Versi 4 (V4) dari AWS SDK untuk .NET telah dirilis\$1

Untuk informasi tentang melanggar perubahan dan memigrasi aplikasi Anda, lihat [topik migrasi](https://docs.aws.amazon.com/sdk-for-net/v4/developer-guide/net-dg-v4.html).

 [https://docs.aws.amazon.com/sdk-for-net/v4/developer-guide/net-dg-v4.html](https://docs.aws.amazon.com/sdk-for-net/v4/developer-guide/net-dg-v4.html)

Terjemahan disediakan oleh mesin penerjemah. Jika konten terjemahan yang diberikan bertentangan dengan versi bahasa Inggris aslinya, utamakan versi bahasa Inggris.

# Menggunakan AWS KMS kunci untuk enkripsi Amazon S3 di AWS SDK untuk .NET
<a name="kms-keys-s3-encryption"></a>

Contoh ini menunjukkan cara menggunakan AWS Key Management Service kunci untuk mengenkripsi objek Amazon S3. Aplikasi ini membuat kunci master pelanggan (CMK) dan menggunakannya untuk membuat objek [AmazonS3 EncryptionClient V2](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.AmazonS3EncryptionClientV2.html) untuk enkripsi sisi klien. Aplikasi menggunakan klien tersebut untuk membuat objek terenkripsi dari file teks tertentu di bucket Amazon S3 yang ada. Kemudian mendekripsi objek dan menampilkan isinya.

**Awas**  
Kelas serupa yang `AmazonS3EncryptionClient` disebut tidak digunakan lagi dan kurang aman daripada kelas. `AmazonS3EncryptionClientV2` Untuk memigrasikan kode yang ada yang menggunakan`AmazonS3EncryptionClient`, lihat[Migrasi Klien Enkripsi S3 (V1 ke V2)](s3-encryption-migration-v1-v2.md).

**Topics**
+ [Buat bahan enkripsi](#kms-s3-enc-mat)
+ [Membuat dan mengenkripsi objek Amazon S3](#kms-s3-create-ojbect)
+ [Kode lengkap](#kms-s3-complete-code)
+ [Pertimbangan tambahan](#kms-s3-additional)

## Buat bahan enkripsi
<a name="kms-s3-enc-mat"></a>

Cuplikan berikut membuat `EncryptionMaterials` objek yang berisi ID kunci KMS.

Contoh [di akhir topik ini](#kms-s3-complete-code) menunjukkan cuplikan ini digunakan.

```
      // Create a customer master key (CMK) and store the result
      CreateKeyResponse createKeyResponse =
        await new AmazonKeyManagementServiceClient().CreateKeyAsync(new CreateKeyRequest());
      var kmsEncryptionContext = new Dictionary<string, string>();
      var kmsEncryptionMaterials = new EncryptionMaterialsV2(
        createKeyResponse.KeyMetadata.KeyId, KmsType.KmsContext, kmsEncryptionContext);
```

## Membuat dan mengenkripsi objek Amazon S3
<a name="kms-s3-create-ojbect"></a>

Cuplikan berikut membuat `AmazonS3EncryptionClientV2` objek yang menggunakan bahan enkripsi yang dibuat sebelumnya. Kemudian menggunakan klien untuk membuat dan mengenkripsi objek Amazon S3 baru.

Contoh [di akhir topik ini](#kms-s3-complete-code) menunjukkan cuplikan ini digunakan.

```
    //
    // Method to create and encrypt an object in an S3 bucket
    static async Task<GetObjectResponse> CreateAndRetrieveObjectAsync(
      EncryptionMaterialsV2 materials, string bucketName,
      string fileName, string itemName)
    {
      // CryptoStorageMode.ObjectMetadata is required for KMS EncryptionMaterials
      var config = new AmazonS3CryptoConfigurationV2(SecurityProfile.V2AndLegacy)
      {
        StorageMode = CryptoStorageMode.ObjectMetadata
      };
      var s3EncClient = new AmazonS3EncryptionClientV2(config, materials);

      // Create, encrypt, and put the object
      await s3EncClient.PutObjectAsync(new PutObjectRequest
      {
        BucketName = bucketName,
        Key = itemName,
        ContentBody = File.ReadAllText(fileName)
      });

      // Get, decrypt, and return the object
      return await s3EncClient.GetObjectAsync(new GetObjectRequest
      {
        BucketName = bucketName,
        Key = itemName
      });
    }
```

## Kode lengkap
<a name="kms-s3-complete-code"></a>

Bagian ini menunjukkan referensi yang relevan dan kode lengkap untuk contoh ini.

### Referensi SDK
<a name="w2aac19c15c25c13c15b5b1"></a>

NuGet paket:
+ [Amazon.Extensions.S3.Encryption](https://www.nuget.org/packages/Amazon.Extensions.S3.Encryption)

Elemen pemrograman:
+ [Namespace Amazon.Extensions.S3.Encryption](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.html)

  Kelas [EncryptionClientAmazonS3](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.AmazonS3EncryptionClientV2.html) V2

  Kelas [CryptoConfigurationAmazonS3](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.AmazonS3CryptoConfigurationV2.html) V2

  Kelas [CryptoStorageMode](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.CryptoStorageMode.html)

  Kelas [EncryptionMaterialsV2](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.EncryptionMaterialsV2.html)
+ [Namespace Amazon.Extensions.S3.Encryption.Primitives](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.Primitives.html)

  Kelas [KmsType](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.Primitives.KmsType.html)
+ [Namespace Amazon.S3.Model](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/S3/NS3Model.html)

  Kelas [GetObjectRequest](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/S3/TGetObjectRequest.html)

  Kelas [GetObjectResponse](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/S3/TGetObjectResponse.html)

  Kelas [PutObjectRequest](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/S3/TPutObjectRequest.html)
+ [Namespace Amazon. KeyManagementService](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/KeyManagementService/NKeyManagementService.html)

  Kelas [AmazonKeyManagementServiceClient](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/KeyManagementService/TKeyManagementServiceClient.html)
+ [Namespace Amazon. KeyManagementService.Model](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/KeyManagementService/NKeyManagementServiceModel.html)

  Kelas [CreateKeyRequest](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/KeyManagementService/TCreateKeyRequest.html)

  Kelas [CreateKeyResponse](https://docs.aws.amazon.com/sdkfornet/v4/apidocs/items/KeyManagementService/TCreateKeyResponse.html)

### Kodenya
<a name="w2aac19c15c25c13c15b7b1"></a>

```
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using Amazon.Extensions.S3.Encryption;
using Amazon.Extensions.S3.Encryption.Primitives;
using Amazon.S3.Model;
using Amazon.KeyManagementService;
using Amazon.KeyManagementService.Model;

namespace KmsS3Encryption
{
  // = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
  // Class to store text in an encrypted S3 object.
  class Program
  {
    private const int MaxArgs = 3;

    public static async Task Main(string[] args)
    {
      // Parse the command line and show help if necessary
      var parsedArgs = CommandLine.Parse(args);
      if((parsedArgs.Count == 0) || (parsedArgs.Count > MaxArgs))
      {
        PrintHelp();
        return;
      }

      // Get the application arguments from the parsed list
      string bucketName =
        CommandLine.GetArgument(parsedArgs, null, "-b", "--bucket-name");
      string fileName =
        CommandLine.GetArgument(parsedArgs, null, "-f", "--file-name");
      string itemName =
        CommandLine.GetArgument(parsedArgs, null, "-i", "--item-name");
      if(string.IsNullOrEmpty(bucketName) || (string.IsNullOrEmpty(fileName)))
        CommandLine.ErrorExit(
          "\nOne or more of the required arguments is missing or incorrect." +
          "\nRun the command with no arguments to see help.");
      if(!File.Exists(fileName))
        CommandLine.ErrorExit($"\nThe given file {fileName} doesn't exist.");
      if(string.IsNullOrEmpty(itemName))
        itemName = Path.GetFileName(fileName);

      // Create a customer master key (CMK) and store the result
      CreateKeyResponse createKeyResponse =
        await new AmazonKeyManagementServiceClient().CreateKeyAsync(new CreateKeyRequest());
      var kmsEncryptionContext = new Dictionary<string, string>();
      var kmsEncryptionMaterials = new EncryptionMaterialsV2(
        createKeyResponse.KeyMetadata.KeyId, KmsType.KmsContext, kmsEncryptionContext);

      // Create the object in the bucket, then display the content of the object
      var putObjectResponse =
        await CreateAndRetrieveObjectAsync(kmsEncryptionMaterials, bucketName, fileName, itemName);
      Stream stream = putObjectResponse.ResponseStream;
      StreamReader reader = new StreamReader(stream);
      Console.WriteLine(reader.ReadToEnd());
    }


    //
    // Method to create and encrypt an object in an S3 bucket
    static async Task<GetObjectResponse> CreateAndRetrieveObjectAsync(
      EncryptionMaterialsV2 materials, string bucketName,
      string fileName, string itemName)
    {
      // CryptoStorageMode.ObjectMetadata is required for KMS EncryptionMaterials
      var config = new AmazonS3CryptoConfigurationV2(SecurityProfile.V2AndLegacy)
      {
        StorageMode = CryptoStorageMode.ObjectMetadata
      };
      var s3EncClient = new AmazonS3EncryptionClientV2(config, materials);

      // Create, encrypt, and put the object
      await s3EncClient.PutObjectAsync(new PutObjectRequest
      {
        BucketName = bucketName,
        Key = itemName,
        ContentBody = File.ReadAllText(fileName)
      });

      // Get, decrypt, and return the object
      return await s3EncClient.GetObjectAsync(new GetObjectRequest
      {
        BucketName = bucketName,
        Key = itemName
      });
    }


    //
    // Command-line help
    private static void PrintHelp()
    {
      Console.WriteLine(
        "\nUsage: KmsS3Encryption -b <bucket-name> -f <file-name> [-i <item-name>]" +
        "\n  -b, --bucket-name: The name of an existing S3 bucket." +
        "\n  -f, --file-name: The name of a text file with content to encrypt and store in S3." +
        "\n  -i, --item-name: The name you want to use for the item." +
        "\n      If item-name isn't given, file-name will be used.");
    }

  }

  // = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
  // Class that represents a command line on the console or terminal.
  // (This is the same for all examples. When you have seen it once, you can ignore it.)
  static class CommandLine
  {
    //
    // Method to parse a command line of the form: "--key value" or "-k value".
    //
    // Parameters:
    // - args: The command-line arguments passed into the application by the system.
    //
    // Returns:
    // A Dictionary with string Keys and Values.
    //
    // If a key is found without a matching value, Dictionary.Value is set to the key
    //  (including the dashes).
    // If a value is found without a matching key, Dictionary.Key is set to "--NoKeyN",
    //  where "N" represents sequential numbers.
    public static Dictionary<string,string> Parse(string[] args)
    {
      var parsedArgs = new Dictionary<string,string>();
      int i = 0, n = 0;
      while(i < args.Length)
      {
        // If the first argument in this iteration starts with a dash it's an option.
        if(args[i].StartsWith("-"))
        {
          var key = args[i++];
          var value = key;

          // Check to see if there's a value that goes with this option?
          if((i < args.Length) && (!args[i].StartsWith("-"))) value = args[i++];
          parsedArgs.Add(key, value);
        }

        // If the first argument in this iteration doesn't start with a dash, it's a value
        else
        {
          parsedArgs.Add("--NoKey" + n.ToString(), args[i++]);
          n++;
        }
      }

      return parsedArgs;
    }

    //
    // Method to get an argument from the parsed command-line arguments
    //
    // Parameters:
    // - parsedArgs: The Dictionary object returned from the Parse() method (shown above).
    // - defaultValue: The default string to return if the specified key isn't in parsedArgs.
    // - keys: An array of keys to look for in parsedArgs.
    public static string GetArgument(
      Dictionary<string,string> parsedArgs, string defaultReturn, params string[] keys)
    {
      string retval = null;
      foreach(var key in keys)
        if(parsedArgs.TryGetValue(key, out retval)) break;
      return retval ?? defaultReturn;
    }

    //
    // Method to exit the application with an error.
    public static void ErrorExit(string msg, int code=1)
    {
      Console.WriteLine("\nError");
      Console.WriteLine(msg);
      Environment.Exit(code);
    }
  }

}
```

## Pertimbangan tambahan
<a name="kms-s3-additional"></a>
+ Anda dapat memeriksa hasil dari contoh ini. Untuk melakukannya, buka [konsol Amazon S3](https://console.aws.amazon.com/s3) dan buka ember yang Anda berikan ke aplikasi. Kemudian temukan objek baru, unduh, dan buka di editor teks.
+ Kelas [AmazonS3 EncryptionClient V2](https://aws.github.io/amazon-s3-encryption-client-dotnet/api/Amazon.Extensions.S3.Encryption.AmazonS3EncryptionClientV2.html) mengimplementasikan antarmuka yang sama dengan kelas standar. `AmazonS3Client` Ini membuatnya lebih mudah untuk mem-port kode Anda ke `AmazonS3EncryptionClientV2` kelas sehingga enkripsi dan dekripsi terjadi secara otomatis dan transparan di klien.
+ Salah satu keuntungan menggunakan AWS KMS kunci sebagai kunci utama Anda adalah Anda tidak perlu menyimpan dan mengelola kunci master Anda sendiri; ini dilakukan oleh AWS. Keuntungan kedua adalah bahwa `AmazonS3EncryptionClientV2` kelas interoperable dengan `AmazonS3EncryptionClientV2` kelas. AWS SDK untuk .NET AWS SDK untuk Java Ini berarti Anda dapat mengenkripsi dengan AWS SDK untuk Java dan mendekripsi dengan AWS SDK untuk .NET, dan sebaliknya.
**catatan**  
`AmazonS3EncryptionClientV2`Kelas AWS SDK untuk .NET mendukung kunci master KMS hanya ketika dijalankan dalam mode metadata. Mode file instruksi dari `AmazonS3EncryptionClientV2` kelas tidak AWS SDK untuk .NET kompatibel dengan `AmazonS3EncryptionClientV2` kelas file. AWS SDK untuk Java
+ Untuk informasi selengkapnya tentang enkripsi sisi klien dengan `AmazonS3EncryptionClientV2` kelas, dan cara kerja enkripsi amplop, lihat [Enkripsi Data Sisi Klien dengan dan Amazon AWS SDK untuk .NET S3](https://aws.amazon.com/blogs/developer/client-side-data-encryption-with-aws-sdk-for-net-and-amazon-s3/).