apps/genpkey.c

   1 /* apps/genpkey.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2006
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2006 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  *    licensing@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 #include <stdio.h>
  59 #include <string.h>
  60 #include "apps.h"
  61 #include <openssl/pem.h>
  62 #include <openssl/err.h>
  63 #include <openssl/evp.h>
  64
  65 static int init_keygen_file(BIO *err, EVP_PKEY_CTX **pctx,
  66                                 const char *file, ENGINE *e);
  67 static int init_gen_str(BIO *err, EVP_PKEY_CTX **pctx,
  68                                 const char *algname, ENGINE *e, int do_param);
  69 static int genpkey_cb(EVP_PKEY_CTX *ctx);
  70
  71 #define PROG genpkey_main
  72
  73 int MAIN(int, char **);
  74
  75 int MAIN(int argc, char **argv)
  76         {
  77         ENGINE *e = NULL;
  78         char **args, *outfile = NULL;
  79         char *passarg = NULL;
  80         BIO *in = NULL, *out = NULL;
  81         const EVP_CIPHER *cipher = NULL;
  82         int outformat;
  83         int text = 0;
  84         EVP_PKEY *pkey=NULL;
  85         EVP_PKEY_CTX *ctx = NULL;
  86         char *pass = NULL;
  87         int badarg = 0;
  88         int ret = 1;
  89
  90         int do_param = -1;
  91
  92         if (bio_err == NULL)
  93                 bio_err = BIO_new_fp (stderr, BIO_NOCLOSE);
  94
  95         if (!load_config(bio_err, NULL))
  96                 goto end;
  97
  98         outformat=FORMAT_PEM;
  99
 100         ERR_load_crypto_strings();
 101         OpenSSL_add_all_algorithms();
 102         args = argv + 1;
 103         while (!badarg && *args && *args[0] == '-')
 104                 {
 105                 if (!strcmp(*args,"-outform"))
 106                         {
 107                         if (args[1])
 108                                 {
 109                                 args++;
 110                                 outformat=str2fmt(*args);
 111                                 }
 112                         else badarg = 1;
 113                         }
 114                 else if (!strcmp(*args,"-pass"))
 115                         {
 116                         if (!args[1]) goto bad;
 117                         passarg= *(++args);
 118                         }
 119 #ifndef OPENSSL_NO_ENGINE
 120                 else if (strcmp(*args,"-engine") == 0)
 121                         {
 122                         if (!args[1])
 123                                 goto bad;
 124                         e = setup_engine(bio_err, *(++args), 0);
 125                         }
 126 #endif
 127                 else if (!strcmp (*args, "-paramfile"))
 128                         {
 129                         if (!args[1])
 130                                 goto bad;
 131                         args++;
 132                         if (do_param == 1)
 133                                 goto bad;
 134                         if (!init_keygen_file(bio_err, &ctx, *args, e))
 135                                 goto end;
 136                         }
 137                 else if (!strcmp (*args, "-out"))
 138                         {
 139                         if (args[1])
 140                                 {
 141                                 args++;
 142                                 outfile = *args;
 143                                 }
 144                         else badarg = 1;
 145                         }
 146                 else if (strcmp(*args,"-algorithm") == 0)
 147                         {
 148                         if (!args[1])
 149                                 goto bad;
 150                         if (do_param == -1)
 151                                 do_param = 0;
 152                         if (!init_gen_str(bio_err, &ctx, *(++args),e, do_param))
 153                                 goto end;
 154                         }
 155                 else if (strcmp(*args,"-param") == 0)
 156                         {
 157                         if (!args[1])
 158                                 goto bad;
 159                         if (!ctx)
 160                                 {
 161                                 BIO_puts(bio_err, "No keytype specified\n");
 162                                 goto bad;
 163                                 }
 164                         else if (pkey_ctrl_string(ctx, *(++args)) <= 0)
 165                                 {
 166                                 BIO_puts(bio_err, "parameter setting error\n");
 167                                 ERR_print_errors(bio_err);
 168                                 goto end;
 169                                 }
 170                         }
 171                 else if (strcmp(*args,"-genparam") == 0)
 172                         {
 173                         if (ctx)
 174                                 goto bad;
 175                         do_param = 1;
 176                         }
 177                 else if (strcmp(*args,"-text") == 0)
 178                         text=1;
 179                 else
 180                         {
 181                         cipher = EVP_get_cipherbyname(*args + 1);
 182                         if (!cipher)
 183                                 {
 184                                 BIO_printf(bio_err, "Unknown cipher %s\n",
 185                                                                 *args + 1);
 186                                 badarg = 1;
 187                                 }
 188                         if (do_param == 1)
 189                                 badarg = 1;
 190                         }
 191                 args++;
 192                 }
 193
 194         if (!ctx)
 195                 badarg = 1;
 196
 197         if (badarg)
 198                 {
 199                 bad:
 200                 BIO_printf(bio_err, "Usage genpkey [options]\n");
 201                 BIO_printf(bio_err, "where options are\n");
 202                 BIO_printf(bio_err, "-paramfile file parameter file\n");
 203                 BIO_printf(bio_err, "-pass arg       output file pass phrase source\n");
 204                 BIO_printf(bio_err, "-outform X      output format (DER or PEM)\n");
 205                 BIO_printf(bio_err, "-out file       output file\n");
 206 #ifndef OPENSSL_NO_ENGINE
 207                 BIO_printf(bio_err, "-engine e       use engine e, possibly a hardware device.\n");
 208 #endif
 209                 return 1;
 210                 }
 211
 212         if (!app_passwd(bio_err, passarg, NULL, &pass, NULL))
 213                 {
 214                 BIO_puts(bio_err, "Error getting password\n");
 215                 goto end;
 216                 }
 217
 218         if (outfile)
 219                 {
 220                 if (!(out = BIO_new_file (outfile, "wb")))
 221                         {
 222                         BIO_printf(bio_err,
 223                                  "Can't open output file %s\n", outfile);
 224                         goto end;
 225                         }
 226                 }
 227         else
 228                 {
 229                 out = BIO_new_fp (stdout, BIO_NOCLOSE);
 230 #ifdef OPENSSL_SYS_VMS
 231                         {
 232                         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 233                         out = BIO_push(tmpbio, out);
 234                         }
 235 #endif
 236                 }
 237
 238         EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
 239         EVP_PKEY_CTX_set_app_data(ctx, bio_err);
 240
 241         if (do_param)
 242                 {
 243                 if (EVP_PKEY_paramgen(ctx, &pkey) <= 0)
 244                         {
 245                         BIO_puts(bio_err, "Error generating parameters\n");
 246                         ERR_print_errors(bio_err);
 247                         goto end;
 248                         }
 249                 }
 250         else
 251                 {
 252                 if (EVP_PKEY_keygen(ctx, &pkey) <= 0)
 253                         {
 254                         BIO_puts(bio_err, "Error generating key\n");
 255                         ERR_print_errors(bio_err);
 256                         goto end;
 257                         }
 258                 }
 259
 260         if (do_param)
 261                 PEM_write_bio_Parameters(out, pkey);
 262         else if (outformat == FORMAT_PEM)
 263                 PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0,
 264                                                                 NULL, pass);
 265         else if (outformat == FORMAT_ASN1)
 266                 i2d_PrivateKey_bio(out, pkey);
 267         else
 268                 {
 269                 BIO_printf(bio_err, "Bad format specified for key\n");
 270                 goto end;
 271                 }
 272
 273
 274         if (text)
 275                 {
 276                 if (do_param)
 277                         EVP_PKEY_print_params(out, pkey, 0, NULL);
 278                 else
 279                         EVP_PKEY_print_private(out, pkey, 0, NULL);
 280                 }
 281
 282         ret = 0;
 283
 284         end:
 285         if (pkey)
 286                 EVP_PKEY_free(pkey);
 287         if (ctx)
 288                 EVP_PKEY_CTX_free(ctx);
 289         if (out)
 290                 BIO_free_all(out);
 291         BIO_free(in);
 292         if (pass)
 293                 OPENSSL_free(pass);
 294
 295         return ret;
 296         }
 297
 298 static int init_keygen_file(BIO *err, EVP_PKEY_CTX **pctx,
 299                                 const char *file, ENGINE *e)
 300         {
 301         BIO *pbio;
 302         EVP_PKEY *pkey = NULL;
 303         EVP_PKEY_CTX *ctx = NULL;
 304         if (*pctx)
 305                 {
 306                 BIO_puts(err, "Parameters already set!\n");
 307                 return 0;
 308                 }
 309
 310         pbio = BIO_new_file(file, "r");
 311         if (!pbio)
 312                 {
 313                 BIO_printf(err, "Can't open parameter file %s\n", file);
 314                 return 0;
 315                 }
 316
 317         pkey = PEM_read_bio_Parameters(pbio, NULL);
 318         BIO_free(pbio);
 319
 320         if (!pkey)
 321                 {
 322                 BIO_printf(bio_err, "Error reading parameter file %s\n", file);
 323                 return 0;
 324                 }
 325
 326         ctx = EVP_PKEY_CTX_new(pkey, e);
 327         if (!ctx)
 328                 goto err;
 329         if (EVP_PKEY_keygen_init(ctx) <= 0)
 330                 goto err;
 331         EVP_PKEY_free(pkey);
 332         *pctx = ctx;
 333         return 1;
 334
 335         err:
 336         BIO_puts(err, "Error initializing context\n");
 337         ERR_print_errors(err);
 338         if (ctx)
 339                 EVP_PKEY_CTX_free(ctx);
 340         if (pkey)
 341                 EVP_PKEY_free(pkey);
 342         return 0;
 343
 344         }
 345
 346 static int init_gen_str(BIO *err, EVP_PKEY_CTX **pctx,
 347                                 const char *algname, ENGINE *e, int do_param)
 348         {
 349         EVP_PKEY_CTX *ctx = NULL;
 350         const EVP_PKEY_ASN1_METHOD *ameth;
 351         int pkey_id;
 352         if (*pctx)
 353                 {
 354                 BIO_puts(err, "Algorithm already set!\n");
 355                 return 0;
 356                 }
 357
 358         ameth = EVP_PKEY_asn1_find_str(algname, -1);
 359         if (!ameth)
 360                 {
 361                 BIO_printf(bio_err, "Algorithm %s not found\n", algname);
 362                 return 0;
 363                 }
 364
 365         EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
 366         ctx = EVP_PKEY_CTX_new_id(pkey_id, e);
 367
 368         if (!ctx)
 369                 goto err;
 370         if (do_param)
 371                 {
 372                 if (EVP_PKEY_paramgen_init(ctx) <= 0)
 373                         goto err;
 374                 }
 375         else
 376                 {
 377                 if (EVP_PKEY_keygen_init(ctx) <= 0)
 378                         goto err;
 379                 }
 380
 381         *pctx = ctx;
 382         return 1;
 383
 384         err:
 385         BIO_printf(err, "Error initializing %s context\n", algname);
 386         ERR_print_errors(err);
 387         if (ctx)
 388                 EVP_PKEY_CTX_free(ctx);
 389         return 0;
 390
 391         }
 392
 393 static int genpkey_cb(EVP_PKEY_CTX *ctx)
 394         {
 395         char c='*';
 396         BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
 397         int p;
 398         p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
 399         if (p == 0) c='.';
 400         if (p == 1) c='+';
 401         if (p == 2) c='*';
 402         if (p == 3) c='\n';
 403         BIO_write(b,&c,1);
 404         (void)BIO_flush(b);
 405 #ifdef LINT
 406         p=n;
 407 #endif
 408         return 1;
 409         }