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/* 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 <assert.h>
#include <stdio.h>
#include "fipsmodule/rand/internal.h"
#include "bcm_support.h"
#include "internal.h"
static_assert(sizeof(ossl_ssize_t) == sizeof(size_t),
"ossl_ssize_t should be the same size as size_t");
// 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};
uint32_t OPENSSL_get_ia32cap(int idx) {
OPENSSL_init_cpuid();
return OPENSSL_ia32cap_P[idx];
}
#elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
#include <openssl/arm_arch.h>
#if defined(OPENSSL_STATIC_ARMCAP)
// See ARM ACLE for the definitions of these macros. Note |__ARM_FEATURE_AES|
// covers both AES and PMULL and |__ARM_FEATURE_SHA2| covers SHA-1 and SHA-256.
// https://developer.arm.com/architectures/system-architectures/software-standards/acle
// https://github.com/ARM-software/acle/issues/152
//
// TODO(davidben): Do we still need |OPENSSL_STATIC_ARMCAP_*| or are the
// standard flags and -march sufficient?
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_AES)
ARMV8_AES |
#endif
#if defined(OPENSSL_STATIC_ARMCAP_PMULL) || defined(__ARM_FEATURE_AES)
ARMV8_PMULL |
#endif
#if defined(OPENSSL_STATIC_ARMCAP_SHA1) || defined(__ARM_FEATURE_SHA2)
ARMV8_SHA1 |
#endif
#if defined(OPENSSL_STATIC_ARMCAP_SHA256) || defined(__ARM_FEATURE_SHA2)
ARMV8_SHA256 |
#endif
#if defined(__ARM_FEATURE_SHA512)
ARMV8_SHA512 |
#endif
0;
#else
HIDDEN uint32_t OPENSSL_armcap_P = 0;
uint32_t *OPENSSL_get_armcap_pointer_for_test(void) {
OPENSSL_init_cpuid();
return &OPENSSL_armcap_P;
}
#endif
uint32_t OPENSSL_get_armcap(void) {
OPENSSL_init_cpuid();
return OPENSSL_armcap_P;
}
#endif
#if defined(NEED_CPUID)
static CRYPTO_once_t once = CRYPTO_ONCE_INIT;
void OPENSSL_init_cpuid(void) { CRYPTO_once(&once, OPENSSL_cpuid_setup); }
#endif
void CRYPTO_library_init(void) {}
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.
OPENSSL_init_cpuid();
// 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) {
return 1;
}
void OPENSSL_cleanup(void) {}
FILE *CRYPTO_get_stderr(void) { return stderr; }