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Revision 35 - (show annotations) (download)
Sat Oct 8 23:35:33 2016 UTC (6 years, 3 months ago) by dashley
File size: 3934 byte(s)
Initial commit.
1 <?php
2 //********************************************************************************
3 //Copyright (C)2006 David T. Ashley
4 //********************************************************************************
5 //This program or source file is free software; you can redistribute it and/or
6 //modify it under the terms of the GNU General Public License as published by
7 //the Free Software Foundation; either version 2 of the License, or (at your
8 //option) any later version.
9 //
10 //This program or source file is distributed in the hope that it will
11 //be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
12 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 //GNU General Public License for more details.
14 //
15 //You may have received a copy of the GNU General Public License
16 //along with this program; if not, write to the Free Software
17 //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 //********************************************************************************
19 //Dave Ashley, 01/06
20 //
21 //This source file contains cryptographic hash functions.
22 //
23 //This constant is the hashing key. This must be concealed from all users of the system.
24 //Knowledge of this key would allow a user to forge hashes. The key consists of random
25 //typing, digits of PI, verbiage from the PHP website, and Thoreau quotes.
26 //
27 define("CRHSH_KEY_A", "kdj376xhadfhl134g;;hv adfhlLLL:::341324hdbvjkahsdfgh2834gigwreeiqrbuibwqvgzzxxaqkhlkagdviab;;" .
28 "wikiwikiboomboomWhen you remove constant in your pool.14159265358979323846264338hgiik123435 /" .
29 "628034825342117067982160631558817488152092096282925409171536436789259next greatest happiness " .
30 "always 762876110927543725 clear understanding that I do not attain //76234767960bbbhgquickbro" .
31 "hgalshdfthequickdoglazytheoverjumpedfoxquickbrownfox---mind was all undusted still,.........." );
32
33 //All of the functions below calculate an MD5 hash with various numbers of arguments. A
34 //function accepting a variable number of arguments is also provided. The return value
35 //in all cases is an MD5 hash of the arguments intermingled with the key.
36 //
37 //The functions are in all cases deterministic (same inputs will always produce same output).
38 //
39 //Once a database system is in operation, the key must not be changed, or it may render the database
40 //system unusable.
41 //
42 function CRHSH_hash01($arg)
43 {
44 $arg = (string) $arg;
45
46 $input = CRHSH_KEY_A . $arg . CRHSH_KEY_A;
47
48 //echo "<br>\n";
49 //echo $input;
50 //echo "<br>\n";
51
52 $rv = md5($input);
53
54 return($rv);
55 }
56 //
57 function CRHSH_hash02($arg01, $arg02)
58 {
59 $arg01 = (string) $arg01;
60 $arg02 = (string) $arg02;
61
62 $input = CRHSH_KEY_A . $arg01 . CRHSH_KEY_A . $arg02 . CRHSH_KEY_A;
63
64 //echo "<br>\n";
65 //echo $input;
66 //echo "<br>\n";
67
68 $rv = md5($input);
69
70 return($rv);
71 }
72 //
73 function CRHSH_hash03($arg01, $arg02, $arg03)
74 {
75 $arg01 = (string) $arg01;
76 $arg02 = (string) $arg02;
77 $arg03 = (string) $arg03;
78
79 $input = CRHSH_KEY_A . $arg01 . CRHSH_KEY_A . $arg02 . CRHSH_KEY_A . $arg03 . CRHSH_KEY_A;
80
81 $rv = md5($input);
82
83 return($rv);
84 }
85 //
86 function CRHSH_hash04($arg01, $arg02, $arg03, $arg04)
87 {
88 $arg01 = (string) $arg01;
89 $arg02 = (string) $arg02;
90 $arg03 = (string) $arg03;
91 $arg04 = (string) $arg04;
92
93 $input = CRHSH_KEY_A . $arg01 . CRHSH_KEY_A . $arg02 . CRHSH_KEY_A . $arg03 . CRHSH_KEY_A . $arg04 . CRHSH_KEY_A;
94
95 $rv = md5($input);
96
97 return($rv);
98 }
99 //
100 function CRHSH_hashva()
101 {
102 $input = CRHSH_KEY_A;
103
104 $num_args = func_num_args();
105
106 for ($i=0; $i<$num_args; $i++)
107 {
108 $input .= ((string) func_get_arg($i));
109 $input .= CRHSH_KEY_A;
110 }
111
112 $rv = md5($input);
113
114 return($rv);
115 }
116 ?>

dashley@gmail.com
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