diff options
Diffstat (limited to 'lib/liboqs/src/common/common.c')
| -rw-r--r-- | lib/liboqs/src/common/common.c | 324 |
1 files changed, 0 insertions, 324 deletions
diff --git a/lib/liboqs/src/common/common.c b/lib/liboqs/src/common/common.c deleted file mode 100644 index 43f6b58aa..000000000 --- a/lib/liboqs/src/common/common.c +++ /dev/null @@ -1,324 +0,0 @@ -// SPDX-License-Identifier: Apache-2.0 AND MIT - -#if !defined(_WIN32) && !defined(OQS_HAVE_EXPLICIT_BZERO) -// Request memset_s -#define __STDC_WANT_LIB_EXT1__ 1 -#endif - -#include <oqs/common.h> - -#include <errno.h> -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#if !defined(OQS_HAVE_POSIX_MEMALIGN) || defined(__MINGW32__) || defined(__MINGW64__) || defined(_MSC_VER) -#include <malloc.h> -#endif - -#if defined(_WIN32) -#include <windows.h> -#endif - -/* Identifying the CPU is expensive so we cache the results in cpu_ext_data */ -#if defined(OQS_DIST_BUILD) -static unsigned int cpu_ext_data[OQS_CPU_EXT_COUNT] = {0}; -#endif - -#if defined(OQS_DIST_X86_64_BUILD) -/* set_available_cpu_extensions_x86_64() has been written using: - * https://github.com/google/cpu_features/blob/master/src/cpuinfo_x86.c - */ -#include "x86_64_helpers.h" -static void set_available_cpu_extensions(void) { - /* mark that this function has been called */ - cpu_ext_data[OQS_CPU_EXT_INIT] = 1; - - cpuid_out leaf_1; - cpuid(&leaf_1, 1); - if (leaf_1.eax == 0) { - return; - } - - cpuid_out leaf_7; - cpuid(&leaf_7, 7); - - const unsigned int has_xsave = is_bit_set(leaf_1.ecx, 26); - const unsigned int has_osxsave = is_bit_set(leaf_1.ecx, 27); - const uint32_t xcr0_eax = (has_xsave && has_osxsave) ? xgetbv_eax(0) : 0; - - cpu_ext_data[OQS_CPU_EXT_AES] = is_bit_set(leaf_1.ecx, 25); - if (has_mask(xcr0_eax, MASK_XMM | MASK_YMM)) { - cpu_ext_data[OQS_CPU_EXT_AVX] = is_bit_set(leaf_1.ecx, 28); - cpu_ext_data[OQS_CPU_EXT_AVX2] = is_bit_set(leaf_7.ebx, 5); - } - cpu_ext_data[OQS_CPU_EXT_PCLMULQDQ] = is_bit_set(leaf_1.ecx, 1); - cpu_ext_data[OQS_CPU_EXT_POPCNT] = is_bit_set(leaf_1.ecx, 23); - cpu_ext_data[OQS_CPU_EXT_BMI1] = is_bit_set(leaf_7.ebx, 3); - cpu_ext_data[OQS_CPU_EXT_BMI2] = is_bit_set(leaf_7.ebx, 8); - cpu_ext_data[OQS_CPU_EXT_ADX] = is_bit_set(leaf_7.ebx, 19); - - if (has_mask(xcr0_eax, MASK_XMM)) { - cpu_ext_data[OQS_CPU_EXT_SSE] = is_bit_set(leaf_1.edx, 25); - cpu_ext_data[OQS_CPU_EXT_SSE2] = is_bit_set(leaf_1.edx, 26); - cpu_ext_data[OQS_CPU_EXT_SSE3] = is_bit_set(leaf_1.ecx, 0); - } - - if (has_mask(xcr0_eax, MASK_XMM | MASK_YMM | MASK_MASKREG | MASK_ZMM0_15 | MASK_ZMM16_31)) { - unsigned int avx512f = is_bit_set(leaf_7.ebx, 16); - unsigned int avx512bw = is_bit_set(leaf_7.ebx, 30); - unsigned int avx512dq = is_bit_set(leaf_7.ebx, 17); - if (avx512f && avx512bw && avx512dq) { - cpu_ext_data[OQS_CPU_EXT_AVX512] = 1; - } - cpu_ext_data[OQS_CPU_EXT_VPCLMULQDQ] = is_bit_set(leaf_7.ecx, 10); - } -} -#elif defined(OQS_DIST_X86_BUILD) -static void set_available_cpu_extensions(void) { - /* mark that this function has been called */ - cpu_ext_data[OQS_CPU_EXT_INIT] = 1; -} -#elif defined(OQS_DIST_ARM64_V8_BUILD) -#if defined(__APPLE__) -#include <sys/sysctl.h> -static unsigned int macos_feature_detection(const char *feature_name) { - int p; - size_t p_len = sizeof(p); - int res = sysctlbyname(feature_name, &p, &p_len, NULL, 0); - if (res != 0) { - return 0; - } else { - return (p != 0) ? 1 : 0; - } -} -static void set_available_cpu_extensions(void) { - /* mark that this function has been called */ - cpu_ext_data[OQS_CPU_EXT_ARM_AES] = 1; - cpu_ext_data[OQS_CPU_EXT_ARM_SHA2] = 1; - cpu_ext_data[OQS_CPU_EXT_ARM_SHA3] = macos_feature_detection("hw.optional.armv8_2_sha3"); - cpu_ext_data[OQS_CPU_EXT_ARM_NEON] = macos_feature_detection("hw.optional.neon"); - cpu_ext_data[OQS_CPU_EXT_INIT] = 1; -} -#elif defined(__FreeBSD__) || defined(__FreeBSD) -#include <sys/auxv.h> -#include <machine/elf.h> - -static void set_available_cpu_extensions(void) { - /* mark that this function has been called */ - u_long hwcaps = 0; - cpu_ext_data[OQS_CPU_EXT_INIT] = 1; - if (elf_aux_info(AT_HWCAP, &hwcaps, sizeof(u_long))) { - fprintf(stderr, "Error getting HWCAP for ARM on FreeBSD\n"); - return; - } - if (hwcaps & HWCAP_AES) { - cpu_ext_data[OQS_CPU_EXT_ARM_AES] = 1; - } - if (hwcaps & HWCAP_ASIMD) { - cpu_ext_data[OQS_CPU_EXT_ARM_NEON] = 1; - } - if (hwcaps & HWCAP_SHA2) { - cpu_ext_data[OQS_CPU_EXT_ARM_SHA2] = 1; - } - if (hwcaps & HWCAP_SHA3) { - cpu_ext_data[OQS_CPU_EXT_ARM_SHA3] = 1; - } -} -#else -#include <sys/auxv.h> -#include <asm/hwcap.h> -static void set_available_cpu_extensions(void) { - /* mark that this function has been called */ - cpu_ext_data[OQS_CPU_EXT_INIT] = 1; - unsigned long int hwcaps = getauxval(AT_HWCAP); - if (hwcaps & HWCAP_AES) { - cpu_ext_data[OQS_CPU_EXT_ARM_AES] = 1; - } - if (hwcaps & HWCAP_SHA2) { - cpu_ext_data[OQS_CPU_EXT_ARM_SHA2] = 1; - } - if (hwcaps & HWCAP_SHA3) { - cpu_ext_data[OQS_CPU_EXT_ARM_SHA3] = 1; - } - if (hwcaps & HWCAP_ASIMD) { - cpu_ext_data[OQS_CPU_EXT_ARM_NEON] = 1; - } -} -#endif -#elif defined(OQS_DIST_ARM32v7_BUILD) -#include <sys/auxv.h> -#include <asm/hwcap.h> -static void set_available_cpu_extensions(void) { - /* mark that this function has been called */ - cpu_ext_data[OQS_CPU_EXT_INIT] = 1; - unsigned long int hwcaps = getauxval(AT_HWCAP); - unsigned long int hwcaps2 = getauxval(AT_HWCAP2); - if (hwcaps2 & HWCAP2_AES) { - cpu_ext_data[OQS_CPU_EXT_ARM_AES] = 1; - } - if (hwcaps2 & HWCAP2_SHA2) { - cpu_ext_data[OQS_CPU_EXT_ARM_SHA2] = 1; - } - if (hwcaps & HWCAP_NEON) { - cpu_ext_data[OQS_CPU_EXT_ARM_NEON] = 1; - } -} -#elif defined(OQS_DIST_PPC64LE_BUILD) -static void set_available_cpu_extensions(void) { - /* mark that this function has been called */ - cpu_ext_data[OQS_CPU_EXT_INIT] = 1; -} -#elif defined(OQS_DIST_S390X_BUILD) -static void set_available_cpu_extensions(void) { - /* mark that this function has been called */ - cpu_ext_data[OQS_CPU_EXT_INIT] = 1; -} -#elif defined(OQS_DIST_BUILD) -static void set_available_cpu_extensions(void) { -} -#endif - -OQS_API int OQS_CPU_has_extension(OQS_CPU_EXT ext) { -#if defined(OQS_DIST_BUILD) - if (0 == cpu_ext_data[OQS_CPU_EXT_INIT]) { - set_available_cpu_extensions(); - } - if (0 < ext && ext < OQS_CPU_EXT_COUNT) { - return (int)cpu_ext_data[ext]; - } -#else - (void)ext; -#endif - return 0; -} - -OQS_API void OQS_init(void) { -#if defined(OQS_DIST_BUILD) - OQS_CPU_has_extension(OQS_CPU_EXT_INIT); -#endif - return; -} - -OQS_API const char *OQS_version(void) { - return OQS_VERSION_TEXT; -} - -OQS_API int OQS_MEM_secure_bcmp(const void *a, const void *b, size_t len) { - /* Assume CHAR_BIT = 8 */ - uint8_t r = 0; - - for (size_t i = 0; i < len; i++) { - r |= ((const uint8_t *)a)[i] ^ ((const uint8_t *)b)[i]; - } - - // We have 0 <= r < 256, and unsigned int is at least 16 bits. - return 1 & ((-(unsigned int)r) >> 8); -} - -OQS_API void OQS_MEM_cleanse(void *ptr, size_t len) { -#if defined(_WIN32) - SecureZeroMemory(ptr, len); -#elif defined(OQS_HAVE_EXPLICIT_BZERO) - explicit_bzero(ptr, len); -#elif defined(__STDC_LIB_EXT1__) || defined(OQS_HAVE_MEMSET_S) - if (0U < len && memset_s(ptr, (rsize_t)len, 0, (rsize_t)len) != 0) { - abort(); - } -#else - typedef void *(*memset_t)(void *, int, size_t); - static volatile memset_t memset_func = memset; - memset_func(ptr, 0, len); -#endif -} - -OQS_API void OQS_MEM_secure_free(void *ptr, size_t len) { - if (ptr != NULL) { - OQS_MEM_cleanse(ptr, len); - free(ptr); // IGNORE free-check - } -} - -OQS_API void OQS_MEM_insecure_free(void *ptr) { - free(ptr); // IGNORE free-check -} - -void *OQS_MEM_aligned_alloc(size_t alignment, size_t size) { -#if defined(OQS_HAVE_ALIGNED_ALLOC) // glibc and other implementations providing aligned_alloc - return aligned_alloc(alignment, size); -#else - // Check alignment (power of 2, and >= sizeof(void*)) and size (multiple of alignment) - if (alignment & (alignment - 1) || size & (alignment - 1) || alignment < sizeof(void *)) { - errno = EINVAL; - return NULL; - } - -#if defined(OQS_HAVE_POSIX_MEMALIGN) - void *ptr = NULL; - const int err = posix_memalign(&ptr, alignment, size); - if (err) { - errno = err; - ptr = NULL; - } - return ptr; -#elif defined(OQS_HAVE_MEMALIGN) - return memalign(alignment, size); -#elif defined(__MINGW32__) || defined(__MINGW64__) - return __mingw_aligned_malloc(size, alignment); -#elif defined(_MSC_VER) - return _aligned_malloc(size, alignment); -#else - if (!size) { - return NULL; - } - // Overallocate to be able to align the pointer (alignment -1) and to store - // the difference between the pointer returned to the user (ptr) and the - // pointer returned by malloc (buffer). The difference is caped to 255 and - // can be made larger if necessary, but this should be enough for all users - // in liboqs. - // - // buffer ptr - // ↓ ↓ - // ...........|................... - // | - // diff = ptr - buffer - const size_t offset = alignment - 1 + sizeof(uint8_t); - uint8_t *buffer = malloc(size + offset); - if (!buffer) { - return NULL; - } - - // Align the pointer returned to the user. - uint8_t *ptr = (uint8_t *)(((uintptr_t)(buffer) + offset) & ~(alignment - 1)); - ptrdiff_t diff = ptr - buffer; - if (diff > UINT8_MAX) { - // This should never happen in our code, but just to be safe - free(buffer); // IGNORE free-check - errno = EINVAL; - return NULL; - } - // Store the difference one byte ahead the returned poitner so that free - // can reconstruct buffer. - ptr[-1] = diff; - return ptr; -#endif -#endif -} - -void OQS_MEM_aligned_free(void *ptr) { -#if defined(OQS_HAVE_ALIGNED_ALLOC) || defined(OQS_HAVE_POSIX_MEMALIGN) || defined(OQS_HAVE_MEMALIGN) - free(ptr); // IGNORE free-check -#elif defined(__MINGW32__) || defined(__MINGW64__) - __mingw_aligned_free(ptr); -#elif defined(_MSC_VER) - _aligned_free(ptr); -#else - if (ptr) { - // Reconstruct the pointer returned from malloc using the difference - // stored one byte ahead of ptr. - uint8_t *u8ptr = ptr; - free(u8ptr - u8ptr[-1]); // IGNORE free-check - } -#endif -} |