DerUniversalString
using Org.BouncyCastle.Utilities;
using System;
using System.IO;
using System.Text;
namespace Org.BouncyCastle.Asn1
{
public class DerUniversalString : DerStringBase
{
internal class Meta : Asn1UniversalType
{
internal static readonly Asn1UniversalType Instance = new Meta();
private Meta()
: base(typeof(DerUniversalString), 28)
{
}
internal override Asn1Object FromImplicitPrimitive(DerOctetString octetString)
{
return CreatePrimitive(octetString.GetOctets());
}
}
private static readonly char[] table = new char[16] {
'0',
'1',
'2',
'3',
'4',
'5',
'6',
'7',
'8',
'9',
'A',
'B',
'C',
'D',
'E',
'F'
};
private readonly byte[] m_contents;
public static DerUniversalString GetInstance(object obj)
{
if (obj == null)
return null;
DerUniversalString derUniversalString = obj as DerUniversalString;
if (derUniversalString != null)
return derUniversalString;
IAsn1Convertible asn1Convertible = obj as IAsn1Convertible;
if (asn1Convertible != null) {
if (!(obj is Asn1Object)) {
DerUniversalString derUniversalString2 = asn1Convertible.ToAsn1Object() as DerUniversalString;
if (derUniversalString2 != null)
return derUniversalString2;
}
} else {
byte[] array = obj as byte[];
if (array != null)
try {
return (DerUniversalString)Meta.Instance.FromByteArray(array);
} catch (IOException ex) {
throw new ArgumentException("failed to construct universal string from byte[]: " + ex.Message);
}
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
}
public static DerUniversalString GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerUniversalString)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
}
public static DerUniversalString GetOptional(Asn1Encodable element)
{
if (element == null)
throw new ArgumentNullException("element");
DerUniversalString derUniversalString = element as DerUniversalString;
if (derUniversalString != null)
return derUniversalString;
return null;
}
public static DerUniversalString GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerUniversalString)Meta.Instance.GetTagged(taggedObject, declaredExplicit);
}
public DerUniversalString(byte[] contents)
: this(contents, true)
{
}
internal DerUniversalString(byte[] contents, bool clone)
{
if (contents == null)
throw new ArgumentNullException("contents");
m_contents = (clone ? Arrays.Clone(contents) : contents);
}
public override string GetString()
{
int num = m_contents.Length;
int capacity = 3 + 2 * (Asn1OutputStream.GetLengthOfDL(num) + num);
StringBuilder stringBuilder = new StringBuilder("#1C", capacity);
EncodeHexDL(stringBuilder, num);
for (int i = 0; i < num; i++) {
EncodeHexByte(stringBuilder, m_contents[i]);
}
return stringBuilder.ToString();
}
public byte[] GetOctets()
{
return Arrays.Clone(m_contents);
}
internal override IAsn1Encoding GetEncoding(int encoding)
{
return new PrimitiveEncoding(0, 28, m_contents);
}
internal override IAsn1Encoding GetEncodingImplicit(int encoding, int tagClass, int tagNo)
{
return new PrimitiveEncoding(tagClass, tagNo, m_contents);
}
internal sealed override DerEncoding GetEncodingDer()
{
return new PrimitiveDerEncoding(0, 28, m_contents);
}
internal sealed override DerEncoding GetEncodingDerImplicit(int tagClass, int tagNo)
{
return new PrimitiveDerEncoding(tagClass, tagNo, m_contents);
}
protected override bool Asn1Equals(Asn1Object asn1Object)
{
DerUniversalString derUniversalString = asn1Object as DerUniversalString;
if (derUniversalString != null)
return Arrays.AreEqual(m_contents, derUniversalString.m_contents);
return false;
}
protected override int Asn1GetHashCode()
{
return Arrays.GetHashCode(m_contents);
}
internal static DerUniversalString CreatePrimitive(byte[] contents)
{
return new DerUniversalString(contents, false);
}
private static void EncodeHexByte(StringBuilder buf, int i)
{
buf.Append(table[(i >> 4) & 15]);
buf.Append(table[i & 15]);
}
private static void EncodeHexDL(StringBuilder buf, int dl)
{
if (dl < 128)
EncodeHexByte(buf, dl);
else {
byte[] array = new byte[5];
int num = 5;
do {
array[--num] = (byte)dl;
dl >>= 8;
} while (dl != 0);
int num2 = array.Length - num;
array[--num] = (byte)(128 | num2);
do {
EncodeHexByte(buf, array[num++]);
} while (num < array.Length);
}
}
}
}