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package org.spongycastle.asn1.pkcs;
import java.util.Enumeration;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1OctetString;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.ASN1Set;
import org.spongycastle.asn1.ASN1TaggedObject;
import org.spongycastle.asn1.DEROctetString;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.DERTaggedObject;
import org.spongycastle.asn1.x509.AlgorithmIdentifier;
/**
* a PKCS#7 signer info object.
*/
public class SignerInfo
extends ASN1Object
{
private ASN1Integer version;
private IssuerAndSerialNumber issuerAndSerialNumber;
private AlgorithmIdentifier digAlgorithm;
private ASN1Set authenticatedAttributes;
private AlgorithmIdentifier digEncryptionAlgorithm;
private ASN1OctetString encryptedDigest;
private ASN1Set unauthenticatedAttributes;
public static SignerInfo getInstance(
Object o)
{
if (o instanceof SignerInfo)
{
return (SignerInfo)o;
}
else if (o instanceof ASN1Sequence)
{
return new SignerInfo((ASN1Sequence)o);
}
throw new IllegalArgumentException("unknown object in factory: " + o.getClass().getName());
}
public SignerInfo(
ASN1Integer version,
IssuerAndSerialNumber issuerAndSerialNumber,
AlgorithmIdentifier digAlgorithm,
ASN1Set authenticatedAttributes,
AlgorithmIdentifier digEncryptionAlgorithm,
ASN1OctetString encryptedDigest,
ASN1Set unauthenticatedAttributes)
{
this.version = version;
this.issuerAndSerialNumber = issuerAndSerialNumber;
this.digAlgorithm = digAlgorithm;
this.authenticatedAttributes = authenticatedAttributes;
this.digEncryptionAlgorithm = digEncryptionAlgorithm;
this.encryptedDigest = encryptedDigest;
this.unauthenticatedAttributes = unauthenticatedAttributes;
}
public SignerInfo(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
version = (ASN1Integer)e.nextElement();
issuerAndSerialNumber = IssuerAndSerialNumber.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 IssuerAndSerialNumber getIssuerAndSerialNumber()
{
return issuerAndSerialNumber;
}
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.
* <pre>
* SignerInfo ::= SEQUENCE {
* version Version,
* issuerAndSerialNumber IssuerAndSerialNumber,
* digestAlgorithm DigestAlgorithmIdentifier,
* authenticatedAttributes [0] IMPLICIT Attributes OPTIONAL,
* digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
* encryptedDigest EncryptedDigest,
* unauthenticatedAttributes [1] IMPLICIT Attributes OPTIONAL
* }
*
* EncryptedDigest ::= OCTET STRING
*
* DigestAlgorithmIdentifier ::= AlgorithmIdentifier
*
* DigestEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
* </pre>
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(version);
v.add(issuerAndSerialNumber);
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);
}
}
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