mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-05-23 13:52:28 +00:00
Justine Tunney
parent
1c6b5c0acd
commit
38c3fa63fe
14 changed files with 646 additions and 352 deletions
22
test/libc/mem/life.c
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22
test/libc/mem/life.c
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/*-*- 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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int main(int argc, char *argv[]) {
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return 42;
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}
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@ -42,8 +42,11 @@ TEST_LIBC_MEM_DIRECTDEPS = \
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LIBC_STR \
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LIBC_STUBS \
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LIBC_SYSV \
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LIBC_THREAD \
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LIBC_SYSV_CALLS \
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LIBC_TESTLIB \
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LIBC_THREAD \
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LIBC_X \
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LIBC_ZIPOS \
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THIRD_PARTY_DLMALLOC \
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THIRD_PARTY_LIBCXX
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@ -58,11 +61,34 @@ o/$(MODE)/test/libc/mem/%.com.dbg: \
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$(TEST_LIBC_MEM_DEPS) \
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o/$(MODE)/test/libc/mem/%.o \
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o/$(MODE)/test/libc/mem/mem.pkg \
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o/$(MODE)/test/libc/mem/life.elf.zip.o \
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$(LIBC_TESTMAIN) \
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$(CRT) \
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$(APE_NO_MODIFY_SELF)
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@$(APELINK)
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o/$(MODE)/test/libc/mem/life.com.dbg: \
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$(LIBC_RUNTIME) \
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o/$(MODE)/test/libc/mem/life.o \
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$(CRT) \
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$(APE)
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@$(APELINK)
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o/$(MODE)/test/libc/mem/life.elf: \
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o/$(MODE)/tool/build/assimilate.com \
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o/$(MODE)/test/libc/mem/life.com
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@$(COMPILE) -ACP -T$@ \
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build/bootstrap/cp.com \
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o/$(MODE)/test/libc/mem/life.com \
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o/$(MODE)/test/libc/mem/life.elf
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@$(COMPILE) -AASSIMILATE -T$@ \
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o/$(MODE)/tool/build/assimilate.com \
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o/$(MODE)/test/libc/mem/life.elf
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o/$(MODE)/test/libc/mem/life.elf.zip.o: \
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ZIPOBJ_FLAGS += \
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-B
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$(TEST_LIBC_MEM_OBJS): \
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DEFAULT_CCFLAGS += \
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-fno-builtin
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198
test/libc/mem/unveil_test.c
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198
test/libc/mem/unveil_test.c
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@ -0,0 +1,198 @@
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/*-*- 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/landlock.h"
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#include "libc/calls/struct/dirent.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/mem/io.h"
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#include "libc/runtime/gc.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/s.h"
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#include "libc/testlib/testlib.h"
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#include "libc/x/x.h"
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STATIC_YOINK("zip_uri_support");
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#define EACCES_OR_ENOENT (IsOpenbsd() ? ENOENT : EACCES)
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#define SPAWN() \
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{ \
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int ws, pid; \
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ASSERT_NE(-1, (pid = fork())); \
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if (!pid) {
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#define EXITS(rc) \
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_Exit(0); \
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} \
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ASSERT_NE(-1, wait(&ws)); \
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ASSERT_TRUE(WIFEXITED(ws)); \
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ASSERT_EQ(rc, WEXITSTATUS(ws)); \
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}
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char testlib_enable_tmp_setup_teardown;
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struct stat st;
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static bool SupportsLandlock(void) {
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int e = errno;
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bool r = landlock_create_ruleset(0, 0, LANDLOCK_CREATE_RULESET_VERSION) >= 0;
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errno = e;
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return r;
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}
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__attribute__((__constructor__)) static void init(void) {
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if (!(IsLinux() && SupportsLandlock()) && !IsOpenbsd()) exit(0);
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}
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void SetUp(void) {
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// make sure zipos maps executable into memory early
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ASSERT_SYS(0, 0, stat("/zip/life.elf", &st));
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}
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int extract(const char *from, const char *to, int mode) {
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int fdin, fdout;
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if ((fdin = open(from, O_RDONLY)) == -1) return -1;
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if ((fdout = creat(to, mode)) == -1) {
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close(fdin);
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return -1;
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}
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if (_copyfd(fdin, fdout, -1) == -1) {
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close(fdout);
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close(fdin);
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return -1;
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}
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return close(fdout) | close(fdin);
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}
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TEST(unveil, api_differences) {
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SPAWN();
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ASSERT_SYS(0, 0, stat("/", &st));
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ASSERT_SYS(0, 0, unveil(".", "rw"));
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if (IsOpenbsd()) {
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// openbsd imposes restrictions immediately
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ASSERT_SYS(ENOENT, -1, open("/", O_RDONLY | O_DIRECTORY));
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} else {
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// restrictions on linux don't go into effect until unveil(0,0)
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ASSERT_SYS(0, 3, open("/", O_RDONLY | O_DIRECTORY));
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ASSERT_SYS(0, 0, close(3));
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}
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ASSERT_SYS(0, 0, unveil(0, 0));
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// error numbers are inconsistent
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ASSERT_SYS(EACCES_OR_ENOENT, -1, open("/", O_RDONLY | O_DIRECTORY));
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// wut
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if (IsLinux()) {
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ASSERT_SYS(0, 3, open("/", O_PATH)); // wut
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ASSERT_SYS(0, 0, stat("/", &st)); // wut
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}
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EXITS(0);
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}
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TEST(unveil, rx_readOnlyPreexistingExecutable_worksFine) {
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SPAWN();
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ASSERT_SYS(0, 0, mkdir("folder", 0755));
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ASSERT_SYS(0, 0, extract("/zip/life.elf", "folder/life.elf", 0755));
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ASSERT_SYS(0, 0, unveil("folder", "rx"));
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ASSERT_SYS(0, 0, unveil(0, 0));
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SPAWN();
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execv("folder/life.elf", (char *[]){"folder/life.elf", 0});
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EXITS(42);
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EXITS(0);
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}
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TEST(unveil, r_noExecutePreexistingExecutable_raisesEacces) {
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SPAWN();
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ASSERT_SYS(0, 0, mkdir("folder", 0755));
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ASSERT_SYS(0, 0, extract("/zip/life.elf", "folder/life.elf", 0755));
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ASSERT_SYS(0, 0, unveil("folder", "r"));
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ASSERT_SYS(0, 0, unveil(0, 0));
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SPAWN();
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ASSERT_SYS(EACCES, -1,
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execv("folder/life.elf", (char *[]){"folder/life.elf", 0}));
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EXITS(0);
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EXITS(0);
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}
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TEST(unveil, rwc_createExecutableFile_isAllowedButCantBeRun) {
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SPAWN();
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ASSERT_SYS(0, 0, mkdir("folder", 0755));
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ASSERT_SYS(0, 0, unveil("folder", "rwc"));
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ASSERT_SYS(0, 0, unveil(0, 0));
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ASSERT_SYS(0, 0, extract("/zip/life.elf", "folder/life.elf", 0755));
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SPAWN();
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ASSERT_SYS(0, 0, stat("folder/life.elf", &st));
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ASSERT_SYS(EACCES, -1,
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execv("folder/life.elf", (char *[]){"folder/life.elf", 0}));
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EXITS(0);
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EXITS(0);
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}
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TEST(unveil, rwcx_createExecutableFile_canAlsoBeRun) {
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SPAWN();
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ASSERT_SYS(0, 0, mkdir("folder", 0755));
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ASSERT_SYS(0, 0, unveil("folder", "rwcx"));
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ASSERT_SYS(0, 0, unveil(0, 0));
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ASSERT_SYS(0, 0, extract("/zip/life.elf", "folder/life.elf", 0755));
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SPAWN();
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ASSERT_SYS(0, 0, stat("folder/life.elf", &st));
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execv("folder/life.elf", (char *[]){"folder/life.elf", 0});
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EXITS(42);
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EXITS(0);
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}
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TEST(unveil, dirfdHacking_doesntWork) {
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SPAWN();
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ASSERT_SYS(0, 0, mkdir("jail", 0755));
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ASSERT_SYS(0, 0, mkdir("garden", 0755));
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ASSERT_SYS(0, 0, touch("garden/secret.txt", 0644));
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ASSERT_SYS(0, 3, open("garden", O_RDONLY | O_DIRECTORY));
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ASSERT_SYS(0, 0, unveil("jail", "rw"));
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ASSERT_SYS(0, 0, unveil(0, 0));
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ASSERT_SYS(EACCES_OR_ENOENT, -1, openat(3, "secret.txt", O_RDONLY));
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EXITS(0);
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}
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TEST(unveil, overlappingDirectories_inconsistentBehavior) {
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SPAWN();
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ASSERT_SYS(0, 0, makedirs("f1/f2", 0755));
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ASSERT_SYS(0, 0, extract("/zip/life.elf", "f1/f2/life.elf", 0755));
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ASSERT_SYS(0, 0, unveil("f1", "x"));
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ASSERT_SYS(0, 0, unveil("f1/f2", "r"));
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ASSERT_SYS(0, 0, unveil(0, 0));
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if (IsOpenbsd()) {
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// OpenBSD favors the most restrictive policy
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SPAWN();
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ASSERT_SYS(0, 0, stat("f1/f2/life.elf", &st));
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ASSERT_SYS(EACCES, -1,
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execv("f1/f2/life.elf", (char *[]){"f1/f2/life.elf", 0}));
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EXITS(0);
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} else {
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// Landlock (Linux) uses the union of policies
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SPAWN();
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ASSERT_SYS(0, 0, stat("f1/f2/life.elf", &st));
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execv("f1/f2/life.elf", (char *[]){"f1/f2/life.elf", 0});
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EXITS(42);
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}
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EXITS(0);
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}
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