1/* Copyright (c) 2014, Google Inc. 2 * 3 * Permission to use, copy, modify, and/or distribute this software for any 4 * purpose with or without fee is hereby granted, provided that the above 5 * copyright notice and this permission notice appear in all copies. 6 * 7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 14 15#include <openssl/crypto.h> 16 17#include <openssl/cpu.h> 18 19#include "internal.h" 20 21 22#if !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_STATIC_ARMCAP) && \ 23 (defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \ 24 defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)) 25/* x86, x86_64 and the ARMs need to record the result of a cpuid call for the 26 * asm to work correctly, unless compiled without asm code. */ 27#define NEED_CPUID 28 29#else 30 31/* Otherwise, don't emit a static initialiser. */ 32 33#if !defined(BORINGSSL_NO_STATIC_INITIALIZER) 34#define BORINGSSL_NO_STATIC_INITIALIZER 35#endif 36 37#endif /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64 || 38 OPENSSL_ARM || OPENSSL_AARCH64) */ 39 40 41/* The capability variables are defined in this file in order to work around a 42 * linker bug. When linking with a .a, if no symbols in a .o are referenced 43 * then the .o is discarded, even if it has constructor functions. 44 * 45 * This still means that any binaries that don't include some functionality 46 * that tests the capability values will still skip the constructor but, so 47 * far, the init constructor function only sets the capability variables. */ 48 49#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) 50/* This value must be explicitly initialised to zero in order to work around a 51 * bug in libtool or the linker on OS X. 52 * 53 * If not initialised then it becomes a "common symbol". When put into an 54 * archive, linking on OS X will fail to resolve common symbols. By 55 * initialising it to zero, it becomes a "data symbol", which isn't so 56 * affected. */ 57uint32_t OPENSSL_ia32cap_P[4] = {0}; 58#elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) 59 60#include <openssl/arm_arch.h> 61 62#if defined(OPENSSL_STATIC_ARMCAP) 63 64uint32_t OPENSSL_armcap_P = 65#if defined(OPENSSL_STATIC_ARMCAP_NEON) || defined(__ARM_NEON__) 66 ARMV7_NEON | ARMV7_NEON_FUNCTIONAL | 67#endif 68#if defined(OPENSSL_STATIC_ARMCAP_AES) 69 ARMV8_AES | 70#endif 71#if defined(OPENSSL_STATIC_ARMCAP_SHA1) 72 ARMV8_SHA1 | 73#endif 74#if defined(OPENSSL_STATIC_ARMCAP_SHA256) 75 ARMV8_SHA256 | 76#endif 77#if defined(OPENSSL_STATIC_ARMCAP_PMULL) 78 ARMV8_PMULL | 79#endif 80 0; 81 82#elif defined(__ARM_NEON__) 83uint32_t OPENSSL_armcap_P = ARMV7_NEON | ARMV7_NEON_FUNCTIONAL; 84#else 85uint32_t OPENSSL_armcap_P = ARMV7_NEON_FUNCTIONAL; 86#endif 87 88#endif 89 90 91#if defined(OPENSSL_WINDOWS) && !defined(BORINGSSL_NO_STATIC_INITIALIZER) 92#define OPENSSL_CDECL __cdecl 93#else 94#define OPENSSL_CDECL 95#endif 96 97#if defined(BORINGSSL_NO_STATIC_INITIALIZER) 98static CRYPTO_once_t once = CRYPTO_ONCE_INIT; 99#elif defined(OPENSSL_WINDOWS) 100#pragma section(".CRT$XCU", read) 101static void __cdecl do_library_init(void); 102__declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) = 103 do_library_init; 104#else 105static void do_library_init(void) __attribute__ ((constructor)); 106#endif 107 108/* do_library_init is the actual initialization function. If 109 * BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static 110 * initializer. Otherwise, it is called by CRYPTO_library_init. */ 111static void OPENSSL_CDECL do_library_init(void) { 112 /* WARNING: this function may only configure the capability variables. See the 113 * note above about the linker bug. */ 114#if defined(NEED_CPUID) 115 OPENSSL_cpuid_setup(); 116#endif 117} 118 119void CRYPTO_library_init(void) { 120 /* TODO(davidben): It would be tidier if this build knob could be replaced 121 * with an internal lazy-init mechanism that would handle things correctly 122 * in-library. https://crbug.com/542879 */ 123#if defined(BORINGSSL_NO_STATIC_INITIALIZER) 124 CRYPTO_once(&once, do_library_init); 125#endif 126} 127 128const char *SSLeay_version(int unused) { 129 return "BoringSSL"; 130} 131 132unsigned long SSLeay(void) { 133 return OPENSSL_VERSION_NUMBER; 134} 135 136int CRYPTO_malloc_init(void) { 137 return 1; 138} 139 140void ENGINE_load_builtin_engines(void) {} 141 142void OPENSSL_load_builtin_modules(void) {} 143