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using System;
using System.Collections;
using System.IO;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1
{
public class BerOctetString
: DerOctetString, IEnumerable
{
private static readonly int DefaultChunkSize = 1000;
public static BerOctetString FromSequence(Asn1Sequence seq)
{
int count = seq.Count;
Asn1OctetString[] v = new Asn1OctetString[count];
for (int i = 0; i < count; ++i)
{
v[i] = Asn1OctetString.GetInstance(seq[i]);
}
return new BerOctetString(v);
}
private static byte[] ToBytes(Asn1OctetString[] octs)
{
MemoryStream bOut = new MemoryStream();
foreach (Asn1OctetString o in octs)
{
byte[] octets = o.GetOctets();
bOut.Write(octets, 0, octets.Length);
}
return bOut.ToArray();
}
private static Asn1OctetString[] ToOctetStringArray(IEnumerable e)
{
IList list = Platform.CreateArrayList(e);
int count = list.Count;
Asn1OctetString[] v = new Asn1OctetString[count];
for (int i = 0; i < count; ++i)
{
v[i] = Asn1OctetString.GetInstance(list[i]);
}
return v;
}
private readonly int chunkSize;
private readonly Asn1OctetString[] octs;
[Obsolete("Will be removed")]
public BerOctetString(IEnumerable e)
: this(ToOctetStringArray(e))
{
}
public BerOctetString(byte[] str)
: this(str, DefaultChunkSize)
{
}
public BerOctetString(Asn1OctetString[] octs)
: this(octs, DefaultChunkSize)
{
}
public BerOctetString(byte[] str, int chunkSize)
: this(str, null, chunkSize)
{
}
public BerOctetString(Asn1OctetString[] octs, int chunkSize)
: this(ToBytes(octs), octs, chunkSize)
{
}
private BerOctetString(byte[] str, Asn1OctetString[] octs, int chunkSize)
: base(str)
{
this.octs = octs;
this.chunkSize = chunkSize;
}
/**
* return the DER octets that make up this string.
*/
public IEnumerator GetEnumerator()
{
if (octs == null)
{
return GenerateOcts().GetEnumerator();
}
return octs.GetEnumerator();
}
[Obsolete("Use GetEnumerator() instead")]
public IEnumerator GetObjects()
{
return GetEnumerator();
}
private IList GenerateOcts()
{
IList vec = Platform.CreateArrayList();
for (int i = 0; i < str.Length; i += chunkSize)
{
int end = System.Math.Min(str.Length, i + chunkSize);
byte[] nStr = new byte[end - i];
Array.Copy(str, i, nStr, 0, nStr.Length);
vec.Add(new DerOctetString(nStr));
}
return vec;
}
internal override void Encode(
DerOutputStream derOut)
{
if (derOut is Asn1OutputStream || derOut is BerOutputStream)
{
derOut.WriteByte(Asn1Tags.Constructed | Asn1Tags.OctetString);
derOut.WriteByte(0x80);
//
// write out the octet array
//
foreach (Asn1OctetString oct in this)
{
derOut.WriteObject(oct);
}
derOut.WriteByte(0x00);
derOut.WriteByte(0x00);
}
else
{
base.Encode(derOut);
}
}
}
}
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