policy.conf - configuration file for security policy
The policy.conf file provides the security policy configuration for user-level attributes. Each entry consists of a key/value pair in the form:
The following keys are defined:
PRIV_DEFAULT and PRIV_LIMIT
For maximum future compatibility, the privilege specifications should always include basic or all. Privileges should then be removed using negation. See EXAMPLES. By assigning privileges in this way, you avoid a situation where, following an addition of a currently unprivileged operation to the basic privilege set, a user unexpectedly does not have the privileges he needs to perform that now-privileged operation.
Note that removing privileges from the limit set requires extreme care, as any set-uid root program might suddenly fail because it lacks certain privilege(s). Note also that dropping basic privileges from the default privilege set can cause unexpected failure modes in applications.
The key/value pair must appear on a single line, and the key must start the line. Lines starting with # are taken as comments and ignored. Option name comparisons are case-insensitive.
Only one CRYPT_ALGORITHMS_ALLOW or CRYPT_ALGORITHMS_DEPRECATE value can be specified. Whichever is listed first in the file takes precedence. The algorithm specified for CRYPT_DEFAULT must either be specified for CRYPT_ALGORITHMS_ALLOW or not be specified for CRYPT_ALGORITHMS_DEPRECATE. If CRYPT_DEFAULT is not specified, the default is __unix__.
Example 1 Defining a Key/Value Pair
Example 2 Specifying Privileges
As noted above, you should specify privileges through negation, specifying all for PRIV_LIMIT and basic for PRIV_DEFAULT, then subtracting privileges, as shown below.
The first line, above, takes away only the sys_linkdir privilege. The second line takes away only the file_link privilege. These privilege specifications are unaffected by any future addition of privileges that might occur.
See attributes(5) for descriptions of the following attributes:
login(1), pfexec(1), chkauthattr(3SECDB), getexecuser(3SECDB), auth_attr(4), crypt.conf(4), prof_attr(4), user_attr(4), attributes(5), privileges(5)
The console user is defined as the owner of /dev/console.
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Created 1996-2023 by Maxim Chirkov
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