DerPrintableString
using Org.BouncyCastle.Utilities;
using System;
using System.IO;
namespace Org.BouncyCastle.Asn1
{
public class DerPrintableString : DerStringBase
{
internal class Meta : Asn1UniversalType
{
internal static readonly Asn1UniversalType Instance = new Meta();
private Meta()
: base(typeof(DerPrintableString), 19)
{
}
internal override Asn1Object FromImplicitPrimitive(DerOctetString octetString)
{
return CreatePrimitive(octetString.GetOctets());
}
}
private readonly byte[] m_contents;
public static DerPrintableString GetInstance(object obj)
{
if (obj == null)
return null;
DerPrintableString derPrintableString = obj as DerPrintableString;
if (derPrintableString != null)
return derPrintableString;
IAsn1Convertible asn1Convertible = obj as IAsn1Convertible;
if (asn1Convertible != null) {
if (!(obj is Asn1Object)) {
DerPrintableString derPrintableString2 = asn1Convertible.ToAsn1Object() as DerPrintableString;
if (derPrintableString2 != null)
return derPrintableString2;
}
} else {
byte[] array = obj as byte[];
if (array != null)
try {
return (DerPrintableString)Meta.Instance.FromByteArray(array);
} catch (IOException ex) {
throw new ArgumentException("failed to construct printable string from byte[]: " + ex.Message);
}
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
}
public static DerPrintableString GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerPrintableString)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
}
public static DerPrintableString GetOptional(Asn1Encodable element)
{
if (element == null)
throw new ArgumentNullException("element");
DerPrintableString derPrintableString = element as DerPrintableString;
if (derPrintableString != null)
return derPrintableString;
return null;
}
public static DerPrintableString GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerPrintableString)Meta.Instance.GetTagged(taggedObject, declaredExplicit);
}
public DerPrintableString(string str)
: this(str, false)
{
}
public DerPrintableString(string str, bool validate)
{
if (str == null)
throw new ArgumentNullException("str");
if (validate && !IsPrintableString(str))
throw new ArgumentException("string contains illegal characters", "str");
m_contents = Strings.ToAsciiByteArray(str);
}
public DerPrintableString(byte[] contents)
: this(contents, true)
{
}
internal DerPrintableString(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, 19, 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, 19, m_contents);
}
internal sealed override DerEncoding GetEncodingDerImplicit(int tagClass, int tagNo)
{
return new PrimitiveDerEncoding(tagClass, tagNo, m_contents);
}
protected override bool Asn1Equals(Asn1Object asn1Object)
{
DerPrintableString derPrintableString = asn1Object as DerPrintableString;
if (derPrintableString != null)
return Arrays.AreEqual(m_contents, derPrintableString.m_contents);
return false;
}
protected override int Asn1GetHashCode()
{
return Arrays.GetHashCode(m_contents);
}
public static bool IsPrintableString(string str)
{
foreach (char c in str) {
if (c > '')
return false;
if (!char.IsLetterOrDigit(c)) {
switch (c) {
default:
return false;
case ' ':
case '\'':
case '(':
case ')':
case '+':
case ',':
case '-':
case '.':
case '/':
case ':':
case '=':
case '?':
break;
}
}
}
return true;
}
internal static DerPrintableString CreatePrimitive(byte[] contents)
{
return new DerPrintableString(contents, false);
}
}
}