模块  java.base
软件包  java.net

Class NetPermission

  • 实现的所有接口
    Serializable ， Guard 
    public final class NetPermission
extends BasicPermission
    此类用于各种网络权限。 NetPermission包含一个名称（也称为“目标名称”）但没有动作列表; 您要么拥有命名权限，要么不拥有。

    目标名称是网络权限的名称（见下文）。 命名约定遵循分层属性命名约定。 此外，星号可能出现在名称的末尾，在“。”之后，或单独出现，以表示通配符匹配。 例如：“foo。*”和“*”表示通配符匹配，而“* foo”和“a * b”表示不匹配。

    下表列出了所有可能的NetPermission目标名称，每个名称都提供了权限允许的描述以及授予代码权限的风险的讨论。

    Permission target name, what the permission allows, and associated risks Permission Target Name What the Permission Allows Risks of Allowing this Permission allowHttpTrace The ability to use the HTTP TRACE method in HttpURLConnection. Malicious code using HTTP TRACE could get access to security sensitive information in the HTTP headers (such as cookies) that it might not otherwise have access to. getCookieHandler The ability to get the cookie handler that processes highly security sensitive cookie information for an Http session. Malicious code can get a cookie handler to obtain access to highly security sensitive cookie information. Some web servers use cookies to save user private information such as access control information, or to track user browsing habit. getNetworkInformation The ability to retrieve all information about local network interfaces. Malicious code can read information about network hardware such as MAC addresses, which could be used to construct local IPv6 addresses. getProxySelector The ability to get the proxy selector used to make decisions on which proxies to use when making network connections. Malicious code can get a ProxySelector to discover proxy hosts and ports on internal networks, which could then become targets for attack. getResponseCache The ability to get the response cache that provides access to a local response cache. Malicious code getting access to the local response cache could access security sensitive information. requestPasswordAuthentication The ability to ask the authenticator registered with the system for a password Malicious code may steal this password. setCookieHandler The ability to set the cookie handler that processes highly security sensitive cookie information for an Http session. Malicious code can set a cookie handler to obtain access to highly security sensitive cookie information. Some web servers use cookies to save user private information such as access control information, or to track user browsing habit. setDefaultAuthenticator The ability to set the way authentication information is retrieved when a proxy or HTTP server asks for authentication Malicious code can set an authenticator that monitors and steals user authentication input as it retrieves the input from the user. setProxySelector The ability to set the proxy selector used to make decisions on which proxies to use when making network connections. Malicious code can set a ProxySelector that directs network traffic to an arbitrary network host. setResponseCache The ability to set the response cache that provides access to a local response cache. Malicious code getting access to the local response cache could access security sensitive information, or create false entries in the response cache. specifyStreamHandler The ability to specify a stream handler when constructing a URL Malicious code may create a URL with resources that it would normally not have access to (like file:/foo/fum/), specifying a stream handler that gets the actual bytes from someplace it does have access to. Thus it might be able to trick the system into creating a ProtectionDomain/CodeSource for a class even though that class really didn't come from that location.
    从以下版本开始：
    1.2
    另请参见：
    BasicPermission ， Permission ， Permissions ， PermissionCollection ， SecurityManager ， Serialized Form

    • 构造方法详细信息

      • NetPermission

        public NetPermission​(String name)
        创建具有指定名称的新NetPermission。 名称是NetPermission的符号名称，例如“setDefaultAuthenticator”等。星号可能出现在名称末尾，“。”之后，或者单独出现以表示通配符匹配。
        参数
        name - NetPermission的名称。
        异常
        NullPointerException - 如果 name是 null 。
        IllegalArgumentException - 如果 name为空。

      • NetPermission

        public NetPermission​(String name,
                     String actions)
        创建具有指定名称的新NetPermission对象。 该名称是NetPermission的符号名称，并且操作String当前未使用，应为null。
        参数
        name - NetPermission的名称。
        actions - 应为null。
        异常
        NullPointerException - 如果 name是 null 。
        IllegalArgumentException - 如果 name为空。