtime()*1000000);
20				$encrypt_key = md5(rand(0,32000));
21				$ctr=0;
22				$tmp = "";
23				for ($i=0;$i<strlen($txt);$i++)
24				{
25				if ($ctr==strlen($encrypt_key)) $ctr=0;
26				$tmp.= substr($encrypt_key,$ctr,1) .
27				(substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
28				$ctr++;
29				}
30				return base64_encode($this->keyED($tmp,$key));
31		}
32
33		function Decrypt($txt,$key)
34		{
35				$txt = $this->keyED(base64_decode($txt),$key);
36				$tmp = "";
37				for ($i=0;$i<strlen($txt);$i++){
38						$md5 = substr($txt,$i,1);
39						$i++;
40						$tmp.= (substr($txt,$i,1) ^ $md5);
41				}
42				return $tmp;
43		}
44
45		function RandPass()
46		{
47				$randomPassword = "";
48				srand((double)microtime()*1000000);
49				for($i=0;$i<8;$i++)
50				{
51						$randnumber = rand(48,120);
52
53						while (($randnumber >= 58 && $randnumber <= 64) || ($randnumber >= 91 && $randnumber <= 96))
54						{
55								$randnumber = rand(48,120);
56						}
57
58						$randomPassword .= chr($randnumber);
59				}
60				return $randomPassword;
61		}
62
63}
64
65
66class SHA1Crypt{
67
68		function keyED($txt,$encrypt_key)
69		{
70
71				$encrypt_key = sha1($encrypt_key);
72				$ctr=0;
73				$tmp = "";
74
75				for ($i=0;$i<strlen($txt);$i++){
76						if ($ctr==strlen($encrypt_key)) $ctr=0;
77						$tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);
78						$ctr++;
79				}
80				return $tmp;
81
82		}
83
84
85
86		function Encrypt($txt,$key)
87		{
88
89				srand((double)microtime()*1000000);
90				$encrypt_key = sha1(rand(0,32000));
91				$ctr=0;
92				$tmp = "";
93
94				for ($i=0;$i<strlen($txt);$i++)
95
96				{
97
98				if ($ctr==strlen($encrypt_key)) $ctr=0;
99
100				$tmp.= substr($encrypt_key,$ctr,1) .
101
102				(substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
103
104				$ctr++;
105
106				}
107
108				return base64_encode($this->keyED($tmp,$key));
109
110		}
111
112
113
114		function Decrypt($txt,$key)
115		{
116
117				$txt = $this->keyED(base64_decode($txt),$key);
118
119				$tmp = "";
120
121				for ($i=0;$i<strlen($txt);$i++){
122
123						$sha1 = substr($txt,$i,1);
124
125						$i++;
126
127						$tmp.= (substr($txt,$i,1) ^ $sha1);
128
129				}
130
131				return $tmp;
132		}
133
134
135
136		function RandPass()
137		{
138				$randomPassword = "";
139				srand((double)microtime()*1000000);
140
141				for($i=0;$i<8;$i++)
142				{
143
144						$randnumber = rand(48,120);
145
146						while (($randnumber >= 58 && $randnumber <= 64) || ($randnumber >= 91 && $randnumber <= 96))
147						{
148								$randnumber = rand(48,120);
149						}
150
151						$randomPassword .= chr($randnumber);
152				}
153
154				return $randomPassword;
155
156		}
157
158
159
160}
161?>