blob: 93e2f824bae39625a2b71aad9a0007d1b82fabf6 [file] [log] [blame]
/* 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_MSAN) && !defined(OPENSSL_NO_ASM)
// MSan works by instrumenting memory accesses in the compiler. Accesses from
// uninstrumented code, such as assembly, are invisible to it. MSan will
// incorrectly report reads from assembly-initialized memory as uninitialized.
// If building BoringSSL with MSan, exclude assembly files from the build and
// define OPENSSL_NO_ASM.
//
// This is checked here rather than in a header because the consumer might not
// define OPENSSL_NO_ASM. It is only necessary for BoringSSL source files to be
// built with it.
#error "BoringSSL must be built with assembly disabled to use MSan."
#endif
#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 which) { return OpenSSL_version(which); }
const char *OpenSSL_version(int which) {
switch (which) {
case OPENSSL_VERSION:
return "BoringSSL";
case OPENSSL_CFLAGS:
return "compiler: n/a";
case OPENSSL_BUILT_ON:
return "built on: n/a";
case OPENSSL_PLATFORM:
return "platform: n/a";
case OPENSSL_DIR:
return "OPENSSLDIR: n/a";
default:
return "not available";
}
}
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;
}
void OPENSSL_cleanup(void) {}