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/*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/opensslconf.h>
#ifdef OPENSSL_NO_RSA
NON_EMPTY_TRANSLATION_UNIT
#else
# include <stdio.h>
# include <string.h>
# include <sys/types.h>
# include <sys/stat.h>
# include "apps.h"
# include <openssl/bio.h>
# include <openssl/err.h>
# include <openssl/bn.h>
# include <openssl/rsa.h>
# include <openssl/evp.h>
# include <openssl/x509.h>
# include <openssl/pem.h>
# include <openssl/rand.h>
# define DEFBITS 2048
static int genrsa_cb(int p, int n, BN_GENCB *cb);
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_3, OPT_F4, OPT_ENGINE,
OPT_OUT, OPT_RAND, OPT_PASSOUT, OPT_CIPHER
} OPTION_CHOICE;
OPTIONS genrsa_options[] = {
{"help", OPT_HELP, '-', "Display this summary"},
{"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"},
{"out", OPT_OUT, 's', "Output the key to specified file"},
{"rand", OPT_RAND, 's',
"Load the file(s) into the random number generator"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
{"", OPT_CIPHER, '-', "Encrypt the output with any supported cipher"},
# ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
# endif
{NULL}
};
int genrsa_main(int argc, char **argv)
{
BN_GENCB *cb = BN_GENCB_new();
PW_CB_DATA cb_data;
ENGINE *eng = NULL;
BIGNUM *bn = BN_new();
BIO *out = NULL;
BIGNUM *e;
RSA *rsa = NULL;
const EVP_CIPHER *enc = NULL;
int ret = 1, num = DEFBITS, private = 0;
unsigned long f4 = RSA_F4;
char *outfile = NULL, *passoutarg = NULL, *passout = NULL;
char *inrand = NULL, *prog, *hexe, *dece;
OPTION_CHOICE o;
if (bn == NULL || cb == NULL)
goto end;
BN_GENCB_set(cb, genrsa_cb, bio_err);
prog = opt_init(argc, argv, genrsa_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
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 = 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_RAND:
inrand = opt_arg();
break;
case OPT_PASSOUT:
passoutarg = opt_arg();
break;
case OPT_CIPHER:
if (!opt_cipher(opt_unknown(), &enc))
goto end;
break;
}
}
argc = opt_num_rest();
argv = opt_rest();
private = 1;
if (argv[0] && (!opt_int(argv[0], &num) || num <= 0))
goto end;
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 (!app_RAND_load_file(NULL, 1) && inrand == NULL
&& !RAND_status()) {
BIO_printf(bio_err,
"warning, not much extra random data, consider using the -rand option\n");
}
if (inrand != NULL)
BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
app_RAND_load_files(inrand));
BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
num);
rsa = eng ? RSA_new_method(eng) : RSA_new();
if (rsa == NULL)
goto end;
if (!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, cb))
goto end;
app_RAND_write_file(NULL);
RSA_get0_key(rsa, NULL, &e, NULL);
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);
cb_data.password = passout;
cb_data.prompt_info = outfile;
assert(private);
if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
(pem_password_cb *)password_callback,
&cb_data))
goto end;
ret = 0;
end:
BN_free(bn);
BN_GENCB_free(cb);
RSA_free(rsa);
BIO_free_all(out);
OPENSSL_free(passout);
if (ret != 0)
ERR_print_errors(bio_err);
return (ret);
}
static int genrsa_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));
return 1;
}
#endif
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