3700778248
MSVC doesn't like |const size_t len| in a function definition where the declaration was just |size_t len| without the |const|. Also, MSVC needs declarations of parameterless functions to have a |void| parameter list. Change-Id: I91e01a12aca657b2ee1d653926f09cc52da2faed Reviewed-on: https://boringssl-review.googlesource.com/4329 Reviewed-by: Adam Langley <agl@google.com>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/* Copyright (c) 2015, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#include <openssl/rand.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/cpu.h>
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#if defined(OPENSSL_X86_64)
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int CRYPTO_have_hwrand(void) {
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return (OPENSSL_ia32cap_P[1] & (1u << 30)) != 0;
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}
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/* CRYPTO_rdrand is defined in asm/rdrand-x86_64.pl */
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extern uint64_t CRYPTO_rdrand(void);
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void CRYPTO_hwrand(uint8_t *buf, size_t len) {
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while (len >= 8) {
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uint64_t rand = CRYPTO_rdrand();
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memcpy(buf, &rand, sizeof(rand));
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len -= sizeof(rand);
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buf += sizeof(rand);
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}
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if (len > 0) {
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uint64_t rand = CRYPTO_rdrand();
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memcpy(buf, &rand, len);
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}
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}
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#else
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int CRYPTO_have_hwrand(void) {
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return 0;
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}
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void CRYPTO_hwrand(uint8_t *buf, size_t len) {
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abort();
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}
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#endif
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