// It must match the data used during encryption
	// or data key generation.
	AssociatedData Context
}

// MACRequest is a structure containing fields
// and options for generating message authentication
// codes (MAC).
type MACRequest struct {
	// Name is the name of the master key used decrypt
	// the ciphertext.
	Name string

	Version int

	Message []byte
}

（类 `SecurityScopes` 的）`security_scopes` 对象还提供了单字符串类型的属性 `scope_str`，该属性是（要在本例中使用的）用空格分割的作用域。

此处还创建了后续代码中要复用（`raise`）的 `HTTPException` 。

该异常包含了作用域所需的（如有），以空格分割的字符串（使用 `scope_str`）。该字符串要放到包含作用域的 `WWW-Authenticate` 请求头中（这也是规范的要求）。

{* ../../docs_src/security/tutorial005.py hl[105,107:115] *}

## 校验 `username` 与数据形状

我们可以校验是否获取了 `username`，并抽取作用域。

В этом исключении мы включаем требуемые scopes (если есть) в виде строки, разделённой пробелами (используя `scope_str`). Эту строку со scopes мы помещаем в HTTP‑заголовок `WWW-Authenticate` (это часть спецификации).

{* ../../docs_src/security/tutorial005_an_py310.py hl[106,108:116] *}

## Проверка `username` и формата данных { #verify-the-username-and-data-shape }

 * <li>Ensure keys are securely generated and stored</li>
 * <li>For production systems with stringent security requirements, consider using authenticated encryption modes</li>
 * </ul>
 * <p>
 * <strong>Usage Example:</strong>
 * </p>
 * <pre>
 * CachedCipher cipher = new CachedCipher();
 * cipher.setKey("mySecretKey");
 *
 * // Encrypt text

        verify(mockDelegate).getTransactionBufferSize();
        verify(mockDelegate).getBufferCacheSize();
        verify(mockDelegate).getNotifyBufferSize();
    }

    @Test
    @DisplayName("Authentication configuration should delegate correctly")
    void testAuthenticationConfigurationDelegation() {
        // Given
        when(mockDelegate.getLanManCompatibility()).thenReturn(3);

    /**
     * Creates a default CIFSContext for multi-channel operations.
     * In a production implementation, this should be replaced with proper context sharing
     * from the main session to ensure consistent authentication and configuration.
     */
    private jcifs.CIFSContext createDefaultContext() throws CIFSException {
        try {
            // Use the configuration from the MultiChannelManager

			return
		}

		cred := auth.Credentials{
			AccessKey: claims.AccessKey,
			Claims:    claims.Map(),
			Groups:    groups,
		}

		// For authenticated users apply IAM policy.
		if !globalIAMSys.IsAllowed(policy.Args{
			AccountName:     cred.AccessKey,
			Groups:          cred.Groups,
			Action:          policy.PrometheusAdminAction,

                log.trace("doConnect: " + addr);
            }
            t.treeConnect(null, null);
            return t.acquire();
        } catch (final SmbAuthException sae) {
            log.debug("Authentication failed", sae);
            return retryAuthentication(loc, share, trans, t, referral, sae);
        }
    }

    bytesIn.writeByte(0x7d) // == Literal indexed ==
    // Indexed name (idx = 60) -> "www-authenticate"
    bytesIn.writeByte(0x05) // Literal value (len = 5)
    bytesIn.writeUtf8("Basic")
    hpackReader!!.readHeaders()
    assertThat(hpackReader!!.getAndResetHeaderList())
      .containsExactly(Header("www-authenticate", "Basic"))
  }

  @Test
  fun readLiteralHeaderWithIncrementalIndexingDynamicName() {

//   notify:
//     endpoint: "https://notify.endpoint" # notification endpoint to receive job status events
//     token: "Bearer xxxxx" # optional authentication token for the notification endpoint

//   retry:
//     attempts: 10 # number of retries for the job before giving up
//     delay: "500ms" # least amount of delay between each retry