기계 번역으로 제공되는 번역입니다. 제공된 번역과 원본 영어의 내용이 상충하는 경우에는 영어 버전이 우선합니다.

# Amazon S3 액세스 권한 관리
<a name="examples-s3-access-permissions"></a>

Amazon S3 버킷 또는 객체에 대한 액세스 권한은 액세스 제어 목록(ACL)에 정의되어 있습니다. ACL은 버킷/객체의 소유자와 권한 부여 목록을 지정합니다. 각 권한 부여에는 사용자(또는 수혜자)와 버킷/객체에 대한 사용자의 액세스 권한(예: READ 또는 WRITE 권한)이 지정됩니다.

## 사전 조건
<a name="codeExamplePrereq"></a>

시작하기 전에 [AWS SDK for C\$1\$1사용 시작하기](getting-started.md)를 읽어보시기 바랍니다.

예제 코드를 다운로드하고 [코드 예제 시작하기](getting-started-code-examples.md)에 설명된 대로 솔루션을 빌드합니다.

예제를 실행하려면 코드에서 요청을 만드는 데 사용하는 사용자 프로필에 AWS (서비스 및 작업에 대한) 적절한 권한이 있어야 합니다. 자세한 내용은 자격 [AWS 증명 제공을](credentials.md) 참조하세요.

## 객체의 액세스 제어 목록 관리
<a name="manage-an-object-s-access-control-list"></a>

`S3Client` 메서드 `GetObjectAcl`를 직접적으로 호출하여 객체에 대한 액세스 제어 목록을 검색할 수 있습니다. 이 메서드는 객체와 버킷의 이름을 허용합니다. 반환 값에는 ACL의 `Owner` 및 `Grants` 목록이 포함됩니다.

```
bool AwsDoc::S3::getObjectAcl(const Aws::String &bucketName,
                              const Aws::String &objectKey,
                              const Aws::S3::S3ClientConfiguration &clientConfig) {
    Aws::S3::S3Client s3Client(clientConfig);

    Aws::S3::Model::GetObjectAclRequest request;
    request.SetBucket(bucketName);
    request.SetKey(objectKey);

    Aws::S3::Model::GetObjectAclOutcome outcome =
            s3Client.GetObjectAcl(request);

    if (!outcome.IsSuccess()) {
        const Aws::S3::S3Error &err = outcome.GetError();
        std::cerr << "Error: getObjectAcl: "
                  << err.GetExceptionName() << ": " << err.GetMessage() << std::endl;
    } else {
        Aws::Vector<Aws::S3::Model::Grant> grants =
                outcome.GetResult().GetGrants();

        for (auto it = grants.begin(); it != grants.end(); it++) {
            std::cout << "For object " << objectKey << ": "
                      << std::endl << std::endl;

            Aws::S3::Model::Grant grant = *it;
            Aws::S3::Model::Grantee grantee = grant.GetGrantee();

            if (grantee.TypeHasBeenSet()) {
                std::cout << "Type:          "
                          << getGranteeTypeString(grantee.GetType()) << std::endl;
            }

            if (grantee.DisplayNameHasBeenSet()) {
                std::cout << "Display name:  "
                          << grantee.GetDisplayName() << std::endl;
            }

            if (grantee.EmailAddressHasBeenSet()) {
                std::cout << "Email address: "
                          << grantee.GetEmailAddress() << std::endl;
            }

            if (grantee.IDHasBeenSet()) {
                std::cout << "ID:            "
                          << grantee.GetID() << std::endl;
            }

            if (grantee.URIHasBeenSet()) {
                std::cout << "URI:           "
                          << grantee.GetURI() << std::endl;
            }

            std::cout << "Permission:    " <<
                      getPermissionString(grant.GetPermission()) <<
                      std::endl << std::endl;
        }
    }

    return outcome.IsSuccess();
}

//! Routine which converts a built-in type enumeration to a human-readable string.
/*!
 \param type: Type enumeration.
 \return String: Human-readable string
*/
Aws::String getGranteeTypeString(const Aws::S3::Model::Type &type) {
    switch (type) {
        case Aws::S3::Model::Type::AmazonCustomerByEmail:
            return "Email address of an AWS account";
        case Aws::S3::Model::Type::CanonicalUser:
            return "Canonical user ID of an AWS account";
        case Aws::S3::Model::Type::Group:
            return "Predefined Amazon S3 group";
        case Aws::S3::Model::Type::NOT_SET:
            return "Not set";
        default:
            return "Type unknown";
    }
}

//! Routine which converts a built-in type enumeration to a human-readable string.
/*!
 \param permission: Permission enumeration.
 \return String: Human-readable string
*/
Aws::String getPermissionString(const Aws::S3::Model::Permission &permission) {
    switch (permission) {
        case Aws::S3::Model::Permission::FULL_CONTROL:
            return "Can read this object's data and its metadata, "
                   "and read/write this object's permissions";
        case Aws::S3::Model::Permission::NOT_SET:
            return "Permission not set";
        case Aws::S3::Model::Permission::READ:
            return "Can read this object's data and its metadata";
        case Aws::S3::Model::Permission::READ_ACP:
            return "Can read this object's permissions";
            // case Aws::S3::Model::Permission::WRITE // Not applicable.
        case Aws::S3::Model::Permission::WRITE_ACP:
            return "Can write this object's permissions";
        default:
            return "Permission unknown";
    }
}
```

ACL은 새 ACL을 생성하거나 현재 ACL에 지정된 권한 부여를 변경하여 수정할 수 있습니다. 업데이트된 ACL은 `PutObjectAcl` 메서드에 전달하여 새로운 현재 ACL이 됩니다.

다음 코드는 `GetObjectAcl`로 검색된 ACL을 사용하고 여기에 새 권한 부여를 추가합니다. 사용자 또는 피부여자에게 객체에 대한 READ 권한이 부여됩니다. 수정된 ACL은 `PutObjectAcl`로 전달되어 새로운 현재 ACL이 됩니다.

```
bool AwsDoc::S3::putObjectAcl(const Aws::String &bucketName, const Aws::String &objectKey, const Aws::String &ownerID,
                              const Aws::String &granteePermission, const Aws::String &granteeType,
                              const Aws::String &granteeID, const Aws::String &granteeEmailAddress,
                              const Aws::String &granteeURI, const Aws::S3::S3ClientConfiguration &clientConfig) {
    Aws::S3::S3Client s3Client(clientConfig);

    Aws::S3::Model::Owner owner;
    owner.SetID(ownerID);

    Aws::S3::Model::Grantee grantee;
    grantee.SetType(setGranteeType(granteeType));

    if (!granteeEmailAddress.empty()) {
        grantee.SetEmailAddress(granteeEmailAddress);
    }

    if (!granteeID.empty()) {
        grantee.SetID(granteeID);
    }

    if (!granteeURI.empty()) {
        grantee.SetURI(granteeURI);
    }

    Aws::S3::Model::Grant grant;
    grant.SetGrantee(grantee);
    grant.SetPermission(setGranteePermission(granteePermission));

    Aws::Vector<Aws::S3::Model::Grant> grants;
    grants.push_back(grant);

    Aws::S3::Model::AccessControlPolicy acp;
    acp.SetOwner(owner);
    acp.SetGrants(grants);

    Aws::S3::Model::PutObjectAclRequest request;
    request.SetAccessControlPolicy(acp);
    request.SetBucket(bucketName);
    request.SetKey(objectKey);

    Aws::S3::Model::PutObjectAclOutcome outcome =
            s3Client.PutObjectAcl(request);

    if (!outcome.IsSuccess()) {
        auto error = outcome.GetError();
        std::cerr << "Error: putObjectAcl: " << error.GetExceptionName()
                  << " - " << error.GetMessage() << std::endl;
    } else {
        std::cout << "Successfully added an ACL to the object '" << objectKey
                  << "' in the bucket '" << bucketName << "'." << std::endl;
    }

    return outcome.IsSuccess();
}

//! Routine which converts a human-readable string to a built-in type enumeration.
/*!
 \param access: Human readable string.
 \return Permission: Permission enumeration.
*/
Aws::S3::Model::Permission setGranteePermission(const Aws::String &access) {
    if (access == "FULL_CONTROL")
        return Aws::S3::Model::Permission::FULL_CONTROL;
    if (access == "WRITE")
        return Aws::S3::Model::Permission::WRITE;
    if (access == "READ")
        return Aws::S3::Model::Permission::READ;
    if (access == "WRITE_ACP")
        return Aws::S3::Model::Permission::WRITE_ACP;
    if (access == "READ_ACP")
        return Aws::S3::Model::Permission::READ_ACP;
    return Aws::S3::Model::Permission::NOT_SET;
}

//! Routine which converts a human-readable string to a built-in type enumeration.
/*!
 \param type: Human readable string.
 \return Type: Type enumeration.
*/
Aws::S3::Model::Type setGranteeType(const Aws::String &type) {
    if (type == "Amazon customer by email")
        return Aws::S3::Model::Type::AmazonCustomerByEmail;
    if (type == "Canonical user")
        return Aws::S3::Model::Type::CanonicalUser;
    if (type == "Group")
        return Aws::S3::Model::Type::Group;
    return Aws::S3::Model::Type::NOT_SET;
}
```

[전체 예제](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/s3/get_put_object_acl.cpp)는 Github에서 확인하세요.

## 버킷의 액세스 제어 목록 관리
<a name="manage-a-bucket-s-access-control-list"></a>

대부분의 경우 버킷의 액세스 권한을 설정할 때 선호하는 방법은 버킷 정책을 정의하는 것입니다. 그러나 버킷은 액세스 제어 목록을 사용하고자 하는 사용자를 위해 이를 지원하기도 합니다.

버킷에 대한 액세스 제어 목록 관리는 객체에 사용되는 것과 동일합니다. `GetBucketAcl` 메서드는 버킷의 현재 ACL을 검색하고 `PutBucketAcl` 메서드는 버킷에 새 ACL을 적용합니다.

다음 코드는 버킷 ACL을 가져오고 설정하는 방법을 보여줍니다.

```
//! Routine which demonstrates setting the ACL for an S3 bucket.
/*!
  \param bucketName: Name of a bucket.
  \param ownerID: The canonical ID of the bucket owner.
   See https://docs.aws.amazon.com/AmazonS3/latest/userguide/finding-canonical-user-id.html for more information.
  \param granteePermission: The access level to enable for the grantee.
  \param granteeType: The type of grantee.
  \param granteeID: The canonical ID of the grantee.
  \param granteeEmailAddress: The email address associated with the grantee's AWS account.
  \param granteeURI: The URI of a built-in access group.
  \param clientConfig: Aws client configuration.
  \return bool: Function succeeded.
*/

bool AwsDoc::S3::getPutBucketAcl(const Aws::String &bucketName,
                                 const Aws::String &ownerID,
                                 const Aws::String &granteePermission,
                                 const Aws::String &granteeType,
                                 const Aws::String &granteeID,
                                 const Aws::String &granteeEmailAddress,
                                 const Aws::String &granteeURI,
                                 const Aws::S3::S3ClientConfiguration &clientConfig) {
    bool result = ::putBucketAcl(bucketName, ownerID, granteePermission, granteeType,
                                 granteeID,
                                 granteeEmailAddress,
                                 granteeURI,
                                 clientConfig);
    if (result) {
        result = ::getBucketAcl(bucketName, clientConfig);
    }

    return result;
}

//! Routine which demonstrates setting the ACL for an S3 bucket.
/*!
  \param bucketName: Name of from bucket.
  \param ownerID: The canonical ID of the bucket owner.
   See https://docs.aws.amazon.com/AmazonS3/latest/userguide/finding-canonical-user-id.html for more information.
  \param granteePermission: The access level to enable for the grantee.
  \param granteeType: The type of grantee.
  \param granteeID: The canonical ID of the grantee.
  \param granteeEmailAddress: The email address associated with the grantee's AWS account.
  \param granteeURI: The URI of a built-in access group.
  \param clientConfig: Aws client configuration.
  \return bool: Function succeeded.
*/

bool putBucketAcl(const Aws::String &bucketName,
                  const Aws::String &ownerID,
                  const Aws::String &granteePermission,
                  const Aws::String &granteeType,
                  const Aws::String &granteeID,
                  const Aws::String &granteeEmailAddress,
                  const Aws::String &granteeURI,
                  const Aws::S3::S3ClientConfiguration &clientConfig) {
    Aws::S3::S3Client s3Client(clientConfig);

    Aws::S3::Model::Owner owner;
    owner.SetID(ownerID);

    Aws::S3::Model::Grantee grantee;
    grantee.SetType(setGranteeType(granteeType));

    if (!granteeEmailAddress.empty()) {
        grantee.SetEmailAddress(granteeEmailAddress);
    }

    if (!granteeID.empty()) {
        grantee.SetID(granteeID);
    }

    if (!granteeURI.empty()) {
        grantee.SetURI(granteeURI);
    }

    Aws::S3::Model::Grant grant;
    grant.SetGrantee(grantee);
    grant.SetPermission(setGranteePermission(granteePermission));

    Aws::Vector<Aws::S3::Model::Grant> grants;
    grants.push_back(grant);

    Aws::S3::Model::AccessControlPolicy acp;
    acp.SetOwner(owner);
    acp.SetGrants(grants);

    Aws::S3::Model::PutBucketAclRequest request;
    request.SetAccessControlPolicy(acp);
    request.SetBucket(bucketName);

    Aws::S3::Model::PutBucketAclOutcome outcome =
            s3Client.PutBucketAcl(request);

    if (!outcome.IsSuccess()) {
        const Aws::S3::S3Error &error = outcome.GetError();

        std::cerr << "Error: putBucketAcl: " << error.GetExceptionName()
                  << " - " << error.GetMessage() << std::endl;
    } else {
        std::cout << "Successfully added an ACL to the bucket '" << bucketName
                  << "'." << std::endl;
    }

    return outcome.IsSuccess();
}

//! Routine which demonstrates getting the ACL for an S3 bucket.
/*!
  \param bucketName: Name of the s3 bucket.
  \param clientConfig: Aws client configuration.
  \return bool: Function succeeded.
*/
bool getBucketAcl(const Aws::String &bucketName,
                  const Aws::S3::S3ClientConfiguration &clientConfig) {
    Aws::S3::S3Client s3Client(clientConfig);

    Aws::S3::Model::GetBucketAclRequest request;
    request.SetBucket(bucketName);

    Aws::S3::Model::GetBucketAclOutcome outcome =
            s3Client.GetBucketAcl(request);

    if (!outcome.IsSuccess()) {
        const Aws::S3::S3Error &err = outcome.GetError();
        std::cerr << "Error: getBucketAcl: "
                  << err.GetExceptionName() << ": " << err.GetMessage() << std::endl;
    } else {
        const Aws::Vector<Aws::S3::Model::Grant> &grants =
                outcome.GetResult().GetGrants();

        for (const Aws::S3::Model::Grant &grant: grants) {
            const Aws::S3::Model::Grantee &grantee = grant.GetGrantee();

            std::cout << "For bucket " << bucketName << ": "
                      << std::endl << std::endl;

            if (grantee.TypeHasBeenSet()) {
                std::cout << "Type:          "
                          << getGranteeTypeString(grantee.GetType()) << std::endl;
            }

            if (grantee.DisplayNameHasBeenSet()) {
                std::cout << "Display name:  "
                          << grantee.GetDisplayName() << std::endl;
            }

            if (grantee.EmailAddressHasBeenSet()) {
                std::cout << "Email address: "
                          << grantee.GetEmailAddress() << std::endl;
            }

            if (grantee.IDHasBeenSet()) {
                std::cout << "ID:            "
                          << grantee.GetID() << std::endl;
            }

            if (grantee.URIHasBeenSet()) {
                std::cout << "URI:           "
                          << grantee.GetURI() << std::endl;
            }

            std::cout << "Permission:    " <<
                      getPermissionString(grant.GetPermission()) <<
                      std::endl << std::endl;
        }
    }

    return outcome.IsSuccess();
}

//! Routine which converts a built-in type enumeration to a human-readable string.
/*!
 \param permission: Permission enumeration.
 \return String: Human-readable string.
*/

Aws::String getPermissionString(const Aws::S3::Model::Permission &permission) {
    switch (permission) {
        case Aws::S3::Model::Permission::FULL_CONTROL:
            return "Can list objects in this bucket, create/overwrite/delete "
                   "objects in this bucket, and read/write this "
                   "bucket's permissions";
        case Aws::S3::Model::Permission::NOT_SET:
            return "Permission not set";
        case Aws::S3::Model::Permission::READ:
            return "Can list objects in this bucket";
        case Aws::S3::Model::Permission::READ_ACP:
            return "Can read this bucket's permissions";
        case Aws::S3::Model::Permission::WRITE:
            return "Can create, overwrite, and delete objects in this bucket";
        case Aws::S3::Model::Permission::WRITE_ACP:
            return "Can write this bucket's permissions";
        default:
            return "Permission unknown";
    }
}

//! Routine which converts a human-readable string to a built-in type enumeration
/*!
 \param access: Human readable string.
 \return Permission: Permission enumeration.
*/
Aws::S3::Model::Permission setGranteePermission(const Aws::String &access) {
    if (access == "FULL_CONTROL")
        return Aws::S3::Model::Permission::FULL_CONTROL;
    if (access == "WRITE")
        return Aws::S3::Model::Permission::WRITE;
    if (access == "READ")
        return Aws::S3::Model::Permission::READ;
    if (access == "WRITE_ACP")
        return Aws::S3::Model::Permission::WRITE_ACP;
    if (access == "READ_ACP")
        return Aws::S3::Model::Permission::READ_ACP;
    return Aws::S3::Model::Permission::NOT_SET;
}

//! Routine which converts a built-in type enumeration to a human-readable string.
/*!
 \param type: Type enumeration.
 \return bool: Human-readable string.
*/
Aws::String getGranteeTypeString(const Aws::S3::Model::Type &type) {
    switch (type) {
        case Aws::S3::Model::Type::AmazonCustomerByEmail:
            return "Email address of an AWS account";
        case Aws::S3::Model::Type::CanonicalUser:
            return "Canonical user ID of an AWS account";
        case Aws::S3::Model::Type::Group:
            return "Predefined Amazon S3 group";
        case Aws::S3::Model::Type::NOT_SET:
            return "Not set";
        default:
            return "Type unknown";
    }
}

Aws::S3::Model::Type setGranteeType(const Aws::String &type) {
    if (type == "Amazon customer by email")
        return Aws::S3::Model::Type::AmazonCustomerByEmail;
    if (type == "Canonical user")
        return Aws::S3::Model::Type::CanonicalUser;
    if (type == "Group")
        return Aws::S3::Model::Type::Group;
    return Aws::S3::Model::Type::NOT_SET;
}
```

[전체 예제](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/s3/get_put_bucket_acl.cpp)는 Github에서 확인하세요.