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24b05dc88c
* fix(authz): add logging to access token verification errors Related to #6949 * use logging fields --------- Co-authored-by: Livio Spring <livio.a@gmail.com>
340 lines
13 KiB
Go
340 lines
13 KiB
Go
package eventstore
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import (
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"context"
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"encoding/base64"
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"fmt"
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"strings"
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"time"
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"github.com/go-jose/go-jose/v3"
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"github.com/zitadel/logging"
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"github.com/zitadel/oidc/v3/pkg/oidc"
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"github.com/zitadel/oidc/v3/pkg/op"
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"github.com/zitadel/zitadel/internal/api/authz"
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http_util "github.com/zitadel/zitadel/internal/api/http"
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"github.com/zitadel/zitadel/internal/authz/repository/eventsourcing/view"
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"github.com/zitadel/zitadel/internal/command"
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"github.com/zitadel/zitadel/internal/crypto"
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"github.com/zitadel/zitadel/internal/domain"
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caos_errs "github.com/zitadel/zitadel/internal/errors"
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"github.com/zitadel/zitadel/internal/eventstore"
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"github.com/zitadel/zitadel/internal/query"
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"github.com/zitadel/zitadel/internal/telemetry/tracing"
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usr_model "github.com/zitadel/zitadel/internal/user/model"
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usr_view "github.com/zitadel/zitadel/internal/user/repository/view"
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"github.com/zitadel/zitadel/internal/user/repository/view/model"
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)
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type TokenVerifierRepo struct {
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TokenVerificationKey crypto.EncryptionAlgorithm
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Eventstore *eventstore.Eventstore
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View *view.View
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Query *query.Queries
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ExternalSecure bool
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}
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func (repo *TokenVerifierRepo) Health() error {
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return repo.View.Health()
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}
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func (repo *TokenVerifierRepo) tokenByID(ctx context.Context, tokenID, userID string) (_ *usr_model.TokenView, err error) {
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ctx, span := tracing.NewSpan(ctx)
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defer func() { span.EndWithError(err) }()
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instanceID := authz.GetInstance(ctx).InstanceID()
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// always load the latest sequence first, so in case the token was not found by id,
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// the sequence will be equal or lower than the actual projection and no events are lost
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sequence, err := repo.View.GetLatestState(ctx)
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logging.WithFields("instanceID", instanceID, "userID", userID, "tokenID", tokenID).
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OnError(err).
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Errorf("could not get current sequence for token check")
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token, viewErr := repo.View.TokenByIDs(tokenID, userID, instanceID)
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if viewErr != nil && !caos_errs.IsNotFound(viewErr) {
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return nil, viewErr
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}
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if caos_errs.IsNotFound(viewErr) {
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token = new(model.TokenView)
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token.ID = tokenID
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token.UserID = userID
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if sequence != nil {
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token.Sequence = sequence.Sequence
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}
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}
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events, esErr := repo.getUserEvents(ctx, userID, instanceID, token.Sequence, token.GetRelevantEventTypes())
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if caos_errs.IsNotFound(viewErr) && len(events) == 0 {
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return nil, caos_errs.ThrowNotFound(nil, "EVENT-4T90g", "Errors.Token.NotFound")
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}
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if esErr != nil {
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logging.WithError(viewErr).WithField("traceID", tracing.TraceIDFromCtx(ctx)).Debug("error retrieving new events")
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return model.TokenViewToModel(token), nil
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}
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viewToken := *token
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for _, event := range events {
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err := token.AppendEventIfMyToken(event)
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if err != nil {
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return model.TokenViewToModel(&viewToken), nil
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}
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}
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if !token.Expiration.After(time.Now().UTC()) || token.Deactivated {
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return nil, caos_errs.ThrowNotFound(nil, "EVENT-5Bm9s", "Errors.Token.NotFound")
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}
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return model.TokenViewToModel(token), nil
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}
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func (repo *TokenVerifierRepo) VerifyAccessToken(ctx context.Context, tokenString, verifierClientID, projectID string) (userID string, agentID string, clientID, prefLang, resourceOwner string, err error) {
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ctx, span := tracing.NewSpan(ctx)
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defer func() { span.EndWithError(err) }()
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tokenID, subject, ok := repo.getTokenIDAndSubject(ctx, tokenString)
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if !ok {
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return "", "", "", "", "", caos_errs.ThrowUnauthenticated(nil, "APP-Reb32", "invalid token")
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}
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if strings.HasPrefix(tokenID, command.IDPrefixV2) {
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userID, clientID, resourceOwner, err = repo.verifyAccessTokenV2(ctx, tokenID, verifierClientID, projectID)
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return
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}
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if sessionID, ok := strings.CutPrefix(tokenID, authz.SessionTokenPrefix); ok {
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userID, clientID, resourceOwner, err = repo.verifySessionToken(ctx, sessionID, tokenString)
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return
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}
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return repo.verifyAccessTokenV1(ctx, tokenID, subject, verifierClientID, projectID)
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}
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func (repo *TokenVerifierRepo) verifyAccessTokenV1(ctx context.Context, tokenID, subject, verifierClientID, projectID string) (userID string, agentID string, clientID, prefLang, resourceOwner string, err error) {
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ctx, span := tracing.NewSpan(ctx)
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defer func() { span.EndWithError(err) }()
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_, tokenSpan := tracing.NewNamedSpan(ctx, "token")
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token, err := repo.tokenByID(ctx, tokenID, subject)
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tokenSpan.EndWithError(err)
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if err != nil {
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return "", "", "", "", "", caos_errs.ThrowUnauthenticated(err, "APP-BxUSiL", "invalid token")
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}
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if !token.Expiration.After(time.Now().UTC()) {
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return "", "", "", "", "", caos_errs.ThrowUnauthenticated(err, "APP-k9KS0", "invalid token")
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}
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if token.IsPAT {
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return token.UserID, "", "", "", token.ResourceOwner, nil
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}
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if err = verifyAudience(token.Audience, verifierClientID, projectID); err != nil {
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return "", "", "", "", "", err
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}
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return token.UserID, token.UserAgentID, token.ApplicationID, token.PreferredLanguage, token.ResourceOwner, nil
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}
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func (repo *TokenVerifierRepo) verifyAccessTokenV2(ctx context.Context, token, verifierClientID, projectID string) (userID, clientID, resourceOwner string, err error) {
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ctx, span := tracing.NewSpan(ctx)
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defer func() { span.EndWithError(err) }()
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activeToken, err := repo.Query.ActiveAccessTokenByToken(ctx, token)
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if err != nil {
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return "", "", "", err
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}
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if err = verifyAudience(activeToken.Audience, verifierClientID, projectID); err != nil {
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return "", "", "", err
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}
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if err = repo.checkAuthentication(ctx, activeToken.AuthMethods, activeToken.UserID); err != nil {
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return "", "", "", err
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}
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return activeToken.UserID, activeToken.ClientID, activeToken.ResourceOwner, nil
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}
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func (repo *TokenVerifierRepo) verifySessionToken(ctx context.Context, sessionID, token string) (userID, clientID, resourceOwner string, err error) {
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ctx, span := tracing.NewSpan(ctx)
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defer func() { span.EndWithError(err) }()
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session, err := repo.Query.SessionByID(ctx, true, sessionID, token)
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if err != nil {
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return "", "", "", err
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}
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if !session.Expiration.IsZero() && session.Expiration.Before(time.Now()) {
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return "", "", "", caos_errs.ThrowPermissionDenied(nil, "AUTHZ-EGDo3", "session expired")
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}
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if err = repo.checkAuthentication(ctx, authMethodsFromSession(session), session.UserFactor.UserID); err != nil {
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return "", "", "", err
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}
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return session.UserFactor.UserID, "", session.UserFactor.ResourceOwner, nil
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}
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// checkAuthentication ensures the session or token was authenticated (at least a single [domain.UserAuthMethodType]).
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// It will also check if there was a multi factor authentication, if either MFA is forced by the login policy or if the user has set up any
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func (repo *TokenVerifierRepo) checkAuthentication(ctx context.Context, authMethods []domain.UserAuthMethodType, userID string) error {
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if len(authMethods) == 0 {
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return caos_errs.ThrowPermissionDenied(nil, "AUTHZ-Kl3p0", "authentication required")
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}
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if domain.HasMFA(authMethods) {
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return nil
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}
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availableAuthMethods, forceMFA, forceMFALocalOnly, err := repo.Query.ListUserAuthMethodTypesRequired(setCallerCtx(ctx, userID), userID)
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if err != nil {
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return err
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}
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if domain.RequiresMFA(forceMFA, forceMFALocalOnly, hasIDPAuthentication(authMethods)) || domain.HasMFA(availableAuthMethods) {
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return caos_errs.ThrowPermissionDenied(nil, "AUTHZ-Kl3p0", "mfa required")
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}
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return nil
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}
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func hasIDPAuthentication(authMethods []domain.UserAuthMethodType) bool {
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for _, method := range authMethods {
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if method == domain.UserAuthMethodTypeIDP {
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return true
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}
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}
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return false
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}
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func authMethodsFromSession(session *query.Session) []domain.UserAuthMethodType {
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types := make([]domain.UserAuthMethodType, 0, domain.UserAuthMethodTypeIDP)
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if !session.PasswordFactor.PasswordCheckedAt.IsZero() {
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types = append(types, domain.UserAuthMethodTypePassword)
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}
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if !session.WebAuthNFactor.WebAuthNCheckedAt.IsZero() {
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if session.WebAuthNFactor.UserVerified {
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types = append(types, domain.UserAuthMethodTypePasswordless)
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} else {
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types = append(types, domain.UserAuthMethodTypeU2F)
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}
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}
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if !session.IntentFactor.IntentCheckedAt.IsZero() {
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types = append(types, domain.UserAuthMethodTypeIDP)
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}
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if !session.TOTPFactor.TOTPCheckedAt.IsZero() {
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types = append(types, domain.UserAuthMethodTypeTOTP)
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}
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if !session.OTPSMSFactor.OTPCheckedAt.IsZero() {
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types = append(types, domain.UserAuthMethodTypeOTPSMS)
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}
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if !session.OTPEmailFactor.OTPCheckedAt.IsZero() {
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types = append(types, domain.UserAuthMethodTypeOTPEmail)
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}
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return types
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}
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func setCallerCtx(ctx context.Context, userID string) context.Context {
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ctxData := authz.GetCtxData(ctx)
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ctxData.UserID = userID
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return authz.SetCtxData(ctx, ctxData)
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}
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func (repo *TokenVerifierRepo) ProjectIDAndOriginsByClientID(ctx context.Context, clientID string) (projectID string, origins []string, err error) {
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app, err := repo.View.ApplicationByOIDCClientID(ctx, clientID)
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if err != nil {
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return "", nil, err
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}
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return app.ProjectID, app.OIDCConfig.AllowedOrigins, nil
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}
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func (repo *TokenVerifierRepo) VerifierClientID(ctx context.Context, appName string) (clientID, projectID string, err error) {
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ctx, span := tracing.NewSpan(ctx)
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defer func() { span.EndWithError(err) }()
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app, err := repo.View.ApplicationByProjecIDAndAppName(ctx, authz.GetInstance(ctx).ProjectID(), appName)
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if err != nil {
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return "", "", err
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}
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if app.OIDCConfig != nil {
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clientID = app.OIDCConfig.ClientID
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} else if app.APIConfig != nil {
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clientID = app.APIConfig.ClientID
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}
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return clientID, app.ProjectID, nil
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}
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func (repo *TokenVerifierRepo) getUserEvents(ctx context.Context, userID, instanceID string, sequence uint64, eventTypes []eventstore.EventType) (_ []eventstore.Event, err error) {
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ctx, span := tracing.NewSpan(ctx)
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defer func() { span.EndWithError(err) }()
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query, err := usr_view.UserByIDQuery(userID, instanceID, sequence, eventTypes)
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if err != nil {
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return nil, err
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}
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return repo.Eventstore.Filter(ctx, query)
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}
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// getTokenIDAndSubject returns the TokenID and Subject of both opaque tokens and JWTs
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func (repo *TokenVerifierRepo) getTokenIDAndSubject(ctx context.Context, accessToken string) (tokenID string, subject string, valid bool) {
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// accessToken can be either opaque or JWT
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// let's try opaque first:
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tokenIDSubject, err := repo.decryptAccessToken(accessToken)
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if err != nil {
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logging.WithError(err).Warn("token verifier repo: decrypt access token")
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// if decryption did not work, it might be a JWT
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accessTokenClaims, err := op.VerifyAccessToken[*oidc.AccessTokenClaims](ctx, accessToken, repo.jwtTokenVerifier(ctx))
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if err != nil {
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logging.WithError(err).Warn("token verifier repo: verify JWT access token")
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return "", "", false
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}
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return accessTokenClaims.JWTID, accessTokenClaims.Subject, true
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}
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splitToken := strings.Split(tokenIDSubject, ":")
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if len(splitToken) != 2 {
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return "", "", false
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}
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return splitToken[0], splitToken[1], true
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}
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func (repo *TokenVerifierRepo) jwtTokenVerifier(ctx context.Context) *op.AccessTokenVerifier {
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keySet := &openIDKeySet{repo.Query}
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issuer := http_util.BuildOrigin(authz.GetInstance(ctx).RequestedHost(), repo.ExternalSecure)
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return op.NewAccessTokenVerifier(issuer, keySet)
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}
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func (repo *TokenVerifierRepo) decryptAccessToken(token string) (string, error) {
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tokenData, err := base64.RawURLEncoding.DecodeString(token)
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if err != nil {
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return "", caos_errs.ThrowUnauthenticated(nil, "APP-ASdgg", "invalid token")
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}
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tokenIDSubject, err := repo.TokenVerificationKey.DecryptString(tokenData, repo.TokenVerificationKey.EncryptionKeyID())
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if err != nil {
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return "", caos_errs.ThrowUnauthenticated(nil, "APP-8EF0zZ", "invalid token")
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}
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return tokenIDSubject, nil
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}
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func verifyAudience(audience []string, verifierClientID, projectID string) error {
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for _, aud := range audience {
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if verifierClientID == aud || projectID == aud {
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return nil
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}
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}
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return caos_errs.ThrowUnauthenticated(nil, "APP-Zxfako", "invalid audience")
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}
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type openIDKeySet struct {
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*query.Queries
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}
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// VerifySignature implements the oidc.KeySet interface
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// providing an implementation for the keys retrieved directly from Queries
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func (o *openIDKeySet) VerifySignature(ctx context.Context, jws *jose.JSONWebSignature) ([]byte, error) {
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keySet, err := o.Queries.ActivePublicKeys(ctx, time.Now())
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if err != nil {
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return nil, fmt.Errorf("error fetching keys: %w", err)
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}
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keyID, alg := oidc.GetKeyIDAndAlg(jws)
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key, err := oidc.FindMatchingKey(keyID, oidc.KeyUseSignature, alg, jsonWebKeys(keySet.Keys)...)
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if err != nil {
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return nil, fmt.Errorf("invalid signature: %w", err)
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}
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return jws.Verify(&key)
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}
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func jsonWebKeys(keys []query.PublicKey) []jose.JSONWebKey {
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webKeys := make([]jose.JSONWebKey, len(keys))
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for i, key := range keys {
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webKeys[i] = jose.JSONWebKey{
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KeyID: key.ID(),
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Algorithm: key.Algorithm(),
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Use: key.Use().String(),
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Key: key.Key(),
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}
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}
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return webKeys
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}
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