310d4dd6b6
Pure /dev/urandom, no buffering (previous behaviour): Did 2320000 RNG (16 bytes) operations in 3000082us (773312.2 ops/sec): 12.4 MB/s Did 209000 RNG (256 bytes) operations in 3011984us (69389.5 ops/sec): 17.8 MB/s Did 6851 RNG (8192 bytes) operations in 3052027us (2244.7 ops/sec): 18.4 MB/s Pure rdrand speed: Did 34930500 RNG (16 bytes) operations in 3000021us (11643418.5 ops/sec): 186.3 MB/s Did 2444000 RNG (256 bytes) operations in 3000164us (814622.1 ops/sec): 208.5 MB/s Did 80000 RNG (8192 bytes) operations in 3020968us (26481.6 ops/sec): 216.9 MB/s rdrand + ChaCha (as in this change): Did 19498000 RNG (16 bytes) operations in 3000086us (6499147.0 ops/sec): 104.0 MB/s Did 1964000 RNG (256 bytes) operations in 3000566us (654543.2 ops/sec): 167.6 MB/s Did 62000 RNG (8192 bytes) operations in 3034090us (20434.5 ops/sec): 167.4 MB/s Change-Id: Ie17045650cfe75858e4498ac28dbc4dcf8338376 Reviewed-on: https://boringssl-review.googlesource.com/4328 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();
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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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