/**
     * The key for user roles in the request attribute.
     */
    protected static final String USER_ROLES = "userRoles";

    /**
     * The cached cipher for encryption and decryption.
     */
    protected CachedCipher cipher;

    /**
     * The separator for values in the role string.
     */
    protected String valueSeparator = "\n";

    /**

     * Decrypt a message using the session's encryption context
     *
     * @param encryptedMessage the encrypted message with transform header
     * @return decrypted message
     * @throws CIFSException if decryption fails or encryption is not enabled
     */
    public byte[] decryptMessage(byte[] encryptedMessage) throws CIFSException {
        if (this.encryptionContext == null) {

        } else {
            throw new SmbUnsupportedOperationException("SMB3 required for encryption, negotiated: " + dialect);
        }

        try {
            // Derive encryption and decryption keys using SMB3 KDF
            final int dialectInt = dialect.getDialect();
            final byte[] encryptionKey = Smb3KeyDerivation.deriveEncryptionKey(dialectInt, sessionKey, preauthHash);

## Changelog since v1.32.3

## Changes by Kind

### Bug or Regression

- Fix a bug where kube-apiserver could emit an further watch even even if decryption failed for earlier event and it was not emitted. ([#131159](https://github.com/kubernetes/kubernetes/pull/131159), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery and Etcd]

- kubeadm now includes the ability to specify certificate encryption and decryption keys for the upload and download certificate phases as part of the new v1beta2 kubeadm config format. ([#77012](https://github.com/kubernetes/kubernetes/pull/77012), [@rosti](https://github.com/rosti))

- Fix a bug where kube-apiserver could emit an further watch even even if decryption failed for earlier event and it was not emitted. ([#131020](https://github.com/kubernetes/kubernetes/pull/131020), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery and Etcd]

## Changelog since v1.30.11

## Changes by Kind

### Bug or Regression

- Fix a bug where kube-apiserver could emit an further watch even even if decryption failed for earlier event and it was not emitted. ([#131161](https://github.com/kubernetes/kubernetes/pull/131161), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery]

## Changelog since v1.31.7

## Changes by Kind

### Bug or Regression

- Fix a bug where kube-apiserver could emit an further watch even even if decryption failed for earlier event and it was not emitted. ([#131160](https://github.com/kubernetes/kubernetes/pull/131160), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery and Etcd]