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flow_refresh.go
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flow_refresh.go
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package oauth2
import (
"net/http"
"time"
"github.com/ory-am/fosite"
"github.com/pkg/errors"
"golang.org/x/net/context"
)
type RefreshTokenGrantHandler struct {
AccessTokenStrategy AccessTokenStrategy
RefreshTokenStrategy RefreshTokenStrategy
// RefreshTokenGrantStorage is used to persist session data across requests.
RefreshTokenGrantStorage RefreshTokenGrantStorage
// AccessTokenLifespan defines the lifetime of an access token.
AccessTokenLifespan time.Duration
}
// HandleTokenEndpointRequest implements https://tools.ietf.org/html/rfc6749#section-6
func (c *RefreshTokenGrantHandler) HandleTokenEndpointRequest(ctx context.Context, req *http.Request, request fosite.AccessRequester) error {
// grant_type REQUIRED.
// Value MUST be set to "refresh_token".
if !request.GetGrantTypes().Exact("refresh_token") {
return errors.Wrap(fosite.ErrUnknownRequest, "")
}
if !request.GetClient().GetGrantTypes().Has("refresh_token") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use grant type refresh_token")
}
refresh := req.PostForm.Get("refresh_token")
signature := c.RefreshTokenStrategy.RefreshTokenSignature(refresh)
accessRequest, err := c.RefreshTokenGrantStorage.GetRefreshTokenSession(ctx, signature, nil)
if errors.Cause(err) == fosite.ErrNotFound {
return errors.Wrap(fosite.ErrInvalidRequest, err.Error())
} else if err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
// The authorization server MUST ... validate the refresh token.
if err := c.RefreshTokenStrategy.ValidateRefreshToken(ctx, request, refresh); err != nil {
return errors.Wrap(fosite.ErrInvalidRequest, err.Error())
}
request.SetRequestedScopes(accessRequest.GetRequestedScopes())
for _, scope := range accessRequest.GetGrantedScopes() {
request.GrantScope(scope)
}
// The authorization server MUST ... and ensure that the refresh token was issued to the authenticated client
if accessRequest.GetClient().GetID() != request.GetClient().GetID() {
return errors.Wrap(fosite.ErrInvalidRequest, "Client ID mismatch")
}
return nil
}
// PopulateTokenEndpointResponse implements https://tools.ietf.org/html/rfc6749#section-6
func (c *RefreshTokenGrantHandler) PopulateTokenEndpointResponse(ctx context.Context, req *http.Request, requester fosite.AccessRequester, responder fosite.AccessResponder) error {
if !requester.GetGrantTypes().Exact("refresh_token") {
return errors.Wrap(fosite.ErrUnknownRequest, "")
}
accessToken, accessSignature, err := c.AccessTokenStrategy.GenerateAccessToken(ctx, requester)
if err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
refreshToken, refreshSignature, err := c.RefreshTokenStrategy.GenerateRefreshToken(ctx, requester)
if err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
signature := c.RefreshTokenStrategy.RefreshTokenSignature(req.PostForm.Get("refresh_token"))
if err := c.RefreshTokenGrantStorage.PersistRefreshTokenGrantSession(ctx, signature, accessSignature, refreshSignature, requester); err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
responder.SetAccessToken(accessToken)
responder.SetTokenType("bearer")
responder.SetExpiresIn(c.AccessTokenLifespan / time.Second)
responder.SetScopes(requester.GetGrantedScopes())
responder.SetExtra("refresh_token", refreshToken)
return nil
}