1 files changed, 16 insertions, 0 deletions
diff --git a/ssl/internal.h b/ssl/internal.h
index 232364ee..fca2dda7 100644
--- a/ssl/internal.h
+++ b/ssl/internal.h
@@ -1014,6 +1014,22 @@ int ssl_client_cipher_list_contains_cipher(
     const struct ssl_early_callback_ctx *client_hello, uint16_t id);
 
 
+/* GREASE. */
+
+enum ssl_grease_index_t {
+  ssl_grease_cipher = 0,
+  ssl_grease_group,
+  ssl_grease_extension1,
+  ssl_grease_extension2,
+};
+
+/* ssl_get_grease_value returns a GREASE value for |ssl|. For a given
+ * connection, the values for each index will be deterministic. This allows the
+ * same ClientHello be sent twice for a HelloRetryRequest or the same group be
+ * advertised in both supported_groups and key_shares. */
+uint16_t ssl_get_grease_value(const SSL *ssl, enum ssl_grease_index_t index);
+
+
 /* Underdocumented functions.
  *
  * Functions below here haven't been touched up and may be underdocumented. */