2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* We need to use some deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
13 #include <openssl/opensslconf.h>
15 NON_EMPTY_TRANSLATION_UNIT
20 # include <sys/types.h>
21 # include <sys/stat.h>
24 # include <openssl/bio.h>
25 # include <openssl/err.h>
26 # include <openssl/bn.h>
27 # include <openssl/dsa.h>
28 # include <openssl/x509.h>
29 # include <openssl/pem.h>
31 typedef enum OPTION_choice
{
32 OPT_ERR
= -1, OPT_EOF
= 0, OPT_HELP
,
33 OPT_OUT
, OPT_PASSOUT
, OPT_ENGINE
, OPT_CIPHER
, OPT_VERBOSE
,
34 OPT_R_ENUM
, OPT_PROV_ENUM
37 const OPTIONS gendsa_options
[] = {
38 {OPT_HELP_STR
, 1, '-', "Usage: %s [options] dsaparam-file\n"},
40 OPT_SECTION("General"),
41 {"help", OPT_HELP
, '-', "Display this summary"},
42 # ifndef OPENSSL_NO_ENGINE
43 {"engine", OPT_ENGINE
, 's', "Use engine, possibly a hardware device"},
46 OPT_SECTION("Output"),
47 {"out", OPT_OUT
, '>', "Output the key to the specified file"},
48 {"passout", OPT_PASSOUT
, 's', "Output file pass phrase source"},
51 {"", OPT_CIPHER
, '-', "Encrypt the output with any supported cipher"},
52 {"verbose", OPT_VERBOSE
, '-', "Verbose output"},
55 {"dsaparam-file", 0, 0, "File containing DSA parameters"},
59 int gendsa_main(int argc
, char **argv
)
62 BIO
*out
= NULL
, *in
= NULL
;
64 const EVP_CIPHER
*enc
= NULL
;
65 char *dsaparams
= NULL
;
66 char *outfile
= NULL
, *passoutarg
= NULL
, *passout
= NULL
, *prog
;
68 int ret
= 1, private = 0, verbose
= 0;
69 const BIGNUM
*p
= NULL
;
71 prog
= opt_init(argc
, argv
, gendsa_options
);
72 while ((o
= opt_next()) != OPT_EOF
) {
77 BIO_printf(bio_err
, "%s: Use -help for summary.\n", prog
);
81 opt_help(gendsa_options
);
87 passoutarg
= opt_arg();
90 e
= setup_engine(opt_arg(), 0);
101 if (!opt_cipher(opt_unknown(), &enc
))
109 argc
= opt_num_rest();
117 if (!app_passwd(NULL
, passoutarg
, NULL
, &passout
)) {
118 BIO_printf(bio_err
, "Error getting password\n");
122 in
= bio_open_default(dsaparams
, 'r', FORMAT_PEM
);
126 if ((dsa
= PEM_read_bio_DSAparams(in
, NULL
, NULL
, NULL
)) == NULL
) {
127 BIO_printf(bio_err
, "unable to load DSA parameter file\n");
133 out
= bio_open_owner(outfile
, FORMAT_PEM
, private);
137 DSA_get0_pqg(dsa
, &p
, NULL
, NULL
);
139 if (BN_num_bits(p
) > OPENSSL_DSA_MAX_MODULUS_BITS
)
141 "Warning: It is not recommended to use more than %d bit for DSA keys.\n"
142 " Your key size is %d! Larger key size may behave not as expected.\n",
143 OPENSSL_DSA_MAX_MODULUS_BITS
, BN_num_bits(p
));
146 BIO_printf(bio_err
, "Generating DSA key, %d bits\n", BN_num_bits(p
));
147 if (!DSA_generate_key(dsa
))
151 if (!PEM_write_bio_DSAPrivateKey(out
, dsa
, enc
, NULL
, 0, NULL
, passout
))
156 ERR_print_errors(bio_err
);
162 OPENSSL_free(passout
);