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/*
* (C) 2019 David Carlier <devnexen@gmail.com>
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "sandbox.h"
#include <botan/mem_ops.h>
#if defined(BOTAN_TARGET_OS_HAS_PLEDGE)
#include <unistd.h>
#elif defined(BOTAN_TARGET_OS_HAS_CAP_ENTER)
#include <sys/capsicum.h>
#include <unistd.h>
#elif defined(BOTAN_TARGET_OS_HAS_SETPPRIV)
#include <priv.h>
#endif
namespace Botan_CLI {
#if defined(BOTAN_TARGET_OS_HAS_SETPPRIV)
struct SandboxPrivDelete {
void operator()(priv_set_t *ps)
{
::priv_emptyset(ps);
::priv_freeset(ps);
}
};
#endif
Sandbox::Sandbox()
{
#if defined(BOTAN_TARGET_OS_HAS_PLEDGE)
m_name = "pledge";
#elif defined(BOTAN_TARGET_OS_HAS_CAP_ENTER)
m_name = "capsicum";
#elif defined(BOTAN_TARGET_OS_HAS_SETPPRIV)
m_name = "privilege";
#else
m_name = "<none>";
#endif
}
bool Sandbox::init()
{
Botan::initialize_allocator();
#if defined(BOTAN_TARGET_OS_HAS_PLEDGE)
const static char *opts = "stdio rpath inet error";
return (::pledge(opts, nullptr) == 0);
#elif defined(BOTAN_TARGET_OS_HAS_CAP_ENTER)
cap_rights_t wt, rd;
if (::cap_rights_init(&wt, CAP_READ, CAP_WRITE) == nullptr)
{
return false;
}
if (::cap_rights_init(&rd, CAP_FCNTL, CAP_EVENT, CAP_READ) == nullptr)
{
return false;
}
if (::cap_rights_limit(STDOUT_FILENO, &wt) == -1)
{
return false;
}
if (::cap_rights_limit(STDERR_FILENO, &wt) == -1)
{
return false;
}
if (::cap_rights_limit(STDIN_FILENO, &rd) == -1)
{
return false;
}
return (::cap_enter() == 0);
#elif defined(BOTAN_TARGET_OS_HAS_SETPPRIV)
priv_set_t *tmp;
std::unique_ptr<priv_set_t, SandboxPrivDelete> ps;
const char *const priv_perms[] = {
PRIV_PROC_FORK,
PRIV_PROC_EXEC,
PRIV_PROC_INFO,
PRIV_PROC_SESSION,
};
if ((tmp = ::priv_allocset()) == nullptr)
{
return false;
}
ps = std::unique_ptr<priv_set_t, SandboxPrivDelete>(tmp);
::priv_basicset(ps.get());
for (auto perm: priv_perms)
{
if (::priv_delset(ps.get(), perm) == -1)
{
return false;
}
}
return true;
#else
return true;
#endif
}
Sandbox::~Sandbox()
{
}
}