apps/genpkey.c

   1 /*
   2  * Copyright 2006-2018 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 #ifndef OPENSSL_NO_ENGINE
  18 # include <openssl/engine.h>
  19 #endif
  20
  21 static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e);
  22 static int genpkey_cb(EVP_PKEY_CTX *ctx);
  23
  24 typedef enum OPTION_choice {
  25     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  26     OPT_ENGINE, OPT_OUTFORM, OPT_OUT, OPT_PASS, OPT_PARAMFILE,
  27     OPT_ALGORITHM, OPT_PKEYOPT, OPT_GENPARAM, OPT_TEXT, OPT_CIPHER
  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
  41     OPT_SECTION("Output"),
  42     {"out", OPT_OUT, '>', "Output file"},
  43     {"outform", OPT_OUTFORM, 'F', "output format (DER or PEM)"},
  44     {"pass", OPT_PASS, 's', "Output file pass phrase source"},
  45     {"genparam", OPT_GENPARAM, '-', "Generate parameters, not key"},
  46     {"text", OPT_TEXT, '-', "Print the in text"},
  47     {"", OPT_CIPHER, '-', "Cipher to use to encrypt the key"},
  48
  49     /* This is deliberately last. */
  50     {OPT_HELP_STR, 1, 1,
  51      "Order of options may be important!  See the documentation.\n"},
  52     {NULL}
  53 };
  54
  55 int genpkey_main(int argc, char **argv)
  56 {
  57     BIO *in = NULL, *out = NULL;
  58     ENGINE *e = NULL;
  59     EVP_PKEY *pkey = NULL;
  60     EVP_PKEY_CTX *ctx = NULL;
  61     char *outfile = NULL, *passarg = NULL, *pass = NULL, *prog;
  62     const EVP_CIPHER *cipher = NULL;
  63     OPTION_CHOICE o;
  64     int outformat = FORMAT_PEM, text = 0, ret = 1, rv, do_param = 0;
  65     int private = 0;
  66
  67     prog = opt_init(argc, argv, genpkey_options);
  68     while ((o = opt_next()) != OPT_EOF) {
  69         switch (o) {
  70         case OPT_EOF:
  71         case OPT_ERR:
  72  opthelp:
  73             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  74             goto end;
  75         case OPT_HELP:
  76             ret = 0;
  77             opt_help(genpkey_options);
  78             goto end;
  79         case OPT_OUTFORM:
  80             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
  81                 goto opthelp;
  82             break;
  83         case OPT_OUT:
  84             outfile = opt_arg();
  85             break;
  86         case OPT_PASS:
  87             passarg = opt_arg();
  88             break;
  89         case OPT_ENGINE:
  90             e = setup_engine(opt_arg(), 0);
  91             break;
  92         case OPT_PARAMFILE:
  93             if (do_param == 1)
  94                 goto opthelp;
  95             if (!init_keygen_file(&ctx, opt_arg(), e))
  96                 goto end;
  97             break;
  98         case OPT_ALGORITHM:
  99             if (!init_gen_str(&ctx, opt_arg(), e, do_param))
 100                 goto end;
 101             break;
 102         case OPT_PKEYOPT:
 103             if (ctx == NULL) {
 104                 BIO_printf(bio_err, "%s: No keytype specified.\n", prog);
 105                 goto opthelp;
 106             }
 107             if (pkey_ctrl_string(ctx, opt_arg()) <= 0) {
 108                 BIO_printf(bio_err,
 109                            "%s: Error setting %s parameter:\n",
 110                            prog, opt_arg());
 111                 ERR_print_errors(bio_err);
 112                 goto end;
 113             }
 114             break;
 115         case OPT_GENPARAM:
 116             if (ctx != NULL)
 117                 goto opthelp;
 118             do_param = 1;
 119             break;
 120         case OPT_TEXT:
 121             text = 1;
 122             break;
 123         case OPT_CIPHER:
 124             if (!opt_cipher(opt_unknown(), &cipher)
 125                 || do_param == 1)
 126                 goto opthelp;
 127             if (EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE ||
 128                 EVP_CIPHER_mode(cipher) == EVP_CIPH_CCM_MODE ||
 129                 EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE ||
 130                 EVP_CIPHER_mode(cipher) == EVP_CIPH_OCB_MODE) {
 131                 BIO_printf(bio_err, "%s: cipher mode not supported\n", prog);
 132                 goto end;
 133             }
 134         }
 135     }
 136     argc = opt_num_rest();
 137     if (argc != 0)
 138         goto opthelp;
 139
 140     private = do_param ? 0 : 1;
 141
 142     if (ctx == NULL)
 143         goto opthelp;
 144
 145     if (!app_passwd(passarg, NULL, &pass, NULL)) {
 146         BIO_puts(bio_err, "Error getting password\n");
 147         goto end;
 148     }
 149
 150     out = bio_open_owner(outfile, outformat, private);
 151     if (out == NULL)
 152         goto end;
 153
 154     EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
 155     EVP_PKEY_CTX_set_app_data(ctx, bio_err);
 156
 157     if (do_param) {
 158         if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) {
 159             BIO_puts(bio_err, "Error generating parameters\n");
 160             ERR_print_errors(bio_err);
 161             goto end;
 162         }
 163     } else {
 164         if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
 165             BIO_puts(bio_err, "Error generating key\n");
 166             ERR_print_errors(bio_err);
 167             goto end;
 168         }
 169     }
 170
 171     if (do_param) {
 172         rv = PEM_write_bio_Parameters(out, pkey);
 173     } else if (outformat == FORMAT_PEM) {
 174         assert(private);
 175         rv = PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0, NULL, pass);
 176     } else if (outformat == FORMAT_ASN1) {
 177         assert(private);
 178         rv = i2d_PrivateKey_bio(out, pkey);
 179     } else {
 180         BIO_printf(bio_err, "Bad format specified for key\n");
 181         goto end;
 182     }
 183
 184     if (rv <= 0) {
 185         BIO_puts(bio_err, "Error writing key\n");
 186         ERR_print_errors(bio_err);
 187     }
 188
 189     if (text) {
 190         if (do_param)
 191             rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
 192         else
 193             rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
 194
 195         if (rv <= 0) {
 196             BIO_puts(bio_err, "Error printing key\n");
 197             ERR_print_errors(bio_err);
 198         }
 199     }
 200
 201     ret = 0;
 202
 203  end:
 204     EVP_PKEY_free(pkey);
 205     EVP_PKEY_CTX_free(ctx);
 206     BIO_free_all(out);
 207     BIO_free(in);
 208     release_engine(e);
 209     OPENSSL_free(pass);
 210     return ret;
 211 }
 212
 213 static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e)
 214 {
 215     BIO *pbio;
 216     EVP_PKEY *pkey = NULL;
 217     EVP_PKEY_CTX *ctx = NULL;
 218     if (*pctx) {
 219         BIO_puts(bio_err, "Parameters already set!\n");
 220         return 0;
 221     }
 222
 223     pbio = BIO_new_file(file, "r");
 224     if (pbio == NULL) {
 225         BIO_printf(bio_err, "Can't open parameter file %s\n", file);
 226         return 0;
 227     }
 228
 229     pkey = PEM_read_bio_Parameters(pbio, NULL);
 230     BIO_free(pbio);
 231
 232     if (pkey == NULL) {
 233         BIO_printf(bio_err, "Error reading parameter file %s\n", file);
 234         return 0;
 235     }
 236
 237     ctx = EVP_PKEY_CTX_new(pkey, e);
 238     if (ctx == NULL)
 239         goto err;
 240     if (EVP_PKEY_keygen_init(ctx) <= 0)
 241         goto err;
 242     EVP_PKEY_free(pkey);
 243     *pctx = ctx;
 244     return 1;
 245
 246  err:
 247     BIO_puts(bio_err, "Error initializing context\n");
 248     ERR_print_errors(bio_err);
 249     EVP_PKEY_CTX_free(ctx);
 250     EVP_PKEY_free(pkey);
 251     return 0;
 252
 253 }
 254
 255 int init_gen_str(EVP_PKEY_CTX **pctx,
 256                  const char *algname, ENGINE *e, int do_param)
 257 {
 258     EVP_PKEY_CTX *ctx = NULL;
 259     const EVP_PKEY_ASN1_METHOD *ameth;
 260     ENGINE *tmpeng = NULL;
 261     int pkey_id;
 262
 263     if (*pctx) {
 264         BIO_puts(bio_err, "Algorithm already set!\n");
 265         return 0;
 266     }
 267
 268     ameth = EVP_PKEY_asn1_find_str(&tmpeng, algname, -1);
 269
 270 #ifndef OPENSSL_NO_ENGINE
 271     if (!ameth && e)
 272         ameth = ENGINE_get_pkey_asn1_meth_str(e, algname, -1);
 273 #endif
 274
 275     if (!ameth) {
 276         BIO_printf(bio_err, "Algorithm %s not found\n", algname);
 277         return 0;
 278     }
 279
 280     ERR_clear_error();
 281
 282     EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
 283 #ifndef OPENSSL_NO_ENGINE
 284     ENGINE_finish(tmpeng);
 285 #endif
 286     ctx = EVP_PKEY_CTX_new_id(pkey_id, e);
 287
 288     if (!ctx)
 289         goto err;
 290     if (do_param) {
 291         if (EVP_PKEY_paramgen_init(ctx) <= 0)
 292             goto err;
 293     } else {
 294         if (EVP_PKEY_keygen_init(ctx) <= 0)
 295             goto err;
 296     }
 297
 298     *pctx = ctx;
 299     return 1;
 300
 301  err:
 302     BIO_printf(bio_err, "Error initializing %s context\n", algname);
 303     ERR_print_errors(bio_err);
 304     EVP_PKEY_CTX_free(ctx);
 305     return 0;
 306
 307 }
 308
 309 static int genpkey_cb(EVP_PKEY_CTX *ctx)
 310 {
 311     char c = '*';
 312     BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
 313     int p;
 314     p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
 315     if (p == 0)
 316         c = '.';
 317     if (p == 1)
 318         c = '+';
 319     if (p == 2)
 320         c = '*';
 321     if (p == 3)
 322         c = '\n';
 323     BIO_write(b, &c, 1);
 324     (void)BIO_flush(b);
 325     return 1;
 326 }