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package org.bouncycastle.jce.provider;
import java.security.interfaces.RSAPrivateCrtKey;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.X509ObjectIdentifiers;
import org.bouncycastle.crypto.params.RSAKeyParameters;
import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters;
/**
* utility class for converting java.security RSA objects into their
* org.bouncycastle.crypto counterparts.
*/
class RSAUtil
{
static boolean isRsaOid(
DERObjectIdentifier algOid)
{
return algOid.equals(PKCSObjectIdentifiers.rsaEncryption)
|| algOid.equals(X509ObjectIdentifiers.id_ea_rsa)
|| algOid.equals(PKCSObjectIdentifiers.id_RSASSA_PSS)
|| algOid.equals(PKCSObjectIdentifiers.id_RSAES_OAEP);
}
static RSAKeyParameters generatePublicKeyParameter(
RSAPublicKey key)
{
return new RSAKeyParameters(false, key.getModulus(), key.getPublicExponent());
}
static RSAKeyParameters generatePrivateKeyParameter(
RSAPrivateKey key)
{
if (key instanceof RSAPrivateCrtKey)
{
RSAPrivateCrtKey k = (RSAPrivateCrtKey)key;
return new RSAPrivateCrtKeyParameters(k.getModulus(),
k.getPublicExponent(), k.getPrivateExponent(),
k.getPrimeP(), k.getPrimeQ(), k.getPrimeExponentP(), k.getPrimeExponentQ(), k.getCrtCoefficient());
}
else
{
RSAPrivateKey k = key;
return new RSAKeyParameters(true, k.getModulus(), k.getPrivateExponent());
}
}
}
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