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//
// Copyright 2024 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include <nng/nng.h>
#include <nuts.h>
// Microsoft prefers CamelCase header names, but relies on case-insensitive
// file systems to make that work. The rest of the world (min-gw64 included)
// uses case-sensitive names and lowercase.
#include <accctrl.h>
#include <aclapi.h>
SECURITY_DESCRIPTOR *
sdescAuthUsers(PSID sid, PACL *aclp)
{
SECURITY_DESCRIPTOR *sdesc;
EXPLICIT_ACCESS xa;
ACL *acl;
sdesc = calloc(SECURITY_DESCRIPTOR_MIN_LENGTH, 1);
NUTS_ASSERT(sdesc != NULL);
InitializeSecurityDescriptor(sdesc, SECURITY_DESCRIPTOR_REVISION);
xa.grfAccessPermissions = GENERIC_READ | GENERIC_WRITE;
xa.grfAccessMode = SET_ACCESS;
xa.grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
xa.Trustee.TrusteeForm = TRUSTEE_IS_SID;
xa.Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
xa.Trustee.ptstrName = (LPSTR) sid;
SetEntriesInAcl(1, &xa, NULL, &acl);
*aclp = acl;
SetSecurityDescriptorDacl(sdesc, TRUE, acl, FALSE);
return (sdesc);
}
void
test_ipc_security_descriptor(void)
{
nng_stream_listener *l;
char address[64];
char pipe[64];
SECURITY_DESCRIPTOR *sd;
SID users;
DWORD size;
PACL acl = NULL;
PACL dacl;
PSECURITY_DESCRIPTOR psd;
PACE_HEADER ace;
PSID psid;
PACCESS_ALLOWED_ACE allowed;
nng_aio *aio;
nuts_scratch_addr("ipc", sizeof(address), address);
NUTS_PASS(nng_stream_listener_alloc(&l, address));
size = sizeof(users);
CreateWellKnownSid(WinAuthenticatedUserSid, NULL, &users, &size);
sd = sdescAuthUsers(&users, &acl);
NUTS_ASSERT(sd != NULL);
NUTS_ASSERT(acl != NULL);
NUTS_PASS(nng_aio_alloc(&aio, NULL, NULL));
NUTS_PASS(nng_stream_listener_set_security_descriptor(l, sd));
NUTS_PASS(nng_stream_listener_listen(l));
nng_stream_listener_accept(l, aio);
(void) snprintf(
pipe, sizeof(pipe), "\\\\.\\pipe\\%s", address + strlen("ipc://"));
HANDLE ph = CreateFileA(pipe, READ_CONTROL, 0, NULL, OPEN_EXISTING,
FILE_FLAG_OVERLAPPED, NULL);
nng_aio_wait(aio);
NUTS_PASS(nng_aio_result(aio));
HANDLE pd = (HANDLE) nng_aio_get_output(aio, 0);
NUTS_ASSERT(ph != INVALID_HANDLE_VALUE);
NUTS_ASSERT(pd != INVALID_HANDLE_VALUE);
NUTS_ASSERT(
GetSecurityInfo(ph, SE_KERNEL_OBJECT, DACL_SECURITY_INFORMATION,
NULL, NULL, &dacl, NULL, &psd) == ERROR_SUCCESS);
NUTS_ASSERT(dacl->AceCount == 1);
NUTS_ASSERT(GetAce(dacl, 0, (void **) &ace) == TRUE);
allowed = (PACCESS_ALLOWED_ACE) ace;
psid = (PSID) &allowed->SidStart;
NUTS_ASSERT(IsValidSid(psid));
NUTS_ASSERT(EqualSid(psid, &users) == TRUE);
CloseHandle(pd);
CloseHandle(ph);
free(sd);
LocalFree(acl);
LocalFree(psd);
nng_stream_listener_close(l);
nng_stream_listener_free(l);
}
void
test_ipc_security_descriptor_busy(void)
{
// This test ensures that the descriptor can only be set before
// the listener is started.
nng_stream_listener *l;
char address[64];
SECURITY_DESCRIPTOR *sd;
SID users;
DWORD size;
PACL acl = NULL;
nuts_scratch_addr("ipc", sizeof(address), address);
NUTS_PASS(nng_stream_listener_alloc(&l, address));
size = sizeof(users);
CreateWellKnownSid(WinAuthenticatedUserSid, NULL, &users, &size);
sd = sdescAuthUsers(&users, &acl);
NUTS_ASSERT(sd != NULL);
NUTS_ASSERT(acl != NULL);
NUTS_PASS(nng_stream_listener_listen(l));
NUTS_FAIL(
nng_stream_listener_set_security_descriptor(l, sd), NNG_EBUSY);
free(sd);
nng_stream_listener_close(l);
nng_stream_listener_free(l);
}
void
test_ipc_security_descriptor_bogus(void)
{
nng_stream_listener *l;
char address[64];
nuts_scratch_addr("ipc", sizeof(address), address);
NUTS_PASS(nng_stream_listener_alloc(&l, address));
NUTS_FAIL(
nng_stream_listener_set_security_descriptor(l, NULL), NNG_EINVAL);
nng_stream_listener_close(l);
nng_stream_listener_free(l);
}
NUTS_TESTS = {
{ "ipc security descriptor", test_ipc_security_descriptor },
{ "ipc security descriptor busy", test_ipc_security_descriptor_busy },
{ "ipc security descriptor bogus",
test_ipc_security_descriptor_bogus },
{ NULL, NULL },
};
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