+static int dsa_cb(int p, int n, BN_GENCB *cb);
+
+typedef enum OPTION_choice {
+ OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
+ OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
+ OPT_NOOUT, OPT_GENKEY, OPT_RAND, OPT_NON_FIPS_ALLOW, OPT_ENGINE,
+ OPT_TIMEBOMB
+} OPTION_CHOICE;
+
+OPTIONS dsaparam_options[] = {
+ {"help", OPT_HELP, '-', "Display this summary"},
+ {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
+ {"in", OPT_IN, '<', "Input file"},
+ {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
+ {"out", OPT_OUT, '>', "Output file"},
+ {"text", OPT_TEXT, '-', "Print as text"},
+ {"C", OPT_C, '-', "Output C code"},
+ {"noout", OPT_NOOUT, '-', "No output"},
+ {"genkey", OPT_GENKEY, '-', "Generate a DSA key"},
+ {"rand", OPT_RAND, 's', "Files to use for random number input"},
+ {"non-fips-allow", OPT_NON_FIPS_ALLOW, '-'},
+# ifndef OPENSSL_NO_ENGINE
+ {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
+# endif
+# ifdef GENCB_TEST
+ {"timebomb", OPT_TIMEBOMB, 'p', "Interrupt keygen after 'pnum' seconds"},
+# endif
+ {NULL}
+};
+
+int dsaparam_main(int argc, char **argv)
+{
+ DSA *dsa = NULL;
+ BIO *in = NULL, *out = NULL;
+ BN_GENCB *cb = NULL;
+ int numbits = -1, num, genkey = 0, need_rand = 0, non_fips_allow = 0;
+ int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0, ret =
+ 1;
+ int i, text = 0;
+# ifdef GENCB_TEST
+ int timebomb = 0;
+# endif
+ char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL;
+ OPTION_CHOICE o;
+
+ prog = opt_init(argc, argv, dsaparam_options);
+ while ((o = opt_next()) != OPT_EOF) {
+ switch (o) {
+ case OPT_EOF:
+ case OPT_ERR:
+ opthelp:
+ BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
+ goto end;
+ case OPT_HELP:
+ opt_help(dsaparam_options);
+ ret = 0;
+ goto end;
+ case OPT_INFORM:
+ if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
+ goto opthelp;
+ break;
+ case OPT_IN:
+ infile = opt_arg();
+ break;
+ case OPT_OUTFORM:
+ if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
+ goto opthelp;
+ break;
+ case OPT_OUT:
+ outfile = opt_arg();
+ break;
+ case OPT_ENGINE:
+ (void)setup_engine(opt_arg(), 0);
+ break;
+ case OPT_TIMEBOMB:
+# ifdef GENCB_TEST
+ timebomb = atoi(opt_arg());
+ break;
+# endif
+ case OPT_TEXT:
+ text = 1;
+ break;
+ case OPT_C:
+ C = 1;
+ break;
+ case OPT_GENKEY:
+ genkey = need_rand = 1;
+ break;
+ case OPT_RAND:
+ inrand = opt_arg();
+ need_rand = 1;
+ break;
+ case OPT_NOOUT:
+ noout = 1;
+ break;
+ case OPT_NON_FIPS_ALLOW:
+ non_fips_allow = 1;
+ break;
+ }
+ }
+ argc = opt_num_rest();
+ argv = opt_rest();
+
+ if (argc == 1) {
+ if (!opt_int(argv[0], &num))
+ goto end;
+ /* generate a key */
+ numbits = num;
+ need_rand = 1;
+ }
+
+ in = bio_open_default(infile, "r");
+ if (in == NULL)
+ goto end;
+ out = bio_open_default(outfile, "w");
+ if (out == NULL)
+ goto end;
+
+ if (need_rand) {
+ app_RAND_load_file(NULL, (inrand != NULL));
+ if (inrand != NULL)
+ BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
+ app_RAND_load_files(inrand));
+ }
+
+ if (numbits > 0) {
+ cb = BN_GENCB_new();
+ if (!cb) {
+ BIO_printf(bio_err, "Error allocating BN_GENCB object\n");
+ goto end;
+ }
+ BN_GENCB_set(cb, dsa_cb, bio_err);
+ assert(need_rand);
+ dsa = DSA_new();
+ if (!dsa) {
+ BIO_printf(bio_err, "Error allocating DSA object\n");
+ goto end;
+ }
+ if (non_fips_allow)
+ dsa->flags |= DSA_FLAG_NON_FIPS_ALLOW;
+ BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
+ num);
+ BIO_printf(bio_err, "This could take some time\n");
+# ifdef GENCB_TEST
+ if (timebomb > 0) {
+ struct sigaction act;
+ act.sa_handler = timebomb_sigalarm;
+ act.sa_flags = 0;
+ BIO_printf(bio_err,
+ "(though I'll stop it if not done within %d secs)\n",
+ timebomb);
+ if (sigaction(SIGALRM, &act, NULL) != 0) {
+ BIO_printf(bio_err, "Error, couldn't set SIGALRM handler\n");
+ goto end;
+ }
+ alarm(timebomb);
+ }
+# endif
+ if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, cb)) {
+# ifdef GENCB_TEST
+ if (stop_keygen_flag) {
+ BIO_printf(bio_err, "DSA key generation time-stopped\n");
+ /* This is an asked-for behaviour! */
+ ret = 0;
+ goto end;
+ }
+# endif
+ ERR_print_errors(bio_err);
+ BIO_printf(bio_err, "Error, DSA key generation failed\n");
+ goto end;
+ }
+ } else if (informat == FORMAT_ASN1)
+ dsa = d2i_DSAparams_bio(in, NULL);
+ else
+ dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
+ if (dsa == NULL) {
+ BIO_printf(bio_err, "unable to load DSA parameters\n");
+ ERR_print_errors(bio_err);
+ goto end;
+ }
+
+ if (text) {
+ DSAparams_print(out, dsa);
+ }
+
+ if (C) {
+ int len = BN_num_bytes(dsa->p);
+ int bits_p = BN_num_bits(dsa->p);
+ unsigned char *data = app_malloc(len + 20, "BN space");
+
+ BIO_printf(bio_out, "DSA *get_dsa%d()\n{\n", bits_p);
+ print_bignum_var(bio_out, dsa->p, "dsap", len, data);
+ print_bignum_var(bio_out, dsa->q, "dsaq", len, data);
+ print_bignum_var(bio_out, dsa->g, "dsag", len, data);
+ BIO_printf(bio_out, " DSA *dsa = DSA_new();\n"
+ "\n");
+ BIO_printf(bio_out, " if (dsa == NULL)\n"
+ " return NULL;\n");
+ BIO_printf(bio_out, " dsa->p = BN_bin2bn(dsap_%d, sizeof (dsap_%d), NULL);\n",
+ bits_p, bits_p);
+ BIO_printf(bio_out, " dsa->q = BN_bin2bn(dsaq_%d, sizeof (dsaq_%d), NULL);\n",
+ bits_p, bits_p);
+ BIO_printf(bio_out, " dsa->g = BN_bin2bn(dsag_%d, sizeof (dsag_%d), NULL);\n",
+ bits_p, bits_p);
+ BIO_printf(bio_out, " if (!dsa->p || !dsa->q || !dsa->g) {\n"
+ " DSA_free(dsa);\n"
+ " return NULL;\n"
+ " }\n"
+ " return(dsa);\n}\n");
+ }
+
+ if (!noout) {
+ if (outformat == FORMAT_ASN1)
+ i = i2d_DSAparams_bio(out, dsa);
+ else
+ i = PEM_write_bio_DSAparams(out, dsa);
+ if (!i) {
+ BIO_printf(bio_err, "unable to write DSA parameters\n");
+ ERR_print_errors(bio_err);
+ goto end;
+ }
+ }
+ if (genkey) {
+ DSA *dsakey;
+
+ assert(need_rand);
+ if ((dsakey = DSAparams_dup(dsa)) == NULL)
+ goto end;
+ if (non_fips_allow)
+ dsakey->flags |= DSA_FLAG_NON_FIPS_ALLOW;
+ if (!DSA_generate_key(dsakey)) {
+ ERR_print_errors(bio_err);
+ DSA_free(dsakey);
+ goto end;
+ }
+ if (outformat == FORMAT_ASN1)
+ i = i2d_DSAPrivateKey_bio(out, dsakey);
+ else
+ i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
+ NULL);
+ DSA_free(dsakey);
+ }
+ if (need_rand)
+ app_RAND_write_file(NULL);
+ ret = 0;
+ end:
+ BN_GENCB_free(cb);
+ BIO_free(in);
+ BIO_free_all(out);
+ DSA_free(dsa);
+ return (ret);
+}
+
+static int dsa_cb(int p, int n, BN_GENCB *cb)
+{
+ char c = '*';
+
+ if (p == 0)
+ c = '.';
+ if (p == 1)
+ c = '+';
+ if (p == 2)
+ c = '*';
+ if (p == 3)
+ c = '\n';
+ BIO_write(BN_GENCB_get_arg(cb), &c, 1);
+ (void)BIO_flush(BN_GENCB_get_arg(cb));
+# ifdef GENCB_TEST
+ if (stop_keygen_flag)
+ return 0;
+# endif
+ return 1;
+}
+#else /* !OPENSSL_NO_DSA */