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Userland: Make su require passwords

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Peter Elliott 2020-07-25 18:36:32 -06:00 • committed by Andreas Kling
parent 207fb054e5
commit 99ddbb83e8
3 changed files with 27 additions and 14 deletions
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20
Userland/su.cpp
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@ -25,6 +25,7 @@
*/
#include <AK/Vector.h>
#include <LibCore/GetPassword.h>
#include <alloca.h>
#include <grp.h>
#include <pwd.h>
@ -38,9 +39,6 @@ int main(int argc, char** argv)
{
if (geteuid() != 0) {
fprintf(stderr, "Not running as root :(\n");
} else if (getuid() != 0) {
const char* target_user = argc > 1 ? argv[1] : "root";
fprintf(stderr, "Access to account '%s' granted\n", target_user);
}
uid_t uid = 0;
@ -64,6 +62,20 @@ int main(int argc, char** argv)
return 1;
}
if (getuid() != 0 && pwd->pw_passwd[0] != '\0') {
auto password = Core::get_password();
if (password.is_error()) {
fprintf(stderr, strerror(password.error()));
return 1;
}
char* hash = crypt(password.value().characters(), pwd->pw_passwd);
if (hash == NULL || strcmp(hash, pwd->pw_passwd) != 0) {
fprintf(stderr, "Incorrect or disabled password.\n");
return 1;
}
}
Vector<gid_t> extra_gids;
for (auto* group = getgrent(); group; group = getgrent()) {
for (size_t i = 0; group->gr_mem[i]; ++i) {
@ -88,7 +100,7 @@ int main(int argc, char** argv)
perror("setuid");
return 1;
}
rc = execl("/bin/sh", "sh", nullptr);
rc = execl(pwd->pw_shell, pwd->pw_shell, nullptr);
perror("execl");
return 1;
}