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 #ifndef OPENSSL_NO_EC
  60 # include <stdio.h>
  61 # include <stdlib.h>
  62 # include <string.h>
  63 # include "apps.h"
  64 # include <openssl/bio.h>
  65 # include <openssl/err.h>
  66 # include <openssl/evp.h>
  67 # include <openssl/pem.h>
  68
  69 static OPT_PAIR conv_forms[] = {
  70     {"compressed", POINT_CONVERSION_COMPRESSED},
  71     {"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
  72     {"hybrid", POINT_CONVERSION_HYBRID},
  73     {NULL}
  74 };
  75
  76 static OPT_PAIR param_enc[] = {
  77     {"named_curve", OPENSSL_EC_NAMED_CURVE},
  78     {"explicit", 0},
  79     {NULL}
  80 };
  81
  82 typedef enum OPTION_choice {
  83     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  84     OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
  85     OPT_NOOUT, OPT_TEXT, OPT_PARAM_OUT, OPT_PUBIN, OPT_PUBOUT,
  86     OPT_PASSIN, OPT_PASSOUT, OPT_PARAM_ENC, OPT_CONV_FORM, OPT_CIPHER
  87 } OPTION_CHOICE;
  88
  89 OPTIONS ec_options[] = {
  90     {"help", OPT_HELP, '-', "Display this summary"},
  91     {"in", OPT_IN, '<', "Input file"},
  92     {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
  93     {"out", OPT_OUT, '>', "Output file"},
  94     {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
  95 # ifndef OPENSSL_NO_ENGINE
  96     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  97 # endif
  98     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  99     {"text", OPT_TEXT, '-', "Print the key"},
 100     {"param_out", OPT_PARAM_OUT, '-', "Print the elliptic curve parameters"},
 101     {"pubin", OPT_PUBIN, '-'},
 102     {"pubout", OPT_PUBOUT, '-'},
 103     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
 104     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
 105     {"param_enc", OPT_PARAM_ENC, 's',
 106      "Specifies the way the ec parameters are encoded"},
 107     {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
 108     {"", OPT_CIPHER, '-', "Any supported cipher"},
 109     {NULL}
 110 };
 111
 112 int ec_main(int argc, char **argv)
 113 {
 114     BIO *in = NULL, *out = NULL;
 115     EC_KEY *eckey = NULL;
 116     const EC_GROUP *group;
 117     const EVP_CIPHER *enc = NULL;
 118     point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
 119     char *infile = NULL, *outfile = NULL, *prog;
 120     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
 121     OPTION_CHOICE o;
 122     int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_form = 0, new_asn1_flag = 0;
 123     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
 124     int pubin = 0, pubout = 0, param_out = 0, i, ret = 1;
 125
 126     prog = opt_init(argc, argv, ec_options);
 127     while ((o = opt_next()) != OPT_EOF) {
 128         switch (o) {
 129         case OPT_EOF:
 130         case OPT_ERR:
 131  opthelp:
 132             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 133             goto end;
 134         case OPT_HELP:
 135             opt_help(ec_options);
 136             ret = 0;
 137             goto end;
 138         case OPT_INFORM:
 139             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
 140                 goto opthelp;
 141             break;
 142         case OPT_IN:
 143             infile = opt_arg();
 144             break;
 145         case OPT_OUTFORM:
 146             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
 147                 goto opthelp;
 148             break;
 149         case OPT_OUT:
 150             outfile = opt_arg();
 151             break;
 152         case OPT_NOOUT:
 153             noout = 1;
 154             break;
 155         case OPT_TEXT:
 156             text = 1;
 157             break;
 158         case OPT_PARAM_OUT:
 159             param_out = 1;
 160             break;
 161         case OPT_PUBIN:
 162             pubin = 1;
 163             break;
 164         case OPT_PUBOUT:
 165             pubout = 1;
 166             break;
 167         case OPT_PASSIN:
 168             passinarg = opt_arg();
 169             break;
 170         case OPT_PASSOUT:
 171             passoutarg = opt_arg();
 172             break;
 173         case OPT_ENGINE:
 174             (void)setup_engine(opt_arg(), 0);
 175             break;
 176         case OPT_CIPHER:
 177             if (!opt_cipher(opt_unknown(), &enc))
 178                 goto opthelp;
 179         case OPT_CONV_FORM:
 180             if (!opt_pair(opt_arg(), conv_forms, &i))
 181                 goto opthelp;
 182             new_form = 1;
 183             form = i;
 184             break;
 185         case OPT_PARAM_ENC:
 186             if (!opt_pair(opt_arg(), param_enc, &i))
 187                 goto opthelp;
 188             new_asn1_flag = 1;
 189             asn1_flag = i;
 190             break;
 191         }
 192     }
 193     argc = opt_num_rest();
 194     argv = opt_rest();
 195
 196     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 197         BIO_printf(bio_err, "Error getting passwords\n");
 198         goto end;
 199     }
 200
 201     in = bio_open_default(infile, RB(informat));
 202     if (in == NULL)
 203         goto end;
 204
 205     BIO_printf(bio_err, "read EC key\n");
 206     if (informat == FORMAT_ASN1) {
 207         if (pubin)
 208             eckey = d2i_EC_PUBKEY_bio(in, NULL);
 209         else
 210             eckey = d2i_ECPrivateKey_bio(in, NULL);
 211     } else {
 212         if (pubin)
 213             eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, NULL);
 214         else
 215             eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL, passin);
 216     }
 217     if (eckey == NULL) {
 218         BIO_printf(bio_err, "unable to load Key\n");
 219         ERR_print_errors(bio_err);
 220         goto end;
 221     }
 222
 223     out = bio_open_default(outfile, WB(outformat));
 224     if (out == NULL)
 225         goto end;
 226
 227     group = EC_KEY_get0_group(eckey);
 228
 229     if (new_form)
 230         EC_KEY_set_conv_form(eckey, form);
 231
 232     if (new_asn1_flag)
 233         EC_KEY_set_asn1_flag(eckey, asn1_flag);
 234
 235     if (text)
 236         if (!EC_KEY_print(out, eckey, 0)) {
 237             perror(outfile);
 238             ERR_print_errors(bio_err);
 239             goto end;
 240         }
 241
 242     if (noout) {
 243         ret = 0;
 244         goto end;
 245     }
 246
 247     BIO_printf(bio_err, "writing EC key\n");
 248     if (outformat == FORMAT_ASN1) {
 249         if (param_out)
 250             i = i2d_ECPKParameters_bio(out, group);
 251         else if (pubin || pubout)
 252             i = i2d_EC_PUBKEY_bio(out, eckey);
 253         else
 254             i = i2d_ECPrivateKey_bio(out, eckey);
 255     } else {
 256         if (param_out)
 257             i = PEM_write_bio_ECPKParameters(out, group);
 258         else if (pubin || pubout)
 259             i = PEM_write_bio_EC_PUBKEY(out, eckey);
 260         else
 261             i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
 262                                            NULL, 0, NULL, passout);
 263     }
 264
 265     if (!i) {
 266         BIO_printf(bio_err, "unable to write private key\n");
 267         ERR_print_errors(bio_err);
 268     } else
 269         ret = 0;
 270  end:
 271     BIO_free(in);
 272     BIO_free_all(out);
 273     EC_KEY_free(eckey);
 274     OPENSSL_free(passin);
 275     OPENSSL_free(passout);
 276     return (ret);
 277 }
 278 #else                           /* !OPENSSL_NO_EC */
 279
 280 # if PEDANTIC
 281 static void *dummy = &dummy;
 282 # endif
 283
 284 #endif