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using System;
using System.IO;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1
{
/**
* VisibleString object.
*/
public class DerVisibleString
: DerStringBase
{
internal class Meta : Asn1UniversalType
{
internal static readonly Asn1UniversalType Instance = new Meta();
private Meta() : base(typeof(DerVisibleString), Asn1Tags.VisibleString) {}
internal override Asn1Object FromImplicitPrimitive(DerOctetString octetString)
{
return CreatePrimitive(octetString.GetOctets());
}
}
/**
* return a visible string from the passed in object.
*
* @exception ArgumentException if the object cannot be converted.
*/
public static DerVisibleString GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is DerVisibleString derVisibleString)
return derVisibleString;
if (obj is IAsn1Convertible asn1Convertible)
{
if (!(obj is Asn1Object) && asn1Convertible.ToAsn1Object() is DerVisibleString converted)
return converted;
}
else if (obj is byte[] bytes)
{
try
{
return (DerVisibleString)Meta.Instance.FromByteArray(bytes);
}
catch (IOException e)
{
throw new ArgumentException("failed to construct visible string from byte[]: " + e.Message);
}
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
}
/**
* return a visible string from a tagged object.
*
* @param taggedObject the tagged object holding the object we want
* @param declaredExplicit true if the object is meant to be explicitly tagged false otherwise.
* @exception ArgumentException if the tagged object cannot be converted.
*/
public static DerVisibleString GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerVisibleString)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
}
public static DerVisibleString GetOptional(Asn1Encodable element)
{
if (element == null)
throw new ArgumentNullException(nameof(element));
if (element is DerVisibleString existing)
return existing;
if (element is IAsn1Convertible asn1Convertible && !(element is Asn1Object) &&
asn1Convertible.ToAsn1Object() is DerVisibleString converted)
{
return converted;
}
return null;
}
public static DerVisibleString GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerVisibleString)Meta.Instance.GetTagged(taggedObject, declaredExplicit);
}
private readonly byte[] m_contents;
public DerVisibleString(string str)
{
if (str == null)
throw new ArgumentNullException("str");
m_contents = Strings.ToAsciiByteArray(str);
}
public DerVisibleString(byte[] contents)
: this(contents, true)
{
}
internal DerVisibleString(byte[] contents, bool clone)
{
if (null == contents)
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(Asn1Tags.Universal, Asn1Tags.VisibleString, 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(Asn1Tags.Universal, Asn1Tags.VisibleString, m_contents);
}
internal sealed override DerEncoding GetEncodingDerImplicit(int tagClass, int tagNo)
{
return new PrimitiveDerEncoding(tagClass, tagNo, m_contents);
}
protected override bool Asn1Equals(Asn1Object asn1Object)
{
DerVisibleString that = asn1Object as DerVisibleString;
return null != that
&& Arrays.AreEqual(this.m_contents, that.m_contents);
}
protected override int Asn1GetHashCode()
{
return Arrays.GetHashCode(m_contents);
}
internal static DerVisibleString CreatePrimitive(byte[] contents)
{
return new DerVisibleString(contents, false);
}
}
}
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