1 files changed, 6 insertions, 0 deletions
diff --git a/apps/dsaparam.c b/apps/dsaparam.c
index 341480b818..8e33ffd6b0 100644
--- a/apps/dsaparam.c
+++ b/apps/dsaparam.c
@@ -128,6 +128,12 @@ int dsaparam_main(int argc, char **argv)
         goto end;
 
     if (numbits > 0) {
+        if (numbits > OPENSSL_DSA_MAX_MODULUS_BITS)
+            BIO_printf(bio_err,
+                       "Warning: It is not recommended to use more than %d bit for DSA keys.\n"
+                       "         Your key size is %d! Larger key size may behave not as expected.\n",
+                       OPENSSL_DSA_MAX_MODULUS_BITS, numbits);
+
         cb = BN_GENCB_new();
         if (cb == NULL) {
             BIO_printf(bio_err, "Error allocating BN_GENCB object\n");