1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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
*/
/* We need to use some deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED
#include <openssl/opensslconf.h>
#ifdef OPENSSL_NO_DSA
NON_EMPTY_TRANSLATION_UNIT
#else
# include <stdio.h>
# include <string.h>
# include <sys/types.h>
# include <sys/stat.h>
# include "apps.h"
# include "progs.h"
# include <openssl/bio.h>
# include <openssl/err.h>
# include <openssl/bn.h>
# include <openssl/dsa.h>
# include <openssl/x509.h>
# include <openssl/pem.h>
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_OUT, OPT_PASSOUT, OPT_ENGINE, OPT_CIPHER, OPT_VERBOSE,
OPT_R_ENUM, OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS gendsa_options[] = {
{OPT_HELP_STR, 1, '-', "Usage: %s [options] dsaparam-file\n"},
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
# ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
# endif
OPT_SECTION("Output"),
{"out", OPT_OUT, '>', "Output the key to the specified file"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
OPT_R_OPTIONS,
OPT_PROV_OPTIONS,
{"", OPT_CIPHER, '-', "Encrypt the output with any supported cipher"},
{"verbose", OPT_VERBOSE, '-', "Verbose output"},
OPT_PARAMETERS(),
{"dsaparam-file", 0, 0, "File containing DSA parameters"},
{NULL}
};
int gendsa_main(int argc, char **argv)
{
ENGINE *e = NULL;
BIO *out = NULL, *in = NULL;
DSA *dsa = NULL;
const EVP_CIPHER *enc = NULL;
char *dsaparams = NULL;
char *outfile = NULL, *passoutarg = NULL, *passout = NULL, *prog;
OPTION_CHOICE o;
int ret = 1, private = 0, verbose = 0;
const BIGNUM *p = NULL;
prog = opt_init(argc, argv, gendsa_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
ret = 0;
opt_help(gendsa_options);
goto end;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_PASSOUT:
passoutarg = opt_arg();
break;
case OPT_ENGINE:
e = setup_engine(opt_arg(), 0);
break;
case OPT_R_CASES:
if (!opt_rand(o))
goto end;
break;
case OPT_PROV_CASES:
if (!opt_provider(o))
goto end;
break;
case OPT_CIPHER:
if (!opt_cipher(opt_unknown(), &enc))
goto end;
break;
case OPT_VERBOSE:
verbose = 1;
break;
}
}
argc = opt_num_rest();
argv = opt_rest();
private = 1;
if (argc != 1)
goto opthelp;
dsaparams = *argv;
if (!app_passwd(NULL, passoutarg, NULL, &passout)) {
BIO_printf(bio_err, "Error getting password\n");
goto end;
}
in = bio_open_default(dsaparams, 'r', FORMAT_PEM);
if (in == NULL)
goto end2;
if ((dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL)) == NULL) {
BIO_printf(bio_err, "unable to load DSA parameter file\n");
goto end;
}
BIO_free(in);
in = NULL;
out = bio_open_owner(outfile, FORMAT_PEM, private);
if (out == NULL)
goto end2;
DSA_get0_pqg(dsa, &p, NULL, NULL);
if (BN_num_bits(p) > OPENSSL_DSA_MAX_MODULUS_BITS)
BIO_printf(bio_err,
"Warning: It is not recommended to use more than %d bit for DSA keys.\n"
" Your key size is %d! Larger key size may behave not as expected.\n",
OPENSSL_DSA_MAX_MODULUS_BITS, BN_num_bits(p));
if (verbose)
BIO_printf(bio_err, "Generating DSA key, %d bits\n", BN_num_bits(p));
if (!DSA_generate_key(dsa))
goto end;
assert(private);
if (!PEM_write_bio_DSAPrivateKey(out, dsa, enc, NULL, 0, NULL, passout))
goto end;
ret = 0;
end:
if (ret != 0)
ERR_print_errors(bio_err);
end2:
BIO_free(in);
BIO_free_all(out);
DSA_free(dsa);
release_engine(e);
OPENSSL_free(passout);
return ret;
}
#endif
|
