File: [local] / src / usr.bin / openssl / genrsa.c (download)
Revision 1.19, Fri Jan 14 09:25:42 2022 UTC (2 years, 4 months ago) by tb
Branch: MAIN
CVS Tags: OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1 Changes since 1.18: +3 -5 lines
openssl(1) genrsa: simplify access to rsa->e
ok inoguchi jsing
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/* $OpenBSD: genrsa.c,v 1.19 2022/01/14 09:25:42 tb 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);
static struct {
const EVP_CIPHER *enc;
unsigned long f4;
char *outfile;
char *passargout;
} genrsa_config;
static int
set_public_exponent(int argc, char **argv, int *argsused)
{
char *option = argv[0];
if (strcmp(option, "-3") == 0)
genrsa_config.f4 = 3;
else if (strcmp(option, "-f4") == 0 || strcmp(option, "-F4") == 0)
genrsa_config.f4 = RSA_F4;
else
return (1);
*argsused = 1;
return (0);
}
static const EVP_CIPHER *get_cipher_by_name(char *name)
{
if (name == NULL || strcmp(name, "") == 0)
return (NULL);
#ifndef OPENSSL_NO_AES
else if (strcmp(name, "aes128") == 0)
return EVP_aes_128_cbc();
else if (strcmp(name, "aes192") == 0)
return EVP_aes_192_cbc();
else if (strcmp(name, "aes256") == 0)
return EVP_aes_256_cbc();
#endif
#ifndef OPENSSL_NO_CAMELLIA
else if (strcmp(name, "camellia128") == 0)
return EVP_camellia_128_cbc();
else if (strcmp(name, "camellia192") == 0)
return EVP_camellia_192_cbc();
else if (strcmp(name, "camellia256") == 0)
return EVP_camellia_256_cbc();
#endif
#ifndef OPENSSL_NO_DES
else if (strcmp(name, "des") == 0)
return EVP_des_cbc();
else if (strcmp(name, "des3") == 0)
return EVP_des_ede3_cbc();
#endif
#ifndef OPENSSL_NO_IDEA
else if (strcmp(name, "idea") == 0)
return EVP_idea_cbc();
#endif
else
return (NULL);
}
static int
set_enc(int argc, char **argv, int *argsused)
{
char *name = argv[0];
if (*name++ != '-')
return (1);
if ((genrsa_config.enc = get_cipher_by_name(name)) == NULL)
return (1);
*argsused = 1;
return (0);
}
static const struct option genrsa_options[] = {
{
.name = "3",
.desc = "Use 3 for the E value",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_public_exponent,
},
{
.name = "f4",
.desc = "Use F4 (0x10001) for the E value",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_public_exponent,
},
{
.name = "F4",
.desc = "Use F4 (0x10001) for the E value",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_public_exponent,
},
#ifndef OPENSSL_NO_AES
{
.name = "aes128",
.desc = "Encrypt PEM output with CBC AES",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
{
.name = "aes192",
.desc = "Encrypt PEM output with CBC AES",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
{
.name = "aes256",
.desc = "Encrypt PEM output with CBC AES",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
#endif
#ifndef OPENSSL_NO_CAMELLIA
{
.name = "camellia128",
.desc = "Encrypt PEM output with CBC Camellia",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
{
.name = "camellia192",
.desc = "Encrypt PEM output with CBC Camellia",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
{
.name = "camellia256",
.desc = "Encrypt PEM output with CBC Camellia",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
#endif
#ifndef OPENSSL_NO_DES
{
.name = "des",
.desc = "Encrypt the generated key with DES in CBC mode",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
{
.name = "des3",
.desc = "Encrypt the generated key with DES in EDE CBC mode (168 bit key)",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
#endif
#ifndef OPENSSL_NO_IDEA
{
.name = "idea",
.desc = "Encrypt the generated key with IDEA in CBC mode",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = set_enc,
},
#endif
{
.name = "out",
.argname = "file",
.desc = "Output the key to 'file'",
.type = OPTION_ARG,
.opt.arg = &genrsa_config.outfile,
},
{
.name = "passout",
.argname = "arg",
.desc = "Output file passphrase source",
.type = OPTION_ARG,
.opt.arg = &genrsa_config.passargout,
},
{ NULL },
};
static void
genrsa_usage(void)
{
fprintf(stderr, "usage: genrsa [-3 | -f4] [-aes128 | -aes192 |");
fprintf(stderr, " -aes256 |\n");
fprintf(stderr, " -camellia128 | -camellia192 | -camellia256 |");
fprintf(stderr, " -des | -des3 | -idea]\n");
fprintf(stderr, " [-out file] [-passout arg] [numbits]\n\n");
options_usage(genrsa_options);
fprintf(stderr, "\n");
}
int
genrsa_main(int argc, char **argv)
{
BN_GENCB *cb = NULL;
int ret = 1;
int num = DEFBITS;
char *numbits = NULL;
char *passout = NULL;
BIO *out = NULL;
BIGNUM *bn = NULL;
RSA *rsa = NULL;
char *rsa_e_hex = NULL, *rsa_e_dec = NULL;
if (single_execution) {
if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
perror("pledge");
exit(1);
}
}
if ((bn = BN_new()) == NULL)
goto err;
if ((cb = BN_GENCB_new()) == NULL) {
BIO_printf(bio_err, "Error allocating BN_GENCB object\n");
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;
}
memset(&genrsa_config, 0, sizeof(genrsa_config));
genrsa_config.f4 = RSA_F4;
if (options_parse(argc, argv, genrsa_options, &numbits, NULL) != 0) {
genrsa_usage();
goto err;
}
if ((numbits != NULL) &&
((sscanf(numbits, "%d", &num) == 0) || (num < 0))) {
genrsa_usage();
goto err;
}
if (!app_passwd(bio_err, NULL, genrsa_config.passargout, NULL,
&passout)) {
BIO_printf(bio_err, "Error getting password\n");
goto err;
}
if (genrsa_config.outfile == NULL) {
BIO_set_fp(out, stdout, BIO_NOCLOSE);
} else {
if (BIO_write_filename(out, genrsa_config.outfile) <= 0) {
perror(genrsa_config.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, genrsa_config.f4) ||
!RSA_generate_key_ex(rsa, num, bn, cb))
goto err;
if ((rsa_e_hex = BN_bn2hex(RSA_get0_e(rsa))) == NULL)
goto err;
if ((rsa_e_dec = BN_bn2dec(RSA_get0_e(rsa))) == NULL)
goto err;
BIO_printf(bio_err, "e is %s (0x%s)\n", rsa_e_hex, rsa_e_dec);
{
PW_CB_DATA cb_data;
cb_data.password = passout;
cb_data.prompt_info = genrsa_config.outfile;
if (!PEM_write_bio_RSAPrivateKey(out, rsa, genrsa_config.enc,
NULL, 0, password_callback, &cb_data))
goto err;
}
ret = 0;
err:
BN_free(bn);
BN_GENCB_free(cb);
RSA_free(rsa);
BIO_free_all(out);
free(rsa_e_dec);
free(rsa_e_hex);
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;
}