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Simple HTTP client with HTTP/1.1, HTTP/2, and HTTP/3 support

Security advisory: This version has known vulnerabilities. View advisories
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hackney c_src boringssl crypto rand deterministic.cc
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c_src/boringssl/crypto/rand/deterministic.cc 

// Copyright 2016 The BoringSSL Authors

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.



#include <openssl/rand.h>



#include "../bcm_support.h"

#include "internal.h"



#if defined(OPENSSL_RAND_DETERMINISTIC)



#include <string.h>



#include <openssl/chacha.h>



#include "../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 CRYPTO_MUTEX g_num_calls_lock = CRYPTO_MUTEX_INIT;



void RAND_reset_for_fuzzing(void) { g_num_calls = 0; }



void CRYPTO_init_sysrand(void) {}



void CRYPTO_sysrand(uint8_t *out, size_t requested) {

  static const uint8_t kZeroKey[32] = {0};



  CRYPTO_MUTEX_lock_write(&g_num_calls_lock);

  uint64_t num_calls = g_num_calls++;

  CRYPTO_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);

}



#endif  // OPENSSL_RAND_DETERMINISTIC