ListBlobs_RESTAPI_SASTokenGeneartedProgrammatically.ps1

#The below script helps in listing blobs in a container using Invoke-RestMethod with a programmatically generated SAS token

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$storageAccount = "<--your storage account name-->"
$accesskey = "<--storage account access key-->";
$resource = '?comp=list'
$version="2020-04-08"

$date = [System.DateTime]::UtcNow.ToString("R",[Globalization.CultureInfo]::InvariantCulture)

$stringToSign = "GET`n`n`n`n`n`n`n`n`n`n`n`n"+
           "x-ms-date:$date`nx-ms-version:$version`n" +
           "/$storageAccount/`ncomp:list" 
$hmacsha = New-Object System.Security.Cryptography.HMACSHA256
$hmacsha.key = [Convert]::FromBase64String($accesskey)
$signature = $hmacsha.ComputeHash([Text.Encoding]::UTF8.GetBytes($stringToSign))
$signature = [Convert]::ToBase64String($signature)

$headers=@{"x-ms-date"=$date;
           "x-ms-version"= $version;
           "Authorization"= "SharedKey $($storageAccount):$signature"
}
$URI = "https://$storageAccount.blob.core.windows.net/$($resource)"

$response = Invoke-RestMethod $URI -Method 'GET' -Headers $headers -UseBasicParsing

$response