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using System;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1
{
public class DerVideotexString
: DerStringBase
{
private readonly byte[] mString;
/**
* return a Videotex String from the passed in object
*
* @param obj a DERVideotexString or an object that can be converted into one.
* @exception IllegalArgumentException if the object cannot be converted.
* @return a DERVideotexString instance, or null.
*/
public static DerVideotexString GetInstance(object obj)
{
if (obj == null || obj is DerVideotexString)
{
return (DerVideotexString)obj;
}
if (obj is byte[])
{
try
{
return (DerVideotexString)FromByteArray((byte[])obj);
}
catch (Exception e)
{
throw new ArgumentException("encoding error in GetInstance: " + e.ToString(), "obj");
}
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj), "obj");
}
/**
* return a Videotex String from a tagged object.
*
* @param obj the tagged object holding the object we want
* @param explicit true if the object is meant to be explicitly
* tagged false otherwise.
* @exception IllegalArgumentException if the tagged object cannot
* be converted.
* @return a DERVideotexString instance, or null.
*/
public static DerVideotexString GetInstance(Asn1TaggedObject obj, bool isExplicit)
{
Asn1Object o = obj.GetObject();
if (isExplicit || o is DerVideotexString)
{
return GetInstance(o);
}
return new DerVideotexString(((Asn1OctetString)o).GetOctets());
}
/**
* basic constructor - with bytes.
* @param string the byte encoding of the characters making up the string.
*/
public DerVideotexString(byte[] encoding)
{
this.mString = Arrays.Clone(encoding);
}
public override string GetString()
{
return Strings.FromByteArray(mString);
}
public byte[] GetOctets()
{
return Arrays.Clone(mString);
}
internal override bool EncodeConstructed()
{
return false;
}
internal override int EncodedLength(bool withID)
{
return Asn1OutputStream.GetLengthOfEncodingDL(withID, mString.Length);
}
internal override void Encode(Asn1OutputStream asn1Out, bool withID)
{
asn1Out.WriteEncodingDL(withID, Asn1Tags.VideotexString, mString);
}
protected override int Asn1GetHashCode()
{
return Arrays.GetHashCode(mString);
}
protected override bool Asn1Equals(
Asn1Object asn1Object)
{
DerVideotexString other = asn1Object as DerVideotexString;
if (other == null)
return false;
return Arrays.AreEqual(mString, other.mString);
}
}
}
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