static void AssertIsUniversal(uint type)
{
if (type >= BerType.LastUniversal ||
BerType.IsApplicationDefined(type))
{
throw new ArgumentException("type is not universal!");
}
}
/// <summary>
/// Decodes the value of the current TLV as an RelativeOid.
/// Throws an exception in case of a format mismatch.
/// </summary>
/// <returns>An array of integers containing the subidentifiers of the RelativeOid value of the current TLV.</returns>
public int[] GetRelativeOid()
{
if (IsContainer)
{
ThrowError(207, "Invalid RelativeOid encoding");
}
Debug.Assert(Value != null || Length == 0);
Debug.Assert(Type == BerType.RelativeOid || BerType.IsApplicationDefined(Type));
var input = new BerMemoryInput(Value);
return(BerEncoding.DecodeRelativeOid(input, Length));
}
/// <summary>
/// Decodes the value of the current TLV as an GeneralizedTime represented
/// as a DateTime structure.
/// Throws an exception in case of a format mismatch.
/// </summary>
/// <returns>DateTime value containing the GeneralizedTime value of the current TLV.</returns>
public DateTime GetGeneralizedTime()
{
if (IsContainer || Length == 0 || Value == null)
{
ThrowError(208, "Invalid GeneralizedTime encoding");
}
Debug.Assert(Value != null || Length == 0);
Debug.Assert(Type == BerType.GeneralizedTime || BerType.IsApplicationDefined(Type));
var input = new BerMemoryInput(Value);
return(BerEncoding.DecodeGeneralizedTime(input, Length));
}
/// <summary>
/// Decodes the value of the current TLV as an OBJECT IDENTIFIER represented
/// as an integer array, each integer containing one sub-identifier.
/// Throws an exception in case of a format mismatch.
/// </summary>
/// <returns>Integer array containing the OBJECT IDENTIFIER value of the current TLV.</returns>
public int[] GetObjectIdentifier()
{
if (IsContainer || Length == 0 || Value == null)
{
ThrowError(209, "Invalid ObjectIdentifier encoding");
}
Debug.Assert(Value != null || Length == 0);
Debug.Assert(Type == BerType.ObjectIdentifier || BerType.IsApplicationDefined(Type));
var input = new BerMemoryInput(Value);
return(BerEncoding.DecodeObjectIdentifier(input, Length));
}
/// <summary>
/// Decodes the value of the current TLV as an octet string (byte array).
/// Throws an exception in case of a format mismatch.
/// </summary>
/// <returns>Byte array containing the OCTET STRING value of the current TLV.</returns>
public byte[] GetOctetString()
{
if (IsContainer)
{
ThrowError(206, "Invalid OctetString encoding");
}
Debug.Assert(Value != null || Length == 0);
Debug.Assert(Type == BerType.OctetString || BerType.IsApplicationDefined(Type));
var input = new BerMemoryInput(Value);
return(BerEncoding.DecodeByteArray(input, Length));
}
/// <summary>
/// Decodes the value of the current TLV an UTF-8 string.
/// Throws an exception in case of a format mismatch.
/// </summary>
/// <returns>The string value of the current TLV.</returns>
public string GetString()
{
if (IsContainer)
{
ThrowError(205, "Invalid String encoding");
}
Debug.Assert(Value != null || Length == 0);
Debug.Assert(Type == BerType.UTF8String || Type == BerType.Bitstring || BerType.IsApplicationDefined(Type));
var input = new BerMemoryInput(Value);
return(BerEncoding.DecodeUtf8String(input, Length));
}
/// <summary>
/// Decodes the value of the current TLV a 64bit integer.
/// Throws an exception in case of a format mismatch.
/// </summary>
/// <returns>The integer value of the current TLV.</returns>
public long GetLong()
{
if (IsContainer || Length == 0 || Value == null)
{
ThrowError(203, "Invalid Integer encoding");
}
Debug.Assert(Value != null || Length == 0);
Debug.Assert(Type == BerType.Integer || BerType.IsApplicationDefined(Type));
var input = new BerMemoryInput(Value);
return(BerEncoding.DecodeLong(input, Length));
}
/// <summary>
/// Decodes the value of the current TLV as boolean.
/// Throws an exception in case of a format mismatch.
/// </summary>
/// <returns>The boolean value of the current TLV.</returns>
public bool GetBoolean()
{
if (IsContainer || Length == 0 || Value == null)
{
ThrowError(201, "Invalid Boolean encoding");
}
Debug.Assert(Value != null || Length == 0);
Debug.Assert(Type == BerType.Boolean || BerType.IsApplicationDefined(Type));
var input = new BerMemoryInput(Value);
return(BerEncoding.DecodeBoolean(input));
}
/// <summary>
/// Gets the name of the type passed in <paramref name="type"/> in PascalCase
/// (e.g. 'ObjectIdentifier' if type equals 6).
/// If <paramref name="type"/> is an application-defined type, returns a name
/// in the form 'A-1' (for type APPLICATION 1).
/// </summary>
/// <param name="type">Usually one of the BerType constants.</param>
/// <returns></returns>
public static string GetTypeName(uint type)
{
if (BerType.IsApplicationDefined(type))
{
return(String.Format("A-{0}", type & ~BerType.ApplicationFlag));
}
var typeName = null as string;
if (type < TypeNames.Length)
{
typeName = TypeNames[type];
}
return(typeName ?? type.ToString());
}