using Org.BouncyCastle.Utilities; using System; namespace Org.BouncyCastle.Asn1 { public class DerOctetString : Asn1OctetString { public static readonly DerOctetString Empty = new DerOctetString(Asn1OctetString.EmptyOctets); public static DerOctetString FromContents(byte[] contents) { if (contents == null) throw new ArgumentNullException("contents"); if (contents.Length >= 1) return new DerOctetString(Arrays.Clone(contents)); return Empty; } public static DerOctetString FromContentsOptional(byte[] contents) { if (contents == null) return null; if (contents.Length >= 1) return new DerOctetString(Arrays.Clone(contents)); return Empty; } internal static DerOctetString WithContents(byte[] contents) { if (contents.Length >= 1) return new DerOctetString(contents); return Empty; } public DerOctetString(byte[] contents) : base(contents) { } public DerOctetString(IAsn1Convertible obj) : this(obj.ToAsn1Object()) { } public DerOctetString(Asn1Encodable obj) : base(obj.GetEncoded("DER")) { } internal override IAsn1Encoding GetEncoding(int encoding) { return new PrimitiveEncoding(0, 4, contents); } internal override IAsn1Encoding GetEncodingImplicit(int encoding, int tagClass, int tagNo) { return new PrimitiveEncoding(tagClass, tagNo, contents); } internal sealed override DerEncoding GetEncodingDer() { return new PrimitiveDerEncoding(0, 4, contents); } internal sealed override DerEncoding GetEncodingDerImplicit(int tagClass, int tagNo) { return new PrimitiveDerEncoding(tagClass, tagNo, contents); } internal static void Encode(Asn1OutputStream asn1Out, byte[] buf, int off, int len) { asn1Out.WriteIdentifier(0, 4); asn1Out.WriteDL(len); asn1Out.Write(buf, off, len); } } }