mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-26 11:47:31 +00:00
In preparation for 7.0 privilege cleanup, clean up style:
- Sort copyrights by date. - Re-wrap, and in some cases, fix comments. - Fix tabbing, white space, remove extra blank lines. - Remove commented out debugging printfs. Approved by: re (kensmith)
This commit is contained in:
Robert Watson
parent
542a8db549
commit
458f818f47
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=171253
@ -1,7 +1,7 @@
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/*-
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* Copyright (c) 2005 Tom Rhodes
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* Copyright (c) 1999-2002, 2007 Robert N. M. Watson
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* Copyright (c) 2001-2005 Networks Associates Technology, Inc.
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* Copyright (c) 2005 Tom Rhodes
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* All rights reserved.
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*
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* This software was developed by Robert Watson for the TrustedBSD Project.
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@ -38,8 +38,9 @@
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/*
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* Developed by the TrustedBSD Project.
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* "BSD Extended" MAC policy, allowing the administrator to impose
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* mandatory rules regarding users and some system objects.
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*
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* "BSD Extended" MAC policy, allowing the administrator to impose mandatory
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* firewall-like rules regarding users and file system objects.
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*/
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#include <sys/param.h>
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@ -88,23 +89,23 @@ SYSCTL_INT(_security_mac_bsdextended, OID_AUTO, rule_version, CTLFLAG_RD,
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&rule_version, 0, "Version number for API\n");
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/*
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* This is just used for logging purposes, eventually we would like
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* to log much more then failed requests.
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* This is just used for logging purposes, eventually we would like to log
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* much more then failed requests.
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*/
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static int mac_bsdextended_logging;
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SYSCTL_INT(_security_mac_bsdextended, OID_AUTO, logging, CTLFLAG_RW,
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&mac_bsdextended_logging, 0, "Log failed authorization requests");
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/*
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* This tunable is here for compatibility. It will allow the user
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* to switch between the new mode (first rule matches) and the old
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* functionality (all rules match).
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* This tunable is here for compatibility. It will allow the user to switch
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* between the new mode (first rule matches) and the old functionality (all
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* rules match).
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*/
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static int
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mac_bsdextended_firstmatch_enabled;
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SYSCTL_INT(_security_mac_bsdextended, OID_AUTO, firstmatch_enabled,
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CTLFLAG_RW, &mac_bsdextended_firstmatch_enabled, 1,
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"Disable/enable match first rule functionality");
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CTLFLAG_RW, &mac_bsdextended_firstmatch_enabled, 1,
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"Disable/enable match first rule functionality");
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static int
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mac_bsdextended_rule_valid(struct mac_bsdextended_rule *rule)
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@ -112,23 +113,17 @@ mac_bsdextended_rule_valid(struct mac_bsdextended_rule *rule)
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if ((rule->mbr_subject.mbs_flags | MBS_ALL_FLAGS) != MBS_ALL_FLAGS)
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return (EINVAL);
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if ((rule->mbr_subject.mbs_neg | MBS_ALL_FLAGS) != MBS_ALL_FLAGS)
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return (EINVAL);
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if ((rule->mbr_object.mbo_flags | MBO_ALL_FLAGS) != MBO_ALL_FLAGS)
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return (EINVAL);
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if ((rule->mbr_object.mbo_neg | MBO_ALL_FLAGS) != MBO_ALL_FLAGS)
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return (EINVAL);
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if ((rule->mbr_object.mbo_neg | MBO_TYPE_DEFINED) &&
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(rule->mbr_object.mbo_type | MBO_ALL_TYPE) != MBO_ALL_TYPE)
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return (EINVAL);
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if ((rule->mbr_mode | MBI_ALLPERM) != MBI_ALLPERM)
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return (EINVAL);
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return (0);
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}
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@ -142,12 +137,8 @@ sysctl_rule(SYSCTL_HANDLER_ARGS)
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error = 0;
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name = (int *)arg1;
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namelen = arg2;
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/* printf("bsdextended sysctl handler (namelen %d)\n", namelen); */
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if (namelen != 1)
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return (EINVAL);
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index = name[0];
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if (index >= MAC_BSDEXTENDED_MAXRULES)
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return (ENOENT);
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@ -162,7 +153,6 @@ sysctl_rule(SYSCTL_HANDLER_ARGS)
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}
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mtx_lock(&mac_bsdextended_mtx);
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if (req->oldptr) {
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if (index < 0 || index > rule_slots + 1) {
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error = ENOENT;
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@ -174,9 +164,7 @@ sysctl_rule(SYSCTL_HANDLER_ARGS)
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}
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temprule = *rules[index];
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}
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if (req->newptr && req->newlen == 0) {
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/* printf("deletion\n"); */
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KASSERT(ruleptr == NULL, ("sysctl_rule: ruleptr != NULL"));
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ruleptr = rules[index];
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if (ruleptr == NULL) {
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@ -189,52 +177,40 @@ sysctl_rule(SYSCTL_HANDLER_ARGS)
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error = mac_bsdextended_rule_valid(&temprule);
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if (error)
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goto out;
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if (rules[index] == NULL) {
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/* printf("addition\n"); */
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*ruleptr = temprule;
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rules[index] = ruleptr;
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ruleptr = NULL;
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if (index + 1 > rule_slots)
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rule_slots = index + 1;
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rule_count++;
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} else {
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/* printf("replacement\n"); */
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} else
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*rules[index] = temprule;
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}
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}
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out:
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mtx_unlock(&mac_bsdextended_mtx);
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if (ruleptr != NULL)
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FREE(ruleptr, M_MACBSDEXTENDED);
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if (req->oldptr && error == 0)
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error = SYSCTL_OUT(req, &temprule, sizeof(temprule));
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return (error);
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}
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SYSCTL_NODE(_security_mac_bsdextended, OID_AUTO, rules,
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CTLFLAG_RW, sysctl_rule, "BSD extended MAC rules");
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SYSCTL_NODE(_security_mac_bsdextended, OID_AUTO, rules, CTLFLAG_RW,
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sysctl_rule, "BSD extended MAC rules");
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static void
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mac_bsdextended_init(struct mac_policy_conf *mpc)
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{
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/* Initialize ruleset lock. */
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mtx_init(&mac_bsdextended_mtx, "mac_bsdextended lock", NULL, MTX_DEF);
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/* Register dynamic sysctl's for rules. */
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}
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static void
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mac_bsdextended_destroy(struct mac_policy_conf *mpc)
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{
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/* Destroy ruleset lock. */
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mtx_destroy(&mac_bsdextended_mtx);
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/* Tear down sysctls. */
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}
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static int
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@ -255,10 +231,8 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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cred->cr_ruid >= rule->mbr_subject.mbs_uid_min) ||
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(cred->cr_svuid <= rule->mbr_subject.mbs_uid_max &&
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cred->cr_svuid >= rule->mbr_subject.mbs_uid_min));
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if (rule->mbr_subject.mbs_neg & MBS_UID_DEFINED)
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match = !match;
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if (!match)
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return (0);
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}
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@ -268,9 +242,8 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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cred->cr_rgid >= rule->mbr_subject.mbs_gid_min) ||
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(cred->cr_svgid <= rule->mbr_subject.mbs_gid_max &&
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cred->cr_svgid >= rule->mbr_subject.mbs_gid_min));
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if (!match) {
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for (i = 0; i < cred->cr_ngroups; i++)
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for (i = 0; i < cred->cr_ngroups; i++) {
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if (cred->cr_groups[i]
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<= rule->mbr_subject.mbs_gid_max &&
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cred->cr_groups[i]
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@ -278,11 +251,10 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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match = 1;
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break;
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}
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}
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}
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if (rule->mbr_subject.mbs_neg & MBS_GID_DEFINED)
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match = !match;
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if (!match)
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return (0);
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}
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@ -290,10 +262,8 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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if (rule->mbr_subject.mbs_flags & MBS_PRISON_DEFINED) {
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match = (cred->cr_prison != NULL &&
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cred->cr_prison->pr_id == rule->mbr_subject.mbs_prison);
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if (rule->mbr_subject.mbs_neg & MBS_PRISON_DEFINED)
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match = !match;
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if (!match)
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return (0);
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}
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@ -304,10 +274,8 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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if (rule->mbr_object.mbo_flags & MBO_UID_DEFINED) {
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match = (vap->va_uid <= rule->mbr_object.mbo_uid_max &&
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vap->va_uid >= rule->mbr_object.mbo_uid_min);
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if (rule->mbr_object.mbo_neg & MBO_UID_DEFINED)
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match = !match;
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if (!match)
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return (0);
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}
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@ -315,10 +283,8 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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if (rule->mbr_object.mbo_flags & MBO_GID_DEFINED) {
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match = (vap->va_gid <= rule->mbr_object.mbo_gid_max &&
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vap->va_gid >= rule->mbr_object.mbo_gid_min);
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if (rule->mbr_object.mbo_neg & MBO_GID_DEFINED)
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match = !match;
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if (!match)
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return (0);
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}
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@ -327,56 +293,46 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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match = (bcmp(&(vp->v_mount->mnt_stat.f_fsid),
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&(rule->mbr_object.mbo_fsid),
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sizeof(rule->mbr_object.mbo_fsid)) == 0);
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if (rule->mbr_object.mbo_neg & MBO_FSID_DEFINED)
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match = !match;
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if (!match)
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return 0;
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return (0);
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}
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if (rule->mbr_object.mbo_flags & MBO_SUID) {
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match = (vap->va_mode & VSUID);
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if (rule->mbr_object.mbo_neg & MBO_SUID)
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match = !match;
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if (!match)
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return 0;
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return (0);
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}
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if (rule->mbr_object.mbo_flags & MBO_SGID) {
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match = (vap->va_mode & VSGID);
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if (rule->mbr_object.mbo_neg & MBO_SGID)
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match = !match;
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if (!match)
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return 0;
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return (0);
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}
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if (rule->mbr_object.mbo_flags & MBO_UID_SUBJECT) {
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match = (vap->va_uid == cred->cr_uid ||
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vap->va_uid == cred->cr_ruid ||
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vap->va_uid == cred->cr_svuid);
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if (rule->mbr_object.mbo_neg & MBO_UID_SUBJECT)
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match = !match;
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if (!match)
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return 0;
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return (0);
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}
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if (rule->mbr_object.mbo_flags & MBO_GID_SUBJECT) {
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match = (groupmember(vap->va_gid, cred) ||
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vap->va_gid == cred->cr_rgid ||
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vap->va_gid == cred->cr_svgid);
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if (rule->mbr_object.mbo_neg & MBO_GID_SUBJECT)
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match = !match;
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if (!match)
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return 0;
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return (0);
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}
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if (rule->mbr_object.mbo_flags & MBO_TYPE_DEFINED) {
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@ -405,12 +361,10 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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default:
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match = 0;
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}
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if (rule->mbr_object.mbo_neg & MBO_TYPE_DEFINED)
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match = !match;
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if (!match)
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return 0;
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return (0);
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}
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/*
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@ -420,8 +374,9 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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if (mac_bsdextended_logging)
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log(LOG_AUTHPRIV, "mac_bsdextended: %d:%d request %d"
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" on %d:%d failed. \n", cred->cr_ruid,
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cred->cr_rgid, acc_mode, vap->va_uid, vap->va_gid);
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return (EACCES); /* Matching rule denies access */
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cred->cr_rgid, acc_mode, vap->va_uid,
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vap->va_gid);
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return (EACCES);
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}
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/*
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@ -431,7 +386,7 @@ mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule,
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if (mac_bsdextended_firstmatch_enabled)
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return (EJUSTRETURN);
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else
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return(0);
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return (0);
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}
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static int
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@ -441,7 +396,7 @@ mac_bsdextended_check(struct ucred *cred, struct vnode *vp, struct vattr *vap,
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int error, i;
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/*
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* XXXRW: More specific privilege selection needed?
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* XXXRW: More specific privilege selection needed.
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*/
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if (suser_cred(cred, 0) == 0)
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return (0);
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@ -453,12 +408,10 @@ mac_bsdextended_check(struct ucred *cred, struct vnode *vp, struct vattr *vap,
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acc_mode &= ~MBI_APPEND;
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acc_mode |= MBI_WRITE;
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}
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mtx_lock(&mac_bsdextended_mtx);
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for (i = 0; i < rule_slots; i++) {
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if (rules[i] == NULL)
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continue;
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error = mac_bsdextended_rulecheck(rules[i], cred,
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vp, vap, acc_mode);
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if (error == EJUSTRETURN)
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@ -480,11 +433,9 @@ mac_bsdextended_check_vp(struct ucred *cred, struct vnode *vp, int acc_mode)
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if (!mac_bsdextended_enabled)
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return (0);
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error = VOP_GETATTR(vp, &vap, cred, curthread);
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if (error)
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return (error);
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return (mac_bsdextended_check(cred, vp, &vap, acc_mode));
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}
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@ -562,7 +513,6 @@ mac_bsdextended_check_vnode_delete(struct ucred *cred, struct vnode *dvp,
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error = mac_bsdextended_check_vp(cred, dvp, MBI_WRITE);
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if (error)
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return (error);
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return (mac_bsdextended_check_vp(cred, vp, MBI_WRITE));
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}
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@ -619,7 +569,6 @@ mac_bsdextended_check_vnode_link(struct ucred *cred, struct vnode *dvp,
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error = mac_bsdextended_check_vp(cred, dvp, MBI_WRITE);
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if (error)
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return (error);
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error = mac_bsdextended_check_vp(cred, vp, MBI_WRITE);
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if (error)
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return (error);
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@ -676,9 +625,7 @@ mac_bsdextended_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
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error = mac_bsdextended_check_vp(cred, dvp, MBI_WRITE);
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if (error)
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return (error);
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error = mac_bsdextended_check_vp(cred, vp, MBI_WRITE);
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return (error);
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return (mac_bsdextended_check_vp(cred, vp, MBI_WRITE));
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}
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static int
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@ -691,10 +638,8 @@ mac_bsdextended_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
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error = mac_bsdextended_check_vp(cred, dvp, MBI_WRITE);
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if (error)
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return (error);
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if (vp != NULL)
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error = mac_bsdextended_check_vp(cred, vp, MBI_WRITE);
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return (error);
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}
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@ -40,10 +40,10 @@
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#define MB_VERSION 2 /* Used to check library and kernel are the same. */
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/*
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* Rights that can be represented in mbr_mode. These have the same values
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* as the V* rights in vnode.h, but in order to avoid sharing user and
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* kernel constants, we define them here. That will also improve ABI
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* stability if the in-kernel values change.
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* Rights that can be represented in mbr_mode. These have the same values as
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* the V* rights in vnode.h, but in order to avoid sharing user and kernel
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* constants, we define them here. That will also improve ABI stability if
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* the in-kernel values change.
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*/
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#define MBI_EXEC 000100
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#define MBI_WRITE 000200
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