private async Task <ResponseMessage> ReadItemHelperAsync(
string id,
PartitionKey partitionKey,
ItemRequestOptions requestOptions,
bool decryptResponse,
CosmosDiagnosticsContext diagnosticsContext,
CancellationToken cancellationToken)
{
ResponseMessage responseMessage = await this.container.ReadItemStreamAsync(
id,
partitionKey,
requestOptions,
cancellationToken);
if (decryptResponse)
{
(responseMessage.Content, _) = await EncryptionProcessor.DecryptAsync(
responseMessage.Content,
this.Encryptor,
diagnosticsContext,
cancellationToken);
}
return(responseMessage);
}
private async Task <TransactionalBatchResponse> DecryptTransactionalBatchResponseAsync(
TransactionalBatchResponse response,
CosmosDiagnosticsContext diagnosticsContext,
CancellationToken cancellationToken)
{
List <TransactionalBatchOperationResult> decryptedTransactionalBatchOperationResults = new List <TransactionalBatchOperationResult>();
for (int index = 0; index < response.Count; index++)
{
TransactionalBatchOperationResult result = response[index];
if (response.IsSuccessStatusCode && result.ResourceStream != null)
{
(Stream decryptedStream, _) = await EncryptionProcessor.DecryptAsync(
result.ResourceStream,
this.encryptor,
diagnosticsContext,
cancellationToken);
result = new EncryptionTransactionalBatchOperationResult(response[index], decryptedStream);
}
decryptedTransactionalBatchOperationResults.Add(result);
}
return(new EncryptionTransactionalBatchResponse(
decryptedTransactionalBatchOperationResults,
response,
this.cosmosSerializer));
}
internal static async Task <Stream> DeserializeAndDecryptResponseAsync(
Stream content,
Encryptor encryptor,
CancellationToken cancellationToken)
{
JObject contentJObj = EncryptionProcessor.BaseSerializer.FromStream <JObject>(content);
if (!(contentJObj.SelectToken(Constants.DocumentsResourcePropertyName) is JArray documents))
{
throw new InvalidOperationException("Feed Response body contract was violated. Feed response did not have an array of Documents");
}
foreach (JToken value in documents)
{
if (!(value is JObject document))
{
continue;
}
CosmosDiagnosticsContext diagnosticsContext = CosmosDiagnosticsContext.Create(null);
using (diagnosticsContext.CreateScope("EncryptionProcessor.DeserializeAndDecryptResponseAsync"))
{
await EncryptionProcessor.DecryptAsync(
document,
encryptor,
diagnosticsContext,
cancellationToken);
}
}
// the contents of contentJObj get decrypted in place for MDE algorithm model, and for legacy model _ei property is removed
// and corresponding decrypted properties are added back in the documents.
return(EncryptionProcessor.BaseSerializer.ToStream(contentJObj));
}
private async Task <TransactionalBatchResponse> DecryptTransactionalBatchResponseAsync(
TransactionalBatchResponse response,
CosmosDiagnosticsContext diagnosticsContext,
CancellationToken cancellationToken)
{
List <TransactionalBatchOperationResult> decryptedTransactionalBatchOperationResults = new List <TransactionalBatchOperationResult>();
foreach (TransactionalBatchOperationResult result in response)
{
if (response.IsSuccessStatusCode && result.ResourceStream != null)
{
(Stream decryptedStream, _) = await EncryptionProcessor.DecryptAsync(
result.ResourceStream,
this.encryptor,
diagnosticsContext,
cancellationToken);
decryptedTransactionalBatchOperationResults.Add(new EncryptionTransactionalBatchOperationResult(result, decryptedStream));
}
else
{
decryptedTransactionalBatchOperationResults.Add(result);
}
}
return(new EncryptionTransactionalBatchResponse(
decryptedTransactionalBatchOperationResults,
response,
this.cosmosSerializer));
}
private async Task <ResponseMessage> ReplaceItemHelperAsync(
Stream streamPayload,
string id,
PartitionKey partitionKey,
ItemRequestOptions requestOptions,
bool decryptResponse,
CosmosDiagnosticsContext diagnosticsContext,
CancellationToken cancellationToken)
{
if (!(requestOptions is EncryptionItemRequestOptions encryptionItemRequestOptions) ||
encryptionItemRequestOptions.EncryptionOptions == null)
{
return(await this.container.ReplaceItemStreamAsync(
streamPayload,
id,
partitionKey,
requestOptions,
cancellationToken));
}
if (partitionKey == null)
{
throw new NotSupportedException($"{nameof(partitionKey)} cannot be null for operations using {nameof(EncryptionContainer)}.");
}
streamPayload = await EncryptionProcessor.EncryptAsync(
streamPayload,
this.Encryptor,
encryptionItemRequestOptions.EncryptionOptions,
diagnosticsContext,
cancellationToken);
ResponseMessage responseMessage = await this.container.ReplaceItemStreamAsync(
streamPayload,
id,
partitionKey,
requestOptions,
cancellationToken);
if (decryptResponse)
{
(responseMessage.Content, _) = await EncryptionProcessor.DecryptAsync(
responseMessage.Content,
this.Encryptor,
diagnosticsContext,
cancellationToken);
}
return(responseMessage);
}
internal static async Task <Stream> DeserializeAndDecryptResponseAsync(
Stream content,
Encryptor encryptor,
CancellationToken cancellationToken)
{
JObject contentJObj = EncryptionProcessor.BaseSerializer.FromStream <JObject>(content);
JArray result = new JArray();
if (!(contentJObj.SelectToken(Constants.DocumentsResourcePropertyName) is JArray documents))
{
throw new InvalidOperationException("Feed Response body contract was violated. Feed response did not have an array of Documents");
}
foreach (JToken value in documents)
{
if (!(value is JObject document))
{
result.Add(value);
continue;
}
CosmosDiagnosticsContext diagnosticsContext = CosmosDiagnosticsContext.Create(null);
using (diagnosticsContext.CreateScope("EncryptionProcessor.DeserializeAndDecryptResponseAsync"))
{
(JObject decryptedDocument, DecryptionContext _) = await EncryptionProcessor.DecryptAsync(
document,
encryptor,
diagnosticsContext,
cancellationToken);
result.Add(decryptedDocument);
}
}
JObject decryptedResponse = new JObject();
foreach (JProperty property in contentJObj.Properties())
{
if (property.Name.Equals(Constants.DocumentsResourcePropertyName))
{
decryptedResponse.Add(property.Name, (JToken)result);
}
else
{
decryptedResponse.Add(property.Name, property.Value);
}
}
return(EncryptionProcessor.BaseSerializer.ToStream(decryptedResponse));
}
public override ChangeFeedProcessorBuilder GetChangeFeedProcessorBuilder <T>(
string processorName,
ChangesHandler <T> onChangesDelegate)
{
CosmosDiagnosticsContext diagnosticsContext = CosmosDiagnosticsContext.Create(null);
using (diagnosticsContext.CreateScope("GetChangeFeedProcessorBuilder"))
{
return(this.container.GetChangeFeedProcessorBuilder(
processorName,
async(IReadOnlyCollection <JObject> documents, CancellationToken cancellationToken) =>
{
List <T> decryptItems = new List <T>(documents.Count);
if (typeof(T) == typeof(DecryptableItem))
{
foreach (JToken value in documents)
{
DecryptableItemCore item = new DecryptableItemCore(
value,
this.Encryptor,
this.CosmosSerializer);
decryptItems.Add((T)(object)item);
}
}
else
{
foreach (JObject document in documents)
{
(JObject decryptedDocument, DecryptionContext _) = await EncryptionProcessor.DecryptAsync(
document,
this.Encryptor,
diagnosticsContext,
cancellationToken);
decryptItems.Add(decryptedDocument.ToObject <T>());
}
}
// Call the original passed in delegate
await onChangesDelegate(decryptItems, cancellationToken);
}));
}
}
private async Task <ResponseMessage> CreateItemHelperAsync(
Stream streamPayload,
PartitionKey partitionKey,
ItemRequestOptions requestOptions,
bool decryptResponse,
CosmosDiagnosticsContext diagnosticsContext,
CancellationToken cancellationToken)
{
if (!(requestOptions is EncryptionItemRequestOptions encryptionItemRequestOptions) ||
encryptionItemRequestOptions.EncryptionOptions == null)
{
return(await this.container.CreateItemStreamAsync(
streamPayload,
partitionKey,
requestOptions,
cancellationToken));
}
streamPayload = await EncryptionProcessor.EncryptAsync(
streamPayload,
this.Encryptor,
encryptionItemRequestOptions.EncryptionOptions,
diagnosticsContext,
cancellationToken);
ResponseMessage responseMessage = await this.container.CreateItemStreamAsync(
streamPayload,
partitionKey,
requestOptions,
cancellationToken);
if (decryptResponse)
{
(responseMessage.Content, _) = await EncryptionProcessor.DecryptAsync(
responseMessage.Content,
this.Encryptor,
diagnosticsContext,
cancellationToken);
}
return(responseMessage);
}
