mirror of https://github.com/openssl/openssl.git
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/*
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* Copyright 2018-2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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#endif
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#include <stdlib.h>
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#include "internal/cryptlib.h"
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#include "internal/e_os.h"
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char *ossl_safe_getenv(const char *name)
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{
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#if defined(_WIN32) && defined(CP_UTF8) && !defined(_WIN32_WCE)
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if (GetEnvironmentVariableW(L"OPENSSL_WIN32_UTF8", NULL, 0) != 0) {
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char *val = NULL;
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int vallen = 0;
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WCHAR *namew = NULL;
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WCHAR *valw = NULL;
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DWORD envlen = 0;
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DWORD dwFlags = MB_ERR_INVALID_CHARS;
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int rsize, fsize;
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UINT curacp;
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curacp = GetACP();
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/*
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* For the code pages listed below, dwFlags must be set to 0.
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* Otherwise, the function fails with ERROR_INVALID_FLAGS.
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*/
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if (curacp == 50220 || curacp == 50221 || curacp == 50222 ||
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curacp == 50225 || curacp == 50227 || curacp == 50229 ||
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(57002 <= curacp && curacp <=57011) || curacp == 65000 ||
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curacp == 42)
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dwFlags = 0;
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/* query for buffer len */
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rsize = MultiByteToWideChar(curacp, dwFlags, name, -1, NULL, 0);
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/* if name is valid string and can be converted to wide string */
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if (rsize > 0)
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namew = _malloca(rsize * sizeof(WCHAR));
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if (NULL != namew) {
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/* convert name to wide string */
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fsize = MultiByteToWideChar(curacp, dwFlags, name, -1, namew, rsize);
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/* if conversion is ok, then determine value string size in wchars */
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if (fsize > 0)
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envlen = GetEnvironmentVariableW(namew, NULL, 0);
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}
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if (envlen > 0)
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valw = _malloca(envlen * sizeof(WCHAR));
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if (NULL != valw) {
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/* if can get env value as wide string */
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if (GetEnvironmentVariableW(namew, valw, envlen) < envlen) {
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/* determine value string size in utf-8 */
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vallen = WideCharToMultiByte(CP_UTF8, 0, valw, -1, NULL, 0,
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NULL, NULL);
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}
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}
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if (vallen > 0)
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val = OPENSSL_malloc(vallen);
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if (NULL != val) {
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/* convert value string from wide to utf-8 */
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if (WideCharToMultiByte(CP_UTF8, 0, valw, -1, val, vallen,
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NULL, NULL) == 0) {
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OPENSSL_free(val);
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val = NULL;
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}
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}
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if (NULL != namew)
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_freea(namew);
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if (NULL != valw)
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_freea(valw);
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return val;
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}
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#endif
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#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
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# if __GLIBC_PREREQ(2, 17)
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# define SECURE_GETENV
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return secure_getenv(name);
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# endif
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#endif
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#ifndef SECURE_GETENV
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if (OPENSSL_issetugid())
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return NULL;
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return getenv(name);
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#endif
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}
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