kopia lustrzana https://github.com/dl2alf/AirScout
123 wiersze
3.7 KiB
C#
123 wiersze
3.7 KiB
C#
using System;
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using System.IO;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Asn1
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{
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/**
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* Der UTF8String object.
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*/
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public class DerUtf8String
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: DerStringBase
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{
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internal class Meta : Asn1UniversalType
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{
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internal static readonly Asn1UniversalType Instance = new Meta();
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private Meta() : base(typeof(DerUtf8String), Asn1Tags.Utf8String) {}
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internal override Asn1Object FromImplicitPrimitive(DerOctetString octetString)
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{
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return CreatePrimitive(octetString.GetOctets());
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}
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}
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/**
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* return an UTF8 string from the passed in object.
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*
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* @exception ArgumentException if the object cannot be converted.
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*/
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public static DerUtf8String GetInstance(object obj)
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{
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if (obj == null || obj is DerUtf8String)
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{
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return (DerUtf8String)obj;
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}
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else if (obj is IAsn1Convertible)
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{
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Asn1Object asn1Object = ((IAsn1Convertible)obj).ToAsn1Object();
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if (asn1Object is DerUtf8String)
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return (DerUtf8String)asn1Object;
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}
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else if (obj is byte[])
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{
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try
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{
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return (DerUtf8String)Meta.Instance.FromByteArray((byte[])obj);
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}
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catch (IOException e)
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{
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throw new ArgumentException("failed to construct UTF8 string from byte[]: " + e.Message);
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}
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}
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throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
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}
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/**
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* return a UTF8 string from a tagged object.
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*
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* @param taggedObject the tagged object holding the object we want
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* @param declaredExplicit true if the object is meant to be explicitly tagged false otherwise.
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* @exception ArgumentException if the tagged object cannot be converted.
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*/
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public static DerUtf8String GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
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{
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return (DerUtf8String)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
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}
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private readonly byte[] m_contents;
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public DerUtf8String(string str)
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: this(Strings.ToUtf8ByteArray(str), false)
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{
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}
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public DerUtf8String(byte[] contents)
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: this(contents, true)
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{
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}
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internal DerUtf8String(byte[] contents, bool clone)
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{
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if (null == contents)
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throw new ArgumentNullException("contents");
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m_contents = clone ? Arrays.Clone(contents) : contents;
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}
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public override string GetString()
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{
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return Strings.FromUtf8ByteArray(m_contents);
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}
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protected override bool Asn1Equals(Asn1Object asn1Object)
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{
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DerUtf8String that = asn1Object as DerUtf8String;
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return null != that
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&& Arrays.AreEqual(this.m_contents, that.m_contents);
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}
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protected override int Asn1GetHashCode()
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{
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return Arrays.GetHashCode(m_contents);
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}
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internal override IAsn1Encoding GetEncoding(int encoding)
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{
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return new PrimitiveEncoding(Asn1Tags.Universal, Asn1Tags.Utf8String, m_contents);
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}
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internal override IAsn1Encoding GetEncodingImplicit(int encoding, int tagClass, int tagNo)
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{
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return new PrimitiveEncoding(tagClass, tagNo, m_contents);
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}
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internal static DerUtf8String CreatePrimitive(byte[] contents)
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{
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return new DerUtf8String(contents, false);
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}
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}
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}
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