From b5dca87907aadeb1adb7e5bf3063bbde02b2acae Mon Sep 17 00:00:00 2001
From: Raymond Pasco <ray@the.ug>
Date: Mon, 15 Aug 2016 14:00:23 -0400
Subject: [PATCH] Calculate number of blocks from length in CTR mode

---
 arvo/zuse.hoon | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arvo/zuse.hoon b/arvo/zuse.hoon
index 3e82bcfd3..fa5c85342 100644
--- a/arvo/zuse.hoon
+++ b/arvo/zuse.hoon
@@ -436,7 +436,7 @@
       |=  txt/@
       ^-  @ux
       =/  encrypt  ~(en ecba key)
-      =/  blocks  (met 7 txt)
+      =/  blocks  (add (div len 16) ?:(=((mod len 16) 0) 0 1))
       =.  blocks  ?:(=(0 blocks) 1 blocks)
       ?>  (gte len (met 3 txt))
       %+  mix  txt
@@ -458,7 +458,7 @@
       |=  txt/@
       ^-  @ux
       =/  encrypt  ~(en ecbb key)
-      =/  blocks  (met 7 txt)
+      =/  blocks  (add (div len 16) ?:(=((mod len 16) 0) 0 1))
       =.  blocks  ?:(=(0 blocks) 1 blocks)
       ?>  (gte len (met 3 txt))
       %+  mix  txt
@@ -480,7 +480,7 @@
       |=  txt/@
       ^-  @ux
       =/  encrypt  ~(en ecbc key)
-      =/  blocks  (met 7 txt)
+      =/  blocks  (add (div len 16) ?:(=((mod len 16) 0) 0 1))
       =.  blocks  ?:(=(0 blocks) 1 blocks)
       ?>  (gte len (met 3 txt))
       %+  mix  txt