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This function has specific code to handle carries and it's not clear how to exercises that code through the modinv function, so well, that's what unit tests are for. Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/**
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* \file bignum_core_invasive.h
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*
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* \brief Function declarations for invasive functions of bignum core.
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*/
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/**
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*/
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#ifndef MBEDTLS_BIGNUM_CORE_INVASIVE_H
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#define MBEDTLS_BIGNUM_CORE_INVASIVE_H
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#include "bignum_core.h"
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#if defined(MBEDTLS_TEST_HOOKS)
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#if !defined(MBEDTLS_THREADING_C)
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extern void (*mbedtls_safe_codepath_hook)(void);
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extern void (*mbedtls_unsafe_codepath_hook)(void);
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#endif /* !MBEDTLS_THREADING_C */
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/** Divide X by 2 mod N in place, assuming N is odd.
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*
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* \param[in,out] X The value to divide by 2 mod \p N.
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* \param[in] N The modulus. Must be odd.
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* \param[in] limbs The number of limbs in \p X and \p N.
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*/
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MBEDTLS_STATIC_TESTABLE
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void mbedtls_mpi_core_div2_mod_odd(mbedtls_mpi_uint *X,
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const mbedtls_mpi_uint *N,
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size_t limbs);
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#endif /* MBEDTLS_TEST_HOOKS */
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#endif /* MBEDTLS_BIGNUM_CORE_INVASIVE_H */
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