usmUserPublic=randomValue)

                 If you do the key change for yourself:

                   4) SET(usmUserSpinLock.0=sValue,
                          usmUserOwnAuthKeyChange=kcValue
                          usmUserPublic=randomValue)

                 If you get a response with error-status of noError,
                 then the SET succeeded and the new key is active.
                 If you do not get a response, then you can issue a
                 GET(usmUserPublic) and check if the value is equal

                 to the randomValue you did send in the SET. If so, then
                 the key change succeeded and the new key is active
                 (probably the response got lost). If not, then the SET
                 request probably never reached the target and so you
                 can start over with the procedure above.
                "
    DEFVAL      { ''H }    -- the empty string
    ::= { usmUserEntry 6 }

usmUserOwnAuthKeyChange OBJECT-TYPE
    SYNTAX       KeyChange   -- typically (SIZE (0 | 32)) for HMACMD5
                             -- typically (SIZE (0 | 40)) for HMACSHA
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "Behaves exactly as usmUserAuthKeyChange, with one
                 notable difference: in order for the set operation
                 to succeed, the usmUserName of the operation
                 requester must match the usmUserName that
                 indexes the row which is targeted by this
                 operation.
                 In addition, the USM security model must be
                 used for this operation.

                 The idea here is that access to this column can be
                 public, since it will only allow a user to change
                 his own secret authentication key (authKey).
                 Note that this can only be done once the row is active.

                 When a set is received and the usmUserName of the
                 requester is not the same as the umsUserName that
                 indexes the row which is targeted by this operation,
                 then a 'noAccess' error must be returned.

                 When a set is received and the security model in use
                 is not USM, then a 'noAccess' error must be returned.
                "
    DEFVAL      { ''H }    -- the empty string
    ::= { usmUserEntry 7 }

usmUserPrivProtocol OBJECT-TYPE
    SYNTAX       AutonomousType
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "An indication of whether messages sent on behalf of
                 this user to/from the SNMP engine identified by
                 usmUserEngineID, can be protected from disclosure,
                 and if so, the type of privacy protocol which is used.

                 An instance of this object is created concurrently
                 with the creation of any other object instance for
                 the same user (i.e., as part of the processing of
                 the set operation which creates the first object
                 instance in the same conceptual row).

                 If an initial set operation (i.e. at row creation time)
                 tries to set a value for an unknown or unsupported
                 protocol, then a 'wrongValue' error must be returned.

                 The value will be overwritten/set when a set operation
                 is performed on the corresponding instance of
                 usmUserCloneFrom.

                 Once instantiated, the value of such an instance of
                 this object can only be changed via a set operation to
                 the value of the usmNoPrivProtocol.

                 If a set operation tries to change the value of an
                 existing instance of this object to any value other
                 than usmNoPrivProtocol, then an 'inconsistentValue'
                 error must be returned.

                 Note that if any privacy protocol is used, then you
                 must also use an authentication protocol. In other
                 words, if usmUserPrivProtocol is set to anything else
                 than usmNoPrivProtocol, then the corresponding instance
                 of usmUserAuthProtocol cannot have a value of
                 usmNoAuthProtocol. If it does, then an
                 'inconsistentValue' error must be returned.
                "
    DEFVAL      { usmNoPrivProtocol }
    ::= { usmUserEntry 8 }

usmUserPrivKeyChange OBJECT-TYPE
    SYNTAX       KeyChange  -- typically (SIZE (0 | 32)) for DES
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "An object, which when modified, causes the secret
                 encryption key used for messages sent on behalf
                 of this user to/from the SNMP engine identified by
                 usmUserEngineID, to be modified via a one-way
                 function.

                 The associated protocol is the usmUserPrivProtocol.
                 The associated secret key is the user's secret
                 privacy key (privKey). The associated hash
                 algorithm is the algorithm used by the user's

                 usmUserAuthProtocol.

                 When creating a new user, it is an 'inconsistentName'
                 error for a set operation to refer to this object
                 unless it is previously or concurrently initialized
                 through a set operation on the corresponding instance
                 of usmUserCloneFrom.

                 When the value of the corresponding usmUserPrivProtocol
                 is usmNoPrivProtocol, then a set is successful, but
                 effectively is a no-op.

                 When this object is read, the zero-length (empty)
                 string is returned.
                 See the description clause of usmUserAuthKeyChange for
                 a recommended procedure to do a key change.
                "
    DEFVAL      { ''H }    -- the empty string
    ::= { usmUserEntry 9 }

usmUserOwnPrivKeyChange OBJECT-TYPE
    SYNTAX       KeyChange  -- typically (SIZE (0 | 32)) for DES
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "Behaves exactly as usmUserPrivKeyChange, with one
                 notable difference: in order for the Set operation
                 to succeed, the usmUserName of the operation
                 requester must match the usmUserName that indexes
                 the row which is targeted by this operation.
                 In addition, the USM security model must be
                 used for this operation.

                 The idea here is that access to this column can be
                 public, since it will only allow a user to change
                 his own secret privacy key (privKey).
                 Note that this can only be done once the row is active.

                 When a set is received and the usmUserName of the
                 requester is not the same as the umsUserName that
                 indexes the row which is targeted by this operation,
                 then a 'noAccess' error must be returned.

                 When a set is received and the security model in use
                 is not USM, then a 'noAccess' error must be returned.
                "
    DEFVAL      { ''H }    -- the empty string
    ::= { usmUserEntry 10 }

usmUserPublic    OBJECT-TYPE
    SYNTAX       OCTET STRING (SIZE(0..32))
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "A publicly-readable value which can be written as part
                 of the procedure for changing a user's secret
                 authentication and/or privacy key, and later read to
                 determine whether the change of the secret was
                 effected.
                "
    DEFVAL      { ''H }  -- the empty string
    ::= { usmUserEntry 11 }

usmUserStorageType OBJECT-TYPE
    SYNTAX       StorageType
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "The storage type for this conceptual row.

                 Conceptual rows having the value 'permanent' must
                 allow write-access at a minimum to:

                 - usmUserAuthKeyChange, usmUserOwnAuthKeyChange
                   and usmUserPublic for a user who employs
                   authentication, and
                 - usmUserPrivKeyChange, usmUserOwnPrivKeyChange
                   and usmUserPublic for a user who employs
                   privacy.

                 Note that any user who employs authentication or
                 privacy must allow its secret(s) to be updated and
                 thus cannot be 'readOnly'.

                 If an initial set operation tries to set the value to
                 'readOnly' for a user who employs authentication or
                 privacy, then an 'inconsistentValue' error must be
                 returned.  Note that if the value has been previously
                 set (implicit or explicit) to any value, then the rules
                 as defined in the StorageType Textual Convention apply.

                 It is an implementation issue to decide if a SET for
                 a readOnly or permanent row is accepted at all. In some
                 contexts this may make sense, in others it may not. If
                 a SET for a readOnly or permanent row is not accepted
                 at all, then a 'wrongValue' error must be returned.
                "
    DEFVAL      { nonVolatile }
    ::= { usmUserEntry 12 }

usmUserStatus    OBJECT-TYPE
    SYNTAX       RowStatus
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "The status of this conceptual row.

                 Until instances of all corresponding columns are
                 appropriately configured, the value of the
                 corresponding instance of the usmUserStatus column
                 is 'notReady'.

                 In particular, a newly created row for a user who
                 employs authentication, cannot be made active until the
                 corresponding usmUserCloneFrom and usmUserAuthKeyChange
                 have been set.

                 Further, a newly created row for a user who also
                 employs privacy, cannot be made active until the
                 usmUserPrivKeyChange has been set.

                 The RowStatus TC [RFC2579] requires that this
                 DESCRIPTION clause states under which circumstances
                 other objects in this row can be modified:

                 The value of this object has no effect on whether
                 other objects in this conceptual row can be modified,
                 except for usmUserOwnAuthKeyChange and
                 usmUserOwnPrivKeyChange. For these 2 objects, the
                 value of usmUserStatus MUST be active.
                "
    ::= { usmUserEntry 13 }

-- Conformance Information *******************************************

usmMIBCompliances OBJECT IDENTIFIER ::= { usmMIBConformance 1 }
usmMIBGroups      OBJECT IDENTIFIER ::= { usmMIBConformance 2 }

-- Compliance statements

usmMIBCompliance MODULE-COMPLIANCE
    STATUS       current
    DESCRIPTION "The compliance statement for SNMP engines which
                 implement the SNMP-USER-BASED-SM-MIB.
                "

    MODULE       -- this module
        MANDATORY-GROUPS { usmMIBBasicGroup }

        OBJECT           usmUserAuthProtocol
        MIN-ACCESS       read-only
        DESCRIPTION     "Write access is not required."

        OBJECT           usmUserPrivProtocol
        MIN-ACCESS       read-only
        DESCRIPTION     "Write access is not required."
    ::= { usmMIBCompliances 1 }

-- Units of compliance
usmMIBBasicGroup OBJECT-GROUP
    OBJECTS     {
                  usmStatsUnsupportedSecLevels,
                  usmStatsNotInTimeWindows,
                  usmStatsUnknownUserNames,
                  usmStatsUnknownEngineIDs,
                  usmStatsWrongDigests,
                  usmStatsDecryptionErrors,
                  usmUserSpinLock,
                  usmUserSecurityName,
                  usmUserCloneFrom,
                  usmUserAuthProtocol,
                  usmUserAuthKeyChange,
                  usmUserOwnAuthKeyChange,
                  usmUserPrivProtocol,
                  usmUserPrivKeyChange,
                  usmUserOwnPrivKeyChange,
                  usmUserPublic,
                  usmUserStorageType,
                  usmUserStatus
                }
    STATUS       current
    DESCRIPTION "A collection of objects providing for configuration
                 of an SNMP engine which implements the SNMP
                 User-based Security Model.
                "
    ::= { usmMIBGroups 1 }

END