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using System;
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();
v.AddOptionalTagged(true, 0, policyAuthority);
v.Add(new DerSequence(values));
return new DerSequence(v);
}
}
}
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