Robin P. Clark
a4b3002f75
made it create a bc script for larger keys (rather thn make the web page wait for the long calculations).
85 lines
2.7 KiB
PHP
85 lines
2.7 KiB
PHP
<html>
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<body BGCOLOR="#00E0E0" link="#001fC0" vlink="#000080" text="#00000f">
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<h1> Encode integer 'm' </h1>
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<?php
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$c = $_POST['c'];
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$m = $_POST['m'];
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$e = $_POST['e'];
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$e = $_POST['e'];
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$d = $_POST['d'];
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$p = $_POST['p'];
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$n = $_POST['n'];
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$q = $_POST['q'];
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$phi = $_POST['phi'];
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$mprivate = $_POST['mprivate'];
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echo "<h1> Decodes the ciphered integer using the secret 'd' key : m = c^d mod n. </h1>\n";
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//echo "d == $d <p>";
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//echo "c == $c <p>";
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//echo "digits = $digits<p>";
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//echo "\n\n\n\n\n";
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//$gt100k = `./gt100k $digits`;
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//if ($gt100k != 1)
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//echo "<h3>c^d == </h3>";
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// check here that the exponentiation can actually be displayed
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// and use the recursive algorithms if it cannot
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// along with a warning about the length of time it could take.
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$digits = `./pow_digits $c $d `;
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$gt100_k = `./gt100k $digits`;
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//echo "./gt100k $digits";
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//echo " gt100_k == $gt100_k";
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$date = `date`;
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printf("<p> Start Time == %s </p>\n",$date);
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if ($gt100_k != 1) {
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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>";
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$c_to_d = `echo " $c ^ $d " | bc | sed -f ./nlhtml.sed `;
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echo $c_to_d;
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`echo " $c ^ $d " | bc | sed -f ./nlhtml.sed `;
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echo " % $n <p>";
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echo "<h3> this gives the 'in clear' result </h3>";
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$clear = `echo " ( $c ^ $d ) % $n " | bc | sed -f ./nlhtml.sed `;
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echo $clear;
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}
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else {
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echo "<h3> The number of digits produced by the exponentiation of c^d is greater than 100,000 </h3>";
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echo "<h3> The resursive (see <a href=\"maths.html\"> recursive exponentiation break down </a>) routines will be applied instead to calculate c^d%n </h3>";
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$clear = `./cbe.sh 'A $c B $d C $n D'`; // php is very nasty about sending multiple args to scripts
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echo $clear;
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echo "<h3> The resursive routines can take some time to run, too long to leave a web page waitng! </h3>";
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echo "<h3> If you don't have `bc' on your system, grow up and get a proper operating system. </h3>";
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}
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$me = `whoami`;
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$date = `date`;
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printf("<p> End Time == %s me=%s</p> \n",$date,$me);
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printf("<form enctype=\"multipart/form-data\" method=\"post\"
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action=\"encode_pub.php#KEYS\">");
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?>
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<input type="hidden" name=d value=<?php echo $d ?>>
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<input type="hidden" name=q value=<?php echo $q ?>>
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<input type="hidden" name=p value=<?php echo $p ?>>
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<input type="hidden" name=phi value=<?php echo $phi ?>>
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<input type="hidden" name=e value=<?php echo $e ?>>
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<input type="hidden" name=n value=<?php echo $n ?>>
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<input type="hidden" name=c value=<?php echo $c ?>>
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<input type="hidden" name=m value=<?php echo $m ?>>
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<input type="hidden" name=digits value=<?php echo $digits ?>>
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<table>
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<tr>
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<td>
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<input type="submit" name="submit" value="Next">
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</td>
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</tr>
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</table>
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</body>
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</html>
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