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Review and approve access requests using a custom signing key

This document shows how to set up Access Approval using the Google Cloud console and a custom signing key to receive email notifications of access requests on a project.

Access Approval ensures that a cryptographically-signed approval is present for Google personnel to access your content stored on Google Cloud.

Access Approval lets you bring your own cryptographic key to sign the access request. You can create a key using Cloud Key Management Service or bring an externally-managed key using Cloud External Key Manager.

Before you begin

Enroll in Access Approval

To enroll in Access Approval, do the following:

  1. In the Google Cloud console, select the project for which you want to enable Access Approval.

    Go to project selector

  2. Go to the Access Approval page.

    Go to Access Approval

  3. To enroll in Access Approval, click Enroll.

    Select the Enroll button.

  4. In the dialog box that opens, click Enroll.

    Access Approval disclaimer about increased support time.

Configure settings

On the Access Approval page in the Google Cloud console, click Manage settings.

Select the Manage settings button.

Select the services

By default, the services that require Access Approval are inherited from the project's parent resource. You can expand the scope of enrolment by selecting the option to automatically enable Access Approval for all the supported services.

Set up email notifications

This section explains how you can receive access request notifications for this project.

Grant the required IAM role

To view and approve access requests, you must have the Access Approval Approver (roles/accessapproval.approver) IAM role.

To grant this IAM role to yourself, do the following:

  1. Go to the IAM page in the Google Cloud console.

    Go to IAM

  2. Click Add.
  3. In the New principals field in the right pane, enter your email address.
  4. Click the Select a role field, and select the Access Approval Approver role from the menu.
  5. Click Save.

Add yourself as an approver for Access Approval requests

To add yourself as an approver so you can review and approve access requests, do the following:

  1. Go to the Access Approval page in the Google Cloud console.

    Go to Access Approval

  2. Click Manage settings.

  3. Under Set up approval notifications, add your email address in the User or group email field.

  4. To save the notification settings, click Save.

Use a custom signing key

Access Approval uses a signing key to verify the integrity of the access approval.

If you have Cloud EKM enabled, you can choose an externally-managed signing key. For information about using external keys, see Cloud EKM overview.

You can also choose to create a Cloud KMS signing key with an algorithm of your choice. For more information, see Creating asymmetric keys.

To use a custom signing key, follow the instructions in this section.

Get the email address of the service account

The email address for the service account is of the following form:

  service-pPROJECT_NUMBER@gcp-sa-accessapproval.iam.gserviceaccount.com

Replace PROJECT_NUMBER with the project number.

For example, the email address is service-p123456789@gcp-sa-accessapproval.iam.gserviceaccount.com for a service account in a project whose project number is 123456789.

To use your signing key, do the following:

  1. On the Access Approval page in the Google Cloud console, select Use a Cloud KMS signing key (advanced).

  2. Add the crypto key version resource ID.

    The crypto key version resource ID must have the following form:

    projects/PROJECT_ID/locations/LOCATION/keyRings/KEYRING_ID/cryptoKeys/CRYPTOKEY_ID/cryptoKeyVersions/KEY_ID
    

    For more information, see Getting a Cloud KMS resource ID.

  3. To save your settings, click Save.

    To use a custom signing key, you must provide the Cloud KMS CryptoKey Signer/Verifier (roles/cloudkms.signerVerifier) IAM role to the Access Approval service account for your project.

    If the Access Approval service account doesn't have the permissions to sign with the key you provided, you can grant the required permissions by clicking Grant. After granting the permissions, click Save.

    Save the selected settings.

Review Access Approval requests

Now that you have enrolled in Access Approval and added yourself as an approver for access requests, you can expect to receive email notifications for access requests.

The following image shows a sample email notification that Access Approval sends when Google personnel request access to customer content.

The email notification that gets sent when Google personnel request access to customer content.

To review and approve an incoming access request, do the following:

  1. Go to the Access Approval page in the Google Cloud console.

    Go to Access Approval

    To be taken to this page, you can also click the link in the email sent to you with the approval request.

  2. Click Approve.

After you approve the request, Google personnel with characteristics matching the approval, such as, same justification, location, or desk location can access the specified resource and its child resources within the approved time frame.

Clean up

  1. To unenroll from Access Approval, do the following:
    1. On the Access Approval page in the Google Cloud console, click Manage settings.
    2. Click Unenroll.
    3. In the dialog that opens, click Unenroll.
  2. To disable Access Transparency for your organization, contact Cloud Customer Care.

No additional steps are required to avoid incurring charges to your account.

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