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Move some bignum functions out of constant_time module

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-05-09 14:01:05 +01:00
parent 19e8cd06fe
commit 7d4f019810
5 changed files with 194 additions and 203 deletions
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18
library/constant_time_internal.h
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@ -129,24 +129,6 @@ unsigned mbedtls_ct_size_bool_eq(size_t x,
unsigned mbedtls_ct_mpi_uint_lt(const mbedtls_mpi_uint x,
const mbedtls_mpi_uint y);
/**
* \brief Check if one unsigned MPI is less than another in constant
* time.
*
* \param A The left-hand MPI. This must point to an array of limbs
* with the same allocated length as \p B.
* \param B The right-hand MPI. This must point to an array of limbs
* with the same allocated length as \p A.
* \param limbs The number of limbs in \p A and \p B.
* This must not be 0.
*
* \return The result of the comparison:
* \c 1 if \p A is less than \p B.
* \c 0 if \p A is greater than or equal to \p B.
*/
unsigned mbedtls_mpi_core_lt_ct(const mbedtls_mpi_uint *A,
const mbedtls_mpi_uint *B,
size_t limbs);
#endif /* MBEDTLS_BIGNUM_C */
/** Choose between two integer values without branches.