From 97829771e9fa1317b2166f9d7a626212b355e5e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niels=20M=C3=B6ller?= <nisse@lysator.liu.se>
Date: Fri, 7 Sep 2001 19:38:29 +0200
Subject: Work-in-progress.

Rev: src/nettle/Makefile.am:1.12
Rev: src/nettle/cbc.c:1.2
Rev: src/nettle/cbc.h:1.2
---
 cbc.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'cbc.h')

diff --git a/cbc.h b/cbc.h
index 4335a518..2bf72e7c 100644
--- a/cbc.h
+++ b/cbc.h
@@ -28,7 +28,7 @@
 
 #include <inttypes.h>
 
-/* Uses a void * for cipher contexts. It's hard to be type safe. */
+/* Uses a void * for cipher contexts. */
 
 void
 cbc_encrypt(void *ctx, void (*f)(void *ctx,
@@ -46,4 +46,11 @@ cbc_decrypt(void *ctx, void (*f)(void *ctx,
 	    unsigned length, uint8_t *dst,
 	    const uint8_t *src);
 
+/* Type safer variants */
+#define CBC_ENCRYPT(ctx, f, b, iv, l, dst, src) \
+(0 ? ((f)((ctx),0,NULL,NULL)) \
+   : cbc_encrypt((void *)(ctx), \
+                 ((*)(void *, unsigned, uint8_t *, const uint8_t *)) (f), \
+                 (b), (iv), (l), (dst), (src)))
+
 #endif /* NETTLE_CBC_H_INCLUDED */
-- 
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