Trying To Make Hmac-sha256 Work With Powershell For Canvas Api

I was appointed the task of making a process in which a PowerShell script needs to make a call to Canvas servers in order to get data out of it for other uses that are outside the

Solution 1:

In PowerShell, the default escape sequence uses backticks ` rather than backslash \.

In order for the parser to recognize the escape sequence as not just a backtick character literal and the letter n, use an expandable string (" instead of '):

$message = "GET`n`n`n`nmycrazymessage`n`nFri, 18 Nov 2016 15:29:52 GMT`nmycrazysecret"

Other than that, your HMAC signature procedure is correct (it correctly outputs Oexq8/ulAGxSIQXGDVqoXyqk5x+n9cMrc3avcTW9aZk= after changing the $message value)