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/*!A cross-platform build utility based on Lua
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright (C) 2015-present, Xmake Open Source Community.
*
* @author ruki
* @file file_signature.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "file_signature"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
#include <windows.h>
#include <wintrust.h>
#include <softpub.h>
#include <wincrypt.h>
/* //////////////////////////////////////////////////////////////////////////////////////
* types
*/
// the file signature info type
typedef struct __tb_file_signature_info_t {
// is the file digitally signed?
tb_bool_t is_signed;
// is the signature valid and trusted by the OS?
tb_bool_t is_trusted;
/* the name of the signer (e.g., "Microsoft Corporation")
tbox uses UTF-8 by default for tb_char_t
*/
tb_char_t signer_name[256];
} tb_file_signature_info_t;
/* //////////////////////////////////////////////////////////////////////////////////////
* private implementation
*/
static tb_bool_t tb_file_get_signature_info(tb_char_t const* filepath, tb_file_signature_info_t* info) {
tb_assert_and_check_return_val(filepath && info, tb_false);
// init info
tb_memset(info, 0, sizeof(tb_file_signature_info_t));
// convert path
tb_wchar_t wide_path[TB_PATH_MAXN];
if (!tb_path_absolute_w(filepath, wide_path, TB_PATH_MAXN)) {
return tb_false;
}
// init file info
WINTRUST_FILE_INFO file_data = {0};
file_data.cbStruct = sizeof(file_data);
file_data.pcwszFilePath = wide_path;
file_data.hFile = NULL;
file_data.pgKnownSubject = NULL;
// init trust data
WINTRUST_DATA trust_data = {0};
trust_data.cbStruct = sizeof(trust_data);
trust_data.dwUIChoice = WTD_UI_NONE;
trust_data.fdwRevocationChecks = WTD_REVOKE_WHOLECHAIN;
trust_data.dwUnionChoice = WTD_CHOICE_FILE;
trust_data.dwStateAction = WTD_STATEACTION_VERIFY;
trust_data.hWVTStateData = NULL;
trust_data.pwszURLReference = NULL;
trust_data.dwProvFlags = WTD_SAFER_FLAG;
trust_data.dwUIContext = 0;
trust_data.pFile = &file_data;
// verify trust
GUID guid_action = WINTRUST_ACTION_GENERIC_VERIFY_V2;
LONG status = WinVerifyTrust(NULL, &guid_action, &trust_data);
// clean up
trust_data.dwStateAction = WTD_STATEACTION_CLOSE;
WinVerifyTrust(NULL, &guid_action, &trust_data);
// check status
if (status == ERROR_SUCCESS) {
info->is_signed = tb_true;
info->is_trusted = tb_true;
} else if (status == TRUST_E_NOSIGNATURE) {
return tb_true;
} else if (status == TRUST_E_EXPLICIT_DISTRUST || status == TRUST_E_SUBJECT_NOT_TRUSTED) {
info->is_signed = tb_true;
info->is_trusted = tb_false;
} else {
return tb_false;
}
// extract signer name
if (info->is_signed) {
HCERTSTORE hStore = NULL;
HCRYPTMSG hMsg = NULL;
DWORD dwEncoding = 0;
DWORD dwContentType = 0;
DWORD dwFormatType = 0;
PCMSG_SIGNER_INFO pSignerInfo = NULL;
PCCERT_CONTEXT pCertContext = NULL;
BOOL bResult = FALSE;
bResult = CryptQueryObject(CERT_QUERY_OBJECT_FILE,
wide_path,
CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
CERT_QUERY_FORMAT_FLAG_BINARY,
0,
&dwEncoding,
&dwContentType,
&dwFormatType,
&hStore,
&hMsg,
NULL);
if (bResult) {
DWORD cbSignerInfo = 0;
if (CryptMsgGetParam(hMsg, CMSG_SIGNER_INFO_PARAM, 0, NULL, &cbSignerInfo)) {
pSignerInfo = (PCMSG_SIGNER_INFO)tb_malloc(cbSignerInfo);
if (pSignerInfo) {
if (CryptMsgGetParam(hMsg, CMSG_SIGNER_INFO_PARAM, 0, (void*)pSignerInfo, &cbSignerInfo)) {
CERT_INFO certInfo;
certInfo.Issuer = pSignerInfo->Issuer;
certInfo.SerialNumber = pSignerInfo->SerialNumber;
pCertContext = CertFindCertificateInStore(hStore,
(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING),
0,
CERT_FIND_SUBJECT_CERT,
(PVOID)&certInfo,
NULL);
if (pCertContext) {
tb_wchar_t wName[256] = {0};
if (CertGetNameStringW(pCertContext,
CERT_NAME_SIMPLE_DISPLAY_TYPE,
0,
NULL,
wName,
256)) {
tb_wtoa(info->signer_name, wName, sizeof(info->signer_name));
}
CertFreeCertificateContext(pCertContext);
}
}
tb_free(pSignerInfo);
}
}
}
if (hStore) CertCloseStore(hStore, 0);
if (hMsg) CryptMsgClose(hMsg);
}
return tb_true;
}
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
/* get the file signature info
*
* local info = winos.file_signature(filepath)
* {
* is_signed = true,
* is_trusted = true,
* signer_name = "Microsoft Corporation"
* }
*/
tb_int_t xm_winos_file_signature(lua_State *lua) {
tb_assert_and_check_return_val(lua, 0);
// get the arguments
tb_char_t const *filepath = luaL_checkstring(lua, 1);
tb_check_return_val(filepath, 0);
// get signature info
tb_file_signature_info_t info = {0};
if (tb_file_get_signature_info(filepath, &info)) {
lua_newtable(lua);
lua_pushstring(lua, "is_signed");
lua_pushboolean(lua, info.is_signed);
lua_settable(lua, -3);
lua_pushstring(lua, "is_trusted");
lua_pushboolean(lua, info.is_trusted);
lua_settable(lua, -3);
if (info.is_signed) {
lua_pushstring(lua, "signer_name");
lua_pushstring(lua, info.signer_name);
lua_settable(lua, -3);
}
return 1;
}
return 0;
}
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