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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.oer.its.etsi102941;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.oer.its.etsi102941.basetypes.EcSignature;
import org.bouncycastle.oer.its.etsi102941.basetypes.PublicKeys;
import org.bouncycastle.util.Arrays;

/**
 * InnerAtRequest ::= SEQUENCE {
 * publicKeys                    PublicKeys,
 * hmacKey                       OCTET STRING (SIZE(32)),
 * sharedAtRequest               SharedAtRequest,
 * ecSignature                   EcSignature,
 * ...
 * }
 */
public class InnerAtRequest
    extends ASN1Object
{

    private final PublicKeys publicKeys;
    private final ASN1OctetString hmacKey;
    private final SharedAtRequest sharedAtRequest;
    private final EcSignature ecSignature;

    public InnerAtRequest(
        PublicKeys publicKeys,
        ASN1OctetString hmacKey,
        SharedAtRequest sharedAtRequest,
        EcSignature ecSignature)
    {
        this.publicKeys = publicKeys;
        this.hmacKey = hmacKey;
        this.sharedAtRequest = sharedAtRequest;
        this.ecSignature = ecSignature;
    }

    private InnerAtRequest(ASN1Sequence seq)
    {
        if (seq.size() != 4)
        {
            throw new IllegalArgumentException("expected sequence size of 4");
        }

        publicKeys = PublicKeys.getInstance(seq.getObjectAt(0));
        hmacKey = ASN1OctetString.getInstance(seq.getObjectAt(1));
        sharedAtRequest = SharedAtRequest.getInstance(seq.getObjectAt(2));
        ecSignature = EcSignature.getInstance(seq.getObjectAt(3));

    }

    public static InnerAtRequest getInstance(Object o)
    {
        if (o instanceof InnerAtRequest)
        {
            return (InnerAtRequest)o;
        }

        if (o != null)
        {
            return new InnerAtRequest(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    public PublicKeys getPublicKeys()
    {
        return publicKeys;
    }

    public ASN1OctetString getHmacKey()
    {
        return hmacKey;
    }

    public SharedAtRequest getSharedAtRequest()
    {
        return sharedAtRequest;
    }

    public EcSignature getEcSignature()
    {
        return ecSignature;
    }

    public ASN1Primitive toASN1Primitive()
    {
        return new DERSequence(new ASN1Encodable[]{publicKeys, hmacKey, sharedAtRequest, ecSignature});
    }

    public static Builder builder()
    {
        return new Builder();
    }

    public static class Builder
    {
        private PublicKeys publicKeys;
        private ASN1OctetString hmacKey;
        private SharedAtRequest sharedAtRequest;
        private EcSignature ecSignature;

        public Builder setPublicKeys(PublicKeys publicKeys)
        {
            this.publicKeys = publicKeys;
            return this;
        }

        public Builder setHmacKey(ASN1OctetString hmacKey)
        {
            this.hmacKey = hmacKey;
            return this;
        }

        public Builder setHmacKey(byte[] hmacKey)
        {
            this.hmacKey = new DEROctetString(Arrays.clone(hmacKey));
            return this;
        }

        public Builder setSharedAtRequest(SharedAtRequest sharedAtRequest)
        {
            this.sharedAtRequest = sharedAtRequest;
            return this;
        }

        public Builder setEcSignature(EcSignature ecSignature)
        {
            this.ecSignature = ecSignature;
            return this;
        }

        public InnerAtRequest createInnerAtRequest()
        {
            return new InnerAtRequest(publicKeys, hmacKey, sharedAtRequest, ecSignature);
        }
    }

}