crypto/ec/eck_prn.c

   1 /* crypto/ec/eck_prn.c */
   2 /*
   3  * Written by Nils Larsch for the OpenSSL project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1998-2005 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  *    openssl-core@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  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58 /* ====================================================================
  59  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
  60  * Portions originally developed by SUN MICROSYSTEMS, INC., and
  61  * contributed to the OpenSSL project.
  62  */
  63
  64 #include <stdio.h>
  65 #include "cryptlib.h"
  66 #include <openssl/evp.h>
  67 #include <openssl/ec.h>
  68 #include <openssl/bn.h>
  69
  70 #ifndef OPENSSL_NO_STDIO
  71 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off)
  72         {
  73         BIO *b;
  74         int ret;
  75
  76         if ((b=BIO_new(BIO_s_file())) == NULL)
  77                 {
  78                 ECerr(EC_F_ECPKPARAMETERS_PRINT_FP,ERR_R_BUF_LIB);
  79                 return(0);
  80                 }
  81         BIO_set_fp(b, fp, BIO_NOCLOSE);
  82         ret = ECPKParameters_print(b, x, off);
  83         BIO_free(b);
  84         return(ret);
  85         }
  86
  87 int EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off)
  88         {
  89         BIO *b;
  90         int ret;
  91
  92         if ((b=BIO_new(BIO_s_file())) == NULL)
  93                 {
  94                 ECerr(EC_F_EC_KEY_PRINT_FP, ERR_R_BIO_LIB);
  95                 return(0);
  96                 }
  97         BIO_set_fp(b, fp, BIO_NOCLOSE);
  98         ret = EC_KEY_print(b, x, off);
  99         BIO_free(b);
 100         return(ret);
 101         }
 102
 103 int ECParameters_print_fp(FILE *fp, const EC_KEY *x)
 104         {
 105         BIO *b;
 106         int ret;
 107
 108         if ((b=BIO_new(BIO_s_file())) == NULL)
 109                 {
 110                 ECerr(EC_F_ECPARAMETERS_PRINT_FP, ERR_R_BIO_LIB);
 111                 return(0);
 112                 }
 113         BIO_set_fp(b, fp, BIO_NOCLOSE);
 114         ret = ECParameters_print(b, x);
 115         BIO_free(b);
 116         return(ret);
 117         }
 118 #endif
 119
 120 int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
 121         {
 122         EVP_PKEY *pk;
 123         int ret;
 124         pk = EVP_PKEY_new();
 125         if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
 126                 return 0;
 127         ret = EVP_PKEY_print_private(bp, pk, off, NULL);
 128         EVP_PKEY_free(pk);
 129         return ret;
 130         }
 131
 132 int ECParameters_print(BIO *bp, const EC_KEY *x)
 133         {
 134         EVP_PKEY *pk;
 135         int ret;
 136         pk = EVP_PKEY_new();
 137         if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
 138                 return 0;
 139         ret = EVP_PKEY_print_params(bp, pk, 4, NULL);
 140         EVP_PKEY_free(pk);
 141         return ret;
 142         }
 143
 144 static int print_bin(BIO *fp, const char *str, const unsigned char *num,
 145                 size_t len, int off);
 146
 147 int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
 148         {
 149         unsigned char *buffer=NULL;
 150         size_t  buf_len=0, i;
 151         int     ret=0, reason=ERR_R_BIO_LIB;
 152         BN_CTX  *ctx=NULL;
 153         const EC_POINT *point=NULL;
 154         BIGNUM  *p=NULL, *a=NULL, *b=NULL, *gen=NULL,
 155                 *order=NULL, *cofactor=NULL;
 156         const unsigned char *seed;
 157         size_t  seed_len=0;
 158
 159         static const char *gen_compressed = "Generator (compressed):";
 160         static const char *gen_uncompressed = "Generator (uncompressed):";
 161         static const char *gen_hybrid = "Generator (hybrid):";
 162
 163         if (!x)
 164                 {
 165                 reason = ERR_R_PASSED_NULL_PARAMETER;
 166                 goto err;
 167                 }
 168
 169         ctx = BN_CTX_new();
 170         if (ctx == NULL)
 171                 {
 172                 reason = ERR_R_MALLOC_FAILURE;
 173                 goto err;
 174                 }
 175
 176         if (EC_GROUP_get_asn1_flag(x))
 177                 {
 178                 /* the curve parameter are given by an asn1 OID */
 179                 int nid;
 180                 const char *nname;
 181
 182                 if (!BIO_indent(bp, off, 128))
 183                         goto err;
 184
 185                 nid = EC_GROUP_get_curve_name(x);
 186                 if (nid == 0)
 187                         goto err;
 188                 if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
 189                         goto err;
 190                 if (BIO_printf(bp, "\n") <= 0)
 191                         goto err;
 192                 nname = EC_curve_nid2nist(nid);
 193                 if (nname)
 194                         {
 195                         if (!BIO_indent(bp, off, 128))
 196                                 goto err;
 197                         if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
 198                                 goto err;
 199                         }
 200                 }
 201         else
 202                 {
 203                 /* explicit parameters */
 204                 int is_char_two = 0;
 205                 point_conversion_form_t form;
 206                 int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));
 207
 208                 if (tmp_nid == NID_X9_62_characteristic_two_field)
 209                         is_char_two = 1;
 210
 211                 if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
 212                         (b = BN_new()) == NULL || (order = BN_new()) == NULL ||
 213                         (cofactor = BN_new()) == NULL)
 214                         {
 215                         reason = ERR_R_MALLOC_FAILURE;
 216                         goto err;
 217                         }
 218 #ifndef OPENSSL_NO_EC2M
 219                 if (is_char_two)
 220                         {
 221                         if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx))
 222                                 {
 223                                 reason = ERR_R_EC_LIB;
 224                                 goto err;
 225                                 }
 226                         }
 227                 else /* prime field */
 228 #endif
 229                         {
 230                         if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx))
 231                                 {
 232                                 reason = ERR_R_EC_LIB;
 233                                 goto err;
 234                                 }
 235                         }
 236
 237                 if ((point = EC_GROUP_get0_generator(x)) == NULL)
 238                         {
 239                         reason = ERR_R_EC_LIB;
 240                         goto err;
 241                         }
 242                 if (!EC_GROUP_get_order(x, order, NULL) ||
 243                         !EC_GROUP_get_cofactor(x, cofactor, NULL))
 244                         {
 245                         reason = ERR_R_EC_LIB;
 246                         goto err;
 247                         }
 248
 249                 form = EC_GROUP_get_point_conversion_form(x);
 250
 251                 if ((gen = EC_POINT_point2bn(x, point,
 252                                 form, NULL, ctx)) == NULL)
 253                         {
 254                         reason = ERR_R_EC_LIB;
 255                         goto err;
 256                         }
 257
 258                 buf_len = (size_t)BN_num_bytes(p);
 259                 if (buf_len < (i = (size_t)BN_num_bytes(a)))
 260                         buf_len = i;
 261                 if (buf_len < (i = (size_t)BN_num_bytes(b)))
 262                         buf_len = i;
 263                 if (buf_len < (i = (size_t)BN_num_bytes(gen)))
 264                         buf_len = i;
 265                 if (buf_len < (i = (size_t)BN_num_bytes(order)))
 266                         buf_len = i;
 267                 if (buf_len < (i = (size_t)BN_num_bytes(cofactor)))
 268                         buf_len = i;
 269
 270                 if ((seed = EC_GROUP_get0_seed(x)) != NULL)
 271                         seed_len = EC_GROUP_get_seed_len(x);
 272
 273                 buf_len += 10;
 274                 if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
 275                         {
 276                         reason = ERR_R_MALLOC_FAILURE;
 277                         goto err;
 278                         }
 279
 280                 if (!BIO_indent(bp, off, 128))
 281                         goto err;
 282
 283                 /* print the 'short name' of the field type */
 284                 if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
 285                         <= 0)
 286                         goto err;
 287
 288                 if (is_char_two)
 289                         {
 290                         /* print the 'short name' of the base type OID */
 291                         int basis_type = EC_GROUP_get_basis_type(x);
 292                         if (basis_type == 0)
 293                                 goto err;
 294
 295                         if (!BIO_indent(bp, off, 128))
 296                                 goto err;
 297
 298                         if (BIO_printf(bp, "Basis Type: %s\n",
 299                                 OBJ_nid2sn(basis_type)) <= 0)
 300                                 goto err;
 301
 302                         /* print the polynomial */
 303                         if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
 304                                 off))
 305                                 goto err;
 306                         }
 307                 else
 308                         {
 309                         if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer,off))
 310                                 goto err;
 311                         }
 312                 if ((a != NULL) && !ASN1_bn_print(bp, "A:   ", a, buffer, off))
 313                         goto err;
 314                 if ((b != NULL) && !ASN1_bn_print(bp, "B:   ", b, buffer, off))
 315                         goto err;
 316                 if (form == POINT_CONVERSION_COMPRESSED)
 317                         {
 318                         if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
 319                                 buffer, off))
 320                                 goto err;
 321                         }
 322                 else if (form == POINT_CONVERSION_UNCOMPRESSED)
 323                         {
 324                         if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
 325                                 buffer, off))
 326                                 goto err;
 327                         }
 328                 else /* form == POINT_CONVERSION_HYBRID */
 329                         {
 330                         if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
 331                                 buffer, off))
 332                                 goto err;
 333                         }
 334                 if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
 335                         buffer, off)) goto err;
 336                 if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
 337                         buffer, off)) goto err;
 338                 if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
 339                         goto err;
 340                 }
 341         ret=1;
 342 err:
 343         if (!ret)
 344                 ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
 345         if (p)
 346                 BN_free(p);
 347         if (a)
 348                 BN_free(a);
 349         if (b)
 350                 BN_free(b);
 351         if (gen)
 352                 BN_free(gen);
 353         if (order)
 354                 BN_free(order);
 355         if (cofactor)
 356                 BN_free(cofactor);
 357         if (ctx)
 358                 BN_CTX_free(ctx);
 359         if (buffer != NULL)
 360                 OPENSSL_free(buffer);
 361         return(ret);
 362         }
 363
 364 static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
 365                 size_t len, int off)
 366         {
 367         size_t i;
 368         char str[128];
 369
 370         if (buf == NULL)
 371                 return 1;
 372         if (off)
 373                 {
 374                 if (off > 128)
 375                         off=128;
 376                 memset(str,' ',off);
 377                 if (BIO_write(fp, str, off) <= 0)
 378                         return 0;
 379                 }
 380
 381         if (BIO_printf(fp,"%s", name) <= 0)
 382                 return 0;
 383
 384         for (i=0; i<len; i++)
 385                 {
 386                 if ((i%15) == 0)
 387                         {
 388                         str[0]='\n';
 389                         memset(&(str[1]),' ',off+4);
 390                         if (BIO_write(fp, str, off+1+4) <= 0)
 391                                 return 0;
 392                         }
 393                 if (BIO_printf(fp,"%02x%s",buf[i],((i+1) == len)?"":":") <= 0)
 394                         return 0;
 395                 }
 396         if (BIO_write(fp,"\n",1) <= 0)
 397                 return 0;
 398
 399         return 1;
 400         }