Fixed TSIG algorithm bug.

Signed-off-by: Marek Vavrusa <marek.vavrusa@nic.cz>

src/libknot/tsig.c

@@ -546,6 +546,8 @@ uint16_t tsig_alg_digest_length(tsig_algorithm_t alg)
 		case KNOT_TSIG_ALG_HMAC_SHA224:
 			return KNOT_TSIG_ALG_DIG_LENGTH_SHA224;
 		case KNOT_TSIG_ALG_HMAC_SHA256:
+			return KNOT_TSIG_ALG_DIG_LENGTH_SHA256;
+		case KNOT_TSIG_ALG_HMAC_SHA384:
 			return KNOT_TSIG_ALG_DIG_LENGTH_SHA384;
 		case KNOT_TSIG_ALG_HMAC_SHA512:
 			return KNOT_TSIG_ALG_DIG_LENGTH_SHA512;