apps/dsa.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 <openssl/opensslconf.h>
  11 #ifdef OPENSSL_NO_DSA
  12 NON_EMPTY_TRANSLATION_UNIT
  13 #else
  14
  15 # include <stdio.h>
  16 # include <stdlib.h>
  17 # include <string.h>
  18 # include <time.h>
  19 # include "apps.h"
  20 # include "progs.h"
  21 # include <openssl/bio.h>
  22 # include <openssl/err.h>
  23 # include <openssl/dsa.h>
  24 # include <openssl/evp.h>
  25 # include <openssl/x509.h>
  26 # include <openssl/pem.h>
  27 # include <openssl/bn.h>
  28
  29 typedef enum OPTION_choice {
  30     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  31     OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENGINE,
  32     /* Do not change the order here; see case statements below */
  33     OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
  34     OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
  35     OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT
  36 } OPTION_CHOICE;
  37
  38 const OPTIONS dsa_options[] = {
  39     {"help", OPT_HELP, '-', "Display this summary"},
  40     {"inform", OPT_INFORM, 'f', "Input format, DER PEM PVK"},
  41     {"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"},
  42     {"in", OPT_IN, 's', "Input key"},
  43     {"out", OPT_OUT, '>', "Output file"},
  44     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  45     {"text", OPT_TEXT, '-', "Print the key in text"},
  46     {"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
  47     {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
  48     {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
  49     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  50     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
  51     {"", OPT_CIPHER, '-', "Any supported cipher"},
  52 # ifndef OPENSSL_NO_RC4
  53     {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
  54     {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
  55     {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
  56 # endif
  57 # ifndef OPENSSL_NO_ENGINE
  58     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
  59 # endif
  60     {NULL}
  61 };
  62
  63 int dsa_main(int argc, char **argv)
  64 {
  65     BIO *out = NULL;
  66     DSA *dsa = NULL;
  67     ENGINE *e = NULL;
  68     const EVP_CIPHER *enc = NULL;
  69     char *infile = NULL, *outfile = NULL, *prog;
  70     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
  71     OPTION_CHOICE o;
  72     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
  73     int i, modulus = 0, pubin = 0, pubout = 0, ret = 1;
  74 # ifndef OPENSSL_NO_RC4
  75     int pvk_encr = 2;
  76 # endif
  77     int private = 0;
  78
  79     prog = opt_init(argc, argv, dsa_options);
  80     while ((o = opt_next()) != OPT_EOF) {
  81         switch (o) {
  82         case OPT_EOF:
  83         case OPT_ERR:
  84  opthelp:
  85             ret = 0;
  86             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  87             goto end;
  88         case OPT_HELP:
  89             opt_help(dsa_options);
  90             ret = 0;
  91             goto end;
  92         case OPT_INFORM:
  93             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
  94                 goto opthelp;
  95             break;
  96         case OPT_IN:
  97             infile = opt_arg();
  98             break;
  99         case OPT_OUTFORM:
 100             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
 101                 goto opthelp;
 102             break;
 103         case OPT_OUT:
 104             outfile = opt_arg();
 105             break;
 106         case OPT_ENGINE:
 107             e = setup_engine(opt_arg(), 0);
 108             break;
 109         case OPT_PASSIN:
 110             passinarg = opt_arg();
 111             break;
 112         case OPT_PASSOUT:
 113             passoutarg = opt_arg();
 114             break;
 115         case OPT_PVK_STRONG:    /* pvk_encr:= 2 */
 116         case OPT_PVK_WEAK:      /* pvk_encr:= 1 */
 117         case OPT_PVK_NONE:      /* pvk_encr:= 0 */
 118 #ifndef OPENSSL_NO_RC4
 119             pvk_encr = (o - OPT_PVK_NONE);
 120 #endif
 121             break;
 122         case OPT_NOOUT:
 123             noout = 1;
 124             break;
 125         case OPT_TEXT:
 126             text = 1;
 127             break;
 128         case OPT_MODULUS:
 129             modulus = 1;
 130             break;
 131         case OPT_PUBIN:
 132             pubin = 1;
 133             break;
 134         case OPT_PUBOUT:
 135             pubout = 1;
 136             break;
 137         case OPT_CIPHER:
 138             if (!opt_cipher(opt_unknown(), &enc))
 139                 goto end;
 140             break;
 141         }
 142     }
 143     argc = opt_num_rest();
 144     if (argc != 0)
 145         goto opthelp;
 146
 147     private = pubin || pubout ? 0 : 1;
 148     if (text && !pubin)
 149         private = 1;
 150
 151     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 152         BIO_printf(bio_err, "Error getting passwords\n");
 153         goto end;
 154     }
 155
 156     BIO_printf(bio_err, "read DSA key\n");
 157     {
 158         EVP_PKEY *pkey;
 159
 160         if (pubin)
 161             pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
 162         else
 163             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
 164
 165         if (pkey != NULL) {
 166             dsa = EVP_PKEY_get1_DSA(pkey);
 167             EVP_PKEY_free(pkey);
 168         }
 169     }
 170     if (dsa == NULL) {
 171         BIO_printf(bio_err, "unable to load Key\n");
 172         ERR_print_errors(bio_err);
 173         goto end;
 174     }
 175
 176     out = bio_open_owner(outfile, outformat, private);
 177     if (out == NULL)
 178         goto end;
 179
 180     if (text) {
 181         assert(pubin || private);
 182         if (!DSA_print(out, dsa, 0)) {
 183             perror(outfile);
 184             ERR_print_errors(bio_err);
 185             goto end;
 186         }
 187     }
 188
 189     if (modulus) {
 190         const BIGNUM *pub_key = NULL;
 191         DSA_get0_key(dsa, &pub_key, NULL);
 192         BIO_printf(out, "Public Key=");
 193         BN_print(out, pub_key);
 194         BIO_printf(out, "\n");
 195     }
 196
 197     if (noout) {
 198         ret = 0;
 199         goto end;
 200     }
 201     BIO_printf(bio_err, "writing DSA key\n");
 202     if (outformat == FORMAT_ASN1) {
 203         if (pubin || pubout) {
 204             i = i2d_DSA_PUBKEY_bio(out, dsa);
 205         } else {
 206             assert(private);
 207             i = i2d_DSAPrivateKey_bio(out, dsa);
 208         }
 209     } else if (outformat == FORMAT_PEM) {
 210         if (pubin || pubout) {
 211             i = PEM_write_bio_DSA_PUBKEY(out, dsa);
 212         } else {
 213             assert(private);
 214             i = PEM_write_bio_DSAPrivateKey(out, dsa, enc,
 215                                             NULL, 0, NULL, passout);
 216         }
 217 # ifndef OPENSSL_NO_RSA
 218     } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
 219         EVP_PKEY *pk;
 220         pk = EVP_PKEY_new();
 221         if (pk == NULL)
 222            goto end;
 223
 224         EVP_PKEY_set1_DSA(pk, dsa);
 225         if (outformat == FORMAT_PVK) {
 226             if (pubin) {
 227                 BIO_printf(bio_err, "PVK form impossible with public key input\n");
 228                 EVP_PKEY_free(pk);
 229                 goto end;
 230             }
 231             assert(private);
 232 #  ifdef OPENSSL_NO_RC4
 233             BIO_printf(bio_err, "PVK format not supported\n");
 234             EVP_PKEY_free(pk);
 235             goto end;
 236 #  else
 237             i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
 238 #  endif
 239         } else if (pubin || pubout) {
 240             i = i2b_PublicKey_bio(out, pk);
 241         } else {
 242             assert(private);
 243             i = i2b_PrivateKey_bio(out, pk);
 244         }
 245         EVP_PKEY_free(pk);
 246 # endif
 247     } else {
 248         BIO_printf(bio_err, "bad output format specified for outfile\n");
 249         goto end;
 250     }
 251     if (i <= 0) {
 252         BIO_printf(bio_err, "unable to write private key\n");
 253         ERR_print_errors(bio_err);
 254         goto end;
 255     }
 256     ret = 0;
 257  end:
 258     BIO_free_all(out);
 259     DSA_free(dsa);
 260     release_engine(e);
 261     OPENSSL_free(passin);
 262     OPENSSL_free(passout);
 263     return ret;
 264 }
 265 #endif