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Viewing changes to src/org/bouncycastle/jce/provider/RSAUtil.java

  • Committer: Brian Thomason
  • Date: 2011-12-20 17:20:32 UTC
  • Revision ID: brian.thomason@canonical.com-20111220172032-rdtm13jgdxtksacr
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src/org/bouncycastle/jce/provider/RSAUtil.java
 
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package org.bouncycastle.jce.provider;
 
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import java.security.interfaces.RSAPrivateCrtKey;
 
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import java.security.interfaces.RSAPrivateKey;
 
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import java.security.interfaces.RSAPublicKey;
 
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import org.bouncycastle.asn1.DERObjectIdentifier;
 
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import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
 
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import org.bouncycastle.asn1.x509.X509ObjectIdentifiers;
 
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import org.bouncycastle.crypto.params.RSAKeyParameters;
 
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import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters;
 
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/**
 
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 * utility class for converting java.security RSA objects into their
 
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 * org.bouncycastle.crypto counterparts.
 
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 */
 
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class RSAUtil
 
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{
 
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    static boolean isRsaOid(
 
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        DERObjectIdentifier algOid)
 
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    {
 
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        return algOid.equals(PKCSObjectIdentifiers.rsaEncryption)
 
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            || algOid.equals(X509ObjectIdentifiers.id_ea_rsa)
 
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            || algOid.equals(PKCSObjectIdentifiers.id_RSASSA_PSS)
 
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            || algOid.equals(PKCSObjectIdentifiers.id_RSAES_OAEP);
 
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    }
 
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    static RSAKeyParameters generatePublicKeyParameter(
 
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        RSAPublicKey    key)
 
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    {
 
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        return new RSAKeyParameters(false, key.getModulus(), key.getPublicExponent());
 
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    }
 
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    static RSAKeyParameters generatePrivateKeyParameter(
 
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        RSAPrivateKey    key)
 
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    {
 
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        if (key instanceof RSAPrivateCrtKey)
 
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        {
 
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            RSAPrivateCrtKey    k = (RSAPrivateCrtKey)key;
 
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            return new RSAPrivateCrtKeyParameters(k.getModulus(),
 
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                k.getPublicExponent(), k.getPrivateExponent(),
 
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                k.getPrimeP(), k.getPrimeQ(), k.getPrimeExponentP(),                            k.getPrimeExponentQ(), k.getCrtCoefficient());
 
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        }
 
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        else
 
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        {
 
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            RSAPrivateKey    k = key;
 
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            return new RSAKeyParameters(true, k.getModulus(), k.getPrivateExponent());
 
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        }
 
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    }
 
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}