Blog Updates, tips and behind-the-scenes from the team

This issue has been resolved as of September 11th with the OAuth App Verification completed including the paid CASA assessment.

To access Google Drive or Google Cloud Storage using Cyberduck or Mountain Duck we have registered an OAuth 2.0 Client ID with Google that is required to show users a consent screen to access files from these cloud storage services using the respective APIs.

Google recently blocked the consent screen and now shows the following error when trying to open a new connection:

This app tried to access sensitive info in your Google Account. To keep your account safe, Google blocked this access.

We are aware of the problem and are currently working on getting the consent screen re-approved by Google.

No user data is collected or shared when you access your data in Google Drive or Google Cloud Storage using Cyberduck or Mountain duck. We do not transfer or disclose your information to third parties. Any data accessed is processed solely on your device.

As a workaround you can register your own Custom OAuth 2.0 Client ID for Google Cloud Storage and Google Drive and using with a custom connection profile instead.

Cyberduck 9 adds a new custom file versioning feature for protocols with no native versioning support, such as FTP/SFTP and WebDAV.

The feature is added as a security measure to reduce the risk of file loss when editing changes. You can enable the option by default in the Editor tab in Preferences.

The versions can be previewed, deleted or restored in Edit → Info → Versions with the same user interface as when working with revisions from protocols with native versioning support such as a versioned bucket in S3.

Technically instead of overwriting files, previous versions are moved to a folder named .duckversions created adjacent to the edited file. The documentation has more details.

ownCloud Infinite Scale is a user-centric, cloud-native, open source, file sharing and collaboration platform that offers infinite scalability and enables complete digital sovereignty. 

ownCloud Infinite Scale uses federated authentication with Keycloak as the identity provider by default. To connect using Cyberduck or Mountain Duck.

We will provide sample steps to connect to ownCloud Infinite Scale (oCIS) using OAuth 2.0/OpenID Connect (OIDC). It requires the client registration in the identity provider in ownCloud and a custom connection profile for Cyberduck & Mountain Duck. To allow to test this without a custom deployment, the sample makes use of the public instance running at ocis.ocis-keycloak.latest.owncloud.works with the identity provider at keycloak.ocis-keycloak.latest.owncloud.works. You can login with the username “admin” and password “admin”. Note that these demo instances are wiped periodically and all data and configuration is temporarily available only.

Import client configuration

You will need to import a client configuration for Keycloak to allow OAuth authentications from Cyberduck & Mountain Duck. The configuration registers a OAuth Client ID with the redirect URIs x-cyberduck-action:oauth and x-mountainduck-action:oauth set to allow a seamless login integration.

Connection Profile

The connection profile defines the custom OAuth Client ID to be used to connect to ownCloud including the authorization and token URLs used for authentication with the Keycloak identity provider. The connection profile matching the above client registration is

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
    <dict>
        <key>Protocol</key>
        <string>owncloud</string>
        <key>Vendor</key>
        <string>owncloud.works</string>
        <key>Description</key>
        <string>ownCloud Infinite Scale</string>
        <key>Default Nickname</key>
        <string>ownCloud Infinite Scale</string>
        <key>Default Hostname</key>
        <string>ocis.ocis-keycloak.latest.owncloud.works</string>
        <key>Default Path</key>
        <string>/remote.php/webdav/</string>
        <key>Path Configurable</key>
        <true/>
        <key>Hostname Configurable</key>
        <true/>
        <key>OAuth Configurable</key>
        <true/>
        <key>OAuth Authorization Url</key>
        <string>https://keycloak.ocis-keycloak.latest.owncloud.works/realms/oCIS/protocol/openid-connect/auth</string>
        <key>OAuth Token Url</key>
        <string>https://keycloak.ocis-keycloak.latest.owncloud.works/realms/oCIS/protocol/openid-connect/token</string>
        <key>Scopes</key>
        <array>
            <string>openid</string>
            <string>email</string>
            <string>offline_access</string>
        </array>
        <key>OAuth Client ID</key>
        <string>3keLfua0olYvW1zKXTDB3OjAMPEYWEQNuiscli395GKJOiPnPURNQWGvGCJZf4Hw</string>
        <key>OAuth Client Secret</key>
        <string>yoqICbLIeYbpZPqDH4D8k4NKb04HqnrWBntEeVZEQ5gO1RmaUlln0Aqu1dj2UoF4</string>
        <key>OAuth Redirect Url</key>
        <string>${oauth.handler.scheme}:oauth</string>
        <key>Password Configurable</key>
        <false/>
        <key>Username Configurable</key>
        <false/>
    </dict>
</plist>

Save the file with the suffix .cyberduckprofile and double click to install and register with Cyberduck & Mountain Duck. This will enable the protocol option ownCloud Infinite Scale in the bookmark configuration.

The latest versions of Cyberduck & Mountain Duck now allow to connect to S3 by authenticating with an OpenID Connect (OIDC) identity provider.

Connections to S3 with web identity federation use AWS Security Token Service (STS) API to obtain temporary security credentials to authenticate with S3.

With web identity federation, you don’t need to (…) manage your own user identities. Instead, users of your app can sign in using a well-known external OpenID Connect (OIDC)-compatible IdP. They can receive an authentication token, and then exchange that token for temporary security credentials in AWS that map to an IAM role with permissions to use the resources in your AWS account. Using an IdP helps you keep your AWS account secure, because you don’t users to have long-term security credentials.

Default connection profiles for Google and Azure

Default connection profiles are provided to use Google or Azure AD as an identity provider in conjunction with AWS.

These default profiles will prompt users for the Role ARN configured in AWS IAM referencing the trust relationship configured with the identity provider. Assigned by AWS this has a format similar to arn:aws:iam::930717317329:role/my-role-name.

Configuration in AWS IAM

1. Add an identity provider in IAM. Refer to the documentation from AWS.

2. Assign a role. The role is crucial as it contains both the trust relationship with the identity provider and permission policy:

3. The trust policy restricts access to users authenticated with a specific identity provider and allows to filter for specific users in the Condition statement with access to the JSON Web Token (JWT) claims that can be matched.

4. With the permission policy attached it limits access to a predefined set of buckets or keys.

Refer to the AWS documentation on Creating a role for web identity or OpenID Connect Federation.

The role that your application assumes must trust the identity provider that is associated with the identity token. In other words, the identity provider must be specified in the role’s trust policy. The call to AssumeRoleWithWebIdentity should include the ARN of the role that is specific to the provider through which the user signed in.

Custom Integration

We have made available documentation to write your own connection profile for different combinations of S3/STS and identity provider such as MinIO S3 authenticating with MinIO STS and Keycloak (OIDC).

Documentation

Refer to our S3 documentation.

SMB (Server Message Block) is used to access Windows File Shares or a Samba Linux Server. Cyberduck 8.7.0 adds support to access SMB shares as an light-weight, performant alternative to built-in support in macOS and Windows. Support in Mountain Duck is forthcoming in version 5.

Connecting to SMB

To connect to your SMB (formerly known as CIFS (Common Internet File System) server such as a NAS (Network Attached Storage) using NTLM authentication, select SMB (Server Message Block) in Open Connection or the Bookmark configuration. The default domain name is set to “WORKGROUP” and can be changed to meet the username format requirement depending on the server setup.

SMB Share

You will provided with a list of available shares from the server or alternatively if not supported prompted to input the share name manually. Specify the share name as a Path in the bookmark to avoid connect to a single share.

Up-to-date information about SMB interoperability can be found in out documentation.