69 lines
1.5 KiB
C#
69 lines
1.5 KiB
C#
using System;
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using System.IO;
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namespace Org.BouncyCastle.Bcpg.Attr
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{
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/// <remarks>Basic type for a image attribute packet.</remarks>
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public class ImageAttrib
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: UserAttributeSubpacket
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{
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public enum Format : byte
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{
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Jpeg = 1
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}
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private static readonly byte[] Zeroes = new byte[12];
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private int hdrLength;
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private int _version;
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private int _encoding;
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private byte[] imageData;
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public ImageAttrib(
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byte[] data)
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: base(UserAttributeSubpacketTag.ImageAttribute, data)
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{
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hdrLength = ((data[1] & 0xff) << 8) | (data[0] & 0xff);
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_version = data[2] & 0xff;
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_encoding = data[3] & 0xff;
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imageData = new byte[data.Length - hdrLength];
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Array.Copy(data, hdrLength, imageData, 0, imageData.Length);
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}
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public ImageAttrib(
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Format imageType,
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byte[] imageData)
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: this(ToByteArray(imageType, imageData))
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{
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}
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private static byte[] ToByteArray(
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Format imageType,
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byte[] imageData)
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{
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MemoryStream bOut = new MemoryStream();
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bOut.WriteByte(0x10); bOut.WriteByte(0x00); bOut.WriteByte(0x01);
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bOut.WriteByte((byte) imageType);
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bOut.Write(Zeroes, 0, Zeroes.Length);
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bOut.Write(imageData, 0, imageData.Length);
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return bOut.ToArray();
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}
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public int Version
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{
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get { return _version; }
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}
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public int Encoding
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{
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get { return _encoding; }
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}
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public byte[] GetImageData()
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{
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return imageData;
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}
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}
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}
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