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-rw-r--r--contrib/unbound/services/authzone.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/contrib/unbound/services/authzone.h b/contrib/unbound/services/authzone.h
index d24e569d3b85..07614ed82963 100644
--- a/contrib/unbound/services/authzone.h
+++ b/contrib/unbound/services/authzone.h
@@ -747,6 +747,9 @@ int zonemd_scheme_supported(int scheme);
* @param region: temp region for allocs during canonicalisation.
* @param buf: temp buffer during canonicalisation.
* @param reason: string returned with failure reason.
+ * If the hash cannot be checked, but it is allowed, for unknown
+ * algorithms, the routine returns success, and the reason is nonNULL,
+ * with the allowance reason.
* @return false on failure.
*/
int auth_zone_generate_zonemd_check(struct auth_zone* z, int scheme,