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. */ 57 uint32_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 64 uint32_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__) 83 uint32_t OPENSSL_armcap_P = ARMV7_NEON | ARMV7_NEON_FUNCTIONAL; 84 #else 85 uint32_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) 98 static CRYPTO_once_t once = CRYPTO_ONCE_INIT; 99 #elif defined(OPENSSL_WINDOWS) 100 #pragma section(".CRT$XCU", read) 101 static void __cdecl do_library_init(void); 102 __declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) = 103 do_library_init; 104 #else 105 static 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. */ 111 static 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 } 118 119 void 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 } 127 128 const char *SSLeay_version(int unused) { 129 return "BoringSSL"; 130 } 131 132 unsigned long SSLeay(void) { 133 return OPENSSL_VERSION_NUMBER; 134 } 135 136 int CRYPTO_malloc_init(void) { 137 return 1; 138 } 139 140 void ENGINE_load_builtin_engines(void) {} 141 142 void OPENSSL_load_builtin_modules(void) {} 143
