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