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using System;
using System.Text;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1
{
/**
* Der VisibleString object.
*/
public class DerVisibleString
: DerStringBase
{
private readonly string str;
/**
* return a Visible string from the passed in object.
*
* @exception ArgumentException if the object cannot be converted.
*/
public static DerVisibleString GetInstance(
object obj)
{
if (obj == null || obj is DerVisibleString)
{
return (DerVisibleString)obj;
}
if (obj is Asn1OctetString)
{
return new DerVisibleString(((Asn1OctetString)obj).GetOctets());
}
if (obj is Asn1TaggedObject)
{
return GetInstance(((Asn1TaggedObject)obj).GetObject());
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
}
/**
* return a Visible 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 DerVisibleString GetInstance(
Asn1TaggedObject obj,
bool explicitly)
{
return GetInstance(obj.GetObject());
}
/**
* basic constructor - byte encoded string.
*/
public DerVisibleString(
byte[] str)
: this(Strings.FromAsciiByteArray(str))
{
}
/**
* basic constructor
*/
public DerVisibleString(
string str)
{
if (str == null)
throw new ArgumentNullException("str");
this.str = str;
}
public override string GetString()
{
return str;
}
public byte[] GetOctets()
{
return Strings.ToAsciiByteArray(str);
}
internal override bool EncodeConstructed(int encoding)
{
return false;
}
internal override int EncodedLength(int encoding, bool withID)
{
return Asn1OutputStream.GetLengthOfEncodingDL(withID, str.Length);
}
internal override void Encode(Asn1OutputStream asn1Out, bool withID)
{
asn1Out.WriteEncodingDL(withID, Asn1Tags.VisibleString, GetOctets());
}
protected override bool Asn1Equals(
Asn1Object asn1Object)
{
DerVisibleString other = asn1Object as DerVisibleString;
if (other == null)
return false;
return this.str.Equals(other.str);
}
protected override int Asn1GetHashCode()
{
return this.str.GetHashCode();
}
}
}
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