114 lines
3.1 KiB
C#
114 lines
3.1 KiB
C#
using System;
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using System.Collections;
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using Org.BouncyCastle.Asn1;
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using Org.BouncyCastle.Asn1.X509;
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namespace Org.BouncyCastle.Asn1.Icao
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{
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/**
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* The LDSSecurityObject object.
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* <pre>
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* LDSSecurityObject ::= SEQUENCE {
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* version LDSSecurityObjectVersion,
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* hashAlgorithm DigestAlgorithmIdentifier,
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* dataGroupHashValues SEQUENCE SIZE (2..ub-DataGroups) OF DataHashGroup}
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*
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* DigestAlgorithmIdentifier ::= AlgorithmIdentifier,
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*
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* LDSSecurityObjectVersion :: INTEGER {V0(0)}
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* </pre>
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*/
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public class LdsSecurityObject
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: Asn1Encodable
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{
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public const int UBDataGroups = 16;
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internal DerInteger version = new DerInteger(0);
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internal AlgorithmIdentifier digestAlgorithmIdentifier;
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internal DataGroupHash[] datagroupHash;
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public static LdsSecurityObject GetInstance(
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object obj)
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{
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if (obj == null || obj is LdsSecurityObject)
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{
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return (LdsSecurityObject) obj;
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}
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if (obj is Asn1Sequence)
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{
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return new LdsSecurityObject(Asn1Sequence.GetInstance(obj));
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}
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throw new ArgumentException("unknown object in GetInstance: " + obj.GetType().FullName);
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}
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public LdsSecurityObject(
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Asn1Sequence seq)
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{
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if (seq == null || seq.Count == 0)
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{
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throw new ArgumentException("null or empty sequence passed.");
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}
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IEnumerator e = seq.GetEnumerator();
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// version
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e.MoveNext();
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version = DerInteger.GetInstance(e.Current);
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// digestAlgorithmIdentifier
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e.MoveNext();
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digestAlgorithmIdentifier = AlgorithmIdentifier.GetInstance(e.Current);
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e.MoveNext();
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Asn1Sequence datagroupHashSeq = Asn1Sequence.GetInstance(e.Current);
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CheckDatagroupHashSeqSize(datagroupHashSeq.Count);
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datagroupHash = new DataGroupHash[datagroupHashSeq.Count];
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for (int i= 0; i< datagroupHashSeq.Count; i++)
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{
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datagroupHash[i] = DataGroupHash.GetInstance(datagroupHashSeq[i]);
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}
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}
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public LdsSecurityObject(
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AlgorithmIdentifier digestAlgorithmIdentifier,
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DataGroupHash[] datagroupHash)
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{
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this.digestAlgorithmIdentifier = digestAlgorithmIdentifier;
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this.datagroupHash = datagroupHash;
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CheckDatagroupHashSeqSize(datagroupHash.Length);
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}
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private void CheckDatagroupHashSeqSize(int size)
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{
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if (size < 2 || size > UBDataGroups)
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{
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throw new ArgumentException("wrong size in DataGroupHashValues : not in (2.."+ UBDataGroups +")");
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}
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}
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public AlgorithmIdentifier DigestAlgorithmIdentifier
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{
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get { return digestAlgorithmIdentifier; }
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}
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public DataGroupHash[] GetDatagroupHash()
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{
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return datagroupHash;
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}
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public override Asn1Object ToAsn1Object()
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{
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return new DerSequence(
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version,
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digestAlgorithmIdentifier,
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new DerSequence(datagroupHash));
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}
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}
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}
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