/* -*-c-*-
*
- * $Id: rand.h,v 1.4 1999/12/10 23:29:48 mdw Exp $
+ * $Id: rand.h,v 1.9 2004/04/08 01:36:15 mdw Exp $
*
* Secure random number generator
*
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: rand.h,v $
- * Revision 1.4 1999/12/10 23:29:48 mdw
- * Change header file guard names.
- *
- * Revision 1.3 1999/10/15 21:04:30 mdw
- * Increase output buffer a bit for performance.
- *
- * Revision 1.2 1999/10/12 21:00:15 mdw
- * Make pool and buffer sizes more sensible.
- *
- * Revision 1.1 1999/09/03 08:41:12 mdw
- * Initial import.
- *
- */
-
/*----- Notes on the random number generator ------------------------------*
*
* The algorithm is one of the author's own devising. It may therefore be
extern void rand_noisesrc(rand_pool */*r*/, const rand_source */*s*/);
+/* --- @rand_seed@ --- *
+ *
+ * Arguments: @rand_pool *r@ = pointer to a randomness pool
+ * @unsigned bits@ = number of bits to ensure
+ *
+ * Returns: ---
+ *
+ * Use: Ensures that there are at least @bits@ good bits of entropy
+ * in the pool. It is recommended that you call this after
+ * initializing a new pool. Requesting @bits > RAND_IBITS@ is
+ * doomed to failure (and is an error).
+ */
+
+extern void rand_seed(rand_pool */*r*/, unsigned /*bits*/);
+
/* --- @rand_key@ --- *
*
* Arguments: @rand_pool *r@ = pointer to a randomness pool
* Use: Gets random data from the pool. The pool's contents can't be
* determined from the output of this function; nor can the
* output data be determined from a knowledge of the data input
- * to the pool wihtout also having knowledge of the secret key.
+ * to the pool without also having knowledge of the secret key.
* The good bits counter is decremented, although no special
* action is taken if it reaches zero.
*/
/* --- Miscellaneous operations --- */
enum {
- RAND_GATE = GRAND_SPECIFIC, /* No args */
+ RAND_GATE = GRAND_SPECIFIC('R'), /* No args */
RAND_STRETCH, /* No args */
RAND_KEY, /* @const void *k, size_t sz@ */
- RAND_NOISESRC /* @const rand_source *s@ */
+ RAND_NOISESRC, /* @const rand_source *s@ */
+ RAND_SEED /* @unsigned bits@ */
};
/* --- Default random number generator --- */