func (c *AuthorizeExplicitGrantHandler) PopulateTokenEndpointResponse(ctx context.Context, req *http.Request, requester fosite.AccessRequester, responder fosite.AccessResponder) error {
// grant_type REQUIRED.
// Value MUST be set to "authorization_code".
if !requester.GetGrantTypes().Exact("authorization_code") {
return errors.Wrap(fosite.ErrUnknownRequest, "")
}
code := req.PostForm.Get("code")
signature := c.AuthorizeCodeStrategy.AuthorizeCodeSignature(code)
authorizeRequest, err := c.AuthorizeCodeGrantStorage.GetAuthorizeCodeSession(ctx, signature, requester.GetSession())
if err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
} else if err := c.AuthorizeCodeStrategy.ValidateAuthorizeCode(ctx, requester, code); err != nil {
return errors.Wrap(fosite.ErrInvalidRequest, err.Error())
}
access, accessSignature, err := c.AccessTokenStrategy.GenerateAccessToken(ctx, requester)
if err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
for _, scope := range authorizeRequest.GetGrantedScopes() {
requester.GrantScope(scope)
}
var refresh, refreshSignature string
if authorizeRequest.GetGrantedScopes().Has("offline") {
refresh, refreshSignature, err = c.RefreshTokenStrategy.GenerateRefreshToken(ctx, requester)
if err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
}
if err := c.AuthorizeCodeGrantStorage.PersistAuthorizeCodeGrantSession(ctx, signature, accessSignature, refreshSignature, requester); err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
responder.SetAccessToken(access)
responder.SetTokenType("bearer")
responder.SetExpiresIn(getExpiresIn(requester, fosite.AccessToken, c.AccessTokenLifespan, time.Now()))
responder.SetScopes(requester.GetGrantedScopes())
if refresh != "" {
responder.SetExtra("refresh_token", refresh)
}
return nil
}
// 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)
originalRequest, err := c.RefreshTokenGrantStorage.GetRefreshTokenSession(ctx, signature, request.GetSession())
if errors.Cause(err) == fosite.ErrNotFound {
return errors.Wrap(fosite.ErrInvalidRequest, err.Error())
} else if err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
if !originalRequest.GetGrantedScopes().Has("offline") {
return errors.Wrap(fosite.ErrScopeNotGranted, "The client is not allowed to use grant type refresh_token")
}
// 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())
}
// The authorization server MUST ... and ensure that the refresh token was issued to the authenticated client
if originalRequest.GetClient().GetID() != request.GetClient().GetID() {
return errors.Wrap(fosite.ErrInvalidRequest, "Client ID mismatch")
}
request.SetSession(originalRequest.GetSession())
request.SetRequestedScopes(originalRequest.GetRequestedScopes())
for _, scope := range originalRequest.GetGrantedScopes() {
request.GrantScope(scope)
}
request.GetSession().SetExpiresAt(fosite.AccessToken, time.Now().Add(c.AccessTokenLifespan))
return nil
}