DerBmpString
using Org.BouncyCastle.Utilities;
using System;
using System.IO;
namespace Org.BouncyCastle.Asn1
{
public class DerBmpString : DerStringBase
{
internal class Meta : Asn1UniversalType
{
internal static readonly Asn1UniversalType Instance = new Meta();
private Meta()
: base(typeof(DerBmpString), 30)
{
}
internal override Asn1Object FromImplicitPrimitive(DerOctetString octetString)
{
return CreatePrimitive(octetString.GetOctets());
}
}
private readonly string m_str;
public static DerBmpString GetInstance(object obj)
{
if (obj == null)
return null;
DerBmpString derBmpString = obj as DerBmpString;
if (derBmpString != null)
return derBmpString;
IAsn1Convertible asn1Convertible = obj as IAsn1Convertible;
if (asn1Convertible != null) {
DerBmpString derBmpString2 = asn1Convertible.ToAsn1Object() as DerBmpString;
if (derBmpString2 != null)
return derBmpString2;
} else {
byte[] array = obj as byte[];
if (array != null)
try {
return (DerBmpString)Meta.Instance.FromByteArray(array);
} catch (IOException ex) {
throw new ArgumentException("failed to construct BMP string from byte[]: " + ex.Message);
}
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
}
public static DerBmpString GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerBmpString)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
}
internal DerBmpString(byte[] contents)
{
if (contents == null)
throw new ArgumentNullException("contents");
int num = contents.Length;
if ((num & 1) != 0)
throw new ArgumentException("malformed BMPString encoding encountered", "contents");
int num2 = num / 2;
char[] array = new char[num2];
for (int i = 0; i != num2; i++) {
array[i] = (char)((contents[2 * i] << 8) | (contents[2 * i + 1] & 255));
}
m_str = new string(array);
}
internal DerBmpString(char[] str)
{
if (str == null)
throw new ArgumentNullException("str");
m_str = new string(str);
}
public DerBmpString(string str)
{
if (str == null)
throw new ArgumentNullException("str");
m_str = str;
}
public override string GetString()
{
return m_str;
}
protected override bool Asn1Equals(Asn1Object asn1Object)
{
DerBmpString derBmpString = asn1Object as DerBmpString;
if (derBmpString != null)
return m_str.Equals(derBmpString.m_str);
return false;
}
protected override int Asn1GetHashCode()
{
return m_str.GetHashCode();
}
internal override IAsn1Encoding GetEncoding(int encoding)
{
return new PrimitiveEncoding(0, 30, GetContents());
}
internal override IAsn1Encoding GetEncodingImplicit(int encoding, int tagClass, int tagNo)
{
return new PrimitiveEncoding(tagClass, tagNo, GetContents());
}
internal sealed override DerEncoding GetEncodingDer()
{
return new PrimitiveDerEncoding(0, 30, GetContents());
}
internal sealed override DerEncoding GetEncodingDerImplicit(int tagClass, int tagNo)
{
return new PrimitiveDerEncoding(tagClass, tagNo, GetContents());
}
private byte[] GetContents()
{
char[] array = m_str.ToCharArray();
byte[] array2 = new byte[array.Length * 2];
for (int i = 0; i != array.Length; i++) {
array2[2 * i] = (byte)((int)array[i] >> 8);
array2[2 * i + 1] = (byte)array[i];
}
return array2;
}
internal static DerBmpString CreatePrimitive(byte[] contents)
{
return new DerBmpString(contents);
}
internal static DerBmpString CreatePrimitive(char[] str)
{
return new DerBmpString(str);
}
}
}