1 files changed, 145 insertions, 0 deletions
diff --git a/Crypto/src/asn1/icao/LDSSecurityObject.cs b/Crypto/src/asn1/icao/LDSSecurityObject.cs
new file mode 100644
index 000000000..c33ca6877
--- /dev/null
+++ b/Crypto/src/asn1/icao/LDSSecurityObject.cs
@@ -0,0 +1,145 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.Icao
+{
+ /**
+ * The LDSSecurityObject object (V1.8).
+ * <pre>
+ * LDSSecurityObject ::= SEQUENCE {
+ * version LDSSecurityObjectVersion,
+ * hashAlgorithm DigestAlgorithmIdentifier,
+ * dataGroupHashValues SEQUENCE SIZE (2..ub-DataGroups) OF DataHashGroup,
+ * ldsVersionInfo LDSVersionInfo OPTIONAL
+ * -- if present, version MUST be v1 }
+ *
+ * DigestAlgorithmIdentifier ::= AlgorithmIdentifier,
+ *
+ * LDSSecurityObjectVersion :: INTEGER {V0(0)}
+ * </pre>
+ */
+ public class LdsSecurityObject
+ : Asn1Encodable
+ {
+ public const int UBDataGroups = 16;
+
+ private DerInteger version = new DerInteger(0);
+ private AlgorithmIdentifier digestAlgorithmIdentifier;
+ private DataGroupHash[] datagroupHash;
+ private LdsVersionInfo versionInfo;
+
+ public static LdsSecurityObject GetInstance(
+ object obj)
+ {
+ if (obj is LdsSecurityObject)
+ return (LdsSecurityObject)obj;
+
+ if (obj != null)
+ return new LdsSecurityObject(Asn1Sequence.GetInstance(obj));
+
+ return null;
+ }
+
+ private LdsSecurityObject(
+ Asn1Sequence seq)
+ {
+ if (seq == null || seq.Count == 0)
+ throw new ArgumentException("null or empty sequence passed.");
+
+ IEnumerator e = seq.GetEnumerator();
+
+ // version
+ e.MoveNext();
+ version = DerInteger.GetInstance(e.Current);
+ // digestAlgorithmIdentifier
+ e.MoveNext();
+ digestAlgorithmIdentifier = AlgorithmIdentifier.GetInstance(e.Current);
+
+ e.MoveNext();
+ Asn1Sequence datagroupHashSeq = Asn1Sequence.GetInstance(e.Current);
+
+ if (version.Value.Equals(BigInteger.One))
+ {
+ e.MoveNext();
+ versionInfo = LdsVersionInfo.GetInstance(e.Current);
+ }
+
+ CheckDatagroupHashSeqSize(datagroupHashSeq.Count);
+
+ datagroupHash = new DataGroupHash[datagroupHashSeq.Count];
+ for (int i= 0; i< datagroupHashSeq.Count; i++)
+ {
+ datagroupHash[i] = DataGroupHash.GetInstance(datagroupHashSeq[i]);
+ }
+ }
+
+ public LdsSecurityObject(
+ AlgorithmIdentifier digestAlgorithmIdentifier,
+ DataGroupHash[] datagroupHash)
+ {
+ this.version = new DerInteger(0);
+ this.digestAlgorithmIdentifier = digestAlgorithmIdentifier;
+ this.datagroupHash = datagroupHash;
+
+ CheckDatagroupHashSeqSize(datagroupHash.Length);
+ }
+
+
+ public LdsSecurityObject(
+ AlgorithmIdentifier digestAlgorithmIdentifier,
+ DataGroupHash[] datagroupHash,
+ LdsVersionInfo versionInfo)
+ {
+ this.version = new DerInteger(1);
+ this.digestAlgorithmIdentifier = digestAlgorithmIdentifier;
+ this.datagroupHash = datagroupHash;
+ this.versionInfo = versionInfo;
+
+ CheckDatagroupHashSeqSize(datagroupHash.Length);
+ }
+
+ private void CheckDatagroupHashSeqSize(int size)
+ {
+ if (size < 2 || size > UBDataGroups)
+ throw new ArgumentException("wrong size in DataGroupHashValues : not in (2.."+ UBDataGroups +")");
+ }
+
+ public BigInteger Version
+ {
+ get { return version.Value; }
+ }
+
+ public AlgorithmIdentifier DigestAlgorithmIdentifier
+ {
+ get { return digestAlgorithmIdentifier; }
+ }
+
+ public DataGroupHash[] GetDatagroupHash()
+ {
+ return datagroupHash;
+ }
+
+ public LdsVersionInfo VersionInfo
+ {
+ get { return versionInfo; }
+ }
+
+ public override Asn1Object ToAsn1Object()
+ {
+ DerSequence hashSeq = new DerSequence(datagroupHash);
+
+ Asn1EncodableVector v = new Asn1EncodableVector(version, digestAlgorithmIdentifier, hashSeq);
+
+ if (versionInfo != null)
+ {
+ v.Add(versionInfo);
+ }
+
+ return new DerSequence(v);
+ }
+ }
+}
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