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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.8 and up. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.operator.bc;

import java.io.IOException;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.crypto.AsymmetricBlockCipher;
import org.bouncycastle.crypto.encodings.PKCS1Encoding;
import org.bouncycastle.crypto.engines.RSABlindedEngine;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.util.PublicKeyFactory;

public class BcRSAAsymmetricKeyWrapper
    extends BcAsymmetricKeyWrapper
{
    public BcRSAAsymmetricKeyWrapper(AlgorithmIdentifier encAlgId, AsymmetricKeyParameter publicKey)
    {
        super(encAlgId, publicKey);
    }

    public BcRSAAsymmetricKeyWrapper(AlgorithmIdentifier encAlgId, SubjectPublicKeyInfo publicKeyInfo)
        throws IOException
    {
        super(encAlgId, PublicKeyFactory.createKey(publicKeyInfo));
    }

    protected AsymmetricBlockCipher createAsymmetricWrapper(ASN1ObjectIdentifier algorithm)
    {
        return new PKCS1Encoding(new RSABlindedEngine());
    }
}