mirror of
https://github.com/wolfSSL/wolfssl.git
synced 2026-07-08 06:40:48 +02:00
JacobBarthelmeh
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* wolfentropy.h
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*
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* Copyright (C) 2006-2026 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifndef WOLFENTROPY_H
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#define WOLFENTROPY_H
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#include <wolfssl/wolfcrypt/types.h>
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#ifdef HAVE_ENTROPY_MEMUSE
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#if defined(ENTROPY_SCALE_FACTOR) && FIPS_VERSION3_GE(5,2,4) && \
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FIPS_VERSION3_NE(6,0,0)
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#error "ENTROPY_SCALE_FACTOR defined elsewhere than wolfEntropy.h"
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#endif
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#if FIPS_VERSION3_GE(5,2,4) && FIPS_VERSION3_NE(6,0,0)
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/* Do not allow default fallback to /dev/urandom when in FIPS mode that
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* supports ESV */
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#define ENTROPY_MEMUSE_FORCE_FAILURE
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#endif
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#ifndef ENTROPY_SCALE_FACTOR
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/* The entropy scale factor should be the whole number inverse of the
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* minimum bits of entropy per bit of NDRNG output. */
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/* Full strength, conditioned entropy is requested of MemUse Entropy. */
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#if defined(HAVE_FIPS) && defined(HAVE_FIPS_VERSION) && \
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(HAVE_FIPS_VERSION >= 2)
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#define ENTROPY_SCALE_FACTOR (4)
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#else
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#define ENTROPY_SCALE_FACTOR (1)
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#endif
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Maximum entropy bits that can be produced. */
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#define MAX_ENTROPY_BITS 256
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/* For generating data for assessment. */
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WOLFSSL_API int wc_Entropy_GetRawEntropy(unsigned char* raw, int cnt);
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WOLFSSL_API int wc_Entropy_Get(int bits, unsigned char* entropy, word32 len);
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WOLFSSL_API int wc_Entropy_OnDemandTest(void);
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WOLFSSL_LOCAL int Entropy_Init(void);
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WOLFSSL_LOCAL void Entropy_Final(void);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* HAVE_ENTROPY_MEMUSE */
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#endif /* WOLFENTROPY_H */
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