mirror of
https://gitlab.com/apparmor/apparmor
synced 2025-08-22 01:57:43 +00:00
d371458533
Cleanup the parse code by making shared prefix and perms classes for rules and convert rules to use them. Signed-off-by: John Johansen <john.johansen@canonical.com>
110 lines
2.4 KiB
C++
110 lines
2.4 KiB
C++
/*
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* Copyright (c) 2022
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* Canonical, Ltd. (All rights reserved)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, contact Novell, Inc. or Canonical
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* Ltd.
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*/
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#include "parser.h"
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#include "profile.h"
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#include "userns.h"
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#include <iomanip>
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#include <string>
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#include <iostream>
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#include <sstream>
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void userns_rule::move_conditionals(struct cond_entry *conds)
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{
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struct cond_entry *cond_ent;
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list_for_each(conds, cond_ent) {
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/* for now disallow keyword 'in' (list) */
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if (!cond_ent->eq)
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yyerror("keyword \"in\" is not allowed in userns rules\n");
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/* no valid conditionals atm */
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yyerror("invalid userns rule conditional \"%s\"\n",
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cond_ent->name);
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}
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}
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userns_rule::userns_rule(perms_t perms_p, struct cond_entry *conds)
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{
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if (perms_p) {
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if (perms_p & ~AA_VALID_USERNS_PERMS)
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yyerror("perms contains invalid permissions for userns\n");
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perms = perms_p;
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} else {
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/* default to all perms */
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perms = AA_VALID_USERNS_PERMS;
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}
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move_conditionals(conds);
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free_cond_list(conds);
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}
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ostream &userns_rule::dump(ostream &os)
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{
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prefix_rule_t::dump(os);
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os << "userns ";
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if (perms != AA_VALID_USERNS_PERMS) {
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if (perms & AA_USERNS_CREATE)
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os << "create ";
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}
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os << ",\n";
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return os;
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}
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int userns_rule::expand_variables(void)
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{
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return 0;
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}
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void userns_rule::warn_once(const char *name)
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{
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rule_t::warn_once(name, "userns rules not enforced");
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}
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int userns_rule::gen_policy_re(Profile &prof)
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{
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std::ostringstream buffer;
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std::string buf;
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if (!features_supports_userns) {
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warn_once(prof.name);
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return RULE_NOT_SUPPORTED;
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}
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buffer << "\\x" << std::setfill('0') << std::setw(2) << std::hex << AA_CLASS_NS;
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buf = buffer.str();
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if (perms & AA_VALID_USERNS_PERMS) {
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if (!prof.policy.rules->add_rule(buf.c_str(), deny, perms,
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audit == AUDIT_FORCE ? perms : 0,
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dfaflags))
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goto fail;
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}
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return RULE_OK;
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fail:
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return RULE_ERROR;
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}
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