mod-login-keycloak

Copyright (C) 2023-2023 The Open Library Foundation

This software is distributed under the terms of the Apache License, Version 2.0. See the file "LICENSE" for more information.

Table of contents

• Introduction
• Environment Variables
• Loading of client IDs/secrets
• Interaction with keycloak

Introduction

mod-login-keycloak provides following functionality:

• Uses keycloak token to authenticate in the okapi gateway.
• Application health and availability monitoring.

Environment Variables

Name	Default value	Required	Description
KC_URL	-	true	Keycloak URL
KC_LOGIN_CLIENT_SUFFIX	login-application	false	Keycloak client suffix
DB_HOST	localhost	false	Postgres hostname
DB_PORT	5432	false	Postgres port
DB_USERNAME	postgres	false	Postgres username
DB_PASSWORD	postgres	false	Postgres username password
DB_DATABASE	postgres	false	Postgres database name
KC_CONFIG_STORE_TYPE	ephemeral	false	Secure storage type
ENV	folio	false	Environment name
KC_CONFIG_TTL	3600s	false	Client credentials expiration timeout
KC_ADMIN_TOKEN_TTL	410s	false	Admin token cache ttl
KC_ADMIN_PASSWORD	keycloak_system_admin	true	Keycloak admin password
X_OKAPI_TOKEN_HEADER_ENABLED	false	false	Enable x-okapi-token header for login similar API methods
LOGIN_COOKIE_SAMESITE	None	false	Value for the SameSite attribute in a cookie header
login.cookie.samesite	None	false	Alias for LOGIN_COOKIE_SAMESITE

Secure storage environment variables

AWS-SSM

Required when SECRET_STORE_TYPE=AWS_SSM

Name	Default value	Description
SECRET_STORE_AWS_SSM_REGION	-	The AWS region to pass to the AWS SSM Client Builder. If not set, the AWS Default Region Provider Chain is used to determine which region to use.
SECRET_STORE_AWS_SSM_USE_IAM	true	If true, will rely on the current IAM role for authorization instead of explicitly providing AWS credentials (access_key/secret_key)
SECRET_STORE_AWS_SSM_ECS_CREDENTIALS_ENDPOINT	-	The HTTP endpoint to use for retrieving AWS credentials. This is ignored if useIAM is true
SECRET_STORE_AWS_SSM_ECS_CREDENTIALS_PATH	-	The path component of the credentials endpoint URI. This value is appended to the credentials endpoint to form the URI from which credentials can be obtained.

Vault

Required when SECRET_STORE_TYPE=VAULT

Name	Default value	Description
SECRET_STORE_VAULT_TOKEN	-	token for accessing vault, may be a root token
SECRET_STORE_VAULT_ADDRESS	-	the address of your vault
SECRET_STORE_VAULT_ENABLE_SSL	false	whether or not to use SSL
SECRET_STORE_VAULT_PEM_FILE_PATH	-	the path to an X.509 certificate in unencrypted PEM format, using UTF-8 encoding
SECRET_STORE_VAULT_KEYSTORE_PASSWORD	-	the password used to access the JKS keystore (optional)
SECRET_STORE_VAULT_KEYSTORE_FILE_PATH	-	the path to a JKS keystore file containing a client cert and private key
SECRET_STORE_VAULT_TRUSTSTORE_FILE_PATH	-	the path to a JKS truststore file containing Vault server certs that can be trusted

Keycloak environment variables

Keycloak all configuration properties: https://www.keycloak.org/server/all-config

Name	Description
KC_HOSTNAME	Keycloak hostname, will be added to returned endpoints, for example for openid-configuration
KC_ADMIN	Initial admin username
KC_ADMIN_PASSWORD	Initial admin password
KC_DB	Database type
KC_DB_URL_DATABASE	Sets the database name of the default JDBC URL of the chosen vendor. If the DB_URL option is set, this option is ignored.
KC_DB_URL_HOST	Sets the hostname of the default JDBC URL of the chosen vendor. If the DB_URL option is set, this option is ignored.
KC_DB_URL_PORT	Sets the port of the default JDBC URL of the chosen vendor. If the DB_URL option is set, this option is ignored.
KC_DB_USERNAME	Database Username
KC_DB_PASSWORD	Database Password
KC_PROXY	The proxy address forwarding mode if the server is behind a reverse proxy. Possible values are: edge, reencrypt, passthrough. https://www.keycloak.org/server/reverseproxy
KC_HOSTNAME_STRICT	Disables dynamically resolving the hostname from request headers. Should always be set to true in production, unless proxy verifies the Host header.
KC_HOSTNAME_PORT	The port used by the proxy when exposing the hostname. Set this option if the proxy uses a port other than the default HTTP and HTTPS ports. Defaults to -1.
KC_CLIENT_TLS_ENABLED	Enables TLS for keycloak clients.
KC_CLIENT_TLS_TRUSTSTORE_PATH	Truststore file path for keycloak clients.
KC_CLIENT_TLS_TRUSTSTORE_PASSWORD	Truststore password for keycloak clients.
KC_CLIENT_TLS_TRUSTSTORE_TYPE	Truststore file type for keycloak clients.

Kafka environment variables

Kafka all configuration properties: https://kafka.apache.org/documentation/#configuration

Name	Description
KAFKA_SSL_KEYSTORE_PASSWORD	Kafka keystore password
KAFKA_SSL_KEYSTORE_LOCATION	Kafka keystore location
KAFKA_SSL_TRUSTSTORE_PASSWORD	Kafka truststore password
KAFKA_SSL_TRUSTSTORE_LOCATION	Kafka truststore location

Loading of client IDs/secrets

The module pulls client_secret for client_id from AWS Parameter store, Vault or other reliable secret storages when they are required for login. The credentials are cached for 3600s.

Interaction with keycloak

Authenticate with Keycloak (using user's credentials) and get back an access token and refresh token

curl -XPOST \
-H "Content-Type: application/x-www-form-urlencoded" \
--data-urlencode "username=$username" \
--data-urlencode "password=$password" \
--data-urlencode "client_id=$clientId" \
--data-urlencode "client_secret=$clientSecret" \
--data-urlencode "grant_type=password" \
--data-urlencode "scopes=openid profile email" \
"$keycloakUrl/realms/$tenantId/protocol/openid-connect/token"

Get User Info

curl -XGET \
-H "Content-Type: application/x-www-form-urlencoded" \
-H "Authorization: Bearer $acessToken" \
"$keycloakUrl/realms/$tenantId/protocol/openid-connect/userinfo"

Introspect Token

curl -XPOST \
-H "Content-Type: application/x-www-form-urlencoded" \
--data-urlencode "token=$accessToken" \
--data-urlencode "client_id=$clientId" \
--data-urlencode "client_secret=$clientSecret" \
"$keycloakUrl/realms/$tenantId/protocol/openid-connect/token/introspect"

Refresh token

curl -XPOST \
-H "Content-Type: application/x-www-form-urlencoded" \
--data-urlencode "refresh_token=$refreshToken" \
--data-urlencode "client_id=$clientId" \
--data-urlencode "client_secret=$clientSecret" \
--data-urlencode "grant_type=refresh_token" \
"$keycloakUrl/realms/$tenantId/protocol/openid-connect/token"

Logout

curl -XPOST \
-H "Content-Type: application/x-www-form-urlencoded" \
--data-urlencode "refreshToken=$refreshToken" \
--data-urlencode "client_id=$clientId" \
--data-urlencode "client_secret=$clientSecret" \
"$keycloakUrl/realms/$tenantId/protocol/openid-connect/logout"

Reset password

curl -XPUT \
-H "Content-Type: application/json" \
-H "Authorization: $KEYCLOAK_TOKEN" \
--data-raw '{
    "temporary": false,
    "type": "password",
    "value": "demouser"
}'
"$keycloakUrl/admin/realms/$tenantId/users/{userId}/reset-password"

Get Credentials

curl -XGET \
-H "Content-Type: application/json" \
-H "Authorization: $KEYCLOAK_TOKEN" \
"$keycloakUrl/admin/realms/$tenantId/users/{userId}/credentials"

Delete Credentials

curl -XDELETE \
-H "Content-Type: application/json" \
-H "Authorization: $KEYCLOAK_TOKEN" \
"$keycloakUrl/admin/realms/$tenantId/users/{userId}/credentials/{credentialId}"