70 lines
2.3 KiB
PHP
70 lines
2.3 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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<?
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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 $clear;
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}
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else {
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echo "<h3> The number of digits produced by the exponentiation of c^d is greater than 100,0000 </h3>";
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echo "<h3> The resursive (see <a href=\"maths.html\"> recursive exponentiation break down </a>) routines will be applied instead to calculate c^d%n </h3>";
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$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 "<h3> this gives the 'in clear' result </h3>";
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echo $clear;
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}
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$date = `date`;
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printf("<p> End Time == %s</p> \n",$date);
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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=<? echo $d ?>>
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<input type="hidden" name=q value=<? echo $q ?>>
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<input type="hidden" name=p value=<? echo $p ?>>
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<input type="hidden" name=phi value=<? echo $phi ?>>
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<input type="hidden" name=e value=<? echo $e ?>>
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<input type="hidden" name=n value=<? echo $n ?>>
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<input type="hidden" name=c value=<? echo $c ?>>
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<input type="hidden" name=m value=<? echo $m ?>>
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<input type="hidden" name=digits value=<? 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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