static int DecodeHeader(IBerInput input, BerTag expectedTag)
{
var tag = BerEncoding.DecodeTag(input);
if (tag != expectedTag)
{
throw new BerException(4001, String.Format("Expected tag {0}, found tag {1}", tag, expectedTag));
}
return(BerEncoding.DecodeLength(input));
}
/// <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));
}
public static byte[] Encode(string format, params object[] args)
{
var output = new BerMemoryOutput();
var paramIndex = 0;
for (int charIndex = 0; charIndex < format.Length; charIndex++)
{
var ch = format[charIndex];
switch (ch)
{
case '{':
EncodeHeader(output, TypeTags.Sequence, BerDefinitions.IndefiniteLength);
break;
case '}':
output.WriteByte(0);
output.WriteByte(0);
break;
case 'b':
{
EncodeHeader(output, TypeTags.Boolean, 1);
BerEncoding.EncodeBoolean(output, (bool)args[paramIndex++]);
break;
}
case 'i':
case 'd':
{
var value = (int)args[paramIndex++];
var valueLength = BerEncoding.GetIntegerLength(value);
EncodeHeader(output, TypeTags.Integer, valueLength);
BerEncoding.EncodeInteger(output, value, (int)valueLength);
break;
}
case 'l':
case 't':
{
var value = (long)args[paramIndex++];
var valueLength = BerEncoding.GetLongLength(value);
EncodeHeader(output, TypeTags.Integer, valueLength);
BerEncoding.EncodeLong(output, value, (int)valueLength);
break;
}
case 's':
{
var value = (string)args[paramIndex++];
var valueLength = BerEncoding.GetUtf8StringLength(value);
EncodeHeader(output, TypeTags.UTF8String, valueLength);
BerEncoding.EncodeUtf8String(output, value);
break;
}
case 'y':
{
var value = (byte[])args[paramIndex++];
var valueLength = value.Length;
EncodeHeader(output, TypeTags.OctetString, valueLength);
BerEncoding.EncodeByteArray(output, value);
break;
}
case 'f':
case 'r':
{
var value = (double)args[paramIndex++];
var local = new BerMemoryOutput();
var valueLength = BerEncoding.EncodeReal(local, value);
EncodeHeader(output, TypeTags.Real, valueLength);
output.WriteBytes(local.Memory);
break;
}
case 'o':
{
var value = (int[])args[paramIndex++];
var local = new BerMemoryOutput();
var valueLength = BerEncoding.EncodeRelativeOid(local, value);
EncodeHeader(output, TypeTags.RelativeOid, valueLength);
output.WriteBytes(local.Memory);
break;
}
case 'g':
{
var value = (DateTime)args[paramIndex++];
var local = new BerMemoryOutput();
var valueLength = BerEncoding.EncodeGeneralizedTime(local, value);
EncodeHeader(output, TypeTags.GeneralizedTime, valueLength);
output.WriteBytes(local.Memory);
break;
}
}
}
return(output.ToArray());
}
static void EncodeHeader(IBerOutput output, BerTag tag, int length)
{
BerEncoding.EncodeTag(output, tag);
BerEncoding.EncodeLength(output, length);
}
public static object[] Decode(string format, IList <byte> data)
{
var input = new BerMemoryInput(data);
var objects = new List <object>();
for (int charIndex = 0; charIndex < format.Length; charIndex++)
{
var ch = format[charIndex];
switch (ch)
{
case '{':
DecodeHeader(input, TypeTags.Sequence);
break;
case '}':
{
if (input.ReadByte() != 0)
{
throw new BerException(4002, "Expected terminator");
}
if (input.ReadByte() != 0)
{
throw new BerException(4002, "Expected terminator");
}
break;
}
case 'b':
{
DecodeHeader(input, TypeTags.Boolean);
objects.Add(BerEncoding.DecodeBoolean(input));
break;
}
case 'i':
case 'd':
{
var valueLength = DecodeHeader(input, TypeTags.Integer);
objects.Add(BerEncoding.DecodeInteger(input, valueLength));
break;
}
case 'l':
case 't':
{
var valueLength = DecodeHeader(input, TypeTags.Integer);
objects.Add(BerEncoding.DecodeLong(input, valueLength));
break;
}
case 's':
{
var valueLength = DecodeHeader(input, TypeTags.UTF8String);
objects.Add(BerEncoding.DecodeUtf8String(input, valueLength));
break;
}
case 'y':
{
var valueLength = DecodeHeader(input, TypeTags.OctetString);
objects.Add(BerEncoding.DecodeByteArray(input, valueLength));
break;
}
case 'f':
case 'r':
{
var valueLength = DecodeHeader(input, TypeTags.Real);
objects.Add(BerEncoding.DecodeReal(input, valueLength));
break;
}
case 'o':
{
var valueLength = DecodeHeader(input, TypeTags.RelativeOid);
objects.Add(BerEncoding.DecodeRelativeOid(input, valueLength));
break;
}
case 'g':
{
var valueLength = DecodeHeader(input, TypeTags.GeneralizedTime);
objects.Add(BerEncoding.DecodeGeneralizedTime(input, valueLength));
break;
}
}
}
return(objects.ToArray());
}
