64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
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/*
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* Copyright 2013-2022 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2012, Intel Corporation. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*
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* Originally written by Shay Gueron (1, 2), and Vlad Krasnov (1)
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* (1) Intel Corporation, Israel Development Center, Haifa, Israel
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* (2) University of Haifa, Israel
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*/
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#ifndef OSSL_CRYPTO_BN_RSAZ_EXP_H
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# define OSSL_CRYPTO_BN_RSAZ_EXP_H
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# undef RSAZ_ENABLED
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# if defined(OPENSSL_BN_ASM_MONT) && \
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(defined(__x86_64) || defined(__x86_64__) || \
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defined(_M_AMD64) || defined(_M_X64))
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# define RSAZ_ENABLED
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# include <openssl/bn.h>
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# include "internal/constant_time.h"
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# include "bn_local.h"
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void RSAZ_1024_mod_exp_avx2(BN_ULONG result[16],
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const BN_ULONG base_norm[16],
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const BN_ULONG exponent[16],
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const BN_ULONG m_norm[16], const BN_ULONG RR[16],
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BN_ULONG k0);
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int rsaz_avx2_eligible(void);
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void RSAZ_512_mod_exp(BN_ULONG result[8],
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const BN_ULONG base_norm[8], const BN_ULONG exponent[8],
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const BN_ULONG m_norm[8], BN_ULONG k0,
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const BN_ULONG RR[8]);
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static ossl_inline void bn_select_words(BN_ULONG *r, BN_ULONG mask,
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const BN_ULONG *a,
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const BN_ULONG *b, size_t num)
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{
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size_t i;
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for (i = 0; i < num; i++) {
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r[i] = constant_time_select_64(mask, a[i], b[i]);
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}
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}
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static ossl_inline BN_ULONG bn_reduce_once_in_place(BN_ULONG *r,
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BN_ULONG carry,
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const BN_ULONG *m,
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BN_ULONG *tmp, size_t num)
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{
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carry -= bn_sub_words(tmp, r, m, num);
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bn_select_words(r, carry, r /* tmp < 0 */, tmp /* tmp >= 0 */, num);
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return carry;
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}
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# endif
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#endif
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