* <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);

У цьому винятку ми включаємо потрібні scopes (якщо є) як строку, розділену пробілами (використовуючи `scope_str`). Ми поміщаємо цю строку зі scopes в заголовок `WWW-Authenticate` (це частина специфікації).

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

## Перевірте `username` і структуру даних { #verify-the-username-and-data-shape }

    * 數字 (`int`, `float`) 與其最大值和最小值等。

* 驗證外來的型別，比如:
    * URL
    * Email
    * UUID
    * ...等等。

所有的驗證都由完善且強大的 **Pydantic** 處理。

### 安全性及身份驗證 { #security-and-authentication }

FastAPI 已經整合了安全性和身份驗證的功能，但不會強制與特定的資料庫或資料模型進行綁定。

OpenAPI 中定義的安全模式，包括：

* HTTP 基本認證。
* **OAuth2**（也使用 **JWT tokens**）。在 [OAuth2 with JWT](tutorial/security/oauth2-jwt.md) 查看教學。
* API 密鑰，在：

    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

- Graduated configurable endpoints for anonymous authentication using the authentication configuration file to stable. ([#131654](https://github.com/kubernetes/kubernetes/pull/131654), [@vinayakankugoyal](https://github.com/vinayakankugoyal)) [SIG API Machinery and Testing]

            }

            @Override
            public boolean isRequestedSessionIdFromURL() {
                return false;
            }

            @Override
            public boolean authenticate(HttpServletResponse response) throws IOException, ServletException {
                return false;
            }

            @Override

developing Gradle. By default, the build is [configured](https://github.com/gradle/gradle-org-conventions-plugin#what-it-does) to use the build cache node in the EU region.

The build cache has anonymous read access, so you don't need to authenticate in order to use it. You can use a different build cache node by specifying `-Ddevelocity.edge.discovery=false -DcacheNode=us` for a build cache node in the US or `-Ddevelocity.edge.discovery=false -DcacheNode=au` for a build cache node in Australia....

	}

	// Lookup user DN
	lookupResult, err := l.LDAP.LookupUsername(conn, username)
	if err != nil {
		errRet := fmt.Errorf("Unable to find user DN: %w", err)
		return nil, nil, errRet
	}

	// Authenticate the user credentials.
	err = conn.Bind(lookupResult.ActualDN, password)
	if err != nil {
		errRet := fmt.Errorf("LDAP auth failed for DN %s: %w", lookupResult.ActualDN, err)
		return nil, nil, errRet
	}