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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/asn1/Asn1Set.cs

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+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities.Collections;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1
+{
+    public abstract class Asn1Set
+        : Asn1Object, IEnumerable<Asn1Encodable>
+    {
+        internal class Meta : Asn1UniversalType
+        {
+            internal static readonly Asn1UniversalType Instance = new Meta();
+
+            private Meta() : base(typeof(Asn1Set), Asn1Tags.Set) {}
+
+            internal override Asn1Object FromImplicitConstructed(Asn1Sequence sequence)
+            {
+                return sequence.ToAsn1Set();
+            }
+        }
+
+        /**
+         * 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)
+                return null;
+
+            if (obj is Asn1Set asn1Set)
+                return asn1Set;
+
+            if (obj is IAsn1Convertible asn1Convertible)
+            {
+                Asn1Object asn1Object = asn1Convertible.ToAsn1Object();
+                if (asn1Object is Asn1Set converted)
+                    return converted;
+            }
+            else if (obj is byte[] bytes)
+            {
+                try
+                {
+                    return (Asn1Set)Meta.Instance.FromByteArray(bytes);
+                }
+                catch (IOException e)
+                {
+                    throw new ArgumentException("failed to construct set from byte[]: " + e.Message);
+                }
+            }
+
+            throw new ArgumentException("illegal object in GetInstance: " + 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 taggedObject the tagged object.
+         * @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 Asn1Set GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
+        {
+            return (Asn1Set)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
+        }
+
+        // NOTE: Only non-readonly to support LazyDLSet
+        internal Asn1Encodable[] elements;
+        internal bool isSorted;
+
+        protected internal Asn1Set()
+        {
+            this.elements = Asn1EncodableVector.EmptyElements;
+            this.isSorted = true;
+        }
+
+        protected internal Asn1Set(Asn1Encodable element)
+        {
+            if (null == element)
+                throw new ArgumentNullException("element");
+
+            this.elements = new Asn1Encodable[]{ element };
+            this.isSorted = true;
+        }
+
+        protected internal Asn1Set(Asn1Encodable[] elements, bool doSort)
+        {
+            if (Arrays.IsNullOrContainsNull(elements))
+                throw new NullReferenceException("'elements' cannot be null, or contain null");
+
+            Asn1Encodable[] tmp = Asn1EncodableVector.CloneElements(elements);
+            if (doSort && tmp.Length >= 2)
+            {
+                tmp = Sort(tmp);
+            }
+
+            this.elements = tmp;
+            this.isSorted = doSort || tmp.Length < 2;
+        }
+
+        protected internal Asn1Set(Asn1EncodableVector elementVector, bool doSort)
+        {
+            if (null == elementVector)
+                throw new ArgumentNullException("elementVector");
+
+            Asn1Encodable[] tmp;
+            if (doSort && elementVector.Count >= 2)
+            {
+                tmp = Sort(elementVector.CopyElements());
+            }
+            else
+            {
+                tmp = elementVector.TakeElements();
+            }
+
+            this.elements = tmp;
+            this.isSorted = doSort || tmp.Length < 2;
+        }
+
+        protected internal Asn1Set(bool isSorted, Asn1Encodable[] elements)
+        {
+            this.elements = elements;
+            this.isSorted = isSorted || elements.Length < 2;
+        }
+
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        public virtual IEnumerator<Asn1Encodable> GetEnumerator()
+        {
+            IEnumerable<Asn1Encodable> e = elements;
+            return e.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 T[] MapElements<T>(Func<Asn1Encodable, T> func)
+        {
+            // NOTE: Call Count here to 'force' a LazyDerSet
+            int count = Count;
+            T[] result = new T[count];
+            for (int i = 0; i < count; ++i)
+            {
+                result[i] = func(elements[i]);
+            }
+            return result;
+        }
+
+        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;
+                // NOTE: Call Count here to 'force' a LazyDerSet
+                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()
+        {
+            // NOTE: Call Count here to 'force' a LazyDerSet
+            int i = Count;
+            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;
+
+            // NOTE: Call Count here (on both) to 'force' a LazyDerSet
+            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.Equals(o2))
+                    return false;
+            }
+
+            return true;
+        }
+
+        public override string ToString()
+        {
+            return CollectionUtilities.ToString(elements);
+        }
+
+        internal static Asn1Encodable[] Sort(Asn1Encodable[] elements)
+        {
+            int count = elements.Length;
+            if (count < 2)
+                return elements;
+
+            byte[][] keys = new byte[count][];
+            for (int i = 0; i < count; ++i)
+            {
+                keys[i] = elements[i].GetEncoded(Der);
+            }
+            Array.Sort(keys, elements, new DerComparer());
+            return elements;
+        }
+
+        private class DerComparer
+            : IComparer<byte[]>
+        {
+            public int Compare(byte[] a, byte[] b)
+            {
+                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;
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+                int compareLength = System.Math.Min(a.Length, b.Length) - 1;
+                return a.AsSpan(1, compareLength).SequenceCompareTo(b.AsSpan(1, compareLength));
+#else
+                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;
+#endif
+            }
+        }
+    }
+}
+#pragma warning restore
+#endif