<html>
<body BGCOLOR="#00E0E0" link="#001fC0" vlink="#000080" text="#00000f">
<h1> Encode integer 'm' </h1>
<?
echo "<h1> Computes the cipher text c = m^e mod n.</h1>";
echo "<h3> $m^$e%$n </h3>";
$digits = `./pow_digits $m $e`;
$gt100_k = `./gt100k $digits`;
echo "digits",$digits;
echo "<h3>m^e for this equation will produce a number with approx $digits digits</h3>";
if ( $gt100_k != 1 ) {
$m_to_e = `echo " $m ^ $e " | bc | sed -f ./nlhtml.sed `;
echo $m_to_e;
echo " % $n <p>";
echo "<h3> this gives the'public key encoded' cipher result </h3>";
echo "</p>";
$c = `echo " ( $m ^ $e ) % $n " | bc`;
echo $c;
}
else {
echo "<h3> The number of digits produced by the exponentiation of m^e is greater than 100,0000 </h3>";
echo "<h3> The resursive (see <a href=\"maths.html\"> recursive exponentiation break down </a>) ";
echo "routines will be applied instead of direct implementation to calculate m^e%n </h3>";
$c = `./cbe.sh 'A $m B $e C $n D'`; // php is very nasty about sending multiple args to scripts
echo "<h3> this gives the 'public key encoded' cipher result </h3>";
echo $c;
}
printf("<form enctype=\"multipart/form-data\" method=\"post\"
action=\"encode_pub.php#DECODE\">");
?>
<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 ?>>
<table>
<tr>
<td>
<input type="submit" name="submit" value="Next">
</td>
</tr>
</table>
</body>
</html>