private static final int BYTE_MASK = (1 << Byte.SIZE) - 1; // 2^8 - 1 = 255
  private static final int SHORT_MASK = (1 << Short.SIZE) - 1; // 2^16 - 1 = 65_535

  @SuppressWarnings("unchecked")
  static final ImmutableMap<Object, Object> EMPTY =
      new RegularImmutableMap<>(null, new Object[0], 0);

  /*

Der `scopes`-Parameter erhält ein `dict` mit jedem Scope als Schlüssel und dessen Beschreibung als Wert:

=== "Python 3.10+"

    ```Python hl_lines="62-65"
    {!> ../../../docs_src/security/tutorial005_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="62-65"
    {!> ../../../docs_src/security/tutorial005_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="63-66"

		ETag:   ETag{144, 64, 44, 120, 210, 220, 205, 222, 225, 233, 232, 98, 34, 206, 44, 99, 97, 103, 95, 53, 41, 210, 96, 0, 174, 46, 144, 15, 242, 22, 179, 203, 89, 225, 48, 224, 146, 216, 162, 152, 30, 119, 111, 77, 11, 214, 9, 65},
	},

	{String: `"3b83ef96387f14655fc854ddc3c6bd57`, ShouldFail: true},                                                                  // 6

        int start = bufferIndex;

        int structureSize = SMBUtil.readInt2(buffer, bufferIndex);
        if ( structureSize != 65 ) {
            throw new SMBProtocolDecodingException("Structure size is not 65");
        }

        this.securityMode = SMBUtil.readInt2(buffer, bufferIndex + 2);
        bufferIndex += 4;

The `scopes` parameter receives a `dict` with each scope as a key and the description as the value:

=== "Python 3.10+"

    ```Python hl_lines="62-65"
    {!> ../../../docs_src/security/tutorial005_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="62-65"
    {!> ../../../docs_src/security/tutorial005_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="63-66"

    bigValues.add(BigInteger.valueOf(Long.MAX_VALUE).add(ONE));
    // Now add values near 2^N for lots of values of N.
    for (int exponent :
        asList(
            64,
            65,
            71,
            72,
            73,
            79,
            80,
            81,
            255,
            256,
            257,
            511,
            512,

pkg debug/elf, const R_ARM_LDC_SB_G2 = 83
pkg debug/elf, const R_ARM_LDC_SB_G2 R_ARM
pkg debug/elf, const R_ARM_LDRS_PC_G0 = 64
pkg debug/elf, const R_ARM_LDRS_PC_G0 R_ARM
pkg debug/elf, const R_ARM_LDRS_PC_G1 = 65
pkg debug/elf, const R_ARM_LDRS_PC_G1 R_ARM
pkg debug/elf, const R_ARM_LDRS_PC_G2 = 66
pkg debug/elf, const R_ARM_LDRS_PC_G2 R_ARM
pkg debug/elf, const R_ARM_LDRS_SB_G0 = 78
pkg debug/elf, const R_ARM_LDRS_SB_G0 R_ARM

    bigValues.add(BigInteger.valueOf(Long.MAX_VALUE).add(ONE));
    // Now add values near 2^N for lots of values of N.
    for (int exponent :
        asList(
            64,
            65,
            71,
            72,
            73,
            79,
            80,
            81,
            255,
            256,
            257,
            511,
            512,

{!../../../docs_src/security/tutorial005.py!}
```

下面，我们逐步说明修改的代码内容。

## OAuth2 安全方案

第一个修改的地方是，使用两个作用域 `me` 和 `items ` 声明 OAuth2 安全方案。

`scopes` 参数接收**字典**，键是作用域、值是作用域的描述：

```Python hl_lines="62-65"
{!../../../docs_src/security/tutorial005.py!}
```

因为声明了作用域，所以登录或授权时会在 API 文档中显示。

此处，选择给予访问权限的作用域： `me` 和 `items`。

这也是使用脸书、谷歌、GitHub 登录时的授权机制。

<img src="/img/tutorial/security/image11.png">

	_ = x[ErrReplicationNoExistingObjects-60]
	_ = x[ErrReplicationValidationError-61]
	_ = x[ErrReplicationPermissionCheckError-62]
	_ = x[ErrObjectRestoreAlreadyInProgress-63]
	_ = x[ErrNoSuchKey-64]
	_ = x[ErrNoSuchUpload-65]
	_ = x[ErrInvalidVersionID-66]
	_ = x[ErrNoSuchVersion-67]
	_ = x[ErrNotImplemented-68]
	_ = x[ErrPreconditionFailed-69]
	_ = x[ErrRequestTimeTooSkewed-70]
	_ = x[ErrSignatureDoesNotMatch-71]