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-rw-r--r--crypto/src/asn1/x509/AttributeCertificateInfo.cs40
-rw-r--r--crypto/src/asn1/x509/Holder.cs14
2 files changed, 36 insertions, 18 deletions
diff --git a/crypto/src/asn1/x509/AttributeCertificateInfo.cs b/crypto/src/asn1/x509/AttributeCertificateInfo.cs
index a62b01981..29abaa6e4 100644
--- a/crypto/src/asn1/x509/AttributeCertificateInfo.cs
+++ b/crypto/src/asn1/x509/AttributeCertificateInfo.cs
@@ -43,20 +43,31 @@ namespace Org.BouncyCastle.Asn1.X509
 		private AttributeCertificateInfo(
             Asn1Sequence seq)
         {
-			if (seq.Count < 7 || seq.Count > 9)
+			if (seq.Count < 6 || seq.Count > 9)
 			{
 				throw new ArgumentException("Bad sequence size: " + seq.Count);
 			}
 
-			this.version = DerInteger.GetInstance(seq[0]);
-            this.holder = Holder.GetInstance(seq[1]);
-            this.issuer = AttCertIssuer.GetInstance(seq[2]);
-            this.signature = AlgorithmIdentifier.GetInstance(seq[3]);
-            this.serialNumber = DerInteger.GetInstance(seq[4]);
-            this.attrCertValidityPeriod = AttCertValidityPeriod.GetInstance(seq[5]);
-            this.attributes = Asn1Sequence.GetInstance(seq[6]);
+            int start;
+            if (seq[0] is DerInteger)   // in version 1 certs version is DEFAULT  v1(0)
+            {
+                this.version = DerInteger.GetInstance(seq[0]);
+                start = 1;
+            }
+            else
+            {
+                this.version = new DerInteger(0);
+                start = 0;
+            }
+
+            this.holder = Holder.GetInstance(seq[start]);
+            this.issuer = AttCertIssuer.GetInstance(seq[start + 1]);
+            this.signature = AlgorithmIdentifier.GetInstance(seq[start + 2]);
+            this.serialNumber = DerInteger.GetInstance(seq[start + 3]);
+            this.attrCertValidityPeriod = AttCertValidityPeriod.GetInstance(seq[start + 4]);
+            this.attributes = Asn1Sequence.GetInstance(seq[start + 5]);
 
-			for (int i = 7; i < seq.Count; i++)
+			for (int i = start + 6; i < seq.Count; i++)
             {
                 Asn1Encodable obj = (Asn1Encodable) seq[i];
 
@@ -136,9 +147,16 @@ namespace Org.BouncyCastle.Asn1.X509
          */
         public override Asn1Object ToAsn1Object()
         {
-            Asn1EncodableVector v = new Asn1EncodableVector(version, holder, issuer, signature, serialNumber,
-                attrCertValidityPeriod, attributes);
+            Asn1EncodableVector v = new Asn1EncodableVector(9);
+
+            if (version.IntValueExact != 0)
+            {
+                v.Add(version);
+            }
+
+            v.Add(holder, issuer, signature, serialNumber, attrCertValidityPeriod, attributes);
             v.AddOptional(issuerUniqueID, extensions);
+
             return new DerSequence(v);
         }
     }
diff --git a/crypto/src/asn1/x509/Holder.cs b/crypto/src/asn1/x509/Holder.cs
index b67c0b6c7..90df75a0f 100644
--- a/crypto/src/asn1/x509/Holder.cs
+++ b/crypto/src/asn1/x509/Holder.cs
@@ -27,9 +27,9 @@ namespace Org.BouncyCastle.Asn1.X509
 	 * 
 	 * <pre>
 	 *         subject CHOICE {
-	 *          baseCertificateID [0] IssuerSerial,
+	 *          baseCertificateID [0] EXPLICIT IssuerSerial,
 	 *          -- associated with a Public Key Certificate
-	 *          subjectName [1] GeneralNames },
+	 *          subjectName [1] EXPLICIT GeneralNames },
 	 *          -- associated with a name
 	 * </pre>
 	 * </p>
@@ -74,10 +74,10 @@ namespace Org.BouncyCastle.Asn1.X509
 			switch (tagObj.TagNo)
 			{
 				case 0:
-					baseCertificateID = IssuerSerial.GetInstance(tagObj, false);
+					baseCertificateID = IssuerSerial.GetInstance(tagObj, true);
 					break;
 				case 1:
-					entityName = GeneralNames.GetInstance(tagObj, false);
+					entityName = GeneralNames.GetInstance(tagObj, true);
 					break;
 				default:
 					throw new ArgumentException("unknown tag in Holder");
@@ -228,7 +228,7 @@ namespace Org.BouncyCastle.Asn1.X509
         {
             if (version == 1)
             {
-                Asn1EncodableVector v = new Asn1EncodableVector();
+                Asn1EncodableVector v = new Asn1EncodableVector(3);
                 v.AddOptionalTagged(false, 0, baseCertificateID);
                 v.AddOptionalTagged(false, 1, entityName);
                 v.AddOptionalTagged(false, 2, objectDigestInfo);
@@ -237,10 +237,10 @@ namespace Org.BouncyCastle.Asn1.X509
 
             if (entityName != null)
             {
-                return new DerTaggedObject(false, 1, entityName);
+                return new DerTaggedObject(true, 1, entityName);
             }
 
-            return new DerTaggedObject(false, 0, baseCertificateID);
+            return new DerTaggedObject(true, 0, baseCertificateID);
         }
 	}
 }