/**
* return an Attribute object from the given object.
*
* @param o the object we want converted.
* @exception ArgumentException if the object cannot be converted.
*/
public static AttributePkcs GetInstance(
object obj)
{
AttributePkcs attr = obj as AttributePkcs;
if (obj == null || attr != null)
{
return(attr);
}
Asn1Sequence seq = obj as Asn1Sequence;
if (seq != null)
{
return(new AttributePkcs(seq));
}
throw new ArgumentException("Unknown object in factory: " + BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.GetTypeName(obj), "obj");
}
private static void ValidateAttributes(Asn1Set attributes)
{
if (attributes == null)
{
return;
}
foreach (Asn1Encodable ae in attributes)
{
Asn1Object obj = ae.ToAsn1Object();
AttributePkcs attr = AttributePkcs.GetInstance(obj);
if (attr.AttrType.Equals(PkcsObjectIdentifiers.Pkcs9AtChallengePassword))
{
if (attr.AttrValues.Count != 1)
{
throw new ArgumentException("challengePassword attribute must have one value");
}
}
}
}