377 lines
11 KiB
C#
377 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;
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using System.IO;
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#if PORTABLE || NETFX_CORE
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using System.Collections.Generic;
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using System.Linq;
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#endif
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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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abstract public class Asn1Set
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: Asn1Object, IEnumerable
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{
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private readonly IList _set;
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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(
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object obj)
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{
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if (obj == null || obj is Asn1Set)
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{
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return (Asn1Set)obj;
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}
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else if (obj is Asn1SetParser)
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{
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return Asn1Set.GetInstance(((Asn1SetParser)obj).ToAsn1Object());
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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 Asn1Set.GetInstance(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 set from byte[]: " + e.Message);
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}
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}
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else if (obj is Asn1Encodable)
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{
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Asn1Object primitive = ((Asn1Encodable)obj).ToAsn1Object();
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if (primitive is Asn1Set)
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{
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return (Asn1Set)primitive;
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}
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}
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throw new ArgumentException("Unknown object in GetInstance: " + BestHTTP.SecureProtocol.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 obj the tagged object.
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* @param explicitly true if the object is meant to be explicitly tagged
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* false otherwise.
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* @exception ArgumentException if the tagged object cannot
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* be converted.
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*/
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public static Asn1Set GetInstance(
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Asn1TaggedObject obj,
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bool explicitly)
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{
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Asn1Object inner = obj.GetObject();
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if (explicitly)
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{
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if (!obj.IsExplicit())
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throw new ArgumentException("object implicit - explicit expected.");
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return (Asn1Set) inner;
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}
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//
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// constructed object which appears to be explicitly tagged
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// and it's really implicit means we have to add the
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// surrounding sequence.
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//
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if (obj.IsExplicit())
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{
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return new DerSet(inner);
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}
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if (inner is Asn1Set)
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{
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return (Asn1Set) inner;
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}
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//
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// in this case the parser returns a sequence, convert it
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// into a set.
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//
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if (inner is Asn1Sequence)
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{
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Asn1EncodableVector v = new Asn1EncodableVector();
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Asn1Sequence s = (Asn1Sequence) inner;
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foreach (Asn1Encodable ae in s)
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{
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v.Add(ae);
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}
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// TODO Should be able to construct set directly from sequence?
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return new DerSet(v, false);
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}
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throw new ArgumentException("Unknown object in GetInstance: " + BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.GetTypeName(obj), "obj");
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}
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protected internal Asn1Set(
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int capacity)
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{
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_set = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateArrayList(capacity);
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}
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public virtual IEnumerator GetEnumerator()
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{
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return _set.GetEnumerator();
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}
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[Obsolete("Use GetEnumerator() instead")]
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public IEnumerator GetObjects()
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{
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return 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 (Asn1Encodable) _set[index]; }
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}
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[Obsolete("Use 'object[index]' syntax instead")]
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public Asn1Encodable GetObjectAt(
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int index)
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{
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return this[index];
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}
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[Obsolete("Use 'Count' property instead")]
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public int Size
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{
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get { return Count; }
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}
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public virtual int Count
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{
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get { return _set.Count; }
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}
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public virtual Asn1Encodable[] ToArray()
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{
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Asn1Encodable[] values = new Asn1Encodable[this.Count];
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for (int i = 0; i < this.Count; ++i)
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{
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values[i] = this[i];
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}
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return values;
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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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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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int hc = Count;
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foreach (object o in this)
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{
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hc *= 17;
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if (o == null)
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{
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hc ^= DerNull.Instance.GetHashCode();
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}
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else
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{
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hc ^= o.GetHashCode();
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}
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}
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return hc;
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}
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protected override bool Asn1Equals(
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Asn1Object asn1Object)
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{
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Asn1Set other = asn1Object as Asn1Set;
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if (other == null)
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return false;
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if (Count != other.Count)
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{
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return false;
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}
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IEnumerator s1 = GetEnumerator();
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IEnumerator s2 = other.GetEnumerator();
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while (s1.MoveNext() && s2.MoveNext())
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{
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Asn1Object o1 = GetCurrent(s1).ToAsn1Object();
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Asn1Object o2 = GetCurrent(s2).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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private Asn1Encodable GetCurrent(IEnumerator e)
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{
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Asn1Encodable encObj = (Asn1Encodable)e.Current;
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// unfortunately null was allowed as a substitute for DER null
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if (encObj == null)
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return DerNull.Instance;
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return encObj;
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}
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protected internal void Sort()
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{
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if (_set.Count < 2)
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return;
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#if PORTABLE || NETFX_CORE
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var sorted = _set.Cast<Asn1Encodable>()
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.Select(a => new { Item = a, Key = a.GetEncoded(Asn1Encodable.Der) })
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.OrderBy(t => t.Key, new DerComparer())
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.Select(t => t.Item)
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.ToList();
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for (int i = 0; i < _set.Count; ++i)
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{
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_set[i] = sorted[i];
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}
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#else
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Asn1Encodable[] items = new Asn1Encodable[_set.Count];
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byte[][] keys = new byte[_set.Count][];
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for (int i = 0; i < _set.Count; ++i)
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{
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Asn1Encodable item = (Asn1Encodable)_set[i];
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items[i] = item;
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keys[i] = item.GetEncoded(Asn1Encodable.Der);
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}
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Array.Sort(keys, items, new DerComparer());
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for (int i = 0; i < _set.Count; ++i)
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{
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_set[i] = items[i];
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}
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#endif
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}
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protected internal void AddObject(Asn1Encodable obj)
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{
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_set.Add(obj);
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}
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public override string ToString()
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{
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return CollectionUtilities.ToString(_set);
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}
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#if PORTABLE || NETFX_CORE
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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[] x, byte[] y)
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{
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byte[] a = x, b = y;
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#else
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private class DerComparer
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: IComparer
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{
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public int Compare(object x, object y)
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{
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byte[] a = (byte[])x, b = (byte[])y;
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#endif
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int len = System.Math.Min(a.Length, b.Length);
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for (int i = 0; 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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if (a.Length > b.Length)
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return AllZeroesFrom(a, len) ? 0 : 1;
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if (a.Length < b.Length)
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return AllZeroesFrom(b, len) ? 0 : -1;
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return 0;
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}
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private bool AllZeroesFrom(byte[] bs, int pos)
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{
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while (pos < bs.Length)
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{
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if (bs[pos++] != 0)
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return false;
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}
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return true;
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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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