105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
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/* MIT License
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*
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* Copyright (c) 2016-2017 INRIA and Microsoft Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "Hacl_Unverified_Random.h"
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#include <stdio.h>
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#if HACL_IS_WINDOWS
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#include <windows.h>
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#include <wincrypt.h>
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#include <malloc.h>
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bool read_random_bytes(uint64_t len, uint8_t * buf) {
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HCRYPTPROV ctxt;
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if (! (CryptAcquireContext(&ctxt, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))) {
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DWORD error = GetLastError();
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printf("Cannot acquire crypto context: 0x%lx\n", error);
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return false;
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}
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bool pass = true;
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if (! (CryptGenRandom(ctxt, len, buf))) {
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printf("Cannot read random bytes\n");
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pass = false;
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}
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CryptReleaseContext(ctxt, 0);
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return pass;
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}
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void * hacl_aligned_malloc(size_t alignment, size_t size) {
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void * res = _aligned_malloc(size, alignment);
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if (res == NULL) {
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printf("Cannot allocate %" PRIu64 " bytes aligned to %" PRIu64 "\n", (uint64_t) size, (uint64_t) alignment);
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}
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return res;
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}
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void hacl_aligned_free(void * ptr) {
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_aligned_free(ptr);
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}
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#else // ! HACL_IS_WINDOWS
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/* assume POSIX here */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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bool read_random_bytes(uint64_t len, uint8_t * buf) {
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int fd = open("/dev/urandom", O_RDONLY);
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if (fd == -1) {
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printf("Cannot open /dev/urandom\n");
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return false;
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}
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bool pass = true;
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uint64_t res = read(fd, buf, len);
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if (res != len) {
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printf("Error on reading, expected %" PRIu64 " bytes, got %" PRIu64 " bytes\n", len, res);
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pass = false;
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}
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close(fd);
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return pass;
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}
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void * hacl_aligned_malloc(size_t alignment, size_t size) {
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void * res = NULL;
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if (posix_memalign(&res, alignment, size)) {
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printf("Cannot allocate %" PRIu64 " bytes aligned to %" PRIu64 "\n", (uint64_t) size, (uint64_t) alignment);
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return NULL;
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}
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return res;
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}
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void hacl_aligned_free(void * ptr) {
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free(ptr);
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}
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#endif // HACL_IS_WINDOWS
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void randombytes(uint8_t * x,uint64_t len) {
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if (! (read_random_bytes(len, x)))
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exit(1);
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}
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