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