/* -*-c-*-
*
- * $Id: ghash.h,v 1.2 2000/06/17 11:22:17 mdw Exp $
+ * $Id: ghash.h,v 1.6 2004/04/04 19:42:30 mdw Exp $
*
* Generic hash function interface
*
/*----- Revision history --------------------------------------------------*
*
* $Log: ghash.h,v $
+ * Revision 1.6 2004/04/04 19:42:30 mdw
+ * Make tables of standard encryption schemes etc.
+ *
+ * Revision 1.5 2000/07/15 10:00:58 mdw
+ * New generic hash operation for copying hash contexts.
+ *
+ * Revision 1.4 2000/07/03 18:08:24 mdw
+ * Include `bits.h'.
+ *
+ * Revision 1.3 2000/07/02 18:27:42 mdw
+ * (ghash->ops->done): Interface change. Passing in a null buffer pointer
+ * uses a buffer internal to the ghash object. The operation returns the
+ * address of the buffer it used. Clients of generic hashes no longer need
+ * to use dynamically allocated memory for hash results.
+ *
* Revision 1.2 2000/06/17 11:22:17 mdw
* Minor changes in the generic hash interface.
*
#include <stddef.h>
+#include <mLib/bits.h>
+
/*----- Generic hash function interface -----------------------------------*/
typedef struct ghash {
typedef struct ghash_ops {
const struct gchash *c; /* Pointer to hash class */
void (*hash)(ghash */*h*/, const void */*p*/, size_t /*sz*/); /* Hash */
- void (*done)(ghash */*h*/, void */*buf*/); /* Write result */
+ octet *(*done)(ghash */*h*/, void */*buf*/); /* Write result */
void (*destroy)(ghash */*h*/); /* Destroy hash block */
+ ghash *(*copy)(ghash */*h*/); /* Make a copy of the hash context */
} ghash_ops;
+#define GH_INIT(ch) (ch)->init()
+#define GH_CLASS(H) (h)->ops->c
+#define GH_HASH(h, p, sz) (h)->ops->hash((h), (p), (sz))
+#define GH_DONE(h, buf) (h)->ops->done((h), (buf))
+#define GH_DESTROY(h) (h)->ops->destroy((h))
+#define GH_COPY(h) (h)->ops->copy((h))
+
typedef struct gchash {
const char *name; /* Name of the hash function */
size_t hashsz; /* Size of output hash */
ghash *(*init)(void); /* Create a new hash instance */
+ size_t bufsz; /* Buffer size, or zero */
} gchash;
+/*----- Tables ------------------------------------------------------------*/
+
+extern const gchash *const ghashtab[];
+
+/* --- @ghash_byname@ --- *
+ *
+ * Arguments: @const char *p@ = pointer to name string
+ *
+ * Returns: The named cipher class, or null.
+ */
+
+extern const gchash *ghash_byname(const char */*p*/);
+
/*----- That's all, folks -------------------------------------------------*/
#ifdef __cplusplus