/* -*-c-*-
*
- * $Id: cfb-def.h,v 1.1 1999/12/10 23:16:39 mdw Exp $
+ * $Id: cfb-def.h,v 1.3 2001/06/17 00:10:51 mdw Exp $
*
* Definitions for ciphertext feedback mode
*
/*----- Revision history --------------------------------------------------*
*
* $Log: cfb-def.h,v $
+ * Revision 1.3 2001/06/17 00:10:51 mdw
+ * Typesetting fixes
+ *
+ * Revision 1.2 2000/06/17 10:50:39 mdw
+ * Use secure arena for memory allocation. Rearrange setiv slightly.
+ *
* Revision 1.1 1999/12/10 23:16:39 mdw
* Split mode macros into interface and implementation.
*
#include <mLib/bits.h>
#include <mLib/sub.h>
+#ifndef CATACOMB_ARENA_H
+# include "arena.h"
+#endif
+
#ifndef CATACOMB_BLKC_H
# include "blkc.h"
#endif
# include "paranoia.h"
#endif
+#ifndef CATACOMB_PARANOIA_H
+# include "paranoia.h"
+#endif
+
/*----- Macros ------------------------------------------------------------*/
/* --- @CFB_DEF@ --- *
/* --- @pre_cfbgetiv@ --- * \
* \
* Arguments: @const pre_cfbctx *ctx@ = pointer to CFB context block \
- * @void *iv#@ = pointer to output data block \
+ * @void *iv@ = pointer to output data block \
* \
* Returns: --- \
* \
void pre##_cfbgetiv(const pre##_cfbctx *ctx, void *iv) \
{ \
octet *p = iv; \
- int off = ctx->off; \
- int rest = PRE##_BLKSZ - off; \
+ unsigned off = ctx->off; \
+ unsigned rest = PRE##_BLKSZ - off; \
memcpy(p, ctx->iv + off, rest); \
memcpy(p + rest, ctx->iv, off); \
} \
\
void pre##_cfbsetiv(pre##_cfbctx *ctx, const void *iv) \
{ \
- uint32 niv[PRE##_BLKSZ / 4]; \
- BLKC_LOAD(PRE, niv, iv); \
- pre##_eblk(&ctx->ctx, niv, niv); \
- BLKC_STORE(PRE, ctx->iv, niv); \
- ctx->off = 0; \
+ memcpy(ctx->iv, iv, PRE##_BLKSZ); \
+ ctx->off = PRE##_BLKSZ; \
} \
\
/* --- @pre_cfbbdry@ --- * \
\
void pre##_cfbbdry(pre##_cfbctx *ctx) \
{ \
- octet iv[PRE##_BLKSZ]; \
- pre##_cfbgetiv(ctx, iv); \
- pre##_cfbsetiv(ctx, iv); \
- BURN(iv); \
+ uint32 niv[PRE##_BLKSZ / 4]; \
+ BLKC_LOAD(PRE, niv, ctx->iv); \
+ pre##_eblk(&ctx->ctx, niv, niv); \
+ BLKC_STORE(PRE, ctx->iv, niv); \
+ ctx->off = PRE##_BLKSZ; \
+ BURN(niv); \
} \
\
/* --- @pre_cfbsetkey@ --- * \
void pre##_cfbsetkey(pre##_cfbctx *ctx, const pre##_ctx *k) \
{ \
ctx->ctx = *k; \
+ ctx->off = PRE##_BLKSZ; \
} \
\
/* --- @pre_cfbinit@ --- * \
{ \
const octet *s = src; \
octet *d = dest; \
- int off = ctx->off; \
+ unsigned off = ctx->off; \
\
/* --- Empty blocks are trivial --- */ \
\
return; \
} \
\
-/* --- @pre_cfbencrypt@ --- * \
+/* --- @pre_cfbdecrypt@ --- * \
* \
* Arguments: @pre_cfbctx *ctx@ = pointer to CFB context block \
* @const void *src@ = pointer to source data \
{ \
const octet *s = src; \
octet *d = dest; \
- int off = ctx->off; \
+ unsigned off = ctx->off; \
\
/* --- Empty blocks are trivial --- */ \
\
\
static gcipher *ginit(const void *k, size_t sz) \
{ \
- gctx *g = CREATE(gctx); \
+ gctx *g = S_CREATE(gctx); \
g->c.ops = &gops; \
pre##_cfbinit(&g->k, k, sz, 0); \
return (&g->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 const gcipher_ops gops = { \
- &pre##_cfb.b, \
- gencrypt, gdecrypt, gdestroy, gsetiv, gbdry \
+ &pre##_cfb, \
+ gencrypt, gdecrypt, gdestroy, gsetiv, gbdry \
}; \
\
const gccipher pre##_cfb = { \
- { #pre "-cfb", PRE##_KEYSZ, PRE##_BLKSZ }, \
+ #pre "-cfb", pre##_keysz, PRE##_BLKSZ, \
ginit \
}; \
\