332 lines
11 KiB
C#
332 lines
11 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Collections;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1
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{
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public abstract class Asn1Set
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: Asn1Object, IEnumerable<Asn1Encodable>
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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(Asn1Set), Asn1Tags.Set) {}
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internal override Asn1Object FromImplicitConstructed(Asn1Sequence sequence)
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{
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return sequence.ToAsn1Set();
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}
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}
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/**
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* return an ASN1Set from the given object.
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*
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* @param obj the object we want converted.
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* @exception ArgumentException if the object cannot be converted.
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*/
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public static Asn1Set GetInstance(object obj)
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{
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if (obj == null)
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return null;
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if (obj is Asn1Set asn1Set)
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return asn1Set;
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if (obj is IAsn1Convertible asn1Convertible)
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{
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Asn1Object asn1Object = asn1Convertible.ToAsn1Object();
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if (asn1Object is Asn1Set converted)
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return converted;
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}
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else if (obj is byte[] bytes)
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{
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try
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{
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return (Asn1Set)Meta.Instance.FromByteArray(bytes);
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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 set from byte[]: " + e.Message);
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}
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}
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throw new ArgumentException("illegal object in GetInstance: " + Org.BouncyCastle.Utilities.Platform.GetTypeName(obj), "obj");
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}
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/**
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* Return an ASN1 set from a tagged object. There is a special
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* case here, if an object appears to have been explicitly tagged on
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* reading but we were expecting it to be implicitly tagged in the
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* normal course of events it indicates that we lost the surrounding
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* set - so we need to add it back (this will happen if the tagged
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* object is a sequence that contains other sequences). If you are
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* dealing with implicitly tagged sets you really <b>should</b>
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* be using this method.
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*
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* @param taggedObject the tagged object.
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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 Asn1Set GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
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{
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return (Asn1Set)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
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}
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// NOTE: Only non-readonly to support LazyDLSet
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internal Asn1Encodable[] elements;
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internal bool isSorted;
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protected internal Asn1Set()
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{
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this.elements = Asn1EncodableVector.EmptyElements;
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this.isSorted = true;
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}
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protected internal Asn1Set(Asn1Encodable element)
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{
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if (null == element)
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throw new ArgumentNullException("element");
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this.elements = new Asn1Encodable[]{ element };
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this.isSorted = true;
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}
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protected internal Asn1Set(Asn1Encodable[] elements, bool doSort)
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{
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if (Arrays.IsNullOrContainsNull(elements))
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throw new NullReferenceException("'elements' cannot be null, or contain null");
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Asn1Encodable[] tmp = Asn1EncodableVector.CloneElements(elements);
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if (doSort && tmp.Length >= 2)
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{
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tmp = Sort(tmp);
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}
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this.elements = tmp;
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this.isSorted = doSort || tmp.Length < 2;
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}
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protected internal Asn1Set(Asn1EncodableVector elementVector, bool doSort)
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{
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if (null == elementVector)
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throw new ArgumentNullException("elementVector");
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Asn1Encodable[] tmp;
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if (doSort && elementVector.Count >= 2)
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{
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tmp = Sort(elementVector.CopyElements());
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}
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else
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{
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tmp = elementVector.TakeElements();
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}
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this.elements = tmp;
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this.isSorted = doSort || tmp.Length < 2;
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}
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protected internal Asn1Set(bool isSorted, Asn1Encodable[] elements)
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{
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this.elements = elements;
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this.isSorted = isSorted || elements.Length < 2;
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}
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System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
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{
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return GetEnumerator();
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}
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public virtual IEnumerator<Asn1Encodable> GetEnumerator()
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{
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IEnumerable<Asn1Encodable> e = elements;
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return e.GetEnumerator();
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}
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/**
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* return the object at the set position indicated by index.
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*
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* @param index the set number (starting at zero) of the object
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* @return the object at the set position indicated by index.
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*/
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public virtual Asn1Encodable this[int index]
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{
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get { return elements[index]; }
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}
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public virtual int Count
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{
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get { return elements.Length; }
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}
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public virtual T[] MapElements<T>(Func<Asn1Encodable, T> func)
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{
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// NOTE: Call Count here to 'force' a LazyDerSet
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int count = Count;
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T[] result = new T[count];
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for (int i = 0; i < count; ++i)
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{
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result[i] = func(elements[i]);
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}
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return result;
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}
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public virtual Asn1Encodable[] ToArray()
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{
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return Asn1EncodableVector.CloneElements(elements);
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}
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private class Asn1SetParserImpl
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: Asn1SetParser
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{
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private readonly Asn1Set outer;
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private readonly int max;
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private int index;
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public Asn1SetParserImpl(
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Asn1Set outer)
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{
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this.outer = outer;
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// NOTE: Call Count here to 'force' a LazyDerSet
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this.max = outer.Count;
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}
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public IAsn1Convertible ReadObject()
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{
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if (index == max)
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return null;
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Asn1Encodable obj = outer[index++];
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if (obj is Asn1Sequence)
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return ((Asn1Sequence)obj).Parser;
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if (obj is Asn1Set)
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return ((Asn1Set)obj).Parser;
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// NB: Asn1OctetString implements Asn1OctetStringParser directly
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// if (obj is Asn1OctetString)
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// return ((Asn1OctetString)obj).Parser;
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return obj;
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}
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public virtual Asn1Object ToAsn1Object()
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{
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return outer;
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}
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}
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public Asn1SetParser Parser
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{
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get { return new Asn1SetParserImpl(this); }
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}
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protected override int Asn1GetHashCode()
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{
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// NOTE: Call Count here to 'force' a LazyDerSet
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int i = Count;
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int hc = i + 1;
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while (--i >= 0)
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{
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hc *= 257;
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hc ^= elements[i].ToAsn1Object().CallAsn1GetHashCode();
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}
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return hc;
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}
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protected override bool Asn1Equals(Asn1Object asn1Object)
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{
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Asn1Set that = asn1Object as Asn1Set;
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if (null == that)
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return false;
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// NOTE: Call Count here (on both) to 'force' a LazyDerSet
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int count = this.Count;
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if (that.Count != count)
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return false;
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for (int i = 0; i < count; ++i)
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{
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Asn1Object o1 = this.elements[i].ToAsn1Object();
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Asn1Object o2 = that.elements[i].ToAsn1Object();
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if (!o1.Equals(o2))
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return false;
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}
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return true;
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}
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public override string ToString()
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{
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return CollectionUtilities.ToString(elements);
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}
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internal static Asn1Encodable[] Sort(Asn1Encodable[] elements)
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{
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int count = elements.Length;
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if (count < 2)
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return elements;
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byte[][] keys = new byte[count][];
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for (int i = 0; i < count; ++i)
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{
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keys[i] = elements[i].GetEncoded(Der);
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}
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Array.Sort(keys, elements, new DerComparer());
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return elements;
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}
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private class DerComparer
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: IComparer<byte[]>
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{
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public int Compare(byte[] a, byte[] b)
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{
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Debug.Assert(a.Length >= 2 && b.Length >= 2);
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/*
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* NOTE: Set elements in DER encodings are ordered first according to their tags (class and
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* number); the CONSTRUCTED bit is not part of the tag.
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*
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* For SET-OF, this is unimportant. All elements have the same tag and DER requires them to
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* either all be in constructed form or all in primitive form, according to that tag. The
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* elements are effectively ordered according to their content octets.
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*
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* For SET, the elements will have distinct tags, and each will be in constructed or
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* primitive form accordingly. Failing to ignore the CONSTRUCTED bit could therefore lead to
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* ordering inversions.
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*/
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int a0 = a[0] & ~Asn1Tags.Constructed;
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int b0 = b[0] & ~Asn1Tags.Constructed;
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if (a0 != b0)
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return a0 < b0 ? -1 : 1;
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#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || _UNITY_2021_2_OR_NEWER_
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int compareLength = System.Math.Min(a.Length, b.Length) - 1;
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return a.AsSpan(1, compareLength).SequenceCompareTo(b.AsSpan(1, compareLength));
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#else
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int len = System.Math.Min(a.Length, b.Length);
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for (int i = 1; i < len; ++i)
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{
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byte ai = a[i], bi = b[i];
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if (ai != bi)
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return ai < bi ? -1 : 1;
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}
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Debug.Assert(a.Length == b.Length);
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return 0;
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#endif
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}
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}
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}
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}
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#pragma warning restore
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#endif
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