Amazon.S3.Encryption.EncryptionUtils.EncryptUploadPartRequestUsingInstructions C# (CSharp) Метод

        internal static Stream EncryptUploadPartRequestUsingInstructions(Stream toBeEncrypted, EncryptionInstructions instructions)
        {
            //wrap input stream into AESEncryptionStreamForUploadPart wrapper
            AESEncryptionUploadPartStream aesEStream;
            aesEStream = new AESEncryptionUploadPartStream(toBeEncrypted, instructions.EnvelopeKey, instructions.InitializationVector);
            return aesEStream;
        }
#endregion

        /// <summary>
        /// Updates the request where the input stream contains the encrypted object contents.
        /// </summary>
        /// <param name="request"></param>
        private void GenerateEncryptedUploadPartRequest(UploadPartRequest request)
        {
            string uploadID = request.UploadId;

            UploadPartEncryptionContext contextForEncryption = currentMultiPartUploadKeys[uploadID];

            byte[] envelopeKey = contextForEncryption.EnvelopeKey;
            byte[] IV          = contextForEncryption.NextIV;

            EncryptionInstructions instructions = new EncryptionInstructions(EncryptionMaterials.EmptyMaterialsDescription, envelopeKey, IV);

            if (request.IsLastPart == false)
            {
                if (contextForEncryption.IsFinalPart == true)
                {
                    throw new AmazonClientException("Last part has already been processed, cannot upload this as the last part");
                }

                if (request.PartNumber < contextForEncryption.PartNumber)
                {
                    throw new AmazonClientException("Upload Parts must in correct sequence");
                }

                request.InputStream             = EncryptionUtils.EncryptUploadPartRequestUsingInstructions(request.InputStream, instructions);
                contextForEncryption.PartNumber = request.PartNumber;
            }
            else
            {
                request.InputStream = EncryptionUtils.EncryptRequestUsingInstruction(request.InputStream, instructions);
                contextForEncryption.IsFinalPart = true;
            }
            request.RequestState.Add(S3CryptoStream, request.InputStream);
        }