mirror of
https://github.com/googleprojectzero/Jackalope
synced 2026-06-08 14:27:44 +00:00
Ivan Fratric
58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
/*
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Copyright 2020 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#define _CRT_RAND_S
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#define _CRT_SECURE_NO_WARNINGS
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#include <stdio.h>
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#include <string.h>
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#include "common.h"
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#include "prng.h"
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#if defined(WIN32) || defined(_WIN32) || defined(__WIN32)
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#include <windows.h>
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#endif
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int PRNG::SecureRandom(void *data, size_t size) {
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#if defined(WIN32) || defined(_WIN32) || defined(__WIN32)
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uint32_t r;
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size_t remainder = size % 4;
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size_t size4 = size / 4;
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uint32_t *data4 = (uint32_t *)data;
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for (int i = 0; i < size4; i++) {
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rand_s(&data4[i]);
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}
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if (remainder) {
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rand_s(&r);
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memcpy((char *)data + (size4 * 4), &r, remainder);
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}
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#else
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FILE *fp = fopen("/dev/urandom", "rb");
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if (!fp) FATAL("Error opening /dev/urandom");
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if (fread(data, 1, size, fp) != size) {
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FATAL("Error reading /dev/urandom");
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}
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fclose(fp);
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#endif
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return 1;
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}
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