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using System;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.X509
{
/**
* ObjectDigestInfo ASN.1 structure used in v2 attribute certificates.
*
* <pre>
*
* ObjectDigestInfo ::= SEQUENCE {
* digestedObjectType ENUMERATED {
* publicKey (0),
* publicKeyCert (1),
* otherObjectTypes (2) },
* -- otherObjectTypes MUST NOT
* -- be used in this profile
* otherObjectTypeID OBJECT IDENTIFIER OPTIONAL,
* digestAlgorithm AlgorithmIdentifier,
* objectDigest BIT STRING
* }
*
* </pre>
*
*/
public class ObjectDigestInfo
: Asn1Encodable
{
/**
* The public key is hashed.
*/
public const int PublicKey = 0;
/**
* The public key certificate is hashed.
*/
public const int PublicKeyCert = 1;
/**
* An other object is hashed.
*/
public const int OtherObjectDigest = 2;
internal readonly DerEnumerated digestedObjectType;
internal readonly DerObjectIdentifier otherObjectTypeID;
internal readonly AlgorithmIdentifier digestAlgorithm;
internal readonly DerBitString objectDigest;
public static ObjectDigestInfo GetInstance(
object obj)
{
if (obj == null || obj is ObjectDigestInfo)
{
return (ObjectDigestInfo) obj;
}
if (obj is Asn1Sequence)
{
return new ObjectDigestInfo((Asn1Sequence) obj);
}
throw new ArgumentException("unknown object in factory: " + Platform.GetTypeName(obj), "obj");
}
public static ObjectDigestInfo GetInstance(
Asn1TaggedObject obj,
bool isExplicit)
{
return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
}
/**
* Constructor from given details.
* <p>
* If <code>digestedObjectType</code> is not {@link #publicKeyCert} or
* {@link #publicKey} <code>otherObjectTypeID</code> must be given,
* otherwise it is ignored.</p>
*
* @param digestedObjectType The digest object type.
* @param otherObjectTypeID The object type ID for
* <code>otherObjectDigest</code>.
* @param digestAlgorithm The algorithm identifier for the hash.
* @param objectDigest The hash value.
*/
public ObjectDigestInfo(
int digestedObjectType,
string otherObjectTypeID,
AlgorithmIdentifier digestAlgorithm,
byte[] objectDigest)
{
this.digestedObjectType = new DerEnumerated(digestedObjectType);
if (digestedObjectType == OtherObjectDigest)
{
this.otherObjectTypeID = new DerObjectIdentifier(otherObjectTypeID);
}
this.digestAlgorithm = digestAlgorithm;
this.objectDigest = new DerBitString(objectDigest);
}
private ObjectDigestInfo(
Asn1Sequence seq)
{
if (seq.Count > 4 || seq.Count < 3)
{
throw new ArgumentException("Bad sequence size: " + seq.Count);
}
digestedObjectType = DerEnumerated.GetInstance(seq[0]);
int offset = 0;
if (seq.Count == 4)
{
otherObjectTypeID = DerObjectIdentifier.GetInstance(seq[1]);
offset++;
}
digestAlgorithm = AlgorithmIdentifier.GetInstance(seq[1 + offset]);
objectDigest = DerBitString.GetInstance(seq[2 + offset]);
}
public DerEnumerated DigestedObjectType
{
get { return digestedObjectType; }
}
public DerObjectIdentifier OtherObjectTypeID
{
get { return otherObjectTypeID; }
}
public AlgorithmIdentifier DigestAlgorithm
{
get { return digestAlgorithm; }
}
public DerBitString ObjectDigest
{
get { return objectDigest; }
}
/**
* Produce an object suitable for an Asn1OutputStream.
*
* <pre>
*
* ObjectDigestInfo ::= SEQUENCE {
* digestedObjectType ENUMERATED {
* publicKey (0),
* publicKeyCert (1),
* otherObjectTypes (2) },
* -- otherObjectTypes MUST NOT
* -- be used in this profile
* otherObjectTypeID OBJECT IDENTIFIER OPTIONAL,
* digestAlgorithm AlgorithmIdentifier,
* objectDigest BIT STRING
* }
*
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(digestedObjectType);
v.AddOptional(otherObjectTypeID);
v.Add(digestAlgorithm, objectDigest);
return new DerSequence(v);
}
}
}
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