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