server/, keys/: Alternative serialization formats for hashing.

[tripe] / keys / tripe-keys.in

diff --git a/keys/tripe-keys.in b/keys/tripe-keys.in
index 787336fa7cc24b3191b01f1464b03db5a3268b23..81d2ff707a38243fca6ff9b555579dbe62e5bcf5 100644 (file)
--- a/keys/tripe-keys.in
+++ b/keys/tripe-keys.in
@@ -244,9 +244,10 @@ def conf_defaults():
                                             'ec': 'ec-param'}[conf['kx']]),
                ('kx-param', lambda: {'dh': '-LS -b3072 -B256',
                                      'ec': '-Cnist-p256'}[conf['kx']]),
-               ('kx-attrs', ''),
+               ('kx-attrs', 'serialization=constlen'),
                ('kx-expire', 'now + 1 year'),
                ('kx-warn-days', '28'),
+               ('bulk', 'iiv'),
                ('cipher', 'rijndael-cbc'),
                ('hash', 'sha256'),
                ('master-keygen-flags', '-l'),
@@ -378,7 +379,7 @@ def cmd_setup(args):
     -a${kx-param-genalg} !${kx-param}
     -eforever -tparam tripe-param
     kx-group=${kx} mgf=${mgf} mac=${mac}
-    cipher=${cipher} hash=${hash} ${kx-attrs}''')
+    bulk=${bulk} cipher=${cipher} hash=${hash} ${kx-attrs}''')
   cmd_newmaster(args)
 
 ###--------------------------------------------------------------------------
@@ -552,24 +553,35 @@ def cmd_check(args):
 ###--------------------------------------------------------------------------
 ### Commands: mtu
 
+def mac_tagsz():
+  macname = conf['mac']
+  index = macname.rindex('/')
+  if index == -1: tagsz = C.gcmacs[macname].tagsz
+  else: tagsz = int(macname[index + 1:])/8
+  return tagsz
+
 def cmd_mtu(args):
   mtu, = (lambda mtu = '1500': (mtu,))(*args)
   mtu = int(mtu)
 
-  blksz = C.gcciphers[conf['cipher']].blksz
-
-  index = conf['mac'].find('/')
-  if index == -1:
-    tagsz = C.gcmacs[conf['mac']].tagsz
-  else:
-    tagsz = int(conf['mac'][index + 1:])/8
-
   mtu -= 20                             # Minimum IP header
   mtu -= 8                              # UDP header
   mtu -= 1                              # TrIPE packet type octet
-  mtu -= tagsz                          # MAC tag
-  mtu -= 4                              # Sequence number
-  mtu -= blksz                          # Initialization vector
+
+  bulk = conf['bulk']
+
+  if bulk == 'v0':
+    blksz = C.gcciphers[conf['cipher']].blksz
+    mtu -= mac_tagsz()                  # MAC tag
+    mtu -= 4                            # Sequence number
+    mtu -= blksz                        # Initialization vector
+
+  elif bulk == 'iiv':
+    mtu -= mac_tagsz()                  # MAC tag
+    mtu -= 4                            # Sequence number
+
+  else:
+    die("Unknown bulk transform `%s'" % bulk)
 
   print mtu