forked from ory/fosite
/
flow_authorize_implicit.go
77 lines (59 loc) · 2.64 KB
/
flow_authorize_implicit.go
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package oauth2
import (
"strings"
"time"
"fmt"
"context"
"strconv"
"github.com/ory/fosite"
"github.com/pkg/errors"
)
// AuthorizeImplicitGrantTypeHandler is a response handler for the Authorize Code grant using the implicit grant type
// as defined in https://tools.ietf.org/html/rfc6749#section-4.2
type AuthorizeImplicitGrantTypeHandler struct {
AccessTokenStrategy AccessTokenStrategy
// AccessTokenStorage is used to persist session data across requests.
AccessTokenStorage AccessTokenStorage
// AccessTokenLifespan defines the lifetime of an access token.
AccessTokenLifespan time.Duration
ScopeStrategy fosite.ScopeStrategy
}
func (c *AuthorizeImplicitGrantTypeHandler) HandleAuthorizeEndpointRequest(ctx context.Context, ar fosite.AuthorizeRequester, resp fosite.AuthorizeResponder) error {
// This let's us define multiple response types, for example open id connect's id_token
if !ar.GetResponseTypes().Exact("token") {
return nil
}
if !ar.GetClient().GetResponseTypes().Has("token") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use response type token")
}
if !ar.GetClient().GetGrantTypes().Has("implicit") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use grant type implicit")
}
client := ar.GetClient()
for _, scope := range ar.GetRequestedScopes() {
if !c.ScopeStrategy(client.GetScopes(), scope) {
return errors.Wrap(fosite.ErrInvalidScope, fmt.Sprintf("The client is not allowed to request scope %s", scope))
}
}
// there is no need to check for https, because implicit flow does not require https
// https://tools.ietf.org/html/rfc6819#section-4.4.2
return c.IssueImplicitAccessToken(ctx, ar, resp)
}
func (c *AuthorizeImplicitGrantTypeHandler) IssueImplicitAccessToken(ctx context.Context, ar fosite.AuthorizeRequester, resp fosite.AuthorizeResponder) error {
// Generate the code
token, signature, err := c.AccessTokenStrategy.GenerateAccessToken(ctx, ar)
if err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
ar.GetSession().SetExpiresAt(fosite.AccessToken, time.Now().Add(c.AccessTokenLifespan))
if err := c.AccessTokenStorage.CreateAccessTokenSession(ctx, signature, ar); err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
resp.AddFragment("access_token", token)
resp.AddFragment("expires_in", strconv.FormatInt(int64(getExpiresIn(ar, fosite.AccessToken, c.AccessTokenLifespan, time.Now())/time.Second), 10))
resp.AddFragment("token_type", "bearer")
resp.AddFragment("state", ar.GetState())
resp.AddFragment("scope", strings.Join(ar.GetGrantedScopes(), " "))
ar.SetResponseTypeHandled("token")
return nil
}