using System; using Org.BouncyCastle.Asn1.Crmf; using Org.BouncyCastle.Asn1.X509; namespace Org.BouncyCastle.Asn1.Cmp { public class OobCertHash : Asn1Encodable { private readonly AlgorithmIdentifier hashAlg; private readonly CertId certId; private readonly DerBitString hashVal; private OobCertHash(Asn1Sequence seq) { int index = seq.Count - 1; hashVal = DerBitString.GetInstance(seq[index--]); for (int i = index; i >= 0; i--) { Asn1TaggedObject tObj = (Asn1TaggedObject)seq[i]; if (tObj.TagNo == 0) { hashAlg = AlgorithmIdentifier.GetInstance(tObj, true); } else { certId = CertId.GetInstance(tObj, true); } } } public static OobCertHash GetInstance(object obj) { if (obj is OobCertHash) return (OobCertHash)obj; if (obj is Asn1Sequence) return new OobCertHash((Asn1Sequence)obj); throw new ArgumentException("Invalid object: " + obj.GetType().Name, "obj"); } public virtual AlgorithmIdentifier HashAlg { get { return hashAlg; } } public virtual CertId CertID { get { return certId; } } /** *
		 * OobCertHash ::= SEQUENCE {
		 *                      hashAlg     [0] AlgorithmIdentifier     OPTIONAL,
		 *                      certId      [1] CertId                  OPTIONAL,
		 *                      hashVal         BIT STRING
		 *                      -- hashVal is calculated over the Der encoding of the
		 *                      -- self-signed certificate with the identifier certID.
		 *       }
		 * 
* @return a basic ASN.1 object representation. */ public override Asn1Object ToAsn1Object() { Asn1EncodableVector v = new Asn1EncodableVector(); AddOptional(v, 0, hashAlg); AddOptional(v, 1, certId); v.Add(hashVal); return new DerSequence(v); } private void AddOptional(Asn1EncodableVector v, int tagNo, Asn1Encodable obj) { if (obj != null) { v.Add(new DerTaggedObject(true, tagNo, obj)); } } } }