/// <summary>
/// Write TLV object to given stream.
/// </summary>
/// <param name="tag">TLV object</param>
public static ushort GetTlvLength(ITlvTag tag)
{
if (tag == null)
{
throw new ArgumentNullException(nameof(tag));
}
byte[] data = tag.EncodeValue();
bool tlv16 = tag.Type > Constants.Tlv.TypeMask ||
(data != null && data.Length > byte.MaxValue);
if (tlv16)
{
if (data != null && data.Length > ushort.MaxValue)
{
throw new ArgumentOutOfRangeException(nameof(data));
}
// first 2 bytes + 2 length bytes + data
return((ushort)(4 + (data?.Length ?? 0)));
}
// first byte + length byte + data
return((ushort)(2 + (data?.Length ?? 0)));
}
/// <summary>
/// Create new Integer TLV element from TLV element.
/// </summary>
/// <param name="tag">TLV element</param>
public IntegerTag(ITlvTag tag) : base(tag)
{
byte[] data = tag.EncodeValue();
if (data == null)
{
throw new TlvException("Invalid TLV element encoded value: null.");
}
Value = Util.DecodeUnsignedLong(data, 0, data.Length, true);
}
/// <summary>
/// Create new imprint TLV element from TLV element.
/// </summary>
/// <param name="tag">TLV element</param>
public ImprintTag(ITlvTag tag) : base(tag)
{
byte[] data = tag.EncodeValue();
if (data == null)
{
throw new TlvException("Invalid TLV element encoded value: null.");
}
Value = new DataHash(data);
}
/// <summary>
/// Write TLV object to given stream.
/// </summary>
/// <param name="tag">TLV object</param>
public void WriteTag(ITlvTag tag)
{
if (tag == null)
{
return;
}
if (tag.Type > Constants.Tlv.MaxType)
{
throw new ArgumentOutOfRangeException(nameof(tag));
}
byte[] data = tag.EncodeValue();
bool tlv16 = ((tag as TlvTag)?.ForceTlv16Encoding ?? false) ||
tag.Type > Constants.Tlv.TypeMask ||
(data != null && data.Length > byte.MaxValue);
byte firstByte = (byte)((tlv16 ? Constants.Tlv.Tlv16Flag : 0)
+ (tag.NonCritical ? Constants.Tlv.NonCriticalFlag : 0)
+ (tag.Forward ? Constants.Tlv.ForwardFlag : 0));
if (tlv16)
{
firstByte = (byte)(firstByte
| (tag.Type >> Constants.BitsInByte) & Constants.Tlv.TypeMask);
Write(firstByte);
Write((byte)tag.Type);
if (data == null)
{
Write((byte)0);
}
else
{
if (data.Length > ushort.MaxValue)
{
throw new ArgumentOutOfRangeException(nameof(data));
}
Write((byte)(data.Length >> Constants.BitsInByte));
Write((byte)data.Length);
Write(data);
}
}
else
{
firstByte = (byte)(firstByte | tag.Type & Constants.Tlv.TypeMask);
Write(firstByte);
if (data == null)
{
Write((byte)0);
}
else
{
Write((byte)data.Length);
Write(data);
}
}
}
/// <summary>
/// Create new octet string TLV element from TLV element.
/// </summary>
/// <param name="tag">TLV element</param>
public RawTag(ITlvTag tag) : base(tag)
{
byte[] data = tag.EncodeValue();
if (data == null)
{
throw new TlvException("Invalid TLV element encoded value: null.");
}
_value = data;
}
/// <summary>
/// Create string TLV element from TLV element.
/// </summary>
/// <param name="tag">TLV element</param>
public StringTag(ITlvTag tag) : base(tag)
{
byte[] data = tag.EncodeValue();
if (data == null)
{
throw new TlvException("Invalid TLV element encoded value: null.");
}
Value = Util.DecodeNullTerminatedUtf8String(data);
}
public void TlvTagBuilderGetTagByTypeTest()
{
RawTag child1 = new RawTag(0x1, true, false, new byte[] { 0x1, 0x2 });
RawTag child2 = new RawTag(0x2, true, false, new byte[] { 0x3, 0x4 });
CompositeTestTag tag = new CompositeTestTag(0x1, false, false,
new ITlvTag[]
{
child1,
child2
});
TlvTagBuilder builder = new TlvTagBuilder(tag);
ITlvTag seachedTag = builder.GetChildByType(0x2);
CollectionAssert.AreEqual(seachedTag.EncodeValue(), child2.EncodeValue(), "Invalid child returned.");
}
/// <summary>
/// Parse and validate the current tags.
/// </summary>
/// <param name="tag">TLV element that current TLV element is created from.</param>
private void ParseAndValidate(ITlvTag tag)
{
CheckTagType();
ParseAndValidateChildTags(DecodeChildTags(tag.EncodeValue()));
}