Robin P. Clark
a4b3002f75
made it create a bc script for larger keys (rather thn make the web page wait for the long calculations).
64 lines
1.9 KiB
PHP
64 lines
1.9 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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$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 = $_POST['mprivate'];
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$m = $_POST['m'];
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echo "<h1> in encode.php m is $m</h1>";
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echo "<h1> Computes the cipher text c = m^e mod n.</h1>";
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echo "<h3> $m^$e%$n </h3>";
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$digits = `./pow_digits $m $e`;
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$gt100_k = `./gt100k $digits`;
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echo "digits",$digits;
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echo "<h3>m^e for this equation will produce a number with approx $digits digits</h3>";
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if ( $gt100_k != 1 ) {
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$m_to_e = `echo " $m ^ $e " | bc | sed -f ./nlhtml.sed `;
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echo $m_to_e;
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echo " % $n <p>";
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echo "<h3> this gives the'public key encoded' cipher result </h3>";
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echo "</p>";
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$c = `echo " ( $m ^ $e ) % $n " | bc`;
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echo $c;
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}
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else {
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echo "<h3> The number of digits produced by the exponentiation of m^e is greater than 100,0000 </h3>";
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echo "<h3> The resursive (see <a href=\"maths.html\"> recursive exponentiation break down </a>) ";
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echo "routines will be applied instead of direct implementation to calculate m^e%n </h3>";
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$c = `./cbe.sh 'A $m B $e C $n D'`; // php is very nasty about sending multiple args to scripts
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echo "<h3> this gives the 'public key encoded' cipher result </h3>";
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echo $c;
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}
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printf("<form enctype=\"multipart/form-data\" method=\"post\"
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action=\"encode_pub.php#DECODE\">");
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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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<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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