OpenCoverage

o_fopen.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/o_fopen.c
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1/*-
2 * Copyright 2016-2018 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# if defined(__linux) || defined(__sun) || defined(__hpux)-
11/*-
12 * Following definition aliases fopen to fopen64 on above mentioned-
13 * platforms. This makes it possible to open and sequentially access files-
14 * larger than 2GB from 32-bit application. It does not allow to traverse-
15 * them beyond 2GB with fseek/ftell, but on the other hand *no* 32-bit-
16 * platform permits that, not with fseek/ftell. Not to mention that breaking-
17 * 2GB limit for seeking would require surgery to *our* API. But sequential-
18 * access suffices for practical cases when you can run into large files,-
19 * such as fingerprinting, so we can let API alone. For reference, the list-
20 * of 32-bit platforms which allow for sequential access of large files-
21 * without extra "magic" comprise *BSD, Darwin, IRIX...-
22 */-
23# ifndef _FILE_OFFSET_BITS-
24# define _FILE_OFFSET_BITS 64-
25# endif-
26# endif-
27-
28#include "e_os.h"-
29#include "internal/cryptlib.h"-
30-
31#if !defined(OPENSSL_NO_STDIO)-
32-
33# include <stdio.h>-
34# ifdef __DJGPP__-
35# include <unistd.h>-
36# endif-
37-
38FILE *openssl_fopen(const char *filename, const char *mode)-
39{-
40 FILE *file = NULL;-
41# if defined(_WIN32) && defined(CP_UTF8)-
42 int sz, len_0 = (int)strlen(filename) + 1;-
43 DWORD flags;-
44-
45 /*-
46 * Basically there are three cases to cover: a) filename is-
47 * pure ASCII string; b) actual UTF-8 encoded string and-
48 * c) locale-ized string, i.e. one containing 8-bit-
49 * characters that are meaningful in current system locale.-
50 * If filename is pure ASCII or real UTF-8 encoded string,-
51 * MultiByteToWideChar succeeds and _wfopen works. If-
52 * filename is locale-ized string, chances are that-
53 * MultiByteToWideChar fails reporting-
54 * ERROR_NO_UNICODE_TRANSLATION, in which case we fall-
55 * back to fopen...-
56 */-
57 if ((sz = MultiByteToWideChar(CP_UTF8, (flags = MB_ERR_INVALID_CHARS),-
58 filename, len_0, NULL, 0)) > 0 ||-
59 (GetLastError() == ERROR_INVALID_FLAGS &&-
60 (sz = MultiByteToWideChar(CP_UTF8, (flags = 0),-
61 filename, len_0, NULL, 0)) > 0)-
62 ) {-
63 WCHAR wmode[8];-
64 WCHAR *wfilename = _alloca(sz * sizeof(WCHAR));-
65-
66 if (MultiByteToWideChar(CP_UTF8, flags,-
67 filename, len_0, wfilename, sz) &&-
68 MultiByteToWideChar(CP_UTF8, 0, mode, strlen(mode) + 1,-
69 wmode, OSSL_NELEM(wmode)) &&-
70 (file = _wfopen(wfilename, wmode)) == NULL &&-
71 (errno == ENOENT || errno == EBADF)-
72 ) {-
73 /*-
74 * UTF-8 decode succeeded, but no file, filename-
75 * could still have been locale-ized...-
76 */-
77 file = fopen(filename, mode);-
78 }-
79 } else if (GetLastError() == ERROR_NO_UNICODE_TRANSLATION) {-
80 file = fopen(filename, mode);-
81 }-
82# elif defined(__DJGPP__)-
83 {-
84 char *newname = NULL;-
85-
86 if (pathconf(filename, _PC_NAME_MAX) <= 12) { /* 8.3 file system? */-
87 char *iterator;-
88 char lastchar;-
89-
90 if ((newname = OPENSSL_malloc(strlen(filename) + 1)) == NULL) {-
91 CRYPTOerr(CRYPTO_F_OPENSSL_FOPEN, ERR_R_MALLOC_FAILURE);-
92 return NULL;-
93 }-
94-
95 for (iterator = newname, lastchar = '\0';-
96 *filename; filename++, iterator++) {-
97 if (lastchar == '/' && filename[0] == '.'-
98 && filename[1] != '.' && filename[1] != '/') {-
99 /* Leading dots are not permitted in plain DOS. */-
100 *iterator = '_';-
101 } else {-
102 *iterator = *filename;-
103 }-
104 lastchar = *filename;-
105 }-
106 *iterator = '\0';-
107 filename = newname;-
108 }-
109 file = fopen(filename, mode);-
110-
111 OPENSSL_free(newname);-
112 }-
113# else-
114 file = fopen(filename, mode);-
115# endif-
116 return file;
executed 14750 times by 1 test: return file;
Executed by:
  • libcrypto.so.1.1
14750
117}-
118-
119#else-
120-
121void *openssl_fopen(const char *filename, const char *mode)-
122{-
123 return NULL;-
124}-
125-
126#endif-
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