Avoid in-out length in dhm_calc_secret()
diff --git a/include/mbedtls/dhm.h b/include/mbedtls/dhm.h
index 83aad1e..10fda5b 100644
--- a/include/mbedtls/dhm.h
+++ b/include/mbedtls/dhm.h
@@ -241,8 +241,8 @@
*
* \param ctx DHM context
* \param output destination buffer
- * \param olen on entry, must hold the size of the destination buffer
- * on exit, holds the actual number of bytes written
+ * \param output_size size of the destination buffer
+ * \param olen on exit, holds the actual number of bytes written
* \param f_rng RNG function, for blinding purposes
* \param p_rng RNG parameter
*
@@ -255,7 +255,7 @@
* to always pass a non-NULL f_rng argument.
*/
int mbedtls_dhm_calc_secret( mbedtls_dhm_context *ctx,
- unsigned char *output, size_t *olen,
+ unsigned char *output, size_t output_size, size_t *olen,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng );