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using System;
using System.Text;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1
{
/**
* Der UniversalString object.
*/
public class DerUniversalString
: DerStringBase
{
private static readonly char[] table = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
private readonly byte[] str;
/**
* return a Universal string from the passed in object.
*
* @exception ArgumentException if the object cannot be converted.
*/
public static DerUniversalString GetInstance(
object obj)
{
if (obj == null || obj is DerUniversalString)
{
return (DerUniversalString)obj;
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
}
/**
* return a Universal string from a tagged object.
*
* @param obj the tagged object holding the object we want
* @param explicitly true if the object is meant to be explicitly
* tagged false otherwise.
* @exception ArgumentException if the tagged object cannot
* be converted.
*/
public static DerUniversalString GetInstance(
Asn1TaggedObject obj,
bool isExplicit)
{
Asn1Object o = obj.GetObject();
if (isExplicit || o is DerUniversalString)
{
return GetInstance(o);
}
return new DerUniversalString(Asn1OctetString.GetInstance(o).GetOctets());
}
/**
* basic constructor - byte encoded string.
*/
public DerUniversalString(
byte[] str)
{
if (str == null)
throw new ArgumentNullException("str");
this.str = str;
}
public override string GetString()
{
StringBuilder buffer = new StringBuilder("#");
byte[] enc = GetDerEncoded();
for (int i = 0; i != enc.Length; i++)
{
uint ubyte = enc[i];
buffer.Append(table[(ubyte >> 4) & 0xf]);
buffer.Append(table[enc[i] & 0xf]);
}
return buffer.ToString();
}
public byte[] GetOctets()
{
return (byte[]) str.Clone();
}
internal override void Encode(Asn1OutputStream asn1Out)
{
asn1Out.WriteEncoded(Asn1Tags.UniversalString, this.str);
}
protected override bool Asn1Equals(
Asn1Object asn1Object)
{
DerUniversalString other = asn1Object as DerUniversalString;
if (other == null)
return false;
// return this.GetString().Equals(other.GetString());
return Arrays.AreEqual(this.str, other.str);
}
}
}
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