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 *parse_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_curve(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         cname = p + 1;
 119         while(isspace(*cname))
 120                 cname++;
 121         p = strchr(cname, ']');
 122         if (!p)
 123                 {
 124                 fprintf(stderr, "Parse error: missing ]\n");
 125                 return NID_undef;
 126                 }
 127         *p = 0;
 128
 129         if (!strcmp(cname, "B-163"))
 130                 return NID_sect163r2;
 131         if (!strcmp(cname, "B-233"))
 132                 return NID_sect233r1;
 133         if (!strcmp(cname, "B-283"))
 134                 return NID_sect283r1;
 135         if (!strcmp(cname, "B-409"))
 136                 return NID_sect409r1;
 137         if (!strcmp(cname, "B-571"))
 138                 return NID_sect571r1;
 139         if (!strcmp(cname, "K-163"))
 140                 return NID_sect163k1;
 141         if (!strcmp(cname, "K-233"))
 142                 return NID_sect233k1;
 143         if (!strcmp(cname, "K-283"))
 144                 return NID_sect283k1;
 145         if (!strcmp(cname, "K-409"))
 146                 return NID_sect409k1;
 147         if (!strcmp(cname, "K-571"))
 148                 return NID_sect571k1;
 149         if (!strcmp(cname, "P-192"))
 150                 return NID_X9_62_prime192v1;
 151         if (!strcmp(cname, "P-224"))
 152                 return NID_secp224r1;
 153         if (!strcmp(cname, "P-256"))
 154                 return NID_X9_62_prime256v1;
 155         if (!strcmp(cname, "P-384"))
 156                 return NID_secp384r1;
 157         if (!strcmp(cname, "P-521"))
 158                 return NID_secp521r1;
 159
 160         fprintf(stderr, "Unknown Curve name %s\n", cname);
 161         return NID_undef;
 162         }
 163
 164 static EC_POINT *make_peer(EC_GROUP *group, BIGNUM *x, BIGNUM *y)
 165         {
 166         EC_POINT *peer;
 167         int rv;
 168         BN_CTX *c;
 169         peer = EC_POINT_new(group);
 170         if (!peer)
 171                 return NULL;
 172         c = BN_CTX_new();
 173         if (EC_METHOD_get_field_type(EC_GROUP_method_of(group))
 174                 == NID_X9_62_characteristic_two_field)
 175                 rv = EC_POINT_set_affine_coordinates_GF2m(group, peer, x, y, c);
 176         else
 177                 rv = EC_POINT_set_affine_coordinates_GFp(group, peer, x, y, c);
 178
 179         BN_CTX_free(c);
 180         if (rv)
 181                 return peer;
 182         EC_POINT_free(peer);
 183         return NULL;
 184         }
 185
 186 static int ec_print_pubkey(FILE *out, EC_KEY *key)
 187         {
 188         const EC_POINT *pt;
 189         const EC_GROUP *grp;
 190         const EC_METHOD *meth;
 191         int rv;
 192         BIGNUM *tx, *ty;
 193         BN_CTX *ctx;
 194         ctx = BN_CTX_new();
 195         if (!ctx)
 196                 return 0;
 197         tx = BN_CTX_get(ctx);
 198         ty = BN_CTX_get(ctx);
 199         if (!tx || !ty)
 200                 return 0;
 201         grp = EC_KEY_get0_group(key);
 202         pt = EC_KEY_get0_public_key(key);
 203         meth = EC_GROUP_method_of(grp);
 204         if (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field)
 205                 rv = EC_POINT_get_affine_coordinates_GFp(grp, pt, tx, ty, ctx);
 206         else
 207                 rv = EC_POINT_get_affine_coordinates_GF2m(grp, pt, tx, ty, ctx);
 208
 209         do_bn_print_name(out, "QeIUTx", tx);
 210         do_bn_print_name(out, "QeIUTy", ty);
 211
 212         BN_CTX_free(ctx);
 213
 214         return rv;
 215
 216         }
 217
 218 static void ec_output_Zhash(FILE *out, int exout, EC_GROUP *group,
 219                         BIGNUM *ix, BIGNUM *iy, BIGNUM *id, BIGNUM *cx,
 220                         BIGNUM *cy, const EVP_MD *md,
 221                                 unsigned char *rhash, size_t rhashlen)
 222         {
 223         EC_KEY *ec = NULL;
 224         EC_POINT *peerkey = NULL;
 225         unsigned char *Z;
 226         unsigned char chash[EVP_MAX_MD_SIZE];
 227         int Zlen;
 228         ec = EC_KEY_new();
 229         EC_KEY_set_group(ec, group);
 230         peerkey = make_peer(group, cx, cy);
 231         if (rhash == NULL)
 232                 {
 233                 rhashlen = M_EVP_MD_size(md);
 234                 EC_KEY_generate_key(ec);
 235                 ec_print_pubkey(out, ec);
 236                 }
 237         else
 238                 {
 239                 EC_KEY_set_public_key_affine_coordinates(ec, ix, iy);
 240                 EC_KEY_set_private_key(ec, id);
 241                 }
 242         Zlen = (EC_GROUP_get_degree(group) + 7)/8;
 243         Z = OPENSSL_malloc(Zlen);
 244         if (!Z)
 245                 exit(1);
 246         ECDH_compute_key(Z, Zlen, peerkey, ec, 0);
 247         if (exout)
 248                 OutputValue("Z", Z, Zlen, out, 0);
 249         FIPS_digest(Z, Zlen, chash, NULL, md);
 250         OutputValue(rhash ? "IUTHashZZ" : "HashZZ", chash, rhashlen, out, 0);
 251         if (rhash)
 252                 {
 253                 fprintf(out, "Result = %s\n",
 254                                 memcmp(chash, rhash, rhashlen) ? "F" : "P");
 255                 }
 256         OPENSSL_cleanse(Z, Zlen);
 257         OPENSSL_free(Z);
 258         EC_KEY_free(ec);
 259         EC_POINT_free(peerkey);
 260         }
 261
 262 int main(int argc,char **argv)
 263         {
 264         char **args = argv + 1;
 265         int argn = argc - 1;
 266         FILE *in, *out;
 267         char buf[2048], lbuf[2048];
 268         unsigned char *rhash;
 269         long rhashlen;
 270         BIGNUM *cx = NULL, *cy = NULL;
 271         BIGNUM *id = NULL, *ix = NULL, *iy = NULL;
 272         const EVP_MD *md = NULL;
 273         EC_GROUP *group = NULL;
 274         char *keyword = NULL, *value = NULL;
 275         int do_verify = -1, exout = 0;
 276
 277         int curve_nids[5] = {0,0,0,0,0};
 278         int param_set = -1;
 279
 280         fips_set_error_print();
 281         if(!FIPS_mode_set(1))
 282                 exit(1);
 283
 284         if (argn && !strcmp(*args, "ecdhver"))
 285                 {
 286                 do_verify = 1;
 287                 args++;
 288                 argn--;
 289                 }
 290         else if (argn && !strcmp(*args, "ecdhgen"))
 291                 {
 292                 do_verify = 0;
 293                 args++;
 294                 argn--;
 295                 }
 296
 297         if (argn && !strcmp(*args, "-exout"))
 298                 {
 299                 exout = 1;
 300                 args++;
 301                 argn--;
 302                 }
 303
 304         if (do_verify == -1)
 305                 {
 306                 fprintf(stderr,"%s [ecdhver|ecdhgen|] [-exout] (infile outfile)\n",argv[0]);
 307                 exit(1);
 308                 }
 309
 310         if (argn == 2)
 311                 {
 312                 in = fopen(*args, "r");
 313                 if (!in)
 314                         {
 315                         fprintf(stderr, "Error opening input file\n");
 316                         exit(1);
 317                         }
 318                 out = fopen(args[1], "w");
 319                 if (!out)
 320                         {
 321                         fprintf(stderr, "Error opening output file\n");
 322                         exit(1);
 323                         }
 324                 }
 325         else if (argn == 0)
 326                 {
 327                 in = stdin;
 328                 out = stdout;
 329                 }
 330         else
 331                 {
 332                 fprintf(stderr,"%s [dhver|dhgen|] [-exout] (infile outfile)\n",argv[0]);
 333                 exit(1);
 334                 }
 335
 336         while (fgets(buf, sizeof(buf), in) != NULL)
 337                 {
 338                 fputs(buf, out);
 339                 if (buf[0] == '[' && buf[1] == 'E')
 340                         {
 341                         int c = buf[2];
 342                         if (c < 'A' || c > 'E')
 343                                 goto parse_error;
 344                         param_set = c - 'A';
 345                         /* If just [E?] then initial paramset */
 346                         if (buf[3] == ']')
 347                                 continue;
 348                         if (group)
 349                                 EC_GROUP_free(group);
 350                         group = EC_GROUP_new_by_curve_name(curve_nids[c - 'A']);
 351                         }
 352                 if (strlen(buf) > 10 && !strncmp(buf, "[Curve", 6))
 353                         {
 354                         int nid;
 355                         if (param_set == -1)
 356                                 goto parse_error;
 357                         nid = lookup_curve(buf);
 358                         if (nid == NID_undef)
 359                                 goto parse_error;
 360                         curve_nids[param_set] = nid;
 361                         }
 362
 363                 if (strlen(buf) > 6 && !strncmp(buf, "[E", 2))
 364                         {
 365                         md = parse_md(buf);
 366                         if (md == NULL)
 367                                 goto parse_error;
 368                         continue;
 369                         }
 370                 if (!parse_line(&keyword, &value, lbuf, buf))
 371                         continue;
 372                 if (!strcmp(keyword, "QeCAVSx"))
 373                         {
 374                         if (!do_hex2bn(&cx, value))
 375                                 goto parse_error;
 376                         }
 377                 else if (!strcmp(keyword, "QeCAVSy"))
 378                         {
 379                         if (!do_hex2bn(&cy, value))
 380                                 goto parse_error;
 381                         if (do_verify == 0)
 382                                 ec_output_Zhash(out, exout, group,
 383                                                 NULL, NULL, NULL,
 384                                                 cx, cy, md, rhash, rhashlen);
 385                         }
 386                 else if (!strcmp(keyword, "deIUT"))
 387                         {
 388                         if (!do_hex2bn(&id, value))
 389                                 goto parse_error;
 390                         }
 391                 else if (!strcmp(keyword, "QeIUTx"))
 392                         {
 393                         if (!do_hex2bn(&ix, value))
 394                                 goto parse_error;
 395                         }
 396                 else if (!strcmp(keyword, "QeIUTy"))
 397                         {
 398                         if (!do_hex2bn(&iy, value))
 399                                 goto parse_error;
 400                         }
 401                 else if (!strcmp(keyword, "CAVSHashZZ"))
 402                         {
 403                         if (!md)
 404                                 goto parse_error;
 405                         rhash = hex2bin_m(value, &rhashlen);
 406                         if (!rhash || rhashlen != M_EVP_MD_size(md))
 407                                 goto parse_error;
 408                         ec_output_Zhash(out, exout, group, ix, iy, id, cx, cy,
 409                                         md, rhash, rhashlen);
 410                         }
 411                 }
 412         return 0;
 413         parse_error:
 414         fprintf(stderr, "Error Parsing request file\n");
 415         exit(1);
 416         }
 417
 418 #endif