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/*
* Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <openssl/opensslv.h>
#include "internal/thread_once.h"
#include "internal/cryptlib.h"
#include "internal/e_os.h"
#if defined(_WIN32) && defined(OSSL_WINCTX)
# define TOSTR(x) #x
# define MAKESTR(x) TOSTR(x)
# define NOQUOTE(x) x
# if defined(OSSL_WINCTX)
# define REGISTRY_KEY "SOFTWARE\\WOW6432Node\\OpenSSL" "-" MAKESTR(OPENSSL_VERSION_MAJOR) "." MAKESTR(OPENSSL_VERSION_MINOR) "-" MAKESTR(OSSL_WINCTX)
# endif
/**
* @brief The directory where OpenSSL is installed.
*/
static char openssldir[MAX_PATH + 1];
/**
* @brief The pointer to the openssldir buffer
*/
static char *openssldirptr = NULL;
/**
* @brief The directory where OpenSSL engines are located.
*/
static char enginesdir[MAX_PATH + 1];
/**
* @brief The pointer to the enginesdir buffer
*/
static char *enginesdirptr = NULL;
/**
* @brief The directory where OpenSSL modules are located.
*/
static char modulesdir[MAX_PATH + 1];
/**
* @brief The pointer to the modulesdir buffer
*/
static char *modulesdirptr = NULL;
/**
* @brief Get the list of Windows registry directories.
*
* This function retrieves a list of Windows registry directories.
*
* @return A pointer to a char array containing the registry directories.
*/
static char *get_windows_regdirs(char *dst, DWORD dstsizebytes, LPCWSTR valuename)
{
char *retval = NULL;
# ifdef REGISTRY_KEY
DWORD keysizebytes;
DWORD ktype;
HKEY hkey;
LSTATUS ret;
DWORD index = 0;
LPCWSTR tempstr = NULL;
ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
TEXT(REGISTRY_KEY), KEY_WOW64_32KEY,
KEY_QUERY_VALUE, &hkey);
if (ret != ERROR_SUCCESS)
goto out;
/* Always use wide call so we can avoid extra encoding conversions on the output */
ret = RegQueryValueExW(hkey, valuename, NULL, &ktype, NULL,
&keysizebytes);
if (ret != ERROR_SUCCESS)
goto out;
if (ktype != REG_EXPAND_SZ && ktype != REG_SZ)
goto out;
if (keysizebytes > MAX_PATH * sizeof(WCHAR))
goto out;
/*
* RegQueryValueExW does not guarantee the buffer is null terminated,
* so we make space for one in the allocation
*/
tempstr = OPENSSL_zalloc(keysizebytes + sizeof(WCHAR));
if (tempstr == NULL)
goto out;
if (RegQueryValueExW(hkey, valuename,
NULL, &ktype, (LPBYTE)tempstr, &keysizebytes) != ERROR_SUCCESS)
goto out;
if (!WideCharToMultiByte(CP_UTF8, 0, tempstr, -1, dst, dstsizebytes,
NULL, NULL))
goto out;
retval = dst;
out:
OPENSSL_free(tempstr);
RegCloseKey(hkey);
# endif /* REGISTRY_KEY */
return retval;
}
static CRYPTO_ONCE defaults_setup_init = CRYPTO_ONCE_STATIC_INIT;
/**
* @brief Function to setup default values to run once.
* Only used in Windows environments. Does run time initialization
* of openssldir/modulesdir/enginesdir from the registry
*/
DEFINE_RUN_ONCE_STATIC(do_defaults_setup)
{
get_windows_regdirs(openssldir, sizeof(openssldir), L"OPENSSLDIR");
get_windows_regdirs(enginesdir, sizeof(enginesdir), L"ENGINESDIR");
get_windows_regdirs(modulesdir, sizeof(modulesdir), L"MODULESDIR");
/*
* Set our pointers only if the directories are fetched properly
*/
if (strlen(openssldir) > 0)
openssldirptr = openssldir;
if (strlen(enginesdir) > 0)
enginesdirptr = enginesdir;
if (strlen(modulesdir) > 0)
modulesdirptr = modulesdir;
return 1;
}
#endif /* defined(_WIN32) && defined(OSSL_WINCTX) */
/**
* @brief Get the directory where OpenSSL is installed.
*
* @return A pointer to a string containing the OpenSSL directory path.
*/
const char *ossl_get_openssldir(void)
{
#if defined(_WIN32) && defined (OSSL_WINCTX)
if (!RUN_ONCE(&defaults_setup_init, do_defaults_setup))
return NULL;
return (const char *)openssldirptr;
# else
return OPENSSLDIR;
#endif
}
/**
* @brief Get the directory where OpenSSL engines are located.
*
* @return A pointer to a string containing the engines directory path.
*/
const char *ossl_get_enginesdir(void)
{
#if defined(_WIN32) && defined (OSSL_WINCTX)
if (!RUN_ONCE(&defaults_setup_init, do_defaults_setup))
return NULL;
return (const char *)enginesdirptr;
#else
return ENGINESDIR;
#endif
}
/**
* @brief Get the directory where OpenSSL modules are located.
*
* @return A pointer to a string containing the modules directory path.
*/
const char *ossl_get_modulesdir(void)
{
#if defined(_WIN32) && defined(OSSL_WINCTX)
if (!RUN_ONCE(&defaults_setup_init, do_defaults_setup))
return NULL;
return (const char *)modulesdirptr;
#else
return MODULESDIR;
#endif
}
/**
* @brief Get the build time defined windows installer context
*
* @return A char pointer to a string representing the windows install context
*/
const char *ossl_get_wininstallcontext(void)
{
#if defined(_WIN32) && defined (OSSL_WINCTX)
return MAKESTR(OSSL_WINCTX);
#else
return "Undefined";
#endif
}
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