X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=secnet.git;a=blobdiff_plain;f=transform-cbcmac.c;h=ca260f013c94bed03216c2e703cbaadf84b8424f;hp=fac8649587e58cb9451bf88317fed943f36ad82a;hb=ce53e0ea9aad729511e8b315dcbed7122272c2a1;hpb=c921f0c57414017ae53f7a14513e8f2188d4a61e

diff --git a/transform-cbcmac.c b/transform-cbcmac.c
index fac8649..ca260f0 100644
--- a/transform-cbcmac.c
+++ b/transform-cbcmac.c
@@ -1,5 +1,24 @@
 /* Transform module - bulk data transformation */
 
+/*
+ * This file is part of secnet.
+ * See README for full list of copyright holders.
+ *
+ * secnet is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version d of the License, or
+ * (at your option) any later version.
+ * 
+ * secnet is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * version 3 along with secnet; if not, see
+ * https://www.gnu.org/licenses/gpl.html.
+ */
+
 /* For now it's hard-coded to do sequence
    number/pkcs5/serpent-cbcmac/serpent with a 256 bit key for each
    instance of serpent. We also require key material for the IVs for
@@ -18,26 +37,28 @@
 /* Required key length in bytes */
 #define REQUIRED_KEYLEN ((512+64+32)/8)
 
+#include "transform-common.h"
+
+struct transform_params {
+    SEQNUM_PARAMS_FIELDS;
+};
+
 struct transform {
     closure_t cl;
     struct transform_if ops;
-    uint32_t max_seq_skew;
+    struct transform_params p;
 };
 
 struct transform_inst {
     struct transform_inst_if ops;
+    struct transform_params p;
     struct keyInstance cryptkey;
     struct keyInstance mackey;
     uint32_t cryptiv;
     uint32_t maciv;
-    uint32_t sendseq;
-    uint32_t lastrecvseq;
-    uint32_t max_skew;
-    bool_t keyed;
+    SEQNUM_KEYED_FIELDS;
 };
 
-#include "transform-common.h"
-
 #define PKCS5_MASK 15
 
 static bool_t transform_setkey(void *sst, uint8_t *key, int32_t keylen,
@@ -63,9 +84,8 @@ static bool_t transform_setkey(void *sst, uint8_t *key, int32_t keylen,
     serpentbe_makekey(&ti->mackey,256,key+32);
     ti->cryptiv=get_uint32(key+64);
     ti->maciv=get_uint32(key+68);
-    ti->sendseq=get_uint32(key+72);
-    ti->lastrecvseq=ti->sendseq;
-    ti->keyed=True;
+    uint32_t firstseq=get_uint32(key+72);
+    SEQNUM_KEYED_INIT(firstseq,firstseq);
 
     return True;
 }
@@ -230,7 +250,7 @@ static uint32_t transform_reverse(void *sst, struct buffer_if *buf,
     /* Sequence number must be within max_skew of lastrecvseq; lastrecvseq
        is only allowed to increase. */
     seqnum=buf_unprepend_uint32(buf);
-    SEQNUM_CHECK(seqnum, ti->max_skew);
+    SEQNUM_CHECK(seqnum, &ti->p);
     
     return 0;
 }
@@ -243,7 +263,7 @@ static struct transform_inst_if *transform_create(void *sst)
 
     TRANSFORM_CREATE_CORE;
 
-    ti->max_skew=st->max_seq_skew;
+    ti->p=st->p;
 
     return &ti->ops;
 }
@@ -255,7 +275,7 @@ static list_t *transform_apply(closure_t *self, struct cloc loc,
     item_t *item;
     dict_t *dict;
 
-    st=safe_malloc(sizeof(*st),"serpent");
+    NEW(st);
     st->cl.description="serpent-cbc256";
     st->cl.type=CL_TRANSFORM;
     st->cl.apply=NULL;
@@ -275,8 +295,8 @@ static list_t *transform_apply(closure_t *self, struct cloc loc,
 	cfgfatal(loc,"userv-ipif","parameter must be a dictionary\n");
     
     dict=item->data.dict;
-    st->max_seq_skew=dict_read_number(dict, "max-sequence-skew",
-				      False, "serpent-cbc256", loc, 10);
+
+    SEQNUM_PARAMS_INIT(dict,&st->p,"serpent-cbc256",loc);
 
     SET_CAPAB_TRANSFORMNUM(CAPAB_TRANSFORMNUM_SERPENT256CBC);
 
@@ -336,7 +356,7 @@ void transform_cbcmac_module(dict_t *dict)
 	const char *errmsg;
 	int i;
 
-	tr = safe_malloc(sizeof(struct transform),"test transform");
+	NEW(tr);
 	tr->max_seq_skew = 20;
 	ti = transform_create(tr);