Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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34 lines
1.3 KiB
34 lines
1.3 KiB
/* Copyright (c) 2020, 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/base.h> |
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#include "../fipsmodule/rand/internal.h" |
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#if defined(BORINGSSL_FIPS) |
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// RAND_need_entropy is called by the FIPS module when it has blocked because of |
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// a lack of entropy. This signal is used as an indication to feed it more. |
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void RAND_need_entropy(size_t bytes_needed) { |
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uint8_t buf[CTR_DRBG_ENTROPY_LEN * BORINGSSL_FIPS_OVERREAD]; |
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size_t todo = sizeof(buf); |
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if (todo > bytes_needed) { |
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todo = bytes_needed; |
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} |
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int used_cpu; |
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CRYPTO_get_seed_entropy(buf, todo, &used_cpu); |
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RAND_load_entropy(buf, todo, used_cpu); |
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} |
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#endif // FIPS
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