mbedtls_ecp_write_key_ext(): recommend over the old function in documentation
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index b46d6c3..58fc5e5 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -1338,6 +1338,8 @@
* checking that the output buffer is large enough.
* See the description of the \p buflen parameter for
* how to calculate the nominal length.
+ * To avoid this difficulty, use mbedtls_ecp_write_key_ext()
+ * instead.
*
* \note If the private key was not set in \p key,
* the output is unspecified. Future versions