if ((mechanismListMIC == null || !this.mechContext.supportsIntegrity()) && this.requireMic
                && !this.mechContext.isPreferredMech(this.selectedMech)) {
            throw new CIFSException("SPNEGO integrity is required but not available");
        }

        // otherwise we ignore the absence of a MIC
        if (!this.mechContext.isMICAvailable() || mechanismListMIC == null) {
            return;