Contents

/* Copyright (c) 2016, Google Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

#include <openssl/rand.h>

#if defined(BORINGSSL_UNSAFE_DETERMINISTIC_MODE)

#include <string.h>

#include <openssl/chacha.h>

#include "../internal.h"
#include "../fipsmodule/rand/internal.h"


// g_num_calls is the number of calls to |CRYPTO_sysrand| that have occurred.
//
// This is intentionally not thread-safe. If the fuzzer mode is ever used in a
// multi-threaded program, replace this with a thread-local. (A mutex would not
// be deterministic.)
static uint64_t g_num_calls = 0;
static struct CRYPTO_STATIC_MUTEX g_num_calls_lock = CRYPTO_STATIC_MUTEX_INIT;

void RAND_reset_for_fuzzing(void) { g_num_calls = 0; }

void CRYPTO_sysrand(uint8_t *out, size_t requested) {
  static const uint8_t kZeroKey[32];

  CRYPTO_STATIC_MUTEX_lock_write(&g_num_calls_lock);
  uint64_t num_calls = g_num_calls++;
  CRYPTO_STATIC_MUTEX_unlock_write(&g_num_calls_lock);

  uint8_t nonce[12];
  OPENSSL_memset(nonce, 0, sizeof(nonce));
  OPENSSL_memcpy(nonce, &num_calls, sizeof(num_calls));

  OPENSSL_memset(out, 0, requested);
  CRYPTO_chacha_20(out, out, requested, kZeroKey, nonce, 0);
}

void CRYPTO_sysrand_for_seed(uint8_t *out, size_t requested) {
  CRYPTO_sysrand(out, requested);
}

#endif  // BORINGSSL_UNSAFE_DETERMINISTIC_MODE

Version data entries

54 entries across 54 versions & 4 rubygems

Version	Path
aws-crt-0.1.9	aws-crt-ffi/crt/aws-lc/crypto/rand_extra/deterministic.c
grpc-1.54.3	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.53.2	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.55.3	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.56.2	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
rubypitaya-3.12.5	./lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/grpc-1.50.0-x86_64-linux/third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.56.0	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.56.0.pre3	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.55.0	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.53.1	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.52.2	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.54.2	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.54.0	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
aws-crt-0.1.8	aws-crt-ffi/crt/aws-lc/crypto/rand_extra/deterministic.c
grpc-1.53.0	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.53.0.pre2	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.52.0	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
aws-crt-0.1.7	aws-crt-ffi/crt/aws-lc/crypto/rand_extra/deterministic.c
rubypitaya-3.12.4	./lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/grpc-1.50.0-x86_64-linux/third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c
grpc-1.51.0-x86_64-linux	third_party/boringssl-with-bazel/src/crypto/rand_extra/deterministic.c