EVP_PKEY_CTX_add1_hkdf_info() no longer works with providers that do not expose gettable parameters in ossl_kdf_hkdf_keyexch_functions array about openssl HOT 3 CLOSED

--- a/crypto/evp/pmeth_lib.c
+++ b/crypto/evp/pmeth_lib.c
@@ -1061,8 +1061,13 @@ static int evp_pkey_ctx_add1_octet_string(EVP_PKEY_CTX *ctx, int fallback,
     os_params[0] = OSSL_PARAM_construct_octet_string(param, NULL, 0);
     os_params[1] = OSSL_PARAM_construct_end();
 
-    if (!EVP_PKEY_CTX_get_params(ctx, os_params))
+    if (!EVP_PKEY_CTX_get_params(ctx, os_params)) {
+        if (EVP_PKEY_CTX_gettable_params(ctx) == NULL) {
+            /* Older provider that doesn't support gettable parameters */
+            return evp_pkey_ctx_set1_octet_string(ctx, fallback, param, op, ctrl, data, datalen);
+        }
         return 0;
+    }
 
     /* Older provider that doesn't support getting this parameter */
     if (os_params[0].return_size == OSSL_PARAM_UNMODIFIED)