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 defined(OPENSSL_PPC64LE)) 26 /* x86, x86_64, the ARMs and ppc64le need to record the result of a 27 * cpuid/getauxval call for the asm to work correctly, unless compiled without 28 * asm code. */ 29 #define NEED_CPUID 30 31 #else 32 33 /* Otherwise, don't emit a static initialiser. */ 34 35 #if !defined(BORINGSSL_NO_STATIC_INITIALIZER) 36 #define BORINGSSL_NO_STATIC_INITIALIZER 37 #endif 38 39 #endif /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64 || 40 OPENSSL_ARM || OPENSSL_AARCH64) */ 41 42 43 /* The capability variables are defined in this file in order to work around a 44 * linker bug. When linking with a .a, if no symbols in a .o are referenced 45 * then the .o is discarded, even if it has constructor functions. 46 * 47 * This still means that any binaries that don't include some functionality 48 * that tests the capability values will still skip the constructor but, so 49 * far, the init constructor function only sets the capability variables. */ 50 51 #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) 52 53 /* This value must be explicitly initialised to zero in order to work around a 54 * bug in libtool or the linker on OS X. 55 * 56 * If not initialised then it becomes a "common symbol". When put into an 57 * archive, linking on OS X will fail to resolve common symbols. By 58 * initialising it to zero, it becomes a "data symbol", which isn't so 59 * affected. */ 60 uint32_t OPENSSL_ia32cap_P[4] = {0}; 61 62 #elif defined(OPENSSL_PPC64LE) 63 64 unsigned long OPENSSL_ppc64le_hwcap2 = 0; 65 66 #elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) 67 68 #include <openssl/arm_arch.h> 69 70 #if defined(OPENSSL_STATIC_ARMCAP) 71 72 uint32_t OPENSSL_armcap_P = 73 #if defined(OPENSSL_STATIC_ARMCAP_NEON) || defined(__ARM_NEON__) 74 ARMV7_NEON | 75 #endif 76 #if defined(OPENSSL_STATIC_ARMCAP_AES) || defined(__ARM_FEATURE_CRYPTO) 77 ARMV8_AES | 78 #endif 79 #if defined(OPENSSL_STATIC_ARMCAP_SHA1) || defined(__ARM_FEATURE_CRYPTO) 80 ARMV8_SHA1 | 81 #endif 82 #if defined(OPENSSL_STATIC_ARMCAP_SHA256) || defined(__ARM_FEATURE_CRYPTO) 83 ARMV8_SHA256 | 84 #endif 85 #if defined(OPENSSL_STATIC_ARMCAP_PMULL) || defined(__ARM_FEATURE_CRYPTO) 86 ARMV8_PMULL | 87 #endif 88 0; 89 90 #else 91 uint32_t OPENSSL_armcap_P = 0; 92 #endif 93 94 #endif 95 96 #if defined(BORINGSSL_FIPS) 97 /* In FIPS mode, the power-on self-test function calls |CRYPTO_library_init| 98 * because we have to ensure that CPUID detection occurs first. */ 99 #define BORINGSSL_NO_STATIC_INITIALIZER 100 #endif 101 102 #if defined(OPENSSL_WINDOWS) && !defined(BORINGSSL_NO_STATIC_INITIALIZER) 103 #define OPENSSL_CDECL __cdecl 104 #else 105 #define OPENSSL_CDECL 106 #endif 107 108 #if defined(BORINGSSL_NO_STATIC_INITIALIZER) 109 static CRYPTO_once_t once = CRYPTO_ONCE_INIT; 110 #elif defined(OPENSSL_WINDOWS) 111 #pragma section(".CRT$XCU", read) 112 static void __cdecl do_library_init(void); 113 __declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) = 114 do_library_init; 115 #else 116 static void do_library_init(void) __attribute__ ((constructor)); 117 #endif 118 119 /* do_library_init is the actual initialization function. If 120 * BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static 121 * initializer. Otherwise, it is called by CRYPTO_library_init. */ 122 static void OPENSSL_CDECL do_library_init(void) { 123 /* WARNING: this function may only configure the capability variables. See the 124 * note above about the linker bug. */ 125 #if defined(NEED_CPUID) 126 OPENSSL_cpuid_setup(); 127 #endif 128 } 129 130 void CRYPTO_library_init(void) { 131 /* TODO(davidben): It would be tidier if this build knob could be replaced 132 * with an internal lazy-init mechanism that would handle things correctly 133 * in-library. https://crbug.com/542879 */ 134 #if defined(BORINGSSL_NO_STATIC_INITIALIZER) 135 CRYPTO_once(&once, do_library_init); 136 #endif 137 } 138 139 int CRYPTO_is_confidential_build(void) { 140 #if defined(BORINGSSL_CONFIDENTIAL) 141 return 1; 142 #else 143 return 0; 144 #endif 145 } 146 147 int CRYPTO_has_asm(void) { 148 #if defined(OPENSSL_NO_ASM) 149 return 0; 150 #else 151 return 1; 152 #endif 153 } 154 155 const char *SSLeay_version(int unused) { 156 return "BoringSSL"; 157 } 158 159 unsigned long SSLeay(void) { 160 return OPENSSL_VERSION_NUMBER; 161 } 162 163 int CRYPTO_malloc_init(void) { 164 return 1; 165 } 166 167 void ENGINE_load_builtin_engines(void) {} 168 169 int ENGINE_register_all_complete(void) { 170 return 1; 171 } 172 173 void OPENSSL_load_builtin_modules(void) {} 174
