crypto/ec/eck_prn.c

   1 /*
   2  * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /* ====================================================================
  11  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
  12  * Portions originally developed by SUN MICROSYSTEMS, INC., and
  13  * contributed to the OpenSSL project.
  14  */
  15
  16 #include <stdio.h>
  17 #include "internal/cryptlib.h"
  18 #include <openssl/evp.h>
  19 #include <openssl/ec.h>
  20 #include <openssl/bn.h>
  21
  22 #ifndef OPENSSL_NO_STDIO
  23 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off)
  24 {
  25     BIO *b;
  26     int ret;
  27
  28     if ((b = BIO_new(BIO_s_file())) == NULL) {
  29         ECerr(EC_F_ECPKPARAMETERS_PRINT_FP, ERR_R_BUF_LIB);
  30         return (0);
  31     }
  32     BIO_set_fp(b, fp, BIO_NOCLOSE);
  33     ret = ECPKParameters_print(b, x, off);
  34     BIO_free(b);
  35     return (ret);
  36 }
  37
  38 int EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off)
  39 {
  40     BIO *b;
  41     int ret;
  42
  43     if ((b = BIO_new(BIO_s_file())) == NULL) {
  44         ECerr(EC_F_EC_KEY_PRINT_FP, ERR_R_BIO_LIB);
  45         return (0);
  46     }
  47     BIO_set_fp(b, fp, BIO_NOCLOSE);
  48     ret = EC_KEY_print(b, x, off);
  49     BIO_free(b);
  50     return (ret);
  51 }
  52
  53 int ECParameters_print_fp(FILE *fp, const EC_KEY *x)
  54 {
  55     BIO *b;
  56     int ret;
  57
  58     if ((b = BIO_new(BIO_s_file())) == NULL) {
  59         ECerr(EC_F_ECPARAMETERS_PRINT_FP, ERR_R_BIO_LIB);
  60         return (0);
  61     }
  62     BIO_set_fp(b, fp, BIO_NOCLOSE);
  63     ret = ECParameters_print(b, x);
  64     BIO_free(b);
  65     return (ret);
  66 }
  67 #endif
  68
  69 int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
  70 {
  71     EVP_PKEY *pk;
  72     int ret;
  73     pk = EVP_PKEY_new();
  74     if (pk == NULL || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
  75         return 0;
  76     ret = EVP_PKEY_print_private(bp, pk, off, NULL);
  77     EVP_PKEY_free(pk);
  78     return ret;
  79 }
  80
  81 int ECParameters_print(BIO *bp, const EC_KEY *x)
  82 {
  83     EVP_PKEY *pk;
  84     int ret;
  85     pk = EVP_PKEY_new();
  86     if (pk == NULL || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
  87         return 0;
  88     ret = EVP_PKEY_print_params(bp, pk, 4, NULL);
  89     EVP_PKEY_free(pk);
  90     return ret;
  91 }
  92
  93 static int print_bin(BIO *fp, const char *str, const unsigned char *num,
  94                      size_t len, int off);
  95
  96 int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
  97 {
  98     int ret = 0, reason = ERR_R_BIO_LIB;
  99     BN_CTX *ctx = NULL;
 100     const EC_POINT *point = NULL;
 101     BIGNUM *p = NULL, *a = NULL, *b = NULL, *gen = NULL;
 102     const BIGNUM *order = NULL, *cofactor = NULL;
 103     const unsigned char *seed;
 104     size_t seed_len = 0;
 105
 106     static const char *gen_compressed = "Generator (compressed):";
 107     static const char *gen_uncompressed = "Generator (uncompressed):";
 108     static const char *gen_hybrid = "Generator (hybrid):";
 109
 110     if (!x) {
 111         reason = ERR_R_PASSED_NULL_PARAMETER;
 112         goto err;
 113     }
 114
 115     ctx = BN_CTX_new();
 116     if (ctx == NULL) {
 117         reason = ERR_R_MALLOC_FAILURE;
 118         goto err;
 119     }
 120
 121     if (EC_GROUP_get_asn1_flag(x)) {
 122         /* the curve parameter are given by an asn1 OID */
 123         int nid;
 124         const char *nname;
 125
 126         if (!BIO_indent(bp, off, 128))
 127             goto err;
 128
 129         nid = EC_GROUP_get_curve_name(x);
 130         if (nid == 0)
 131             goto err;
 132         if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
 133             goto err;
 134         if (BIO_printf(bp, "\n") <= 0)
 135             goto err;
 136         nname = EC_curve_nid2nist(nid);
 137         if (nname) {
 138             if (!BIO_indent(bp, off, 128))
 139                 goto err;
 140             if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
 141                 goto err;
 142         }
 143     } else {
 144         /* explicit parameters */
 145         int is_char_two = 0;
 146         point_conversion_form_t form;
 147         int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));
 148
 149         if (tmp_nid == NID_X9_62_characteristic_two_field)
 150             is_char_two = 1;
 151
 152         if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
 153             (b = BN_new()) == NULL) {
 154             reason = ERR_R_MALLOC_FAILURE;
 155             goto err;
 156         }
 157 #ifndef OPENSSL_NO_EC2M
 158         if (is_char_two) {
 159             if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx)) {
 160                 reason = ERR_R_EC_LIB;
 161                 goto err;
 162             }
 163         } else                  /* prime field */
 164 #endif
 165         {
 166             if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx)) {
 167                 reason = ERR_R_EC_LIB;
 168                 goto err;
 169             }
 170         }
 171
 172         if ((point = EC_GROUP_get0_generator(x)) == NULL) {
 173             reason = ERR_R_EC_LIB;
 174             goto err;
 175         }
 176         order = EC_GROUP_get0_order(x);
 177         cofactor = EC_GROUP_get0_cofactor(x);
 178         if (order == NULL) {
 179             reason = ERR_R_EC_LIB;
 180             goto err;
 181         }
 182
 183         form = EC_GROUP_get_point_conversion_form(x);
 184
 185         if ((gen = EC_POINT_point2bn(x, point, form, NULL, ctx)) == NULL) {
 186             reason = ERR_R_EC_LIB;
 187             goto err;
 188         }
 189
 190         if ((seed = EC_GROUP_get0_seed(x)) != NULL)
 191             seed_len = EC_GROUP_get_seed_len(x);
 192
 193         if (!BIO_indent(bp, off, 128))
 194             goto err;
 195
 196         /* print the 'short name' of the field type */
 197         if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
 198             <= 0)
 199             goto err;
 200
 201         if (is_char_two) {
 202             /* print the 'short name' of the base type OID */
 203             int basis_type = EC_GROUP_get_basis_type(x);
 204             if (basis_type == 0)
 205                 goto err;
 206
 207             if (!BIO_indent(bp, off, 128))
 208                 goto err;
 209
 210             if (BIO_printf(bp, "Basis Type: %s\n",
 211                            OBJ_nid2sn(basis_type)) <= 0)
 212                 goto err;
 213
 214             /* print the polynomial */
 215             if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, NULL,
 216                                               off))
 217                 goto err;
 218         } else {
 219             if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, NULL, off))
 220                 goto err;
 221         }
 222         if ((a != NULL) && !ASN1_bn_print(bp, "A:   ", a, NULL, off))
 223             goto err;
 224         if ((b != NULL) && !ASN1_bn_print(bp, "B:   ", b, NULL, off))
 225             goto err;
 226         if (form == POINT_CONVERSION_COMPRESSED) {
 227             if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
 228                                                 NULL, off))
 229                 goto err;
 230         } else if (form == POINT_CONVERSION_UNCOMPRESSED) {
 231             if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
 232                                                 NULL, off))
 233                 goto err;
 234         } else {                /* form == POINT_CONVERSION_HYBRID */
 235
 236             if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
 237                                                 NULL, off))
 238                 goto err;
 239         }
 240         if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
 241                                               NULL, off))
 242             goto err;
 243         if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
 244                                                  NULL, off))
 245             goto err;
 246         if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
 247             goto err;
 248     }
 249     ret = 1;
 250  err:
 251     if (!ret)
 252         ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
 253     BN_free(p);
 254     BN_free(a);
 255     BN_free(b);
 256     BN_free(gen);
 257     BN_CTX_free(ctx);
 258     return (ret);
 259 }
 260
 261 static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
 262                      size_t len, int off)
 263 {
 264     size_t i;
 265     char str[128];
 266
 267     if (buf == NULL)
 268         return 1;
 269     if (off > 0) {
 270         if (off > 128)
 271             off = 128;
 272         memset(str, ' ', off);
 273         if (BIO_write(fp, str, off) <= 0)
 274             return 0;
 275     } else {
 276         off = 0;
 277     }
 278
 279     if (BIO_printf(fp, "%s", name) <= 0)
 280         return 0;
 281
 282     for (i = 0; i < len; i++) {
 283         if ((i % 15) == 0) {
 284             str[0] = '\n';
 285             memset(&(str[1]), ' ', off + 4);
 286             if (BIO_write(fp, str, off + 1 + 4) <= 0)
 287                 return 0;
 288         }
 289         if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <=
 290             0)
 291             return 0;
 292     }
 293     if (BIO_write(fp, "\n", 1) <= 0)
 294         return 0;
 295
 296     return 1;
 297 }