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";
return $output;
}
/** function that converts the decimal number to line of 3 random characters
* @param $dec decimal number that is being converted to line of 3 random characters
* */
function decToBin($dec) {
$pattern = "123456789ABCDEFGHIJKLMNOPQRTSTUWXYZ"; //without zero, it was interpreted as an empty space
$output = " ";
$i = 0;
do {
if ($dec % 2) {
$rand = rand() % 34;
$output {
2 - $i }
= $pattern {
$rand };
} else {
$output {
2 - $i }
= " ";
}
$dec = (int) ($dec / 2);
$i++;
} while ($dec > 0);
return $output;
}
/** function that renders a final 3x5 matrix consisting of random characters
* @param $a random number a that renders to the 3x5 matrix consisting of random characters
* @param $b random number b that renders to the 3x5 matrix consisting of random characters
* */
function renderExpression($a, $b) {
$output2 = "";
$number = array (
array (
7,
5,
5,
5,
7
),
array (
2,
6,
2,
2,
7
),
array (
7,
1,
7,
4,
7
),
array (
7,
1,
7,
1,
7
),
array (
4,
5,
7,
1,
1
),
array (
7,
4,
7,
1,
7
),
array (
7,
4,
7,
5,
7
),
array (
7,
1,
1,
1,
1
),
array (
7,
5,
7,
5,
7
),
array (
7,
5,
7,
1,
7
)
);
$plus = array (
0,
2,
7,
2,
0
);
$eq = array (
0,
7,
0,
7,
0
);
for ($line = 0; $line < 5; $line++) {
$output2 .= MathGuard2 :: decToBin($number[$a][$line]) . " " . MathGuard2 :: decToBin($plus[$line]) . " " . MathGuard2 :: decToBin($number[$b][$line]) . " " . MathGuard2 :: decToBin($eq[$line]) . "\n";
$output2 = str_replace("0", " ", $output2);
}
return $output2;
}
/** A main hashing function: concat of user's answer, hour and the additional prime number (default 37) */
function encode($input, $prime) {
return md5($input . date("H") . $prime);
}
/** This function generates the hash code from the two numbers
* @param $a first number
* @param $b second sumber
* @param $prime additional number to encode with
* */
function generateCode($a, $b, $prime) {
$code = MathGuard2 :: encode($a + $b, $prime);
return $code;
}
/** This function checks whether the answer and generated security code match
* @param $mathguard_answer answer the user has entered
* @param $mathguard_code hashcode the mathguard has generated
*/
function checkResult($mathguard_answer, $mathguard_code, $prime = 37) {
// echo("prime; $prime, $mathguard_answer");
$result_encoded = MathGuard2 :: encode($mathguard_answer, $prime);
if ($result_encoded == $mathguard_code)
return true;
else
return false;
}
/** this function inserts the two math term into your form, the parameter is optional */
function insertQuestion($prime = 37) { //default prime is 37, you can change it when specifying the different parameter
$output = MathGuard2 :: produceOutput($prime);
echo $output;
}
/** this function inserts the two math term into your form, the parameter is optional */
function insertQuestion2($prime = 37) { //default prime is 37, you can change it when specifying the different parameter
$output = MathGuard2 :: produceOutput($prime);
return $output;
}
/** this function returns math expression into your form, the parameter is optional
* quite simmilar to insertQuestion, but returns the output as a text instead of echoing
*/
function returnQuestion($prime = 37) { //default prime is 37, you can change it when specifying the different parameter
$output = MathGuard2 :: produceOutput($prime);
return $output;
}
}
?>
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Written by Administrator
|
|
Monday, 06 March 2006 |
We comprehend the numerous ways in which companies use technology to better enable their business processes and use this knowledge to make strategic improvements. Furthermore, we possess the critically important ability to communicate those ideas at every level of your organization.
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Last Updated ( Monday, 06 March 2006 )
|
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|
Written by Administrator
|
|
Monday, 06 March 2006 |
|
MoCo Data Service is a firm of specialists. We bring the best and the brightest, and those who have specific experience in solving your problems. Our consultants share a common vision, passion, and enthusiasm to provide our clients with leading-edge solutions required in today's changing business environment.
Go to My demo-mocodata Place
|
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Last Updated ( Thursday, 13 December 2007 )
|
|
|
Written by Administrator
|
|
Monday, 06 March 2006 |
|
MoCo Data Services provides the IT and network solutions needed to prevail in today's new markets. From systems integration and managed network solutions to knowledge management, engineering, simulation and information assurance, we deliver the IT applications and infrastructures our customers use to improve communications and collaboration, secure the integrity of information systems and networks, enhance data collection and analysis and increase efficiency and mission effectiveness. |
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