Category: Azure Integration Services

Azure, Azure Integration Services

MalformedToken: Invalid authorization header: The request is missing WRAP authorization credentials.

Manjunath

I was stuck error “MalformedToken: Invalid authorization header: The request is missing WRAP authorization credentials.” while configuring WCF relay in the API management application and BizTalk.

Flow is APIM -> Azure Relay -> BizTalk receive location.

Issue was coming when the APIM was trying to communicate to Azure Relay. I wasn’t sure what was the problem initially but some thing was wrong with Authorization header.

Later on i realized, by reading many msdn articles on how SAS token works. SAS Token is not SAS authorization key we see in Azure portal. SAS token needs to be generated via code as in the article https://docs.microsoft.com/en-us/rest/api/eventhub/generate-sas-token. I picked up PowerShell do it.

Also when i started using this, realized this SAS token generated is valid only for 300 secs. If you want to generate SAS token for infinite then could use 500 years as expiry time.

[Reflection.Assembly]::LoadWithPartialName(“System.Web”)| out-null
$URI=”<relay name>.servicebus.windows.net”
$Access_Policy_Name=”RootManageSharedAccessKey”
$Access_Policy_Key=”<shared access key>”
#Token expires now+300
$Expires=([DateTimeOffset]::Now.AddYears(500).ToUnixTimeSeconds())+300
$SignatureString=[System.Web.HttpUtility]::UrlEncode($URI)+ “`n” + [string]$Expires
$HMAC = New-Object System.Security.Cryptography.HMACSHA256
$HMAC.key = [Text.Encoding]::ASCII.GetBytes($Access_Policy_Key)
$Signature = $HMAC.ComputeHash([Text.Encoding]::ASCII.GetBytes($SignatureString))
$Signature = [Convert]::ToBase64String($Signature)
$SASToken = “SharedAccessSignature sr=” + [System.Web.HttpUtility]::UrlEncode($URI) + “&sig=” + [System.Web.HttpUtility]::UrlEncode($Signature) + “&se=” + $Expires + “&skn=” + $Access_Policy_Name
$SASToken

This article is valid for service bus queue, tables, storage and many azure resources using SAS token based authorization.

Azure Integration Services, BizTalk, Technology and tricks

Basic use cases in XSLT

Manjunath
Basic programming use cases in XSLT
Use case Relevant XSLT elements
Creating nodes xsl:element, xsl:attribute, xsl:text, xsl:comment, xsl:processing-instruction
Copying nodes xsl:copy-of, xsl:copy
Repetition (looping) xsl:for-each
Sorting xsl:sort
Conditional processing xsl:choose, xsl:if
Computing or extracting a value xsl:value-of
Defining variables and parameters xsl:variable, xsl:param
Defining and calling subprocedures (named templates) xsl:template, xsl:call-template
Defining and applying template rules xsl:template, xsl:apply-templates, xsl:apply-imports
Numbering and number formatting xsl:number, xsl:decimal-format
Debugging xsl:message
Combining stylesheets (modularization) xsl:import, xsl:include
Compatibility xsl:fallback
Building lookup indexes xsl:key
XSLT code generation xsl:namespace-alias
Output formatting xsl:output
Whitespace stripping xsl:strip-space, xsl:preserve-space