Variable Substring Transformation

With the Internet of Things: Edge Connect product, connected users and devices can communicate on a publish-subscribe basis within reserved namespaces. In conjunction with the Mutual Authentication behavior, this behavior affects how clients can authenticate themselves to the edge servers, and which groups within namespaces are authorized to access topics.

How it works

This behavior transforms a source string value extracted from the client certificate and stored as a variable, then extracts a substring, for use in authenticating the client request.

๐Ÿ“˜

You can apply this substring transformation, or either of the Variable Hash Transformation or Variable Regex Transformation behaviors.

Features and options

Field

What it does

Start

The zero-based index offset of the first character to extract. If the index is out of bounds of the stringโ€™s length, authentication may fail.

End

The zero-based index offset of the last character to extract, where -1 selects the remainder of the string. If the index is out of bounds of the stringโ€™s length, authentication may fail.


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