testing/test-cases/amfi-hardened-dlopen-leaf.dtest/main.c

   1 // BOOT_ARGS: dyld_flags=2
   2
   3 // BUILD(macos):  $CC my.c -dynamiclib -o $BUILD_DIR/libmy.dylib -install_name $RUN_DIR/libmy.dylib
   4 // BUILD(macos):  $CC main.c -o $BUILD_DIR/amfi-hardened-dlopen-leaf.exe -DHARDENED=1
   5 // BUILD(macos):  $CC main.c -o $BUILD_DIR/amfi-not-hardened-dlopen-leaf.exe
   6
   7 // BUILD(ios,tvos,watchos,bridgeos):
   8
   9 // RUN:  DYLD_AMFI_FAKE=0x14 ./amfi-hardened-dlopen-leaf.exe
  10 // RUN:  DYLD_AMFI_FAKE=0x3F ./amfi-not-hardened-dlopen-leaf.exe
  11
  12
  13 #include <stdlib.h>
  14 #include <stdbool.h>
  15 #include <stdio.h>
  16 #include <dlfcn.h>
  17 #include <mach/host_info.h>
  18 #include <mach/mach.h>
  19 #include <mach/mach_host.h>
  20
  21 #include "test_support.h"
  22
  23 void tryPath(const char* prog, const char* path)
  24 {
  25     void* handle = dlopen(path, RTLD_LAZY);
  26 #if HARDENED
  27     if ( handle != NULL ) {
  28         FAIL("dlopen(%s) unexpectedly succeeded", path);
  29         exit(0);
  30     }
  31 #else
  32     if ( handle == NULL ) {
  33         FAIL("dlopen(%s) - %s", path, dlerror());
  34         exit(0);
  35     }
  36 #endif
  37
  38 }
  39
  40 int main(int argc, const char* argv[], const char* envp[], const char* apple[]) {
  41     // verify leaf name leads to dylib in /usr/lib/
  42     void* handle = dlopen("libc.dylib", RTLD_LAZY);
  43     if ( handle == NULL ) {
  44         FAIL("dlopen - %s", dlerror());
  45     }
  46
  47     // verify file system relative paths: hardened should fail
  48     tryPath(argv[0], "libmy.dylib");
  49     tryPath(argv[0], "./libmy.dylib");
  50     tryPath(argv[0], "../amfi-hardened-dlopen-leaf/libmy.dylib");
  51     PASS("Succcess");
  52 }
  53
  54
  55