DerNumericString
using Org.BouncyCastle.Utilities;
using System;
using System.IO;
namespace Org.BouncyCastle.Asn1
{
public class DerNumericString : DerStringBase
{
internal class Meta : Asn1UniversalType
{
internal static readonly Asn1UniversalType Instance = new Meta();
private Meta()
: base(typeof(DerNumericString), 18)
{
}
internal override Asn1Object FromImplicitPrimitive(DerOctetString octetString)
{
return CreatePrimitive(octetString.GetOctets());
}
}
private readonly byte[] m_contents;
public static DerNumericString GetInstance(object obj)
{
if (obj == null)
return null;
DerNumericString derNumericString = obj as DerNumericString;
if (derNumericString != null)
return derNumericString;
IAsn1Convertible asn1Convertible = obj as IAsn1Convertible;
if (asn1Convertible != null) {
DerNumericString derNumericString2 = asn1Convertible.ToAsn1Object() as DerNumericString;
if (derNumericString2 != null)
return derNumericString2;
} else {
byte[] array = obj as byte[];
if (array != null)
try {
return (DerNumericString)Meta.Instance.FromByteArray(array);
} catch (IOException ex) {
throw new ArgumentException("failed to construct numeric string from byte[]: " + ex.Message);
}
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
}
public static DerNumericString GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerNumericString)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
}
public DerNumericString(string str)
: this(str, false)
{
}
public DerNumericString(string str, bool validate)
{
if (str == null)
throw new ArgumentNullException("str");
if (validate && !IsNumericString(str))
throw new ArgumentException("string contains illegal characters", "str");
m_contents = Strings.ToAsciiByteArray(str);
}
public DerNumericString(byte[] contents)
: this(contents, true)
{
}
internal DerNumericString(byte[] contents, bool clone)
{
if (contents == null)
throw new ArgumentNullException("contents");
m_contents = (clone ? Arrays.Clone(contents) : contents);
}
public override string GetString()
{
return Strings.FromAsciiByteArray(m_contents);
}
public byte[] GetOctets()
{
return Arrays.Clone(m_contents);
}
internal override IAsn1Encoding GetEncoding(int encoding)
{
return new PrimitiveEncoding(0, 18, 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, 18, m_contents);
}
internal sealed override DerEncoding GetEncodingDerImplicit(int tagClass, int tagNo)
{
return new PrimitiveDerEncoding(tagClass, tagNo, m_contents);
}
protected override bool Asn1Equals(Asn1Object asn1Object)
{
DerNumericString derNumericString = asn1Object as DerNumericString;
if (derNumericString != null)
return Arrays.AreEqual(m_contents, derNumericString.m_contents);
return false;
}
protected override int Asn1GetHashCode()
{
return Arrays.GetHashCode(m_contents);
}
public static bool IsNumericString(string str)
{
foreach (char c in str) {
if (c > '' || (c != ' ' && !char.IsDigit(c)))
return false;
}
return true;
}
internal static bool IsNumericString(byte[] contents)
{
foreach (byte b in contents) {
if (b != 32 && (uint)(b - 48) > 9)
return false;
}
return true;
}
internal static DerNumericString CreatePrimitive(byte[] contents)
{
return new DerNumericString(contents, false);
}
}
}