+ OPT_SECTION("Input"),
+ {"in", OPT_IN, '<', "Input file"},
+ {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
+
+ OPT_SECTION("Output"),
+ {"out", OPT_OUT, '>', "Output file"},
+ {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
+ {"text", OPT_TEXT, '-', "Print as text"},
+ {"noout", OPT_NOOUT, '-', "No output"},
+ {"verbose", OPT_VERBOSE, '-', "Verbose output"},
+ {"genkey", OPT_GENKEY, '-', "Generate a DSA key"},
+
+ OPT_R_OPTIONS,
+ OPT_PROV_OPTIONS,
+
+ OPT_PARAMETERS(),
+ {"numbits", 0, 0, "Number of bits if generating parameters (optional)"},
+ {NULL}
+};
+
+int dsaparam_main(int argc, char **argv)
+{
+ ENGINE *e = NULL;
+ BIO *out = NULL;
+ EVP_PKEY *params = NULL, *pkey = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ int numbits = -1, num = 0, genkey = 0;
+ int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, noout = 0;
+ int ret = 1, i, text = 0, private = 0;
+ char *infile = NULL, *outfile = NULL, *prog;
+ 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:
+ e = setup_engine(opt_arg(), 0);
+ break;
+ case OPT_TEXT:
+ text = 1;
+ break;
+ case OPT_GENKEY:
+ genkey = 1;
+ break;
+ case OPT_R_CASES:
+ if (!opt_rand(o))
+ goto end;
+ break;
+ case OPT_PROV_CASES:
+ if (!opt_provider(o))
+ goto end;
+ break;
+ case OPT_NOOUT:
+ noout = 1;
+ break;
+ case OPT_VERBOSE:
+ verbose = 1;
+ break;
+ }
+ }
+
+ /* Optional arg is bitsize. */
+ argc = opt_num_rest();
+ argv = opt_rest();
+ if (argc == 1) {
+ if (!opt_int(argv[0], &num) || num < 0)
+ goto opthelp;
+ } else if (!opt_check_rest_arg(NULL)) {
+ goto opthelp;
+ }
+ if (!app_RAND_load())
+ goto end;
+
+ /* generate a key */
+ numbits = num;
+ private = genkey ? 1 : 0;
+
+ out = bio_open_owner(outfile, outformat, private);
+ if (out == NULL)
+ goto end;
+
+ ctx = EVP_PKEY_CTX_new_from_name(NULL, "DSA", NULL);
+ if (ctx == NULL) {
+ BIO_printf(bio_err,
+ "Error, DSA parameter generation context allocation failed\n");
+ goto end;
+ }
+ if (numbits > 0) {
+ if (numbits > OPENSSL_DSA_MAX_MODULUS_BITS)
+ BIO_printf(bio_err,
+ "Warning: It is not recommended to use more than %d bit for DSA keys.\n"
+ " Your key size is %d! Larger key size may behave not as expected.\n",
+ OPENSSL_DSA_MAX_MODULUS_BITS, numbits);
+
+ EVP_PKEY_CTX_set_app_data(ctx, bio_err);
+ if (verbose) {
+ EVP_PKEY_CTX_set_cb(ctx, progress_cb);
+ BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
+ num);
+ BIO_printf(bio_err, "This could take some time\n");
+ }
+ if (EVP_PKEY_paramgen_init(ctx) <= 0) {
+ BIO_printf(bio_err,
+ "Error, DSA key generation paramgen init failed\n");
+ goto end;
+ }
+ if (!EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, num)) {
+ BIO_printf(bio_err,
+ "Error, DSA key generation setting bit length failed\n");
+ goto end;
+ }
+ params = app_paramgen(ctx, "DSA");
+ } else {
+ params = load_keyparams(infile, informat, 1, "DSA", "DSA parameters");
+ }
+ if (params == NULL) {
+ /* Error message should already have been displayed */
+ goto end;
+ }
+
+ if (text) {
+ EVP_PKEY_print_params(out, params, 0, NULL);
+ }
+
+ if (outformat == FORMAT_ASN1 && genkey)
+ noout = 1;
+
+ if (!noout) {
+ if (outformat == FORMAT_ASN1)
+ i = i2d_KeyParams_bio(out, params);
+ else
+ i = PEM_write_bio_Parameters(out, params);
+ if (!i) {
+ BIO_printf(bio_err, "Error, unable to write DSA parameters\n");
+ goto end;
+ }
+ }
+ if (genkey) {
+ EVP_PKEY_CTX_free(ctx);
+ ctx = EVP_PKEY_CTX_new(params, NULL);
+ if (ctx == NULL) {
+ BIO_printf(bio_err,
+ "Error, DSA key generation context allocation failed\n");
+ goto end;
+ }
+ if (EVP_PKEY_keygen_init(ctx) <= 0) {
+ BIO_printf(bio_err,
+ "Error, unable to initialise for key generation\n");
+ goto end;
+ }
+ pkey = app_keygen(ctx, "DSA", numbits, verbose);
+ assert(private);
+ if (outformat == FORMAT_ASN1)
+ i = i2d_PrivateKey_bio(out, pkey);
+ else
+ i = PEM_write_bio_PrivateKey(out, pkey, NULL, NULL, 0, NULL, NULL);
+ }
+ ret = 0;
+ end:
+ if (ret != 0)
+ ERR_print_errors(bio_err);
+ BIO_free_all(out);
+ EVP_PKEY_CTX_free(ctx);
+ EVP_PKEY_free(pkey);
+ EVP_PKEY_free(params);
+ release_engine(e);
+ return ret;
+}