org.asnlab.asndt.runtime.error.InvalidTagException in ASN1

[Unnikrishnan Parambath]

Hi

I have Java project which uses ASN1 decoding.
Currently I am facing below listed error whenever I tried to use
ASN1 decoding function. I really didn't got why this exception
has been happening.

Exception in thread "main" org.asnlab.asndt.runtime.error.InvalidTagException
    at org.asnlab.asndt.runtime.type.AsnType.k(zb:215)
    at org.asnlab.asndt.runtime.type.ByteBuffer.decode(pc:15)
    at org.asnlab.asndt.runtime.type.AsnType.decode(zb:256)
    at org.asnlab.asndt.runtime.type.AsnType.decode(zb:422)
    at EUTRA_RRC_Definitions.DL_DCCH_Message.ber_decode(DL_DCCH_Message.java:31)
    at MyTest.main(MyTest.java:32).
   
   
Let me share the steps which I have done below.

1. Create An ASN1 project using attached ASN1 file.
2. Created a simple Java application with single file(MyTest.java) attached.
3.Then copied all the generated Java source files (output folder of ASN1 project) in
  Java project.
4.My primary aim is to decode only "DL_DCCH_Message" structure information
as defined in the ASN1 file. so just tried to call decoding function in the attached
DL_DCCH_Message.java file.But above noted exception is encountered.

ASN1 input source file and generated java file, and Java project file are attached.
Let me inform you that I also tried to do encoding , but same problem is coming.
So could you please guide me to solve this problem.

    ASN1 input source file ------> EUTRA-RRC-Definitions.asn
    Java application project file ----> MyTest.java
    ASN1 output file ---------> DL_DCCH_Message.java


BRs
Unny

[Mukhammad Wildan]

does anyone answered your question? having same problem here.. 

[Zhiren Hu]

Hi Unny,

I think your  message is not in BER encoding rules, try decode using PER ?

Regards,
Zhiren Hu

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[Zhiren Hu]

Decoding example :

byte[] array = ...

Buffer buffer = Buffer.wrap(array, EncodingRules.ALIGNED_PACKED_ENCODING_RULES);

XXX_PDU pdu = (XXX_PDU) XXX_PDU.TYPE.decode(buffer, XXX_PDU.CONVERTER);

XXX_PDU.TYPE.print(pdu, XXX_PDU.CONVERTER, System.out);