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Fix bugs and add security features to redbean

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- Fix a regression with the previous change that broke redbean
- Add chroot(), resource limit, seccomp, and other stuff to redbean
- Write lots and lots of documentation
- Iron out more system call issues
This commit is contained in:
Justine Tunney 2022-04-18 00:01:26 -07:00
parent f1dfa4bdfa
commit 7166679620
182 changed files with 1855 additions and 918 deletions
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72
test/libc/calls/seccomp_test.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/iovec.h"
#include "libc/intrin/kprintf.h"
#include "libc/runtime/runtime.h"
#include "libc/sock/sock.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/pr.h"
#include "libc/sysv/consts/seccomp.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/testlib.h"
bool __is_linux_2_6_23(void) {
if (!IsLinux()) return false;
return prctl(PR_GET_SECCOMP) != -1; // errno should be EINVAL
}
void SetUp(void) {
if (!__is_linux_2_6_23()) {
exit(0);
}
}
TEST(seccompStrictMode, evilProcess_getsKill9d) {
int ws, pid;
ASSERT_NE(-1, (pid = fork()));
if (!pid) {
EXPECT_EQ(0, seccomp(SECCOMP_SET_MODE_STRICT, 0, 0));
open("/etc/passwd", O_RDWR);
_Exit1(127);
}
EXPECT_NE(-1, wait(&ws));
EXPECT_TRUE(WIFSIGNALED(ws));
EXPECT_EQ(SIGKILL, WTERMSIG(ws));
}
TEST(seccompStrictMode, goodProcess_isAuthorized) {
int ws, pid;
int pfds[2];
char buf[3] = {0};
ASSERT_SYS(0, 0, pipe(pfds));
ASSERT_NE(-1, (pid = fork()));
if (!pid) {
EXPECT_EQ(0, seccomp(SECCOMP_SET_MODE_STRICT, 0, 0));
write(pfds[1], "hi", 3);
_Exit1(0);
}
EXPECT_SYS(0, 0, close(pfds[1]));
EXPECT_SYS(0, 3, read(pfds[0], buf, 3));
EXPECT_SYS(0, 0, close(pfds[0]));
EXPECT_NE(-1, wait(&ws));
EXPECT_TRUE(WIFEXITED(ws));
EXPECT_EQ(0, WEXITSTATUS(ws));
EXPECT_STREQ("hi", buf);
}