X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/21c9a0ff462ba8cb1769b8ceb4277c8d99f56bf8..b817bfc642225b8c3c0b6a7e42d1fb949b61a606:/rand.h

diff --git a/rand.h b/rand.h
index 2f23440..fc6247b 100644
--- a/rand.h
+++ b/rand.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: rand.h,v 1.5 1999/12/13 15:34:15 mdw Exp $
+ * $Id: rand.h,v 1.9 2004/04/08 01:36:15 mdw Exp $
  *
  * Secure random number generator
  *
@@ -27,26 +27,6 @@
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: rand.h,v $
- * Revision 1.5  1999/12/13 15:34:15  mdw
- * Fix a typo.
- *
- * 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
@@ -172,6 +152,21 @@ extern void rand_init(rand_pool */*r*/);
 
 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
@@ -284,10 +279,11 @@ extern void rand_getgood(rand_pool */*r*/, void */*p*/, size_t /*sz*/);
 /* --- 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 --- */