Improve some comments and internal documentation
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index e67c20b..60ba224 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -869,9 +869,11 @@
* max_data_len bytes from \p data.
*
* \param ctx The HMAC context. It must have keys configured
- * with mbedtls_md_hmac_starts(). It is reset using
- * mbedtls_md_hmac_reset() after the computation is
- * complete to prepare for the next computation.
+ * with mbedtls_md_hmac_starts() and use one of the
+ * following hashes: SHA-384, SHA-256, SHA-1 or MD-5.
+ * It is reset using mbedtls_md_hmac_reset() after
+ * the computation is complete to prepare for the
+ * next computation.
* \param add_data The additional data prepended to \p data. This
* must point to a readable buffer of \p add_data_len
* bytes.