1 files changed, 10 insertions, 5 deletions
diff --git a/crypto/dh/dh_lib.c b/crypto/dh/dh_lib.c
index d7fe850f58..29152dca4d 100644
--- a/crypto/dh/dh_lib.c
+++ b/crypto/dh/dh_lib.c
@@ -211,11 +211,16 @@ int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
 
     ffc_params_set0_pqg(&dh->params, p, q, g);
     dh->params.nid = NID_undef;
-    DH_get_nid(dh); /* Check if this is a named group and cache it */
-
-    if (q != NULL)
-        dh->length = BN_num_bits(q);
-
+    /*
+     * Check if this is a named group. If it finds a named group then the
+     * 'q' and 'length' value are either already set or are set by the
+     * call.
+     */
+    if (DH_get_nid(dh) == NID_undef) {
+        /* If its not a named group then set the 'length' if q is not NULL */
+        if (q != NULL)
+            dh->length = BN_num_bits(q);
+    }
     dh->dirty_cnt++;
     return 1;
 }