|
- /* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
- #include <openssl/crypto.h>
-
- #include <openssl/cpu.h>
-
- #include "internal.h"
-
-
- #if !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_STATIC_ARMCAP) && \
- (defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \
- defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) || \
- defined(OPENSSL_PPC64LE))
- // x86, x86_64, the ARMs and ppc64le need to record the result of a
- // cpuid/getauxval call for the asm to work correctly, unless compiled without
- // asm code.
- #define NEED_CPUID
-
- #else
-
- // Otherwise, don't emit a static initialiser.
-
- #if !defined(BORINGSSL_NO_STATIC_INITIALIZER)
- #define BORINGSSL_NO_STATIC_INITIALIZER
- #endif
-
- #endif /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64 ||
- OPENSSL_ARM || OPENSSL_AARCH64) */
-
-
- // Our assembly does not use the GOT to reference symbols, which means
- // references to visible symbols will often require a TEXTREL. This is
- // undesirable, so all assembly-referenced symbols should be hidden. CPU
- // capabilities are the only such symbols defined in C. Explicitly hide them,
- // rather than rely on being built with -fvisibility=hidden.
- #if defined(OPENSSL_WINDOWS)
- #define HIDDEN
- #else
- #define HIDDEN __attribute__((visibility("hidden")))
- #endif
-
-
- // The capability variables are defined in this file in order to work around a
- // linker bug. When linking with a .a, if no symbols in a .o are referenced
- // then the .o is discarded, even if it has constructor functions.
- //
- // This still means that any binaries that don't include some functionality
- // that tests the capability values will still skip the constructor but, so
- // far, the init constructor function only sets the capability variables.
-
- #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
-
- // This value must be explicitly initialised to zero in order to work around a
- // bug in libtool or the linker on OS X.
- //
- // If not initialised then it becomes a "common symbol". When put into an
- // archive, linking on OS X will fail to resolve common symbols. By
- // initialising it to zero, it becomes a "data symbol", which isn't so
- // affected.
- HIDDEN uint32_t OPENSSL_ia32cap_P[4] = {0};
-
- #elif defined(OPENSSL_PPC64LE)
-
- HIDDEN unsigned long OPENSSL_ppc64le_hwcap2 = 0;
-
- #elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
-
- #include <openssl/arm_arch.h>
-
- #if defined(OPENSSL_STATIC_ARMCAP)
-
- HIDDEN uint32_t OPENSSL_armcap_P =
- #if defined(OPENSSL_STATIC_ARMCAP_NEON) || defined(__ARM_NEON__)
- ARMV7_NEON |
- #endif
- #if defined(OPENSSL_STATIC_ARMCAP_AES) || defined(__ARM_FEATURE_CRYPTO)
- ARMV8_AES |
- #endif
- #if defined(OPENSSL_STATIC_ARMCAP_SHA1) || defined(__ARM_FEATURE_CRYPTO)
- ARMV8_SHA1 |
- #endif
- #if defined(OPENSSL_STATIC_ARMCAP_SHA256) || defined(__ARM_FEATURE_CRYPTO)
- ARMV8_SHA256 |
- #endif
- #if defined(OPENSSL_STATIC_ARMCAP_PMULL) || defined(__ARM_FEATURE_CRYPTO)
- ARMV8_PMULL |
- #endif
- 0;
-
- #else
- HIDDEN uint32_t OPENSSL_armcap_P = 0;
- #endif
-
- #endif
-
- #if defined(BORINGSSL_FIPS)
- // In FIPS mode, the power-on self-test function calls |CRYPTO_library_init|
- // because we have to ensure that CPUID detection occurs first.
- #define BORINGSSL_NO_STATIC_INITIALIZER
- #endif
-
- #if defined(OPENSSL_WINDOWS) && !defined(BORINGSSL_NO_STATIC_INITIALIZER)
- #define OPENSSL_CDECL __cdecl
- #else
- #define OPENSSL_CDECL
- #endif
-
- #if defined(BORINGSSL_NO_STATIC_INITIALIZER)
- static CRYPTO_once_t once = CRYPTO_ONCE_INIT;
- #elif defined(_MSC_VER)
- #pragma section(".CRT$XCU", read)
- static void __cdecl do_library_init(void);
- __declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) =
- do_library_init;
- #else
- static void do_library_init(void) __attribute__ ((constructor));
- #endif
-
- // do_library_init is the actual initialization function. If
- // BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static
- // initializer. Otherwise, it is called by CRYPTO_library_init.
- static void OPENSSL_CDECL do_library_init(void) {
- // WARNING: this function may only configure the capability variables. See the
- // note above about the linker bug.
- #if defined(NEED_CPUID)
- OPENSSL_cpuid_setup();
- #endif
- }
-
- void CRYPTO_library_init(void) {
- // TODO(davidben): It would be tidier if this build knob could be replaced
- // with an internal lazy-init mechanism that would handle things correctly
- // in-library. https://crbug.com/542879
- #if defined(BORINGSSL_NO_STATIC_INITIALIZER)
- CRYPTO_once(&once, do_library_init);
- #endif
- }
-
- int CRYPTO_is_confidential_build(void) {
- #if defined(BORINGSSL_CONFIDENTIAL)
- return 1;
- #else
- return 0;
- #endif
- }
-
- int CRYPTO_has_asm(void) {
- #if defined(OPENSSL_NO_ASM)
- return 0;
- #else
- return 1;
- #endif
- }
-
- const char *SSLeay_version(int unused) { return "BoringSSL"; }
-
- const char *OpenSSL_version(int unused) { return "BoringSSL"; }
-
- unsigned long SSLeay(void) { return OPENSSL_VERSION_NUMBER; }
-
- unsigned long OpenSSL_version_num(void) { return OPENSSL_VERSION_NUMBER; }
-
- int CRYPTO_malloc_init(void) { return 1; }
-
- int OPENSSL_malloc_init(void) { return 1; }
-
- void ENGINE_load_builtin_engines(void) {}
-
- int ENGINE_register_all_complete(void) { return 1; }
-
- void OPENSSL_load_builtin_modules(void) {}
-
- int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings) {
- CRYPTO_library_init();
- return 1;
- }
|