public void Generate()
{
var i = new Integer32(300);
var buffer = new MutableByte();
i.Encode(buffer);
var expected = new byte[]
{
SnmpConstants.SmiInteger, // ASN.1 Type
0x02, // Length
0x01, 0x2C, // 300 in big endian
};
Assert.Equal(expected, buffer);
}
/// <summary>BER encode security model field.</summary>
/// <remarks>
/// USM security model is a SEQUENCE encoded inside a OCTETSTRING. To encode it, first encode the sequence
/// of class values then "wrap" it inside a OCTETSTRING field
/// </remarks>
/// <param name="buffer">Buffer to store encoded USM security model header</param>
public override void Encode(MutableByte buffer)
{
MutableByte tmp = new MutableByte();
// First encode all the values that will form the sequence
engineId.Encode(tmp);
// Encode engine boots
engineBoots.Encode(tmp);
// encode engine time
engineTime.Encode(tmp);
securityName.Encode(tmp);
if (authentication != AuthenticationDigests.None)
{
if (authenticationParameters.Length <= 0)
{
// If authentication is used, set authentication parameters field to 12 bytes set to 0x00
authenticationParameters.Set(new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 });
}
}
else
{
authenticationParameters.Reset();
}
authenticationParameters.Encode(tmp);
if (privacy != EPrivacyProtocols.None)
{
if (privacyParameters.Length <= 0)
{
IPrivacyProtocol privProto = PrivacyProtocol.GetInstance(privacy);
if (privProto != null)
{
byte[] parameter = new byte[privProto.PrivacyParametersLength];
for (int i = 0; i < privProto.PrivacyParametersLength; i++)
{
parameter[i] = 0x00; // This is not necessary since all array members are, by default, initialized to 0
}
privacyParameters.Set(parameter);
}
else
{
throw new SnmpException(SnmpException.EErrorCode.UnsupportedPrivacyProtocol, "Unrecognized privacy protocol specified.");
}
}
}
else
{
privacyParameters.Reset();
}
privacyParameters.Encode(tmp);
MutableByte tmp1 = new MutableByte();
BuildHeader(tmp1, SnmpConstants.SmiSequence, tmp.Length);
tmp1.Append(tmp);
BuildHeader(buffer, (byte)EAsnType.OctetString, tmp1.Length);
buffer.Append(tmp1);
}