ref: bfe9da47cfa2f51ebef78c59332b5ba2deba306d
dir: /third_party/boringssl/src/crypto/crypto.c/
/* 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 "fipsmodule/rand/fork_detect.h"
#include "fipsmodule/rand/internal.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 // !NO_ASM && !STATIC_ARMCAP &&
// (X86 || X86_64 || ARM || AARCH64 || PPC64LE)
// 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(BORINGSSL_DISPATCH_TEST)
// 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 uint8_t BORINGSSL_function_hit[7] = {0};
#endif
#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
// This value must be explicitly initialized to zero. See similar comment above.
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__) || 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;
uint32_t *OPENSSL_get_armcap_pointer_for_test(void) {
return &OPENSSL_armcap_P;
}
#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
}
void CRYPTO_pre_sandbox_init(void) {
// Read from /proc/cpuinfo if needed.
CRYPTO_library_init();
// Open /dev/urandom if needed.
CRYPTO_init_sysrand();
// Set up MADV_WIPEONFORK state if needed.
CRYPTO_get_fork_generation();
}
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) {}