auth_attr - authorization description database
/etc/security/auth_attr is a local source for authorization names and descriptions. The auth_attr file can be used with other authorization sources, including the auth_attr NIS map and NIS+ table. Programs use the getauthattr(3SECDB) routines to access this information.
The search order for multiple authorization sources is specified in the /etc/nsswitch.conf file, as described in the nsswitch.conf(4) man page.
An authorization is a right assigned to users that is checked by certain privileged programs to determine whether users can execute restricted functionality. Each entry in the auth_attr database consists of one line of text containing six fields separated by colons (:). Line continuations using the backslash (\) character are permitted. The format of each entry is:
prefix. or prefix.suffix
When there is no suffix, the name is defined as a heading. Headings are not assigned to users but are constructed for use by applications in their GUIs.
When a name ends with the word grant, the entry defines a grant authorization. Grant authorizations are used to support fine-grained delegation. Users with appropriate grant authorizations can delegate some of their authorizations to others. To assign an authorization, the user needs to have both the authorization itself and the appropriate grant authorization.
Example 1 Constructing a Name
In the following example, the name has a prefix (solaris.admin.usermgr) followed by a suffix (read):
Example 2 Defining a Heading
Because the name field ends with a dot, the following entry defines a heading:
Example 3 Assigning Separate Authorizations to Set User Attributes
In this example, a heading entry is followed by other associated authorization entries. The entries below the heading provide separate authorizations for setting user attributes. The attr field for each entry, including the heading entry, assigns a help file. The application that uses the help key requires the value to equal the name of a file ending in .htm or .html:
solaris.admin.usermgr.:::User Accounts::help=AuthUsermgrHeader.html solaris.admin.usermgr.pswd:::Change Password::help=AuthUserMgrPswd.html solaris.admin.usermgr.write:::Manage Users::help=AuthUsermgrWrite.html
Example 4 Assigning a Grant Authorization
This example assigns to an administrator the following authorizations:
solaris.admin.printer.grant solaris.admin.printer.delete solaris.admin.printer.modify solaris.admin.printer.read solaris.login.enable
With the above authorizations, the administrator can assign to others the solaris.admin.printer.delete, solaris.admin.printer.modify, and solaris.admin.printer.read authorizations, but not the solaris.login.enable authorization. If the administrator has both the grant authorization, solaris.admin.printmgr.grant, and the wildcard authorization, solaris.admin.printmgr.*, the administrator can grant to others any of the printer authorizations. See user_attr(4) for more information about how wildcards can be used to assign multiple authorizations whose names begin with the same components.
Example 5 Authorizing the Ability to Assign Other Authorizations
The following entry defines an authorization that grants the ability to assign any authorization created with a solaris prefix, when the administrator also has either the specific authorization being granted or a matching wildcard entry:
solaris.grant:::Grant All Solaris Authorizations::help=PriAdmin.html
Example 6 Consulting the Local Authorization File Ahead of the NIS Table
With the following entry from /etc/nsswitch.conf, the local auth_attr file is consulted before the NIS table:
getauthattr(3SECDB), getexecattr(3SECDB), getprofattr(3SECDB), getuserattr(3SECDB), exec_attr(4), nsswitch.conf(4), user_attr(4)
When deciding which authorization source to use, keep in mind that NIS+ provides stronger authentication than NIS.
Because the list of legal keys is likely to expand, any code that parses this database must be written to ignore unknown key-value pairs without error. When any new keywords are created, the names should be prefixed with a unique string, such as the company's stock symbol, to avoid potential naming conflicts.
Each application has its own requirements for whether the help value must be a relative pathname ending with a filename or the name of a file. The only known requirement is for the name of a file.
The following characters are used in describing the database format and must be escaped with a backslash if used as data: colon (:), semicolon (;), equals (=), and backslash (\).
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Created 1996-2023 by Maxim Chirkov
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