📄 package.html.svn-base
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><title>org.snmp4j.security</title><!--/*_############################################################################ _## _## SNMP4J _## _## Copyright 2003-2004 Frank Fock and Jochen Katz (SNMP4J.org) _## _## Licensed under the Apache License, Version 2.0 (the "License"); _## you may not use this file except in compliance with the License. _## You may obtain a copy of the License at _## _## http://www.apache.org/licenses/LICENSE-2.0 _## _## Unless required by applicable law or agreed to in writing, software _## distributed under the License is distributed on an "AS IS" BASIS, _## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. _## See the License for the specific language governing permissions and _## limitations under the License. _## _##########################################################################*/--></head><body bgcolor="white">Provides classes and interfaces for authentication and privacy of SNMP(v3)messages.<p>The <code>org.snmp4j.security</code> package contains three groups ofclasses and interfaces:<ul><li>The authentication protocols group contains interfaces and classes for authentication of SNMP(v3) messages.</li><li>The privacy protocols group contains interfaces and classes for encryption and decryption of SNMP(v3) messages.</li><li>The security model group combines authentication and privacy protocols to provide security services to message processing models.</li></ul></p><p> Authentication as well as privacy protocols are security protocols and thus both are derived from the common interface <code>SecurityProtocol</code>. In order to be able to use a security protocol with SNMP4J, the protocol implementation class has to be registered with the <code>SecurityProtocols</code> singleton, which provides access to authentication and privacy protocols.</p><h2>Authentication Protocols</h2><p>All SNMP4J authentication protocol implementations have to implement the<code>AuthenticationProtocol</code> interface. SNMP4J provides implementationfor the following authentication protocols:</p><ul> <li>MD5, which is implemented by <code>AuthMD5</code> and</li> <li>SHA, which is implemented by <code>AuthSHA</code>. </li></ul><h2>Privacy Protocols</h2><p> All SNMP4J privacy protocol implementations have to implement the<code>PrivacyProtocol</code> interface. SNMP4J provides implementationfor the following privacy protocols:</p><ul> <li>DES in CBC mode, which is implemented by <code>PrivDES</code> and</li> <li>AES with 128bit key, which is implemented by <code>PrivAES128</code>. </li> <li>AES with 192bit key, which is implemented by <code>PrivAES192</code>. </li> <li>AES with 256bit key, which is implemented by <code>PrivAES256</code>. In order to be able to use 256bit strong encryption, the strong encryption enhancement package has to be downloaded and installed. </li></ul><h2>Security Models</h2><p>All SNMP4J security models have to implement the <code>SecurityModel</code>interface. Before a security model can be used with SNMP4J, it has to beregistered with the <code>SecurityModels</code> singleton which providesaccess to security models. SNMP4J implements a single security model, the<em>User Based Security Model (USM)</em>.</p><p> The <code>USM</code> class uses a user name table (which contains user names) and a user table (which contains localized user information) to store user information. A time table is used to store time information about SNMP engines to protect SNMP communication against replay attacks if the corresponding security level has chosen.</p><p> The following UML class diagram shows the most important classes of the <code>org.snmp4j.security</code> package and their relationships (relationships to other packages are not shown):</p><img name="UML Class Diagram org.snmp4j.security" src="doc-files/org_snmp4j_security.gif"/></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -