5 * Reading Diffie-Hellman parameters
7 * (c) 2004 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Header files ------------------------------------------------------*/
36 /*----- Main code ---------------------------------------------------------*/
38 /* ---- @dh_infofromdata@ --- *
40 * Arguments: @dh_param *dp@ = parameters to fill in
41 * @pdata *pd@ = packed data structure
45 * Use: Fills in a parameters structure from a packed data block.
48 void dh_infofromdata(dh_param *dp, pdata *pd)
49 { dp->p = &pd->p; dp->q = &pd->q; dp->g = &pd->g; }
51 /* --- @dh_parse@, @dhbin_parse@ --- *
53 * Arguments: @qd_parse *qd@ = parser context
54 * @dh_param *dp@ = parameters to fill in
56 * Returns: Zero if OK, nonzero on error.
58 * Use: Parses a prime group string. This is either one of the
59 * standard group strings, or a %$p$%, %$q$%, %$g$% triple
60 * separated by commas.
63 static int parse(qd_parse *qd, gprime_param *dp)
65 mp *p = MP_NEW, *q = MP_NEW, *g = MP_NEW;
67 if ((p = qd_getmp(qd)) == 0) goto fail;
68 qd_delim(qd, ','); if ((q = qd_getmp(qd)) == 0) goto fail;
69 qd_delim(qd, ','); if ((g = qd_getmp(qd)) == 0) goto fail;
70 dp->p = p; dp->q = q; dp->g = g;
73 mp_drop(p); mp_drop(q); mp_drop(g);
77 int dh_parse(qd_parse *qd, dh_param *dp)
81 for (pe = ptab; pe->name; pe++) {
82 if (qd_enum(qd, pe->name) >= 0) {
83 dh_infofromdata(dp, pe->data);
93 int dhbin_parse(qd_parse *qd, gbin_param *gb)
97 for (be = bintab; be->name; be++) {
98 if (qd_enum(qd, be->name) >= 0) {
99 dh_infofromdata(gb, be->data);
109 /*----- Test rig ----------------------------------------------------------*/
115 int main(int argc, char *argv[])
123 gr = fibrand_create(0);
124 fputs("checking standard prime groups:", stdout);
126 for (pe = ptab; pe->name; pe++) {
129 dh_infofromdata(&dp, pe->data);
130 g = group_prime(&dp);
131 if (mp_bits(dp.q) > 2048 &&
132 (!argv[1] || strcmp(argv[1], "keen") != 0)) {
133 printf(" [%s skipped]", pe->name);
141 printf(" [%s failed: %s]", pe->name, e);
144 printf(" %s", pe->name);
147 fputs(ok ? " ok\n" : " failed\n", stdout);
149 fputs("checking standard binary groups:", stdout);
150 for (be = bintab; be->name; be++) {
153 dh_infofromdata(&gb, be->data);
154 g = group_binary(&gb);
159 printf(" [%s failed: %s]", be->name, e);
162 printf(" %s", be->name);
165 fputs(ok ? " ok\n" : " failed\n", stdout);
166 gr->ops->destroy(gr);
172 /*----- That's all, folks -------------------------------------------------*/