avoid errorneous computation of RSA_PRV_DER_MAX_BYTES if MBEDTLS_MPI_MAX_SIZE is odd.
if MBEDTLS_MPI_MAX_SIZE is odd then RSA_PRV_DER_MAX_BYTES will be two less than expected, since the macros are lacking parentheses.
@@ -504,8 +504,8 @@ int mbedtls_pk_write_key_der( mbedtls_pk_context *key, unsigned char *buf, size_
* otherPrimeInfos OtherPrimeInfos OPTIONAL 0 (not supported)
* }
*/
-#define MPI_MAX_SIZE_2 MBEDTLS_MPI_MAX_SIZE / 2 + \
- MBEDTLS_MPI_MAX_SIZE % 2
+#define MPI_MAX_SIZE_2 ( MBEDTLS_MPI_MAX_SIZE / 2 + \
+ MBEDTLS_MPI_MAX_SIZE % 2 )
#define RSA_PRV_DER_MAX_BYTES 47 + 3 * MBEDTLS_MPI_MAX_SIZE \
+ 5 * MPI_MAX_SIZE_2
