http://www.jexp.ru/index.php?action=history&feed=atom&title=Java%2FSecurity%2FDigital_Signature_Algorithm_DSA 2026-04-21T21:48:21Z История изменений этой страницы в вики MediaWiki 1.30.0 http://www.jexp.ru/index.php?title=Java/Security/Digital_Signature_Algorithm_DSA&diff=7627&oldid=prev 2010-06-01T06:49:00Z

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<p></p> <p><b>Новая страница</b></p><div>== Create the DSA key factory from a Set of Digital Signature Algorithm (DSA) Parameters ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> <br /> import java.math.BigInteger;<br /> import java.security.KeyFactory;<br /> import java.security.KeyPair;<br /> import java.security.KeyPairGenerator;<br /> import java.security.PrivateKey;<br /> import java.security.PublicKey;<br /> import java.security.interfaces.DSAParams;<br /> import java.security.interfaces.DSAPrivateKey;<br /> import java.security.interfaces.DSAPublicKey;<br /> import java.security.spec.DSAPrivateKeySpec;<br /> import java.security.spec.DSAPublicKeySpec;<br /> import java.security.spec.KeySpec;<br /> public class Main {<br /> public static void main(String[] argv) throws Exception {<br /> KeyPairGenerator keyGen = KeyPairGenerator.getInstance(&quot;DSA&quot;);<br /> keyGen.initialize(1024);<br /> KeyPair keypair = keyGen.genKeyPair();<br /> DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();<br /> DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();<br /> DSAParams dsaParams = privateKey.getParams();<br /> BigInteger p = dsaParams.getP();<br /> BigInteger q = dsaParams.getQ();<br /> BigInteger g = dsaParams.getG();<br /> BigInteger x = privateKey.getX();<br /> BigInteger y = publicKey.getY();<br /> KeyFactory keyFactory = KeyFactory.getInstance(&quot;DSA&quot;);<br /> }<br /> }<br /> <br /> &lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;<br /> <br /> <br /> <br /> <br /> <br /> == Create the DSA private key from a Set of Digital Signature Algorithm (DSA) Parameters ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> <br /> import java.math.BigInteger;<br /> import java.security.KeyFactory;<br /> import java.security.KeyPair;<br /> import java.security.KeyPairGenerator;<br /> import java.security.PrivateKey;<br /> import java.security.PublicKey;<br /> import java.security.interfaces.DSAParams;<br /> import java.security.interfaces.DSAPrivateKey;<br /> import java.security.interfaces.DSAPublicKey;<br /> import java.security.spec.DSAPrivateKeySpec;<br /> import java.security.spec.DSAPublicKeySpec;<br /> import java.security.spec.KeySpec;<br /> public class Main {<br /> public static void main(String[] argv) throws Exception {<br /> KeyPairGenerator keyGen = KeyPairGenerator.getInstance(&quot;DSA&quot;);<br /> keyGen.initialize(1024);<br /> KeyPair keypair = keyGen.genKeyPair();<br /> DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();<br /> DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();<br /> DSAParams dsaParams = privateKey.getParams();<br /> BigInteger p = dsaParams.getP();<br /> BigInteger q = dsaParams.getQ();<br /> BigInteger g = dsaParams.getG();<br /> BigInteger x = privateKey.getX();<br /> BigInteger y = publicKey.getY();<br /> KeyFactory keyFactory = KeyFactory.getInstance(&quot;DSA&quot;);<br /> KeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g);<br /> PrivateKey privateKey1 = keyFactory.generatePrivate(privateKeySpec);<br /> }<br /> }<br /> <br /> &lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;<br /> <br /> <br /> <br /> <br /> <br /> == Create the DSA public key from a Set of Digital Signature Algorithm (DSA) Parameters ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> <br /> import java.math.BigInteger;<br /> import java.security.KeyFactory;<br /> import java.security.KeyPair;<br /> import java.security.KeyPairGenerator;<br /> import java.security.PrivateKey;<br /> import java.security.PublicKey;<br /> import java.security.interfaces.DSAParams;<br /> import java.security.interfaces.DSAPrivateKey;<br /> import java.security.interfaces.DSAPublicKey;<br /> import java.security.spec.DSAPrivateKeySpec;<br /> import java.security.spec.DSAPublicKeySpec;<br /> import java.security.spec.KeySpec;<br /> public class Main {<br /> public static void main(String[] argv) throws Exception {<br /> KeyPairGenerator keyGen = KeyPairGenerator.getInstance(&quot;DSA&quot;);<br /> keyGen.initialize(1024);<br /> KeyPair keypair = keyGen.genKeyPair();<br /> DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();<br /> DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();<br /> DSAParams dsaParams = privateKey.getParams();<br /> BigInteger p = dsaParams.getP();<br /> BigInteger q = dsaParams.getQ();<br /> BigInteger g = dsaParams.getG();<br /> BigInteger x = privateKey.getX();<br /> BigInteger y = publicKey.getY();<br /> KeyFactory keyFactory = KeyFactory.getInstance(&quot;DSA&quot;);<br /> KeySpec publicKeySpec = new DSAPublicKeySpec(y, p, q, g);<br /> PublicKey publicKey1 = keyFactory.generatePublic(publicKeySpec);<br /> }<br /> }<br /> <br /> &lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;<br /> <br /> <br /> <br /> <br /> <br /> == Getting the Digital Signature Algorithm (DSA) Parameters of a Key Pair ==<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.interfaces.DSAParams;<br /> import java.security.interfaces.DSAPrivateKey;<br /> import java.security.interfaces.DSAPublicKey;<br /> public class Main {<br /> public static void main(String[] argv) throws Exception {<br /> KeyPairGenerator keyGen = KeyPairGenerator.getInstance(&quot;DSA&quot;);<br /> keyGen.initialize(1024);<br /> KeyPair keypair = keyGen.genKeyPair();<br /> DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();<br /> DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();<br /> DSAParams dsaParams = privateKey.getParams();<br /> BigInteger p = dsaParams.getP();<br /> BigInteger q = dsaParams.getQ();<br /> BigInteger g = dsaParams.getG();<br /> BigInteger x = privateKey.getX();<br /> BigInteger y = publicKey.getY();<br /> }<br /> }<br /> <br /> &lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;</div>