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