1 /* Copyright (c) 2014, Google Inc.
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.
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. */
15 #include <openssl/crypto.h>
17 #include <openssl/cpu.h>
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
33 // Otherwise, don't emit a static initialiser.
35 #if !defined(BORINGSSL_NO_STATIC_INITIALIZER)
36 #define BORINGSSL_NO_STATIC_INITIALIZER
39 #endif /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64 ||
40 OPENSSL_ARM || OPENSSL_AARCH64) */
43 // Our assembly does not use the GOT to reference symbols, which means
44 // references to visible symbols will often require a TEXTREL. This is
45 // undesirable, so all assembly-referenced symbols should be hidden. CPU
46 // capabilities are the only such symbols defined in C. Explicitly hide them,
47 // rather than rely on being built with -fvisibility=hidden.
48 #if defined(OPENSSL_WINDOWS)
51 #define HIDDEN __attribute__((visibility("hidden")))
55 // The capability variables are defined in this file in order to work around a
56 // linker bug. When linking with a .a, if no symbols in a .o are referenced
57 // then the .o is discarded, even if it has constructor functions.
59 // This still means that any binaries that don't include some functionality
60 // that tests the capability values will still skip the constructor but, so
61 // far, the init constructor function only sets the capability variables.
63 #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
65 // This value must be explicitly initialised to zero in order to work around a
66 // bug in libtool or the linker on OS X.
68 // If not initialised then it becomes a "common symbol". When put into an
69 // archive, linking on OS X will fail to resolve common symbols. By
70 // initialising it to zero, it becomes a "data symbol", which isn't so
72 HIDDEN uint32_t OPENSSL_ia32cap_P[4] = {0};
74 #elif defined(OPENSSL_PPC64LE)
76 HIDDEN unsigned long OPENSSL_ppc64le_hwcap2 = 0;
78 #elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
80 #include <openssl/arm_arch.h>
82 #if defined(OPENSSL_STATIC_ARMCAP)
84 HIDDEN uint32_t OPENSSL_armcap_P =
85 #if defined(OPENSSL_STATIC_ARMCAP_NEON) || defined(__ARM_NEON__)
88 #if defined(OPENSSL_STATIC_ARMCAP_AES) || defined(__ARM_FEATURE_CRYPTO)
91 #if defined(OPENSSL_STATIC_ARMCAP_SHA1) || defined(__ARM_FEATURE_CRYPTO)
94 #if defined(OPENSSL_STATIC_ARMCAP_SHA256) || defined(__ARM_FEATURE_CRYPTO)
97 #if defined(OPENSSL_STATIC_ARMCAP_PMULL) || defined(__ARM_FEATURE_CRYPTO)
103 HIDDEN uint32_t OPENSSL_armcap_P = 0;
108 #if defined(BORINGSSL_FIPS)
109 // In FIPS mode, the power-on self-test function calls |CRYPTO_library_init|
110 // because we have to ensure that CPUID detection occurs first.
111 #define BORINGSSL_NO_STATIC_INITIALIZER
114 #if defined(OPENSSL_WINDOWS) && !defined(BORINGSSL_NO_STATIC_INITIALIZER)
115 #define OPENSSL_CDECL __cdecl
117 #define OPENSSL_CDECL
120 #if defined(BORINGSSL_NO_STATIC_INITIALIZER)
121 static CRYPTO_once_t once = CRYPTO_ONCE_INIT;
122 #elif defined(_MSC_VER)
123 #pragma section(".CRT$XCU", read)
124 static void __cdecl do_library_init(void);
125 __declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) =
128 static void do_library_init(void) __attribute__ ((constructor));
131 // do_library_init is the actual initialization function. If
132 // BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static
133 // initializer. Otherwise, it is called by CRYPTO_library_init.
134 static void OPENSSL_CDECL do_library_init(void) {
135 // WARNING: this function may only configure the capability variables. See the
136 // note above about the linker bug.
137 #if defined(NEED_CPUID)
138 OPENSSL_cpuid_setup();
142 void CRYPTO_library_init(void) {
143 // TODO(davidben): It would be tidier if this build knob could be replaced
144 // with an internal lazy-init mechanism that would handle things correctly
145 // in-library. https://crbug.com/542879
146 #if defined(BORINGSSL_NO_STATIC_INITIALIZER)
147 CRYPTO_once(&once, do_library_init);
151 int CRYPTO_is_confidential_build(void) {
152 #if defined(BORINGSSL_CONFIDENTIAL)
159 int CRYPTO_has_asm(void) {
160 #if defined(OPENSSL_NO_ASM)
167 const char *SSLeay_version(int unused) {
171 const char *OpenSSL_version(int unused) {
175 unsigned long SSLeay(void) {
176 return OPENSSL_VERSION_NUMBER;
179 unsigned long OpenSSL_version_num(void) {
180 return OPENSSL_VERSION_NUMBER;
183 int CRYPTO_malloc_init(void) {
187 void ENGINE_load_builtin_engines(void) {}
189 int ENGINE_register_all_complete(void) {
193 void OPENSSL_load_builtin_modules(void) {}
195 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings) {
196 CRYPTO_library_init();