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Configuring Authentication
This topic includes the following sections:
Configuring the Authentication Server
Note: You only need to configure the authentication server, if you have specified a value of USER_AUTH or higher for the SECURITY parameter and are using the default authentication plug-in.
Authentication requires that an authentication server be configured for the purpose of authenticating users by checking their individual passwords against a file of legal users. The BEA Tuxedo system uses a default authentication server called AUTHSRV to perform authentication. AUTHSVR provides a single service, AUTHSVC, which performs authentication. AUTHSVC is advertised by the AUTHSVR server as AUTHSVC when the security level is set to ACL or MANDATORY_ACL.
For a CORBA application to authenticate users, the value of the AUTHSVC parameter in the RESOURCES section of the UBBCONFIG file needs to specify the name of the process to be used as the authentication server for the CORBA application. The service must be called AUTHSVC. If the AUTHSVC parameter is specified in the RESOURCES section of the UBBCONFIG file, the SECURITY parameter must also be specified with a value of at least USER_AUTH. If the value is not specified, an error will occur when the system executes the tmloadcf command. If the -m option is configured on the ISL process in the UBBCONFIG file, the AUTHSVC must be defined in the UBBCONFIG file before the ISL process.
In addition, you need to define AUTHSVR in the SERVERS section of the UBBCONFIG file. The SERVERS section contains information about the server processes to be booted in the CORBA application. To add AUTHSVC to an application, you need to define AUTHSVC as the authentication service and AUTHSVR as the authentication server in the UBBCONFIG file. Listing 7-1 contains the portion of the UBBCONFIG file that defines the authentication server.
Listing 7-1 Parameters for the Authentication Server
*RESOURCES
SECURITY USER_AUTH
AUTHSVC "AUTHSVC"
.
.
.
*SERVERS
AUTHSVR SRVGRP="group_name" SRVID=1 RESTART=Y GRACE=600 MAXGEN=2 CLOPT="-A"
If you omit the parameter-value entry AUTHSVC, the BEA Tuxedo system calls AUTHSVC by default.
AUTHSVR may be replaced with an authentication server that implements logic specific to the application. For example, a company may want to develop a custom authentication server so that it can use the popular Kerberos mechanism for authentication.
To add a custom authentication service to an application, you need to define your authentication service and server in the UBBCONFIG file. For example:
*RESOURCES
SECURITY USER_AUTH
AUTHSVC KERBEROS
.
.
.
*SERVERS
KERBEROSSVR SRVGRP="group_name" SRVID=1 RESTART=Y GRACE=600 MAXGEN=2 CLOPT="-A"
Once you configure the default authentication server, the identity of the IIOP Listener/Handler (as specified in the SEC_PRINCIPAL_NAME parameter in the UBBCONFIG file) must be specified in the tpusr file. In addition, all the users of the CORBA application must be specified in the tpusr file. For more information, see Defining Authorized Users.
Defining Authorized Users
As part of configuring security for a CORBA application, you need to define the principals and groups of principals who have access to the CORBA application.
Authorized users can be defined in the following ways:
You use the tpusradd command to create files containing lists of authorized principals. The tpusradd command adds a new principal entry to the BEA Tuxedo security data files. This information is used by the authentication server to authenticate principals. The file that contains the principals is called tpusr.
The file is a colon-delimited, flat ASCII file, readable only by the system administrator of the CORBA application. The system file entries have a limit of 512 characters per line. The file is kept in the application directory, specified by the environment variable $APPDIR. The environment variable $APPDIR must be set to the pathname of the CORBA application.
The tpusradd file should be owned by the administrator account. BEA recommends that the file be protected so that only the owner has read and write privileges for the file and all other users have only read privileges for the file.
The tpusradd command has the following options:
The user identification number. The UID must be a positive decimal integer below 128K. The UID must be unique within the list of existing identifiers for the application. The UID defaults to the next available (unique) identifier greater than 0.
The group identification number. The GID can be an integer identifier or character-string name. This option defines the new user's group membership. It defaults to the other group (identifier 0).
A string of printable characters that specifies the name of the principal. The name may not contain a colon (:). pound sign (#), or a newline (\n). The principal name must be unique within the list of existing principals for the CORBA application.
A string of printable characters that specifies the new login name of the user. The name may not contain a colon (:). pound sign (#), or a newline (\n). The user name must be unique within the list of existing users for the CORBA application
If you are using the default authentication server, the identity of the IIOP Listener/Handler (as specified in the SEC_PRINCIPAL_NAME parameter in the UBBCONFIG file) must be specified in the tpusr file. In addition, all the users of the CORBA application must be specified in the tpusr file.
If you are using a custom authentication service, define the IIOP Listener/Handler and the users of the CORBA application in the user registry of the custom authentication service. In addition, no file called tpusr should appear in $APPDIR. If a file by that name exists, a CORBA/NO_PERMISSION exception will be raised.
Listing 7-2 includes a sample tpusr file.
Listing 7-2 Sample tpusr File
Usrname Cltname Password Entry Uid GID
milozzi "bar" 2 100 0
smart " " 1 1 0
pat "tpsysadmin" 3 0 8192
butler "tpsysadmin" 3 N/A 8192
Note: Use the tpgrpadd command to add groups of principals to the BEA Tuxedo security data files.
In addition to the tpusradd and tpgrpadd commands, the BEA Tuxedo product provides the following commands to modify the tpusr and tpgrp files:
For a complete description of the commands, see the BEA Tuxedo Command Reference in the BEA Tuxedo online documentation.
You may already have files containing lists of users and groups on your host system. You can use them as the user and group files for your CORBA application, but only after converting them to the format required by the BEA Tuxedo system. To convert your files, run the tpaclcvt command, as shown in the following sample procedure. The sample procedure is written for a UNIX host machine.
tpaclcvt -u /etc/password
This command creates the tpusr file and stores the converted data in it. If the tpusr file already exists, tpaclcvt adds the converted data to the file, but it does not add duplicate user information to the file.
Note: For systems on which a shadow password file is used, you are prompted to enter a password for each user in the file.
tpaclcvt -g /etc/group
This command creates the tpgrp file and stores the converted data in it. If the tpgrp file already exists, tpaclcvt adds the converted data to the file, but it does not add duplicate group information to the file.
Defining a Security Level
As part of defining security for a CORBA application, you need to define the SECURITY parameter in the RESOURCES section of the UBBCONFIG file. The SECURITY parameter has the following format:
*RESOURCES
SECURITY {NONE|APP_PW|USER_AUTH|ACL|MANDATORY_ACL}
Table 7-1 describes the values for the SECURITY parameter.
Note: If the IIOP Listener/Handler is configured for using certificate authentication, the value of the SECURITY parameter must be USER_AUTH or greater.
Configuring Application Password Security
To configure application password security, complete the following steps:
Configuring Password Authentication
Password authentication requires that in addition to the application password, each client application must provide a valid username and user-specific data, such as a password, to interact with the CORBA application. The password must match the password associated with the username stored in the tpusr file. The checking of user passwords against the username/password combination in the tpusr file is carried out by the authentication service AUTHSVC, which is provided by the authentication server AUTHSVR.
To enable password authentication, complete the following steps:
*RESOURCES
SECURITY USER_AUTH
AUTHSVC "AUTHSVC"
.
.
.
*SERVERS
AUTHSVR SRVGRP="group_name" SRVID=1 RESTART=Y GRACE=600 MAXGEN=2 CLOPT="-A"
CLOPT="-A" causes the tmboot command to pass only the default command-line options (invoked by "-A") to AUTHSVR when the tmboot command starts the application.
Sample UBBCONFIG File for Password Authentication
Listing 7-4 includes a UBBCONFIG file for an application which uses password authentication. The key sections of the UBBCONFIG file are noted in boldface text.
Listing 7-3 Sample UBBCONFIG File for Password Authentication
*RESOURCES
IPCKEY 55432
DOMAINID securapp
MASTER SITE1
MODEL SHM
LDBAL N
SECURITY USER_AUTH
AUTHSVR "AUTHSVC"
*MACHINES
"ICEAXE"
LMID = SITE1
APPDIR = "D:\TUXDIR\samples\corba\SECURAPP"
TUXCONFIG = "D:\TUXDIR\samples\corba\SECURAPP\results
\tuxconfig"
TUXDIR = "D:\Tux8"
MAXWSCLIENTS = 10
*GROUPS
SYS_GRP
LMID = SITE1
GRPNO = 1
APP_GRP
LMID = SITE1
GRPNO = 2
*SERVERS
DEFAULT:
RESTART = Y
MAXGEN = 5
AUTHSVR
SRVGRP = SYS_GRP
SRVID = 1
RESTART = Y
GRACE = 60
MAXGEN = 2
TMSYSEVT
SRVGRP = SYS_GRP
SRVID = 1
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 2
CLOPT = "-A -- -N -M"
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 3
CLOPT = "-A -- -N"
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 4
CLOPT = "-A -- -F"
simple_server
SRVGRP = APP_GRP
SRVID = 1
RESTART = N
ISL
SRVGRP = SYS_GRP
SRVID = 5
CLOPT = "-A -- -n //PCWIZ::2500"
SEC_PRINCIPAL_NAME="IIOPListener"
SEC_PRINCIPAL_PASSVAR="ISH_PASS"
Configuring Certificate Authentication
Certificate authentication uses the SSL protocol so you need to install the license for the SSL protocol and configure the SSL protocol before you can use certificate authentication. Information about installing the license for the SSL protocol can be found in Installing the BEA Tuxedo System. For information about configuring the SSL protocol, see Configuring the SSL Protocol.
You also need an LDAP-enabled directory and certificate authority in place before using certificate authentication in a CORBA application. You can choose any LDAP-enabled directory service. You can also choose the certificate authority from which to obtain certificates and private keys used in a CORBA application. For more information, see Managing Public Key Security.
To enable certificate authentication, complete the following steps:
Windows 2000
%TUXDIR%\udataobj\security\keys
UNIX
$TUXDIR/udataobj/security/keys
*RESOURCES
SECURITY USER_AUTH
To enable certificate authentication, complete one of the following:
Enabling certificate authentication requires the license for the SSL protocol to be installed. If the -a option or the -ORBmutualAuth command-line option is executed and a license to enable the use of the SSL protocol does not exist, the IIOP Listener/Handler or CORBA C++ ORB will not start.
Sample UBBCONFIG File for Certificate Authentication
Listing 7-4 includes a UBBCONFIG file for a CORBA application which uses certificate authentication. The key sections of the UBBCONFIG file are noted in boldface text.
Listing 7-4 Sample UBBCONFIG File for Certificate Authentication
*RESOURCES
IPCKEY 55432
DOMAINID simpapp
MASTER SITE1
MODEL SHM
LDBAL N
SECURITY USER_AUTH
AUTHSVR "AUTHSVC"
*MACHINES
"ICEAXE"
LMID = SITE1
APPDIR = "D:\TUXDIR\samples\corba\SIMPAP~1"
TUXCONFIG = "D:\TUXDIR\samples\corba\SIMPAP~1
\results\tuxconfig"
TUXDIR = "D:\TUX8"
MAXWSCLIENTS = 10
*GROUPS
SYS_GRP
LMID = SITE1
GRPNO = 1
APP_GRP
LMID = SITE1
GRPNO = 2
*SERVERS
DEFAULT:
RESTART = Y
MAXGEN = 5
AUTHSVR
SRVGRP = SYS_GRP
SRVID = 1
RESTART = Y
GRACE = 60
MAXGEN = 2
TMSYSEVT
SRVGRP = SYS_GRP
SRVID = 1
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 2
CLOPT = "-A -- -N -M"
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 3
CLOPT = "-A -- -N"
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 4
CLOPT = "-A -- -F"
simple_server
SRVGRP = APP_GRP
SRVID = 1
RESTART = N
ISL
SRVGRP = SYS_GRP
SRVID = 5
CLOPT = "-A -- -a -z40 -Z128 -S2458 -n //ICEAXE:2468"
SEC_PRINCIPAL_NAME="IIOPListener"
SEC_PRINCIPAL_LOCATION="IIOPListener.pem"
SEC_PRINCIPAL_PASSVAR="ISH_PASS"
Configuring Access Control
Note: Access control only applies to the default authorization implementation. The default authorization provider for the CORBA security environment does not enforce access control checks. In addition, the setting of the SECURITY parameter in the UBBCONFIG file does not control or enforce access control used by third-party authorization implementation.
There are two levels of access control security: optional access control list (ACL) and mandatory access control list (MANDATORY_ACL). Only when users are authenticated to join an application does the access control list become active.
By using an access control list, a system administrator can organize users into groups and associate the groups with objects that the member users have permission to access. Access control is done at the group level for the following reasons:
When using the default authorization provider, the access control checking feature is based on the following files that are created and maintained by the system administrator:
Configuring Optional ACL Security
The difference between ACL and MANDATORY_ACL is the following.
Optional ACL Security requires that each client provide an application password, a username, and user-specific data, such as a password, to join the application.
To configure optional ACL security, complete the following steps:
*RESOURCES
SECURITY ACL
AUTHSVC "AUTHSVC"
.
.
.
*SERVERS
AUTHSVR SRVGRP="group_name" SRVID=1 RESTART=Y GRACE=600 MAXGEN=2 CLOPT="-A"
CLOPT="-A" causes the tmboot command to pass only the default command-line options (invoked by "-A") to AUTHSVR when the tmboot command starts the application. By default, AUTHSVR uses the user information in the tpusr file to authenticate clients that want to interact with the CORBA application.
Configuring Mandatory ACL Security
Mandatory ACL security level requires that each client provide an application password, a username, and user-specific data, such as a password, to interact with the CORBA application.
To configure mandatory ACL security, perform the following steps:
*RESOURCES
SECURITY MANDATORY_ACL
AUTHSVC ..AUTHSVC
.
.
.
*SERVERS
AUTHSVR SRVGRP="group_name" SRVID=1 RESTART=Y GRACE=600 MAXGEN=2 CLOPT="-A"
CLOPT="-A" causes the tmboot command to pass only the default command-line options (invoked by "-A") to AUTHSVR when the tmboot command starts the application. By default, AUTHSVR uses the client user information in the tpusr file named to authenticate clients that want to join the application. The tpusr file resides in the directory referenced by the first pathname defined in the application's APPDIR variable.
Setting ACL Policy Between CORBA Applications
As the administrator, you use the following configuration parameters to set and control the access control list (ACL) policy between CORBA applications that reside in different BEA Tuxedo domains.
.The following bullets explain how the ACL_POLICY configuration affects the operation of local domain gateway (GWTDOMAIN) processes.
In this configuration, each application has an ACL database containing entries only for users in its own domain.
Impersonating the Remote Domain Gateway
If the domain gateway receives a client request from a remote domain for which the ACL_POLICY parameter is set (or defaulted) to LOCAL in the local DMCONFIG file, the domain gateway removes any tokens from the request and creates an application key containing the DOMAINID of the remote domain access point.
Example DMCONFIG Entries for ACL Policy
In Listing 7-5, the connection through the remote domain access point b01 is configured for global ACL in the local DMCONFIG file, meaning that the domain gateway process for domain access point c01 passes client requests from and to domain access point b01 without change.
Listing 7-5 Sample DMCONFIG File for ACL Policy
*DM_LOCAL_DOMAINS
# <LDOM name> <Gateway Group name> <domain type> <domain id>
# [<connection principal name>] [<security>]...
c01 GWGRP=bankg1
TYPE=TDOMAIN
DOMAINID="BA.CENTRAL01"
CONN_PRINCIPAL_NAME="BA.CENTRAL01"
SECURITY=DM_PW
.
.
.
*DM_REMOTE_DOMAINS
# <RDOM name> <domain type> <domain id> [<ACL policy>]
# [<connection principal name>] [<local principal name>]...
b01 TYPE=TDOMAIN
DOMAINID="BA.BANK01"
ACL_POLICY=GLOBAL
CONN_PRINCIPAL_NAME="BA.BANK01"
Configuring Security to Interoperate with Older WebLogic Enterprise Client Applications
It may be necessary for CORBA erver applications in a BEA Tuxedo domain to securely interoperate with client applications that were built with the security features available in the 4.2 and 5.0 releases of the WebLogic Enterprise product. To allow CORBA server applications to interoperate with older, secure client applications, you need to either set the CLOPT -t option in the UBBCONFIG file or specify the -ORBinterOp command-line option on the CORBA object request broker (ORB).
By setting the CLOPT -t option or specifying the -ORBinterOP command-line option, you are lowering the effective level of security for a CORBA server. Therefore, the use of compatibility mode should be carefully considered before enabling the mode in a server application.
You need to set the CLOPT -t option on any server applications that will interoperate with the older client application. The CLOPT -t option is specified in the *SERVERS section of the UBBCONFIG file.
Listing 7-6 Example UBBCONFIG File Entries for Interoperability
*SERVERS
SecureSrv SRVGRP=group_name SRVID=server_number
CLOPT=A -t..
If you are using a remote CORBA C++ ORB, specify the -ORBinterOp command-line option on the ORB to allow the ORB to interoperate with client application using the security features in the 4.2 or 5.0 releases of the WebLogic Enterprise product.
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Copyright © 2001 BEA Systems, Inc. All rights reserved.
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