Microsoft.WindowsAzure.MediaServices.Client.Tests.GetKeyDeliveryUrlTests.GetWidevineKeyDeliveryUrlAndFetchLicense C# (CSharp) Method

        public void GetWidevineKeyDeliveryUrlAndFetchLicense()
        {
            IContentKey contentKey = null;
            IContentKeyAuthorizationPolicy contentKeyAuthorizationPolicy = null;
            IContentKeyAuthorizationPolicyOption policyOption = null;

            try
            {
                byte[] expectedKey = null;
                contentKey = CreateTestKey(_mediaContext, ContentKeyType.CommonEncryption, out expectedKey);

                policyOption = ContentKeyAuthorizationPolicyOptionTests.CreateOption(_mediaContext, String.Empty, ContentKeyDeliveryType.Widevine, null, "{}", ContentKeyRestrictionType.Open);

                List<IContentKeyAuthorizationPolicyOption> options = new List<IContentKeyAuthorizationPolicyOption>
                {
                    policyOption
                };

                contentKeyAuthorizationPolicy = CreateTestPolicy(_mediaContext, String.Empty, options, ref contentKey);

                Uri keyDeliveryServiceUri = contentKey.GetKeyDeliveryUrl(ContentKeyDeliveryType.Widevine);

                Assert.IsNotNull(keyDeliveryServiceUri);

                KeyDeliveryServiceClient keyClient = new KeyDeliveryServiceClient(RetryPolicy.DefaultFixed);
                string rawkey = EncryptionUtils.GetKeyIdAsGuid(contentKey.Id).ToString();

                string payload = "CAEShAEKTAgAEkgAAAACAAAQWPXbhtb/q43f3SfuC2VP3q0jeAECW3emQkWn2wXCYVOnvlWPDNqh8VVIB4GmsNA8eVVFigXkQWIGN0GlgMKjpUESLAoqChQIARIQJMPCzl2bViyMQEtyK/gtmRABGhAyNWY3ODMzMTcyMmJjM2EyGAEgv5iQkAUaIC3ON1zVgeV0rP7w2VmVLGorqClcMQO4BdbHPyk3GsnY";

                byte[] license = keyClient.AcquireWidevineLicenseWithBearerHeader(
                    keyDeliveryServiceUri,
                    TokenServiceClient.GetAuthTokenForKey(rawkey),
                    Convert.FromBase64String(payload));

                string expectedString = Convert.ToBase64String(license);
                Assert.AreEqual("CAIS", expectedString.Substring(0, 4));
            }
            finally
            {
                CleanupKeyAndPolicy(contentKey, contentKeyAuthorizationPolicy, policyOption);
            }
        }