org.bouncycastle.asn1.cms.SignerInfo 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 java.util.Enumeration;

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.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

/**
 * RFC 5652:
 * Signature container per Signer, see {@link SignerIdentifier}.
 *  * PKCS#7:
 *
 * SignerInfo ::= SEQUENCE {
 *     version                   Version,
 *     sid                       SignerIdentifier,
 *     digestAlgorithm           DigestAlgorithmIdentifier,
 *     authenticatedAttributes   [0] IMPLICIT Attributes OPTIONAL,
 *     digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
 *     encryptedDigest           EncryptedDigest,
 *     unauthenticatedAttributes [1] IMPLICIT Attributes OPTIONAL
 * }
 *
 * EncryptedDigest ::= OCTET STRING
 *
 * DigestAlgorithmIdentifier ::= AlgorithmIdentifier
 *
 * DigestEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
 *
 * -----------------------------------------
 *
 * RFC 5652:
 *
 * SignerInfo ::= SEQUENCE {
 *     version            CMSVersion,
 *     sid                SignerIdentifier,
 *     digestAlgorithm    DigestAlgorithmIdentifier,
 *     signedAttrs        [0] IMPLICIT SignedAttributes OPTIONAL,
 *     signatureAlgorithm SignatureAlgorithmIdentifier,
 *     signature          SignatureValue,
 *     unsignedAttrs      [1] IMPLICIT UnsignedAttributes OPTIONAL
 * }
 *
 * -- {@link SignerIdentifier} referenced certificates are at containing
 * -- {@link SignedData} certificates element.
 *
 * SignerIdentifier ::= CHOICE {
 *     issuerAndSerialNumber {@link IssuerAndSerialNumber},
 *     subjectKeyIdentifier  [0] SubjectKeyIdentifier }
 *
 * -- See {@link Attributes} for generalized SET OF {@link Attribute}
 *
 * SignedAttributes   ::= SET SIZE (1..MAX) OF Attribute
 * UnsignedAttributes ::= SET SIZE (1..MAX) OF Attribute
 * 
 * {@link Attribute} ::= SEQUENCE {
 *     attrType   OBJECT IDENTIFIER,
 *     attrValues SET OF AttributeValue }
 *
 * AttributeValue ::= ANY
 * 
 * SignatureValue ::= OCTET STRING
 * 
 */
public class SignerInfo
    extends ASN1Object
{
    private ASN1Integer              version;
    private SignerIdentifier        sid;
    private AlgorithmIdentifier     digAlgorithm;
    private ASN1Set                 authenticatedAttributes;
    private AlgorithmIdentifier     digEncryptionAlgorithm;
    private ASN1OctetString         encryptedDigest;
    private ASN1Set                 unauthenticatedAttributes;

    /**
     * Return a SignerInfo object from the given input
     * 
     * Accepted inputs:
     * 

     *  null → null
     * 
 {@link SignerInfo} object
     * 
 {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with SignerInfo structure inside
     * 
     *
     * @param o the object we want converted.
     * @exception IllegalArgumentException if the object cannot be converted.
     */
    public static SignerInfo getInstance(
        Object  o)
        throws IllegalArgumentException
    {
        if (o instanceof SignerInfo)
        {
            return (SignerInfo)o;
        }
        else if (o != null)
        {
            return new SignerInfo(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    /**
     *
     * @param sid
     * @param digAlgorithm            CMS knows as 'digestAlgorithm'
     * @param authenticatedAttributes CMS knows as 'signedAttrs'
     * @param digEncryptionAlgorithm  CMS knows as 'signatureAlgorithm'
     * @param encryptedDigest         CMS knows as 'signature'
     * @param unauthenticatedAttributes CMS knows as 'unsignedAttrs'
     */
    public SignerInfo(
        SignerIdentifier        sid,
        AlgorithmIdentifier     digAlgorithm,
        ASN1Set                 authenticatedAttributes,
        AlgorithmIdentifier     digEncryptionAlgorithm,
        ASN1OctetString         encryptedDigest,
        ASN1Set                 unauthenticatedAttributes)
    {
        if (sid.isTagged())
        {
            this.version = new ASN1Integer(3);
        }
        else
        {
            this.version = new ASN1Integer(1);
        }

        this.sid = sid;
        this.digAlgorithm = digAlgorithm;
        this.authenticatedAttributes = authenticatedAttributes;
        this.digEncryptionAlgorithm = digEncryptionAlgorithm;
        this.encryptedDigest = encryptedDigest;
        this.unauthenticatedAttributes = unauthenticatedAttributes;
    }

    /**
     *
     * @param sid
     * @param digAlgorithm            CMS knows as 'digestAlgorithm'
     * @param authenticatedAttributes CMS knows as 'signedAttrs'
     * @param digEncryptionAlgorithm  CMS knows as 'signatureAlgorithm'
     * @param encryptedDigest         CMS knows as 'signature'
     * @param unauthenticatedAttributes CMS knows as 'unsignedAttrs'
     */
    public SignerInfo(
        SignerIdentifier        sid,
        AlgorithmIdentifier     digAlgorithm,
        Attributes              authenticatedAttributes,
        AlgorithmIdentifier     digEncryptionAlgorithm,
        ASN1OctetString         encryptedDigest,
        Attributes              unauthenticatedAttributes)
    {
        if (sid.isTagged())
        {
            this.version = new ASN1Integer(3);
        }
        else
        {
            this.version = new ASN1Integer(1);
        }

        this.sid = sid;
        this.digAlgorithm = digAlgorithm;
        this.authenticatedAttributes = ASN1Set.getInstance(authenticatedAttributes);
        this.digEncryptionAlgorithm = digEncryptionAlgorithm;
        this.encryptedDigest = encryptedDigest;
        this.unauthenticatedAttributes = ASN1Set.getInstance(unauthenticatedAttributes);
    }

    private SignerInfo(
        ASN1Sequence seq)
    {
        Enumeration     e = seq.getObjects();

        version = (ASN1Integer)e.nextElement();
        sid = SignerIdentifier.getInstance(e.nextElement());
        digAlgorithm = AlgorithmIdentifier.getInstance(e.nextElement());

        Object obj = e.nextElement();

        if (obj instanceof ASN1TaggedObject)
        {
            authenticatedAttributes = ASN1Set.getInstance((ASN1TaggedObject)obj, false);

            digEncryptionAlgorithm = AlgorithmIdentifier.getInstance(e.nextElement());
        }
        else
        {
            authenticatedAttributes = null;
            digEncryptionAlgorithm = AlgorithmIdentifier.getInstance(obj);
        }

        encryptedDigest = DEROctetString.getInstance(e.nextElement());

        if (e.hasMoreElements())
        {
            unauthenticatedAttributes = ASN1Set.getInstance((ASN1TaggedObject)e.nextElement(), false);
        }
        else
        {
            unauthenticatedAttributes = null;
        }
    }

    public ASN1Integer getVersion()
    {
        return version;
    }

    public SignerIdentifier getSID()
    {
        return sid;
    }

    public ASN1Set getAuthenticatedAttributes()
    {
        return authenticatedAttributes;
    }

    public AlgorithmIdentifier getDigestAlgorithm()
    {
        return digAlgorithm;
    }

    public ASN1OctetString getEncryptedDigest()
    {
        return encryptedDigest;
    }

    public AlgorithmIdentifier getDigestEncryptionAlgorithm()
    {
        return digEncryptionAlgorithm;
    }

    public ASN1Set getUnauthenticatedAttributes()
    {
        return unauthenticatedAttributes;
    }

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

        v.add(version);
        v.add(sid);
        v.add(digAlgorithm);

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

        v.add(digEncryptionAlgorithm);
        v.add(encryptedDigest);

        if (unauthenticatedAttributes != null)
        {
            v.add(new DERTaggedObject(false, 1, unauthenticatedAttributes));
        }

        return new DERSequence(v);
    }
}