?? dsautil.java
?? 內容:基于jdk1.4的加密算法的具體實現
?? JAVA
字號:
??
package org.bouncycastle.jce.provider;import java.security.InvalidKeyException;import java.security.PrivateKey;import java.security.PublicKey;import java.security.interfaces.DSAPrivateKey;import java.security.interfaces.DSAPublicKey;import org.bouncycastle.crypto.params.AsymmetricKeyParameter;import org.bouncycastle.crypto.params.DSAParameters;import org.bouncycastle.crypto.params.DSAPrivateKeyParameters;import org.bouncycastle.crypto.params.DSAPublicKeyParameters;/** * utility class for converting jce/jca DSA objects * objects into their org.bouncycastle.crypto counterparts. */public class DSAUtil{ static public AsymmetricKeyParameter generatePublicKeyParameter( PublicKey key) throws InvalidKeyException { if (key instanceof DSAPublicKey) { DSAPublicKey k = (DSAPublicKey)key; return new DSAPublicKeyParameters(k.getY(), new DSAParameters(k.getParams().getP(), k.getParams().getQ(), k.getParams().getG())); } throw new InvalidKeyException("can't identify DSA public key: " + key.getClass().getName()); } static public AsymmetricKeyParameter generatePrivateKeyParameter( PrivateKey key) throws InvalidKeyException { if (key instanceof DSAPrivateKey) { DSAPrivateKey k = (DSAPrivateKey)key; return new DSAPrivateKeyParameters(k.getX(), new DSAParameters(k.getParams().getP(), k.getParams().getQ(), k.getParams().getG())); } throw new InvalidKeyException("can't identify DSA private key."); }}
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