public async Task <string> GetModulePrimaryKey(RequestedResource sr)
{
var credentials = SdkContext.AzureCredentialsFactory.FromMSI(new MSILoginInformation(MSIResourceType.AppService),
AzureEnvironment.AzureGlobalCloud);
var azure = Azure
.Configure()
.WithLogLevel(HttpLoggingDelegatingHandler.Level.Basic)
.Authenticate(credentials)
.WithDefaultSubscription();
string iothubowner = string.Empty;
var azureServiceTokenProvider = new AzureServiceTokenProvider();
string accessToken = await azureServiceTokenProvider.GetAccessTokenAsync("https://management.azure.com");
IotHubClient hubClient = new IotHubClient(new TokenCredentials(accessToken))
{
SubscriptionId = azure.GetCurrentSubscription().SubscriptionId
};
var listHubs = await hubClient.IotHubResource.ListBySubscriptionAsync();
do
{
var hub = listHubs.Where(iothub => string.Equals(iothub.Name, sr.iotHubName)).FirstOrDefault();
if (!string.IsNullOrEmpty(hub.Id))
{
iothubowner = (await hubClient.IotHubResource.GetKeysForKeyNameAsync(GetResourceGroupName(hub.Id), hub.Name, "iothubowner")).PrimaryKey;
break;
}
} while (!string.IsNullOrEmpty(listHubs.NextPageLink));
if (string.IsNullOrEmpty(iothubowner))
{
throw new Exception("Failed to retrieve IoT Hub Primary Key string");
}
string iotHubConnString = IotHubConnectionStringBuilder.Create(sr.iotHubFQDN, new ServiceAuthenticationWithSharedAccessPolicyKey("iothubowner", iothubowner)).ToString();
RegistryManager registryManager = RegistryManager.CreateFromConnectionString(iotHubConnString);
var modulesOnDevice = await registryManager.GetModuleAsync(sr.deviceId, sr.moduleId);
return(!string.IsNullOrEmpty(modulesOnDevice.Authentication.SymmetricKey.PrimaryKey) ? modulesOnDevice.Authentication.SymmetricKey.PrimaryKey : null);
}
public AuthorizationHeaderHandler(string receivedHeader)
{
try
{
receivedHeader = System.Net.WebUtility.UrlDecode(receivedHeader);
IDictionary <string, string> parsedFields = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
string[] fields = receivedHeader.Replace("SharedAccessSignature ", "").Trim().Split("&", StringSplitOptions.None);
foreach (string field in fields)
{
if (field != string.Empty)
{
string[] fieldParts = field.Split("=", StringSplitOptions.None);
if (fieldParts[0].Equals("sig"))
{
//Replace switched characters and properly pad the base64 signature
fieldParts[1] = fieldParts[1].Replace('-', '+').Replace('_', '/');
if (fieldParts[1].Length % 4 == 2)
{
fieldParts[1] += "==";
}
else if (fieldParts[1].Length % 4 == 3)
{
fieldParts[1] += "=";
}
}
parsedFields.Add(fieldParts[0], fieldParts[1]);
}
}
requestedResource = new RequestedResource(parsedFields["sr"]);
expiry = parsedFields["se"];
signature = parsedFields["sig"];
}
catch (Exception)
{
throw new Exception("Invalid header received");
}
}
