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Microsoft Azure Rest API using PowerShell Part 2

While working on Microsoft Azure Rest API using PowerShell script, there is prerequisite to create a service principal (App Registration) first and use its client id and secrets in headers to generate bearer token key. But I was looking to use my existing username and password as credentials. For this requirement, I utilized Microsoft dll libraries which are included with AzureAD PowerShell module. Next provide Tenant Id and Subscription Id. In this example I will use Rest API url to list Storage Accounts as mentioned on the https://docs.microsoft.com/en-us/rest/api/storagerp/storageaccounts/list. While authentication it asks for credentials in html gui.

Note: This scipt only works on Windows Powershell Version 5.1 and it is not compatible with v7.

Microsoft Azure Rest Api Powershell microsoft.identityModel.clients.activeDirectory.windowsForms.dll tenant id subscription new-object authenticationcontext invoke-restmethod authorization authheader.png

Download this script here or it is also available on github.com.

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#Url:  http://vcloud-lab.com
#Date: 19 December 2020
#Author: Janvi

#Microsoft Azure dll login libraries
$adal = "$PSScriptRoot\dll\Microsoft.IdentityModel.Clients.ActiveDirectory.dll"
$adalforms = "$PSScriptRoot\dll\Microsoft.IdentityModel.Clients.ActiveDirectory.WindowsForms.dll"
[void][System.Reflection.Assembly]::LoadFrom($adal)
[void][System.Reflection.Assembly]::LoadFrom($adalforms)

#Tenant and Subscription Id details
$tenantId = '3b80xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'
$subscriptionId = '9e22xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'

#Import Microsoft Azure dll login libraries and show Azure login page
$authContext = New-Object "Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext" -ArgumentList "https://login.windows.net/$tenantId"
$authResult = $authContext.AcquireToken('https://management.azure.com/', '1950a258-227b-4e31-a9cf-717495945fc2', 'urn:ietf:wg:oauth:2.0:oob', 'always')

#Get Authentication Header (Expires after some time)
$authHeader = $authResult.CreateAuthorizationHeader()

#Get the list of all Microsoft Azure Storage Accounts
$params = @{
	ContentType = 'application/x-www-form-urlencoded'
	Headers	= @{
		'authorization' = $authHeader
	}
	Method = 'Get'
	URI	= "https://management.azure.com/subscriptions/$subscriptionId/providers/Microsoft.Storage/storageAccounts?api-version=2019-06-01"
}
Invoke-RestMethod @params | Select-Object -ExpandProperty value | Select-Object name, location

If you try this script on Powershell version 7 you get below error. I confirmed that I am getting same error when using Connect-AzureAD on Powershell v7 (AzureAD Powershell module), which uses same dll libraries, it was throwing same error.

Microsoft Azure Rest Api Connect-AzureAD could not load type system.security.cryptography.sha256cng from assembly system.core publickeytoken Powershell 7 error compatibility issue.png

One or more errors occurred. (Could not load type 'System.Security.Cryptography.SHA256Cng' from assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.): Could not load type 'System.Security.Cryptography.SHA256Cng' from assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

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