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
1.7 KiB
C
57 lines
1.7 KiB
C
/* Copyright (c) 2014, 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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#if defined(OPENSSL_WINDOWS)
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#include <limits.h>
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#include <stdlib.h>
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#pragma warning(push, 3)
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#include <windows.h>
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/* #define needed to link in RtlGenRandom(), a.k.a. SystemFunction036. See the
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* "Community Additions" comment on MSDN here:
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* http://msdn.microsoft.com/en-us/library/windows/desktop/aa387694.aspx */
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#define SystemFunction036 NTAPI SystemFunction036
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#include <NTSecAPI.h>
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#undef SystemFunction036
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#pragma warning(pop)
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#include "internal.h"
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void RAND_cleanup(void) {
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}
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void CRYPTO_sysrand(uint8_t *out, size_t requested) {
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while (requested > 0) {
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ULONG output_bytes_this_pass = ULONG_MAX;
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if (requested < output_bytes_this_pass) {
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output_bytes_this_pass = requested;
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}
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if (RtlGenRandom(out, output_bytes_this_pass) == FALSE) {
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abort();
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}
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requested -= output_bytes_this_pass;
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out += output_bytes_this_pass;
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}
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return;
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}
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#endif /* OPENSSL_WINDOWS */
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