Implement mbedtls_mpi_mod_sub()
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/library/bignum_mod.c b/library/bignum_mod.c
index 7a5539d..7cf2fb2 100644
--- a/library/bignum_mod.c
+++ b/library/bignum_mod.c
@@ -179,7 +179,18 @@
/* END MERGE SLOT 2 */
/* BEGIN MERGE SLOT 3 */
+int mbedtls_mpi_mod_sub( mbedtls_mpi_mod_residue *X,
+ const mbedtls_mpi_mod_residue *A,
+ const mbedtls_mpi_mod_residue *B,
+ const mbedtls_mpi_mod_modulus *N )
+{
+ if( X->limbs != N->limbs || A->limbs != N->limbs || B->limbs != N->limbs )
+ return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
+ mbedtls_mpi_mod_raw_sub( X->p, A->p, B->p, N );
+
+ return( 0 );
+}
/* END MERGE SLOT 3 */
/* BEGIN MERGE SLOT 4 */