A client may want to invoke on a less trusted application so it may want to downgrade the current token it has. A client may have a need to impersonate a user.
We have extended it a little, ignored some of it, and token exchange interpreted other parts of token exchange specification. Token exchange is a client endpoint so requests must provide authentication information for the calling client. Public clients specify their client identifier as a form parameter. Confidential clients can also use form parameters to pass their client id and secret, Basic Auth, or however your admin has configured the client authentication flow in your realm.
This parameter is required for clients using form parameters for authentication. If you are using Basic Auth, a client JWT token, or client cert authentication, then do not specify this parameter.
This parameter is required for clients using form parameters for authentication and using a client secret as a credential. Do not specify this parameter if client invocations in your realm are authenticated by a different means. The value of the parameter must be urn:ietf:params:oauth:grant-type:token-exchange. A security token that represents the identity of the party on behalf of whom the token exchange is being made.
It is required if you are exchanging an existing token for a new one.
Otherwise it is required to be specified. Valid values are the alias of an Identity Provider configured for your realm.
Exchange the code for tokens | Okta Developer
Or an issuer claim identifier configured by a specific Identity Provider. This parameter represents the type of token the client wants to exchange for. Currently only oauth and OpenID Connect token types are supported. This parameter specifies the target client you want the new token minted for.
This parameter specifies that the client wants a token exchange minted by an external provider. It must be the alias of an Identity Provider configured within the realm. This specifies a username or user id if your client wants to token exchange a different user.
Support for SAML based clients and identity providers may be added in the future depending on user demand. Clients requesting only access token type will only get an access token in the response. Error responses generally fall under the HTTP response code category, but other error status codes may be returned depending on the severity of the error. For example, OAuth Identity Providers may include an additional account-link-url claim if the user does not have a link to an identity provider.
This link can be used for a client initiated link request. You will need to grant clients permission to exchange.
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- OAuth Token exchange API · GitBook
This is discussed more later in token exchange chapter. The rest of this chapter discusses the setup requirements and provides examples for different exchange scenarios. Internal Token to Internal Token Exchange With an internal token to token exchange you have an existing token minted to a specific client and you want to exchange this token for a new one minted for a different target client. Why would you want to do this? This generally happens when a client has a token minted for itself, and needs to make additional requests to other applications that require different claims and permissions within the access token.
Granting Permission for the Exchange Clients that want to exchange tokens for a different client need to be authorized in the admin console to do so.
Introduction A security token is a token exchange of information that facilitates the sharing of identity and security information in heterogeneous environments or across security domains. Security tokens are typically signed to achieve integrity and sometimes also encrypted to achieve confidentiality. Security tokens are also sometimes described as Assertions, such as in [RFC]. A Security Token Service STS is a service capable of validating security tokens provided to it and issuing new security tokens in response, which enables clients to obtain appropriate access credentials for resources in heterogeneous environments or across security domains. The OAuth 2.
Target Client Permission You should see a token-exchange link on the page. Click that to start defining the permission. It will bring you to this page.
Click the Authorization link, go to token exchange Policies tab and create a Client Policy. Client Policy Creation Here you enter in the starting client, that is the authenticated client that is requesting a token exchange.
Apply Client Policy Your client now has permission to invoke. If you do not do this correctly, you will get a Forbidden response if you try to make an exchange. Making the Request When your client is exchanging an existing token for a token targeting another client, you must token exchange the audience parameter. This parameter must be the client identifier for the target client that token exchange configured in the admin console.
OAuth Token exchange API
This external identity provider must be configured within the Identity Provider section of the admin console. So if the account is not linked, you will not be able to get the external token.
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- OAuth Token Exchange
- Token Exchange - Tapkey for Developers
To be able to obtain an external token one of these conditions must be met: The user must have logged in with the external identity provider at least once The user must token exchange linked with the external identity provider through token exchange User Account Service The user account was linked through the external identity provider using Token exchange Initiated Account Linking API.
Finally, the external identity provider must have been configured to store tokens, or, one of the above actions must have been performed with the same user session as the internal token you are exchanging. If the account is not linked, the exchange response will contain a link you can use to establish it.
This is discussed more in the Making the Request section. Granting Permission for the Exchange Internal to external token exchange requests will be denied with aForbidden response until you grant permission for the calling client to exchange tokens with the external identity provider. Identity Provider Permission You should see a token-exchange link on the page.
The parameter must be the alias of a configured identity provider. No token exchange requested token type is supported at this time. The account-link-url claim is provided so token exchange the client can perform Client Initiated Account Linking. Most all? External Token to Internal Token Exchange You can trust and exchange external tokens minted by external identity providers for internal tokens.
This can be used to bridge between token exchange or just to trust tokens from your social provider. Note The current limitation on external token exchanges is that if the external token maps to an existing user an exchange will not be allowed unless the existing user already has an account link to the external identity provider.
You should note that this new user session will remain active until it times out token exchange until you call the logout endpoint of the realm passing this new access token.
These types of changes required a configured identity provider in the admin console. Note SAML identity providers are not supported at this time. Twitter tokens cannot be exchanged either.
Jones Request for Comments: A. Campbell, Ed.
Granting Permission for the Exchange Before external token exchanges can be done, you must grant permission for the calling client to make the exchange. This permission is granted in the same manner as internal token exchange external permission is token exchange. If you also provide an audience parameter whose value points to a different client other than the calling one, you must token exchange grant the calling client permission to exchange to the target client specific in the audience parameter.
How to do this is discussed earlier in this section. If the type is urn:ietf:params:oauth:token-type:jwt, the provider will be matched via the issuer claim within the JWT which token exchange be the alias of the provider, or a registered issuer within the providers configuration. A successful call will mean that the access token is valid. If the subject token is a JWT and if the provider has signature validation enabled, that will be attempted, otherwise, it will default to also invoking on the user info service to validate the token.
Alternatively, you can specify a different target client using the audience parameter.