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---
title: "OpenID Connect"
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description: "An introduction into integrating the Authelia OpenID Connect 1.0 Provider with an OpenID Connect 1.0 Relying Party"
lead: "An introduction into integrating the Authelia OpenID Connect 1.0 Provider with an OpenID Connect 1.0 Relying Party."
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date: 2022-06-15T17:51:47+10:00
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draft: false
images: []
menu:
integration:
parent: "openid-connect"
weight: 610
toc: true
aliases:
- /docs/community/oidc-integrations.html
---
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Authelia can act as an [OpenID Connect 1.0] Provider as part of an open beta. This section details implementation
specifics that can be used for integrating Authelia with an [OpenID Connect 1.0] Relying Party, as well as specific
documentation for some [OpenID Connect 1.0] Relying Party implementations.
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See the [OpenID Connect 1.0 Provider ](../../configuration/identity-providers/openid-connect/provider.md ) and
[OpenID Connect 1.0 Clients ](../../configuration/identity-providers/openid-connect/clients.md ) configuration guides for
information on how to configure the Authelia [OpenID Connect 1.0] Provider (note the clients guide is for configuring
the registered clients in the provider).
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This page is intended as an integration reference point for any implementers who wish to integrate an
[OpenID Connect 1.0] Relying Party (client application) either as a developer or user of the third party Reyling Party.
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## Scope Definitions
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The following scope definitions describe each scope supported and the associated effects including the individual claims
returned by granting this scope. By default we do not issue any claims which reveal the users identity which allows
administrators semi-granular control over which claims the client is entitled to.
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### openid
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This is the default scope for [OpenID Connect 1.0]. This field is forced on every client by the configuration validation
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that Authelia does.
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*__Important Note:__ The subject identifiers or `sub` [Claim] has been changed to a [RFC4122] UUID V4 to identify the
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individual user as per the [Subject Identifier Types] section of the [OpenID Connect 1.0] specification. Please use the
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`preferred_username` [Claim] instead.*
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| [Claim] | JWT Type | Authelia Attribute | Description |
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|:---------:|:-------------:|:------------------:|:-----------------------------------------------------------:|
| iss | string | hostname | The issuer name, determined by URL |
| jti | string(uuid) | *N/A* | A [RFC4122] UUID V4 representing the JWT Identifier |
| rat | number | *N/A* | The time when the token was requested |
| exp | number | *N/A* | Expires |
| iat | number | *N/A* | The time when the token was issued |
| auth_time | number | *N/A* | The time the user authenticated with Authelia |
| sub | string(uuid) | opaque id | A [RFC4122] UUID V4 linked to the user who logged in |
| scope | string | scopes | Granted scopes (space delimited) |
| scp | array[string] | scopes | Granted scopes |
| aud | array[string] | *N/A* | Audience |
| amr | array[string] | *N/A* | An [RFC8176] list of authentication method reference values |
| azp | string | id (client) | The authorized party |
| client_id | string | id (client) | The client id |
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### offline_access
This scope is a special scope designed to allow applications to obtain a [Refresh Token] which allows extended access to
an application on behalf of a user. A [Refresh Token] is a special [Access Token] that allows refreshing previously
issued token credentials, effectively it allows the relying party to obtain new tokens periodically.
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As per [OpenID Connect 1.0] Section 11 [Offline Access] can only be granted during the [Authorization Code Flow] or a
[Hybrid Flow]. The [Refresh Token] will only ever be returned at the [Token Endpoint] when the client is exchanging
their [OAuth 2.0 Authorization Code].
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Generally unless an application supports this and actively requests this scope they should not be granted this scope via
the client configuration.
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It is also important to note that we treat a [Refresh Token] as single use and reissue a new [Refresh Token] during the
refresh flow.
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### groups
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This scope includes the groups the authentication backend reports the user is a member of in the [Claims] of the
[ID Token].
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| [Claim] | JWT Type | Authelia Attribute | Description |
|:-------:|:-------------:|:------------------:|:-------------------------------------------------------------------------------------------------------:|
| groups | array[string] | groups | List of user's groups discovered via [authentication ](../../configuration/first-factor/introduction.md ) |
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### email
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This scope includes the email information the authentication backend reports about the user in the [Claims] of the
[ID Token].
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| Claim | JWT Type | Authelia Attribute | Description |
|:--------------:|:-------------:|:------------------:|:---------------------------------------------------------:|
| email | string | email[0] | The first email address in the list of emails |
| email_verified | bool | *N/A* | If the email is verified, assumed true for the time being |
| alt_emails | array[string] | email[1:] | All email addresses that are not in the email JWT field |
### profile
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This scope includes the profile information the authentication backend reports about the user in the [Claims] of the
[ID Token].
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| Claim | JWT Type | Authelia Attribute | Description |
|:------------------:|:--------:|:------------------:|:----------------------------------------:|
| preferred_username | string | username | The username the user used to login with |
| name | string | display_name | The users display name |
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## Signing and Encryption Algorithms
[OpenID Connect 1.0] and OAuth 2.0 support a wide variety of signature and encryption algorithms. Authelia supports
a subset of these.
### Response Object
Authelia's response objects can have the following signature algorithms:
| Algorithm | Key Type | Hashing Algorithm | Use | JWK Default Conditions | Notes |
|:---------:|:-----------:|:-----------------:|:---------:|:--------------------------------------------:|:----------------------------------------------------:|
| RS256 | RSA | SHA-256 | Signature | RSA Private Key without a specific algorithm | Requires an RSA Private Key with 2048 bits or more |
| RS384 | RSA | SHA-384 | Signature | N/A | Requires an RSA Private Key with 2048 bits or more |
| RS512 | RSA | SHA-512 | Signature | N/A | Requires an RSA Private Key with 2048 bits or more |
| ES256 | ECDSA P-256 | SHA-256 | Signature | ECDSA Private Key with the P-256 curve | |
| ES384 | ECDSA P-384 | SHA-384 | Signature | ECDSA Private Key with the P-384 curve | |
| ES512 | ECDSA P-521 | SHA-512 | Signature | ECDSA Private Key with the P-521 curve | Requires an ECDSA Private Key with 2048 bits or more |
| PS256 | RSA (MGF1) | SHA-256 | Signature | N/A | Requires an RSA Private Key with 2048 bits or more |
| PS384 | RSA (MGF1) | SHA-384 | Signature | N/A | Requires an RSA Private Key with 2048 bits or more |
| PS512 | RSA (MGF1) | SHA-512 | Signature | N/A | Requires an RSA Private Key with 2048 bits or more |
### Request Object
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Authelia accepts a wide variety of request object types.
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| Algorithm | Key Type | Hashing Algorithm | Use | Notes |
|:---------:|:------------------:|:-----------------:|:---------:|:--------------------------------------------------:|
| none | None | None | N/A | N/A |
| HS256 | HMAC Shared Secret | SHA-256 | Signature | [Client Authentication Method] `client_secret_jwt` |
| HS384 | HMAC Shared Secret | SHA-384 | Signature | [Client Authentication Method] `client_secret_jwt` |
| HS512 | HMAC Shared Secret | SHA-512 | Signature | [Client Authentication Method] `client_secret_jwt` |
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| RS256 | RSA | SHA-256 | Signature | [Client Authentication Method] `private_key_jwt` |
| RS384 | RSA | SHA-384 | Signature | [Client Authentication Method] `private_key_jwt` |
| RS512 | RSA | SHA-512 | Signature | [Client Authentication Method] `private_key_jwt` |
| ES256 | ECDSA P-256 | SHA-256 | Signature | [Client Authentication Method] `private_key_jwt` |
| ES384 | ECDSA P-384 | SHA-384 | Signature | [Client Authentication Method] `private_key_jwt` |
| ES512 | ECDSA P-521 | SHA-512 | Signature | [Client Authentication Method] `private_key_jwt` |
| PS256 | RSA (MFG1) | SHA-256 | Signature | [Client Authentication Method] `private_key_jwt` |
| PS384 | RSA (MFG1) | SHA-384 | Signature | [Client Authentication Method] `private_key_jwt` |
| PS512 | RSA (MFG1) | SHA-512 | Signature | [Client Authentication Method] `private_key_jwt` |
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[Client Authentication Method]: #client -authentication-method
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## Parameters
The following section describes advanced parameters which can be used in various endpoints as well as their related
configuration options.
### Response Types
The following describes the supported response types. See the [OAuth 2.0 Multiple Response Type Encoding Practices] for
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more technical information. The default response modes column indicates which response modes are allowed by default on
clients configured with this flow type value. If more than a single response type is configured
| Flow Type | Value | Default [Response Modes ](#response-modes ) Values |
|:-------------------------:|:---------------------:|:------------------------------------------------:|
| [Authorization Code Flow] | `code` | `form_post` , `query` |
| [Implicit Flow] | `id_token token` | `form_post` , `fragment` |
| [Implicit Flow] | `id_token` | `form_post` , `fragment` |
| [Implicit Flow] | `token` | `form_post` , `fragment` |
| [Hybrid Flow] | `code token` | `form_post` , `fragment` |
| [Hybrid Flow] | `code id_token` | `form_post` , `fragment` |
| [Hybrid Flow] | `code id_token token` | `form_post` , `fragment` |
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[Authorization Code Flow]: https://openid.net/specs/openid-connect-core-1_0.html#CodeFlowAuth
[Implicit Flow]: https://openid.net/specs/openid-connect-core-1_0.html#ImplicitFlowAuth
[Hybrid Flow]: https://openid.net/specs/openid-connect-core-1_0.html#HybridFlowAuth
[OAuth 2.0 Multiple Response Type Encoding Practices]: https://openid.net/specs/oauth-v2-multiple-response-types-1_0.html
### Response Modes
The following describes the supported response modes. See the [OAuth 2.0 Multiple Response Type Encoding Practices] for
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more technical information. The default response modes of a client is based on the [Response Types ](#response-types )
configuration.
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| Name | Value |
|:---------------------:|:-----------:|
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| [OAuth 2.0 Form Post] | `form_post` |
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| Query String | `query` |
| Fragment | `fragment` |
[OAuth 2.0 Form Post]: https://openid.net/specs/oauth-v2-form-post-response-mode-1_0.html
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### Grant Types
The following describes the various [OAuth 2.0] and [OpenID Connect 1.0] grant types and their support level. The value
field is both the required value for the `grant_type` parameter in the authorization request and the `grant_types`
configuration option.
| Grant Type | Supported | Value | Notes |
|:-----------------------------------------------:|:---------:|:----------------------------------------------:|:-----------------------------------------------------------------------------------------------:|
| [OAuth 2.0 Authorization Code] | Yes | `authorization_code` | |
| [OAuth 2.0 Resource Owner Password Credentials] | No | `password` | This Grant Type has been deprecated and should not normally be used |
| [OAuth 2.0 Client Credentials] | No | `client_credentials` | |
| [OAuth 2.0 Implicit] | Yes | `implicit` | This Grant Type has been deprecated and should not normally be used |
| [OAuth 2.0 Refresh Token] | Yes | `refresh_token` | This Grant Type should genreally only be used for clients which have the `offline_access` scope |
| [OAuth 2.0 Device Code] | No | `urn:ietf:params:oauth:grant-type:device_code` | |
|
[OAuth 2.0 Authorization Code]: https://datatracker.ietf.org/doc/html/rfc6749#section-1.3.1
[OAuth 2.0 Implicit]: https://datatracker.ietf.org/doc/html/rfc6749#section-1.3.2
[OAuth 2.0 Resource Owner Password Credentials]: https://datatracker.ietf.org/doc/html/rfc6749#section-1.3.3
[OAuth 2.0 Client Credentials]: https://datatracker.ietf.org/doc/html/rfc6749#section-1.3.4
[OAuth 2.0 Refresh Token]: https://datatracker.ietf.org/doc/html/rfc6749#section-1.5
[OAuth 2.0 Device Code]: https://datatracker.ietf.org/doc/html/rfc8628#section-3.4
### Client Authentication Method
The following describes the supported client authentication methods. See the [OpenID Connect 1.0 Client Authentication]
specification and the [OAuth 2.0 - Client Types] specification for more information.
| Description | Value / Name | Supported Client Types | Default for Client Type | Assertion Type |
|:------------------------------------:|:-----------------------------:|:----------------------:|:-----------------------:|:--------------------------------------------------------:|
| Secret via HTTP Basic Auth Scheme | `client_secret_basic` | `confidential` | N/A | N/A |
| Secret via HTTP POST Body | `client_secret_post` | `confidential` | N/A | N/A |
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| JWT (signed by secret) | `client_secret_jwt` | `confidential` | N/A | `urn:ietf:params:oauth:client-assertion-type:jwt-bearer` |
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| JWT (signed by private key) | `private_key_jwt` | `confidential` | N/A | `urn:ietf:params:oauth:client-assertion-type:jwt-bearer` |
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| [OAuth 2.0 Mutual-TLS] | `tls_client_auth` | Not Supported | N/A | N/A |
| [OAuth 2.0 Mutual-TLS] (Self Signed) | `self_signed_tls_client_auth` | Not Supported | N/A | N/A |
| No Authentication | `none` | `public` | `public` | N/A |
[OpenID Connect 1.0 Client Authentication]: https://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication
[OAuth 2.0 Mutual-TLS]: https://datatracker.ietf.org/doc/html/rfc8705
[OAuth 2.0 - Client Types]: https://datatracker.ietf.org/doc/html/rfc8705#section-2.1
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## Authentication Method References
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Authelia currently supports adding the `amr` [Claim] to the [ID Token] utilizing the [RFC8176] Authentication Method
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Reference values.
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The values this [Claim] has are not strictly defined by the [OpenID Connect 1.0] specification. As such, some backends may
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expect a specification other than [RFC8176] for this purpose. If you have such an application and wish for us to support
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it then you're encouraged to create a [feature request ](https://www.authelia.com/l/fr ).
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Below is a list of the potential values we place in the [Claim] and their meaning:
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| Value | Description | Factor | Channel |
|:-----:|:----------------------------------------------------------------:|:------:|:--------:|
| mfa | User used multiple factors to login (see factor column) | N/A | N/A |
| mca | User used multiple channels to login (see channel column) | N/A | N/A |
| user | User confirmed they were present when using their hardware key | N/A | N/A |
| pin | User confirmed they are the owner of the hardware key with a pin | N/A | N/A |
| pwd | User used a username and password to login | Know | Browser |
| otp | User used TOTP to login | Have | Browser |
| hwk | User used a hardware key to login | Have | Browser |
| sms | User used Duo to login | Have | External |
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## User Information Signing Algorithm
The following table describes the response from the [UserInfo] endpoint depending on the
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[userinfo_signing_alg ](../../configuration/identity-providers/openid-connect/clients.md#userinfosigningalg ).
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| Signing Algorithm | Encoding | Content Type |
|:-----------------:|:------------:|:-----------------------------------:|
| `none` | JSON | `application/json; charset="UTF-8"` |
| `RS256` | JWT (Signed) | `application/jwt; charset="UTF-8"` |
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## Endpoint Implementations
The following section documents the endpoints we implement and their respective paths. This information can
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traditionally be discovered by relying parties that utilize [OpenID Connect Discovery 1.0], however this information may be
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useful for clients which do not implement this.
The endpoints can be discovered easily by visiting the Discovery and Metadata endpoints. It is recommended regardless
of your version of Authelia that you utilize this version as it will always produce the correct endpoint URLs. The paths
for the Discovery/Metadata endpoints are part of IANA's well known registration but are also documented in a table
below.
These tables document the endpoints we currently support and their paths in the most recent version of Authelia. The
paths are appended to the end of the primary URL used to access Authelia. The tables use the url
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https://auth.example.com as an example of the Authelia root URL which is also the OpenID Connect 1.0 Issuer.
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### Well Known Discovery Endpoints
These endpoints can be utilized to discover other endpoints and metadata about the Authelia OP.
| Endpoint | Path |
|:-----------------------------------------:|:---------------------------------------------------------------:|
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| [OpenID Connect Discovery 1.0] | https://auth.example.com/.well-known/openid-configuration |
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| [OAuth 2.0 Authorization Server Metadata] | https://auth.example.com/.well-known/oauth-authorization-server |
### Discoverable Endpoints
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These endpoints implement OpenID Connect 1.0 Provider specifications.
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| Endpoint | Path | Discovery Attribute |
|:-------------------------------:|:--------------------------------------------------------------:|:-------------------------------------:|
| [JSON Web Key Set] | https://auth.example.com/jwks.json | jwks_uri |
| [Authorization] | https://auth.example.com/api/oidc/authorization | authorization_endpoint |
| [Pushed Authorization Requests] | https://auth.example.com/api/oidc/pushed-authorization-request | pushed_authorization_request_endpoint |
| [Token] | https://auth.example.com/api/oidc/token | token_endpoint |
| [UserInfo] | https://auth.example.com/api/oidc/userinfo | userinfo_endpoint |
| [Introspection] | https://auth.example.com/api/oidc/introspection | introspection_endpoint |
| [Revocation] | https://auth.example.com/api/oidc/revocation | revocation_endpoint |
## Security
The following information covers some security topics some users may wish to be familiar with.
#### Pushed Authorization Requests Endpoint
The [Pushed Authorization Requests] endpoint is discussed in depth in [RFC9126] as well as in the
[OAuth 2.0 Pushed Authorization Requests ](https://oauth.net/2/pushed-authorization-requests/ ) documentation.
Essentially it's a special endpoint that takes the same parameters as the [Authorization] endpoint (including
[Proof Key Code Exchange ](#proof-key-code-exchange )) with a few caveats:
1. The same [Client Authentication] mechanism required by the [Token] endpoint **MUST** be used.
2. The request **MUST** use the [HTTP POST method].
3. The request **MUST** use the `application/x-www-form-urlencoded` content type (i.e. the parameters **MUST** be in the
body, not the URI).
4. The request **MUST** occur over the back-channel.
The response of this endpoint is a JSON Object with two key-value pairs:
- `request_uri`
- `expires_in`
The `expires_in` indicates how long the `request_uri` is valid for. The `request_uri` is used as a parameter to the
[Authorization] endpoint instead of the standard parameters (as the `request_uri` parameter).
The advantages of this approach are as follows:
1. [Pushed Authorization Requests] cannot be created or influenced by any party other than the Relying Party (client).
2. Since you can force all [Authorization] requests to be initiated via [Pushed Authorization Requests] you drastically
improve the authorization flows resistance to phishing attacks (this can be done globally or on a per-client basis).
3. Since the [Pushed Authorization Requests] endpoint requires all of the same [Client Authentication] mechanisms as the
[Token] endpoint:
1. Clients using the confidential [Client Type] can't have [Pushed Authorization Requests] generated by parties who do not
have the credentials.
2. Clients using the public [Client Type] and utilizing [Proof Key Code Exchange ](#proof-key-code-exchange ) never
transmit the verifier over any front-channel making even the `plain` challenge method relatively secure.
#### Proof Key Code Exchange
The [Proof Key Code Exchange] mechanism is discussed in depth in [RFC7636] as well as in the
[OAuth 2.0 Proof Key Code Exchange ](https://oauth.net/2/pkce/ ) documentation.
Essentially a random opaque value is generated by the Relying Party and optionally (but recommended) passed through a
SHA256 hash. The original value is saved by the Relying Party, and the hashed value is sent in the [Authorization]
request in the `code_verifier` parameter with the `code_challenge_method` set to `S256` (or `plain` using a bad practice
of not hashing the opaque value).
When the Relying Party requests the token from the [Token] endpoint, they must include the `code_verifier` parameter
again (in the body), but this time they send the value without it being hashed.
The advantages of this approach are as follows:
1. Provided the value was hashed it's certain that the Relying Party which generated the authorization request is the
same party as the one requesting the token or is permitted by the Relying Party to make this request.
2. Even when using the public [Client Type] there is a form of authentication on the [Token] endpoint.
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[ID Token]: https://openid.net/specs/openid-connect-core-1_0.html#IDToken
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[Access Token]: https://datatracker.ietf.org/doc/html/rfc6749#section-1.4
[Refresh Token]: https://openid.net/specs/openid-connect-core-1_0.html#RefreshTokens
[Claims]: https://openid.net/specs/openid-connect-core-1_0.html#Claims
[Claim]: https://openid.net/specs/openid-connect-core-1_0.html#Claims
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[OpenID Connect 1.0]: https://openid.net/connect/
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[OpenID Connect Discovery 1.0]: https://openid.net/specs/openid-connect-discovery-1_0.html
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[OAuth 2.0 Authorization Server Metadata]: https://datatracker.ietf.org/doc/html/rfc8414
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[JSON Web Key Set]: https://datatracker.ietf.org/doc/html/rfc7517#section-5
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[Offline Access]: https://openid.net/specs/openid-connect-core-1_0.html#OfflineAccess
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[Authorization]: https://openid.net/specs/openid-connect-core-1_0.html#AuthorizationEndpoint
[Token]: https://openid.net/specs/openid-connect-core-1_0.html#TokenEndpoint
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[UserInfo]: https://openid.net/specs/openid-connect-core-1_0.html#UserInfo
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[Pushed Authorization Requests]: https://datatracker.ietf.org/doc/html/rfc9126
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[Introspection]: https://datatracker.ietf.org/doc/html/rfc7662
[Revocation]: https://datatracker.ietf.org/doc/html/rfc7009
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[Proof Key Code Exchange]: https://www.rfc-editor.org/rfc/rfc7636.html
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[Subject Identifier Types]: https://openid.net/specs/openid-connect-core-1_0.html#SubjectIDTypes
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[Client Authentication]: https://datatracker.ietf.org/doc/html/rfc6749#section-2.3
[Client Type]: https://oauth.net/2/client-types/
[HTTP POST method]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST
[Proof Key Code Exchange]: #proof -key-code-exchange
[RFC4122]: https://datatracker.ietf.org/doc/html/rfc4122
[RFC7636]: https://datatracker.ietf.org/doc/html/rfc7636
[RFC8176]: https://datatracker.ietf.org/doc/html/rfc8176
[RFC9126]: https://datatracker.ietf.org/doc/html/rfc9126
