apps/genpkey.c

   1 /*
   2  * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 #include <stdio.h>
  11 #include <string.h>
  12 #include "apps.h"
  13 #include "progs.h"
  14 #include <openssl/pem.h>
  15 #include <openssl/err.h>
  16 #include <openssl/evp.h>
  17
  18 static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e,
  19                             OSSL_LIB_CTX *libctx, const char *propq);
  20 static int genpkey_cb(EVP_PKEY_CTX *ctx);
  21
  22 typedef enum OPTION_choice {
  23     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  24     OPT_ENGINE, OPT_OUTFORM, OPT_OUT, OPT_PASS, OPT_PARAMFILE,
  25     OPT_ALGORITHM, OPT_PKEYOPT, OPT_GENPARAM, OPT_TEXT, OPT_CIPHER,
  26     OPT_CONFIG,
  27     OPT_PROV_ENUM
  28 } OPTION_CHOICE;
  29
  30 const OPTIONS genpkey_options[] = {
  31     OPT_SECTION("General"),
  32     {"help", OPT_HELP, '-', "Display this summary"},
  33 #ifndef OPENSSL_NO_ENGINE
  34     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  35 #endif
  36     {"paramfile", OPT_PARAMFILE, '<', "Parameters file"},
  37     {"algorithm", OPT_ALGORITHM, 's', "The public key algorithm"},
  38     {"pkeyopt", OPT_PKEYOPT, 's',
  39      "Set the public key algorithm option as opt:value"},
  40      OPT_CONFIG_OPTION,
  41
  42     OPT_SECTION("Output"),
  43     {"out", OPT_OUT, '>', "Output file"},
  44     {"outform", OPT_OUTFORM, 'F', "output format (DER or PEM)"},
  45     {"pass", OPT_PASS, 's', "Output file pass phrase source"},
  46     {"genparam", OPT_GENPARAM, '-', "Generate parameters, not key"},
  47     {"text", OPT_TEXT, '-', "Print the in text"},
  48     {"", OPT_CIPHER, '-', "Cipher to use to encrypt the key"},
  49
  50     OPT_PROV_OPTIONS,
  51
  52     /* This is deliberately last. */
  53     {OPT_HELP_STR, 1, 1,
  54      "Order of options may be important!  See the documentation.\n"},
  55     {NULL}
  56 };
  57
  58 int genpkey_main(int argc, char **argv)
  59 {
  60     CONF *conf = NULL;
  61     BIO *in = NULL, *out = NULL;
  62     ENGINE *e = NULL;
  63     EVP_PKEY *pkey = NULL;
  64     EVP_PKEY_CTX *ctx = NULL;
  65     char *outfile = NULL, *passarg = NULL, *pass = NULL, *prog;
  66     const EVP_CIPHER *cipher = NULL;
  67     OPTION_CHOICE o;
  68     int outformat = FORMAT_PEM, text = 0, ret = 1, rv, do_param = 0;
  69     int private = 0;
  70     OSSL_LIB_CTX *libctx = app_get0_libctx();
  71     const char *propq = app_get0_propq();
  72
  73     prog = opt_init(argc, argv, genpkey_options);
  74     while ((o = opt_next()) != OPT_EOF) {
  75         switch (o) {
  76         case OPT_EOF:
  77         case OPT_ERR:
  78  opthelp:
  79             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  80             goto end;
  81         case OPT_HELP:
  82             ret = 0;
  83             opt_help(genpkey_options);
  84             goto end;
  85         case OPT_OUTFORM:
  86             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
  87                 goto opthelp;
  88             break;
  89         case OPT_OUT:
  90             outfile = opt_arg();
  91             break;
  92         case OPT_PASS:
  93             passarg = opt_arg();
  94             break;
  95         case OPT_ENGINE:
  96             e = setup_engine(opt_arg(), 0);
  97             break;
  98         case OPT_PARAMFILE:
  99             if (do_param == 1)
 100                 goto opthelp;
 101             if (!init_keygen_file(&ctx, opt_arg(), e, libctx, propq))
 102                 goto end;
 103             break;
 104         case OPT_ALGORITHM:
 105             if (!init_gen_str(&ctx, opt_arg(), e, do_param, libctx, propq))
 106                 goto end;
 107             break;
 108         case OPT_PKEYOPT:
 109             if (ctx == NULL) {
 110                 BIO_printf(bio_err, "%s: No keytype specified.\n", prog);
 111                 goto opthelp;
 112             }
 113             if (pkey_ctrl_string(ctx, opt_arg()) <= 0) {
 114                 BIO_printf(bio_err,
 115                            "%s: Error setting %s parameter:\n",
 116                            prog, opt_arg());
 117                 ERR_print_errors(bio_err);
 118                 goto end;
 119             }
 120             break;
 121         case OPT_GENPARAM:
 122             if (ctx != NULL) {
 123                 BIO_printf(bio_err,
 124                            "%s: '-genparam' option must be set before"
 125                             " the '-algorithm' option.\n", prog);
 126                 goto opthelp;
 127             }
 128             do_param = 1;
 129             break;
 130         case OPT_TEXT:
 131             text = 1;
 132             break;
 133         case OPT_CIPHER:
 134             if (!opt_cipher(opt_unknown(), &cipher)
 135                 || do_param == 1)
 136                 goto opthelp;
 137             if (EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE ||
 138                 EVP_CIPHER_mode(cipher) == EVP_CIPH_CCM_MODE ||
 139                 EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE ||
 140                 EVP_CIPHER_mode(cipher) == EVP_CIPH_OCB_MODE) {
 141                 BIO_printf(bio_err, "%s: cipher mode not supported\n", prog);
 142                 goto end;
 143             }
 144             break;
 145         case OPT_CONFIG:
 146             conf = app_load_config_modules(opt_arg());
 147             if (conf == NULL)
 148                 goto end;
 149             break;
 150         case OPT_PROV_CASES:
 151             if (!opt_provider(o))
 152                 goto end;
 153             break;
 154         }
 155     }
 156
 157     /* No extra arguments. */
 158     argc = opt_num_rest();
 159     if (argc != 0)
 160         goto opthelp;
 161
 162     private = do_param ? 0 : 1;
 163
 164     if (ctx == NULL)
 165         goto opthelp;
 166
 167     if (!app_passwd(passarg, NULL, &pass, NULL)) {
 168         BIO_puts(bio_err, "Error getting password\n");
 169         goto end;
 170     }
 171
 172     out = bio_open_owner(outfile, outformat, private);
 173     if (out == NULL)
 174         goto end;
 175
 176     EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
 177     EVP_PKEY_CTX_set_app_data(ctx, bio_err);
 178
 179     if (do_param) {
 180         if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) {
 181             BIO_puts(bio_err, "Error generating parameters\n");
 182             ERR_print_errors(bio_err);
 183             goto end;
 184         }
 185     } else {
 186         if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
 187             BIO_puts(bio_err, "Error generating key\n");
 188             ERR_print_errors(bio_err);
 189             goto end;
 190         }
 191     }
 192
 193     if (do_param) {
 194         rv = PEM_write_bio_Parameters(out, pkey);
 195     } else if (outformat == FORMAT_PEM) {
 196         assert(private);
 197         rv = PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0, NULL, pass);
 198     } else if (outformat == FORMAT_ASN1) {
 199         assert(private);
 200         rv = i2d_PrivateKey_bio(out, pkey);
 201     } else {
 202         BIO_printf(bio_err, "Bad format specified for key\n");
 203         goto end;
 204     }
 205
 206     ret = 0;
 207
 208     if (rv <= 0) {
 209         BIO_puts(bio_err, "Error writing key\n");
 210         ERR_print_errors(bio_err);
 211         ret = 1;
 212     }
 213
 214     if (text) {
 215         if (do_param)
 216             rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
 217         else
 218             rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
 219
 220         if (rv <= 0) {
 221             BIO_puts(bio_err, "Error printing key\n");
 222             ERR_print_errors(bio_err);
 223             ret = 1;
 224         }
 225     }
 226
 227  end:
 228     EVP_PKEY_free(pkey);
 229     EVP_PKEY_CTX_free(ctx);
 230     BIO_free_all(out);
 231     BIO_free(in);
 232     release_engine(e);
 233     OPENSSL_free(pass);
 234     NCONF_free(conf);
 235     return ret;
 236 }
 237
 238 static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e,
 239                             OSSL_LIB_CTX *libctx, const char *propq)
 240 {
 241     BIO *pbio;
 242     EVP_PKEY *pkey = NULL;
 243     EVP_PKEY_CTX *ctx = NULL;
 244     if (*pctx) {
 245         BIO_puts(bio_err, "Parameters already set!\n");
 246         return 0;
 247     }
 248
 249     pbio = BIO_new_file(file, "r");
 250     if (pbio == NULL) {
 251         BIO_printf(bio_err, "Can't open parameter file %s\n", file);
 252         return 0;
 253     }
 254
 255     pkey = PEM_read_bio_Parameters(pbio, NULL);
 256     BIO_free(pbio);
 257
 258     if (pkey == NULL) {
 259         BIO_printf(bio_err, "Error reading parameter file %s\n", file);
 260         return 0;
 261     }
 262
 263     if (e != NULL)
 264         ctx = EVP_PKEY_CTX_new(pkey, e);
 265     else
 266         ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);
 267     if (ctx == NULL)
 268         goto err;
 269     if (EVP_PKEY_keygen_init(ctx) <= 0)
 270         goto err;
 271     EVP_PKEY_free(pkey);
 272     *pctx = ctx;
 273     return 1;
 274
 275  err:
 276     BIO_puts(bio_err, "Error initializing context\n");
 277     ERR_print_errors(bio_err);
 278     EVP_PKEY_CTX_free(ctx);
 279     EVP_PKEY_free(pkey);
 280     return 0;
 281
 282 }
 283
 284 int init_gen_str(EVP_PKEY_CTX **pctx,
 285                  const char *algname, ENGINE *e, int do_param,
 286                  OSSL_LIB_CTX *libctx, const char *propq)
 287 {
 288     EVP_PKEY_CTX *ctx = NULL;
 289     int pkey_id;
 290
 291     if (*pctx) {
 292         BIO_puts(bio_err, "Algorithm already set!\n");
 293         return 0;
 294     }
 295
 296     pkey_id = get_legacy_pkey_id(libctx, algname, e);
 297     if (pkey_id != NID_undef)
 298         ctx = EVP_PKEY_CTX_new_id(pkey_id, e);
 299     else
 300         ctx = EVP_PKEY_CTX_new_from_name(libctx, algname, propq);
 301
 302     if (ctx == NULL)
 303         goto err;
 304     if (do_param) {
 305         if (EVP_PKEY_paramgen_init(ctx) <= 0)
 306             goto err;
 307     } else {
 308         if (EVP_PKEY_keygen_init(ctx) <= 0)
 309             goto err;
 310     }
 311
 312     *pctx = ctx;
 313     return 1;
 314
 315  err:
 316     BIO_printf(bio_err, "Error initializing %s context\n", algname);
 317     ERR_print_errors(bio_err);
 318     EVP_PKEY_CTX_free(ctx);
 319     return 0;
 320
 321 }
 322
 323 static int genpkey_cb(EVP_PKEY_CTX *ctx)
 324 {
 325     char c = '*';
 326     BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
 327     int p;
 328     p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
 329     if (p == 0)
 330         c = '.';
 331     if (p == 1)
 332         c = '+';
 333     if (p == 2)
 334         c = '*';
 335     if (p == 3)
 336         c = '\n';
 337     BIO_write(b, &c, 1);
 338     (void)BIO_flush(b);
 339     return 1;
 340 }