apps/dsa.c

   1 /*
   2  * Copyright 1995-2018 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 /* We need to use the deprecated DSA_print */
  11 #define OPENSSL_SUPPRESS_DEPRECATED
  12
  13 #include <openssl/opensslconf.h>
  14 #ifdef OPENSSL_NO_DSA
  15 NON_EMPTY_TRANSLATION_UNIT
  16 #else
  17
  18 # include <stdio.h>
  19 # include <stdlib.h>
  20 # include <string.h>
  21 # include <time.h>
  22 # include "apps.h"
  23 # include "progs.h"
  24 # include <openssl/bio.h>
  25 # include <openssl/err.h>
  26 # include <openssl/dsa.h>
  27 # include <openssl/evp.h>
  28 # include <openssl/x509.h>
  29 # include <openssl/pem.h>
  30 # include <openssl/bn.h>
  31
  32 typedef enum OPTION_choice {
  33     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  34     OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENGINE,
  35     /* Do not change the order here; see case statements below */
  36     OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
  37     OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
  38     OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT,
  39     OPT_PROV_ENUM
  40 } OPTION_CHOICE;
  41
  42 const OPTIONS dsa_options[] = {
  43     OPT_SECTION("General"),
  44     {"help", OPT_HELP, '-', "Display this summary"},
  45     {"", OPT_CIPHER, '-', "Any supported cipher"},
  46 # ifndef OPENSSL_NO_RC4
  47     {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
  48     {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
  49     {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
  50 # endif
  51 # ifndef OPENSSL_NO_ENGINE
  52     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
  53 # endif
  54
  55     OPT_SECTION("Input"),
  56     {"in", OPT_IN, 's', "Input key"},
  57     {"inform", OPT_INFORM, 'f', "Input format, DER PEM PVK"},
  58     {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
  59     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  60
  61     OPT_SECTION("Output"),
  62     {"out", OPT_OUT, '>', "Output file"},
  63     {"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"},
  64     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  65     {"text", OPT_TEXT, '-', "Print the key in text"},
  66     {"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
  67     {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
  68     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
  69
  70     OPT_PROV_OPTIONS,
  71     {NULL}
  72 };
  73
  74 int dsa_main(int argc, char **argv)
  75 {
  76     BIO *out = NULL;
  77     DSA *dsa = NULL;
  78     ENGINE *e = NULL;
  79     const EVP_CIPHER *enc = NULL;
  80     char *infile = NULL, *outfile = NULL, *prog;
  81     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
  82     OPTION_CHOICE o;
  83     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
  84     int i, modulus = 0, pubin = 0, pubout = 0, ret = 1;
  85 # ifndef OPENSSL_NO_RC4
  86     int pvk_encr = 2;
  87 # endif
  88     int private = 0;
  89
  90     prog = opt_init(argc, argv, dsa_options);
  91     while ((o = opt_next()) != OPT_EOF) {
  92         switch (o) {
  93         case OPT_EOF:
  94         case OPT_ERR:
  95  opthelp:
  96             ret = 0;
  97             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  98             goto end;
  99         case OPT_HELP:
 100             opt_help(dsa_options);
 101             ret = 0;
 102             goto end;
 103         case OPT_INFORM:
 104             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 105                 goto opthelp;
 106             break;
 107         case OPT_IN:
 108             infile = opt_arg();
 109             break;
 110         case OPT_OUTFORM:
 111             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 112                 goto opthelp;
 113             break;
 114         case OPT_OUT:
 115             outfile = opt_arg();
 116             break;
 117         case OPT_ENGINE:
 118             e = setup_engine(opt_arg(), 0);
 119             break;
 120         case OPT_PASSIN:
 121             passinarg = opt_arg();
 122             break;
 123         case OPT_PASSOUT:
 124             passoutarg = opt_arg();
 125             break;
 126         case OPT_PVK_STRONG:    /* pvk_encr:= 2 */
 127         case OPT_PVK_WEAK:      /* pvk_encr:= 1 */
 128         case OPT_PVK_NONE:      /* pvk_encr:= 0 */
 129 #ifndef OPENSSL_NO_RC4
 130             pvk_encr = (o - OPT_PVK_NONE);
 131 #endif
 132             break;
 133         case OPT_NOOUT:
 134             noout = 1;
 135             break;
 136         case OPT_TEXT:
 137             text = 1;
 138             break;
 139         case OPT_MODULUS:
 140             modulus = 1;
 141             break;
 142         case OPT_PUBIN:
 143             pubin = 1;
 144             break;
 145         case OPT_PUBOUT:
 146             pubout = 1;
 147             break;
 148         case OPT_CIPHER:
 149             if (!opt_cipher(opt_unknown(), &enc))
 150                 goto end;
 151             break;
 152         case OPT_PROV_CASES:
 153             if (!opt_provider(o))
 154                 goto end;
 155             break;
 156         }
 157     }
 158     argc = opt_num_rest();
 159     if (argc != 0)
 160         goto opthelp;
 161
 162     private = pubin || pubout ? 0 : 1;
 163     if (text && !pubin)
 164         private = 1;
 165
 166     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 167         BIO_printf(bio_err, "Error getting passwords\n");
 168         goto end;
 169     }
 170
 171     BIO_printf(bio_err, "read DSA key\n");
 172     {
 173         EVP_PKEY *pkey;
 174
 175         if (pubin)
 176             pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
 177         else
 178             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
 179
 180         if (pkey != NULL) {
 181             dsa = EVP_PKEY_get1_DSA(pkey);
 182             EVP_PKEY_free(pkey);
 183         }
 184     }
 185
 186     if (dsa == NULL) {
 187         BIO_printf(bio_err, "unable to load Key\n");
 188         ERR_print_errors(bio_err);
 189         goto end;
 190     }
 191
 192     out = bio_open_owner(outfile, outformat, private);
 193     if (out == NULL)
 194         goto end;
 195
 196     if (text) {
 197         assert(pubin || private);
 198         if (!DSA_print(out, dsa, 0)) {
 199             perror(outfile);
 200             ERR_print_errors(bio_err);
 201             goto end;
 202         }
 203     }
 204
 205     if (modulus) {
 206         const BIGNUM *pub_key = NULL;
 207         DSA_get0_key(dsa, &pub_key, NULL);
 208         BIO_printf(out, "Public Key=");
 209         BN_print(out, pub_key);
 210         BIO_printf(out, "\n");
 211     }
 212
 213     if (noout) {
 214         ret = 0;
 215         goto end;
 216     }
 217     BIO_printf(bio_err, "writing DSA key\n");
 218     if (outformat == FORMAT_ASN1) {
 219         if (pubin || pubout) {
 220             i = i2d_DSA_PUBKEY_bio(out, dsa);
 221         } else {
 222             assert(private);
 223             i = i2d_DSAPrivateKey_bio(out, dsa);
 224         }
 225     } else if (outformat == FORMAT_PEM) {
 226         if (pubin || pubout) {
 227             i = PEM_write_bio_DSA_PUBKEY(out, dsa);
 228         } else {
 229             assert(private);
 230             i = PEM_write_bio_DSAPrivateKey(out, dsa, enc,
 231                                             NULL, 0, NULL, passout);
 232         }
 233 # ifndef OPENSSL_NO_RSA
 234     } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
 235         EVP_PKEY *pk;
 236         pk = EVP_PKEY_new();
 237         if (pk == NULL)
 238            goto end;
 239
 240         EVP_PKEY_set1_DSA(pk, dsa);
 241         if (outformat == FORMAT_PVK) {
 242             if (pubin) {
 243                 BIO_printf(bio_err, "PVK form impossible with public key input\n");
 244                 EVP_PKEY_free(pk);
 245                 goto end;
 246             }
 247             assert(private);
 248 #  ifdef OPENSSL_NO_RC4
 249             BIO_printf(bio_err, "PVK format not supported\n");
 250             EVP_PKEY_free(pk);
 251             goto end;
 252 #  else
 253             i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
 254 #  endif
 255         } else if (pubin || pubout) {
 256             i = i2b_PublicKey_bio(out, pk);
 257         } else {
 258             assert(private);
 259             i = i2b_PrivateKey_bio(out, pk);
 260         }
 261         EVP_PKEY_free(pk);
 262 # endif
 263     } else {
 264         BIO_printf(bio_err, "bad output format specified for outfile\n");
 265         goto end;
 266     }
 267     if (i <= 0) {
 268         BIO_printf(bio_err, "unable to write private key\n");
 269         ERR_print_errors(bio_err);
 270         goto end;
 271     }
 272     ret = 0;
 273  end:
 274     BIO_free_all(out);
 275     DSA_free(dsa);
 276     release_engine(e);
 277     OPENSSL_free(passin);
 278     OPENSSL_free(passout);
 279     return ret;
 280 }
 281 #endif