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/* $OpenBSD: genrsa.c,v 1.12 2018/12/09 19:30:34 tobias Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <openssl/opensslconf.h>
/* Until the key-gen callbacks are modified to use newer prototypes, we allow
* deprecated functions for openssl-internal code */
#ifdef OPENSSL_NO_DEPRECATED
#undef OPENSSL_NO_DEPRECATED
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#include <openssl/x509.h>
#define DEFBITS 2048
static int genrsa_cb(int p, int n, BN_GENCB * cb);
int
genrsa_main(int argc, char **argv)
{
BN_GENCB cb;
int ret = 1;
int i, num = DEFBITS;
long l;
const EVP_CIPHER *enc = NULL;
unsigned long f4 = RSA_F4;
char *outfile = NULL;
char *passargout = NULL, *passout = NULL;
BIO *out = NULL;
BIGNUM *bn = BN_new();
RSA *rsa = NULL;
if (single_execution) {
if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
perror("pledge");
exit(1);
}
}
if (!bn)
goto err;
BN_GENCB_set(&cb, genrsa_cb, bio_err);
if ((out = BIO_new(BIO_s_file())) == NULL) {
BIO_printf(bio_err, "unable to create BIO for output\n");
goto err;
}
argv++;
argc--;
for (;;) {
if (argc <= 0)
break;
if (strcmp(*argv, "-out") == 0) {
if (--argc < 1)
goto bad;
outfile = *(++argv);
} else if (strcmp(*argv, "-3") == 0)
f4 = 3;
else if (strcmp(*argv, "-F4") == 0 || strcmp(*argv, "-f4") == 0)
f4 = RSA_F4;
#ifndef OPENSSL_NO_DES
else if (strcmp(*argv, "-des") == 0)
enc = EVP_des_cbc();
else if (strcmp(*argv, "-des3") == 0)
enc = EVP_des_ede3_cbc();
#endif
#ifndef OPENSSL_NO_IDEA
else if (strcmp(*argv, "-idea") == 0)
enc = EVP_idea_cbc();
#endif
#ifndef OPENSSL_NO_AES
else if (strcmp(*argv, "-aes128") == 0)
enc = EVP_aes_128_cbc();
else if (strcmp(*argv, "-aes192") == 0)
enc = EVP_aes_192_cbc();
else if (strcmp(*argv, "-aes256") == 0)
enc = EVP_aes_256_cbc();
#endif
#ifndef OPENSSL_NO_CAMELLIA
else if (strcmp(*argv, "-camellia128") == 0)
enc = EVP_camellia_128_cbc();
else if (strcmp(*argv, "-camellia192") == 0)
enc = EVP_camellia_192_cbc();
else if (strcmp(*argv, "-camellia256") == 0)
enc = EVP_camellia_256_cbc();
#endif
else if (strcmp(*argv, "-passout") == 0) {
if (--argc < 1)
goto bad;
passargout = *(++argv);
} else
break;
argv++;
argc--;
}
if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
bad:
BIO_printf(bio_err, "usage: genrsa [args] [numbits]\n");
#ifndef OPENSSL_NO_DES
BIO_printf(bio_err, " -des encrypt the generated key with DES in cbc mode\n");
BIO_printf(bio_err, " -des3 encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
#endif
#ifndef OPENSSL_NO_IDEA
BIO_printf(bio_err, " -idea encrypt the generated key with IDEA in cbc mode\n");
#endif
#ifndef OPENSSL_NO_AES
BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
BIO_printf(bio_err, " encrypt PEM output with cbc aes\n");
#endif
#ifndef OPENSSL_NO_CAMELLIA
BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
BIO_printf(bio_err, " encrypt PEM output with cbc camellia\n");
#endif
BIO_printf(bio_err, " -out file output the key to 'file\n");
BIO_printf(bio_err, " -passout arg output file pass phrase source\n");
BIO_printf(bio_err, " -f4 use F4 (0x10001) for the E value\n");
BIO_printf(bio_err, " -3 use 3 for the E value\n");
goto err;
}
if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
BIO_printf(bio_err, "Error getting password\n");
goto err;
}
if (outfile == NULL) {
BIO_set_fp(out, stdout, BIO_NOCLOSE);
} else {
if (BIO_write_filename(out, outfile) <= 0) {
perror(outfile);
goto err;
}
}
BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
num);
rsa = RSA_new();
if (!rsa)
goto err;
if (!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
goto err;
/*
* We need to do the following for when the base number size is <
* long, esp windows 3.1 :-(.
*/
l = 0L;
for (i = 0; i < rsa->e->top; i++) {
#ifndef _LP64
l <<= BN_BITS4;
l <<= BN_BITS4;
#endif
l += rsa->e->d[i];
}
BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l);
{
PW_CB_DATA cb_data;
cb_data.password = passout;
cb_data.prompt_info = outfile;
if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
password_callback, &cb_data))
goto err;
}
ret = 0;
err:
BN_free(bn);
RSA_free(rsa);
BIO_free_all(out);
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(cb->arg, &c, 1);
(void) BIO_flush(cb->arg);
return 1;
}
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