If I have BER/DER DEFINITE-length concatenated unique encoded PDUs in a file, how can I use the OSS ASN.1 tools to test their validity?

This example illustrates how you can do it.

The sample program is designed for checking files containing BER/DER DEFINITE-length encoded UNIQUE PDUs. The uniqueness of all the PDUs in the file is an important condition for the code to succeed. Another important condition is that the first tag-length pairs are valid, otherwise the result is unpredictable. The code reports which of the concatenated encoded PDUs have problems.

This example consists of a Windows Visual Studio project and a UNIX project zip file. You will need to do some minor adjustments based on your installation of the OSS ASN.1 Tools.

If you target an operating system other than Windows or UNIX, you can also use either of these zip files and discard the Windows- or UNIX-specific files.

Select one of the links below to download an example.

• bertestsample.windows.zip 8 KB
• bertestsample.unix.zip 4 KB

The samples included with some of the Knowledge Center answers are meant for your general understanding of the OSS products. Different versions of the products might produce slightly different outputs. Consult the products documentation and samples for the most up-to-date products information and code examples.