This example uses encryption with AWS KMS keys (SSE-KMS). Select the AWS KMS key that you want to use for folder encryption. If the owner (account ID) of the source bucket is the same account used to configure the Terraform AWS Provider, the S3 server-side encryption configuration resource should be imported using the bucket e.g., $ terraform import aws_s3_bucket_server_side_encryption_configuration.example bucket-name. Disabling server-side encryption of S3 buckets is security-sensitive. If you don't specify a customer managed key at configuration, Amazon S3 automatically creates 1. This will remove default encryption from the S3 bucket. From the AWS console homepage, search for S3 in the services search bar, and click on the S3 service in the search results. I've pushed a better fix for it at #15234 so hopefully that gets a bit of traction soon. Well occasionally send you account related emails. Guide. This doesn't change the way the objects are accessed, as long as the user has the necessary permissions . This parameter is allowed if SSEAlgorithm is aws:kms. Properties. resource "aws_s3_bucket" "example" {bucket = "yournamehere" # . Closed . The fix for this has been merged and will release with version 3.10.0 of the Terraform AWS Provider, later this week. Thanks! Server-side encryption algorithm to use for the default encryption. From the top menu, select the Properties tab and scroll down to the Default encryption section. 5. All rights reserved. Create your own custom remediation actions using, You must have AWS Config enabled in your AWS account. When I re-apply the plan, the KMS encryption of the object changes to the default alias/aws/s3 key. Enabling server-side encryption (SSE) on S3 buckets at the object level protects data at rest and helps prevent the breach of sensitive information assets. If a resource is still non-compliant after auto remediation, you can set the rule to try auto remediation again. S3 Bucket Keys can be configured through the S3 Management Console, SDK, or API. args BucketServerSideEncryptionConfigurationV2Args The arguments to resource properties. For more information, see Using encryption for cross-account operations. arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab. <div class="navbar header-navbar"> <div class="container"> <div class="navbar-brand"> <a href="/" id="ember34" class="navbar-brand-link active ember-view"> <span id . Each parameter has either a static value or a dynamic value. For example, there are AWS Config rules that check whether or not your Amazon S3 buckets have logging enabled or your IAM users have an MFA device enabled. There is no additional charge for SSE-S3, which makes it an attractive offering. :return: None """ s3_client . Follow the principle of least privilege. } } versioning { enabled = true } } but when I . I think the fix here is to set Computed: true for kms_key_id, but I am not familiar enough with Terraform to understand the other ramifications of such a change. Too many server_side_encryption_configuration blocks on line 0: (source code not available) No more than 1 "server_side_encryption_configuration" blocks are allowed . aws_s3_bucket resources/data sources Reference: #9564. bflad . Using ACL policy grants. 2022, Amazon Web Services, Inc. or its affiliates. The syntax to copy the data to and from the S3 bucket is as below. Setting the BucketKeyEnabled element to true causes Amazon S3 to use an S3 Bucket Key. https . isn't it supported? put-bucket-encryption Description This action uses the encryptionsubresource to configure default encryption and Amazon S3 Bucket Key for an existing bucket. With Auto Remediation feature of AWS Config rules, the remediation action can be executed automatically when a resource is found non-compliant. This has been released in version 3.10.0 of the Terraform AWS provider. Sign in to the AWS Management Console and open the. AWS Config now supports the ability to use an AWS Key Management Service (KMS) key or alias Amazon Resource Name (ARN) that you provide, to encrypt the data delivered to your Amazon Simple Storage Service (S3) bucket. For more information, see Using SSE-S3 in the Amazon S3 User Guide. After the initial creation, the Read function is called in the resource to read the resource state. def delete_bucket_encryption (): """ This function deletes encryption policy for this bucket. All rights reserved. This remediation action disables an S3 buckets public Write and Read access via Block Public Access settings. Navigate to S3. 4. Keys, Amazon S3 Bucket ServerSideEncryptionByDefault. Until now, remediation actions had to be executed manually for each noncompliant resource. If you do not choose a specific resource ID parameter from the drop-down list, you can enter values for each key. Make sure you have the following prerequisites before following the solution in this post: Use the following steps to set up Auto Remediation for each of the four AWS Config rules. S3 bucket names need to be unique, and they can't contain spaces or uppercase letters. The text was updated successfully, but these errors were encountered: Looks like this is a duplicate of #10200. This cause the s3:PutObject request to contain only the s3:x-amz-server-side-encryption header, but not contain the s3:x-amz-server-side-encryption-aws-kms-key-id header. Using AWS Console. Successfully merging a pull request may close this issue. An AWS S3 bucket can be protected from public read and write using AWS Config rules s3-bucket-public-read-prohibited and s3-bucket-public-write-prohibited respectively. If you do not provide AWS Config with a KMS key or alias ARN, then AWS Config will default to encrypting the delivered data with AES-256 encryption. You can use 6. Option C is incorrect because server-side encryption does not help with the encryption in transit. For more At this point in time, the server_side_encryption (here) and kms_key_id (here) values are persisted in the terraform.tfstate file. Workloads that access millions or billions of objects encrypted with SSE-KMS can generate large request volumes to KMS. S3 bucket server-side encryption is now enabled automatically using the AWS Config Auto Remediation feature. It uses a unique key to encrypt each object on the server side using AES-256. To require that a particular AWS KMS key be used to encrypt the objects in a bucket, you can use the s3:x-amz-server-side-encryption-aws-kms-key-id condition key. By default, AWS Config delivers configuration history and snapshot files to your S3 bucket and encrypts the data at rest using S3 AES-256 server-side encryption, SSE-S3. If selected, at runtime that parameter is substituted with the ID of the resource to be remediated. Support for KMS encryption on S3 buckets used by AWS Config is available at no additional cost in all commercial AWS Regions and AWS GovCloud (US). Keys in the AWS Key Management Service Developer To make sure your files and Amazon S3 buckets are secure, follow these best practices: Restrict access to your S3 resources: When using AWS, restrict access to your resources to the people that absolutely need it. Dynamic block in S3 resource fails on: Too many server_side_encryption_configuration blocks #9564. (Account A is the principal that created the files in account B's bucket). Use the following steps to auto-remediate an S3 bucket whose logging is not enabled: The s3-bucket-server-side-encryption-enabled AWS Config rule checks that your S3 bucket either has S3 default encryption enabled or that the S3 bucket policy explicitly denies put-object requests without server side encryption. Any objects already encrypted will stay encrypted even if we disable default bucket level encprytion. For more information, see. (Optional): While setting up remediation action, if you want to pass the resource ID of non-compliant resources to the remediation action, choose Resource ID parameter. For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template for triage. aws_ s3_ bucket_ replication_ configuration aws_ s3_ bucket_ request_ payment_ configuration aws_ s3_ bucket_ server_ side_ encryption_ configuration This ultimately causes AWS to use the default alias/aws/s3 to encrypt the file, instead of the one specified by the default server side configuration on the S3 bucket. Amazon S3 server-side encryption uses one of the strongest block ciphers available to encrypt your data, 256-bit Advanced Encryption Standard (AES-256). AWS S3 also encrypts that unique key using a root or master key, adding an extra layer of . Click here to return to Amazon Web Services homepage, Support for KMS encryption on S3 buckets used by AWS Config. S3 uses this bucket key to create unique data keys for objects in a bucket, avoiding the need for additional KMS requests to complete encryption operations. The acl and grant arguments are read-only as of version 4.0 of the Terraform AWS Provider. Already on GitHub? It will create an S3 bucket in the currently set default AWS region with . I want to create a S3 and make it encryption at rest with AES256, but terraform complain that: * aws_s3_bucket.s3: : invalid or unknown key: server_side_encryption_configuration (see my code complained by terraform below) What is wrong with server_side_encryption_configuration? This is not always feasible if you have many noncompliant resources for which you want to execute remediation actions. With S3 Bucket Keys, instead of an individual KMS key for each KMS encrypted object, a bucket-level key is generated by KMS. to your account. It can also evaluate those AWS resources for compliance. The following example creates a bucket with server-side bucket encryption configured. privacy statement. From among the many encryption and security options for S3 buckets, this script has an opinionated function. opts CustomResourceOptions Bag of options to control resource's behavior. The objects delivered to the S3 bucket will be encrypted using server-side encryption with KMS CMKs. You can also use this feature to maintain compliance of other AWS resources using existing SSM documents or custom SSM documents. You can specify the key ID or the Amazon Resource Name (ARN) of the CMK. Server-side encryption (SSE) encrypts an object (not the metadata) as it is written to disk (where the S3 bucket resides) and decrypts it as it is read from disk. After fiddling around, I think that this is caused by the Computed flag (here) for server_side_encryption. If a 3. For pricing details on AWS Config rules, visit the AWS Config pricing page. The AWS managed key (aws/s3) is used when a AWS KMS key Amazon Resource Name (ARN) or alias is not provided at request time, nor via the bucket's default encryption configuration. This example uses encryption with AWS KMS keys (SSE-KMS). By default, Amazon S3 uses this KMS key for SSE-KMS. In this post, you saw how to auto-remediate non-compliant S3 resources using the AWS Config auto remediation feature for AWS Config rules. To use the Amazon Web Services Documentation, Javascript must be enabled. Have a question about this project? Description . SSE encryption of S3 using Terraform. By default, S3 Bucket Key is not enabled. To enable or disable server-side encryption, choose Enable or Disable. be applied. Creates an S3 bucket using either SSE-S3 or SSE-KMS encryption and makes the bucket non-public. Make sure 'Server-side encryption' is set to 'Enable' 6. All rights reserved. resource "aws_s3_bucket_logging" "example" {bucket = aws_s3_bucket.example.id target_bucket = aws_s3_bucket.log_bucket.id target_prefix = "log/"} By default, AWS Config delivers configuration history and snapshot files to your S3 bucket and encrypts the data at rest using S3 AES-256 server-side encryption, SSE-S3. Configure your AWS KMS key 8. Because the initial call is creating a new resource, the Create function gets called in the resource. By clicking Sign up for GitHub, you agree to our terms of service and 2022, Amazon Web Services, Inc. or its affiliates. I'm going to lock this issue because it has been closed for 30 days . Note: The key named aws/s3 is a default key managed by AWS KMS. To get started, create a KMS key and configure it with the permission to GenerateDataKey and Decrypt. See the aws_s3_bucket_server_side_encryption_configuration resource for configuration details. If Server-side encryption is set to AWS-KMS master-key (SSE-KMS), but the KMS master key ARN of the configured CMK is arn:aws:kms:us-east-1:<aws-account-id>:alias/aws/s3 (i.e. In this post, you learn how to use the new AWS Config Auto Remediation feature on a noncompliant S3 bucket to ensure it is remediated automatically. Sign in Thanks! When running the initial plan, everything goes as expected and my object is created in the S3 bucket encrypted with the default KMS key specified in the bucket configuration. Use CMK (Customer Master key) in AWS KMS (SSE-KMS) In this, key material and the key will be generated in AWS KMS service to encrypt the objects . Click the linked S3 bucket name you intend to check its configuration ( Similarly to what we did in the Audit section). Describes the default server-side encryption to apply to new objects in the bucket. When re-applying the plan, I expect that Terraform would continue to honor the default encryption specified in the S3 bucket. If you've got a moment, please tell us what we did right so we can do more of it. This ultimately causes AWS to use the default alias/aws/s3 to encrypt the file, instead of the one specified by the default server side configuration on the S3 bucket. You can then provide the KMS key to AWS Config by calling the PutDeliveryChannel API with your S3 KMS key, ARN, or alias ARN. I am terraforming an S3 bucket that looks like this: resource "aws_s3_bucket" "my_bucket" { bucket = "my_bucket" acl = "log-delivery-write" server_side_encryption_configuration { rule { apply_server_side_encryption_by_default { sse_algorithm = "AES256" } } } versioning { enabled = true } } . } The s3-bucket-logging-enabled AWS Config rule checks whether logging is enabled for your S3 buckets. Option B is incorrect because SSE-S3 is a server-side encryption method instead of the client-side. Javascript is disabled or is unavailable in your browser. We notice that this flag is not set for kms_key_id ( here ). Example Usage Create a BucketServerSideEncryptionConfigurationV2 Resource name string The unique name of the resource. Use server-side encryption so that Amazon S3 manages encryption and decryption for you. Please refer to your browser's Help pages for instructions. resource/aws_s3_bucket_object: Ignore changes due to default bucket e, version 3.10.0 of the Terraform AWS provider, Terraform documentation on provider versioning, Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request, If you are interested in working on this issue or have submitted a pull request, please leave a comment. Choose Edit server-side encryption. Thanks for letting us know this page needs work. the Amazon S3 API Reference. Hi there, Thank you for opening an issue. The cp command is used to copy the data from the local system to the S3 bucket and vice versa using AWS CLI. Under Default encryption, choose Edit. S3 bucket server-side encryption configuration can be imported in one of two ways. other configuration .} If you choose a resource ID parameter from the drop-down list, you can enter values for all the other keys except the selected resource ID parameter. The problem is that for whatever reason, the state that was read for server_side_encryption somehow makes it into the target configuration, whereas kms_key_id does not. Default encryption for a bucket can use server-side encryption with Amazon S3-managed keys (SSE-S3) or customer managed keys (SSE-KMS). While I do not have intimate knowledge of what the computed flag does, I believe it signals to Terraform that this property should use the value from the state in preference to a value provided by the Terraform plan itself. Amazon S3 Bucket Keys reduce the request costs of Amazon S3 server-side encryption (SSE) with AWS Key Management Service (KMS) by up to 99% by decreasing the request traffic from S3 to KMS. There are no additional fees for using server-side encryption with Amazon S3-managed keys (SSE-S3). The client doesn't directly access the encryption key or use it to encrypt and decrypt your data manually. For more information on how to protect S3 data using encryption . You can use server-side encryption with S3-managed keys (SSE-S3) by modifying the Amazon S3 Bucket ServerSideEncryptionByDefault property to specify AES256 for SSEAlgorithm . Click here to return to Amazon Web Services homepage, Amazon S3 Bucket Keys reduce the costs of Server-Side Encryption with AWS Key Management Service (SSE-KMS). To learn more about S3 Bucket Keys visit SSE-KMS documentation. Please note that we try to keep the Terraform issue tracker reserved for bug reports and feature requests. We're sorry we let you down. A confirmation that it executed the remediation action shows in the Action status column. Log in to the Management Console and access the S3 dashboard. Choose the remediation action you want to associate from a pre populated list. information, see PUT Bucket encryption in Select Enable for Enabling Server-side encryption. Objects can be encrypted with S3 Managed Keys (SSE-S3), KMS Managed Keys (SSE-KMS), or Customer Provided Keys (SSE-C). As an additional safeguard, it encrypts the key itself with a key that it rotates regularly. Amazon offers three ways to deploy server-side encryption: Amazon S3-Managed Keys (SSE-S3) - Amazon encrypts each object with a unique 256-bit Advanced Encryption Standard (AES-256) key, then encrypts that key with a frequently rotating root key. resource "aws_s3_bucket" "log_bucket" {bucket = "example-log-bucket" # . This change only affects new objects uploaded to that bucket. With a few clicks in AWS Management Console and no changes to your client applications, you can configure your buckets to use an S3 Bucket Key for KMS-based encryption on new objects. For general usage questions, please see: https:/. Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab, Key ARN: aws_s3_bucket_object fails if using default server side encryption. Provides a S3 bucket server-side encryption configuration resource. She is passionate about building innovative solutions using AWS services to help customers achieve their business objectives. For more Amazon S3 Bucket Keys are available at no additional cost in all commercial AWS Regions, including the AWS GovCloud, the AWS China (Beijing) Region, operated by Sinnet, and the AWS China (Ningxia) Region, operated by NWCD. ubuntu@ubuntu :~$ aws s3 cp <local path> \. AWS Config keeps track of the configuration of your AWS resources and their relationships to your other resources. The AWS Config Auto Remediation feature automatically remediates non-compliant resources evaluated by AWS Config rules. When you copy files from one S3 bucket in account A using credentials of account A to a bucket in account B, the owner of the files in the destination bucket will be account A. For more information on how to create and configure AWS Key Management Service (AWS KMS), see the AWS Key Management Service Documentation. This results in reduction of request traffic from S3 to KMS, allowing you to access encrypted objects in S3 at a fraction of the previous cost. Amazon S3 Bucket Keys reduce the request costs of Amazon S3 server-side encryption (SSE) with AWS Key Management Service (KMS) by up to 99% by decreasing the request traffic from S3 to KMS. We notice that this flag is not set for kms_key_id (here). Thanks to @mattburgess for the implementation. 4. This helps our maintainers find and focus on the active issues. 7. Option D is incorrect because bucket policy should be used instead of bucket ACL. To enable server-side encryption using an Amazon S3-managed key, under Encryption key type, choose Amazon S3 key (SSE-S3). 2. are using encryption with cross-account operations, you must use a fully qualified CMK ARN. If you've got a moment, please tell us how we can make the documentation better. Server-side encryption has the following three options: Use Amazon S3-managed keys (SSE-S3) In this, the key material and the key will be provided by AWS itself to encrypt the objects in the S3 bucket. To declare this entity in your AWS CloudFormation template, use the following syntax: KMS key ID to use for the default encryption. Specifies whether Amazon S3 should use an S3 Bucket Key with server-side encryption using KMS (SSE-KMS) for new objects in the bucket. It can also pose risks if these resources remain without remediation for an extended amount of time. Supported browsers are Chrome, Firefox, Edge, and Safari. information, see Using Symmetric and Asymmetric It can also be used to copy the data from one source S3 bucket to another destination S3 bucket. The following example creates a bucket with server-side bucket encryption configured. other configuration .} This service uses rules that can be configured to evaluate AWS resources against desired configurations. Using encryption for cross-account operations, Using Symmetric and Asymmetric Sign up for a free GitHub account to open an issue and contact its maintainers and the community. AWS support for Internet Explorer ends on 07/31/2022. For more details, see Remediating Non-compliant AWS Resources by AWS Config Rules. At this point, it calls again the resourceAwsS3BucketObjectPut (here) function to create to resource. AES256 for SSEAlgorithm. She enjoys spending time with family and friends, playing board games and hiking. AWS support for Internet Explorer ends on 07/31/2022. If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. For more information about AWS Config, see the AWS Config webpage. This allows the default configuration on the bucket to kick in and all is well. Harshitha Putta is an Associate Consultant with AWS Professional Services in Seattle, WA. Click here to return to Amazon Web Services homepage, Remediating Non-compliant AWS Resources by AWS Config Rules. Enable these AWS Config rules as discussed in the above two scenarios and enable auto remediation feature with existing SSM Document remediation action AWS-DisableS3BucketPublicReadWrite. Choose Properties. If you're uploading or accessing S3 objects using AWS Identity and Access Management (IAM) principals that are in the same AWS account as your KMS key, you can use the AWS managed key (aws/s3). See the aws_s3_bucket . You signed in with another tab or window. Supported browsers are Chrome, Firefox, Edge, and Safari. This occurs because the s3:x-amz-server-side-encryption header is set to aws:kms, but the s3:x-amz-server-side-encryption-aws-kms-key-id is omitted on subsequent calls to the s3:PutObject API. . the default key managed by the KMS service for Amazon S3), the Server-Side Encryption (SSE) configuration for the selected S3 bucket is not compliant. Create a new bucket. 2. The server_side_encryption_configuration argument is read-only as of version 4.0 of the Terraform AWS Provider. However, if you an AWS KMS key in your AWS account the first time that you add an object encrypted On the next apply, since the original Terraform plan does not specify either server_side_encryption or kms_key_id, it detects a change (here). PUT Object request doesn't specify any server-side encryption, this default encryption will The noncompliant resources are remediated using the remediation action associated to the AWS Config rule. You can associate remediation actions with AWS Config rules and choose to execute them automatically to address non-compliant resources without manual intervention. AWS PowerShell script to create, secure and encrypt a new S3 bucket. AWS Config rules use AWS Lambda functions to perform the compliance evaluations, and the Lambda functions return the compliance status of the evaluated resources as compliant or noncompliant. server-side encryption with S3-managed keys (SSE-S3) by modifying the Amazon S3 Bucket ServerSideEncryptionByDefault property to specify Choose Encryption key type for your AWS Key Management Service key (SSE-KMS). With this release, if you provide AWS Config with your KMS key or alias ARN, AWS Config will use that KMS key instead of using AES-256 encryption. Set 'Encryption key type' to 'AWS Key Management Service key' 7. In the Buckets list, choose the name of the bucket that you want. With this release, if you provide AWS Config with your KMS key or alias ARN, AWS Config will use that KMS key instead of using AES-256 encryption. This post describes how to use the AWS Config Auto Remediation feature to auto remediate any non-compliant S3 buckets using the following AWS Config rules: These AWS Config rules act as controls to prevent any non-compliant S3 activities. Save changes From TF: To use kms key encryption for s3 bucket, use following configuration: 5. The "s3-bucket-server-side-encryption-enabled" AWS Config rule can now auto-remediate non-compliant resources. With a few clicks in AWS Management Console and no changes to your client applications, you can configure your buckets to use an S3 Bucket Key for KMS-based encryption on new objects. Amazon S3 only supports symmetric KMS keys and not asymmetric KMS keys. This is because KMS-encrypted objects in S3 use an individual KMS key and S3 makes a call to KMS for each read and write request to these objects. You will also have the option to override the S3 Bucket Key configuration for specific objects in a bucket with an individual per-object KMS key using the API and SDK. At this point in time, the s3:PutObject will respect the configuration provided by the terraform plan and omit both the s3:x-amz-server-side-encryption and s3:x-amz-server-side-encryption-aws-kms-key-id headers (here and here). Click on the "Create bucket" button. 2022, Amazon Web Services, Inc. or its affiliates. After fiddling around, I think that this is caused by the Computed flag ( here) for server_side_encryption.
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