#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
using System.Collections;
using System.Diagnostics;
using System.IO;
#if PORTABLE || NETFX_CORE
using System.Collections.Generic;
using System.Linq;
#endif
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Collections;
namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1
{
abstract public class Asn1Set
: Asn1Object, IEnumerable
{
// NOTE: Only non-readonly to support LazyDerSet
internal Asn1Encodable[] elements;
/**
* return an ASN1Set from the given object.
*
* @param obj the object we want converted.
* @exception ArgumentException if the object cannot be converted.
*/
public static Asn1Set GetInstance(
object obj)
{
if (obj == null || obj is Asn1Set)
{
return (Asn1Set)obj;
}
else if (obj is Asn1SetParser)
{
return Asn1Set.GetInstance(((Asn1SetParser)obj).ToAsn1Object());
}
else if (obj is byte[])
{
try
{
return Asn1Set.GetInstance(FromByteArray((byte[])obj));
}
catch (IOException e)
{
throw new ArgumentException("failed to construct set from byte[]: " + e.Message);
}
}
else if (obj is Asn1Encodable)
{
Asn1Object primitive = ((Asn1Encodable)obj).ToAsn1Object();
if (primitive is Asn1Set)
{
return (Asn1Set)primitive;
}
}
throw new ArgumentException("Unknown object in GetInstance: " + BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.GetTypeName(obj), "obj");
}
/**
* Return an ASN1 set from a tagged object. There is a special
* case here, if an object appears to have been explicitly tagged on
* reading but we were expecting it to be implicitly tagged in the
* normal course of events it indicates that we lost the surrounding
* set - so we need to add it back (this will happen if the tagged
* object is a sequence that contains other sequences). If you are
* dealing with implicitly tagged sets you really <b>should</b>
* be using this method.
*
* @param obj the tagged object.
* @param explicitly true if the object is meant to be explicitly tagged
* false otherwise.
* @exception ArgumentException if the tagged object cannot
* be converted.
*/
public static Asn1Set GetInstance(
Asn1TaggedObject obj,
bool explicitly)
{
Asn1Object inner = obj.GetObject();
if (explicitly)
{
if (!obj.IsExplicit())
throw new ArgumentException("object implicit - explicit expected.");
return (Asn1Set) inner;
}
//
// constructed object which appears to be explicitly tagged
// and it's really implicit means we have to add the
// surrounding sequence.
//
if (obj.IsExplicit())
{
return new DerSet(inner);
}
if (inner is Asn1Set)
{
return (Asn1Set) inner;
}
//
// in this case the parser returns a sequence, convert it
// into a set.
//
if (inner is Asn1Sequence)
{
Asn1EncodableVector v = new Asn1EncodableVector();
Asn1Sequence s = (Asn1Sequence) inner;
foreach (Asn1Encodable ae in s)
{
v.Add(ae);
}
// TODO Should be able to construct set directly from sequence?
return new DerSet(v, false);
}
throw new ArgumentException("Unknown object in GetInstance: " + BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.GetTypeName(obj), "obj");
}
protected internal Asn1Set()
{
this.elements = Asn1EncodableVector.EmptyElements;
}
protected internal Asn1Set(Asn1Encodable element)
{
if (null == element)
throw new ArgumentNullException("element");
this.elements = new Asn1Encodable[]{ element };
}
protected internal Asn1Set(params Asn1Encodable[] elements)
{
if (Arrays.IsNullOrContainsNull(elements))
throw new NullReferenceException("'elements' cannot be null, or contain null");
this.elements = Asn1EncodableVector.CloneElements(elements);
}
protected internal Asn1Set(Asn1EncodableVector elementVector)
{
if (null == elementVector)
throw new ArgumentNullException("elementVector");
this.elements = elementVector.TakeElements();
}
public virtual IEnumerator GetEnumerator()
{
return elements.GetEnumerator();
}
/**
* return the object at the set position indicated by index.
*
* @param index the set number (starting at zero) of the object
* @return the object at the set position indicated by index.
*/
public virtual Asn1Encodable this[int index]
{
get { return elements[index]; }
}
public virtual int Count
{
get { return elements.Length; }
}
public virtual Asn1Encodable[] ToArray()
{
return Asn1EncodableVector.CloneElements(elements);
}
private class Asn1SetParserImpl
: Asn1SetParser
{
private readonly Asn1Set outer;
private readonly int max;
private int index;
public Asn1SetParserImpl(
Asn1Set outer)
{
this.outer = outer;
this.max = outer.Count;
}
public IAsn1Convertible ReadObject()
{
if (index == max)
return null;
Asn1Encodable obj = outer[index++];
if (obj is Asn1Sequence)
return ((Asn1Sequence)obj).Parser;
if (obj is Asn1Set)
return ((Asn1Set)obj).Parser;
// NB: Asn1OctetString implements Asn1OctetStringParser directly
// if (obj is Asn1OctetString)
// return ((Asn1OctetString)obj).Parser;
return obj;
}
public virtual Asn1Object ToAsn1Object()
{
return outer;
}
}
public Asn1SetParser Parser
{
get { return new Asn1SetParserImpl(this); }
}
protected override int Asn1GetHashCode()
{
//return Arrays.GetHashCode(elements);
int i = elements.Length;
int hc = i + 1;
while (--i >= 0)
{
hc *= 257;
hc ^= elements[i].ToAsn1Object().CallAsn1GetHashCode();
}
return hc;
}
protected override bool Asn1Equals(Asn1Object asn1Object)
{
Asn1Set that = asn1Object as Asn1Set;
if (null == that)
return false;
int count = this.Count;
if (that.Count != count)
return false;
for (int i = 0; i < count; ++i)
{
Asn1Object o1 = this.elements[i].ToAsn1Object();
Asn1Object o2 = that.elements[i].ToAsn1Object();
if (o1 != o2 && !o1.CallAsn1Equals(o2))
return false;
}
return true;
}
protected internal void Sort()
{
if (elements.Length < 2)
return;
#if PORTABLE || NETFX_CORE
this.elements = elements
.Cast<Asn1Encodable>()
.Select(a => new { Item = a, Key = a.GetEncoded(Asn1Encodable.Der) })
.OrderBy(t => t.Key, new DerComparer())
.Select(t => t.Item)
.ToArray();
#else
int count = elements.Length;
byte[][] keys = new byte[count][];
for (int i = 0; i < count; ++i)
{
keys[i] = elements[i].GetEncoded(Asn1Encodable.Der);
}
Array.Sort(keys, elements, new DerComparer());
#endif
}
public override string ToString()
{
return CollectionUtilities.ToString(elements);
}
#if PORTABLE || NETFX_CORE
private class DerComparer
: IComparer<byte[]>
{
public int Compare(byte[] x, byte[] y)
{
byte[] a = x, b = y;
#else
private class DerComparer
: IComparer
{
public int Compare(object x, object y)
{
byte[] a = (byte[])x, b = (byte[])y;
#endif
Debug.Assert(a.Length >= 2 && b.Length >= 2);
/*
* NOTE: Set elements in DER encodings are ordered first according to their tags (class and
* number); the CONSTRUCTED bit is not part of the tag.
*
* For SET-OF, this is unimportant. All elements have the same tag and DER requires them to
* either all be in constructed form or all in primitive form, according to that tag. The
* elements are effectively ordered according to their content octets.
*
* For SET, the elements will have distinct tags, and each will be in constructed or
* primitive form accordingly. Failing to ignore the CONSTRUCTED bit could therefore lead to
* ordering inversions.
*/
int a0 = a[0] & ~Asn1Tags.Constructed;
int b0 = b[0] & ~Asn1Tags.Constructed;
if (a0 != b0)
return a0 < b0 ? -1 : 1;
int len = System.Math.Min(a.Length, b.Length);
for (int i = 1; i < len; ++i)
{
byte ai = a[i], bi = b[i];
if (ai != bi)
return ai < bi ? -1 : 1;
}
Debug.Assert(a.Length == b.Length);
return 0;
}
}
}
}
#pragma warning restore
#endif
