func (s *DefaultConsentStrategy) IssueChallenge(authorizeRequest fosite.AuthorizeRequester, redirectURL string) (string, error) {
token := jwt.New(jwt.SigningMethodRS256)
token.Claims = map[string]interface{}{
"jti": uuid.New(),
"scp": authorizeRequest.GetScopes(),
"aud": authorizeRequest.GetClient().GetID(),
"exp": time.Now().Add(time.Hour).Unix(),
"redir": redirectURL,
}
ks, err := s.KeyManager.GetKey(ConsentChallengeKey, "private")
if err != nil {
return "", errors.New(err)
}
rsaKey, ok := jwk.First(ks.Keys).Key.(*rsa.PrivateKey)
if !ok {
return "", errors.New("Could not convert to RSA Private Key")
}
var signature, encoded string
if encoded, err = token.SigningString(); err != nil {
return "", errors.New(err)
} else if signature, err = token.Method.Sign(encoded, rsaKey); err != nil {
return "", errors.New(err)
}
return fmt.Sprintf("%s.%s", encoded, signature), nil
}
func (s *DefaultConsentStrategy) ValidateResponse(a fosite.AuthorizeRequester, token string) (claims *Session, err error) {
t, err := jwt.Parse(token, func(t *jwt.Token) (interface{}, error) {
if _, ok := t.Method.(*jwt.SigningMethodRSA); !ok {
return nil, errors.Errorf("Unexpected signing method: %v", t.Header["alg"])
}
pk, err := s.KeyManager.GetKey(ConsentEndpointKey, "public")
if err != nil {
return nil, err
}
rsaKey, ok := jwk.First(pk.Keys).Key.(*rsa.PublicKey)
if !ok {
return nil, errors.New("Could not convert to RSA Private Key")
}
return rsaKey, nil
})
if err != nil {
return nil, errors.Errorf("Couldn't parse token: %v", err)
} else if !t.Valid {
return nil, errors.Errorf("Token is invalid")
}
if time.Now().After(ejwt.ToTime(t.Claims["exp"])) {
return nil, errors.Errorf("Token expired")
}
if ejwt.ToString(t.Claims["aud"]) != a.GetClient().GetID() {
return nil, errors.Errorf("Audience mismatch")
}
subject := ejwt.ToString(t.Claims["sub"])
for _, scope := range toStringSlice(t.Claims["scp"]) {
a.GrantScope(scope)
}
return &Session{
Subject: subject,
DefaultSession: &strategy.DefaultSession{
Claims: &ejwt.IDTokenClaims{
Audience: a.GetClient().GetID(),
Subject: subject,
Issuer: s.Issuer,
IssuedAt: time.Now(),
ExpiresAt: time.Now(),
Extra: t.Claims,
},
Headers: &ejwt.Headers{},
},
}, err
}
func (c *OpenIDConnectImplicitHandler) HandleAuthorizeEndpointRequest(ctx context.Context, req *http.Request, ar fosite.AuthorizeRequester, resp fosite.AuthorizeResponder) error {
if !(ar.GetGrantedScopes().Has("openid") && (ar.GetResponseTypes().Has("token", "id_token") || ar.GetResponseTypes().Exact("id_token"))) {
return nil
} else if ar.GetResponseTypes().Has("code") {
// hybrid flow
return nil
}
if !ar.GetClient().GetGrantTypes().Has("implicit") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use implicit grant type")
}
if ar.GetResponseTypes().Exact("id_token") && !ar.GetClient().GetResponseTypes().Has("id_token") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use response type id_token")
} else if ar.GetResponseTypes().Matches("token", "id_token") && !ar.GetClient().GetResponseTypes().Has("token", "id_token") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use response type token and id_token")
}
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))
}
}
sess, ok := ar.GetSession().(Session)
if !ok {
return errors.Wrap(ErrInvalidSession, "")
}
claims := sess.IDTokenClaims()
if ar.GetResponseTypes().Has("token") {
if err := c.AuthorizeImplicitGrantTypeHandler.IssueImplicitAccessToken(ctx, req, ar, resp); err != nil {
return errors.Wrap(err, err.Error())
}
ar.SetResponseTypeHandled("token")
hash, err := c.RS256JWTStrategy.Hash([]byte(resp.GetFragment().Get("access_token")))
if err != nil {
return err
}
claims.AccessTokenHash = []byte(base64.URLEncoding.EncodeToString([]byte(hash[:c.RS256JWTStrategy.GetSigningMethodLength()/2])))
} else {
resp.AddFragment("state", ar.GetState())
}
if err := c.IssueImplicitIDToken(ctx, req, ar, resp); err != nil {
return errors.Wrap(err, err.Error())
}
// 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
ar.SetResponseTypeHandled("id_token")
return nil
}
func (c *OpenIDConnectExplicitHandler) HandleAuthorizeEndpointRequest(ctx context.Context, req *http.Request, ar fosite.AuthorizeRequester, resp fosite.AuthorizeResponder) error {
if !(ar.GetGrantedScopes().Has("openid") && ar.GetResponseTypes().Exact("code")) {
return nil
}
if !ar.GetClient().GetResponseTypes().Has("id_token", "code") {
return errors.Wrap(fosite.ErrInvalidRequest, "The client is not allowed to use response type id_token and code")
}
if len(resp.GetCode()) == 0 {
return errors.Wrap(fosite.ErrMisconfiguration, "Authorization code has not been issued yet")
}
if err := c.OpenIDConnectRequestStorage.CreateOpenIDConnectSession(ctx, resp.GetCode(), ar); err != nil {
return errors.Wrap(fosite.ErrServerError, err.Error())
}
// there is no need to check for https, because it has already been checked by core.explicit
return nil
}
func (c *AuthorizeImplicitGrantTypeHandler) HandleAuthorizeEndpointRequest(ctx context.Context, req *http.Request, 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, req, ar, resp)
}
func (c *AuthorizeExplicitGrantHandler) HandleAuthorizeEndpointRequest(ctx context.Context, req *http.Request, 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("code") {
return nil
}
if !ar.GetClient().GetResponseTypes().Has("code") {
return errors.Wrap(fosite.ErrInvalidGrant, "")
}
if !fosite.IsRedirectURISecure(ar.GetRedirectURI()) {
return errors.Wrap(fosite.ErrInvalidRequest, "")
}
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))
}
}
return c.IssueAuthorizeCode(ctx, req, ar, resp)
}