lib/libcrypto/ec/eck_prn.c

   1 /* $OpenBSD: eck_prn.c,v 1.12 2017/01/29 17:49:23 beck Exp $ */
   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 <string.h>
  66
  67 #include <openssl/opensslconf.h>
  68
  69 #include <openssl/bn.h>
  70 #include <openssl/ec.h>
  71 #include <openssl/err.h>
  72 #include <openssl/evp.h>
  73
  74 int
  75 ECPKParameters_print_fp(FILE * fp, const EC_GROUP * x, int off)
  76 {
  77         BIO *b;
  78         int ret;
  79
  80         if ((b = BIO_new(BIO_s_file())) == NULL) {
  81                 ECerror(ERR_R_BUF_LIB);
  82                 return (0);
  83         }
  84         BIO_set_fp(b, fp, BIO_NOCLOSE);
  85         ret = ECPKParameters_print(b, x, off);
  86         BIO_free(b);
  87         return (ret);
  88 }
  89
  90 int
  91 EC_KEY_print_fp(FILE * fp, const EC_KEY * x, int off)
  92 {
  93         BIO *b;
  94         int ret;
  95
  96         if ((b = BIO_new(BIO_s_file())) == NULL) {
  97                 ECerror(ERR_R_BIO_LIB);
  98                 return (0);
  99         }
 100         BIO_set_fp(b, fp, BIO_NOCLOSE);
 101         ret = EC_KEY_print(b, x, off);
 102         BIO_free(b);
 103         return (ret);
 104 }
 105
 106 int
 107 ECParameters_print_fp(FILE * fp, const EC_KEY * x)
 108 {
 109         BIO *b;
 110         int ret;
 111
 112         if ((b = BIO_new(BIO_s_file())) == NULL) {
 113                 ECerror(ERR_R_BIO_LIB);
 114                 return (0);
 115         }
 116         BIO_set_fp(b, fp, BIO_NOCLOSE);
 117         ret = ECParameters_print(b, x);
 118         BIO_free(b);
 119         return (ret);
 120 }
 121
 122 int
 123 EC_KEY_print(BIO * bp, const EC_KEY * x, int off)
 124 {
 125         EVP_PKEY *pk;
 126         int ret;
 127         pk = EVP_PKEY_new();
 128         if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *) x))
 129                 return 0;
 130         ret = EVP_PKEY_print_private(bp, pk, off, NULL);
 131         EVP_PKEY_free(pk);
 132         return ret;
 133 }
 134
 135 int
 136 ECParameters_print(BIO * bp, const EC_KEY * x)
 137 {
 138         EVP_PKEY *pk;
 139         int ret;
 140         pk = EVP_PKEY_new();
 141         if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *) x))
 142                 return 0;
 143         ret = EVP_PKEY_print_params(bp, pk, 4, NULL);
 144         EVP_PKEY_free(pk);
 145         return ret;
 146 }
 147
 148 static int
 149 print_bin(BIO * fp, const char *str, const unsigned char *num,
 150     size_t len, int off);
 151
 152 int
 153 ECPKParameters_print(BIO * bp, const EC_GROUP * x, int off)
 154 {
 155         unsigned char *buffer = NULL;
 156         size_t buf_len = 0, i;
 157         int ret = 0, reason = ERR_R_BIO_LIB;
 158         BN_CTX *ctx = NULL;
 159         const EC_POINT *point = NULL;
 160         BIGNUM *p = NULL, *a = NULL, *b = NULL, *gen = NULL, *order = NULL,
 161         *cofactor = NULL;
 162         const unsigned char *seed;
 163         size_t seed_len = 0;
 164         const char *nname;
 165
 166         static const char *gen_compressed = "Generator (compressed):";
 167         static const char *gen_uncompressed = "Generator (uncompressed):";
 168         static const char *gen_hybrid = "Generator (hybrid):";
 169
 170         if (!x) {
 171                 reason = ERR_R_PASSED_NULL_PARAMETER;
 172                 goto err;
 173         }
 174         ctx = BN_CTX_new();
 175         if (ctx == NULL) {
 176                 reason = ERR_R_MALLOC_FAILURE;
 177                 goto err;
 178         }
 179         if (EC_GROUP_get_asn1_flag(x)) {
 180                 /* the curve parameter are given by an asn1 OID */
 181                 int nid;
 182
 183                 if (!BIO_indent(bp, off, 128))
 184                         goto err;
 185
 186                 nid = EC_GROUP_get_curve_name(x);
 187                 if (nid == 0)
 188                         goto err;
 189
 190                 if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
 191                         goto err;
 192                 if (BIO_printf(bp, "\n") <= 0)
 193                         goto err;
 194
 195                 nname = EC_curve_nid2nist(nid);
 196                 if (nname) {
 197                         if (!BIO_indent(bp, off, 128))
 198                                 goto err;
 199                         if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
 200                                 goto err;
 201                 }
 202         } else {
 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                         reason = ERR_R_MALLOC_FAILURE;
 215                         goto err;
 216                 }
 217 #ifndef OPENSSL_NO_EC2M
 218                 if (is_char_two) {
 219                         if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx)) {
 220                                 reason = ERR_R_EC_LIB;
 221                                 goto err;
 222                         }
 223                 } else          /* prime field */
 224 #endif
 225                 {
 226                         if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx)) {
 227                                 reason = ERR_R_EC_LIB;
 228                                 goto err;
 229                         }
 230                 }
 231
 232                 if ((point = EC_GROUP_get0_generator(x)) == NULL) {
 233                         reason = ERR_R_EC_LIB;
 234                         goto err;
 235                 }
 236                 if (!EC_GROUP_get_order(x, order, NULL) ||
 237                     !EC_GROUP_get_cofactor(x, cofactor, NULL)) {
 238                         reason = ERR_R_EC_LIB;
 239                         goto err;
 240                 }
 241                 form = EC_GROUP_get_point_conversion_form(x);
 242
 243                 if ((gen = EC_POINT_point2bn(x, point,
 244                             form, NULL, ctx)) == NULL) {
 245                         reason = ERR_R_EC_LIB;
 246                         goto err;
 247                 }
 248                 buf_len = (size_t) BN_num_bytes(p);
 249                 if (buf_len < (i = (size_t) BN_num_bytes(a)))
 250                         buf_len = i;
 251                 if (buf_len < (i = (size_t) BN_num_bytes(b)))
 252                         buf_len = i;
 253                 if (buf_len < (i = (size_t) BN_num_bytes(gen)))
 254                         buf_len = i;
 255                 if (buf_len < (i = (size_t) BN_num_bytes(order)))
 256                         buf_len = i;
 257                 if (buf_len < (i = (size_t) BN_num_bytes(cofactor)))
 258                         buf_len = i;
 259
 260                 if ((seed = EC_GROUP_get0_seed(x)) != NULL)
 261                         seed_len = EC_GROUP_get_seed_len(x);
 262
 263                 buf_len += 10;
 264                 if ((buffer = malloc(buf_len)) == NULL) {
 265                         reason = ERR_R_MALLOC_FAILURE;
 266                         goto err;
 267                 }
 268                 if (!BIO_indent(bp, off, 128))
 269                         goto err;
 270
 271                 /* print the 'short name' of the field type */
 272                 if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
 273                     <= 0)
 274                         goto err;
 275
 276                 if (is_char_two) {
 277                         /* print the 'short name' of the base type OID */
 278                         int basis_type = EC_GROUP_get_basis_type(x);
 279                         if (basis_type == 0)
 280                                 goto err;
 281
 282                         if (!BIO_indent(bp, off, 128))
 283                                 goto err;
 284
 285                         if (BIO_printf(bp, "Basis Type: %s\n",
 286                                 OBJ_nid2sn(basis_type)) <= 0)
 287                                 goto err;
 288
 289                         /* print the polynomial */
 290                         if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
 291                                 off))
 292                                 goto err;
 293                 } else {
 294                         if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer, off))
 295                                 goto err;
 296                 }
 297                 if ((a != NULL) && !ASN1_bn_print(bp, "A:   ", a, buffer, off))
 298                         goto err;
 299                 if ((b != NULL) && !ASN1_bn_print(bp, "B:   ", b, buffer, off))
 300                         goto err;
 301                 if (form == POINT_CONVERSION_COMPRESSED) {
 302                         if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
 303                                 buffer, off))
 304                                 goto err;
 305                 } else if (form == POINT_CONVERSION_UNCOMPRESSED) {
 306                         if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
 307                                 buffer, off))
 308                                 goto err;
 309                 } else {        /* form == POINT_CONVERSION_HYBRID */
 310                         if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
 311                                 buffer, off))
 312                                 goto err;
 313                 }
 314                 if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
 315                         buffer, off))
 316                         goto err;
 317                 if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
 318                         buffer, off))
 319                         goto err;
 320                 if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
 321                         goto err;
 322         }
 323         ret = 1;
 324 err:
 325         if (!ret)
 326                 ECerror(reason);
 327         BN_free(p);
 328         BN_free(a);
 329         BN_free(b);
 330         BN_free(gen);
 331         BN_free(order);
 332         BN_free(cofactor);
 333         BN_CTX_free(ctx);
 334         free(buffer);
 335         return (ret);
 336 }
 337
 338 static int
 339 print_bin(BIO * fp, const char *name, const unsigned char *buf,
 340     size_t len, int off)
 341 {
 342         size_t i;
 343         char str[128];
 344
 345         if (buf == NULL)
 346                 return 1;
 347         if (off) {
 348                 if (off > 128)
 349                         off = 128;
 350                 memset(str, ' ', off);
 351                 if (BIO_write(fp, str, off) <= 0)
 352                         return 0;
 353         }
 354         if (BIO_printf(fp, "%s", name) <= 0)
 355                 return 0;
 356
 357         for (i = 0; i < len; i++) {
 358                 if ((i % 15) == 0) {
 359                         str[0] = '\n';
 360                         memset(&(str[1]), ' ', off + 4);
 361                         if (BIO_write(fp, str, off + 1 + 4) <= 0)
 362                                 return 0;
 363                 }
 364                 if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <= 0)
 365                         return 0;
 366         }
 367         if (BIO_write(fp, "\n", 1) <= 0)
 368                 return 0;
 369
 370         return 1;
 371 }