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https://github.com/jart/cosmopolitan.git
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5655c9a4e7
* Add `anet` pledge for `inet` without connect This is useful for configurations where it's desirable to start redbean under these restrictions, but not to allow `connect` socket calls. * Update message on protected/unpledged syscalls for clarity * Update redbean to add reporting for unpledged sigaction Previously it would abort without indicating what signal it failed to install when sigaction is not pledged (although it fails all of them). * Move GetHostIps before processing command line options This allows using unix.pledge as part of the options without affecting retrieving host IP addresses (which requires `connect`). It may still fail under external `pledge` command as expected; in this case IPs would need to be passed manually. * Update tests for pledge anet promise
120 lines
4.5 KiB
C
120 lines
4.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/pledge.internal.h"
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#include "libc/calls/struct/seccomp.h"
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#include "libc/calls/syscall_support-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/promises.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sock/sock.h"
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#include "libc/sysv/consts/af.h"
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#include "libc/sysv/consts/ipproto.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/sysv/consts/sock.h"
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#include "libc/testlib/subprocess.h"
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#include "libc/testlib/testlib.h"
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#ifdef __x86_64__
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void SetUp(void) {
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if (!__is_linux_2_6_23() && !IsOpenbsd()) exit(0);
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}
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TEST(pledge, testSoftError) {
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if (IsOpenbsd()) return;
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SPAWN(fork);
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__pledge_mode = PLEDGE_PENALTY_RETURN_EPERM;
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ASSERT_SYS(0, 0, pledge("stdio", 0));
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ASSERT_SYS(EPERM, -1, socket(AF_INET, SOCK_STREAM, IPPROTO_TCP));
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_Exit(7);
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EXITS(7);
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}
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TEST(pledge, testKillThreadMode) {
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SPAWN(fork);
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__pledge_mode = PLEDGE_PENALTY_KILL_THREAD | PLEDGE_STDERR_LOGGING;
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ASSERT_SYS(0, 0, pledge("stdio", 0));
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socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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TERMS(SIGABRT);
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}
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TEST(pledge, testKillProcessMode) {
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SPAWN(fork);
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__pledge_mode = PLEDGE_PENALTY_KILL_PROCESS | PLEDGE_STDERR_LOGGING;
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ASSERT_SYS(0, 0, pledge("stdio", 0));
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socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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TERMS(SIGABRT);
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}
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TEST(pledge, testLogMessage_inSoftyMode) {
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if (IsOpenbsd()) return;
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int fds[2];
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char msg[256] = {0};
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ASSERT_SYS(0, 0, pipe(fds));
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SPAWN(fork);
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__pledge_mode = PLEDGE_PENALTY_RETURN_EPERM | PLEDGE_STDERR_LOGGING;
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ASSERT_SYS(0, 2, dup2(fds[1], 2));
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ASSERT_SYS(0, 0, pledge("stdio", 0));
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ASSERT_SYS(EPERM, -1, socket(AF_INET, SOCK_STREAM, IPPROTO_TCP));
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EXITS(0);
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close(fds[1]);
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read(fds[0], msg, sizeof(msg));
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close(fds[0]);
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if (IsLinux()) {
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ASSERT_STARTSWITH("error: protected syscall socket", msg);
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}
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}
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TEST(pledge, testLogMessage_onKillProcess) {
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int fds[2];
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char msg[256] = {0};
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ASSERT_SYS(0, 0, pipe(fds));
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SPAWN(fork);
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__pledge_mode = PLEDGE_PENALTY_KILL_THREAD | PLEDGE_STDERR_LOGGING;
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ASSERT_SYS(0, 2, dup2(fds[1], 2));
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ASSERT_SYS(0, 0, pledge("stdio", 0));
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socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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TERMS(SIGABRT);
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close(fds[1]);
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read(fds[0], msg, sizeof(msg));
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close(fds[0]);
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if (IsLinux()) {
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ASSERT_STARTSWITH("error: protected syscall socket", msg);
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}
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}
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TEST(pledge, testDoublePledge_isFine) {
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SPAWN(fork);
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__pledge_mode = PLEDGE_PENALTY_KILL_THREAD;
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ASSERT_SYS(0, 0, pledge("stdio", 0));
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ASSERT_SYS(0, 0, pledge("stdio", 0));
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EXITS(0);
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}
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TEST(pledge, testEmptyPledge_doesntUseTrapping) {
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SPAWN(fork);
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__pledge_mode = PLEDGE_PENALTY_KILL_PROCESS;
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ASSERT_SYS(0, 0, pledge("", 0));
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socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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TERMS(IsOpenbsd() ? SIGABRT : SIGSYS);
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}
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#endif /* __x86_64__ */
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