ec978dd812
Fuzzer mode explores the handshake, but at the cost of losing coverage on the record layer. Add a separate build flag and client/server corpora for this mode. Note this requires tweaks in consumers' fuzzer build definitions. BUG=111 Change-Id: I1026dc7301645e165a761068a1daad6eedc9271e Reviewed-on: https://boringssl-review.googlesource.com/12108 Commit-Queue: David Benjamin <davidben@google.com> Reviewed-by: Adam Langley <agl@google.com>
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/* Copyright (c) 2016, 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(BORINGSSL_UNSAFE_DETERMINISTIC_MODE)
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#include <string.h>
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#include <openssl/chacha.h>
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#include "internal.h"
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/* g_num_calls is the number of calls to |CRYPTO_sysrand| that have occured.
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*
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* TODO(davidben): This is intentionally not thread-safe. If the fuzzer mode is
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* ever used in a multi-threaded program, replace this with a thread-local. (A
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* mutex would not be deterministic.) */
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static uint64_t g_num_calls = 0;
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void RAND_reset_for_fuzzing(void) { g_num_calls = 0; }
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void CRYPTO_sysrand(uint8_t *out, size_t requested) {
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static const uint8_t kZeroKey[32];
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uint8_t nonce[12];
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memset(nonce, 0, sizeof(nonce));
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memcpy(nonce, &g_num_calls, sizeof(g_num_calls));
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memset(out, 0, requested);
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CRYPTO_chacha_20(out, out, requested, kZeroKey, nonce, 0);
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g_num_calls++;
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}
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#endif /* BORINGSSL_UNSAFE_DETERMINISTIC_MODE */
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