--- a/hmac_md5.c
+++ b/hmac_md5.c
@@ -356,10 +356,10 @@ caddr_t         digest;     /* caller digest to be filled in */
      */
 
     /* start out by storing key in pads */
-    bzero(k_ipad, sizeof k_ipad);
-    bzero(k_opad, sizeof k_opad);
-    bcopy(key, k_ipad, key_len);
-    bcopy( key, k_opad, key_len);
+    memset(k_ipad, 0, sizeof k_ipad);
+    memset(k_opad, 0, sizeof k_opad);
+    memcpy(k_ipad, key, key_len);
+    memcpy(k_opad, key, key_len);
 
     /* XOR key with ipad and opad values */
     for(i = 0; i < 64; ++i)
