http://www.jexp.ru/index.php?action=history&feed=atom&title=Java_by_API%2Fjava.security.spec%2FECParameterSpec 2026-04-26T20:59:31Z История изменений этой страницы в вики MediaWiki 1.30.0 http://www.jexp.ru/index.php?title=Java_by_API/java.security.spec/ECParameterSpec&diff=2349&oldid=prev 2010-05-31T17:43:48Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <tr style="vertical-align: top;" lang="ru"> <td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td> <td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 17:43, 31 мая 2010</td> </tr><tr><td colspan="2" style="text-align: center;" lang="ru"><div class="mw-diff-empty">(нет различий)</div> </td></tr></table>

http://www.jexp.ru/index.php?title=Java_by_API/java.security.spec/ECParameterSpec&diff=2350&oldid=prev 2010-05-31T14:44:20Z

<p>1 версия</p> <p><b>Новая страница</b></p><div>== new ECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h) ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> <br /> <br /> import java.math.BigInteger;<br /> import java.security.KeyPair;<br /> import java.security.KeyPairGenerator;<br /> import java.security.MessageDigest;<br /> import java.security.SecureRandom;<br /> import java.security.Security;<br /> import java.security.spec.ECFieldFp;<br /> import java.security.spec.ECParameterSpec;<br /> import java.security.spec.ECPoint;<br /> import java.security.spec.EllipticCurve;<br /> import javax.crypto.KeyAgreement;<br /> public class MainClass {<br /> public static void main(String[] args) throws Exception {<br /> // Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());<br /> KeyPairGenerator keyGen = KeyPairGenerator.getInstance(&quot;ECDH&quot;, &quot;BC&quot;);<br /> EllipticCurve curve = new EllipticCurve(new ECFieldFp(new BigInteger(<br /> &quot;fffffffffffffffffffffffffffffffeffffffffffffffff&quot;, 16)), new BigInteger(<br /> &quot;fffffffffffffffffffffffffffffffefffffffffffffffc&quot;, 16), new BigInteger(<br /> &quot;fffffffffffffffffffffffffffffffefffffffffffffffc&quot;, 16));<br /> ECParameterSpec ecSpec = new ECParameterSpec(curve, new ECPoint(new BigInteger(<br /> &quot;fffffffffffffffffffffffffffffffefffffffffffffffc&quot;, 16), new BigInteger(<br /> &quot;fffffffffffffffffffffffffffffffefffffffffffffffc&quot;, 16)), new BigInteger(<br /> &quot;fffffffffffffffffffffffffffffffefffffffffffffffc&quot;, 16), 1);<br /> keyGen.initialize(ecSpec, new SecureRandom());<br /> KeyAgreement aKeyAgree = KeyAgreement.getInstance(&quot;ECDH&quot;, &quot;BC&quot;);<br /> KeyPair aPair = keyGen.generateKeyPair();<br /> KeyAgreement bKeyAgree = KeyAgreement.getInstance(&quot;ECDH&quot;, &quot;BC&quot;);<br /> KeyPair bPair = keyGen.generateKeyPair();<br /> aKeyAgree.init(aPair.getPrivate());<br /> bKeyAgree.init(bPair.getPrivate());<br /> aKeyAgree.doPhase(bPair.getPublic(), true);<br /> bKeyAgree.doPhase(aPair.getPublic(), true);<br /> MessageDigest hash = MessageDigest.getInstance(&quot;SHA1&quot;, &quot;BC&quot;);<br /> System.out.println(new String(hash.digest(aKeyAgree.generateSecret())));<br /> System.out.println(new String(hash.digest(bKeyAgree.generateSecret())));<br /> }<br /> }<br /> <br /> <br /> &lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;</div>

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