Project: ORY Hydra (Provisioning / Key Management)
File: UPGRADE.md

The intent of this document is to make migration of breaking changes as easy as possible. Please note that not all breaking changes might be included here. Please check the for a full list of changes before finalizing the upgrade process. <!-- START doctoc generated TOC please keep comment here to allow auto update --> <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE --> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <!-- END doctoc generated TOC please keep comment here to allow auto update --> Do you want the latest features and patches without work and hassle? Are you looking for a reliable, scalable, and secure deployment with zero effort? We can run it for you! If you're interested, ! Migrations are now handled with https://github.com/gobuffalo/fizz. Please run `hydra migrate sql` when upgrading to this version. For a full list of changes please check: https://github.com/ory/hydra/compare/v1.4...v1.5.0 Please run `hydra migrate sql` when upgrading to this version. For more information, check https://github.com/ory/hydra/commit/700d17d3b7d507de1b1d459a7261d6fb2571ebe3. For a full list of changes please check: https://github.com/ory/hydra/compare/v1.3.2...v1.4.1 Please run `hydra migrate sql` when upgrading to this version. For more information, check https://github.com/ory/hydra/commit/d9308fa0dba26019a59e4d97e85b036133ad8362. This release focuses on a rework of the SDK pipeline. First of all, we have introduced new SDKs for all popular programming languages and published them on their respective package repositories: (with TypeScript) The SDKs hosted in this repository (under ./sdk/...) have been completely removed. Please use only the SDKs from the above sources from now on as it will also remove several issues that were caused by the previous SDK pipeline. Unfortunately, there were breaking changes introduced by the new SDK generation: Several structs and fields have been renamed in the Go SDK. However, nothing else changed so upgrading should be a matter of half an hour if you made extensive use of the SDK, or several minutes if just one or two methods are being used. All other SDKs changed to `openapi-generator`, which is a better maintained generator that creates better code than the one previously used. This manifests in TypeScript definitions for the NodeJS SDK and several other goodies. We do not have a proper migration path for those, unfortunately. If you have issues with upgrading the SDK, please let us know in an issue on this repository! Several indices have been added to the SQL Migrations. There are no backwards incompatible changes in this release but we advise to do a test-run of the SQL Migrations before applying them, as they might lock some tables which may cause downtimes. Make a backup of your database before applying this change. After applying these SQL Migrations, several queries and endpoints will be much faster than before. A minor Schema change was introduced to the OAuth 2.0 Clients table. It is now possible to store arbitrary metadata for a client. Make a backup of your database before applying this change. This patch implements OpenID Connect Front-/Backchannel Logout 1.0 (). Therefore, endpoint `/oauth2/auth/sessions/login/revoke` has been deprecated. Please read all paragraphs of this section with the utmost care, before executing `hydra migrate

Do not take this change lightly and create a backup of the database before you begin. To be sure, copy the database and do a dry-run locally. Be aware that running these migrations might take some time when using large databases. Do a dry-run before hammering your production database. `hydra migrate sql` now shows an execution plan and asks for confirmation before executing the migrations. To run migrations without user interaction, add flag `--yes`. Orthogonal to the changes when accepting and rejection consent and login requests, the following endpoints have been updated as well: `DELETE /oauth2/auth/sessions/login/:subject` -> `DELETE /oauth2/auth/sessions/login?subject={subject}` `GET /oauth2/auth/sessions/consent/:subject` -> `GET /oauth2/auth/sessions/login?subject={subject}` `DELETE /oauth2/auth/sessions/consent/:subject` -> `DELETE /oauth2/auth/sessions/login?subject={subject}` `DELETE /oauth2/auth/sessions/consent/:subject/:client` -> `DELETE /oauth2/auth/sessions/login?subject={subject}&client={client}` While this does not include a security warning, this patch allows developers to use slashes in dots in their subject/user IDs. The Go SDK is now being generated using `go-swagger`. The SDK generated using `swagger-codegen` is no longer supported. The old Go SDK is still available but moved to a new path. To use it, change: ``` import "github.com/ory/hydra/sdk/go/hydra" import "github.com/ory/hydra/sdk/go/hydra/swagger" import hydra "github.com/ory/hydra-legacy-sdk" import "github.com/ory/hydra-legacy-sdk/swagger" ``` Previously, login and consent requests were accepted/rejected by doing one of: ``` GET /oauth2/auth/requests/login/{challenge} PUT /oauth2/auth/requests/login/{challenge}/accept PUT /oauth2/auth/requests/login/{challenge}/reject GET /oauth2/auth/requests/consent/{challenge} PUT /oauth2/auth/requests/consent/{challenge}/accept PUT /oauth2/auth/requests/consent/{challenge}/reject ``` We observed login/consent apps that did not properly sanitize the `{challenge}` parameter, making it possible to escape the path by using `..` in the challenge parameter (e.g. `http://my-login-app/login?challenge=../../whatever`) causing the login/consent app to execute a request it is not supposed to be making (e.g. `/oauth2/auth/requests/login/../../whatever/accept`). From now on, the challenge has to be sent using a query parameter instead: ``` GET /oauth2/auth/requests/login?challenge={challenge} PUT /oauth2/auth/requests/login/accept?challenge={challenge} PUT /oauth2/auth/requests/login/reject?challenge={challenge} GET /oauth2/auth/requests/consent?challenge={challenge} PUT /oauth2/auth/requests/consent/accept?challenge={challenge} PUT /oauth2/auth/requests/consent/reject?challenge={challenge} ``` Implementers will still need to make sure that `challenge` is properly (query) scaped, but it's generally easier to secure than a path parameter. We've decided to make this a hard breaking change in order to force everybody to check if their application is vulnerable to this issue and to upgrade their code. The required code change is minimal but the resulting security improvements are potentially large. This patch introduces changes to the way configuration works in ORY Hydra. It allows ORY Hydra to be configured from a variety of sources including environment variables and a configuration file. In the future, ORY Hydra might be configurable using etcd or consul. The changes allow ORY Hydra to reload configuration without restarting in the future. An overview of configuration settings can be found . All changes are backwards compatible except for the way key rotation works (see next section) and the way DBAL plugins are loaded (see section after next). Rotating system secrets was fairly cumbersome in the past and required a restart of ORY Hydra. This changed. The system secret is now an array where the first element is used for encryption and all elements can be used for decryption. For more information on this topic, click . To make this change work, environment variable `ROTATEDSYSTEMSECRET` has been removed and can no longer be used. Command `hydra migrate secret` has also been removed without replacement as it is no longer required for rotating secrets. Environment variable `DATABASE_PLUGIN` has been replaced by `dsn`. To load a plugin, set `dsn: plugin:///path/to/plugin.so`. Please note that internals have changed radically with this patch and that there is some refactoring effort required to make plugins work with the most recent version. This patch requires you to run SQL migrations. No other important changes have been

This release ships with major scalability and reliability improvements and resolves several bugs. Please read all paragraphs of this section with the utmost care, before executing `hydra migrate sql`. Do not take this change lightly and create a backup of the database before you begin. To be sure, copy the database and do a dry-run locally. Be aware that running these migrations might take some time when using large databases. Do a dry-run before hammering your production database. In order to keep data consistent across tables, several foreign key constraints have been added between consent, oauth2, client tables. If you are running a large database take enough time to run this migration - it might take a while depending on the amount of data and the database version and driver. Before executing this migration, you should manually check and remove inconsistent data. This migration automatically removes inconsistent OAuth 2.0 and OpenID Connect data. Possible impacts are: Existing authorize codes, access, refresh tokens might be invalidated (all flows, including PKCE and OpenID Connect) As OAuth 2.0 clients are generally capable of handling re-authorization, this should not have a serious impact. Removing this data increases security through strong consistency. The following data-altering statements will be executed: ```sql -- First we need to delete all rows that point to a non-existing oauth2 client. DELETE FROM hydraoauth2access WHERE NOT EXISTS (SELECT 1 FROM hydraclient WHERE hydraoauth2access.clientid = hydra_client.id); DELETE FROM hydraoauth2refresh WHERE NOT EXISTS (SELECT 1 FROM hydraclient WHERE hydraoauth2refresh.clientid = hydra_client.id); DELETE FROM hydraoauth2code WHERE NOT EXISTS (SELECT 1 FROM hydraclient WHERE hydraoauth2code.clientid = hydra_client.id); DELETE FROM hydraoauth2oidc WHERE NOT EXISTS (SELECT 1 FROM hydraclient WHERE hydraoauth2oidc.clientid = hydra_client.id); DELETE FROM hydraoauth2pkce WHERE NOT EXISTS (SELECT 1 FROM hydraclient WHERE hydraoauth2pkce.clientid = hydra_client.id); -- request_id is a 40 varchar in the referenced table which is why we are resizing -- 1. We must remove request_ids longer than 40 chars. This should never happen as we've never issued them longer than this DELETE FROM hydraoauth2access WHERE LENGTH(request_id) > 40; DELETE FROM hydraoauth2refresh WHERE LENGTH(request_id) > 40; DELETE FROM hydraoauth2code WHERE LENGTH(request_id) > 40; DELETE FROM hydraoauth2oidc WHERE LENGTH(request_id) > 40; DELETE FROM hydraoauth2pkce WHERE LENGTH(request_id) > 40; -- 2. Next we're actually resizing ALTER TABLE hydraoauth2access ALTER COLUMN request_id TYPE varchar(40); ALTER TABLE hydraoauth2refresh ALTER COLUMN request_id TYPE varchar(40); ALTER TABLE hydraoauth2code ALTER COLUMN request_id TYPE varchar(40); ALTER TABLE hydraoauth2oidc ALTER COLUMN request_id TYPE varchar(40); ALTER TABLE hydraoauth2pkce ALTER COLUMN request_id TYPE varchar(40); -- In preparation for creating the client_id index and foreign key, we must set it to varchar(255) which is also -- the length of hydra_client.id DELETE FROM hydraoauth2access WHERE LENGTH(client_id) > 255; DELETE FROM hydraoauth2refresh WHERE LENGTH(client_id) > 255; DELETE FROM hydraoauth2code WHERE LENGTH(client_id) > 255; DELETE FROM hydraoauth2oidc WHERE LENGTH(client_id) > 255; DELETE FROM hydraoauth2pkce WHERE LENGTH(client_id) > 255; ALTER TABLE hydraoauth2access ALTER COLUMN client_id TYPE varchar(255); ALTER TABLE hydraoauth2refresh ALTER COLUMN client_id TYPE varchar(255); ALTER TABLE hydraoauth2code ALTER COLUMN client_id TYPE varchar(255); ALTER TABLE hydraoauth2oidc ALTER COLUMN client_id TYPE varchar(255); ALTER TABLE hydraoauth2pkce ALTER COLUMN client_id TYPE varchar(255); ``` This migration automatically removes inconsistent login & consent data. Possible impacts are: Users that set `remember` to true during login have to re-authenticate. Users that set `remember` to true during consent have to re-authorize requested OAuth 2.0 Scope. Data associated with OAuth 2.0 Clients that have been removed will be

That is achieved by running the following queries. Make sure you understand what these queries do and what impact they may have on your system before executing `hydra migrate sql`: ```sql -- This can be null when no previous login session exists, so let's remove default ALTER TABLE hydraoauth2authenticationrequest ALTER COLUMN loginsession_id DROP DEFAULT; -- This can be null when no previous login session exists or if that session has been removed, so let's remove default ALTER TABLE hydraoauth2consentrequest ALTER COLUMN loginsession_id DROP DEFAULT; -- This can be null when the login_challenge was deleted (should not delete the consent itself) ALTER TABLE hydraoauth2consentrequest ALTER COLUMN loginchallenge DROP DEFAULT; -- Consent requests that point to an empty or invalid login request should set their login_challenge to NULL UPDATE hydraoauth2consentrequest SET loginchallenge = NULL WHERE NOT EXISTS ( SELECT 1 FROM hydraoauth2authenticationrequest WHERE hydraoauth2consentrequest.loginchallenge = hydraoauth2authenticationrequest.challenge ); -- Consent requests that point to an empty or invalid login session should set their loginsessionid to NULL UPDATE hydraoauth2consentrequest SET loginsession_id = NULL WHERE NOT EXISTS ( SELECT 1 FROM hydraoauth2authenticationsession WHERE hydraoauth2consentrequest.loginsessionid = hydraoauth2authentication_session.id ); -- Login requests that point to a login session that no longer exists (or was never set in the first place) should set that to NULL UPDATE hydraoauth2authenticationrequest SET loginsession_id = NULL WHERE NOT EXISTS ( SELECT 1 FROM hydraoauth2authenticationsession WHERE hydraoauth2authenticationrequest.loginsessionid = hydraoauth2authentication_session.id ); -- Login, consent, obfuscated sessions that point to a client which no longer exists must be deleted DELETE FROM hydraoauth2authenticationrequest WHERE NOT EXISTS (SELECT 1 FROM hydraclient WHERE hydraoauth2authenticationrequest.clientid = hydra_client.id); DELETE FROM hydraoauth2consentrequest WHERE NOT EXISTS (SELECT 1 FROM hydraclient WHERE hydraoauth2consentrequest.clientid = hydra_client.id); DELETE FROM hydraoauth2obfuscatedauthenticationsession WHERE NOT EXISTS (SELECT 1 FROM hydraclient WHERE hydraoauth2obfuscatedauthenticationsession.clientid = hydra_client.id); -- Handled login and consent requests which point to a consent/login request that no longer exists must be deleted DELETE FROM hydraoauth2consentrequesthandled WHERE NOT EXISTS (SELECT 1 FROM hydraoauth2consentrequest WHERE hydraoauth2consentrequesthandled.challenge = hydraoauth2consentrequest.challenge); DELETE FROM hydraoauth2authenticationrequesthandled WHERE NOT EXISTS (SELECT 1 FROM hydraoauth2consentrequest WHERE hydraoauth2authenticationrequesthandled.challenge = hydraoauth2consentrequest.challenge); ``` Be aware that some queries might cascade and remove other data to. One such example is checking `hydraoauth2consent_request` for rows that have no associated `login_challenge`. If such a row is removed, the associated `hydraoauth2consentrequesthandled` is removed as well. Several indices have been added which should resolve table locking when searching in large data sets. This patch adds the access token audience feature. For more information on this, head over to . Previously, the refresh grant did not check whether a client's allowed scope or audience changed. This has now been added. If an OAuth 2.0 Client performs the refresh flow but the requested token includes a scope which has not been whitelisted at the client, the flow will fail and no refresh token will be granted. You can now set the login and consent flow timeout using environment variable `LOGINCONSENTREQUEST_LIFESPAN`. All refresh tokens issued with this release will expire after 30 days of non-use. This behaviour can be modified using the `REFRESHTOKENLIFESPAN` environment variable. By setting `REFRESHTOKENLIFESPAN=-1`, refresh tokens are set to never expire, which is the previous behaviour. Tokens issued before this change will still be valid forever. We discourage setting `REFRESHTOKENLIFESPAN=-1` as it might clog the database with tokens that will never be used again. In high-scale systems, `REFRESHTOKENLIFESPAN` should be set to something like 15 or 30 days. To better represent the public and admin endpoint, previous swagger tags (like oAuth2, jwks,

have been deprecated in favor of tags `public` and `admin`. This has different impacts for the different code-generated client libraries. If you use the `hydra.SDK` interface only and the `hydra.NewSDK()` factory, everything will work as before. If you rely on e.g. `hydra.Ne.OAuth2Api.)`, you will be affected by this change. All method signatures stayed the same, but the factory names for instantiating the SDK client have changed. For example, `hydra.Ne.OAuth2Api.)` is now `hydra.NewAdminApi()` and `hydra.NewPublicApi()` - depending on which endpoints you need to interact with. Previously, extra fields coming from `session.access_token` where directly embedded in the OAuth 2.0 Access Token when the JSON Web Token strategy was used. However, the token introspection response returned the extra data as a field `ext: {...}`. In order to have a streamlined experience, session data is from now on stored in a field `ext: {...}` for Access Tokens formatted as JSON Web Tokens. This change does not impact the opaque strategy, which is the default one. Flags `https-tls-key-path` and `https-tls-cert-path` have been removed from the `hydra serve *` commands. Use environment variables `HTTPSTLSCERT_PATH` and `HTTPSTLSKEY_PATH` instead. Endpoint `/health/status`, which redirected to `/health/alive` was deprecated and has been removed. A new environment variable `CORS_ENABLED` was introduced. It sets whether CORS is enabled ("true") or not ("false")". Default is disabled. This patch introduces some minor database schema changes. Before you apply it, you must run `hydra migrate sql` against your database. Previously, all endpoints were exposed at one port. Since access control was removed with version 1.0.0, administrative endpoints (JWKs management, OAuth 2.0 Client Management, Login & Consent Management) were exposed and had to be secured with sophisticated set ups using, for example, an API gateway to control which endpoints can be accessed by whom. This version introduces a new port (default `:4445`, configurable using environment variables `ADMINPORT` and `ADMINPOST`) which is serves all administrative APIs: All `/clients` endpoints. All `/jwks` endpoints. All `/health`, `/metrics`, `/version` endpoints. All `/oauth2/auth/requests` endpoints. Endpoint `/oauth2/introspect`. Endpoint `/oauth2/flush`. The second port exposes API endpoints generally available to the public (default `:4444`, configurable using environment variables `PUBLIC_PORT` and `PUBLIC_HOST`): `./well-known/jwks.json` `./well-known/openid-configuration` `/oauth2/auth` `/oauth2/token` `/oauth2/revoke` `/oauth2/fallbacks/consent` `/oauth2/fallbacks/error` `/userinfo` The simplest way to starting both ports is to run `hydra serve`. This will start a process which listens on both ports and exposes their respective features. All settings (cors, database, tls, ...) will be shared by both listeners. To configure each listener differently - for example setting CORS for public but not privileged APIs - you can run `hydra serve public` and `hydra serve admin` with different settings. Be aware that this will not work with `DATABASE=memory` and that both services must use the same secrets. To reflect the changes made in this patch, the SDK's configuration struct has been updated. Additionally, `Configuration.PublicURL` has been added in case you need to perform OAuth2 flows with the SDK before accessing the admin endpoints. To reflect the changes of public and administrative ports, command `hydra serve` is now `hydra serve all`. CLI Commands like `hydra clients ...`, `hydra keys ...`, `hydra token flush`, `hydra token introspect` no longer use environment variable `HYDRA_URL` as default for `--endpoint` but instead `HYDRAADMINURL`. Previously, OAuth 2.0 Token Introspection was protected with HTTP Basic Authorization (a valid OAuth 2.0 Client with Client ID and Client Secret was needed) or HTTP Bearer Authorization (a valid OAuth 2.0 Access Token was needed). As OAuth

Token Introspection is generally an internal-facing endpoint used by resource servers to validate OAuth 2.0 Access Tokens, this endpoint has moved to the privileged port. The specification does not implore which authorization scheme must be used - it only shows that HTTP Basic/Bearer Authorization may be used. By exposing this endpoint to the privileged port a strong authorization scheme is implemented and no further authorization is needed. Thus, access control was stripped from this endpoint, making integration with other API gateways easier. You may still choose to export this endpoint to the public internet and implement any access control mechanism you find appropriate. Previously, OAuth 2.0 Clients had a flag called `public`. If set to true, the OAuth 2.0 Client was able to exchange authorize codes for access tokens without a password. This is useful in scenarios where the device can not keep a secret (browser app, mobile app). Since OpenID Connect Dynamic Discovery was added, this flag collided with the `tokenendpointauthmethod`. If `tokenendpointauthmethod` is set to `none`, then that is equal to setting `public` to `true`. To remove this ambiguity the `public` flag was removed. If you wish to create a client that runs on an untrusted device (browser app, mobile app), simply set `"tokenendpointauth_method": "none"` in the JSON request. If you are using the ORY Hydra CLI, you can use `--token-endpoint-auth-method none` to achieve what `--is-public` did previously. The SQL migrations will automatically migrate clients that have `public` set to `true` by setting `tokenendpointauth_method` to `none`. This patch resolves an issue which caused the migration to fail from beta.4 to beta.5 / beta.6. The reason being that the keys stored in the data store had mismatching `kid` values if generated by <= beta.5. This patch runs a SQL migration script which removes the old key and then, after booting up ORY Hydra, regenerates it. To apply this change, please run you must run `hydra migrate sql` against your database. This patch implements the OpenID Connect Dynamic Client registration specification and thus now supports client authentication via JSON Web Tokens signed with RSA public/private keypairs, alongside HTTP Basic Authorization and sending the client's ID and secret in the POST body. For more information on this, please refer to the . Previously, when response types such as `code token id_token` were requested (OpenID Connect Hybrid Flow) it was enough for the client to have `responsetypes=["code", "token", "idtoken"]`. This is however incompatible with the OpenID Connect Dynamic Client Registration 1.0 spec which dictates that the `response_types` have to match exactly. Assuming you are requesting `&responsetypes=code+token+idtoken`, your client should have `responsetypes=["code token idtoken"]`, if other response types are required (e.g. `&responsetypes=code`, `&responsetypes=token`) they too must be included: `responsetypes=["code", "token", "code token idtoken"]`. This will only affect you if you have clients requesting OpenID Connect Hybrid flows where more than one response_type is requested. This patch introduces some minor database schema changes. Before you apply it, you must run `hydra migrate sql` against your database. Previously, errors have been returned as nested objects: ```json { "error": { "error": "invalid_request" // ... } } ``` while other endpoints, specifically those under OAuth 2.0 / OpenID Connect returned them without nesting: ```json { "error": "invalid_request" // ... } ``` This patch updates all error responses and formats them coherently as across all APIs: ```json { "error": "invalid_request" // ... } ``` With support for the OpenID Connect Dynamic Discovery specification, a new field has been added to the OAuth

Client's metadata which is `tokenendpointauthmethod`. The `tokenendpointauthmethod` specifies which authentication methods the client can use at the token, introspection, and revocation endpoint. The default value for this method is `clientsecretbasic` which uses the Basic HTTP Authorization scheme. If your client uses the POST body to perform authentication, this value must be changed to `clientsecretpost` The spec formulates that the client's ID should be sent as field `client_id`. Until now, the id was sent as field `id`. This release changes that. For example, what was previously ``` $ curl http://hydra/clients/my-client { "id": "my-client", // ... } ``` is now ``` $ curl http://hydra/clients/my-client { "client_id": "my-client", // ... } ``` For now, the `id` field will still be returned, but is marked deprecated and will be removed in future releases. This section summarizes important changes introduced in 1.0.0. Follow it chronologically to ensure a proper migration. We are very well aware that the changelist is huge and we try to prepare you as good as we can to migrate to this version. We also understand that breaking changes are frustrating and it takes time to adopt to them. We sincerely hope that the benefits from this version (improved consent flow, easier set up, clear boundaries & responsibilities) outweigh the hassle of upgrading to the new version. If you have difficulties upgrading and would like a helping hand, reach out to us at and we will help you with the upgrade process. Our services are billed by the hour and are priced fairly. This is a (potentially incomplete) summary of what needs to be done to upgrade from versions of the 0.9.x branch, which are still common. As always, try this with a staging environment first and create back ups. Never run this directly in production unless you are 100% sure everything works: Get the latest ORY Hydra binary or docker image from the 1.0.0 branch. Run `$ export DATABASE_URL=<your-database-url>`. If you want to keep using Access Control Policies and the Warden API, you must install ORY Keto using the binaries or the docker image: `$ keto migrate hydra $DATABASE_URL`. `$ keto migrate sql $DATABASE_URL`. Read how to update the JWK storage: . If you only use auto-generated keys and have never used POST or PUT on the `/keys` API, you can probably just execute a `DELETE FROM hydra_jwk` to just remove all the auto-generated keys. When starting the ORY Hydra 1.0.0 CLI the required keys will be re-generated automatically. `$ hydra migrate sql $DATABASE_URL`. If you don't use Access Control Policies nor the Warden API, you can skip ORY Keto: Read how to update the JWK storage: and read point 3.3 of this list. `$ hydra migrate sql $DATABASE_URL`. `$ export SCOPESTRATEGY=DEPRECATEDHIERARCHICALSCOPESTRATEGY` - this will set the to the old scope strategy used in version 0.9.x. If you set this, you don't need to update the scopes your OAuth 2.0 Clients are allowed to request. `$ hydra help serve`. `$ hydra serve --your-flags`. It's still a good idea to read through the changes in 0.10.0, for example: . You can, however, skip the subsection in the 0.10.0 section. All required changes are explained in detail in this release's consent flow description. ORY Hydra is now OpenID Connect Certified! Certification spans the OAuth 2.0 Authorize Code Flow, Implicit Flow, and Hybrid Flow as well as dynamic discovery. The certification is one reason for the breaking changes in the consent

One change has been made to the introspection API which is that key `aud` is no longer a string, but an array of strings. As this claim has not been supported actively up until now, this will most likely not affect you at all. Previously, we disabled the introspection of refresh tokens. This has now changed to comply with the OAuth 2.0 specification. To distinguish tokens, use the `tokentype` in the introspection response. It can either be `accesstoken` or `refresh_token`. Internal access control, access control policies, and the Warden API have moved to a separate project called . You will be able to run a combination of ORY Hydra, , and which will be backwards compatible with ORY Hydra before the 1.0.0 release. This section explains how to upgrade and links to an example explaining the set up of the three services. This means that ORY Hydra has no longer any type of internal access control. Endpoints such as `POST /clients` no longer require access tokens to be accessed. You must secure these endpoints yourself. For more information, . handles access control using access control policies. The project currently supports the Warden API, Access Control Policy management, and Roles (previously known as ). ORY Keto is independent from ORY Hydra as it does not rely on any proprietary APIs but instead uses open standards such as OAuth 2.0 Token Introspection and the OAuth 2.0 Client Credentials Grant to authenticate credentials. ORY Keto can be used as a standalone project, and might even be used with other OAuth 2.0 providers, opening up tons of possible use cases and scenarios. To learn more about the project, head over to . Assuming that you have the 1.0.0 release binary of ORY Hydra and ORY Keto locally installed, you can migrate the existing policies and Warden Groups using the migrate commands. Please back up your database before doing this: ``` $ export DATABASE_URL=<your-database-url> $ keto migrate hydra $DATABASE_URL $ keto migrate sql $DATABASE_URL $ hydra migrate sql $DATABASE_URL ``` Now you can run `keto serve` and endpoints `/policies` as well as `/warden` will be available at ORY Keto's URL. We have set up a docker-compose example of a set up that resembles ORY Hydra prior to this release. You can find the source and documentation at . If you find it difficult to run this set up but would like to use the old access control mechanisms, feel free to reach out to us at . The Warden endpoints have moved to a new project. Thus, obviously, the URL changes too. The Warden API paths have changed as well: `/warden/allowed` is now `/warden/subjects/authorize` `/warden/token/allowed` is now `/warden/oauth2/access-tokens/authorize` `/warden/oauth2/clients/authorize` is a new endpoint that lets you authorize OAuth 2.0 Clients using their ID and secret. The backwards compatible set up properly forwards the old paths. If you use that image and you have been using `http://my-hydra/warden/token/allowed` previously, you can still use that URL to access that functionality if the backwards-compatible image is hosted at that location. This image does, however, currently not rewrite the request and response payloads. If you think that's a good idea, . The request payload of these endpoints has changed: `/warden/token/allowed` - only key `scopes` was renamed to `scope` in order to have a coherent API with any OAuth 2.0 endpoints which use the `scope` for singular and plural: Key `scopes` is now `scope` - a response body is `{ "token":

"action": "...", "resource": "...", "scope": ["scope-a", "scope-b"] }` instead of (previously) `{ "token": "...", "action": "...", "resource": "...", "scopes": ["scope-a", "scope-b"] }`. All other endpoints have not experienced any request payload changes. The response payload of these endpoints has changed: `/warden/token/allowed` - keys have been changed to conform to the OAuth 2.0 Introspection response payload and offer a coherent API. Key `grantedScopes` is now `scope` and is no longer an array string but rather a space-delimited string ("scope-a scope-b"). Key `clientId` is now `client_id`. Key `issuedAt` is now `iat`. Key `expires_at` is now `exp`. Key `subject` is now `sub`. Key `accessTokenExtra` is now `session` and might be omitted if the OAuth 2.0 Introspection Endpoint does not provide session data. Key `aud` ("audience") has been added as a string array. Key `iss` ("issuer") has been added. Key `nbf` ("not before") has been added. We are aware that these changes are rather serious, especially if you rely on the Warden API in each of your endpoints. If you have ideas on how to improve upgrading or offer a backwards compatible API, please and let us know. All other endpoints have not experienced any response payload changes. Warden Groups have been an experiment determined to simplify managing multiple subjects with the same access rights. In ORY Keto, Warden Groups have been renamed to Roles and the endpoint has moved from `/warden/groups` to `/roles`. No request or response payloads have changed, only the URL is a different one. If you use the backwards-compatible image, you can access roles using the `/warden/groups` path as you did before. Previously, JSON Web Keys did not have to specify a unique id. JWKs generated by ORY Hydra typically only used `public` or `private` as KeyID. This patch changes that and appends a unique id if no KeyID was given. To be able to separate between public and private key pairs in resource name, the public/private convention was kept. This change targets specifically the OpenID Connect ID Token and HTTP TLS keys. The ID Token key was previously "hydra.openid.id-token:public" and "hydra.openid.id-token:private" which now changed to something like "hydra.openid.id-token:public:9a458aa3-65a0-4982-835f-343eec45183c" and "hydra.openid.id-token:private:fa353995-d77d-420a-b967-63bf0721271b" with the UUID part being random for every installation. This change will help greatly with key rotation in the future. If you rely on these keys in your applications and if they are hardcoded in some way, you may want to use the `/.well-known/openid-configuration` or `/.well-known/jwks.json` endpoints instead. Libraries, which handle these standards appropriately, exist for almost any programming language. These keys will be generated automatically if they do not exist yet in the database. No further steps for upgrading are required. The consent flow has been refactored in order to implement session (login & consent) management in ORY Hydra and in order to properly support OpenID Connect parameters such as `prompt`, `max_age`, and others. First, the consent flow has been renamed to "User Login and Consent Flow". The consent app has been renamed to `User Login Provider` and `User Consent Provider`. If you implement both features (explained in the next sections) in one program, you can call it the `User Login and Consent Provider`. A reference implementation of the new User Login and Consent Provider is available at . The major difference between the old and new flow is, that authentication (user login) and scope authorization (user consent) are now two separate endpoints. The new User Login and Consent Flow is documented in the

The CLI has changed in order to improve developer experience and adopt to the changes made with this release. The command `hydra host` has been renamed to `hydra serve` as projects ORY Oathkeeper and ORY Keto use the `serve` terminology as well. Because this patch removes the internal access control, no root client and root policy will be created upon start up. Thus, environment variable `FORCEROOTCLIENT_CREDENTIALS` has been removed without replacement. To better reflect what environment variables touch which system, ISSUER has been renamed to `OAUTH2ISSUERURL` and `CONSENT_URL` has been renamed to `OAUTH2CONSENTURL`. Additionally, flag `--dangerous-force-auto-logon` has been removed it has no effect any more. The command `hydra connect` has been removed as it no longer serves a purpose now that the internal access control has been removed. Every command you call now needs the environment variable `HYDRAURL` (previously named `CLUSTERURL`) which should point to ORY Hydra's URL. Removing this command has an additional benefit - privileged client IDs and secrets will no longer be stored in a plaintext file on your system if you use this command. As access control has been removed, most commands (except `token user`, `token client`, `token revoke`, `token introspect`) work without supplying any credentials at all. The listed exceptions support setting an OAuth 2.0 Client ID and Client Secret using flags `--client-id` and `--client-secret` or environment variables `OAUTH2CLIENTID` and `OAUTH2CLIENTSECRET`. All other commands, such as `hydra clients create`, still support scenarios where you would need an OAuth2 Access Token. In those cases, you can supply the access token using flag `--access-token` or environment variable `OAUTH2ACCESSTOKEN`. Assuming that you would like to automate management in a protected scenario, you could do something like this: ``` $ token=$(hydra token client --client-id foo --client-secret bar --endpoint http://foobar) $ hydra clients create --access-token $token ... ``` All commands now support the `--endpoint` flag which sets the `HYDRA_URL` in case you don't want to use environment variables. Flags `--id` and `--secret` are now called `--client-id` and `--client-secret`. Flags `--client-id` and `--client-secret` have been added. Flag `--scopes` has been renamed to `--scope`. This command has been renamed to `hydra token introspect` to properly reflect that you are performing OAuth 2.0 Token Introspection. Flags `--client-id` and `--client-secret` have been added. Flag `--scopes` has been renamed to `--scope`. As OAuth 2.0 specifies that terminology `scope` does not have a plural `scopes`, we updated the places where the incorrect `scopes` was used in order to provide a more consistent developer experience. This command renamed flag `--allowed-scopes` to `--scope`. This command is a relict of an old version of ORY Hydra which is, according to our metrics, not being used any more. This command has moved to Keto. All commands work the same way, but you have to have Keto installed and replace `hydra` with `keto`. For example `hydra policies create ...` is now `keto policies create ...` This command has moved to Keto. All commands work the same way, but you have to have Keto installed and replace `hydra groups` with `keto roles`. For example `hydra groups create ...` is now `keto roles create ...` As the SDK is code-generated, and we are not specialists in every language, we have only documented changes to the Go API. Please help improving this section by adding upgrade guides for the SDK you upgraded. The following methods have been moved. The Access Control Policy SDK has moved to ORY Keto: `CreatePolicy(body swagger.Policy) (swagger.Policy,

error)` is now available via `github.com/ory/keto/sdk/go/keto`. The method signature has not changed, apart from types `github.com/ory/hydra/sdk/go/hydra/swagger` now being included from `github.com/ory/keto/sdk/go/keto/swagger`. `DeletePolicy(id string) (*swagger.APIResponse, error)` is now available via `github.com/ory/keto/sdk/go/keto`. The method signature has not changed, apart from types `github.com/ory/hydra/sdk/go/hydra/swagger` now being included from `github.com/ory/keto/sdk/go/keto/swagger`. `GetPolicy(id string) (swagger.Policy, swagger.APIResponse, error)` is now available via `github.com/ory/keto/sdk/go/keto`. The method signature has not changed, apart from types `github.com/ory/hydra/sdk/go/hydra/swagger` now being included from `github.com/ory/keto/sdk/go/keto/swagger`. `ListPolicies(offset int64, limit int64) ([]swagger.Policy, *swagger.APIResponse, error)` is now available via `github.com/ory/keto/sdk/go/keto`. The method signature has not changed, apart from types `github.com/ory/hydra/sdk/go/hydra/swagger` now being included from `github.com/ory/keto/sdk/go/keto/swagger`. `UpdatePolicy(id string, body swagger.Policy) (swagger.Policy, swagger.APIResponse, error)` is now available via `github.com/ory/keto/sdk/go/keto`. The method signature has not changed, apart from types `github.com/ory/hydra/sdk/go/hydra/swagger` now being included from `github.com/ory/keto/sdk/go/keto/swagger`. The Warden Group SDK has moved to Keto: `AddMembersToGroup(id string, body swagger.GroupMembers) (*swagger.APIResponse, error)` is now `AddMembersToRole(id string, body swagger.RoleMembers) (*swagger.APIResponse, error)` and is now available via `github.com/ory/keto/sdk/go/keto`. `CreateGroup(body swagger.Group) (swagger.Group, swagger.APIResponse, error)` is now `CreateRole(body swagger.Role) (swagger.Role, swagger.APIResponse, error` and is now available via `github.com/ory/keto/sdk/go/keto`. `DeleteGroup(id string) (*swagger.APIResponse, error)` is now `DeleteRole(id string) (*swagger.APIResponse, error)` and is now available via `github.com/ory/keto/sdk/go/keto`. `ListGroups(member string, limit, offset int64) ([]swagger.Group, *swagger.APIResponse, error)` is now `ListRoles(member string, limit int64, offset int64) ([]swagger.Role, *swagger.APIResponse, error)` and is now available via `github.com/ory/keto/sdk/go/keto`. `GetGroup(id string) (swagger.Group, swagger.APIResponse, error)` is now `GetRole(id string) (swagger.Role, swagger.APIResponse, error)` and is now available via `github.com/ory/keto/sdk/go/keto`. `RemoveMembersFromGroup(id string, body swagger.GroupMembers) (*swagger.APIResponse, error)` is now `RemoveMembersFromRole(id string, body swagger.RoleMembers) (*swagger.APIResponse, error)` and is now available via `github.com/ory/keto/sdk/go/keto`. The Warden API SDK has moved to Keto: `DoesWardenAllowAccessRequest(body swagger.WardenAccessRequest) (swagger.WardenAccessRequestResponse, swagger.APIResponse, error)` is now `IsSubjectAuthorized(body swagger.WardenSubjectAuthorizationRequest) (swagger.WardenSubjectAuthorizationResponse, swagger.APIResponse, error)`. Please check out the changes to the request/response body as well. `DoesWardenAllowTokenAccessRequest(body swagger.WardenTokenAccessRequest) (swagger.WardenTokenAccessRequestResponse, swagger.APIResponse, error)` is now `IsOAuth2AccessTokenAuthorized(body swagger.WardenOAuth2AccessTokenAuthorizationRequest) (swagger.WardenOAuth2AccessTokenAuthorizationResponse, swagger.APIResponse, error)`. Please check out the changes to the request/response body as well. The Consent API SDK has been deprecated: `AcceptOAuth2ConsentRequest(id string, body swagger.ConsentRequestAcceptance) (*swagger.APIResponse, error)` has been removed without replacement. `GetOAuth2ConsentRequest(id string) (swagger.OAuth2ConsentRequest, swagger.APIResponse, error)` has been removed without replacement. `RejectOAuth2ConsentRequest(id string, body swagger.ConsentRequestRejection) (*swagger.APIResponse, error)` has been removed without replacement. The Login & Consent API SDK has been added: `AcceptConsentRequest(challenge string, body swagger.AcceptConsentRequest) (swagger.CompletedRequest, swagger.APIResponse, error)` `AcceptLoginRequest(challenge string, body swagger.AcceptLoginRequest) (swagger.CompletedRequest, swagger.APIResponse, error)` `RejectConsentRequest(challenge string, body swagger.RejectRequest) (swagger.CompletedRequest, swagger.APIResponse, error)` `RejectLoginRequest(challenge string, body swagger.RejectRequest) (swagger.CompletedRequest, swagger.APIResponse, error)` `GetLoginRequest(challenge string) (swagger.LoginRequest, swagger.APIResponse, error)` `GetConsentRequest(challenge string) (swagger.ConsentRequest, swagger.APIResponse, error)` Additionally, the following methods have been removed as they were of very little use and also mixed the Client Credentials flow with the Authorize Code Flow which lead to weird usage. It's much easier to configure `clientcredentials.Config` or `oauth2.Config` yourself. `GetOAuth2ClientConfig() (*clientcredentials.Config)` `GetOAuth2Config() (*oauth2.Config)` The health check endpoint has moved from `/health/status` to `/health/alive`. We set up a 308 redirect from `/health/status` to `/health/alive` so this should not cause any issues. The `/health/alive` endpoint returns `200 OK` as soon as the HTTP server is responsive. Another endpoint `/health/ready` was added which returns `200 OK` only if the database connection is working as well. As part of this change, function `getInstanceStatus` of the SDK is now `isInstanceAlive` and `isInstanceReady`. Previously, if you had a typo in the JSON (e.g. `client_nme` instead of `client_name`), ORY Hydra simply ignored that key. Now, an error is thrown if unknown JSON keys are included. ORY Hydra now uses UTC everywhere, reducing the possibility of errors stemming from different timezones. Each endpoint that returns a list of items now supports pagination using `limit` and `offset` query

An endpoint (`/oauth2/flush`) has been added that allows you to flush old access tokens. An endpoint `/health/prometheus` for providing data to Prometheus has been added. This release resolves a security issue (reported by ) related to the fosite storage implementation in this project. Fosite used to pass all of the request body from both authorize and token endpoints to the storage adapters. As some of these values are needed in consecutive requests, the storage adapter of this project chose to drop all of the key/value pairs to the database in plaintext. This implied that confidential parameters, such as the `client_secret` which can be passed in the request body since fosite version 0.15.0, were stored as key/value pairs in plaintext in the database. While most client secrets are generated programmatically (as opposed to set by the user) and most popular OAuth2 providers choose to store the secret in plaintext for later retrieval, we see it as a considerable security issue nonetheless. The issue has been resolved by sanitizing the request body and only including those values truly required by their respective handlers. This also implies that typos (eg `client_secet`) won't "leak" to the database. There are no special upgrade paths required for this version. This issue does not apply to you if you do not use an SQL backend. If you do upgrade to this version, you need to run `hydra migrate sql path://to.your/database`. If your users use POST body client authentication, it might be a good move to remove old data. There are multiple ways of doing that. Back up your data before you do this: Radical solution: Drop all rows from tables `hydraoauth2refresh`, `hydraoauth2access`, `hydraoauth2oidc`, `hydraoauth2code`. This implies that all your users have to re-authorize. Sensitive solution: Replace all values in column `form_data` in tables `hydraoauth2refresh`, `hydraoauth2access` with an empty string. This will keep all authorization sessions alive. Tables `hydraoauth2oidc` and `hydraoauth2code` do not contain sensitive information, unless your users accidentally sent the client_secret to the `/oauth2/auth` endpoint. We would like to thank for sponsoring the development of a patch that resolves this issue. The experimental endpoint `/health/metrics` has been removed as it caused various issues such as increased memory usage, and it was apparently not used at all. This release has a minor breaking change in the experimental Warden Group SDK: `FindGroupsByMember(member string) ([]swagger.Group, *swagger.APIResponse, error)` is now `ListGroups(member string, limit, offset int64) ([]swagger.Group, *swagger.APIResponse, error)`. The change has to be applied in a similar fashion to other SDKs generated using swagger. Leave the `member` parameter empty to list all groups, and add it to filter groups by member id. This release has several major improvements, and some breaking changes. It focuses on cryptographic security by leveraging best practices that emerged within the last one and a half years. Before upgrading to this version, make a back up of the JWK table in your SQL database. This release requires running `hydra migrate sql` before `hydra host`. The most important breaking changes are the SDK libraries, the new consent flow, the AES-GCM improvement, and the response payload changes to the warden. We know that these are a lot of changes, but we highly recommend upgrading to this version. It will be the last before releasing 1.0.0. The introspection endpoint was previously accessible to anyone with valid client credentials or a valid access token. According to spec, the introspection endpoint should be protected by additional access control

This version introduces new access control requirements for this endpoint. The client id of the basic authorization / subject of the bearer token must be allowed action `introspect` on resource `rn:hydra:oauth2:tokens`. If an access token is used for authorization, it needs to be granted the `hydra.introspect` scope. Previously, the consent flow looked roughly like this: App asks user for Authorization by generating the authorization URL (http://hydra.mydomain.com/oauth2/auth?client_id=...). Hydra asks browser of user for authentication by redirecting to the Consent App with a consent challenge (http://login.mydomain.com/login?challenge=xYt...). Retrieves a RSA 256 public key from Hydra. Uses said public key to verify the consent challenge. User logs in and authorizes the requested scopes Consent app generates the consent response Retrieves a private key from Hydra which is used to sign the consent response. Creates a response message and sign with said private key. Redirects the browser back to Hydra, appending the consent response (http://hydra.mydomain.com/oauth2/auth?client_id=...&consent=zxI...). Hydra validates consent response and generates access tokens, authorize codes, refresh tokens, and id tokens. This approach had several disadvantages: Validating and generating the JSON Web Tokens (JWTs) requires libraries for each language Because libraries are required, auto generating SDKs from the swagger spec is impossible. Thus, every language requires a maintained SDK which significantly increases our workload. There have been at least two major bugs affecting almost all JWT libraries for any language. The spec has been criticised for it's mushy language. The private key used by the consent app for signing consent responses was originally thought to be stored at the consent app, not in Hydra. However, since Hydra offers JWK storage, it was decided to use the Hydra JWK store per default for retrieval of the private key to improve developer experience. However, to make really sense, the private key should have been stored at the consent app, not in Hydra. Private/Public keypairs need to be fetched on every request or cached in a way that allows for key rotation, complicating the consent app. There is currently no good mechanism for rotating JWKs in Hydra's storage. The consent challenge / response has a limited length as it's transmitted via the URL query. The length of a URL is limited. Due to these reasons we decided to refactor the consent flow. Instead of relying on JWTs using RSA256, a simple HTTP call is now enough to confirm a consent request: App asks user for Authorization by generating the authorization URL (http://hydra.mydomain.com/oauth2/auth?client_id=...). Hydra asks browser of user for authentication by redirecting to the Consent App with a unique consent request id (http://login.mydomain.com/login?consent=fjad2312). Consent app makes a HTTP REST request to `http://hydra.mydomain.com/oauth2/consent/requests/fjad2312` and retrieves information on the authorization request. User logs in and authorizes the requested scopes Consent app accepts or denies the consent request by making a HTTP REST request to `http://hydra.mydomain.com/oauth2/consent/requests/fjad2312/accept` or `http://hydra.mydomain.com/oauth2/consent/requests/fjad2312/reject`. Redirects the browser back to Hydra. Hydra validates consent request by checking if it was accepted and generates access tokens, authorize codes, refresh tokens, and id tokens. Learn more on how the new consent flow works in the guide: https://ory.gitbooks.io/hydra/content/oauth2.html#consent-flow Previously, the audience terminology was used as a synonym for OAuth2 client IDs. This is no longer the case. The audience is typically a URL identifying the endpoint(s) the token is intended for. For example, if a client requires access to endpoint `http://mydomain.com/users`, then the audience would be

This changes the payload of `/warden/token/allowed` and is incorporated in the new consent flow as well. Please note that it is currently not possible to set the audience of a token. This feature is tracked with . IMPORTANT NOTE: In OpenID Connect ID Tokens, the token is issued for that client. Thus, the `aud` claim must equal to the `client_id` that initiated the request. Previously, the response of the warden endpoint contained shorthands like `aud`, `iss`, and so on. Those have now been changed to their full names: `sub` is now named `subject`. `scopes` is now named `grantedScopes`. `iss` is now named `issuer`. `aud` is now named `clientId`. `iat` is now named `issuedAt`. `exp` is now named `expiresAt`. `ext` is now named `accessTokenExtra`. The Go SDK was completely replaced in favor of a SDK based on `swagger-codegen`. Unfortunately this means that any code relying on the old SDK has to be replaced. On the bright side the dependency tree is much smaller as no direct dependencies to ORY Hydra's code base exist any more. Read more on it here: https://ory.gitbooks.io/hydra/content/sdk/go.html `GET /health` is now `GET /health/status` `GET /health/stats` is now `GET /health/metrics` `GET /warden/groups` now returns a list of groups, not just a list of strings (group ids). The previous scope matching strategy has been replaced in favor of a wildcard-based matching strategy. Previously, `foo` matched `foo` and `foo.bar` and `foo.baz`. This is no longer the case. So `foo` matches only `foo`. Matching subsets is possible using wildcards. `foo.*` matches `foo.bar` and `foo.baz`. This change makes setting scopes more explicit and is more secure, as it is less likely to make mistakes. Read more on this strategy . To fall back to hierarchical scope matching, set the environment variable `SCOPESTRATEGY=DEPRECATEDHIERARCHICALSCOPESTRATEGY`. This feature might be fully removed in a later version. Our use of `crypto/aes`'s AES-GCM was replaced in favor of . As this includes a change of how nonces are appended to the ciphertext, ORY Hydra will be unable to decipher existing databases. There are two paths to migrate this change: If you have not added any keys to the JWK store: Stop all Hydra instances. Drop all rows from the `hydra_jwk` table. Start one Hydra instance and wait for it to boot. Restart all remaining Hydra instances. If you added keys to the JWK store: If you can afford to re-generate those keys: Write down all key ids you generated. Stop all Hydra instances. Drop all rows from the `hydra_jwk` table. Start one Hydra instance and wait for it to boot. Restart all remaining Hydra instances. Regenerate the keys and use the key ids you wrote down. If you can not afford to re-generate the keys: Export said keys using the REST API. Stop all Hydra instances. Drop all rows from the `hydra_jwk` table. Start one Hydra instance and wait for it to boot. Restart all remaining Hydra instances. Import said keys using the REST API. The signature algorithm used to generate authorize codes, access tokens, and refresh tokens has been upgraded from HMAC-SHA256 to HMAC-SHA512. With upgrading to alpha.9, all previously issued authorize codes, access tokens, and refresh will thus be rendered invalid. Apart from some re-authorization procedures, which are usually automated, this should not have any significant impact on your installation. The HS256 (symmetric/shared keys) JWK Generator now uses the full 256 bit range to generate secrets instead of a predefined rune sequence. This change only affects keys generated in the

The JWK algorithm `ES521` was renamed to `ES512`. If you want to generate a key using this algorithm, you have to use the update name in the future. This release removes build tags `-http`, `-automigrate`, `-without-telemetry` from the docker hub repository and replaces it with a new and tiny (~6MB) docker image containing the binary only. Please note that this docker image does not have a shell, which makes it harder to penetrate. Instead of relying on tags to pass arguments, it is now possible to pass command arguments such as `docker run oryd/hydra:v0.10.0 host --dangerous-force-http` directly. Version 0.10.8 reintroduces an image with a shell, appended with tag `-alpine`. It is now possible to alter resource name prefixes (`rn:hydra`) using the `RESOURCENAMEPREFIX` environment variable. It is now possible to refresh openid connect tokens using the refresh_token grant. An ID Token is issued if the scope `openid` was requested, and the client is allowed to receive an ID Token. To improve ORY Hydra and understand how the software is used, optional, anonymized telemetry data is shared with ORY. A change was made to help us understand which telemetry sources belong to the same installation by hashing (SHA256) two environment variables which make up a unique identifier. to read more about how we collect telemetry data, why we do it, and how to enable or disable it. This release adds the possibility to specify special characters in the `FORCEROOTCLIENT_CREDENTIALS` by `www-url-decoding` the values. If you have characters that are not url safe in your root client credentials, please use the following form to specify them: `"FORCEROOTCLIENT_CREDENTIALS=urlencode(id):urlencode(secret)"`. This version adds performance metrics to `/health` and sends anonymous usage statistics to our servers, for more details on this feature and how to disable it. This PR improves some performance bottlenecks, offers more control over Hydra, moves to Go 1.8, and moves the REST documentation to swagger. Before applying this update, please make a back up of your database. Do not upgrade directly from versions below 0.7.0. To upgrade the database schemas, please run the following commands in exactly this order ```sh $ hydra help migrate sql $ hydra help migrate ladon ``` ```sh $ hydra migrate sql mysql://... $ hydra migrate ladon 0.6.0 mysql://... ``` Ladon was greatly improved with version 0.6.0, resolving various performance bottlenecks. Please read more on this release . Redis and RethinkDB are removed from the repository now and no longer supported, see . To reflect the GitHub organization rename, Hydra was moved from `https://github.com/ory-am/hydra` to `https://github.com/ory/hydra`. The method `FindPoliciesForSubject` of the policy SDK was removed. Instead, `List` was added. The HTTP endpoint `GET /policies` no longer allows to query by subject. To generate JWKs previously the payload at `POST /keys` was `{ "alg": "...", "id": "some-id" }`. `id` was changed to `kid` so this is now `{ "alg": "...", "kid": "some-id" }`. SQL Migrations are no longer automatically applied. Instead you need to run `hydra migrate sql` after upgrading to a Hydra version that includes a breaking schema change. Set the log format to json using `export LOG_FORMAT=json` You can configure SQL connection limits by appending parameters `max_conns`, `maxidleconns`, or `maxconnlifetime` to the DSN: `postgres://foo:bar@host:port/database?max_conns=12`. ... and are swagger 2.0 spec. Documentation on scopes (e.g. offline) was added. Hydra now uses `github.com/ory/herodot` for writing REST responses. This increases compatibility with other libraries and resolves a few other issues. Hydra is now capable of gracefully handling SIGINT. Hydra now implements best practices for running HTTP servers that are exposed to the public internet.