+ OPT_SECTION("Input"),
+ {"3", OPT_3, '-', "Use 3 for the E value"},
+ {"F4", OPT_F4, '-', "Use F4 (0x10001) for the E value"},
+ {"f4", OPT_F4, '-', "Use F4 (0x10001) for the E value"},
+
+ OPT_SECTION("Output"),
+ {"out", OPT_OUT, '>', "Output the key to specified file"},
+ {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
+ {"primes", OPT_PRIMES, 'p', "Specify number of primes"},
+ {"verbose", OPT_VERBOSE, '-', "Verbose output"},
+ {"", OPT_CIPHER, '-', "Encrypt the output with any supported cipher"},
+
+ OPT_R_OPTIONS,
+ OPT_PROV_OPTIONS,
+
+ OPT_PARAMETERS(),
+ {"numbits", 0, 0, "Size of key in bits"},
+ {NULL}
+};
+
+int genrsa_main(int argc, char **argv)
+{
+ BN_GENCB *cb = BN_GENCB_new();
+ ENGINE *eng = NULL;
+ BIGNUM *bn = BN_new();
+ RSA *rsa;
+ BIO *out = NULL;
+ const BIGNUM *e;
+ EVP_PKEY *pkey = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ const EVP_CIPHER *enc = NULL;
+ int ret = 1, num = DEFBITS, private = 0, primes = DEFPRIMES;
+ unsigned long f4 = RSA_F4;
+ char *outfile = NULL, *passoutarg = NULL, *passout = NULL;
+ char *prog, *hexe, *dece;
+ OPTION_CHOICE o;
+ unsigned char *ebuf = NULL;
+
+ if (bn == NULL || cb == NULL)
+ goto end;
+
+ prog = opt_init(argc, argv, genrsa_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:
+ ret = 0;
+ opt_help(genrsa_options);
+ goto end;
+ case OPT_3:
+ f4 = RSA_3;
+ break;
+ case OPT_F4:
+ f4 = RSA_F4;
+ break;
+ case OPT_OUT:
+ outfile = opt_arg();
+ break;
+ case OPT_ENGINE:
+ eng = setup_engine(opt_arg(), 0);
+ 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_PASSOUT:
+ passoutarg = opt_arg();
+ break;
+ case OPT_CIPHER:
+ if (!opt_cipher(opt_unknown(), &enc))
+ goto end;
+ break;
+ case OPT_PRIMES:
+ if (!opt_int(opt_arg(), &primes))
+ goto end;
+ break;
+ case OPT_VERBOSE:
+ verbose = 1;
+ break;
+ }
+ }
+ argc = opt_num_rest();
+ argv = opt_rest();
+
+ if (argc == 1) {
+ if (!opt_int(argv[0], &num) || num <= 0)
+ goto end;
+ if (num > OPENSSL_RSA_MAX_MODULUS_BITS)
+ BIO_printf(bio_err,
+ "Warning: It is not recommended to use more than %d bit for RSA keys.\n"
+ " Your key size is %d! Larger key size may behave not as expected.\n",
+ OPENSSL_RSA_MAX_MODULUS_BITS, num);
+ } else if (argc > 0) {
+ BIO_printf(bio_err, "Extra arguments given.\n");
+ goto opthelp;
+ }
+
+ private = 1;
+ if (!app_passwd(NULL, passoutarg, NULL, &passout)) {
+ BIO_printf(bio_err, "Error getting password\n");
+ goto end;
+ }
+
+ out = bio_open_owner(outfile, FORMAT_PEM, private);
+ if (out == NULL)
+ goto end;
+
+ if (!init_gen_str(&ctx, "RSA", eng, 0))
+ goto end;
+
+ EVP_PKEY_CTX_set_cb(ctx, genrsa_cb);
+ EVP_PKEY_CTX_set_app_data(ctx, bio_err);
+
+ if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, num) <= 0) {
+ BIO_printf(bio_err, "Error setting RSA length\n");
+ goto end;
+ }
+ if (!BN_set_word(bn, f4)) {
+ BIO_printf(bio_err, "Error allocating RSA public exponent\n");
+ goto end;
+ }
+ if (EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, bn) <= 0) {
+ BIO_printf(bio_err, "Error setting RSA public exponent\n");
+ goto end;
+ }
+ if (EVP_PKEY_CTX_set_rsa_keygen_primes(ctx, primes) <= 0) {
+ BIO_printf(bio_err, "Error setting number of primes\n");
+ goto end;
+ }
+ if (verbose)
+ BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus (%d primes)\n",
+ num, primes);
+ if (!EVP_PKEY_keygen(ctx, &pkey)) {
+ BIO_printf(bio_err, "Error generating RSA key\n");
+ goto end;
+ }
+
+ if (verbose) {
+ if ((rsa = EVP_PKEY_get0_RSA(pkey)) != NULL) {
+ RSA_get0_key(rsa, NULL, &e, NULL);
+ } else {
+ BIO_printf(bio_err, "Error cannot access RSA e\n");
+ goto end;
+ }
+ hexe = BN_bn2hex(e);
+ dece = BN_bn2dec(e);
+ if (hexe && dece) {
+ BIO_printf(bio_err, "e is %s (0x%s)\n", dece, hexe);
+ }
+ OPENSSL_free(hexe);
+ OPENSSL_free(dece);
+ }
+ if (!PEM_write_bio_PrivateKey(out, pkey, enc, NULL, 0, NULL, passout))
+ goto end;
+
+ ret = 0;
+ end:
+ BN_free(bn);
+ BN_GENCB_free(cb);
+ EVP_PKEY_CTX_free(ctx);
+ EVP_PKEY_free(pkey);
+ BIO_free_all(out);
+ release_engine(eng);
+ OPENSSL_free(passout);
+ OPENSSL_free(ebuf);
+ if (ret != 0)
+ ERR_print_errors(bio_err);
+ return ret;
+}
+
+static int genrsa_cb(EVP_PKEY_CTX *ctx)
+{
+ char c = '*';
+ BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
+ int p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
+
+ if (!verbose)
+ return 1;
+
+ if (p == 0)
+ c = '.';
+ if (p == 1)
+ c = '+';
+ if (p == 2)
+ c = '*';
+ if (p == 3)
+ c = '\n';
+ BIO_write(b, &c, 1);
+ (void)BIO_flush(b);
+ return 1;
+}