apps/ec.c

   1 /*
   2  * Written by Nils Larsch for the OpenSSL project.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    openssl-core@openssl.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58 #include <openssl/opensslconf.h>
  59 #ifdef OPENSSL_NO_EC
  60 NON_EMPTY_TRANSLATION_UNIT
  61 #else
  62
  63 # include <stdio.h>
  64 # include <stdlib.h>
  65 # include <string.h>
  66 # include "apps.h"
  67 # include <openssl/bio.h>
  68 # include <openssl/err.h>
  69 # include <openssl/evp.h>
  70 # include <openssl/pem.h>
  71
  72 static OPT_PAIR conv_forms[] = {
  73     {"compressed", POINT_CONVERSION_COMPRESSED},
  74     {"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
  75     {"hybrid", POINT_CONVERSION_HYBRID},
  76     {NULL}
  77 };
  78
  79 static OPT_PAIR param_enc[] = {
  80     {"named_curve", OPENSSL_EC_NAMED_CURVE},
  81     {"explicit", 0},
  82     {NULL}
  83 };
  84
  85 typedef enum OPTION_choice {
  86     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  87     OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
  88     OPT_NOOUT, OPT_TEXT, OPT_PARAM_OUT, OPT_PUBIN, OPT_PUBOUT,
  89     OPT_PASSIN, OPT_PASSOUT, OPT_PARAM_ENC, OPT_CONV_FORM, OPT_CIPHER,
  90     OPT_NO_PUBLIC, OPT_CHECK
  91 } OPTION_CHOICE;
  92
  93 OPTIONS ec_options[] = {
  94     {"help", OPT_HELP, '-', "Display this summary"},
  95     {"in", OPT_IN, '<', "Input file"},
  96     {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
  97     {"out", OPT_OUT, '>', "Output file"},
  98     {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
  99     {"noout", OPT_NOOUT, '-', "Don't print key out"},
 100     {"text", OPT_TEXT, '-', "Print the key"},
 101     {"param_out", OPT_PARAM_OUT, '-', "Print the elliptic curve parameters"},
 102     {"pubin", OPT_PUBIN, '-'},
 103     {"pubout", OPT_PUBOUT, '-'},
 104     {"no_public", OPT_NO_PUBLIC, '-', "exclude public key from private key"},
 105     {"check", OPT_CHECK, '-', "check key consistency"},
 106     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
 107     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
 108     {"param_enc", OPT_PARAM_ENC, 's',
 109      "Specifies the way the ec parameters are encoded"},
 110     {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
 111     {"", OPT_CIPHER, '-', "Any supported cipher"},
 112 # ifndef OPENSSL_NO_ENGINE
 113     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 114 # endif
 115     {NULL}
 116 };
 117
 118 int ec_main(int argc, char **argv)
 119 {
 120     BIO *in = NULL, *out = NULL;
 121     EC_KEY *eckey = NULL;
 122     const EC_GROUP *group;
 123     const EVP_CIPHER *enc = NULL;
 124     point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
 125     char *infile = NULL, *outfile = NULL, *prog;
 126     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
 127     OPTION_CHOICE o;
 128     int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_form = 0, new_asn1_flag = 0;
 129     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
 130     int pubin = 0, pubout = 0, param_out = 0, i, ret = 1, private = 0;
 131     int no_public = 0, check = 0;
 132
 133     prog = opt_init(argc, argv, ec_options);
 134     while ((o = opt_next()) != OPT_EOF) {
 135         switch (o) {
 136         case OPT_EOF:
 137         case OPT_ERR:
 138  opthelp:
 139             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 140             goto end;
 141         case OPT_HELP:
 142             opt_help(ec_options);
 143             ret = 0;
 144             goto end;
 145         case OPT_INFORM:
 146             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
 147                 goto opthelp;
 148             break;
 149         case OPT_IN:
 150             infile = opt_arg();
 151             break;
 152         case OPT_OUTFORM:
 153             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
 154                 goto opthelp;
 155             break;
 156         case OPT_OUT:
 157             outfile = opt_arg();
 158             break;
 159         case OPT_NOOUT:
 160             noout = 1;
 161             break;
 162         case OPT_TEXT:
 163             text = 1;
 164             break;
 165         case OPT_PARAM_OUT:
 166             param_out = 1;
 167             break;
 168         case OPT_PUBIN:
 169             pubin = 1;
 170             break;
 171         case OPT_PUBOUT:
 172             pubout = 1;
 173             break;
 174         case OPT_PASSIN:
 175             passinarg = opt_arg();
 176             break;
 177         case OPT_PASSOUT:
 178             passoutarg = opt_arg();
 179             break;
 180         case OPT_ENGINE:
 181             (void)setup_engine(opt_arg(), 0);
 182             break;
 183         case OPT_CIPHER:
 184             if (!opt_cipher(opt_unknown(), &enc))
 185                 goto opthelp;
 186             break;
 187         case OPT_CONV_FORM:
 188             if (!opt_pair(opt_arg(), conv_forms, &i))
 189                 goto opthelp;
 190             new_form = 1;
 191             form = i;
 192             break;
 193         case OPT_PARAM_ENC:
 194             if (!opt_pair(opt_arg(), param_enc, &i))
 195                 goto opthelp;
 196             new_asn1_flag = 1;
 197             asn1_flag = i;
 198             break;
 199         case OPT_NO_PUBLIC:
 200             no_public = 1;
 201             break;
 202         case OPT_CHECK:
 203             check = 1;
 204             break;
 205         }
 206     }
 207     argc = opt_num_rest();
 208     argv = opt_rest();
 209     private = param_out || pubin || pubout ? 0 : 1;
 210     if (text && !pubin)
 211         private = 1;
 212
 213     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 214         BIO_printf(bio_err, "Error getting passwords\n");
 215         goto end;
 216     }
 217
 218     in = bio_open_default(infile, 'r', informat);
 219     if (in == NULL)
 220         goto end;
 221
 222     BIO_printf(bio_err, "read EC key\n");
 223     if (informat == FORMAT_ASN1) {
 224         if (pubin)
 225             eckey = d2i_EC_PUBKEY_bio(in, NULL);
 226         else
 227             eckey = d2i_ECPrivateKey_bio(in, NULL);
 228     } else {
 229         if (pubin)
 230             eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, NULL);
 231         else
 232             eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL, passin);
 233     }
 234     if (eckey == NULL) {
 235         BIO_printf(bio_err, "unable to load Key\n");
 236         ERR_print_errors(bio_err);
 237         goto end;
 238     }
 239
 240     out = bio_open_owner(outfile, outformat, private);
 241     if (out == NULL)
 242         goto end;
 243
 244     group = EC_KEY_get0_group(eckey);
 245
 246     if (new_form)
 247         EC_KEY_set_conv_form(eckey, form);
 248
 249     if (new_asn1_flag)
 250         EC_KEY_set_asn1_flag(eckey, asn1_flag);
 251
 252     if (no_public)
 253         EC_KEY_set_enc_flags(eckey, EC_PKEY_NO_PUBKEY);
 254
 255     if (text) {
 256         assert(pubin || private);
 257         if (!EC_KEY_print(out, eckey, 0)) {
 258             perror(outfile);
 259             ERR_print_errors(bio_err);
 260             goto end;
 261         }
 262     }
 263
 264     if (check) {
 265         if (EC_KEY_check_key(eckey) == 1) {
 266             BIO_printf(bio_err, "EC Key valid.\n");
 267         } else {
 268             BIO_printf(bio_err, "EC Key Invalid!\n");
 269             ERR_print_errors(bio_err);
 270         }
 271     }
 272
 273     if (noout) {
 274         ret = 0;
 275         goto end;
 276     }
 277
 278     BIO_printf(bio_err, "writing EC key\n");
 279     if (outformat == FORMAT_ASN1) {
 280         if (param_out)
 281             i = i2d_ECPKParameters_bio(out, group);
 282         else if (pubin || pubout)
 283             i = i2d_EC_PUBKEY_bio(out, eckey);
 284         else {
 285             assert(private);
 286             i = i2d_ECPrivateKey_bio(out, eckey);
 287         }
 288     } else {
 289         if (param_out)
 290             i = PEM_write_bio_ECPKParameters(out, group);
 291         else if (pubin || pubout)
 292             i = PEM_write_bio_EC_PUBKEY(out, eckey);
 293         else {
 294             assert(private);
 295             i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
 296                                            NULL, 0, NULL, passout);
 297         }
 298     }
 299
 300     if (!i) {
 301         BIO_printf(bio_err, "unable to write private key\n");
 302         ERR_print_errors(bio_err);
 303     } else
 304         ret = 0;
 305  end:
 306     BIO_free(in);
 307     BIO_free_all(out);
 308     EC_KEY_free(eckey);
 309     OPENSSL_free(passin);
 310     OPENSSL_free(passout);
 311     return (ret);
 312 }
 313 #endif