mirror of
https://gitlab.com/apparmor/apparmor.git
synced 2025-03-04 08:24:42 +01:00
fdf5b062a9
This removes the struct wrapper used in the previous patch to ensure that all uses are properly converted. Signed-off-by: John Johansen <john.johansen@canonical.com>
150 lines
3.5 KiB
C++
150 lines
3.5 KiB
C++
/*
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* Copyright (c) 2014
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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 "ptrace.h"
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#include <iomanip>
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#include <string>
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#include <sstream>
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int parse_ptrace_perms(const char *str_perms, perms_t *perms, int fail)
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{
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return parse_X_perms("ptrace", AA_VALID_PTRACE_PERMS, str_perms, perms, fail);
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}
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void ptrace_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 ptrace rules\n");
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if (strcmp(cond_ent->name, "peer") == 0) {
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move_conditional_value("ptrace", &peer_label, cond_ent);
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} else {
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yyerror("invalid ptrace rule 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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ptrace_rule::ptrace_rule(perms_t perms_p, struct cond_entry *conds):
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peer_label(NULL), audit(AUDIT_UNSPECIFIED), deny(0)
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{
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if (perms_p) {
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if (perms_p & ~AA_VALID_PTRACE_PERMS)
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yyerror("perms contains invalid permissions for ptrace\n");
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perms = perms_p;
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} else {
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perms = AA_VALID_PTRACE_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 &ptrace_rule::dump(ostream &os)
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{
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if (audit == AUDIT_FORCE)
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os << "audit ";
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if (deny)
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os << "deny ";
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os << "ptrace";
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if (perms != AA_VALID_PTRACE_PERMS) {
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os << " (";
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if (perms & AA_MAY_READ)
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os << "read ";
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if (perms & AA_MAY_READBY)
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os << "readby ";
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if (perms & AA_MAY_TRACE)
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os << "trace ";
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if (perms & AA_MAY_TRACEDBY)
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os << "tracedby ";
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os << ")";
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}
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if (peer_label)
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os << " " << peer_label;
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os << ",\n";
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return os;
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}
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int ptrace_rule::expand_variables(void)
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{
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return expand_entry_variables(&peer_label);
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}
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void ptrace_rule::warn_once(const char *name)
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{
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rule_t::warn_once(name, "ptrace rules not enforced");
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}
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int ptrace_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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pattern_t ptype;
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int pos;
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/* ?? do we want to generate the rules in the policy so that it
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* the compile could be used on another kernel unchanged??
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* Current caching doesn't support this but in the future maybe
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*/
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if (!features_supports_ptrace) {
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warn_once(prof.name);
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return RULE_NOT_SUPPORTED;
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}
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/* always generate a label and ptrace entry */
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buffer << "(" << "\\x" << std::setfill('0') << std::setw(2) << std::hex << AA_CLASS_LABEL << "|)";
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buffer << "\\x" << std::setfill('0') << std::setw(2) << std::hex << AA_CLASS_PTRACE;
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if (peer_label) {
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ptype = convert_aaregex_to_pcre(peer_label, 0, glob_default, buf, &pos);
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if (ptype == ePatternInvalid)
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goto fail;
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buffer << buf;
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} else {
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buffer << anyone_match_pattern;
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}
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buf = buffer.str();
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if (perms & AA_VALID_PTRACE_PERMS) {
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if (!prof.policy.rules->add_rule(buf.c_str(), deny, perms, 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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