catcrypt: Implement symmetric key-encapsulation and signature schemes.

[u/mdw/catacomb] / dh.h

diff --git a/dh.h b/dh.h
index 8288740..689d8f1 100644 (file)
--- a/dh.h
+++ b/dh.h
@@ -166,6 +166,29 @@ extern int dh_limlee(dh_param */*dp*/, unsigned /*ql*/, unsigned /*pl*/,
                     pgen_proc */*oev*/, void */*oec*/, pgen_proc */*iev*/,
                     void */*iec*/, size_t */*nf*/, mp ***/*f*/);
 
+/* --- @dh_kcdsagen@ --- *
+ *
+ * Arguments:  @dh_param *dp@ = pointer to output parameter block
+ *             @unsigned ql@ = size of small factor of %$(p - 1)/2$%
+ *             @unsigned pl@ = size of %$p$% in bits
+ *             @unsigned flags@ = other generation flags (none defined)
+ *             @unsigned steps@ = number of steps to go
+ *             @grand *r@ = random number source
+ *             @pgen_proc *ev@ = event handler function
+ *             @void *ec@ = context for the event handler
+ *
+ * Returns:    @PGEN_DONE@ if it worked, @PGEN_ABORT@ if it failed.
+ *
+ * Use:                Generates a KCDSA prime group.  That is, it chooses a prime
+ *             %$p$%, such that $%p = 2 q v + 1$%, for primes %$q$% and
+ *             %$v$%.  The actual group of interest is the subgroup of order
+ *             %$q$%.
+ */
+
+extern int dh_kcdsagen(dh_param */*dp*/, unsigned /*ql*/, unsigned /*pl*/,
+                      unsigned /*flags*/, unsigned /*steps*/, grand */*r*/,
+                      pgen_proc */*ev*/, void */*ec*/);
+
 /* --- @dh_checkparam@ --- *
  *
  * Arguments:  @keycheck *kc@ = keycheck state
@@ -182,6 +205,19 @@ extern int dh_limlee(dh_param */*dp*/, unsigned /*ql*/, unsigned /*pl*/,
 extern int dh_checkparam(keycheck */*kc*/, const dh_param */*dp*/,
                         mp **/*v*/, size_t /*n*/);
 
+/* ---- @dh_infofromdata@ --- *
+ *
+ * Arguments:  @dh_param *dp@ = parameters to fill in
+ *             @pdata *pd@ = packed data structure
+ *
+ * Returns:    ---
+ *
+ * Use:                Fills in a parameters structure from a packed data block.
+ */
+
+struct pdata;
+extern void dh_infofromdata(dh_param */*dp*/, struct pdata */*pd*/);
+
 /* --- @dh_parse@, @dhbin_parse@ --- *
  *
  * Arguments:  @qd_parse *qd@ = parser context