fips/ecdh/fips_ecdhvs.c

   1 /* fips/ecdh/fips_ecdhvs.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2011 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  */
  53
  54
  55 #define OPENSSL_FIPSAPI
  56 #include <openssl/opensslconf.h>
  57
  58 #ifndef OPENSSL_FIPS
  59 #include <stdio.h>
  60
  61 int main(int argc, char **argv)
  62 {
  63     printf("No FIPS ECDH support\n");
  64     return(0);
  65 }
  66 #else
  67
  68 #include <openssl/crypto.h>
  69 #include <openssl/bn.h>
  70 #include <openssl/ecdh.h>
  71 #include <openssl/fips.h>
  72 #include <openssl/err.h>
  73 #include <openssl/evp.h>
  74 #include <string.h>
  75 #include <ctype.h>
  76
  77 #include "fips_utl.h"
  78
  79 static const EVP_MD *eparse_md(char *line)
  80         {
  81         char *p;
  82         if (line[0] != '[' || line[1] != 'E')
  83                 return NULL;
  84         p = strchr(line, '-');
  85         if (!p)
  86                 return NULL;
  87         line = p + 1;
  88         p = strchr(line, ']');
  89         if (!p)
  90                 return NULL;
  91         *p = 0;
  92         p = line;
  93         while(isspace(*p))
  94                 p++;
  95         if (!strcmp(p, "SHA1"))
  96                 return EVP_sha1();
  97         else if (!strcmp(p, "SHA224"))
  98                 return EVP_sha224();
  99         else if (!strcmp(p, "SHA256"))
 100                 return EVP_sha256();
 101         else if (!strcmp(p, "SHA384"))
 102                 return EVP_sha384();
 103         else if (!strcmp(p, "SHA512"))
 104                 return EVP_sha512();
 105         else
 106                 return NULL;
 107         }
 108
 109 static int lookup_curve2(char *cname)
 110         {
 111         char *p;
 112         p = strchr(cname, ']');
 113         if (!p)
 114                 {
 115                 fprintf(stderr, "Parse error: missing ]\n");
 116                 return NID_undef;
 117                 }
 118         *p = 0;
 119
 120         if (!strcmp(cname, "B-163"))
 121                 return NID_sect163r2;
 122         if (!strcmp(cname, "B-233"))
 123                 return NID_sect233r1;
 124         if (!strcmp(cname, "B-283"))
 125                 return NID_sect283r1;
 126         if (!strcmp(cname, "B-409"))
 127                 return NID_sect409r1;
 128         if (!strcmp(cname, "B-571"))
 129                 return NID_sect571r1;
 130         if (!strcmp(cname, "K-163"))
 131                 return NID_sect163k1;
 132         if (!strcmp(cname, "K-233"))
 133                 return NID_sect233k1;
 134         if (!strcmp(cname, "K-283"))
 135                 return NID_sect283k1;
 136         if (!strcmp(cname, "K-409"))
 137                 return NID_sect409k1;
 138         if (!strcmp(cname, "K-571"))
 139                 return NID_sect571k1;
 140         if (!strcmp(cname, "P-192"))
 141                 return NID_X9_62_prime192v1;
 142         if (!strcmp(cname, "P-224"))
 143                 return NID_secp224r1;
 144         if (!strcmp(cname, "P-256"))
 145                 return NID_X9_62_prime256v1;
 146         if (!strcmp(cname, "P-384"))
 147                 return NID_secp384r1;
 148         if (!strcmp(cname, "P-521"))
 149                 return NID_secp521r1;
 150
 151         fprintf(stderr, "Unknown Curve name %s\n", cname);
 152         return NID_undef;
 153         }
 154
 155 static int lookup_curve(char *cname)
 156         {
 157         char *p;
 158         p = strchr(cname, ':');
 159         if (!p)
 160                 {
 161                 fprintf(stderr, "Parse error: missing :\n");
 162                 return NID_undef;
 163                 }
 164         cname = p + 1;
 165         while(isspace(*cname))
 166                 cname++;
 167         return lookup_curve2(cname);
 168         }
 169
 170 static EC_POINT *make_peer(EC_GROUP *group, BIGNUM *x, BIGNUM *y)
 171         {
 172         EC_POINT *peer;
 173         int rv;
 174         BN_CTX *c;
 175         peer = EC_POINT_new(group);
 176         if (!peer)
 177                 return NULL;
 178         c = BN_CTX_new();
 179         if (EC_METHOD_get_field_type(EC_GROUP_method_of(group))
 180                 == NID_X9_62_prime_field)
 181                 rv = EC_POINT_set_affine_coordinates_GFp(group, peer, x, y, c);
 182         else
 183 #ifdef OPENSSL_NO_EC2M
 184                 {
 185                 fprintf(stderr, "ERROR: GF2m not supported\n");
 186                 exit(1);
 187                 }
 188 #else
 189                 rv = EC_POINT_set_affine_coordinates_GF2m(group, peer, x, y, c);
 190 #endif
 191
 192         BN_CTX_free(c);
 193         if (rv)
 194                 return peer;
 195         EC_POINT_free(peer);
 196         return NULL;
 197         }
 198
 199 static int ec_print_key(FILE *out, EC_KEY *key, int add_e, int exout)
 200         {
 201         const EC_POINT *pt;
 202         const EC_GROUP *grp;
 203         const EC_METHOD *meth;
 204         int rv;
 205         BIGNUM *tx, *ty;
 206         const BIGNUM *d = NULL;
 207         BN_CTX *ctx;
 208         ctx = BN_CTX_new();
 209         if (!ctx)
 210                 return 0;
 211         tx = BN_CTX_get(ctx);
 212         ty = BN_CTX_get(ctx);
 213         if (!tx || !ty)
 214                 return 0;
 215         grp = EC_KEY_get0_group(key);
 216         pt = EC_KEY_get0_public_key(key);
 217         if (exout)
 218                 d = EC_KEY_get0_private_key(key);
 219         meth = EC_GROUP_method_of(grp);
 220         if (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field)
 221                 rv = EC_POINT_get_affine_coordinates_GFp(grp, pt, tx, ty, ctx);
 222         else
 223 #ifdef OPENSSL_NO_EC2M
 224                 {
 225                 fprintf(stderr, "ERROR: GF2m not supported\n");
 226                 exit(1);
 227                 }
 228 #else
 229                 rv = EC_POINT_get_affine_coordinates_GF2m(grp, pt, tx, ty, ctx);
 230 #endif
 231
 232         if (add_e)
 233                 {
 234                 do_bn_print_name(out, "QeIUTx", tx);
 235                 do_bn_print_name(out, "QeIUTy", ty);
 236                 if (d)
 237                         do_bn_print_name(out, "QeIUTd", d);
 238                 }
 239         else
 240                 {
 241                 do_bn_print_name(out, "QIUTx", tx);
 242                 do_bn_print_name(out, "QIUTy", ty);
 243                 if (d)
 244                         do_bn_print_name(out, "QIUTd", d);
 245                 }
 246
 247         BN_CTX_free(ctx);
 248
 249         return rv;
 250
 251         }
 252
 253 static void ec_output_Zhash(FILE *out, int exout, EC_GROUP *group,
 254                         BIGNUM *ix, BIGNUM *iy, BIGNUM *id, BIGNUM *cx,
 255                         BIGNUM *cy, const EVP_MD *md,
 256                                 unsigned char *rhash, size_t rhashlen)
 257         {
 258         EC_KEY *ec = NULL;
 259         EC_POINT *peerkey = NULL;
 260         unsigned char *Z;
 261         unsigned char chash[EVP_MAX_MD_SIZE];
 262         int Zlen;
 263         ec = EC_KEY_new();
 264         EC_KEY_set_group(ec, group);
 265         peerkey = make_peer(group, cx, cy);
 266         if (rhash == NULL)
 267                 {
 268                 if (md)
 269                         rhashlen = M_EVP_MD_size(md);
 270                 EC_KEY_generate_key(ec);
 271                 ec_print_key(out, ec, md ? 1 : 0, exout);
 272                 }
 273         else
 274                 {
 275                 EC_KEY_set_public_key_affine_coordinates(ec, ix, iy);
 276                 EC_KEY_set_private_key(ec, id);
 277                 }
 278         Zlen = (EC_GROUP_get_degree(group) + 7)/8;
 279         Z = OPENSSL_malloc(Zlen);
 280         if (!Z)
 281                 exit(1);
 282         ECDH_compute_key(Z, Zlen, peerkey, ec, 0);
 283         if (md)
 284                 {
 285                 if (exout)
 286                         OutputValue("Z", Z, Zlen, out, 0);
 287                 FIPS_digest(Z, Zlen, chash, NULL, md);
 288                 OutputValue(rhash ? "IUTHashZZ" : "HashZZ",
 289                                                 chash, rhashlen, out, 0);
 290                 if (rhash)
 291                         {
 292                         fprintf(out, "Result = %s\n",
 293                                 memcmp(chash, rhash, rhashlen) ? "F" : "P");
 294                         }
 295                 }
 296         else
 297                 OutputValue("ZIUT", Z, Zlen, out, 0);
 298         OPENSSL_cleanse(Z, Zlen);
 299         OPENSSL_free(Z);
 300         EC_KEY_free(ec);
 301         EC_POINT_free(peerkey);
 302         }
 303
 304 #ifdef FIPS_ALGVS
 305 int fips_ecdhvs_main(int argc, char **argv)
 306 #else
 307 int main(int argc, char **argv)
 308 #endif
 309         {
 310         char **args = argv + 1;
 311         int argn = argc - 1;
 312         FILE *in, *out;
 313         char buf[2048], lbuf[2048];
 314         unsigned char *rhash = NULL;
 315         long rhashlen;
 316         BIGNUM *cx = NULL, *cy = NULL;
 317         BIGNUM *id = NULL, *ix = NULL, *iy = NULL;
 318         const EVP_MD *md = NULL;
 319         EC_GROUP *group = NULL;
 320         char *keyword = NULL, *value = NULL;
 321         int do_verify = -1, exout = 0;
 322
 323         int curve_nids[5] = {0,0,0,0,0};
 324         int param_set = -1;
 325
 326         fips_algtest_init();
 327
 328         if (argn && !strcmp(*args, "ecdhver"))
 329                 {
 330                 do_verify = 1;
 331                 args++;
 332                 argn--;
 333                 }
 334         else if (argn && !strcmp(*args, "ecdhgen"))
 335                 {
 336                 do_verify = 0;
 337                 args++;
 338                 argn--;
 339                 }
 340
 341         if (argn && !strcmp(*args, "-exout"))
 342                 {
 343                 exout = 1;
 344                 args++;
 345                 argn--;
 346                 }
 347
 348         if (do_verify == -1)
 349                 {
 350                 fprintf(stderr,"%s [ecdhver|ecdhgen|] [-exout] (infile outfile)\n",argv[0]);
 351                 exit(1);
 352                 }
 353
 354         if (argn == 2)
 355                 {
 356                 in = fopen(*args, "r");
 357                 if (!in)
 358                         {
 359                         fprintf(stderr, "Error opening input file\n");
 360                         exit(1);
 361                         }
 362                 out = fopen(args[1], "w");
 363                 if (!out)
 364                         {
 365                         fprintf(stderr, "Error opening output file\n");
 366                         exit(1);
 367                         }
 368                 }
 369         else if (argn == 0)
 370                 {
 371                 in = stdin;
 372                 out = stdout;
 373                 }
 374         else
 375                 {
 376                 fprintf(stderr,"%s [dhver|dhgen|] [-exout] (infile outfile)\n",argv[0]);
 377                 exit(1);
 378                 }
 379
 380         while (fgets(buf, sizeof(buf), in) != NULL)
 381                 {
 382                 fputs(buf, out);
 383                 if (buf[0] == '[' && buf[1] == 'E')
 384                         {
 385                         int c = buf[2];
 386                         if (c < 'A' || c > 'E')
 387                                 goto parse_error;
 388                         param_set = c - 'A';
 389                         /* If just [E?] then initial paramset */
 390                         if (buf[3] == ']')
 391                                 continue;
 392                         if (group)
 393                                 EC_GROUP_free(group);
 394                         group = EC_GROUP_new_by_curve_name(curve_nids[c - 'A']);
 395                         }
 396                 if (strlen(buf) > 10 && !strncmp(buf, "[Curve", 6))
 397                         {
 398                         int nid;
 399                         if (param_set == -1)
 400                                 goto parse_error;
 401                         nid = lookup_curve(buf);
 402                         if (nid == NID_undef)
 403                                 goto parse_error;
 404                         curve_nids[param_set] = nid;
 405                         }
 406
 407                 if (strlen(buf) > 4 && buf[0] == '[' && buf[2] == '-')
 408                         {
 409                         int nid = lookup_curve2(buf + 1);
 410                         if (nid == NID_undef)
 411                                 goto parse_error;
 412                         if (group)
 413                                 EC_GROUP_free(group);
 414                         group = EC_GROUP_new_by_curve_name(nid);
 415                         }
 416
 417                 if (strlen(buf) > 6 && !strncmp(buf, "[E", 2))
 418                         {
 419                         md = eparse_md(buf);
 420                         if (md == NULL)
 421                                 goto parse_error;
 422                         continue;
 423                         }
 424                 if (!parse_line(&keyword, &value, lbuf, buf))
 425                         continue;
 426                 if (!strcmp(keyword, "QeCAVSx") || !strcmp(keyword, "QCAVSx"))
 427                         {
 428                         if (!do_hex2bn(&cx, value))
 429                                 goto parse_error;
 430                         }
 431                 else if (!strcmp(keyword, "QeCAVSy") || !strcmp(keyword, "QCAVSy"))
 432                         {
 433                         if (!do_hex2bn(&cy, value))
 434                                 goto parse_error;
 435                         if (do_verify == 0)
 436                                 ec_output_Zhash(out, exout, group,
 437                                                 NULL, NULL, NULL,
 438                                                 cx, cy, md, rhash, rhashlen);
 439                         }
 440                 else if (!strcmp(keyword, "deIUT"))
 441                         {
 442                         if (!do_hex2bn(&id, value))
 443                                 goto parse_error;
 444                         }
 445                 else if (!strcmp(keyword, "QeIUTx"))
 446                         {
 447                         if (!do_hex2bn(&ix, value))
 448                                 goto parse_error;
 449                         }
 450                 else if (!strcmp(keyword, "QeIUTy"))
 451                         {
 452                         if (!do_hex2bn(&iy, value))
 453                                 goto parse_error;
 454                         }
 455                 else if (!strcmp(keyword, "CAVSHashZZ"))
 456                         {
 457                         if (!md)
 458                                 goto parse_error;
 459                         rhash = hex2bin_m(value, &rhashlen);
 460                         if (!rhash || rhashlen != M_EVP_MD_size(md))
 461                                 goto parse_error;
 462                         ec_output_Zhash(out, exout, group, ix, iy, id, cx, cy,
 463                                         md, rhash, rhashlen);
 464                         }
 465                 }
 466         return 0;
 467         parse_error:
 468         fprintf(stderr, "Error Parsing request file\n");
 469         exit(1);
 470         }
 471
 472 #endif