| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id$ |
| 4 | * |
| 5 | * Utilities for Catacomb/Perl |
| 6 | * |
| 7 | * (c) 2001 Straylight/Edgeware |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of the Perl interface to Catacomb. |
| 13 | * |
| 14 | * Catacomb/Perl is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * Catacomb/Perl 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 General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with Catacomb/Perl; if not, write to the Free Software Foundation, |
| 26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 27 | */ |
| 28 | |
| 29 | /*----- Header files ------------------------------------------------------*/ |
| 30 | |
| 31 | #include "catacomb-perl.h" |
| 32 | #include <catacomb/ec-guts.h> |
| 33 | #include <catacomb/group-guts.h> |
| 34 | #include <catacomb/field-guts.h> |
| 35 | #include <catacomb/ectab.h> |
| 36 | #include <catacomb/ptab.h> |
| 37 | #include <catacomb/bintab.h> |
| 38 | |
| 39 | /*----- Lists of things ---------------------------------------------------*/ |
| 40 | |
| 41 | #define LISTS(LI) \ |
| 42 | LI(list, lists[i].name, lists[i].name) \ |
| 43 | LI(hash, ghashtab[i], ghashtab[i]->name) \ |
| 44 | LI(prp, prptab[i], prptab[i]->name) \ |
| 45 | LI(cipher, gciphertab[i], gciphertab[i]->name) \ |
| 46 | LI(mac, gmactab[i], gmactab[i]->name) \ |
| 47 | LI(mgfrand, mgftab[i].name, mgftab[i].name) \ |
| 48 | LI(counterrand, ctrtab[i].name, ctrtab[i].name) \ |
| 49 | LI(ofbrand, ofbtab[i].name, ofbtab[i].name) \ |
| 50 | LI(ec, ectab[i].name, ectab[i].name) \ |
| 51 | LI(prime, ptab[i].name, ptab[i].name) \ |
| 52 | LI(bin, bintab[i].name, bintab[i].name) |
| 53 | |
| 54 | #define XLISTFN(what, endp, name) \ |
| 55 | static void list##what(void) \ |
| 56 | { \ |
| 57 | int i; \ |
| 58 | dSP; \ |
| 59 | for (i = 0; endp; i++) \ |
| 60 | XPUSHs(sv_2mortal(newSVpv(name, 0))); \ |
| 61 | PUTBACK; \ |
| 62 | } |
| 63 | |
| 64 | #define ENTRY(what, endp, name) { #what, list##what }, |
| 65 | |
| 66 | struct listent { |
| 67 | const char *name; |
| 68 | void (*list)(void); |
| 69 | }; |
| 70 | |
| 71 | static const struct listent lists[]; |
| 72 | |
| 73 | LISTS(XLISTFN) |
| 74 | |
| 75 | static const struct listent lists[] = { |
| 76 | LISTS(ENTRY) |
| 77 | { 0, 0 } |
| 78 | }; |
| 79 | |
| 80 | void names(const char *name) |
| 81 | { |
| 82 | int i; |
| 83 | |
| 84 | for (i = 0; lists[i].name; i++) { |
| 85 | if (strcmp(name, lists[i].name) == 0) { |
| 86 | lists[i].list(); |
| 87 | return; |
| 88 | } |
| 89 | } |
| 90 | croak("unknown list `%s'", name); |
| 91 | } |
| 92 | |
| 93 | /*----- Miscellaneous things ----------------------------------------------*/ |
| 94 | |
| 95 | U32 findconst(const struct consttab *cc, const char *pkg, const char *name) |
| 96 | { |
| 97 | const char *p; |
| 98 | if ((p = strrchr(name, ':')) != 0) |
| 99 | name = p + 1; |
| 100 | while (cc->name) { |
| 101 | if (strcmp(cc->name, name) == 0) |
| 102 | return (cc->val); |
| 103 | cc++; |
| 104 | } |
| 105 | croak("unknown %s constant `%s'", pkg, name); |
| 106 | } |
| 107 | |
| 108 | void ptrtosv(SV **sv, void *p, const char *type) |
| 109 | { |
| 110 | if (p) |
| 111 | sv_setref_pv(*sv, type, (void *)p); |
| 112 | else |
| 113 | *sv = &PL_sv_undef; |
| 114 | } |
| 115 | |
| 116 | void *ptrfromsv(SV *sv, const char *type, const char *what, ...) |
| 117 | { |
| 118 | if (!sv_derived_from(sv, type)) { |
| 119 | va_list ap; |
| 120 | SV *t = sv_newmortal(); |
| 121 | va_start(ap, what); |
| 122 | sv_vsetpvfn(t, what, strlen(what), &ap, 0, 0, 0); |
| 123 | croak("%s is not of type %s", SvPVX(t), type); |
| 124 | } |
| 125 | return (void *)SvIV((SV *)SvRV(sv)); |
| 126 | } |
| 127 | |
| 128 | void *ptrfromsvdflt(SV *sv, const char *type, void *dflt, const char *what) |
| 129 | { |
| 130 | if (!SvOK(sv)) |
| 131 | return (dflt); |
| 132 | else |
| 133 | return (ptrfromsv(sv, type, "%s", what)); |
| 134 | } |
| 135 | |
| 136 | /*----- Cursor reading stuff ----------------------------------------------*/ |
| 137 | |
| 138 | void c_init(cursor *c, SV *sv) |
| 139 | { |
| 140 | if (!SvROK(sv)) |
| 141 | croak("not a reference"); |
| 142 | sv = SvRV(sv); |
| 143 | switch (SvTYPE(sv)) { |
| 144 | case SVt_PVAV: |
| 145 | c->f = CF_ARRAY; |
| 146 | c->u.a.av = (AV *)sv; |
| 147 | c->u.a.i = 0; |
| 148 | break; |
| 149 | case SVt_PVHV: |
| 150 | c->f = CF_HASH; |
| 151 | c->u.hv = (HV *)sv; |
| 152 | break; |
| 153 | default: |
| 154 | croak("must be hash ref or array ref"); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | void c_skip(cursor *c) |
| 159 | { |
| 160 | if (!(c->f & CF_HASH)) |
| 161 | c->u.a.i++; |
| 162 | } |
| 163 | |
| 164 | SV *c_get(cursor *c, const char *tag, unsigned f) |
| 165 | { |
| 166 | SV **sv; |
| 167 | |
| 168 | if (c->f & CF_HASH) |
| 169 | sv = hv_fetch(c->u.hv, tag, strlen(tag), 0); |
| 170 | else { |
| 171 | sv = av_fetch(c->u.a.av, c->u.a.i, 0); |
| 172 | if (sv) c->u.a.i++; |
| 173 | } |
| 174 | if ((f & CF_MUST) && !sv) |
| 175 | croak("missing entry `%s'", tag); |
| 176 | return (sv ? *sv : &PL_sv_undef); |
| 177 | } |
| 178 | |
| 179 | void hvput(HV *hv, const char *k, SV *val) |
| 180 | { |
| 181 | SV **sv = hv_fetch(hv, k, strlen(k), 1); |
| 182 | if (!sv) |
| 183 | croak("couldn't set hash key %s", k); |
| 184 | *sv = val; |
| 185 | } |
| 186 | |
| 187 | /*----- Wrapped objects ---------------------------------------------------*/ |
| 188 | |
| 189 | static SV *firstelt(SV *sv, const char *what) |
| 190 | { |
| 191 | AV *av; |
| 192 | SV **svp; |
| 193 | |
| 194 | if (!SvROK(sv)) |
| 195 | croak("%s is not a reference", what); |
| 196 | sv = SvRV(sv); |
| 197 | if (SvTYPE(sv) != SVt_PVAV) |
| 198 | croak("%s is not an array reference", what); |
| 199 | av = (AV *)sv; |
| 200 | svp = av_fetch(av, 0, 0); |
| 201 | if (!svp) |
| 202 | croak("%s is empty", what); |
| 203 | return (*svp); |
| 204 | } |
| 205 | |
| 206 | ge *groupelt(SV *sv, const char *what) |
| 207 | { |
| 208 | if (sv_derived_from(sv, "Catacomb::Group::Elt")) |
| 209 | sv = firstelt(sv, what); |
| 210 | return (ptrfromsv(sv, "Catacomb::Group::Element", what)); |
| 211 | } |
| 212 | |
| 213 | mp *fieldelt(SV *sv, const char *what) |
| 214 | { |
| 215 | if (sv_derived_from(sv, "Catacomb::Field::Elt")) |
| 216 | sv = firstelt(sv, what); |
| 217 | return (mp_fromsv(sv, what, 0, 0)); |
| 218 | } |
| 219 | |
| 220 | ec *ecpt(SV *sv, const char *what) |
| 221 | { |
| 222 | if (sv_derived_from(sv, "Catacomb::EC::Pt")) |
| 223 | sv = firstelt(sv, what); |
| 224 | return (ptrfromsv(sv, "Catacomb::EC::Point", what)); |
| 225 | } |
| 226 | |
| 227 | /*----- DSA contexts ------------------------------------------------------*/ |
| 228 | |
| 229 | void gdsa_privfromsv(gdsa *g, SV *sv) |
| 230 | { |
| 231 | cursor c; |
| 232 | |
| 233 | c_init(&c, sv); |
| 234 | g->g = C_PTR(&c, "G", "Catacomb::Group"); |
| 235 | g->p = C_GE(&c, "p"); |
| 236 | g->u = C_MP(&c, "u"); |
| 237 | g->h = C_PTR(&c, "h", "Catacomb::HashClass"); |
| 238 | g->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global); |
| 239 | } |
| 240 | |
| 241 | void gdsa_pubfromsv(gdsa *g, SV *sv) |
| 242 | { |
| 243 | cursor c; |
| 244 | |
| 245 | c_init(&c, sv); |
| 246 | g->g = C_PTR(&c, "G", "Catacomb::Group"); |
| 247 | g->p = C_GE(&c, "p"); |
| 248 | c_skip(&c); |
| 249 | g->h = C_PTR(&c, "h", "Catacomb::HashClass"); |
| 250 | g->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global); |
| 251 | } |
| 252 | |
| 253 | /*----- RSA padding contexts ----------------------------------------------*/ |
| 254 | |
| 255 | void pkcs1_fromsv(pkcs1 *p, SV *sv) |
| 256 | { |
| 257 | cursor c; |
| 258 | STRLEN len; |
| 259 | SV *t; |
| 260 | |
| 261 | c_init(&c, sv); |
| 262 | t = c_get(&c, "ep", 0); |
| 263 | if (SvOK(t)) { |
| 264 | p->ep = SvPV(t, len); |
| 265 | p->epsz = len; |
| 266 | } else { |
| 267 | p->ep = 0; |
| 268 | p->epsz = 0; |
| 269 | } |
| 270 | p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global); |
| 271 | } |
| 272 | |
| 273 | void oaep_fromsv(oaep *p, SV *sv) |
| 274 | { |
| 275 | cursor c; |
| 276 | STRLEN len; |
| 277 | SV *t; |
| 278 | |
| 279 | c_init(&c, sv); |
| 280 | p->cc = C_PTR(&c, "c", "Catacomb::CipherClass"); |
| 281 | p->ch = C_PTR(&c, "h", "Catacomb::HashClass"); |
| 282 | t = c_get(&c, "ep", 0); |
| 283 | if (SvOK(t)) { |
| 284 | p->ep = SvPV(t, len); |
| 285 | p->epsz = len; |
| 286 | } else { |
| 287 | p->ep = 0; |
| 288 | p->epsz = 0; |
| 289 | } |
| 290 | p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global); |
| 291 | } |
| 292 | |
| 293 | void pss_fromsv(pss *p, SV *sv) |
| 294 | { |
| 295 | cursor c; |
| 296 | STRLEN len; |
| 297 | SV *t; |
| 298 | |
| 299 | c_init(&c, sv); |
| 300 | p->cc = C_PTR(&c, "c", "Catacomb::CipherClass"); |
| 301 | p->ch = C_PTR(&c, "h", "Catacomb::HashClass"); |
| 302 | t = c_get(&c, "ssz", 0); |
| 303 | p->ssz = SvOK(t) ? SvUV(t) : p->ch->hashsz; |
| 304 | p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global); |
| 305 | } |
| 306 | |
| 307 | /*----- Reconstructing various objects ------------------------------------*/ |
| 308 | |
| 309 | static SV *collect(SV *thing, ...) |
| 310 | { |
| 311 | va_list ap; |
| 312 | AV *av; |
| 313 | |
| 314 | va_start(ap, thing); |
| 315 | av = newAV(); |
| 316 | while (thing) { |
| 317 | av_push(av, thing); |
| 318 | thing = va_arg(ap, SV *); |
| 319 | } |
| 320 | va_end(ap); |
| 321 | return (newRV_noinc((SV *)av)); |
| 322 | } |
| 323 | |
| 324 | /* --- Somewhat unpleasant, really --- */ |
| 325 | |
| 326 | SV *info_field(field *f) |
| 327 | { |
| 328 | const char *n = F_NAME(f); |
| 329 | |
| 330 | if (strcmp(n, "prime") == 0 || strcmp(n, "niceprime") == 0 || |
| 331 | strcmp(n, "binpoly") == 0) |
| 332 | return (collect(newSVpv(n, 0), MAKE_MP(MP_COPY(f->m)), (SV *)0)); |
| 333 | else if (strcmp(n, "binnorm") == 0) { |
| 334 | fctx_binnorm *fc = (fctx_binnorm *)f; |
| 335 | return (collect(newSVpv(n, 0), |
| 336 | MAKE_MP(MP_COPY(f->m)), |
| 337 | MAKE_MP(MP_COPY(fc->ntop.r[fc->ntop.n - 1])), |
| 338 | (SV *)0)); |
| 339 | } else |
| 340 | return (&PL_sv_undef); |
| 341 | } |
| 342 | |
| 343 | field *copy_field(field *f) |
| 344 | { |
| 345 | if (strcmp(F_NAME(f), "prime") == 0) |
| 346 | f = field_prime(f->m); |
| 347 | else if (strcmp(F_NAME(f), "niceprime") == 0) |
| 348 | f = field_niceprime(f->m); |
| 349 | else if (strcmp(F_NAME(f), "binpoly") == 0) |
| 350 | f = field_binpoly(f->m); |
| 351 | else if (strcmp(F_NAME(f), "binnorm") == 0) { |
| 352 | fctx_binnorm *fc = (fctx_binnorm *)f; |
| 353 | f = field_binnorm(f->m, fc->ntop.r[fc->ntop.n - 1]); |
| 354 | } else |
| 355 | f = 0; |
| 356 | return (f); |
| 357 | } |
| 358 | |
| 359 | SV *info_curve(ec_curve *c) |
| 360 | { |
| 361 | field *f = c->f; |
| 362 | const char *n = EC_NAME(c); |
| 363 | SV *fsv; |
| 364 | mp *a, *b; |
| 365 | |
| 366 | fsv = info_field(f); |
| 367 | if (!SvOK(fsv)) |
| 368 | return (&PL_sv_undef); |
| 369 | a = F_OUT(f, MP_NEW, c->a); |
| 370 | b = F_OUT(f, MP_NEW, c->b); |
| 371 | if (strcmp(n, "prime") == 0 || strcmp(n, "primeproj") == 0 || |
| 372 | strcmp(n, "bin") == 0 || strcmp(n, "binproj") == 0) |
| 373 | return (collect(newSVpv(n, 0), fsv, MAKE_MP(a), MAKE_MP(b), (SV *)0)); |
| 374 | else { |
| 375 | MP_DROP(a); |
| 376 | MP_DROP(b); |
| 377 | SvREFCNT_dec(fsv); |
| 378 | return (&PL_sv_undef); |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | ec_curve *copy_curve(ec_curve *c) |
| 383 | { |
| 384 | field *f; |
| 385 | mp *a, *b; |
| 386 | |
| 387 | if ((f = copy_field(c->f)) == 0) |
| 388 | return (0); |
| 389 | a = F_OUT(f, MP_NEW, c->a); |
| 390 | b = F_OUT(f, MP_NEW, c->b); |
| 391 | if (strcmp(EC_NAME(c), "prime") == 0) |
| 392 | c = ec_prime(f, a, b); |
| 393 | else if (strcmp(EC_NAME(c), "primeproj") == 0) |
| 394 | c = ec_primeproj(f, a, b); |
| 395 | else if (strcmp(EC_NAME(c), "bin") == 0) |
| 396 | c = ec_bin(f, a, b); |
| 397 | else if (strcmp(EC_NAME(c), "binproj") == 0) |
| 398 | c = ec_binproj(f, a, b); |
| 399 | else |
| 400 | c = 0; |
| 401 | MP_DROP(a); |
| 402 | MP_DROP(b); |
| 403 | if (!c) F_DESTROY(f); |
| 404 | return (c); |
| 405 | } |
| 406 | |
| 407 | SV *info_group(group *g) |
| 408 | { |
| 409 | const char *n = G_NAME(g); |
| 410 | |
| 411 | if (strcmp(n, "prime") == 0) { |
| 412 | gctx_prime *gc = (gctx_prime *)g; |
| 413 | return (collect(newSVpv(n, 0), |
| 414 | MAKE_MP(MP_COPY(gc->mm.m)), |
| 415 | MAKE_MP(G_TOINT(g, MP_NEW, g->g)), |
| 416 | MAKE_MP(MP_COPY(gc->g.r)), |
| 417 | (SV *)0)); |
| 418 | } else if (strcmp(n, "bin") == 0) { |
| 419 | gctx_bin *gc = (gctx_bin *)g; |
| 420 | return (collect(newSVpv(n, 0), |
| 421 | MAKE_MP(MP_COPY(gc->r.p)), |
| 422 | MAKE_GF(G_TOINT(g, MP_NEW, g->g)), |
| 423 | MAKE_MP(MP_COPY(gc->g.r)), |
| 424 | (SV *)0)); |
| 425 | } else if (strcmp(n, "ec") == 0) { |
| 426 | gctx_ec *gc = (gctx_ec *)g; |
| 427 | SV *csv = info_curve(gc->ei.c); |
| 428 | ec *gen; |
| 429 | if (!SvOK(csv)) |
| 430 | return (&PL_sv_undef); |
| 431 | gen = CREATE(ec); |
| 432 | EC_CREATE(gen); |
| 433 | EC_COPY(gen, &gc->ei.g); |
| 434 | return (collect(newSVpv(n, 0), |
| 435 | csv, |
| 436 | MAKE(gen, "Catacomb::EC::Point"), |
| 437 | MAKE_MP(MP_COPY(gc->ei.r)), |
| 438 | MAKE_MP(MP_COPY(gc->ei.h)), |
| 439 | (SV *)0)); |
| 440 | } else |
| 441 | return (&PL_sv_undef); |
| 442 | } |
| 443 | |
| 444 | group *copy_group(group *g) |
| 445 | { |
| 446 | if (strcmp(G_NAME(g), "prime") == 0) { |
| 447 | gctx_prime *gc = (gctx_prime *)g; |
| 448 | gprime_param gp; |
| 449 | gp.g = G_TOINT(g, MP_NEW, g->g); |
| 450 | gp.p = gc->mm.m; |
| 451 | gp.q = gc->g.r; |
| 452 | g = group_prime(&gp); |
| 453 | MP_DROP(gp.g); |
| 454 | } else if (strcmp(G_NAME(g), "bin") == 0) { |
| 455 | gctx_bin *gc = (gctx_bin *)g; |
| 456 | gbin_param gb; |
| 457 | gb.g = G_TOINT(g, MP_NEW, g->g); |
| 458 | gb.p = gc->r.p; |
| 459 | gb.q = gc->g.r; |
| 460 | g = group_binary(&gb); |
| 461 | MP_DROP(gb.g); |
| 462 | } else if (strcmp(G_NAME(g), "ec") == 0) { |
| 463 | gctx_ec *gc = (gctx_ec *)g; |
| 464 | ec_info ei; |
| 465 | if ((ei.c = copy_curve(gc->ei.c)) == 0) |
| 466 | return (0); |
| 467 | EC_CREATE(&ei.g); |
| 468 | EC_COPY(&ei.g, &gc->ei.g); |
| 469 | ei.r = MP_COPY(gc->ei.r); |
| 470 | ei.h = MP_COPY(gc->ei.h); |
| 471 | g = group_ec(&ei); |
| 472 | } else |
| 473 | g = 0; |
| 474 | return (g); |
| 475 | } |
| 476 | |
| 477 | /*----- That's all, folks -------------------------------------------------*/ |