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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/* $OpenBSD: tls_util.c,v 1.12 2018/02/08 07:55:29 jsing Exp $ */
/*
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
* Copyright (c) 2014 Ted Unangst <tedu@openbsd.org>
* Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org>
*
* 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 AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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 <sys/stat.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "tls.h"
#include "tls_internal.h"
static void *
memdup(const void *in, size_t len)
{
void *out;
if ((out = malloc(len)) == NULL)
return NULL;
memcpy(out, in, len);
return out;
}
int
tls_set_mem(char **dest, size_t *destlen, const void *src, size_t srclen)
{
free(*dest);
*dest = NULL;
*destlen = 0;
if (src != NULL)
if ((*dest = memdup(src, srclen)) == NULL)
return -1;
*destlen = srclen;
return 0;
}
int
tls_set_string(const char **dest, const char *src)
{
free((char *)*dest);
*dest = NULL;
if (src != NULL)
if ((*dest = strdup(src)) == NULL)
return -1;
return 0;
}
/*
* Extract the host and port from a colon separated value. For a literal IPv6
* address the address must be contained with square braces. If a host and
* port are successfully extracted, the function will return 0 and the
* caller is responsible for freeing the host and port. If no port is found
* then the function will return 1, with both host and port being NULL.
* On memory allocation failure -1 will be returned.
*/
int
tls_host_port(const char *hostport, char **host, char **port)
{
char *h, *p, *s;
int rv = 1;
*host = NULL;
*port = NULL;
if ((s = strdup(hostport)) == NULL)
goto err;
h = p = s;
/* See if this is an IPv6 literal with square braces. */
if (p[0] == '[') {
h++;
if ((p = strchr(s, ']')) == NULL)
goto done;
*p++ = '\0';
}
/* Find the port seperator. */
if ((p = strchr(p, ':')) == NULL)
goto done;
/* If there is another separator then we have issues. */
if (strchr(p + 1, ':') != NULL)
goto done;
*p++ = '\0';
if (asprintf(host, "%s", h) == -1)
goto err;
if (asprintf(port, "%s", p) == -1)
goto err;
rv = 0;
goto done;
err:
free(*host);
*host = NULL;
free(*port);
*port = NULL;
rv = -1;
done:
free(s);
return (rv);
}
int
tls_password_cb(char *buf, int size, int rwflag, void *u)
{
size_t len;
if (size < 0)
return (0);
if (u == NULL) {
memset(buf, 0, size);
return (0);
}
if ((len = strlcpy(buf, u, size)) >= (size_t)size)
return (0);
return (len);
}
uint8_t *
tls_load_file(const char *name, size_t *len, char *password)
{
FILE *fp;
EVP_PKEY *key = NULL;
BIO *bio = NULL;
char *data;
uint8_t *buf = NULL;
struct stat st;
size_t size = 0;
int fd = -1;
ssize_t n;
*len = 0;
if ((fd = open(name, O_RDONLY)) == -1)
return (NULL);
/* Just load the file into memory without decryption */
if (password == NULL) {
if (fstat(fd, &st) != 0)
goto err;
if (st.st_size < 0)
goto err;
size = (size_t)st.st_size;
if ((buf = malloc(size)) == NULL)
goto err;
n = read(fd, buf, size);
if (n < 0 || (size_t)n != size)
goto err;
close(fd);
goto done;
}
/* Or read the (possibly) encrypted key from file */
if ((fp = fdopen(fd, "r")) == NULL)
goto err;
fd = -1;
key = PEM_read_PrivateKey(fp, NULL, tls_password_cb, password);
fclose(fp);
if (key == NULL)
goto err;
/* Write unencrypted key to memory buffer */
if ((bio = BIO_new(BIO_s_mem())) == NULL)
goto err;
if (!PEM_write_bio_PrivateKey(bio, key, NULL, NULL, 0, NULL, NULL))
goto err;
if ((size = BIO_get_mem_data(bio, &data)) <= 0)
goto err;
if ((buf = malloc(size)) == NULL)
goto err;
memcpy(buf, data, size);
BIO_free_all(bio);
EVP_PKEY_free(key);
done:
*len = size;
return (buf);
err:
if (fd != -1)
close(fd);
freezero(buf, size);
BIO_free_all(bio);
EVP_PKEY_free(key);
return (NULL);
}
void
tls_unload_file(uint8_t *buf, size_t len)
{
freezero(buf, len);
}
|
