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<p></p> <p><b>Новая страница</b></p><div>== use of X509EncodedKeySpec ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> import java.security.KeyFactory;<br /> import java.security.KeyPair;<br /> import java.security.KeyPairGenerator;<br /> import java.security.PublicKey;<br /> import java.security.SecureRandom;<br /> import java.security.Security;<br /> import java.security.spec.X509EncodedKeySpec;<br /> import org.bouncycastle.asn1.ASN1InputStream;<br /> import org.bouncycastle.asn1.util.ASN1Dump;<br /> import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;<br /> public class MainClass {<br /> public static void main(String[] args) throws Exception {<br /> Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());<br /> KeyPairGenerator generator = KeyPairGenerator.getInstance(&quot;RSA&quot;, &quot;BC&quot;);<br /> generator.initialize(128, new SecureRandom());<br /> KeyPair pair = generator.generateKeyPair();<br /> ASN1InputStream aIn = new ASN1InputStream(pair.getPublic().getEncoded());<br /> SubjectPublicKeyInfo info = SubjectPublicKeyInfo.getInstance(aIn.readObject());<br /> System.out.println(ASN1Dump.dumpAsString(info));<br /> System.out.println(ASN1Dump.dumpAsString(info.getPublicKey()));<br /> X509EncodedKeySpec x509Spec = new X509EncodedKeySpec(pair.getPublic().getEncoded());<br /> KeyFactory keyFact = KeyFactory.getInstance(&quot;RSA&quot;, &quot;BC&quot;);<br /> PublicKey pubKey = keyFact.generatePublic(x509Spec);<br /> System.out.println(pubKey.equals(pair.getPublic()));<br /> }<br /> }<br /> /*<br /> DER Sequence<br /> DER Sequence<br /> ObjectIdentifier(1.2.840.113549.1.1.1)<br /> NULL<br /> DER Bit String[26, 0] <br /> DER Sequence<br /> Integer(171211678289811562909793981152149017387)<br /> Integer(65537)<br /> true<br /> */&lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;</div>