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<body BGCOLOR="#00E0E0" link="#001fC0" vlink="#000080" text="#00000f">
<h1> Encode integer 'm' </h1>
<?
echo "<h1> Decodes the ciphered integer using the secret 'd' key : m = c^d mod n. </h1>\n";
//echo "d == $d <p>";
//echo "c == $c <p>";
//echo "digits = $digits<p>";
//echo "\n\n\n\n\n";
//$gt100k = `./gt100k $digits`;
//if ($gt100k != 1)
//echo "<h3>c^d == </h3>";
// check here that the exponentiation can actually be displayed
// and use the recursive algorithms if it cannot
// along with a warning about the length of time it could take.
$digits = `./pow_digits $c $d `;
$gt100_k = `./gt100k $digits`;
//echo "./gt100k $digits";
//echo " gt100_k == $gt100_k";
$date = `date`;
printf("<p> Start Time == %s </p>\n",$date);
if ($gt100_k != 1) {
echo " <h3> The predicted number of digits from the exponentiation is less than 100,000. </h3></h3>It can therefore be shown in full </h3><p>";
$c_to_d = `echo " $c ^ $d " | bc | sed -f ./nlhtml.sed `;
echo $c_to_d;
`echo " $c ^ $d " | bc | sed -f ./nlhtml.sed `;
echo " % $n <p>";
echo "<h3> this gives the 'in clear' result </h3>";
$clear = `echo " ( $c ^ $d ) % $n " | bc | sed -f ./nlhtml.sed `;
echo $clear;
}
else {
echo "<h3> The number of digits produced by the exponentiation of c^d is greater than 100,0000 </h3>";
echo "<h3> The resursive (see <a href=\"maths.html\"> recursive exponentiation break down </a>) routines will be applied instead to calculate c^d%n </h3>";
$clear = `./cbe.sh 'A $c B $d C $n D'`; // php is very nasty about sending multiple args to scripts
echo "<h3> this gives the 'in clear' result </h3>";
echo $clear;
}
$date = `date`;
printf("<p> End Time == %s</p> \n",$date);
printf("<form enctype=\"multipart/form-data\" method=\"post\"
action=\"encode_pub.php#KEYS\">");
?>
<input type="hidden" name=d value=<? echo $d ?>>
<input type="hidden" name=q value=<? echo $q ?>>
<input type="hidden" name=p value=<? echo $p ?>>
<input type="hidden" name=phi value=<? echo $phi ?>>
<input type="hidden" name=e value=<? echo $e ?>>
<input type="hidden" name=n value=<? echo $n ?>>
<input type="hidden" name=c value=<? echo $c ?>>
<input type="hidden" name=m value=<? echo $m ?>>
<input type="hidden" name=digits value=<? echo $digits ?>>
<table>
<tr>
<td>
<input type="submit" name="submit" value="Next">
</td>
</tr>
</table>
</body>
</html>