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Merge pull request #6230 from tom-cosgrove-arm/issue-6223-core-add

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Bignum: extract core_add from the prototype
This commit is contained in:
Gilles Peskine
2022-10-27 11:25:27 +02:00
committed by GitHub
parent 77e15e8a2c 93003d87a9
commit 9603daddaa
5 changed files with 213 additions and 73 deletions
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19
library/bignum_core.c
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@@ -316,8 +316,6 @@ int mbedtls_mpi_core_write_be( const mbedtls_mpi_uint *X,
return( 0 );
}
void mbedtls_mpi_core_shift_r( mbedtls_mpi_uint *X, size_t limbs,
size_t count )
{
@@ -360,7 +358,24 @@ void mbedtls_mpi_core_shift_r( mbedtls_mpi_uint *X, size_t limbs,
}
}
mbedtls_mpi_uint mbedtls_mpi_core_add( mbedtls_mpi_uint *X,
const mbedtls_mpi_uint *A,
const mbedtls_mpi_uint *B,
size_t limbs )
{
mbedtls_mpi_uint c = 0;
for( size_t i = 0; i < limbs; i++ )
{
mbedtls_mpi_uint t = c + A[i];
c = ( t < A[i] );
t += B[i];
c += ( t < B[i] );
X[i] = t;
}
return( c );
}
mbedtls_mpi_uint mbedtls_mpi_core_add_if( mbedtls_mpi_uint *X,
const mbedtls_mpi_uint *A,