1 /*
2 * Copyright 1995-2020 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 #ifndef OSSL_E_OS_H
11 # define OSSL_E_OS_H
12
13 # include <limits.h>
14 # include <openssl/opensslconf.h>
15
16 # include <openssl/e_os2.h>
17 # include <openssl/crypto.h>
18 # include "internal/nelem.h"
19
20 /*
21 * <openssl/e_os2.h> contains what we can justify to make visible to the
22 * outside; this file e_os.h is not part of the exported interface.
23 */
24
25 # ifndef DEVRANDOM
26 /*
27 * set this to a comma-separated list of 'random' device files to try out. By
28 * default, we will try to read at least one of these files
29 */
30 # define DEVRANDOM "/dev/urandom", "/dev/random", "/dev/hwrng", "/dev/srandom"
31 # if defined(__linux) && !defined(__ANDROID__)
32 # ifndef DEVRANDOM_WAIT
33 # define DEVRANDOM_WAIT "/dev/random"
34 # endif
35 /*
36 * Linux kernels 4.8 and later changes how their random device works and there
37 * is no reliable way to tell that /dev/urandom has been seeded -- getentropy(2)
38 * should be used instead.
39 */
40 # ifndef DEVRANDOM_SAFE_KERNEL
41 # define DEVRANDOM_SAFE_KERNEL 4, 8
42 # endif
43 /*
44 * Some operating systems do not permit select(2) on their random devices,
45 * defining this to zero will force the use of read(2) to extract one byte
46 * from /dev/random.
47 */
48 # ifndef DEVRANDM_WAIT_USE_SELECT
49 # define DEVRANDM_WAIT_USE_SELECT 1
50 # endif
51 /*
52 * Define the shared memory identifier used to indicate if the operating
53 * system has properly seeded the DEVRANDOM source.
54 */
55 # ifndef OPENSSL_RAND_SEED_DEVRANDOM_SHM_ID
56 # define OPENSSL_RAND_SEED_DEVRANDOM_SHM_ID 114
57 # endif
58
59 # endif
60 # endif
61 # if !defined(OPENSSL_NO_EGD) && !defined(DEVRANDOM_EGD)
62 /*
63 * set this to a comma-separated list of 'egd' sockets to try out. These
64 * sockets will be tried in the order listed in case accessing the device
65 * files listed in DEVRANDOM did not return enough randomness.
66 */
67 # define DEVRANDOM_EGD "/var/run/egd-pool", "/dev/egd-pool", "/etc/egd-pool", "/etc/entropy"
68 # endif
69
70 # if defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_UEFI)
71 # define NO_CHMOD
72 # define NO_SYSLOG
73 # endif
74
75 # define get_last_sys_error() errno
76 # define clear_sys_error() errno=0
77 # define set_sys_error(e) errno=(e)
78
79 /********************************************************************
80 The Microsoft section
81 ********************************************************************/
82 # if defined(OPENSSL_SYS_WIN32) && !defined(WIN32)
83 # define WIN32
84 # endif
85 # if defined(OPENSSL_SYS_WINDOWS) && !defined(WINDOWS)
86 # define WINDOWS
87 # endif
88 # if defined(OPENSSL_SYS_MSDOS) && !defined(MSDOS)
89 # define MSDOS
90 # endif
91
92 # ifdef WIN32
93 # undef get_last_sys_error
94 # undef clear_sys_error
95 # undef set_sys_error
96 # define get_last_sys_error() GetLastError()
97 # define clear_sys_error() SetLastError(0)
98 # define set_sys_error(e) SetLastError(e)
99 # if !defined(WINNT)
100 # define WIN_CONSOLE_BUG
101 # endif
102 # else
103 # endif
104
105 # if (defined(WINDOWS) || defined(MSDOS))
106
107 # ifdef __DJGPP__
108 # include <unistd.h>
109 # include <sys/stat.h>
110 # define _setmode setmode
111 # define _O_TEXT O_TEXT
112 # define _O_BINARY O_BINARY
113 # define HAS_LFN_SUPPORT(name) (pathconf((name), _PC_NAME_MAX) > 12)
114 # undef DEVRANDOM_EGD /* Neither MS-DOS nor FreeDOS provide 'egd' sockets. */
115 # undef DEVRANDOM
116 # define DEVRANDOM "/dev/urandom\x24"
117 # endif /* __DJGPP__ */
118
119 # ifndef S_IFDIR
120 # define S_IFDIR _S_IFDIR
121 # endif
122
123 # ifndef S_IFMT
124 # define S_IFMT _S_IFMT
125 # endif
126
127 # if !defined(WINNT) && !defined(__DJGPP__)
128 # define NO_SYSLOG
129 # endif
130
131 # ifdef WINDOWS
132 # if !defined(_WIN32_WCE) && !defined(_WIN32_WINNT)
133 /*
134 * Defining _WIN32_WINNT here in e_os.h implies certain "discipline."
135 * Most notably we ought to check for availability of each specific
136 * routine that was introduced after denoted _WIN32_WINNT with
137 * GetProcAddress(). Normally newer functions are masked with higher
138 * _WIN32_WINNT in SDK headers. So that if you wish to use them in
139 * some module, you'd need to override _WIN32_WINNT definition in
140 * the target module in order to "reach for" prototypes, but replace
141 * calls to new functions with indirect calls. Alternatively it
142 * might be possible to achieve the goal by /DELAYLOAD-ing .DLLs
143 * and check for current OS version instead.
144 */
145 # define _WIN32_WINNT 0x0501
146 # endif
147 # if defined(_WIN32_WINNT) || defined(_WIN32_WCE)
148 /*
149 * Just like defining _WIN32_WINNT including winsock2.h implies
150 * certain "discipline" for maintaining [broad] binary compatibility.
151 * As long as structures are invariant among Winsock versions,
152 * it's sufficient to check for specific Winsock2 API availability
153 * at run-time [DSO_global_lookup is recommended]...
154 */
155 # include <winsock2.h>
156 # include <ws2tcpip.h>
157 /* yes, they have to be #included prior to <windows.h> */
158 # endif
159 # include <windows.h>
160 # include <stdio.h>
161 # include <stddef.h>
162 # include <errno.h>
163 # if defined(_WIN32_WCE) && !defined(EACCES)
164 # define EACCES 13
165 # endif
166 # include <string.h>
167 # ifdef _WIN64
168 # define strlen(s) _strlen31(s)
169 /* cut strings to 2GB */
_strlen31(const char * str)170 static __inline unsigned int _strlen31(const char *str)
171 {
172 unsigned int len = 0;
173 while (*str && len < 0x80000000U)
174 str++, len++;
175 return len & 0x7FFFFFFF;
176 }
177 # endif
178 # include <malloc.h>
179 # if defined(_MSC_VER) && !defined(_WIN32_WCE) && !defined(_DLL) && defined(stdin)
180 # if _MSC_VER>=1300 && _MSC_VER<1600
181 # undef stdin
182 # undef stdout
183 # undef stderr
184 FILE *__iob_func();
185 # define stdin (&__iob_func()[0])
186 # define stdout (&__iob_func()[1])
187 # define stderr (&__iob_func()[2])
188 # elif _MSC_VER<1300 && defined(I_CAN_LIVE_WITH_LNK4049)
189 # undef stdin
190 # undef stdout
191 # undef stderr
192 /*
193 * pre-1300 has __p__iob(), but it's available only in msvcrt.lib,
194 * or in other words with /MD. Declaring implicit import, i.e. with
195 * _imp_ prefix, works correctly with all compiler options, but
196 * without /MD results in LINK warning LNK4049: 'locally defined
197 * symbol "__iob" imported'.
198 */
199 extern FILE *_imp___iob;
200 # define stdin (&_imp___iob[0])
201 # define stdout (&_imp___iob[1])
202 # define stderr (&_imp___iob[2])
203 # endif
204 # endif
205 # endif
206 # include <io.h>
207 # include <fcntl.h>
208
209 # ifdef OPENSSL_SYS_WINCE
210 # define OPENSSL_NO_POSIX_IO
211 # endif
212
213 # define EXIT(n) exit(n)
214 # define LIST_SEPARATOR_CHAR ';'
215 # ifndef W_OK
216 # define W_OK 2
217 # endif
218 # ifndef R_OK
219 # define R_OK 4
220 # endif
221 # ifdef OPENSSL_SYS_WINCE
222 # define DEFAULT_HOME ""
223 # else
224 # define DEFAULT_HOME "C:"
225 # endif
226
227 /* Avoid Visual Studio 13 GetVersion deprecated problems */
228 # if defined(_MSC_VER) && _MSC_VER>=1800
229 # define check_winnt() (1)
230 # define check_win_minplat(x) (1)
231 # else
232 # define check_winnt() (GetVersion() < 0x80000000)
233 # define check_win_minplat(x) (LOBYTE(LOWORD(GetVersion())) >= (x))
234 # endif
235
236 # else /* The non-microsoft world */
237
238 # if defined(OPENSSL_SYS_VXWORKS)
239 # include <sys/times.h>
240 # else
241 # include <sys/time.h>
242 # endif
243
244 # ifdef OPENSSL_SYS_VMS
245 # define VMS 1
246 /*
247 * some programs don't include stdlib, so exit() and others give implicit
248 * function warnings
249 */
250 # include <stdlib.h>
251 # if defined(__DECC)
252 # include <unistd.h>
253 # else
254 # include <unixlib.h>
255 # endif
256 # define LIST_SEPARATOR_CHAR ','
257 /* We don't have any well-defined random devices on VMS, yet... */
258 # undef DEVRANDOM
259 /*-
260 We need to do this since VMS has the following coding on status codes:
261
262 Bits 0-2: status type: 0 = warning, 1 = success, 2 = error, 3 = info ...
263 The important thing to know is that odd numbers are considered
264 good, while even ones are considered errors.
265 Bits 3-15: actual status number
266 Bits 16-27: facility number. 0 is considered "unknown"
267 Bits 28-31: control bits. If bit 28 is set, the shell won't try to
268 output the message (which, for random codes, just looks ugly)
269
270 So, what we do here is to change 0 to 1 to get the default success status,
271 and everything else is shifted up to fit into the status number field, and
272 the status is tagged as an error, which is what is wanted here.
273
274 Finally, we add the VMS C facility code 0x35a000, because there are some
275 programs, such as Perl, that will reinterpret the code back to something
276 POSIX. 'man perlvms' explains it further.
277
278 NOTE: the perlvms manual wants to turn all codes 2 to 255 into success
279 codes (status type = 1). I couldn't disagree more. Fortunately, the
280 status type doesn't seem to bother Perl.
281 -- Richard Levitte
282 */
283 # define EXIT(n) exit((n) ? (((n) << 3) | 2 | 0x10000000 | 0x35a000) : 1)
284
285 # define DEFAULT_HOME "SYS$LOGIN:"
286
287 # else
288 /* !defined VMS */
289 # ifdef OPENSSL_UNISTD
290 # include OPENSSL_UNISTD
291 # else
292 # include <unistd.h>
293 # endif
294 # include <sys/types.h>
295 # ifdef OPENSSL_SYS_WIN32_CYGWIN
296 # include <io.h>
297 # include <fcntl.h>
298 # endif
299
300 # define LIST_SEPARATOR_CHAR ':'
301 # define EXIT(n) exit(n)
302 # endif
303
304 # endif
305
306 /***********************************************/
307
308 # if defined(OPENSSL_SYS_WINDOWS)
309 # define strcasecmp _stricmp
310 # define strncasecmp _strnicmp
311 # if (_MSC_VER >= 1310) && !defined(_WIN32_WCE)
312 # define open _open
313 # define fdopen _fdopen
314 # define close _close
315 # ifndef strdup
316 # define strdup _strdup
317 # endif
318 # define unlink _unlink
319 # define fileno _fileno
320 # endif
321 # else
322 # include <strings.h>
323 # endif
324
325 /* vxworks */
326 # if defined(OPENSSL_SYS_VXWORKS)
327 # include <ioLib.h>
328 # include <tickLib.h>
329 # include <sysLib.h>
330 # include <vxWorks.h>
331 # include <sockLib.h>
332 # include <taskLib.h>
333
334 # define TTY_STRUCT int
335 # define sleep(a) taskDelay((a) * sysClkRateGet())
336
337 /*
338 * NOTE: these are implemented by helpers in database app! if the database is
339 * not linked, we need to implement them elsewhere
340 */
341 struct hostent *gethostbyname(const char *name);
342 struct hostent *gethostbyaddr(const char *addr, int length, int type);
343 struct servent *getservbyname(const char *name, const char *proto);
344
345 # endif
346 /* end vxworks */
347
348 # ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
349 # define CRYPTO_memcmp memcmp
350 # endif
351
352 /* unistd.h defines _POSIX_VERSION */
353 # if !defined(OPENSSL_NO_SECURE_MEMORY) && defined(OPENSSL_SYS_UNIX) \
354 && ( (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L) \
355 || defined(__sun) || defined(__hpux) || defined(__sgi) \
356 || defined(__osf__) )
357 # define OPENSSL_SECURE_MEMORY /* secure memory is implemented */
358 # endif
359 #endif
360