mirror of
https://gitlab.com/apparmor/apparmor.git
synced 2025-03-04 08:24:42 +01:00
e84e481263
In preparation for more flags (not all of the backend dfa based), rework the optimization and dump flag handling which has been exclusively around the dfa up to this point. - split dfa control and dump flags into separate fields. This gives more room for new flags in the existing DFA set - rename DFA_DUMP, and DFA_CONTROL to CONTROL_DFA and DUMP_DFA as this will provide more uniform naming for none dfa flags - group dump and control flags into a structure so they can be passed together. Signed-off-by: John Johansen <john.johansen@canonical.com>
146 lines
3.4 KiB
C++
146 lines
3.4 KiB
C++
/*
|
|
* Copyright (c) 2014
|
|
* Canonical, Ltd. (All rights reserved)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of version 2 of the GNU General Public
|
|
* License published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, contact Novell, Inc. or Canonical
|
|
* Ltd.
|
|
*/
|
|
|
|
#include "parser.h"
|
|
#include "profile.h"
|
|
#include "ptrace.h"
|
|
|
|
#include <iomanip>
|
|
#include <string>
|
|
#include <sstream>
|
|
|
|
int parse_ptrace_perms(const char *str_perms, perms_t *perms, int fail)
|
|
{
|
|
return parse_X_perms("ptrace", AA_VALID_PTRACE_PERMS, str_perms, perms, fail);
|
|
}
|
|
|
|
void ptrace_rule::move_conditionals(struct cond_entry *conds)
|
|
{
|
|
struct cond_entry *cond_ent;
|
|
|
|
list_for_each(conds, cond_ent) {
|
|
/* for now disallow keyword 'in' (list) */
|
|
if (!cond_ent->eq)
|
|
yyerror("keyword \"in\" is not allowed in ptrace rules\n");
|
|
|
|
if (strcmp(cond_ent->name, "peer") == 0) {
|
|
move_conditional_value("ptrace", &peer_label, cond_ent);
|
|
} else {
|
|
yyerror("invalid ptrace rule conditional \"%s\"\n",
|
|
cond_ent->name);
|
|
}
|
|
}
|
|
}
|
|
|
|
ptrace_rule::ptrace_rule(perms_t perms_p, struct cond_entry *conds):
|
|
perms_rule_t(AA_CLASS_PTRACE), peer_label(NULL)
|
|
{
|
|
if (perms_p) {
|
|
if (perms_p & ~AA_VALID_PTRACE_PERMS)
|
|
yyerror("perms contains invalid permissions for ptrace\n");
|
|
perms = perms_p;
|
|
} else {
|
|
perms = AA_VALID_PTRACE_PERMS;
|
|
}
|
|
|
|
move_conditionals(conds);
|
|
free_cond_list(conds);
|
|
}
|
|
|
|
ostream &ptrace_rule::dump(ostream &os)
|
|
{
|
|
class_rule_t::dump(os);
|
|
|
|
/* override default perm dump */
|
|
if (perms != AA_VALID_PTRACE_PERMS) {
|
|
os << " (";
|
|
|
|
if (perms & AA_MAY_READ)
|
|
os << "read ";
|
|
if (perms & AA_MAY_READBY)
|
|
os << "readby ";
|
|
if (perms & AA_MAY_TRACE)
|
|
os << "trace ";
|
|
if (perms & AA_MAY_TRACEDBY)
|
|
os << "tracedby ";
|
|
os << ")";
|
|
}
|
|
|
|
if (peer_label)
|
|
os << " " << peer_label;
|
|
|
|
os << ",\n";
|
|
|
|
return os;
|
|
}
|
|
|
|
|
|
int ptrace_rule::expand_variables(void)
|
|
{
|
|
return expand_entry_variables(&peer_label);
|
|
}
|
|
|
|
void ptrace_rule::warn_once(const char *name)
|
|
{
|
|
rule_t::warn_once(name, "ptrace rules not enforced");
|
|
}
|
|
|
|
int ptrace_rule::gen_policy_re(Profile &prof)
|
|
{
|
|
std::ostringstream buffer;
|
|
std::string buf;
|
|
|
|
pattern_t ptype;
|
|
int pos;
|
|
|
|
/* ?? do we want to generate the rules in the policy so that it
|
|
* the compile could be used on another kernel unchanged??
|
|
* Current caching doesn't support this but in the future maybe
|
|
*/
|
|
if (!features_supports_ptrace) {
|
|
warn_once(prof.name);
|
|
return RULE_NOT_SUPPORTED;
|
|
}
|
|
|
|
/* always generate a label and ptrace entry */
|
|
buffer << "(" << "\\x" << std::setfill('0') << std::setw(2) << std::hex << AA_CLASS_LABEL << "|)";
|
|
|
|
buffer << "\\x" << std::setfill('0') << std::setw(2) << std::hex << AA_CLASS_PTRACE;
|
|
|
|
if (peer_label) {
|
|
ptype = convert_aaregex_to_pcre(peer_label, 0, glob_default, buf, &pos);
|
|
if (ptype == ePatternInvalid)
|
|
goto fail;
|
|
buffer << buf;
|
|
} else {
|
|
buffer << anyone_match_pattern;
|
|
}
|
|
|
|
buf = buffer.str();
|
|
if (perms & AA_VALID_PTRACE_PERMS) {
|
|
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0,
|
|
parseopts))
|
|
goto fail;
|
|
}
|
|
|
|
return RULE_OK;
|
|
|
|
fail:
|
|
return RULE_ERROR;
|
|
}
|
|
|