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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
/* $OpenBSD: key.c,v 1.131 2017/05/30 14:16:41 markus Exp $ */
/*
* placed in the public domain
*/
#include <sys/types.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <limits.h>
#define SSH_KEY_NO_DEFINE
#include "key.h"
#include "compat.h"
#include "sshkey.h"
#include "ssherr.h"
#include "log.h"
#include "authfile.h"
static void
fatal_on_fatal_errors(int r, const char *func, int extra_fatal)
{
if (r == SSH_ERR_INTERNAL_ERROR ||
r == SSH_ERR_ALLOC_FAIL ||
(extra_fatal != 0 && r == extra_fatal))
fatal("%s: %s", func, ssh_err(r));
}
Key *
key_from_blob(const u_char *blob, u_int blen)
{
int r;
Key *ret = NULL;
if ((r = sshkey_from_blob(blob, blen, &ret)) != 0) {
fatal_on_fatal_errors(r, __func__, 0);
error("%s: %s", __func__, ssh_err(r));
return NULL;
}
return ret;
}
int
key_to_blob(const Key *key, u_char **blobp, u_int *lenp)
{
u_char *blob;
size_t blen;
int r;
if (blobp != NULL)
*blobp = NULL;
if (lenp != NULL)
*lenp = 0;
if ((r = sshkey_to_blob(key, &blob, &blen)) != 0) {
fatal_on_fatal_errors(r, __func__, 0);
error("%s: %s", __func__, ssh_err(r));
return 0;
}
if (blen > INT_MAX)
fatal("%s: giant len %zu", __func__, blen);
if (blobp != NULL)
*blobp = blob;
if (lenp != NULL)
*lenp = blen;
return blen;
}
int
key_sign(const Key *key, u_char **sigp, u_int *lenp,
const u_char *data, u_int datalen, const char *alg)
{
int r;
u_char *sig;
size_t siglen;
if (sigp != NULL)
*sigp = NULL;
if (lenp != NULL)
*lenp = 0;
if ((r = sshkey_sign(key, &sig, &siglen,
data, datalen, alg, datafellows)) != 0) {
fatal_on_fatal_errors(r, __func__, 0);
error("%s: %s", __func__, ssh_err(r));
return -1;
}
if (siglen > INT_MAX)
fatal("%s: giant len %zu", __func__, siglen);
if (sigp != NULL)
*sigp = sig;
if (lenp != NULL)
*lenp = siglen;
return 0;
}
int
key_verify(const Key *key, const u_char *signature, u_int signaturelen,
const u_char *data, u_int datalen)
{
int r;
if ((r = sshkey_verify(key, signature, signaturelen,
data, datalen, datafellows)) != 0) {
fatal_on_fatal_errors(r, __func__, 0);
error("%s: %s", __func__, ssh_err(r));
return r == SSH_ERR_SIGNATURE_INVALID ? 0 : -1;
}
return 1;
}
Key *
key_demote(const Key *k)
{
int r;
Key *ret = NULL;
if ((r = sshkey_demote(k, &ret)) != 0)
fatal("%s: %s", __func__, ssh_err(r));
return ret;
}
int
key_drop_cert(Key *k)
{
int r;
if ((r = sshkey_drop_cert(k)) != 0) {
fatal_on_fatal_errors(r, __func__, 0);
error("%s: %s", __func__, ssh_err(r));
return -1;
}
return 0;
}
int
key_cert_check_authority(const Key *k, int want_host, int require_principal,
const char *name, const char **reason)
{
int r;
if ((r = sshkey_cert_check_authority(k, want_host, require_principal,
name, reason)) != 0) {
fatal_on_fatal_errors(r, __func__, 0);
error("%s: %s", __func__, ssh_err(r));
return -1;
}
return 0;
}
/* authfile.c */
Key *
key_load_cert(const char *filename)
{
int r;
Key *ret = NULL;
if ((r = sshkey_load_cert(filename, &ret)) != 0) {
fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR);
/* Old authfile.c ignored all file errors. */
if (r == SSH_ERR_SYSTEM_ERROR)
debug("%s: %s", __func__, ssh_err(r));
else
error("%s: %s", __func__, ssh_err(r));
return NULL;
}
return ret;
}
Key *
key_load_public(const char *filename, char **commentp)
{
int r;
Key *ret = NULL;
if ((r = sshkey_load_public(filename, &ret, commentp)) != 0) {
fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR);
/* Old authfile.c ignored all file errors. */
if (r == SSH_ERR_SYSTEM_ERROR)
debug("%s: %s", __func__, ssh_err(r));
else
error("%s: %s", __func__, ssh_err(r));
return NULL;
}
return ret;
}
Key *
key_load_private(const char *path, const char *passphrase,
char **commentp)
{
int r;
Key *ret = NULL;
if ((r = sshkey_load_private(path, passphrase, &ret, commentp)) != 0) {
fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR);
/* Old authfile.c ignored all file errors. */
if (r == SSH_ERR_SYSTEM_ERROR ||
r == SSH_ERR_KEY_WRONG_PASSPHRASE)
debug("%s: %s", __func__, ssh_err(r));
else
error("%s: %s", __func__, ssh_err(r));
return NULL;
}
return ret;
}
Key *
key_load_private_cert(int type, const char *filename, const char *passphrase,
int *perm_ok)
{
int r;
Key *ret = NULL;
if ((r = sshkey_load_private_cert(type, filename, passphrase,
&ret, perm_ok)) != 0) {
fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR);
/* Old authfile.c ignored all file errors. */
if (r == SSH_ERR_SYSTEM_ERROR ||
r == SSH_ERR_KEY_WRONG_PASSPHRASE)
debug("%s: %s", __func__, ssh_err(r));
else
error("%s: %s", __func__, ssh_err(r));
return NULL;
}
return ret;
}
Key *
key_load_private_type(int type, const char *filename, const char *passphrase,
char **commentp, int *perm_ok)
{
int r;
Key *ret = NULL;
if ((r = sshkey_load_private_type(type, filename, passphrase,
&ret, commentp, perm_ok)) != 0) {
fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR);
/* Old authfile.c ignored all file errors. */
if (r == SSH_ERR_SYSTEM_ERROR ||
(r == SSH_ERR_KEY_WRONG_PASSPHRASE))
debug("%s: %s", __func__, ssh_err(r));
else
error("%s: %s", __func__, ssh_err(r));
return NULL;
}
return ret;
}
|
