/* -*-c-*-
*
- * $Id: dh-param.c,v 1.1 2004/04/01 12:50:09 mdw Exp $
+ * $Id$
*
* Reading Diffie-Hellman parameters
*
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: dh-param.c,v $
- * Revision 1.1 2004/04/01 12:50:09 mdw
- * Add cyclic group abstraction, with test code. Separate off exponentation
- * functions for better static linking. Fix a buttload of bugs on the way.
- * Generally ensure that negative exponents do inversion correctly. Add
- * table of standard prime-field subgroups. (Binary field subgroups are
- * currently unimplemented but easy to add if anyone ever finds a good one.)
- *
- */
-
/*----- Header files ------------------------------------------------------*/
#include "dh.h"
#include "ptab.h"
+#include "bintab.h"
/*----- Main code ---------------------------------------------------------*/
-/* --- @dh_parse@ --- *
+/* ---- @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.
+ */
+
+void dh_infofromdata(dh_param *dp, pdata *pd)
+ { dp->p = &pd->p; dp->q = &pd->q; dp->g = &pd->g; }
+
+/* --- @dh_parse@, @dhbin_parse@ --- *
*
* Arguments: @qd_parse *qd@ = parser context
* @dh_param *dp@ = parameters to fill in
* separated by commas.
*/
-static void getinfo(dh_param *dp, pdata *pd)
- { dp->p = &pd->p; dp->q = &pd->q; dp->g = &pd->g; }
+static int parse(qd_parse *qd, gprime_param *dp)
+{
+ mp *p = MP_NEW, *q = MP_NEW, *g = MP_NEW;
+
+ if ((p = qd_getmp(qd)) == 0) goto fail;
+ qd_delim(qd, ','); if ((q = qd_getmp(qd)) == 0) goto fail;
+ qd_delim(qd, ','); if ((g = qd_getmp(qd)) == 0) goto fail;
+ dp->p = p; dp->q = q; dp->g = g;
+ return (0);
+fail:
+ mp_drop(p); mp_drop(q); mp_drop(g);
+ return (-1);
+}
int dh_parse(qd_parse *qd, dh_param *dp)
{
- mp *p = MP_NEW, *q = MP_NEW, *g = MP_NEW;
const pentry *pe;
for (pe = ptab; pe->name; pe++) {
if (qd_enum(qd, pe->name) >= 0) {
- getinfo(dp, pe->data);
+ dh_infofromdata(dp, pe->data);
goto found;
}
}
- if ((p = qd_getmp(qd)) == 0) goto fail;
- qd_delim(qd, ','); if ((q = qd_getmp(qd)) == 0) goto fail;
- qd_delim(qd, ','); if ((g = qd_getmp(qd)) == 0) goto fail;
- dp->p = p; dp->q = q; dp->g = g;
+ if (parse(qd, dp))
+ return (-1);
found:
return (0);
+}
-fail:
- mp_drop(p); mp_drop(q); mp_drop(g);
- return (-1);
+int dhbin_parse(qd_parse *qd, gbin_param *gb)
+{
+ const binentry *be;
+
+ for (be = bintab; be->name; be++) {
+ if (qd_enum(qd, be->name) >= 0) {
+ dh_infofromdata(gb, be->data);
+ goto found;
+ }
+ }
+ if (parse(qd, gb))
+ return (-1);
+found:
+ return (0);
}
/*----- Test rig ----------------------------------------------------------*/
#include "fibrand.h"
-int main(void)
+int main(int argc, char *argv[])
{
const pentry *pe;
+ const binentry *be;
const char *e;
- int ok = 1;
+ int ok = 1, aok = 1;
grand *gr;
gr = fibrand_create(0);
- fputs("checking standard prime fields: ", stdout);
+ fputs("checking standard prime groups:", stdout);
+ fflush(stdout);
for (pe = ptab; pe->name; pe++) {
dh_param dp;
group *g;
- getinfo(&dp, pe->data);
+ dh_infofromdata(&dp, pe->data);
g = group_prime(&dp);
+ if (mp_bits(dp.q) > 2048 &&
+ (!argv[1] || strcmp(argv[1], "keen") != 0)) {
+ printf(" [%s skipped]", pe->name);
+ fflush(stdout);
+ continue;
+ }
e = G_CHECK(g, gr);
G_DESTROYGROUP(g);
dh_paramfree(&dp);
if (e) {
- fprintf(stderr, "\n*** group %s fails: %s\n", pe->name, e);
- ok = 0;
- }
- putchar('.');
+ printf(" [%s failed: %s]", pe->name, e);
+ ok = aok = 0;
+ } else
+ printf(" %s", pe->name);
+ fflush(stdout);
+ }
+ fputs(ok ? " ok\n" : " failed\n", stdout);
+ ok = 1;
+ fputs("checking standard binary groups:", stdout);
+ for (be = bintab; be->name; be++) {
+ gbin_param gb;
+ group *g;
+ dh_infofromdata(&gb, be->data);
+ g = group_binary(&gb);
+ e = G_CHECK(g, gr);
+ G_DESTROYGROUP(g);
+ dh_paramfree(&gb);
+ if (e) {
+ printf(" [%s failed: %s]", be->name, e);
+ ok = aok = 0;
+ } else
+ printf(" %s", be->name);
fflush(stdout);
}
- gr->ops->destroy(gr);
fputs(ok ? " ok\n" : " failed\n", stdout);
- return (!ok);
+ gr->ops->destroy(gr);
+ return (!aok);
}
#endif