Configure Okta for External OAuth¶
This topic describes how to configure Snowflake as an OAuth Resource and Okta as an External OAuth authorization server to facilitate secure, programmatic access to Snowflake data.
The following five steps assume that your environment does not have anything configured relating to Okta OAuth authorization servers, OAuth clients, scopes, and necessary metadata.
The information from Steps 1-3 will be used to create a security integration in Snowflake.
If you already have an Okta authorization server and client configured, it is not necessary to complete all of the steps below. Rather, skim the following four steps and verify that you can obtain the desired information, create scopes, assign scopes to one or more policies, and access the metadata.
If you do not have and Okta OAuth authorization server and client configured, complete all of the following five steps.
The steps in this topic are a representative example on how to configure Okta for External OAuth.
You can configure Okta to any desired state and use any desired OAuth flow provided that you can obtain the necessary information for the security integration (in this topic).
Note that the following steps serve as a guide to obtain the necessary information to create the security integration in Snowflake.
Be sure to consult your internal security policies with regard to configuring an authorization server to ensure your organization meets all necessary regulations and compliance requirements.
Steps 1-3 are derived from the Okta documentation on Authorization Servers. For more information on how Okta defines its terms, its user interface, and options relating to Authorization Servers, consult the following Okta guides:
Create an OAuth compatible client to use with Snowflake¶
Navigate to the Okta Admin Console.
Click Add Application.
Click Create New App.
For Platform, select Native App.
Enter a name for the application.
In the Login redirect URIs box, add the full Snowflake account URL (i.e.
https://<account_identifier>.snowflakecomputing.com). For a list of possible URL formats, see Connecting with a URL.
From New Applications in the General interface, click Edit.
Check Refresh Token and Resource Owner Password.
Click the Edit button next to Client Credentials.
Select the Use Client Authentication option.
In the Client Credentials container, save the ClientID and Secret. These two values will be known as the
<OAUTH_CLIENT_SECRET>, respectively in the following steps.
Collect Okta information¶
Go to the Okta Admin Console.
In the Security menu, click API.
Click Authorization Servers.
Click on the Authorization Server for the Snowflake Resource.
In the Settings tab, copy the Issuer value. This value will be known as the
<OKTA_ISSUER>in the following steps. Its format should resemble
In the Metadata document:
Copy the Metadata URI value, open a browser tab, and paste the URL in the address bar.
You should see JSON text in the browser. You can work with this text in a text editor or in the browser itself.
"jwks_uri"parameter and copy its value. Its format should resemble
https://dev-111111.oktapreview.com/oauth2/auslh9j9vf9ej7NfT0h7/v1/keys. This endpoint will be known as the
<OKTA_JWS_KEY_ENDPOINT>in the following steps.
"token_endpoint"parameter and copy its value. Its format should resemble
https://dev-111111.oktapreview.com/oauth2/auslh9j9vf9ej7NfT0h7/v1/token. This endpoint will be known as the
<OKTA_OAUTH_TOKEN_ENDPOINT>in the following steps.
Create a security integration for Okta¶
This step creates a security integration in Snowflake. The security integration ensures that Snowflake can communicate with Okta securely, validates the tokens from Okta, and provides the appropriate Snowflake data access to users based on the user role associated with the OAuth token.
For more information, see CREATE SECURITY INTEGRATION.
Only account administrators (i.e. users with the ACCOUNTADMIN role) or a role with the global CREATE INTEGRATION privilege can execute this SQL command.
The security integration parameter values are case-sensitive and the values you put into the security integration must match those values in your environment. If the case does not match, it is possible that the access token will not be validated resulting in a failed authentication attempt.
Create a security integration with audiences
external_oauth_audience_listparameter of the security integration must match the Audience that you specified while configuring Okta.create security integration external_oauth_okta_2 type = external_oauth enabled = true external_oauth_type = okta external_oauth_issuer = '<OKTA_ISSUER>' external_oauth_jws_keys_url = '<OKTA_JWS_KEY_ENDPOINT>' external_oauth_audience_list = ('<snowflake_account_url') external_oauth_token_user_mapping_claim = 'sub' external_oauth_snowflake_user_mapping_attribute = 'login_name';
Modifying Your External OAuth Security Integration¶
You can update your External OAuth security integration by executing an ALTER statement on the security integration.
For more information, see ALTER SECURITY INTEGRATION (External OAuth).
Using ANY role with External OAuth¶
In the configuration step to create a security integration in Snowflake, the OAuth access token includes the scope definition. Therefore, at runtime, using the External OAuth security integration allows neither the OAuth client nor the user to use an undefined role in the OAuth access token.
After validating the access token and creating a session, the ANY role can allow the OAuth client and user to decide its role. If necessary, the client or the user can switch to a role that is different that the role defined in the OAuth access token.
To configure ANY role, define the scope as
SESSION:ROLE-ANY and configure the security integration with the
external_oauth_any_role_mode parameter. This parameter can have three possible string values:
DISABLEdoes not allow the OAuth client or user to switch roles (i.e.
use role <role>;). Default.
ENABLEallows the OAuth client or user to switch roles.
ENABLE_FOR_PRIVILEGEallows the OAuth client or user to switch roles only for a client or user with the
USE_ANY_ROLEprivilege. This privilege can be granted and revoked to one or more roles available to the user. For example:
grant USE_ANY_ROLE on integration external_oauth_1 to role1;
revoke USE_ANY_ROLE on integration external_oauth_1 from role1;
Define the security integration as follows:
create security integration external_oauth_1 type = external_oauth enabled = true external_oauth_any_role_mode = 'ENABLE' ...
Using secondary roles with External OAuth¶
The desired scope for the primary role is passed in the external token: either the default role for the user (
a specific role that was granted to the user (
By default, Snowflake does not activate the default secondary roles for a user (i.e. the DEFAULT_SECONDARY_ROLES) user in the session.
To activate the default secondary roles for a user in a session and allow executing the USE SECONDARY ROLES command while using External OAuth, complete the following steps:
Configure the security integration for the connection. Set the EXTERNAL_OAUTH_ANY_ROLE_MODE parameter value to either ENABLE or ENABLE_FOR_PRIVILEGE when you create the security integration (using CREATE SECURITY INTEGRATION) or later (using ALTER SECURITY INTEGRATION).
Configure the authorization server to pass the static value of
session:role-anyin the scope attribute of the token. For more information about the scope parameter, see External OAuth overview.
Using Client Redirect with External OAuth¶
Snowflake supports using Client Redirect with External OAuth, including using Client Redirect and OAuth with supported Snowflake Clients.
For more information, see Redirecting Client Connections.
Using network policies with External OAuth¶
Currently, network policies cannot be added to your External OAuth security integration. However, you can still implement network policies that apply broadly to the entire Snowflake account.
If your use case requires a network policy that is specific to the OAuth security integration, use Snowflake OAuth. This approach allows the Snowflake OAuth network policy to be distinct from other network policies that may apply to the Snowflake account.
For more information, see Network policies.
Using replication with External OAuth¶
Snowflake supports replication and failover/failback of the External OAuth security integration from a source account to a target account.
In the context of testing OAuth while using Okta as an authorization server, you must:
Verify that the test user exists in Okta and has a password.
Verify that the test user exists in Snowflake with their
login_nameattribute value set to the
Register an OAuth Client.
Allow the OAuth Client to make a POST request to the Okta Token endpoint as follows:
Grant type set to Resource Owner
HTTP Basic Authorization header containing the clientID and secret
FORM data containing the user’s username & password
The sample command requests the Analyst and that assumes the
session:role:analyst have been defined in
Okta > OAuth App Resource.
Here is an example for getting an access token using cURL.
curl -X POST -H "Content-Type: application/x-www-form-urlencoded;charset=UTF-8" \ --user <OAUTH_CLIENT_ID>:<OAUTH_CLIENT_SECRET> \ --data-urlencode "username=<OKTA_USER_USERNAME>" \ --data-urlencode "password=<OKTA_USER_PASSWORD>" \ --data-urlencode "grant_type=password" \ --data-urlencode "scope=session:role:analyst" \ <OKTA_OAUTH_TOKEN_ENDPOINT>
Connecting to Snowflake with External OAuth¶
After configuring your security integration and obtaining your access token, you can connect to Snowflake using one of the following:
Note the following:
It is necessary to set the
tokenparameter to the
When passing the
tokenvalue as a URL query parameter, it is necessary to URL-encode the
When passing the
tokenvalue to a Properties object (e.g. JDBC Driver), no modifications are necessary.
For example, if using the Python Connector, set the connection string as shown below.
ctx = snowflake.connector.connect( user="<username>", host="<hostname>", account="<account_identifier>", authenticator="oauth", token="<external_oauth_access_token>", warehouse="test_warehouse", database="test_db", schema="test_schema" )
You can now use External OAuth to connect to Snowflake securely.