3387. [func] Support for a DS digest can be disabled at

runtime with disable-ds-digests. [RT #21581]

lib/dns/include/dst/dst.h

@@ -28,6 +28,8 @@
 #include <dns/types.h>
 #include <dns/name.h>
 #include <dns/secalg.h>
+#include <dns/ds.h>
+#include <dns/dsdigest.h>
 
 #include <dst/gssapi.h>
 
@@ -167,6 +169,16 @@ dst_algorithm_supported(unsigned int alg);
  * \li	ISC_FALSE
  */
 
+isc_boolean_t
+dst_ds_digest_supported(unsigned int digest_type);
+/*%<
+ * Checks that a given digest algorithm is supported by DST.
+ *
+ * Returns:
+ * \li	ISC_TRUE
+ * \li	ISC_FALSE
+ */
+
 isc_result_t
 dst_context_create(dst_key_t *key, isc_mem_t *mctx, dst_context_t **dctxp);
 /*%<