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
|
/* $Id: key.c,v 1.3 2021/11/18 17:26:43 tb Exp $ */
/*
* Copyright (c) 2019 Renaud Allard <renaud@allard.it>
* Copyright (c) 2016 Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <stdlib.h>
#include <unistd.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#include <openssl/ecdsa.h>
#include <openssl/ec.h>
#include <openssl/obj_mac.h>
#include "key.h"
/*
* Default number of bits when creating a new RSA key.
*/
#define KBITS 4096
#define ECCTYPE NID_secp384r1
/*
* Create an RSA key with the default KBITS number of bits.
*/
EVP_PKEY *
rsa_key_create(FILE *f, const char *fname)
{
EVP_PKEY_CTX *ctx = NULL;
EVP_PKEY *pkey = NULL;
/* First, create the context and the key. */
if ((ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_RSA, NULL)) == NULL) {
warnx("EVP_PKEY_CTX_new_id");
goto err;
} else if (EVP_PKEY_keygen_init(ctx) <= 0) {
warnx("EVP_PKEY_keygen_init");
goto err;
} else if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, KBITS) <= 0) {
warnx("EVP_PKEY_set_rsa_keygen_bits");
goto err;
} else if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
warnx("EVP_PKEY_keygen");
goto err;
}
/* Serialise the key to the disc. */
if (PEM_write_PrivateKey(f, pkey, NULL, NULL, 0, NULL, NULL))
goto out;
warnx("%s: PEM_write_PrivateKey", fname);
err:
EVP_PKEY_free(pkey);
pkey = NULL;
out:
EVP_PKEY_CTX_free(ctx);
return pkey;
}
EVP_PKEY *
ec_key_create(FILE *f, const char *fname)
{
EC_KEY *eckey = NULL;
EVP_PKEY *pkey = NULL;
if ((eckey = EC_KEY_new_by_curve_name(ECCTYPE)) == NULL ) {
warnx("EC_KEY_new_by_curve_name");
goto err;
}
if (!EC_KEY_generate_key(eckey)) {
warnx("EC_KEY_generate_key");
goto err;
}
/* set OPENSSL_EC_NAMED_CURVE to be able to load the key */
EC_KEY_set_asn1_flag(eckey, OPENSSL_EC_NAMED_CURVE);
/* Serialise the key to the disc in EC format */
if (!PEM_write_ECPrivateKey(f, eckey, NULL, NULL, 0, NULL, NULL)) {
warnx("PEM_write_ECPrivateKey");
goto err;
}
/* Convert the EC key into a PKEY structure */
if ((pkey=EVP_PKEY_new()) == NULL) {
warnx("EVP_PKEY_new");
goto err;
}
if (!EVP_PKEY_set1_EC_KEY(pkey, eckey)) {
warnx("EVP_PKEY_assign_EC_KEY");
goto err;
}
warnx("%s: PEM_write_ECPrivateKey", fname);
goto out;
err:
EC_KEY_free(eckey);
EVP_PKEY_free(pkey);
pkey = NULL;
out:
return pkey;
}
EVP_PKEY *
key_load(FILE *f, const char *fname)
{
EVP_PKEY *pkey;
pkey = PEM_read_PrivateKey(f, NULL, NULL, NULL);
if (pkey == NULL) {
warnx("%s: PEM_read_PrivateKey", fname);
return NULL;
}
if (EVP_PKEY_base_id(pkey) == EVP_PKEY_RSA ||
EVP_PKEY_base_id(pkey) == EVP_PKEY_EC)
return pkey;
warnx("%s: unsupported key type", fname);
EVP_PKEY_free(pkey);
return NULL;
}
|
