1 /*
2  * Copyright (c) 1999-2003 Damien Miller.  All rights reserved.
3  * Copyright (c) 2003 Ben Lindstrom. All rights reserved.
4  * Copyright (c) 2002 Tim Rice.  All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #ifndef _OPENBSD_COMPAT_H
28 #define _OPENBSD_COMPAT_H
29 
30 #include "includes.h"
31 
32 #include <sys/types.h>
33 #include <pwd.h>
34 
35 #include <sys/socket.h>
36 
37 #include <stddef.h>  /* for wchar_t */
38 
39 /* OpenBSD function replacements */
40 #include "base64.h"
41 #include "sigact.h"
42 #include "readpassphrase.h"
43 #include "vis.h"
44 #include "getrrsetbyname.h"
45 #include "sha1.h"
46 #include "sha2.h"
47 #include "rmd160.h"
48 #include "md5.h"
49 #include "blf.h"
50 
51 #ifndef HAVE_BASENAME
52 char *basename(const char *path);
53 #endif
54 
55 #ifndef HAVE_BINDRESVPORT_SA
56 int bindresvport_sa(int sd, struct sockaddr *sa);
57 #endif
58 
59 #ifndef HAVE_CLOSEFROM
60 void closefrom(int);
61 #endif
62 
63 #ifndef HAVE_GETLINE
64 #include <stdio.h>
65 ssize_t getline(char **, size_t *, FILE *);
66 #endif
67 
68 #ifndef HAVE_GETPAGESIZE
69 int getpagesize(void);
70 #endif
71 
72 #ifndef HAVE_GETCWD
73 char *getcwd(char *pt, size_t size);
74 #endif
75 
76 #ifndef HAVE_REALLOCARRAY
77 void *reallocarray(void *, size_t, size_t);
78 #endif
79 
80 #ifndef HAVE_RECALLOCARRAY
81 void *recallocarray(void *, size_t, size_t, size_t);
82 #endif
83 
84 #if !defined(HAVE_REALPATH) || defined(BROKEN_REALPATH)
85 /*
86  * glibc's FORTIFY_SOURCE can redefine this and prevent us picking up the
87  * compat version.
88  */
89 # ifdef BROKEN_REALPATH
90 #  define realpath(x, y) _ssh_compat_realpath(x, y)
91 # endif
92 
93 char *realpath(const char *path, char *resolved);
94 #endif
95 
96 #ifndef HAVE_RRESVPORT_AF
97 int rresvport_af(int *alport, sa_family_t af);
98 #endif
99 
100 #ifndef HAVE_STRLCPY
101 size_t strlcpy(char *dst, const char *src, size_t siz);
102 #endif
103 
104 #ifndef HAVE_STRLCAT
105 size_t strlcat(char *dst, const char *src, size_t siz);
106 #endif
107 
108 #ifndef HAVE_STRCASESTR
109 char *strcasestr(const char *, const char *);
110 #endif
111 
112 #ifndef HAVE_STRNLEN
113 size_t strnlen(const char *, size_t);
114 #endif
115 
116 #ifndef HAVE_STRNDUP
117 char *strndup(const char *s, size_t n);
118 #endif
119 
120 #ifndef HAVE_SETENV
121 int setenv(register const char *name, register const char *value, int rewrite);
122 #endif
123 
124 #ifndef HAVE_STRMODE
125 void strmode(int mode, char *p);
126 #endif
127 
128 #ifndef HAVE_STRPTIME
129 #include  <time.h>
130 char *strptime(const char *buf, const char *fmt, struct tm *tm);
131 #endif
132 
133 #if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP)
134 int mkstemps(char *path, int slen);
135 int mkstemp(char *path);
136 char *mkdtemp(char *path);
137 #endif
138 
139 #ifndef HAVE_DAEMON
140 int daemon(int nochdir, int noclose);
141 #endif
142 
143 #ifndef HAVE_DIRNAME
144 char *dirname(const char *path);
145 #endif
146 
147 #ifndef HAVE_FMT_SCALED
148 #define	FMT_SCALED_STRSIZE	7
149 int	fmt_scaled(long long number, char *result);
150 #endif
151 
152 #ifndef HAVE_SCAN_SCALED
153 int	scan_scaled(char *, long long *);
154 #endif
155 
156 #if defined(BROKEN_INET_NTOA) || !defined(HAVE_INET_NTOA)
157 char *inet_ntoa(struct in_addr in);
158 #endif
159 
160 #ifndef HAVE_INET_NTOP
161 const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
162 #endif
163 
164 #ifndef HAVE_INET_ATON
165 int inet_aton(const char *cp, struct in_addr *addr);
166 #endif
167 
168 #ifndef HAVE_STRSEP
169 char *strsep(char **stringp, const char *delim);
170 #endif
171 
172 #ifndef HAVE_SETPROCTITLE
173 void setproctitle(const char *fmt, ...);
174 void compat_init_setproctitle(int argc, char *argv[]);
175 #endif
176 
177 #ifndef HAVE_GETGROUPLIST
178 int getgrouplist(const char *, gid_t, gid_t *, int *);
179 #endif
180 
181 #if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET)
182 int BSDgetopt(int argc, char * const *argv, const char *opts);
183 #include "openbsd-compat/getopt.h"
184 #endif
185 
186 #if ((defined(HAVE_DECL_READV) && HAVE_DECL_READV == 0) || \
187     (defined(HAVE_DECL_WRITEV) && HAVE_DECL_WRITEV == 0))
188 # include <sys/types.h>
189 # include <sys/uio.h>
190 
191 # if defined(HAVE_DECL_READV) && HAVE_DECL_READV == 0
192 int readv(int, struct iovec *, int);
193 # endif
194 
195 # if defined(HAVE_DECL_WRITEV) && HAVE_DECL_WRITEV == 0
196 int writev(int, struct iovec *, int);
197 # endif
198 #endif
199 
200 /* Home grown routines */
201 #include "bsd-misc.h"
202 #include "bsd-setres_id.h"
203 #include "bsd-signal.h"
204 #include "bsd-statvfs.h"
205 #include "bsd-waitpid.h"
206 #include "bsd-poll.h"
207 
208 #ifndef HAVE_GETPEEREID
209 int getpeereid(int , uid_t *, gid_t *);
210 #endif
211 
212 #ifdef HAVE_ARC4RANDOM
213 # ifndef HAVE_ARC4RANDOM_STIR
214 #  define arc4random_stir()
215 # endif
216 #else
217 unsigned int arc4random(void);
218 void arc4random_stir(void);
219 #endif /* !HAVE_ARC4RANDOM */
220 
221 #ifndef HAVE_ARC4RANDOM_BUF
222 void arc4random_buf(void *, size_t);
223 #endif
224 
225 #ifndef HAVE_ARC4RANDOM_UNIFORM
226 u_int32_t arc4random_uniform(u_int32_t);
227 #endif
228 
229 #ifndef HAVE_ASPRINTF
230 int asprintf(char **, const char *, ...);
231 #endif
232 
233 #ifndef HAVE_OPENPTY
234 # include <sys/ioctl.h>	/* for struct winsize */
235 int openpty(int *, int *, char *, struct termios *, struct winsize *);
236 #endif /* HAVE_OPENPTY */
237 
238 #ifndef HAVE_SNPRINTF
239 int snprintf(char *, size_t, SNPRINTF_CONST char *, ...);
240 #endif
241 
242 #ifndef HAVE_STRTOLL
243 long long strtoll(const char *, char **, int);
244 #endif
245 
246 #ifndef HAVE_STRTOUL
247 unsigned long strtoul(const char *, char **, int);
248 #endif
249 
250 #ifndef HAVE_STRTOULL
251 unsigned long long strtoull(const char *, char **, int);
252 #endif
253 
254 #ifndef HAVE_STRTONUM
255 long long strtonum(const char *, long long, long long, const char **);
256 #endif
257 
258 /* multibyte character support */
259 #ifndef HAVE_MBLEN
260 # define mblen(x, y)	(1)
261 #endif
262 
263 #ifndef HAVE_WCWIDTH
264 # define wcwidth(x)	(((x) >= 0x20 && (x) <= 0x7e) ? 1 : -1)
265 /* force our no-op nl_langinfo and mbtowc */
266 # undef HAVE_NL_LANGINFO
267 # undef HAVE_MBTOWC
268 # undef HAVE_LANGINFO_H
269 #endif
270 
271 #ifndef HAVE_NL_LANGINFO
272 # define nl_langinfo(x)	""
273 #endif
274 
275 #ifndef HAVE_MBTOWC
276 int mbtowc(wchar_t *, const char*, size_t);
277 #endif
278 
279 #if !defined(HAVE_VASPRINTF) || !defined(HAVE_VSNPRINTF)
280 # include <stdarg.h>
281 #endif
282 
283 /*
284  * Some platforms unconditionally undefine va_copy() so we define VA_COPY()
285  * instead.  This is known to be the case on at least some configurations of
286  * AIX with the xlc compiler.
287  */
288 #ifndef VA_COPY
289 # ifdef HAVE_VA_COPY
290 #  define VA_COPY(dest, src) va_copy(dest, src)
291 # else
292 #  ifdef HAVE___VA_COPY
293 #   define VA_COPY(dest, src) __va_copy(dest, src)
294 #  else
295 #   define VA_COPY(dest, src) (dest) = (src)
296 #  endif
297 # endif
298 #endif
299 
300 #ifndef HAVE_VASPRINTF
301 int vasprintf(char **, const char *, va_list);
302 #endif
303 
304 #ifndef HAVE_VSNPRINTF
305 int vsnprintf(char *, size_t, const char *, va_list);
306 #endif
307 
308 #ifndef HAVE_USER_FROM_UID
309 char *user_from_uid(uid_t, int);
310 #endif
311 
312 #ifndef HAVE_GROUP_FROM_GID
313 char *group_from_gid(gid_t, int);
314 #endif
315 
316 #ifndef HAVE_TIMINGSAFE_BCMP
317 int timingsafe_bcmp(const void *, const void *, size_t);
318 #endif
319 
320 #ifndef HAVE_BCRYPT_PBKDF
321 int	bcrypt_pbkdf(const char *, size_t, const u_int8_t *, size_t,
322     u_int8_t *, size_t, unsigned int);
323 #endif
324 
325 #ifndef HAVE_EXPLICIT_BZERO
326 void explicit_bzero(void *p, size_t n);
327 #endif
328 
329 #ifndef HAVE_FREEZERO
330 void freezero(void *, size_t);
331 #endif
332 
333 char *xcrypt(const char *password, const char *salt);
334 char *shadow_pw(struct passwd *pw);
335 
336 /* rfc2553 socket API replacements */
337 #include "fake-rfc2553.h"
338 
339 /* Routines for a single OS platform */
340 #include "bsd-cygwin_util.h"
341 
342 #include "port-aix.h"
343 #include "port-irix.h"
344 #include "port-linux.h"
345 #include "port-solaris.h"
346 #include "port-net.h"
347 #include "port-uw.h"
348 
349 /* _FORTIFY_SOURCE breaks FD_ISSET(n)/FD_SET(n) for n > FD_SETSIZE. Avoid. */
350 #if defined(HAVE_FEATURES_H) && defined(_FORTIFY_SOURCE)
351 # include <features.h>
352 # if defined(__GNU_LIBRARY__) && defined(__GLIBC_PREREQ)
353 #  if __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0)
354 #   include <sys/socket.h>  /* Ensure include guard is defined */
355 #   undef FD_SET
356 #   undef FD_ISSET
357 #   define FD_SET(n, set)	kludge_FD_SET(n, set)
358 #   define FD_ISSET(n, set)	kludge_FD_ISSET(n, set)
359 void kludge_FD_SET(int, fd_set *);
360 int kludge_FD_ISSET(int, fd_set *);
361 #  endif /* __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) */
362 # endif /* __GNU_LIBRARY__ && __GLIBC_PREREQ */
363 #endif /* HAVE_FEATURES_H && _FORTIFY_SOURCE */
364 
365 #endif /* _OPENBSD_COMPAT_H */
366