Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 2 | * All rights reserved. |
| 3 | * |
| 4 | * This package is an SSL implementation written |
| 5 | * by Eric Young (eay@cryptsoft.com). |
| 6 | * The implementation was written so as to conform with Netscapes SSL. |
| 7 | * |
| 8 | * This library is free for commercial and non-commercial use as long as |
| 9 | * the following conditions are aheared to. The following conditions |
| 10 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 12 | * included with this distribution is covered by the same copyright terms |
| 13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 14 | * |
| 15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 16 | * the code are not to be removed. |
| 17 | * If this package is used in a product, Eric Young should be given attribution |
| 18 | * as the author of the parts of the library used. |
| 19 | * This can be in the form of a textual message at program startup or |
| 20 | * in documentation (online or textual) provided with the package. |
| 21 | * |
| 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions |
| 24 | * are met: |
| 25 | * 1. Redistributions of source code must retain the copyright |
| 26 | * notice, this list of conditions and the following disclaimer. |
| 27 | * 2. Redistributions in binary form must reproduce the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer in the |
| 29 | * documentation and/or other materials provided with the distribution. |
| 30 | * 3. All advertising materials mentioning features or use of this software |
| 31 | * must display the following acknowledgement: |
| 32 | * "This product includes cryptographic software written by |
| 33 | * Eric Young (eay@cryptsoft.com)" |
| 34 | * The word 'cryptographic' can be left out if the rouines from the library |
| 35 | * being used are not cryptographic related :-). |
| 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 37 | * the apps directory (application code) you must include an acknowledgement: |
| 38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 39 | * |
| 40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 50 | * SUCH DAMAGE. |
| 51 | * |
| 52 | * The licence and distribution terms for any publically available version or |
| 53 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 54 | * copied and put under another distribution licence |
| 55 | * [including the GNU Public Licence.] |
| 56 | */ |
| 57 | /* ==================================================================== |
| 58 | * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. |
| 59 | * |
| 60 | * Redistribution and use in source and binary forms, with or without |
| 61 | * modification, are permitted provided that the following conditions |
| 62 | * are met: |
| 63 | * |
| 64 | * 1. Redistributions of source code must retain the above copyright |
| 65 | * notice, this list of conditions and the following disclaimer. |
| 66 | * |
| 67 | * 2. Redistributions in binary form must reproduce the above copyright |
| 68 | * notice, this list of conditions and the following disclaimer in |
| 69 | * the documentation and/or other materials provided with the |
| 70 | * distribution. |
| 71 | * |
| 72 | * 3. All advertising materials mentioning features or use of this |
| 73 | * software must display the following acknowledgment: |
| 74 | * "This product includes software developed by the OpenSSL Project |
| 75 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 76 | * |
| 77 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 78 | * endorse or promote products derived from this software without |
| 79 | * prior written permission. For written permission, please contact |
| 80 | * openssl-core@openssl.org. |
| 81 | * |
| 82 | * 5. Products derived from this software may not be called "OpenSSL" |
| 83 | * nor may "OpenSSL" appear in their names without prior written |
| 84 | * permission of the OpenSSL Project. |
| 85 | * |
| 86 | * 6. Redistributions of any form whatsoever must retain the following |
| 87 | * acknowledgment: |
| 88 | * "This product includes software developed by the OpenSSL Project |
| 89 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 90 | * |
| 91 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 92 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 93 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 94 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 95 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 96 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 97 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 98 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 99 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 100 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 101 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 102 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 103 | * ==================================================================== |
| 104 | * |
| 105 | * This product includes cryptographic software written by Eric Young |
| 106 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 107 | * Hudson (tjh@cryptsoft.com). */ |
| 108 | |
| 109 | #ifndef OPENSSL_HEADER_CRYPTO_INTERNAL_H |
| 110 | #define OPENSSL_HEADER_CRYPTO_INTERNAL_H |
| 111 | |
| 112 | #include <openssl/ex_data.h> |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame^] | 113 | #include <openssl/stack.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 114 | #include <openssl/thread.h> |
| 115 | |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 116 | #include <string.h> |
| 117 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 118 | #if defined(_MSC_VER) |
| 119 | #if !defined(__cplusplus) || _MSC_VER < 1900 |
| 120 | #define alignas(x) __declspec(align(x)) |
| 121 | #define alignof __alignof |
| 122 | #endif |
| 123 | #else |
| 124 | #include <stdalign.h> |
| 125 | #endif |
| 126 | |
David Benjamin | 7c0d06c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 127 | #if !defined(OPENSSL_NO_THREADS) && \ |
| 128 | (!defined(OPENSSL_WINDOWS) || defined(__MINGW32__)) |
| 129 | #include <pthread.h> |
| 130 | #define OPENSSL_PTHREADS |
| 131 | #endif |
| 132 | |
| 133 | #if !defined(OPENSSL_NO_THREADS) && !defined(OPENSSL_PTHREADS) && \ |
| 134 | defined(OPENSSL_WINDOWS) |
| 135 | #define OPENSSL_WINDOWS_THREADS |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 136 | OPENSSL_MSVC_PRAGMA(warning(push, 3)) |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 137 | #include <windows.h> |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 138 | OPENSSL_MSVC_PRAGMA(warning(pop)) |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 139 | #endif |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 140 | |
| 141 | #if defined(__cplusplus) |
| 142 | extern "C" { |
| 143 | #endif |
| 144 | |
| 145 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 146 | #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || defined(OPENSSL_ARM) || \ |
Steven Valdez | bb1ceac | 2016-10-07 10:34:51 -0400 | [diff] [blame] | 147 | defined(OPENSSL_AARCH64) || defined(OPENSSL_PPC64LE) |
| 148 | /* OPENSSL_cpuid_setup initializes the platform-specific feature cache. */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 149 | void OPENSSL_cpuid_setup(void); |
| 150 | #endif |
| 151 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 152 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 153 | #if !defined(_MSC_VER) && defined(OPENSSL_64_BIT) |
| 154 | typedef __int128_t int128_t; |
| 155 | typedef __uint128_t uint128_t; |
| 156 | #endif |
| 157 | |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 158 | #define OPENSSL_ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0])) |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 159 | |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 160 | /* buffers_alias returns one if |a| and |b| alias and zero otherwise. */ |
| 161 | static inline int buffers_alias(const uint8_t *a, size_t a_len, |
| 162 | const uint8_t *b, size_t b_len) { |
| 163 | /* Cast |a| and |b| to integers. In C, pointer comparisons between unrelated |
| 164 | * objects are undefined whereas pointer to integer conversions are merely |
| 165 | * implementation-defined. We assume the implementation defined it in a sane |
| 166 | * way. */ |
| 167 | uintptr_t a_u = (uintptr_t)a; |
| 168 | uintptr_t b_u = (uintptr_t)b; |
| 169 | return a_u + a_len > b_u && b_u + b_len > a_u; |
| 170 | } |
| 171 | |
| 172 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 173 | /* Constant-time utility functions. |
| 174 | * |
| 175 | * The following methods return a bitmask of all ones (0xff...f) for true and 0 |
| 176 | * for false. This is useful for choosing a value based on the result of a |
| 177 | * conditional in constant time. For example, |
| 178 | * |
| 179 | * if (a < b) { |
| 180 | * c = a; |
| 181 | * } else { |
| 182 | * c = b; |
| 183 | * } |
| 184 | * |
| 185 | * can be written as |
| 186 | * |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 187 | * crypto_word_t lt = constant_time_lt_w(a, b); |
| 188 | * c = constant_time_select_w(lt, a, b); */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 189 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 190 | /* crypto_word_t is the type that most constant-time functions use. Ideally we |
| 191 | * would like it to be |size_t|, but NaCl builds in 64-bit mode with 32-bit |
| 192 | * pointers, which means that |size_t| can be 32 bits when |BN_ULONG| is 64 |
| 193 | * bits. Since we want to be able to do constant-time operations on a |
| 194 | * |BN_ULONG|, |crypto_word_t| is defined as an unsigned value with the native |
| 195 | * word length. */ |
| 196 | #if defined(OPENSSL_64_BIT) |
| 197 | typedef uint64_t crypto_word_t; |
| 198 | #elif defined(OPENSSL_32_BIT) |
| 199 | typedef uint32_t crypto_word_t; |
| 200 | #else |
| 201 | #error "Must define either OPENSSL_32_BIT or OPENSSL_64_BIT" |
| 202 | #endif |
| 203 | |
| 204 | #define CONSTTIME_TRUE_W ~((crypto_word_t)0) |
| 205 | #define CONSTTIME_FALSE_W ((crypto_word_t)0) |
| 206 | #define CONSTTIME_TRUE_8 ((uint8_t)0xff) |
| 207 | |
| 208 | #define CONSTTIME_TRUE_W ~((crypto_word_t)0) |
| 209 | #define CONSTTIME_FALSE_W ((crypto_word_t)0) |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 210 | #define CONSTTIME_TRUE_8 ((uint8_t)0xff) |
| 211 | #define CONSTTIME_FALSE_8 ((uint8_t)0) |
| 212 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 213 | /* constant_time_msb_w returns the given value with the MSB copied to all the |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 214 | * other bits. */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 215 | static inline crypto_word_t constant_time_msb_w(crypto_word_t a) { |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 216 | return 0u - (a >> (sizeof(a) * 8 - 1)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 217 | } |
| 218 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 219 | /* constant_time_lt_w returns 0xff..f if a < b and 0 otherwise. */ |
| 220 | static inline crypto_word_t constant_time_lt_w(crypto_word_t a, |
| 221 | crypto_word_t b) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 222 | /* Consider the two cases of the problem: |
| 223 | * msb(a) == msb(b): a < b iff the MSB of a - b is set. |
| 224 | * msb(a) != msb(b): a < b iff the MSB of b is set. |
| 225 | * |
| 226 | * If msb(a) == msb(b) then the following evaluates as: |
| 227 | * msb(a^((a^b)|((a-b)^a))) == |
| 228 | * msb(a^((a-b) ^ a)) == (because msb(a^b) == 0) |
| 229 | * msb(a^a^(a-b)) == (rearranging) |
| 230 | * msb(a-b) (because ∀x. x^x == 0) |
| 231 | * |
| 232 | * Else, if msb(a) != msb(b) then the following evaluates as: |
| 233 | * msb(a^((a^b)|((a-b)^a))) == |
| 234 | * msb(a^(𝟙 | ((a-b)^a))) == (because msb(a^b) == 1 and 𝟙 |
| 235 | * represents a value s.t. msb(𝟙) = 1) |
| 236 | * msb(a^𝟙) == (because ORing with 1 results in 1) |
| 237 | * msb(b) |
| 238 | * |
| 239 | * |
| 240 | * Here is an SMT-LIB verification of this formula: |
| 241 | * |
| 242 | * (define-fun lt ((a (_ BitVec 32)) (b (_ BitVec 32))) (_ BitVec 32) |
| 243 | * (bvxor a (bvor (bvxor a b) (bvxor (bvsub a b) a))) |
| 244 | * ) |
| 245 | * |
| 246 | * (declare-fun a () (_ BitVec 32)) |
| 247 | * (declare-fun b () (_ BitVec 32)) |
| 248 | * |
| 249 | * (assert (not (= (= #x00000001 (bvlshr (lt a b) #x0000001f)) (bvult a b)))) |
| 250 | * (check-sat) |
| 251 | * (get-model) |
| 252 | */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 253 | return constant_time_msb_w(a^((a^b)|((a-b)^a))); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 254 | } |
| 255 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 256 | /* constant_time_lt_8 acts like |constant_time_lt_w| but returns an 8-bit |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 257 | * mask. */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 258 | static inline uint8_t constant_time_lt_8(crypto_word_t a, crypto_word_t b) { |
| 259 | return (uint8_t)(constant_time_lt_w(a, b)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 260 | } |
| 261 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 262 | /* constant_time_ge_w returns 0xff..f if a >= b and 0 otherwise. */ |
| 263 | static inline crypto_word_t constant_time_ge_w(crypto_word_t a, |
| 264 | crypto_word_t b) { |
| 265 | return ~constant_time_lt_w(a, b); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 266 | } |
| 267 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 268 | /* constant_time_ge_8 acts like |constant_time_ge_w| but returns an 8-bit |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 269 | * mask. */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 270 | static inline uint8_t constant_time_ge_8(crypto_word_t a, crypto_word_t b) { |
| 271 | return (uint8_t)(constant_time_ge_w(a, b)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | /* constant_time_is_zero returns 0xff..f if a == 0 and 0 otherwise. */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 275 | static inline crypto_word_t constant_time_is_zero_w(crypto_word_t a) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 276 | /* Here is an SMT-LIB verification of this formula: |
| 277 | * |
| 278 | * (define-fun is_zero ((a (_ BitVec 32))) (_ BitVec 32) |
| 279 | * (bvand (bvnot a) (bvsub a #x00000001)) |
| 280 | * ) |
| 281 | * |
| 282 | * (declare-fun a () (_ BitVec 32)) |
| 283 | * |
| 284 | * (assert (not (= (= #x00000001 (bvlshr (is_zero a) #x0000001f)) (= a #x00000000)))) |
| 285 | * (check-sat) |
| 286 | * (get-model) |
| 287 | */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 288 | return constant_time_msb_w(~a & (a - 1)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 289 | } |
| 290 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 291 | /* constant_time_is_zero_8 acts like |constant_time_is_zero_w| but returns an |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 292 | * 8-bit mask. */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 293 | static inline uint8_t constant_time_is_zero_8(crypto_word_t a) { |
| 294 | return (uint8_t)(constant_time_is_zero_w(a)); |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 295 | } |
| 296 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 297 | /* constant_time_eq_w returns 0xff..f if a == b and 0 otherwise. */ |
| 298 | static inline crypto_word_t constant_time_eq_w(crypto_word_t a, |
| 299 | crypto_word_t b) { |
| 300 | return constant_time_is_zero_w(a ^ b); |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 301 | } |
| 302 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 303 | /* constant_time_eq_8 acts like |constant_time_eq_w| but returns an 8-bit |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 304 | * mask. */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 305 | static inline uint8_t constant_time_eq_8(crypto_word_t a, crypto_word_t b) { |
| 306 | return (uint8_t)(constant_time_eq_w(a, b)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 307 | } |
| 308 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 309 | /* constant_time_eq_int acts like |constant_time_eq_w| but works on int |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 310 | * values. */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 311 | static inline crypto_word_t constant_time_eq_int(int a, int b) { |
| 312 | return constant_time_eq_w((crypto_word_t)(a), (crypto_word_t)(b)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | /* constant_time_eq_int_8 acts like |constant_time_eq_int| but returns an 8-bit |
| 316 | * mask. */ |
| 317 | static inline uint8_t constant_time_eq_int_8(int a, int b) { |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 318 | return constant_time_eq_8((crypto_word_t)(a), (crypto_word_t)(b)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 319 | } |
| 320 | |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 321 | /* constant_time_select_w returns (mask & a) | (~mask & b). When |mask| is all |
Robert Sloan | 6f79a50 | 2017-04-03 09:16:40 -0700 | [diff] [blame] | 322 | * 1s or all 0s (as returned by the methods above), the select methods return |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 323 | * either |a| (if |mask| is nonzero) or |b| (if |mask| is zero). */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 324 | static inline crypto_word_t constant_time_select_w(crypto_word_t mask, |
| 325 | crypto_word_t a, |
| 326 | crypto_word_t b) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 327 | return (mask & a) | (~mask & b); |
| 328 | } |
| 329 | |
| 330 | /* constant_time_select_8 acts like |constant_time_select| but operates on |
| 331 | * 8-bit values. */ |
| 332 | static inline uint8_t constant_time_select_8(uint8_t mask, uint8_t a, |
| 333 | uint8_t b) { |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 334 | return (uint8_t)(constant_time_select_w(mask, a, b)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | /* constant_time_select_int acts like |constant_time_select| but operates on |
| 338 | * ints. */ |
Robert Sloan | 9254e68 | 2017-04-24 09:42:06 -0700 | [diff] [blame] | 339 | static inline int constant_time_select_int(crypto_word_t mask, int a, int b) { |
| 340 | return (int)(constant_time_select_w(mask, (crypto_word_t)(a), |
| 341 | (crypto_word_t)(b))); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 345 | /* Thread-safe initialisation. */ |
| 346 | |
| 347 | #if defined(OPENSSL_NO_THREADS) |
| 348 | typedef uint32_t CRYPTO_once_t; |
| 349 | #define CRYPTO_ONCE_INIT 0 |
David Benjamin | 7c0d06c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 350 | #elif defined(OPENSSL_WINDOWS_THREADS) |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 351 | typedef INIT_ONCE CRYPTO_once_t; |
| 352 | #define CRYPTO_ONCE_INIT INIT_ONCE_STATIC_INIT |
David Benjamin | 7c0d06c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 353 | #elif defined(OPENSSL_PTHREADS) |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 354 | typedef pthread_once_t CRYPTO_once_t; |
| 355 | #define CRYPTO_ONCE_INIT PTHREAD_ONCE_INIT |
David Benjamin | 7c0d06c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 356 | #else |
| 357 | #error "Unknown threading library" |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 358 | #endif |
| 359 | |
| 360 | /* CRYPTO_once calls |init| exactly once per process. This is thread-safe: if |
| 361 | * concurrent threads call |CRYPTO_once| with the same |CRYPTO_once_t| argument |
| 362 | * then they will block until |init| completes, but |init| will have only been |
| 363 | * called once. |
| 364 | * |
| 365 | * The |once| argument must be a |CRYPTO_once_t| that has been initialised with |
| 366 | * the value |CRYPTO_ONCE_INIT|. */ |
| 367 | OPENSSL_EXPORT void CRYPTO_once(CRYPTO_once_t *once, void (*init)(void)); |
| 368 | |
| 369 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 370 | /* Reference counting. */ |
| 371 | |
| 372 | /* CRYPTO_REFCOUNT_MAX is the value at which the reference count saturates. */ |
| 373 | #define CRYPTO_REFCOUNT_MAX 0xffffffff |
| 374 | |
| 375 | /* CRYPTO_refcount_inc atomically increments the value at |*count| unless the |
| 376 | * value would overflow. It's safe for multiple threads to concurrently call |
| 377 | * this or |CRYPTO_refcount_dec_and_test_zero| on the same |
| 378 | * |CRYPTO_refcount_t|. */ |
| 379 | OPENSSL_EXPORT void CRYPTO_refcount_inc(CRYPTO_refcount_t *count); |
| 380 | |
| 381 | /* CRYPTO_refcount_dec_and_test_zero tests the value at |*count|: |
| 382 | * if it's zero, it crashes the address space. |
| 383 | * if it's the maximum value, it returns zero. |
| 384 | * otherwise, it atomically decrements it and returns one iff the resulting |
| 385 | * value is zero. |
| 386 | * |
| 387 | * It's safe for multiple threads to concurrently call this or |
| 388 | * |CRYPTO_refcount_inc| on the same |CRYPTO_refcount_t|. */ |
| 389 | OPENSSL_EXPORT int CRYPTO_refcount_dec_and_test_zero(CRYPTO_refcount_t *count); |
| 390 | |
| 391 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 392 | /* Locks. |
| 393 | * |
| 394 | * Two types of locks are defined: |CRYPTO_MUTEX|, which can be used in |
| 395 | * structures as normal, and |struct CRYPTO_STATIC_MUTEX|, which can be used as |
| 396 | * a global lock. A global lock must be initialised to the value |
| 397 | * |CRYPTO_STATIC_MUTEX_INIT|. |
| 398 | * |
| 399 | * |CRYPTO_MUTEX| can appear in public structures and so is defined in |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 400 | * thread.h as a structure large enough to fit the real type. The global lock is |
| 401 | * a different type so it may be initialized with platform initializer macros.*/ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 402 | |
| 403 | #if defined(OPENSSL_NO_THREADS) |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 404 | struct CRYPTO_STATIC_MUTEX { |
| 405 | char padding; /* Empty structs have different sizes in C and C++. */ |
| 406 | }; |
| 407 | #define CRYPTO_STATIC_MUTEX_INIT { 0 } |
David Benjamin | 7c0d06c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 408 | #elif defined(OPENSSL_WINDOWS_THREADS) |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 409 | struct CRYPTO_STATIC_MUTEX { |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 410 | SRWLOCK lock; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 411 | }; |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 412 | #define CRYPTO_STATIC_MUTEX_INIT { SRWLOCK_INIT } |
David Benjamin | 7c0d06c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 413 | #elif defined(OPENSSL_PTHREADS) |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 414 | struct CRYPTO_STATIC_MUTEX { |
| 415 | pthread_rwlock_t lock; |
| 416 | }; |
| 417 | #define CRYPTO_STATIC_MUTEX_INIT { PTHREAD_RWLOCK_INITIALIZER } |
David Benjamin | 7c0d06c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 418 | #else |
| 419 | #error "Unknown threading library" |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 420 | #endif |
| 421 | |
| 422 | /* CRYPTO_MUTEX_init initialises |lock|. If |lock| is a static variable, use a |
| 423 | * |CRYPTO_STATIC_MUTEX|. */ |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 424 | OPENSSL_EXPORT void CRYPTO_MUTEX_init(CRYPTO_MUTEX *lock); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 425 | |
| 426 | /* CRYPTO_MUTEX_lock_read locks |lock| such that other threads may also have a |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 427 | * read lock, but none may have a write lock. */ |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 428 | OPENSSL_EXPORT void CRYPTO_MUTEX_lock_read(CRYPTO_MUTEX *lock); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 429 | |
| 430 | /* CRYPTO_MUTEX_lock_write locks |lock| such that no other thread has any type |
| 431 | * of lock on it. */ |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 432 | OPENSSL_EXPORT void CRYPTO_MUTEX_lock_write(CRYPTO_MUTEX *lock); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 433 | |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 434 | /* CRYPTO_MUTEX_unlock_read unlocks |lock| for reading. */ |
| 435 | OPENSSL_EXPORT void CRYPTO_MUTEX_unlock_read(CRYPTO_MUTEX *lock); |
| 436 | |
| 437 | /* CRYPTO_MUTEX_unlock_write unlocks |lock| for writing. */ |
| 438 | OPENSSL_EXPORT void CRYPTO_MUTEX_unlock_write(CRYPTO_MUTEX *lock); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 439 | |
| 440 | /* CRYPTO_MUTEX_cleanup releases all resources held by |lock|. */ |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 441 | OPENSSL_EXPORT void CRYPTO_MUTEX_cleanup(CRYPTO_MUTEX *lock); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 442 | |
| 443 | /* CRYPTO_STATIC_MUTEX_lock_read locks |lock| such that other threads may also |
| 444 | * have a read lock, but none may have a write lock. The |lock| variable does |
| 445 | * not need to be initialised by any function, but must have been statically |
| 446 | * initialised with |CRYPTO_STATIC_MUTEX_INIT|. */ |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 447 | OPENSSL_EXPORT void CRYPTO_STATIC_MUTEX_lock_read( |
| 448 | struct CRYPTO_STATIC_MUTEX *lock); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 449 | |
| 450 | /* CRYPTO_STATIC_MUTEX_lock_write locks |lock| such that no other thread has |
| 451 | * any type of lock on it. The |lock| variable does not need to be initialised |
| 452 | * by any function, but must have been statically initialised with |
| 453 | * |CRYPTO_STATIC_MUTEX_INIT|. */ |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 454 | OPENSSL_EXPORT void CRYPTO_STATIC_MUTEX_lock_write( |
| 455 | struct CRYPTO_STATIC_MUTEX *lock); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 456 | |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 457 | /* CRYPTO_STATIC_MUTEX_unlock_read unlocks |lock| for reading. */ |
| 458 | OPENSSL_EXPORT void CRYPTO_STATIC_MUTEX_unlock_read( |
| 459 | struct CRYPTO_STATIC_MUTEX *lock); |
| 460 | |
| 461 | /* CRYPTO_STATIC_MUTEX_unlock_write unlocks |lock| for writing. */ |
| 462 | OPENSSL_EXPORT void CRYPTO_STATIC_MUTEX_unlock_write( |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 463 | struct CRYPTO_STATIC_MUTEX *lock); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 464 | |
| 465 | |
| 466 | /* Thread local storage. */ |
| 467 | |
| 468 | /* thread_local_data_t enumerates the types of thread-local data that can be |
| 469 | * stored. */ |
| 470 | typedef enum { |
| 471 | OPENSSL_THREAD_LOCAL_ERR = 0, |
| 472 | OPENSSL_THREAD_LOCAL_RAND, |
| 473 | OPENSSL_THREAD_LOCAL_TEST, |
| 474 | NUM_OPENSSL_THREAD_LOCALS, |
| 475 | } thread_local_data_t; |
| 476 | |
| 477 | /* thread_local_destructor_t is the type of a destructor function that will be |
| 478 | * called when a thread exits and its thread-local storage needs to be freed. */ |
| 479 | typedef void (*thread_local_destructor_t)(void *); |
| 480 | |
| 481 | /* CRYPTO_get_thread_local gets the pointer value that is stored for the |
| 482 | * current thread for the given index, or NULL if none has been set. */ |
| 483 | OPENSSL_EXPORT void *CRYPTO_get_thread_local(thread_local_data_t value); |
| 484 | |
| 485 | /* CRYPTO_set_thread_local sets a pointer value for the current thread at the |
| 486 | * given index. This function should only be called once per thread for a given |
| 487 | * |index|: rather than update the pointer value itself, update the data that |
| 488 | * is pointed to. |
| 489 | * |
| 490 | * The destructor function will be called when a thread exits to free this |
| 491 | * thread-local data. All calls to |CRYPTO_set_thread_local| with the same |
| 492 | * |index| should have the same |destructor| argument. The destructor may be |
| 493 | * called with a NULL argument if a thread that never set a thread-local |
| 494 | * pointer for |index|, exits. The destructor may be called concurrently with |
| 495 | * different arguments. |
| 496 | * |
| 497 | * This function returns one on success or zero on error. If it returns zero |
| 498 | * then |destructor| has been called with |value| already. */ |
| 499 | OPENSSL_EXPORT int CRYPTO_set_thread_local( |
| 500 | thread_local_data_t index, void *value, |
| 501 | thread_local_destructor_t destructor); |
| 502 | |
| 503 | |
| 504 | /* ex_data */ |
| 505 | |
| 506 | typedef struct crypto_ex_data_func_st CRYPTO_EX_DATA_FUNCS; |
| 507 | |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame^] | 508 | DECLARE_STACK_OF(CRYPTO_EX_DATA_FUNCS) |
| 509 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 510 | /* CRYPTO_EX_DATA_CLASS tracks the ex_indices registered for a type which |
| 511 | * supports ex_data. It should defined as a static global within the module |
| 512 | * which defines that type. */ |
| 513 | typedef struct { |
| 514 | struct CRYPTO_STATIC_MUTEX lock; |
| 515 | STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 516 | /* num_reserved is one if the ex_data index zero is reserved for legacy |
| 517 | * |TYPE_get_app_data| functions. */ |
| 518 | uint8_t num_reserved; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 519 | } CRYPTO_EX_DATA_CLASS; |
| 520 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 521 | #define CRYPTO_EX_DATA_CLASS_INIT {CRYPTO_STATIC_MUTEX_INIT, NULL, 0} |
| 522 | #define CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA \ |
| 523 | {CRYPTO_STATIC_MUTEX_INIT, NULL, 1} |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 524 | |
| 525 | /* CRYPTO_get_ex_new_index allocates a new index for |ex_data_class| and writes |
| 526 | * it to |*out_index|. Each class of object should provide a wrapper function |
| 527 | * that uses the correct |CRYPTO_EX_DATA_CLASS|. It returns one on success and |
| 528 | * zero otherwise. */ |
| 529 | OPENSSL_EXPORT int CRYPTO_get_ex_new_index(CRYPTO_EX_DATA_CLASS *ex_data_class, |
| 530 | int *out_index, long argl, |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame^] | 531 | void *argp, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 532 | CRYPTO_EX_free *free_func); |
| 533 | |
| 534 | /* CRYPTO_set_ex_data sets an extra data pointer on a given object. Each class |
| 535 | * of object should provide a wrapper function. */ |
| 536 | OPENSSL_EXPORT int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int index, void *val); |
| 537 | |
| 538 | /* CRYPTO_get_ex_data returns an extra data pointer for a given object, or NULL |
| 539 | * if no such index exists. Each class of object should provide a wrapper |
| 540 | * function. */ |
| 541 | OPENSSL_EXPORT void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int index); |
| 542 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 543 | /* CRYPTO_new_ex_data initialises a newly allocated |CRYPTO_EX_DATA|. */ |
| 544 | OPENSSL_EXPORT void CRYPTO_new_ex_data(CRYPTO_EX_DATA *ad); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 545 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 546 | /* CRYPTO_free_ex_data frees |ad|, which is embedded inside |obj|, which is an |
| 547 | * object of the given class. */ |
| 548 | OPENSSL_EXPORT void CRYPTO_free_ex_data(CRYPTO_EX_DATA_CLASS *ex_data_class, |
| 549 | void *obj, CRYPTO_EX_DATA *ad); |
| 550 | |
| 551 | |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 552 | /* Language bug workarounds. |
| 553 | * |
| 554 | * Most C standard library functions are undefined if passed NULL, even when the |
| 555 | * corresponding length is zero. This gives them (and, in turn, all functions |
| 556 | * which call them) surprising behavior on empty arrays. Some compilers will |
| 557 | * miscompile code due to this rule. See also |
| 558 | * https://www.imperialviolet.org/2016/06/26/nonnull.html |
| 559 | * |
| 560 | * These wrapper functions behave the same as the corresponding C standard |
| 561 | * functions, but behave as expected when passed NULL if the length is zero. |
| 562 | * |
| 563 | * Note |OPENSSL_memcmp| is a different function from |CRYPTO_memcmp|. */ |
| 564 | |
| 565 | /* C++ defines |memchr| as a const-correct overload. */ |
| 566 | #if defined(__cplusplus) |
| 567 | extern "C++" { |
| 568 | |
| 569 | static inline const void *OPENSSL_memchr(const void *s, int c, size_t n) { |
| 570 | if (n == 0) { |
| 571 | return NULL; |
| 572 | } |
| 573 | |
| 574 | return memchr(s, c, n); |
| 575 | } |
| 576 | |
| 577 | static inline void *OPENSSL_memchr(void *s, int c, size_t n) { |
| 578 | if (n == 0) { |
| 579 | return NULL; |
| 580 | } |
| 581 | |
| 582 | return memchr(s, c, n); |
| 583 | } |
| 584 | |
| 585 | } /* extern "C++" */ |
| 586 | #else /* __cplusplus */ |
| 587 | |
| 588 | static inline void *OPENSSL_memchr(const void *s, int c, size_t n) { |
| 589 | if (n == 0) { |
| 590 | return NULL; |
| 591 | } |
| 592 | |
| 593 | return memchr(s, c, n); |
| 594 | } |
| 595 | |
| 596 | #endif /* __cplusplus */ |
| 597 | |
| 598 | static inline int OPENSSL_memcmp(const void *s1, const void *s2, size_t n) { |
| 599 | if (n == 0) { |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | return memcmp(s1, s2, n); |
| 604 | } |
| 605 | |
| 606 | static inline void *OPENSSL_memcpy(void *dst, const void *src, size_t n) { |
| 607 | if (n == 0) { |
| 608 | return dst; |
| 609 | } |
| 610 | |
| 611 | return memcpy(dst, src, n); |
| 612 | } |
| 613 | |
| 614 | static inline void *OPENSSL_memmove(void *dst, const void *src, size_t n) { |
| 615 | if (n == 0) { |
| 616 | return dst; |
| 617 | } |
| 618 | |
| 619 | return memmove(dst, src, n); |
| 620 | } |
| 621 | |
| 622 | static inline void *OPENSSL_memset(void *dst, int c, size_t n) { |
| 623 | if (n == 0) { |
| 624 | return dst; |
| 625 | } |
| 626 | |
| 627 | return memset(dst, c, n); |
| 628 | } |
| 629 | |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame^] | 630 | #if defined(BORINGSSL_FIPS) |
| 631 | /* BORINGSSL_FIPS_abort is called when a FIPS power-on or continuous test |
| 632 | * fails. It prevents any further cryptographic operations by the current |
| 633 | * process. */ |
| 634 | void BORINGSSL_FIPS_abort(void) __attribute__((noreturn)); |
| 635 | #endif |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 636 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 637 | #if defined(__cplusplus) |
| 638 | } /* extern C */ |
| 639 | #endif |
| 640 | |
| 641 | #endif /* OPENSSL_HEADER_CRYPTO_INTERNAL_H */ |