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https://gitlab.com/apparmor/apparmor.git
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197d00d21a
Extend the policy syntax to have a rule that allows specifying all permissions for all rule types. allow all, This is useful for making blacklist based policy, but can also be useful when combined with other rule prefixes, eg. to add audit to all rules. audit access all, Signed-off-by: John Johansen <john.johansen@canonical.com>
142 lines
3.3 KiB
C++
142 lines
3.3 KiB
C++
/*
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* Copyright (c) 2023
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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 Canonical Ltd.
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*/
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#include "common_optarg.h"
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#include "parser.h"
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#include "profile.h"
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#include "io_uring.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 io_uring_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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/* disallow keyword 'in' (list) */
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if (!cond_ent->eq)
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yyerror("keyword \"in\" is not allowed in io_uring rules\n");
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if (list_len(cond_ent->vals) > 1)
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yyerror("io_uring conditional \"%s\" only supports a single value\n",
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cond_ent->name);
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if (strcmp(cond_ent->name, "label") == 0) {
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move_conditional_value("io_uring", &label, cond_ent);
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} else {
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yyerror("invalid io_uring conditional \"%s\"\n",
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cond_ent->name);
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}
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}
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}
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io_uring_rule::io_uring_rule(perms_t perms_p, struct cond_entry *conds, struct cond_entry *ring_conds):
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perms_rule_t(AA_CLASS_IO_URING), label(NULL)
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{
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if (perms_p) {
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if (perms_p & ~AA_VALID_IO_URING_PERMS) {
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yyerror("perms contains invalid permissions for io_uring\n");
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}
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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_IO_URING_PERMS;
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}
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move_conditionals(conds);
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move_conditionals(ring_conds);
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free_cond_list(conds);
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free_cond_list(ring_conds);
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}
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ostream &io_uring_rule::dump(ostream &os)
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{
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class_rule_t::dump(os);
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if (perms != AA_VALID_IO_URING_PERMS) {
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os << " ( ";
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if (perms & AA_IO_URING_OVERRIDE_CREDS)
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os << "override_creds ";
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if (perms & AA_IO_URING_SQPOLL)
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os << " sqpoll ";
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os << ")";
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}
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if (label)
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os << " label=" << label;
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os << ",\n";
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return os;
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}
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int io_uring_rule::expand_variables(void)
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{
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return 0;
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}
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void io_uring_rule::warn_once(const char *name)
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{
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rule_t::warn_once(name, "io_uring rules not enforced");
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}
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int io_uring_rule::gen_policy_re(Profile &prof)
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{
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std::ostringstream buffer;
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std::string buf, labelbuf;
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if (!features_supports_io_uring) {
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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_IO_URING;
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buf = buffer.str();
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if (label) {
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if (!convert_entry(labelbuf, label))
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goto fail;
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buffer << labelbuf;
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} else {
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buffer << default_match_pattern;
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}
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if (perms & AA_VALID_IO_URING_PERMS) {
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if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY, perms,
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audit == AUDIT_FORCE ? perms : 0,
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parseopts))
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goto fail;
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if (perms & AA_IO_URING_OVERRIDE_CREDS) {
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buf = buffer.str(); /* update buf to have label */
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if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY,
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perms, audit == AUDIT_FORCE ? perms : 0,
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parseopts))
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goto fail;
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}
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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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