1 files changed, 14 insertions, 7 deletions
diff --git a/lib/lanplus/lanplus_crypt_impl.c b/lib/lanplus/lanplus_crypt_impl.c
index 3f9679e..d12ad9c 100644
--- a/lib/lanplus/lanplus_crypt_impl.c
+++ b/lib/lanplus/lanplus_crypt_impl.c
@@ -61,13 +61,20 @@ int lanplus_seed_prng(uint32_t bytes)
         static FILE *fp = NULL;
         size_t i;
         randfile = RAND_file_name(buffer, sizeof buffer); /* usu C:\.rnd */
-	if ((randfile != NULL) && (fp == NULL)) {  
-	   /*first time, so open/create file*/
-           fp = fopen(randfile,"w");  /*create the randfile*/
-           if (fp != NULL) {
-               i = fwrite(" \n",2,1,fp);
-               fclose(fp);
-           }
+        if ((randfile != NULL) && (fp == NULL)) {  
+		   fp = fopen(randfile,"r");  /*check the randfile*/
+           if (fp == NULL) {   /*does not exist, create it*/
+	   	      /*first time, so open/create file*/
+              fp = fopen(randfile,"w");  /*create the randfile*/
+              if (fp != NULL) {
+				i = fwrite(" \n",2,1,fp);
+				fclose(fp);
+              } else {
+                printf("seed_prng: cannot create %s file\n",randfile);
+			  }
+           } else { /*file opened, so close it*/
+		      fclose(fp);
+		   }
         }
         if (verbose > 0)
             printf("seed_prng: RAND_file_name = %s, fp=%p\n",randfile,fp);