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flow_client_credentials.go
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/
flow_client_credentials.go
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package oauth2
import (
"fmt"
"context"
"time"
"github.com/ory/fosite"
"github.com/pkg/errors"
)
type ClientCredentialsGrantHandler struct {
*HandleHelper
ScopeStrategy fosite.ScopeStrategy
}
// IntrospectTokenEndpointRequest implements https://tools.ietf.org/html/rfc6749#section-4.4.2
func (c *ClientCredentialsGrantHandler) HandleTokenEndpointRequest(_ context.Context, request fosite.AccessRequester) error {
// grant_type REQUIRED.
// Value MUST be set to "client_credentials".
if !request.GetGrantTypes().Exact("client_credentials") {
return errors.WithStack(fosite.ErrUnknownRequest)
}
client := request.GetClient()
for _, scope := range request.GetRequestedScopes() {
if !c.ScopeStrategy(client.GetScopes(), scope) {
return errors.Wrap(fosite.ErrInvalidScope, fmt.Sprintf("The client is not allowed to request scope %s", scope))
}
}
// The client MUST authenticate with the authorization server as described in Section 3.2.1.
// This requirement is already fulfilled because fosite requries all token requests to be authenticated as described
// in https://tools.ietf.org/html/rfc6749#section-3.2.1
if client.IsPublic() {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is public and thus not allowed to use grant type client_credentials")
}
// if the client is not public, he has already been authenticated by the access request handler.
request.GetSession().SetExpiresAt(fosite.AccessToken, time.Now().Add(c.AccessTokenLifespan))
return nil
}
// PopulateTokenEndpointResponse implements https://tools.ietf.org/html/rfc6749#section-4.4.3
func (c *ClientCredentialsGrantHandler) PopulateTokenEndpointResponse(ctx context.Context, request fosite.AccessRequester, response fosite.AccessResponder) error {
if !request.GetGrantTypes().Exact("client_credentials") {
return errors.WithStack(fosite.ErrUnknownRequest)
}
if !request.GetClient().GetGrantTypes().Has("client_credentials") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use grant type client_credentials")
}
return c.IssueAccessToken(ctx, request, response)
}