PowerShell

Configure Azure SAS Authentication for REST

Demonstrates Rest.SetAuthAzureSas, which associates an AuthAzureSAS provider so requests are authorized with an Azure Shared Access Signature token.

Background. A SAS token grants time-limited, permission-scoped access to Azure Storage resources without exposing the account key on the wire. Use SAS authorization when a query-token approach is preferred over Shared Key headers.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

$rest = New-Object Chilkat.Rest
$bTls = $true
$bAutoReconnect = $true
$success = $rest.Connect("example.com",443,$bTls,$bAutoReconnect)
if ($success -eq $false) {
    $($rest.LastErrorText)
    exit
}

#  Configure Azure Shared Access Signature (SAS) authentication.  Provide the account access key
#  and the SAS token query parameters; Chilkat adds the SAS token to each request.
$azSas = New-Object Chilkat.AuthAzureSAS
#  Normally you would not hard-code secrets in source.  You should instead obtain them from an
#  interactive prompt, environment variable, or a secrets vault.
$azSas.AccessKey = "BASE64_ACCOUNT_ACCESS_KEY"

#  Associate the provider with the REST object.
$success = $rest.SetAuthAzureSas($azSas)
if ($success -eq $false) {
    $($rest.LastErrorText)
    exit
}

$responseText = $rest.FullRequestNoBody("GET","/mycontainer/myblob.txt")
if ($rest.LastMethodSuccess -eq $false) {
    $($rest.LastErrorText)
    exit
}

$($responseText)