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Add some fast paths for standard operations.
[catacomb]
/
cbc-def.h
diff --git
a/cbc-def.h
b/cbc-def.h
index
aff245c
..
00695ae
100644
(file)
--- a/
cbc-def.h
+++ b/
cbc-def.h
@@
-1,6
+1,6
@@
/* -*-c-*-
*
/* -*-c-*-
*
- * $Id: cbc-def.h,v 1.
1 1999/12/10 23:16:39
mdw Exp $
+ * $Id: cbc-def.h,v 1.
6 2004/04/17 09:58:36
mdw Exp $
*
* Definitions for cipher block chaining mode
*
*
* Definitions for cipher block chaining mode
*
@@
-27,14
+27,6
@@
* MA 02111-1307, USA.
*/
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: cbc-def.h,v $
- * Revision 1.1 1999/12/10 23:16:39 mdw
- * Split mode macros into interface and implementation.
- *
- */
-
#ifndef CATACOMB_CBC_DEF_H
#define CATACOMB_CBC_DEF_H
#ifndef CATACOMB_CBC_DEF_H
#define CATACOMB_CBC_DEF_H
@@
-49,6
+41,10
@@
#include <mLib/bits.h>
#include <mLib/sub.h>
#include <mLib/bits.h>
#include <mLib/sub.h>
+#ifndef CATACOMB_ARENA_H
+# include "arena.h"
+#endif
+
#ifndef CATACOMB_BLKC_H
# include "blkc.h"
#endif
#ifndef CATACOMB_BLKC_H
# include "blkc.h"
#endif
@@
-57,6
+53,10
@@
# include "gcipher.h"
#endif
# include "gcipher.h"
#endif
+#ifndef CATACOMB_PARANOIA_H
+# include "paranoia.h"
+#endif
+
/*----- Macros ------------------------------------------------------------*/
/* --- @CBC_DEF@ --- *
/*----- Macros ------------------------------------------------------------*/
/* --- @CBC_DEF@ --- *
@@
-71,7
+71,7
@@
/* --- @pre_cbcgetiv@ --- * \
* \
* Arguments: @const pre_cbcctx *ctx@ = pointer to CBC context block \
/* --- @pre_cbcgetiv@ --- * \
* \
* Arguments: @const pre_cbcctx *ctx@ = pointer to CBC context block \
- * @void *iv
#@ = pointer to output data block
\
+ * @void *iv
@ = pointer to output data block
\
* \
* Returns: --- \
* \
* \
* Returns: --- \
* \
@@
-134,7
+134,7
@@
void pre##_cbcinit(pre##_cbcctx *ctx, \
const void *key, size_t sz, \
const void *iv) \
{ \
const void *key, size_t sz, \
const void *iv) \
{ \
- static
octet zero[PRE##_BLKSZ] = { 0 };
\
+ static
const octet zero[PRE##_BLKSZ] = { 0 };
\
pre##_init(&ctx->ctx, key, sz); \
BLKC_LOAD(PRE, ctx->iv, iv ? iv : zero); \
} \
pre##_init(&ctx->ctx, key, sz); \
BLKC_LOAD(PRE, ctx->iv, iv ? iv : zero); \
} \
@@
-179,8
+179,10
@@
void pre##_cbcencrypt(pre##_cbcctx *ctx, \
\
pre##_eblk(&ctx->ctx, ctx->iv, ctx->iv); \
BLKC_STORE(PRE, b, ctx->iv); \
\
pre##_eblk(&ctx->ctx, ctx->iv, ctx->iv); \
BLKC_STORE(PRE, b, ctx->iv); \
- for (i = 0; i < sz; i++) \
- d[i] = b[i] ^ s[i]; \
+ if (d) { \
+ for (i = 0; i < sz; i++) \
+ d[i] = b[i] ^ (s ? s[i] : 0); \
+ } \
memmove(b, b + sz, PRE##_BLKSZ - sz); \
memcpy(b + PRE##_BLKSZ - sz, d, sz); \
BLKC_LOAD(PRE, ctx->iv, b); \
memmove(b, b + sz, PRE##_BLKSZ - sz); \
memcpy(b + PRE##_BLKSZ - sz, d, sz); \
BLKC_LOAD(PRE, ctx->iv, b); \
@@
-195,11
+197,15
@@
void pre##_cbcencrypt(pre##_cbcctx *ctx, \
*/ \
\
while (sz >= 2 * PRE##_BLKSZ || sz == PRE##_BLKSZ) { \
*/ \
\
while (sz >= 2 * PRE##_BLKSZ || sz == PRE##_BLKSZ) { \
- BLKC_XLOAD(PRE, ctx->iv, s); \
+ if (s) { \
+ BLKC_XLOAD(PRE, ctx->iv, s); \
+ s += PRE##_BLKSZ; \
+ } \
pre##_eblk(&ctx->ctx, ctx->iv, ctx->iv); \
pre##_eblk(&ctx->ctx, ctx->iv, ctx->iv); \
- BLKC_STORE(PRE, d, ctx->iv); \
- s += PRE##_BLKSZ; \
- d += PRE##_BLKSZ; \
+ if (d) { \
+ BLKC_STORE(PRE, d, ctx->iv); \
+ d += PRE##_BLKSZ; \
+ } \
sz -= PRE##_BLKSZ; \
} \
\
sz -= PRE##_BLKSZ; \
} \
\
@@
-224,7
+230,7
@@
void pre##_cbcencrypt(pre##_cbcctx *ctx, \
* block. \
*/ \
\
* block. \
*/ \
\
-
BLKC_XLOAD(PRE, ctx->iv, s);
\
+
if (s) BLKC_XLOAD(PRE, ctx->iv, s);
\
pre##_eblk(&ctx->ctx, ctx->iv, ctx->iv); \
BLKC_STORE(PRE, b, ctx->iv); \
\
pre##_eblk(&ctx->ctx, ctx->iv, ctx->iv); \
BLKC_STORE(PRE, b, ctx->iv); \
\
@@
-235,16
+241,16
@@
void pre##_cbcencrypt(pre##_cbcctx *ctx, \
* ciphertext block. \
*/ \
\
* ciphertext block. \
*/ \
\
-
s += PRE##_BLKSZ;
\
-
d += PRE##_BLKSZ;
\
+
if (s) s += PRE##_BLKSZ;
\
+
if (d) d += PRE##_BLKSZ;
\
for (i = 0; i < sz; i++) { \
register octet x = b[i]; \
for (i = 0; i < sz; i++) { \
register octet x = b[i]; \
-
b[i] ^= s[i];
\
-
d[i] = x;
\
+
if (s) b[i] ^= s[i];
\
+
if (d) d[i] = x;
\
} \
BLKC_LOAD(PRE, ctx->iv, b); \
pre##_eblk(&ctx->ctx, ctx->iv, ctx->iv); \
} \
BLKC_LOAD(PRE, ctx->iv, b); \
pre##_eblk(&ctx->ctx, ctx->iv, ctx->iv); \
-
BLKC_STORE(PRE, d - PRE##_BLKSZ, ctx->iv);
\
+
if (d) BLKC_STORE(PRE, d - PRE##_BLKSZ, ctx->iv);
\
} \
\
/* --- Done --- */ \
} \
\
/* --- Done --- */ \
@@
-389,7
+395,7
@@
typedef struct gctx { \
\
static gcipher *ginit(const void *k, size_t sz) \
{ \
\
static gcipher *ginit(const void *k, size_t sz) \
{ \
- gctx *g =
CREATE(gctx);
\
+ gctx *g =
S_CREATE(gctx);
\
g->c.ops = &gops; \
pre##_cbcinit(&g->k, k, sz, 0); \
return (&g->c); \
g->c.ops = &gops; \
pre##_cbcinit(&g->k, k, sz, 0); \
return (&g->c); \
@@
-410,7
+416,8
@@
static void gdecrypt(gcipher *c, const void *s, void *t, size_t sz) \
static void gdestroy(gcipher *c) \
{ \
gctx *g = (gctx *)c; \
static void gdestroy(gcipher *c) \
{ \
gctx *g = (gctx *)c; \
- DESTROY(g); \
+ BURN(*g); \
+ S_DESTROY(g); \
} \
\
static void gsetiv(gcipher *c, const void *iv) \
} \
\
static void gsetiv(gcipher *c, const void *iv) \
@@
-420,12
+427,12
@@
static void gsetiv(gcipher *c, const void *iv) \
} \
\
static const gcipher_ops gops = { \
} \
\
static const gcipher_ops gops = { \
- &pre##_cbc
.b,
\
-
gencrypt, gdecrypt, gdestroy, gsetiv, 0
\
+ &pre##_cbc
,
\
+
gencrypt, gdecrypt, gdestroy, gsetiv, 0
\
}; \
\
const gccipher pre##_cbc = { \
}; \
\
const gccipher pre##_cbc = { \
-
{ #pre "-cbc", PRE##_KEYSZ, PRE##_BLKSZ },
\
+
#pre "-cbc", pre##_keysz, PRE##_BLKSZ,
\
ginit \
}; \
\
ginit \
}; \
\