1 files changed, 161 insertions, 0 deletions
diff --git a/Crypto/src/asn1/x509/IetfAttrSyntax.cs b/Crypto/src/asn1/x509/IetfAttrSyntax.cs
new file mode 100644
index 000000000..e719865b3
--- /dev/null
+++ b/Crypto/src/asn1/x509/IetfAttrSyntax.cs
@@ -0,0 +1,161 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+ /**
+ * Implementation of <code>IetfAttrSyntax</code> as specified by RFC3281.
+ */
+ public class IetfAttrSyntax
+ : Asn1Encodable
+ {
+ public const int ValueOctets = 1;
+ public const int ValueOid = 2;
+ public const int ValueUtf8 = 3;
+
+ internal readonly GeneralNames policyAuthority;
+ internal readonly Asn1EncodableVector values = new Asn1EncodableVector();
+
+ internal int valueChoice = -1;
+
+ /**
+ *
+ */
+ public IetfAttrSyntax(
+ Asn1Sequence seq)
+ {
+ int i = 0;
+
+ if (seq[0] is Asn1TaggedObject)
+ {
+ policyAuthority = GeneralNames.GetInstance(((Asn1TaggedObject)seq[0]), false);
+ i++;
+ }
+ else if (seq.Count == 2)
+ { // VOMS fix
+ policyAuthority = GeneralNames.GetInstance(seq[0]);
+ i++;
+ }
+
+ if (!(seq[i] is Asn1Sequence))
+ {
+ throw new ArgumentException("Non-IetfAttrSyntax encoding");
+ }
+
+ seq = (Asn1Sequence) seq[i];
+
+ foreach (Asn1Object obj in seq)
+ {
+ int type;
+
+ if (obj is DerObjectIdentifier)
+ {
+ type = ValueOid;
+ }
+ else if (obj is DerUtf8String)
+ {
+ type = ValueUtf8;
+ }
+ else if (obj is DerOctetString)
+ {
+ type = ValueOctets;
+ }
+ else
+ {
+ throw new ArgumentException("Bad value type encoding IetfAttrSyntax");
+ }
+
+ if (valueChoice < 0)
+ {
+ valueChoice = type;
+ }
+
+ if (type != valueChoice)
+ {
+ throw new ArgumentException("Mix of value types in IetfAttrSyntax");
+ }
+
+ values.Add(obj);
+ }
+ }
+
+ public GeneralNames PolicyAuthority
+ {
+ get { return policyAuthority; }
+ }
+
+ public int ValueType
+ {
+ get { return valueChoice; }
+ }
+
+ public object[] GetValues()
+ {
+ if (this.ValueType == ValueOctets)
+ {
+ Asn1OctetString[] tmp = new Asn1OctetString[values.Count];
+
+ for (int i = 0; i != tmp.Length; i++)
+ {
+ tmp[i] = (Asn1OctetString) values[i];
+ }
+
+ return tmp;
+ }
+
+ if (this.ValueType == ValueOid)
+ {
+ DerObjectIdentifier[] tmp = new DerObjectIdentifier[values.Count];
+
+ for (int i = 0; i != tmp.Length; i++)
+ {
+ tmp[i] = (DerObjectIdentifier) values[i];
+ }
+
+ return tmp;
+ }
+
+ {
+ DerUtf8String[] tmp = new DerUtf8String[values.Count];
+
+ for (int i = 0; i != tmp.Length; i++)
+ {
+ tmp[i] = (DerUtf8String) values[i];
+ }
+
+ return tmp;
+ }
+ }
+
+ /**
+ *
+ * <pre>
+ *
+ * IetfAttrSyntax ::= Sequence {
+ * policyAuthority [0] GeneralNames OPTIONAL,
+ * values Sequence OF CHOICE {
+ * octets OCTET STRING,
+ * oid OBJECT IDENTIFIER,
+ * string UTF8String
+ * }
+ * }
+ *
+ * </pre>
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector();
+
+ if (policyAuthority != null)
+ {
+ v.Add(new DerTaggedObject(0, policyAuthority));
+ }
+
+ v.Add(new DerSequence(values));
+
+ return new DerSequence(v);
+ }
+ }
+}
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