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         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         if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
 183             goto err;
 184         if (BIO_printf(bp, "\n") <= 0)
 185             goto err;
 186         nname = EC_curve_nid2nist(nid);
 187         if (nname) {
 188             if (!BIO_indent(bp, off, 128))
 189                 goto err;
 190             if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
 191                 goto err;
 192         }
 193     } else {
 194         /* explicit parameters */
 195         int is_char_two = 0;
 196         point_conversion_form_t form;
 197         int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));
 198
 199         if (tmp_nid == NID_X9_62_characteristic_two_field)
 200             is_char_two = 1;
 201
 202         if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
 203             (b = BN_new()) == NULL || (order = BN_new()) == NULL ||
 204             (cofactor = BN_new()) == NULL) {
 205             reason = ERR_R_MALLOC_FAILURE;
 206             goto err;
 207         }
 208 #ifndef OPENSSL_NO_EC2M
 209         if (is_char_two) {
 210             if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx)) {
 211                 reason = ERR_R_EC_LIB;
 212                 goto err;
 213             }
 214         } else                  /* prime field */
 215 #endif
 216         {
 217             if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx)) {
 218                 reason = ERR_R_EC_LIB;
 219                 goto err;
 220             }
 221         }
 222
 223         if ((point = EC_GROUP_get0_generator(x)) == NULL) {
 224             reason = ERR_R_EC_LIB;
 225             goto err;
 226         }
 227         if (!EC_GROUP_get_order(x, order, NULL) ||
 228             !EC_GROUP_get_cofactor(x, cofactor, NULL)) {
 229             reason = ERR_R_EC_LIB;
 230             goto err;
 231         }
 232
 233         form = EC_GROUP_get_point_conversion_form(x);
 234
 235         if ((gen = EC_POINT_point2bn(x, point, form, NULL, ctx)) == NULL) {
 236             reason = ERR_R_EC_LIB;
 237             goto err;
 238         }
 239
 240         buf_len = (size_t)BN_num_bytes(p);
 241         if (buf_len < (i = (size_t)BN_num_bytes(a)))
 242             buf_len = i;
 243         if (buf_len < (i = (size_t)BN_num_bytes(b)))
 244             buf_len = i;
 245         if (buf_len < (i = (size_t)BN_num_bytes(gen)))
 246             buf_len = i;
 247         if (buf_len < (i = (size_t)BN_num_bytes(order)))
 248             buf_len = i;
 249         if (buf_len < (i = (size_t)BN_num_bytes(cofactor)))
 250             buf_len = i;
 251
 252         if ((seed = EC_GROUP_get0_seed(x)) != NULL)
 253             seed_len = EC_GROUP_get_seed_len(x);
 254
 255         buf_len += 10;
 256         if ((buffer = OPENSSL_malloc(buf_len)) == NULL) {
 257             reason = ERR_R_MALLOC_FAILURE;
 258             goto err;
 259         }
 260
 261         if (!BIO_indent(bp, off, 128))
 262             goto err;
 263
 264         /* print the 'short name' of the field type */
 265         if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
 266             <= 0)
 267             goto err;
 268
 269         if (is_char_two) {
 270             /* print the 'short name' of the base type OID */
 271             int basis_type = EC_GROUP_get_basis_type(x);
 272             if (basis_type == 0)
 273                 goto err;
 274
 275             if (!BIO_indent(bp, off, 128))
 276                 goto err;
 277
 278             if (BIO_printf(bp, "Basis Type: %s\n",
 279                            OBJ_nid2sn(basis_type)) <= 0)
 280                 goto err;
 281
 282             /* print the polynomial */
 283             if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
 284                                               off))
 285                 goto err;
 286         } else {
 287             if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer, off))
 288                 goto err;
 289         }
 290         if ((a != NULL) && !ASN1_bn_print(bp, "A:   ", a, buffer, off))
 291             goto err;
 292         if ((b != NULL) && !ASN1_bn_print(bp, "B:   ", b, buffer, off))
 293             goto err;
 294         if (form == POINT_CONVERSION_COMPRESSED) {
 295             if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
 296                                                 buffer, off))
 297                 goto err;
 298         } else if (form == POINT_CONVERSION_UNCOMPRESSED) {
 299             if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
 300                                                 buffer, off))
 301                 goto err;
 302         } else {                /* form == POINT_CONVERSION_HYBRID */
 303
 304             if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
 305                                                 buffer, off))
 306                 goto err;
 307         }
 308         if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
 309                                               buffer, off))
 310             goto err;
 311         if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
 312                                                  buffer, off))
 313             goto err;
 314         if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
 315             goto err;
 316     }
 317     ret = 1;
 318  err:
 319     if (!ret)
 320         ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
 321     BN_free(p);
 322     BN_free(a);
 323     BN_free(b);
 324     BN_free(gen);
 325     BN_free(order);
 326     BN_free(cofactor);
 327     BN_CTX_free(ctx);
 328     if (buffer != NULL)
 329         OPENSSL_free(buffer);
 330     return (ret);
 331 }
 332
 333 static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
 334                      size_t len, int off)
 335 {
 336     size_t i;
 337     char str[128];
 338
 339     if (buf == NULL)
 340         return 1;
 341     if (off > 0) {
 342         if (off > 128)
 343             off = 128;
 344         memset(str, ' ', off);
 345         if (BIO_write(fp, str, off) <= 0)
 346             return 0;
 347     } else {
 348         off = 0;
 349     }
 350
 351     if (BIO_printf(fp, "%s", name) <= 0)
 352         return 0;
 353
 354     for (i = 0; i < len; i++) {
 355         if ((i % 15) == 0) {
 356             str[0] = '\n';
 357             memset(&(str[1]), ' ', off + 4);
 358             if (BIO_write(fp, str, off + 1 + 4) <= 0)
 359                 return 0;
 360         }
 361         if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <=
 362             0)
 363             return 0;
 364     }
 365     if (BIO_write(fp, "\n", 1) <= 0)
 366         return 0;
 367
 368     return 1;
 369 }