1/*
2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 OPENSSL_MACROS_H
11# define OPENSSL_MACROS_H
12# pragma once
13
14#include <openssl/opensslconf.h>
15#include <openssl/opensslv.h>
16
17
18/* Helper macros for CPP string composition */
19# define OPENSSL_MSTR_HELPER(x) #x
20# define OPENSSL_MSTR(x) OPENSSL_MSTR_HELPER(x)
21
22/*
23 * Sometimes OPENSSL_NO_xxx ends up with an empty file and some compilers
24 * don't like that. This will hopefully silence them.
25 */
26# define NON_EMPTY_TRANSLATION_UNIT static void *dummy = &dummy;
27
28/*
29 * Generic deprecation macro
30 *
31 * If OPENSSL_SUPPRESS_DEPRECATED is defined, then OSSL_DEPRECATED and
32 * OSSL_DEPRECATED_FOR become no-ops
33 */
34# ifndef OSSL_DEPRECATED
35# undef OSSL_DEPRECATED_FOR
36# ifndef OPENSSL_SUPPRESS_DEPRECATED
37# if defined(_MSC_VER)
38 /*
39 * MSVC supports __declspec(deprecated) since MSVC 2003 (13.10),
40 * and __declspec(deprecated(message)) since MSVC 2005 (14.00)
41 */
42# if _MSC_VER >= 1400
43# define OSSL_DEPRECATED(since) \
44 __declspec(deprecated("Since OpenSSL " # since))
45# define OSSL_DEPRECATED_FOR(since, message) \
46 __declspec(deprecated("Since OpenSSL " # since ";" message))
47# elif _MSC_VER >= 1310
48# define OSSL_DEPRECATED(since) __declspec(deprecated)
49# define OSSL_DEPRECATED_FOR(since, message) __declspec(deprecated)
50# endif
51# elif defined(__GNUC__)
52 /*
53 * According to GCC documentation, deprecations with message appeared in
54 * GCC 4.5.0
55 */
56# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
57# define OSSL_DEPRECATED(since) \
58 __attribute__((deprecated("Since OpenSSL " # since)))
59# define OSSL_DEPRECATED_FOR(since, message) \
60 __attribute__((deprecated("Since OpenSSL " # since ";" message)))
61# elif __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 0)
62# define OSSL_DEPRECATED(since) __attribute__((deprecated))
63# define OSSL_DEPRECATED_FOR(since, message) __attribute__((deprecated))
64# endif
65# elif defined(__SUNPRO_C)
66# if (__SUNPRO_C >= 0x5130)
67# define OSSL_DEPRECATED(since) __attribute__ ((deprecated))
68# define OSSL_DEPRECATED_FOR(since, message) __attribute__ ((deprecated))
69# endif
70# endif
71# endif
72# endif
73
74/*
75 * Still not defined? Then define no-op macros. This means these macros
76 * are unsuitable for use in a typedef.
77 */
78# ifndef OSSL_DEPRECATED
79# define OSSL_DEPRECATED(since) extern
80# define OSSL_DEPRECATED_FOR(since, message) extern
81# endif
82
83/*
84 * Applications should use -DOPENSSL_API_COMPAT=<version> to suppress the
85 * declarations of functions deprecated in or before <version>. If this is
86 * undefined, the value of the macro OPENSSL_CONFIGURED_API (defined in
87 * <openssl/opensslconf.h>) is the default.
88 *
89 * For any version number up until version 1.1.x, <version> is expected to be
90 * the calculated version number 0xMNNFFPPSL.
91 * For version numbers 3.0 and on, <version> is expected to be a computation
92 * of the major and minor numbers in decimal using this formula:
93 *
94 * MAJOR * 10000 + MINOR * 100
95 *
96 * So version 3.0 becomes 30000, version 3.2 becomes 30200, etc.
97 */
98
99/*
100 * We use the OPENSSL_API_COMPAT value to define API level macros. These
101 * macros are used to enable or disable features at that API version boundary.
102 */
103
104# ifdef OPENSSL_API_LEVEL
105# error "OPENSSL_API_LEVEL must not be defined by application"
106# endif
107
108/*
109 * We figure out what API level was intended by simple numeric comparison.
110 * The lowest old style number we recognise is 0x00908000L, so we take some
111 * safety margin and assume that anything below 0x00900000L is a new style
112 * number. This allows new versions up to and including v943.71.83.
113 */
114# ifdef OPENSSL_API_COMPAT
115# if OPENSSL_API_COMPAT < 0x900000L
116# define OPENSSL_API_LEVEL (OPENSSL_API_COMPAT)
117# else
118# define OPENSSL_API_LEVEL \
119 (((OPENSSL_API_COMPAT >> 28) & 0xF) * 10000 \
120 + ((OPENSSL_API_COMPAT >> 20) & 0xFF) * 100 \
121 + ((OPENSSL_API_COMPAT >> 12) & 0xFF))
122# endif
123# endif
124
125/*
126 * If OPENSSL_API_COMPAT wasn't given, we use default numbers to set
127 * the API compatibility level.
128 */
129# ifndef OPENSSL_API_LEVEL
130# if OPENSSL_CONFIGURED_API > 0
131# define OPENSSL_API_LEVEL (OPENSSL_CONFIGURED_API)
132# else
133# define OPENSSL_API_LEVEL \
134 (OPENSSL_VERSION_MAJOR * 10000 + OPENSSL_VERSION_MINOR * 100)
135# endif
136# endif
137
138# if OPENSSL_API_LEVEL > OPENSSL_CONFIGURED_API
139# error "The requested API level higher than the configured API compatibility level"
140# endif
141
142/*
143 * Check of sane values.
144 */
145/* Can't go higher than the current version. */
146# if OPENSSL_API_LEVEL > (OPENSSL_VERSION_MAJOR * 10000 + OPENSSL_VERSION_MINOR * 100)
147# error "OPENSSL_API_COMPAT expresses an impossible API compatibility level"
148# endif
149/* OpenSSL will have no version 2.y.z */
150# if OPENSSL_API_LEVEL < 30000 && OPENSSL_API_LEVEL >= 20000
151# error "OPENSSL_API_COMPAT expresses an impossible API compatibility level"
152# endif
153/* Below 0.9.8 is unacceptably low */
154# if OPENSSL_API_LEVEL < 908
155# error "OPENSSL_API_COMPAT expresses an impossible API compatibility level"
156# endif
157
158/*
159 * Define macros for deprecation and simulated removal purposes.
160 *
161 * The macros OSSL_DEPRECATED_{major}_{minor} are always defined for
162 * all OpenSSL versions we care for. They can be used as attributes
163 * in function declarations where appropriate.
164 *
165 * The macros OPENSSL_NO_DEPRECATED_{major}_{minor} are defined for
166 * all OpenSSL versions up to or equal to the version given with
167 * OPENSSL_API_COMPAT. They are used as guards around anything that's
168 * deprecated up to that version, as an effect of the developer option
169 * 'no-deprecated'.
170 */
171
172# undef OPENSSL_NO_DEPRECATED_3_0
173# undef OPENSSL_NO_DEPRECATED_1_1_1
174# undef OPENSSL_NO_DEPRECATED_1_1_0
175# undef OPENSSL_NO_DEPRECATED_1_0_2
176# undef OPENSSL_NO_DEPRECATED_1_0_1
177# undef OPENSSL_NO_DEPRECATED_1_0_0
178# undef OPENSSL_NO_DEPRECATED_0_9_8
179
180# if OPENSSL_API_LEVEL >= 30000
181# ifndef OPENSSL_NO_DEPRECATED
182# define OSSL_DEPRECATEDIN_3_0 OSSL_DEPRECATED(3.0)
183# define OSSL_DEPRECATEDIN_3_0_FOR(msg) OSSL_DEPRECATED_FOR(3.0, msg)
184# else
185# define OPENSSL_NO_DEPRECATED_3_0
186# endif
187# else
188# define OSSL_DEPRECATEDIN_3_0
189# define OSSL_DEPRECATEDIN_3_0_FOR(msg)
190# endif
191# if OPENSSL_API_LEVEL >= 10101
192# ifndef OPENSSL_NO_DEPRECATED
193# define OSSL_DEPRECATEDIN_1_1_1 OSSL_DEPRECATED(1.1.1)
194# define OSSL_DEPRECATEDIN_1_1_1_FOR(msg) OSSL_DEPRECATED_FOR(1.1.1, msg)
195# else
196# define OPENSSL_NO_DEPRECATED_1_1_1
197# endif
198# else
199# define OSSL_DEPRECATEDIN_1_1_1
200# define OSSL_DEPRECATEDIN_1_1_1_FOR(msg)
201# endif
202# if OPENSSL_API_LEVEL >= 10100
203# ifndef OPENSSL_NO_DEPRECATED
204# define OSSL_DEPRECATEDIN_1_1_0 OSSL_DEPRECATED(1.1.0)
205# define OSSL_DEPRECATEDIN_1_1_0_FOR(msg) OSSL_DEPRECATED_FOR(1.1.0, msg)
206# else
207# define OPENSSL_NO_DEPRECATED_1_1_0
208# endif
209# else
210# define OSSL_DEPRECATEDIN_1_1_0
211# define OSSL_DEPRECATEDIN_1_1_0_FOR(msg)
212# endif
213# if OPENSSL_API_LEVEL >= 10002
214# ifndef OPENSSL_NO_DEPRECATED
215# define OSSL_DEPRECATEDIN_1_0_2 OSSL_DEPRECATED(1.0.2)
216# define OSSL_DEPRECATEDIN_1_0_2_FOR(msg) OSSL_DEPRECATED_FOR(1.0.2, msg)
217# else
218# define OPENSSL_NO_DEPRECATED_1_0_2
219# endif
220# else
221# define OSSL_DEPRECATEDIN_1_0_2
222# define OSSL_DEPRECATEDIN_1_0_2_FOR(msg)
223# endif
224# if OPENSSL_API_LEVEL >= 10001
225# ifndef OPENSSL_NO_DEPRECATED
226# define OSSL_DEPRECATEDIN_1_0_1 OSSL_DEPRECATED(1.0.1)
227# define OSSL_DEPRECATEDIN_1_0_1_FOR(msg) OSSL_DEPRECATED_FOR(1.0.1, msg)
228# else
229# define OPENSSL_NO_DEPRECATED_1_0_1
230# endif
231# else
232# define OSSL_DEPRECATEDIN_1_0_1
233# define OSSL_DEPRECATEDIN_1_0_1_FOR(msg)
234# endif
235# if OPENSSL_API_LEVEL >= 10000
236# ifndef OPENSSL_NO_DEPRECATED
237# define OSSL_DEPRECATEDIN_1_0_0 OSSL_DEPRECATED(1.0.0)
238# define OSSL_DEPRECATEDIN_1_0_0_FOR(msg) OSSL_DEPRECATED_FOR(1.0.0, msg)
239# else
240# define OPENSSL_NO_DEPRECATED_1_0_0
241# endif
242# else
243# define OSSL_DEPRECATEDIN_1_0_0
244# define OSSL_DEPRECATEDIN_1_0_0_FOR(msg)
245# endif
246# if OPENSSL_API_LEVEL >= 908
247# ifndef OPENSSL_NO_DEPRECATED
248# define OSSL_DEPRECATEDIN_0_9_8 OSSL_DEPRECATED(0.9.8)
249# define OSSL_DEPRECATEDIN_0_9_8_FOR(msg) OSSL_DEPRECATED_FOR(0.9.8, msg)
250# else
251# define OPENSSL_NO_DEPRECATED_0_9_8
252# endif
253# else
254# define OSSL_DEPRECATEDIN_0_9_8
255# define OSSL_DEPRECATEDIN_0_9_8_FOR(msg)
256# endif
257
258/*
259 * Make our own variants of __FILE__ and __LINE__, depending on configuration
260 */
261
262# ifndef OPENSSL_FILE
263# ifdef OPENSSL_NO_FILENAMES
264# define OPENSSL_FILE ""
265# define OPENSSL_LINE 0
266# else
267# define OPENSSL_FILE __FILE__
268# define OPENSSL_LINE __LINE__
269# endif
270# endif
271
272/*
273 * __func__ was standardized in C99, so for any compiler that claims
274 * to implement that language level or newer, we assume we can safely
275 * use that symbol.
276 *
277 * GNU C also provides __FUNCTION__ since version 2, which predates
278 * C99. We can, however, only use this if __STDC_VERSION__ exists,
279 * as it's otherwise not allowed according to ISO C standards (C90).
280 * (compiling with GNU C's -pedantic tells us so)
281 *
282 * If none of the above applies, we check if the compiler is MSVC,
283 * and use __FUNCTION__ if that's the case.
284 */
285# ifndef OPENSSL_FUNC
286# if defined(__STDC_VERSION__)
287# if __STDC_VERSION__ >= 199901L
288# define OPENSSL_FUNC __func__
289# elif defined(__GNUC__) && __GNUC__ >= 2
290# define OPENSSL_FUNC __FUNCTION__
291# endif
292# elif defined(_MSC_VER)
293# define OPENSSL_FUNC __FUNCTION__
294# endif
295/*
296 * If all these possibilities are exhausted, we give up and use a
297 * static string.
298 */
299# ifndef OPENSSL_FUNC
300# define OPENSSL_FUNC "(unknown function)"
301# endif
302# endif
303
304#endif /* OPENSSL_MACROS_H */
305