Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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77 lines
3.0 KiB
77 lines
3.0 KiB
3 years ago
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/* Copyright (c) 2022, 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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#ifndef OPENSSL_HEADER_CTRDRBG_H
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#define OPENSSL_HEADER_CTRDRBG_H
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#include <openssl/base.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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// FIPS pseudo-random number generator.
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// CTR-DRBG state objects.
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//
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// CTR_DRBG_STATE contains the state of a FIPS AES-CTR-based pseudo-random
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// number generator. If BoringSSL was built in FIPS mode then this is a FIPS
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// Approved algorithm.
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// CTR_DRBG_ENTROPY_LEN is the number of bytes of input entropy. See SP
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// 800-90Ar1, table 3.
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#define CTR_DRBG_ENTROPY_LEN 48
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// CTR_DRBG_MAX_GENERATE_LENGTH is the maximum number of bytes that can be
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// generated in a single call to |CTR_DRBG_generate|.
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#define CTR_DRBG_MAX_GENERATE_LENGTH 65536
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// CTR_DRBG_new returns an initialized |CTR_DRBG_STATE|, or NULL if either
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// allocation failed or if |personalization_len| is invalid.
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OPENSSL_EXPORT CTR_DRBG_STATE *CTR_DRBG_new(
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const uint8_t entropy[CTR_DRBG_ENTROPY_LEN], const uint8_t *personalization,
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size_t personalization_len);
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// CTR_DRBG_free frees |state| if non-NULL, or else does nothing.
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OPENSSL_EXPORT void CTR_DRBG_free(CTR_DRBG_STATE* state);
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// CTR_DRBG_reseed reseeds |drbg| given |CTR_DRBG_ENTROPY_LEN| bytes of entropy
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// in |entropy| and, optionally, up to |CTR_DRBG_ENTROPY_LEN| bytes of
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// additional data. It returns one on success or zero on error.
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OPENSSL_EXPORT int CTR_DRBG_reseed(CTR_DRBG_STATE *drbg,
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const uint8_t entropy[CTR_DRBG_ENTROPY_LEN],
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const uint8_t *additional_data,
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size_t additional_data_len);
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// CTR_DRBG_generate processes to up |CTR_DRBG_ENTROPY_LEN| bytes of additional
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// data (if any) and then writes |out_len| random bytes to |out|, where
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// |out_len| <= |CTR_DRBG_MAX_GENERATE_LENGTH|. It returns one on success or
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// zero on error.
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OPENSSL_EXPORT int CTR_DRBG_generate(CTR_DRBG_STATE *drbg, uint8_t *out,
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size_t out_len,
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const uint8_t *additional_data,
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size_t additional_data_len);
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// CTR_DRBG_clear zeroises the state of |drbg|.
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OPENSSL_EXPORT void CTR_DRBG_clear(CTR_DRBG_STATE *drbg);
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#if defined(__cplusplus)
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} // extern C
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#endif
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#endif // OPENSSL_HEADER_CTRDRBG_H
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