org.bouncycastle.asn1.cms.AuthEnvelopedData Maven / Gradle / Ivy

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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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/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * RFC 5083:
 *
 * CMS AuthEnveloped Data object.
 * 
 * ASN.1:
 * 
 * id-ct-authEnvelopedData OBJECT IDENTIFIER ::= { iso(1)
 *       member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9)
 *       smime(16) ct(1) 23 }
 *
 * AuthEnvelopedData ::= SEQUENCE {
 *       version CMSVersion,
 *       originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL,
 *       recipientInfos RecipientInfos,
 *       authEncryptedContentInfo EncryptedContentInfo,
 *       authAttrs [1] IMPLICIT AuthAttributes OPTIONAL,
 *       mac MessageAuthenticationCode,
 *       unauthAttrs [2] IMPLICIT UnauthAttributes OPTIONAL }
 * 
 */
public class AuthEnvelopedData
    extends ASN1Object
{
    private ASN1Integer version;
    private OriginatorInfo originatorInfo;
    private ASN1Set recipientInfos;
    private EncryptedContentInfo authEncryptedContentInfo;
    private ASN1Set authAttrs;
    private ASN1OctetString mac;
    private ASN1Set unauthAttrs;

    public AuthEnvelopedData(
        OriginatorInfo originatorInfo,
        ASN1Set recipientInfos,
        EncryptedContentInfo authEncryptedContentInfo,
        ASN1Set authAttrs,
        ASN1OctetString mac,
        ASN1Set unauthAttrs)
    {
        // "It MUST be set to 0."
        this.version = new ASN1Integer(0);

        this.originatorInfo = originatorInfo;

        // "There MUST be at least one element in the collection."
        this.recipientInfos = recipientInfos;
        if (this.recipientInfos.size() == 0)
        {
            throw new IllegalArgumentException("AuthEnvelopedData requires at least 1 RecipientInfo");
        }

        this.authEncryptedContentInfo = authEncryptedContentInfo;

        // "The authAttrs MUST be present if the content type carried in
        // EncryptedContentInfo is not id-data."
        this.authAttrs = authAttrs;
        if (!authEncryptedContentInfo.getContentType().equals(CMSObjectIdentifiers.data))
        {
            if (authAttrs == null || authAttrs.size() == 0)
            {
                throw new IllegalArgumentException("authAttrs must be present with non-data content");
            }
        }

        this.mac = mac;

        this.unauthAttrs = unauthAttrs;
    }

    /**
     * Constructs AuthEnvelopedData by parsing supplied ASN1Sequence
     * 
     * @param seq An ASN1Sequence with AuthEnvelopedData
     */
    private AuthEnvelopedData(
        ASN1Sequence seq)
    {
        int index = 0;

        // "It MUST be set to 0."
        ASN1Primitive tmp = seq.getObjectAt(index++).toASN1Primitive();
        version = (ASN1Integer)tmp;
        if (this.version.getValue().intValue() != 0)
        {
            throw new IllegalArgumentException("AuthEnvelopedData version number must be 0");
        }

        tmp = seq.getObjectAt(index++).toASN1Primitive();
        if (tmp instanceof ASN1TaggedObject)
        {
            originatorInfo = OriginatorInfo.getInstance((ASN1TaggedObject)tmp, false);
            tmp = seq.getObjectAt(index++).toASN1Primitive();
        }

        // "There MUST be at least one element in the collection."
        recipientInfos = ASN1Set.getInstance(tmp);
        if (this.recipientInfos.size() == 0)
        {
            throw new IllegalArgumentException("AuthEnvelopedData requires at least 1 RecipientInfo");
        }

        tmp = seq.getObjectAt(index++).toASN1Primitive();
        authEncryptedContentInfo = EncryptedContentInfo.getInstance(tmp);

        tmp = seq.getObjectAt(index++).toASN1Primitive();
        if (tmp instanceof ASN1TaggedObject)
        {
            authAttrs = ASN1Set.getInstance((ASN1TaggedObject)tmp, false);
            tmp = seq.getObjectAt(index++).toASN1Primitive();
        }
        else
        {
            // "The authAttrs MUST be present if the content type carried in
            // EncryptedContentInfo is not id-data."
            if (!authEncryptedContentInfo.getContentType().equals(CMSObjectIdentifiers.data))
            {
                if (authAttrs == null || authAttrs.size() == 0)
                {
                    throw new IllegalArgumentException("authAttrs must be present with non-data content");
                }
            }
        }

        mac = ASN1OctetString.getInstance(tmp);

        if (seq.size() > index)
        {
            tmp = seq.getObjectAt(index).toASN1Primitive();
            unauthAttrs = ASN1Set.getInstance((ASN1TaggedObject)tmp, false);
        }
    }

    /**
     * Return an AuthEnvelopedData object from a tagged object.
     * 

     * Accepted inputs:
     * 

     *  {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats
     * 
     *

     * @param obj      the tagged object holding the object we want.
     * @param explicit true if the object is meant to be explicitly
     *                 tagged false otherwise.
     * @return a reference that can be assigned to AuthEnvelopedData (may be null)
     * @throws IllegalArgumentException if the object held by the
     *                                  tagged object cannot be converted.
     */
    public static AuthEnvelopedData getInstance(
        ASN1TaggedObject obj,
        boolean explicit)
    {
        return getInstance(ASN1Sequence.getInstance(obj, explicit));
    }

    /**
     * Return an AuthEnvelopedData object from the given object.
     * 
     * Accepted inputs:
     * 

     *  null → null
     * 
 {@link AuthEnvelopedData} object
     * 
 {@link ASN1Sequence org.bouncycastle.asn1.ASN1Sequence} input formats with AuthEnvelopedData structure inside
     * 
     *
     * @param obj The object we want converted.
     * @return a reference that can be assigned to AuthEnvelopedData (may be null)
     * @throws IllegalArgumentException if the object cannot be converted, or was null.
     */
    public static AuthEnvelopedData getInstance(
        Object obj)
    {
        if (obj == null || obj instanceof AuthEnvelopedData)
        {
            return (AuthEnvelopedData)obj;
        }

        if (obj instanceof ASN1Sequence)
        {
            return new AuthEnvelopedData((ASN1Sequence)obj);
        }

        throw new IllegalArgumentException("Invalid AuthEnvelopedData: " + obj.getClass().getName());
    }

    public ASN1Integer getVersion()
    {
        return version;
    }

    public OriginatorInfo getOriginatorInfo()
    {
        return originatorInfo;
    }

    public ASN1Set getRecipientInfos()
    {
        return recipientInfos;
    }

    public EncryptedContentInfo getAuthEncryptedContentInfo()
    {
        return authEncryptedContentInfo;
    }

    public ASN1Set getAuthAttrs()
    {
        return authAttrs;
    }

    public ASN1OctetString getMac()
    {
        return mac;
    }

    public ASN1Set getUnauthAttrs()
    {
        return unauthAttrs;
    }

    /**
     * Produce an object suitable for an ASN1OutputStream.
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector();

        v.add(version);

        if (originatorInfo != null)
        {
            v.add(new DERTaggedObject(false, 0, originatorInfo));
        }

        v.add(recipientInfos);
        v.add(authEncryptedContentInfo);

        // "authAttrs optionally contains the authenticated attributes."
        if (authAttrs != null)
        {
            // "AuthAttributes MUST be DER encoded, even if the rest of the
            // AuthEnvelopedData structure is BER encoded."
            v.add(new DERTaggedObject(false, 1, authAttrs));
        }

        v.add(mac);

        // "unauthAttrs optionally contains the unauthenticated attributes."
        if (unauthAttrs != null)
        {
            v.add(new DERTaggedObject(false, 2, unauthAttrs));
        }

        return new BERSequence(v);
    }
}