/* -*-c-*-
*
- * $Id: gcipher.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
+ * $Id: gcipher.h,v 1.5 2004/04/21 00:37:32 mdw Exp $
*
* Generic symmetric cipher interface
*
* (c) 1999 Straylight/Edgeware
*/
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------*
*
* This file is part of Catacomb.
*
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
- *
+ *
* Catacomb 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 Library General Public License for more details.
- *
+ *
* You should have received a copy of the GNU Library General Public
* License along with Catacomb; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
#include <mLib/bits.h>
+#ifndef CATACOMB_KEYSZ_H
+# include "keysz.h"
+#endif
+
/*----- Generic symmetric cipher interface --------------------------------*/
typedef struct gcipher {
} gccipher;
#define GC_INIT(cc, k, sz) (cc)->init((k), (sz))
-#define GC_CLASS(c) (c)->ops->c
+#define GC_CLASS(cc) (cc)->ops->c
#define GC_ENCRYPT(c, s, t, sz) (c)->ops->encrypt((c), (s), (t), (sz))
#define GC_DECRYPT(c, s, t, sz) (c)->ops->decrypt((c), (s), (t), (sz))
#define GC_DESTROY(c) (c)->ops->destroy((c))
#define GC_SETIV(c, iv) (c)->ops->setiv((c), (iv))
#define GC_BDRY(c) (c)->ops->bdry((c))
-/*----- Key size management -----------------------------------------------*/
-
-/* --- Key size type constants --- *
- *
- * A key size limitation is an array of bytes. The first byte describes the
- * kind of limitation on the key size %$k$%; the rest are argument bytes
- * %$a_i$%, for %$i \ge 0$%. In all cases, %$a_0$% is the `recommended' key
- * size.
- *
- * * @KSZ_ANY@ means there is no restriction.
- *
- * * @KSZ_RANGE@ requires that %$k \ge a_1$%, %$k \equiv 0 \pmod{a_3}$%,
- * and, if %$a_2 \ne 0$%, %$k \le a_2$%.
- *
- * * @KSZ_SET@ requires that %$k \in {\,a_i\,}$%.
- */
-
-enum {
- KSZ_ANY, /* Allows any key at all */
- KSZ_RANGE, /* Allows keys within a range */
- KSZ_SET /* Allows specific sizes of keys */
-};
-
-/* --- @keysz@ --- *
- *
- * Arguments: @size_t sz@ = a proposed key size, or zero
- * @const octet *ksz@ = pointer to key size table
- *
- * Returns: See below.
- *
- * Use: Returns a sensible key size. If @sz@ is nonzero, it is
- * interpreted as an amount (in bytes) of key material which the
- * caller has available, and the return value is either the
- * largest allowable key size less than or equal to the caller's
- * size, or zero if there is no valid key length small enough.
- * If @sz@ is zero, the function returns a `recommended' key
- * size.
- */
-
-extern size_t keysz(size_t /*sz*/, const octet */*ksz*/);
-
-#define KSZ_CHECK(pre, sz) (keysz((sz), pre##_keysz) == (sz))
-#define KSZ_ASSERT(pre, sz) \
- assert(((void)"Bad key size for " #pre, KSZ_CHECK(pre, sz)))
-
/*----- Tables ------------------------------------------------------------*/
extern const gccipher *const gciphertab[];