org.snmp4j.security

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Java Source Code / Java Documentation » Net » snmp4j » org.snmp4j.security

org.snmp4j.security
org.snmp4j.security Provides classes and interfaces for authentication and privacy of SNMP(v3) messages. The `org.snmp4j.security` package contains three groups of classes and interfaces: The authentication protocols group contains interfaces and classes for authentication of SNMP(v3) messages. The privacy protocols group contains interfaces and classes for encryption and decryption of SNMP(v3) messages. The security model group combines authentication and privacy protocols to provide security services to message processing models. Authentication as well as privacy protocols are security protocols and thus both are derived from the common interface `SecurityProtocol`. In order to be able to use a security protocol with SNMP4J, the protocol implementation class has to be registered with the `SecurityProtocols` singleton, which provides access to authentication and privacy protocols. Authentication Protocols All SNMP4J authentication protocol implementations have to implement the `AuthenticationProtocol` interface. SNMP4J provides implementation for the following authentication protocols: MD5, which is implemented by `AuthMD5` and SHA, which is implemented by `AuthSHA`. Privacy Protocols All SNMP4J privacy protocol implementations have to implement the `PrivacyProtocol` interface. SNMP4J provides implementation for the following privacy protocols: DES in CBC mode, which is implemented by `PrivDES` and AES with 128bit key, which is implemented by `PrivAES128`. AES with 192bit key, which is implemented by `PrivAES192`. AES with 256bit key, which is implemented by `PrivAES256`. In order to be able to use 256bit strong encryption, the strong encryption enhancement package has to be downloaded and installed. Security Models All SNMP4J security models have to implement the `SecurityModel` interface. Before a security model can be used with SNMP4J, it has to be registered with the `SecurityModels` singleton which provides access to security models. SNMP4J implements a single security model, the User Based Security Model (USM). The `USM` 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. The following UML class diagram shows the most important classes of the `org.snmp4j.security` package and their relationships (relationships to other packages are not shown):
Java Source File Name	Type	Comment
AuthenticationProtocol.java	Interface	The `AuthenticationProtocol` interface defines a common interface for all SNMP authentication protocols.
AuthGeneric.java	Class	The abstract class AuthGeneric implements common operations for SNMP authentication protocols, such as MD5 and SHA.
AuthMD5.java	Class	The AuthMD5 class implements the MD5 authentication protocol.
AuthSHA.java	Class	The `SHA` class implements the Secure Hash Authentication.
ByteArrayWindow.java	Class	The `ByteArrayWindow` provides windowed access to a subarray of a byte array.
DecryptParams.java	Class	Parameter class for encrypt and decrypt methods of SecurityProtocol .
Priv3DES.java	Class	Privacy protocol class for Triple DES (DESEDE). This class uses DES-EDE in CBC mode to encrypt the data.
PrivacyProtocol.java	Interface	The `PrivacyProtocol` interface defines a common interface for all SNMP privacy protocols.
PrivAES.java	Class	Base class for PrivAES128, PrivAES192 and PrivAES256. This class uses AES in CFB mode to encrypt the data.
PrivAES128.java	Class	Encryption class for AES 128.
PrivAES192.java	Class	Encryption class for AES 192.
PrivAES256.java	Class	Encryption class for AES 256.
PrivDES.java	Class	Privacy protocol class for DES. This class uses DES in CBC mode to encrypt the data.
Salt.java	Class	Class that holds a 64 bit salt value for crypto operations. This class tries to use the SecureRandom class to initialize the salt value.
SecurityLevel.java	Class	The `SecurityLevel` interface contains enumerated values for the different security levels.
SecurityModel.java	Interface	The `SecurityModel` interface as described in RFC3411 �4.4.
SecurityModels.java	Class	The `SecurityModels` class is a collection of all supported security models of a SNMP entity.
SecurityParameters.java	Interface	The `SecurityParameters` interface represents the security parameters in a SNMPv3 message.
SecurityProtocol.java	Interface	The `SecurityProtocol` class defines common methods of authentication and privacy protocols.
SecurityProtocols.java	Class	The `SecurityProtocols` class holds all authentication and privacy protocols for a SNMP entity. To register security protocols other than the default, set the system property SecurityProtocols.SECURITY_PROTOCOLS_PROPERTIES to a customized version of the `SecurityProtocols.properties` file.
SecurityStateReference.java	Interface	The `SecurityStateReference` interface is an empty marker interface for security model dependend state references.
USM.java	Class	The `USM` class implements the User Based Security Model (USM) as defined in RFC3414.
UsmSecurityParameters.java	Class
UsmSecurityStateReference.java	Class	The `UsmSecurityStateReference` holds cached security data.
UsmTimeEntry.java	Class	The `UsmTimeEntry` class represents time synchronization information associated with an engine ID.
UsmTimeTable.java	Class	The `UsmTimeTable` class is a singleton that stores USM user information as part of the Local Configuration Datastore (LCD).
UsmUser.java	Class	The `UsmUser` class represents USM user providing information to secure SNMPv3 message exchange.
UsmUserEntry.java	Class	The `UsmUserEntry` class represents a user in the Local Configuration Datastore (LCD).
UsmUserTable.java	Class	The `UsmUserTable` class stores USM user information as part of the Local Configuration Datastore (LCD).

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org.snmp4j.security

Authentication Protocols

Privacy Protocols

Security Models