297 lines
8.0 KiB
C
297 lines
8.0 KiB
C
/* $OpenBSD: gendsa.c,v 1.17 2023/03/06 14:32:06 tb Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <string.h>
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#include "apps.h"
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#include <openssl/bio.h>
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#include <openssl/bn.h>
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#include <openssl/dsa.h>
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#include <openssl/err.h>
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#include <openssl/pem.h>
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#include <openssl/x509.h>
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static struct {
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const EVP_CIPHER *enc;
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char *outfile;
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char *passargout;
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} cfg;
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static const EVP_CIPHER *get_cipher_by_name(char *name)
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{
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if (name == NULL || strcmp(name, "") == 0)
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return (NULL);
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#ifndef OPENSSL_NO_AES
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else if (strcmp(name, "aes128") == 0)
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return EVP_aes_128_cbc();
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else if (strcmp(name, "aes192") == 0)
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return EVP_aes_192_cbc();
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else if (strcmp(name, "aes256") == 0)
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return EVP_aes_256_cbc();
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#endif
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#ifndef OPENSSL_NO_CAMELLIA
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else if (strcmp(name, "camellia128") == 0)
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return EVP_camellia_128_cbc();
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else if (strcmp(name, "camellia192") == 0)
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return EVP_camellia_192_cbc();
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else if (strcmp(name, "camellia256") == 0)
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return EVP_camellia_256_cbc();
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#endif
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#ifndef OPENSSL_NO_DES
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else if (strcmp(name, "des") == 0)
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return EVP_des_cbc();
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else if (strcmp(name, "des3") == 0)
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return EVP_des_ede3_cbc();
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#endif
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#ifndef OPENSSL_NO_IDEA
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else if (strcmp(name, "idea") == 0)
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return EVP_idea_cbc();
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#endif
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else
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return (NULL);
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}
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static int
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set_enc(int argc, char **argv, int *argsused)
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{
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char *name = argv[0];
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if (*name++ != '-')
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return (1);
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if ((cfg.enc = get_cipher_by_name(name)) == NULL)
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return (1);
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*argsused = 1;
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return (0);
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}
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static const struct option gendsa_options[] = {
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#ifndef OPENSSL_NO_AES
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{
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.name = "aes128",
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.desc = "Encrypt PEM output with CBC AES",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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{
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.name = "aes192",
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.desc = "Encrypt PEM output with CBC AES",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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{
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.name = "aes256",
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.desc = "Encrypt PEM output with CBC AES",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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#endif
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#ifndef OPENSSL_NO_CAMELLIA
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{
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.name = "camellia128",
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.desc = "Encrypt PEM output with CBC Camellia",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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{
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.name = "camellia192",
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.desc = "Encrypt PEM output with CBC Camellia",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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{
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.name = "camellia256",
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.desc = "Encrypt PEM output with CBC Camellia",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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#endif
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#ifndef OPENSSL_NO_DES
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{
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.name = "des",
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.desc = "Encrypt the generated key with DES in CBC mode",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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{
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.name = "des3",
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.desc = "Encrypt the generated key with DES in EDE CBC mode (168 bit key)",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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#endif
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#ifndef OPENSSL_NO_IDEA
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{
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.name = "idea",
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.desc = "Encrypt the generated key with IDEA in CBC mode",
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.type = OPTION_ARGV_FUNC,
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.opt.argvfunc = set_enc,
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},
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#endif
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{
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.name = "out",
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.argname = "file",
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.desc = "Output the key to 'file'",
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.type = OPTION_ARG,
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.opt.arg = &cfg.outfile,
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},
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{
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.name = "passout",
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.argname = "src",
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.desc = "Output file passphrase source",
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.type = OPTION_ARG,
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.opt.arg = &cfg.passargout,
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},
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{ NULL },
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};
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static void
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gendsa_usage(void)
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{
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fprintf(stderr, "usage: gendsa [-aes128 | -aes192 | -aes256 |\n");
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fprintf(stderr, " -camellia128 | -camellia192 | -camellia256 |\n");
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fprintf(stderr, " -des | -des3 | -idea] [-out file] [-passout src]");
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fprintf(stderr, " paramfile\n\n");
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options_usage(gendsa_options);
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fprintf(stderr, "\n");
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}
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int
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gendsa_main(int argc, char **argv)
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{
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DSA *dsa = NULL;
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int ret = 1;
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char *dsaparams = NULL;
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char *passout = NULL;
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BIO *out = NULL, *in = NULL;
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if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
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perror("pledge");
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exit(1);
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}
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memset(&cfg, 0, sizeof(cfg));
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if (options_parse(argc, argv, gendsa_options, &dsaparams, NULL) != 0) {
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gendsa_usage();
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goto end;
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}
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if (dsaparams == NULL) {
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gendsa_usage();
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goto end;
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}
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if (!app_passwd(bio_err, NULL, cfg.passargout, NULL,
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&passout)) {
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BIO_printf(bio_err, "Error getting password\n");
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goto end;
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}
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in = BIO_new(BIO_s_file());
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if (!(BIO_read_filename(in, dsaparams))) {
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perror(dsaparams);
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goto end;
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}
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if ((dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL)) == NULL) {
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BIO_printf(bio_err, "unable to load DSA parameter file\n");
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goto end;
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}
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BIO_free(in);
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in = NULL;
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out = BIO_new(BIO_s_file());
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if (out == NULL)
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goto end;
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if (cfg.outfile == NULL) {
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BIO_set_fp(out, stdout, BIO_NOCLOSE);
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} else {
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if (BIO_write_filename(out, cfg.outfile) <= 0) {
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perror(cfg.outfile);
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goto end;
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}
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}
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BIO_printf(bio_err, "Generating DSA key, %d bits\n",
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BN_num_bits(DSA_get0_p(dsa)));
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if (!DSA_generate_key(dsa))
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goto end;
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if (!PEM_write_bio_DSAPrivateKey(out, dsa, cfg.enc, NULL, 0,
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NULL, passout))
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goto end;
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ret = 0;
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end:
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if (ret != 0)
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ERR_print_errors(bio_err);
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BIO_free(in);
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BIO_free_all(out);
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DSA_free(dsa);
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free(passout);
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return (ret);
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}
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