[331] | 1 | /*
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| 2 | * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include "internal/cryptlib.h"
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| 11 |
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| 12 | #if !defined(OPENSSL_NO_STDIO)
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| 13 |
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| 14 | # include <stdio.h>
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| 15 |
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| 16 | FILE *openssl_fopen(const char *filename, const char *mode)
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| 17 | {
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| 18 | FILE *file = NULL;
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| 19 | # if defined(_WIN32) && defined(CP_UTF8)
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| 20 | int sz, len_0 = (int)strlen(filename) + 1;
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| 21 | DWORD flags;
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| 22 |
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| 23 | /*
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| 24 | * Basically there are three cases to cover: a) filename is
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| 25 | * pure ASCII string; b) actual UTF-8 encoded string and
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| 26 | * c) locale-ized string, i.e. one containing 8-bit
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| 27 | * characters that are meaningful in current system locale.
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| 28 | * If filename is pure ASCII or real UTF-8 encoded string,
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| 29 | * MultiByteToWideChar succeeds and _wfopen works. If
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| 30 | * filename is locale-ized string, chances are that
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| 31 | * MultiByteToWideChar fails reporting
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| 32 | * ERROR_NO_UNICODE_TRANSLATION, in which case we fall
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| 33 | * back to fopen...
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| 34 | */
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| 35 | if ((sz = MultiByteToWideChar(CP_UTF8, (flags = MB_ERR_INVALID_CHARS),
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| 36 | filename, len_0, NULL, 0)) > 0 ||
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| 37 | (GetLastError() == ERROR_INVALID_FLAGS &&
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| 38 | (sz = MultiByteToWideChar(CP_UTF8, (flags = 0),
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| 39 | filename, len_0, NULL, 0)) > 0)
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| 40 | ) {
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| 41 | WCHAR wmode[8];
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| 42 | WCHAR *wfilename = _alloca(sz * sizeof(WCHAR));
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| 43 |
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| 44 | if (MultiByteToWideChar(CP_UTF8, flags,
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| 45 | filename, len_0, wfilename, sz) &&
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| 46 | MultiByteToWideChar(CP_UTF8, 0, mode, strlen(mode) + 1,
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| 47 | wmode, OSSL_NELEM(wmode)) &&
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| 48 | (file = _wfopen(wfilename, wmode)) == NULL &&
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| 49 | (errno == ENOENT || errno == EBADF)
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| 50 | ) {
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| 51 | /*
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| 52 | * UTF-8 decode succeeded, but no file, filename
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| 53 | * could still have been locale-ized...
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| 54 | */
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| 55 | file = fopen(filename, mode);
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| 56 | }
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| 57 | } else if (GetLastError() == ERROR_NO_UNICODE_TRANSLATION) {
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| 58 | file = fopen(filename, mode);
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| 59 | }
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| 60 | # elif defined(__DJGPP__)
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| 61 | {
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| 62 | char *newname = NULL;
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| 63 |
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| 64 | if (!HAS_LFN_SUPPORT(filename)) {
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| 65 | char *iterator;
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| 66 | char lastchar;
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| 67 |
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| 68 | newname = OPENSSL_malloc(strlen(filename) + 1);
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| 69 | if (newname == NULL)
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| 70 | return NULL;
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| 71 |
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| 72 | for (iterator = newname, lastchar = '\0';
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| 73 | *filename; filename++, iterator++) {
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| 74 | if (lastchar == '/' && filename[0] == '.'
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| 75 | && filename[1] != '.' && filename[1] != '/') {
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| 76 | /* Leading dots are not permitted in plain DOS. */
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| 77 | *iterator = '_';
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| 78 | } else {
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| 79 | *iterator = *filename;
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| 80 | }
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| 81 | lastchar = *filename;
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| 82 | }
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| 83 | *iterator = '\0';
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| 84 | filename = newname;
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| 85 | }
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| 86 | file = fopen(filename, mode);
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| 87 |
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| 88 | OPENSSL_free(newname);
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| 89 | }
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| 90 | # else
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| 91 | file = fopen(filename, mode);
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| 92 | # endif
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| 93 | return file;
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| 94 | }
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| 95 |
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| 96 | #else
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| 97 |
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| 98 | void *openssl_fopen(const char *filename, const char *mode)
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| 99 | {
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| 100 | return NULL;
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| 101 | }
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| 102 |
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| 103 | #endif
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