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
|
/* call-dirmngr.c - communication with the dromngr
* Copyright (C) 2002 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include <assert.h>
#include <gcrypt.h>
#include "gpgsm.h"
#include "../assuan/assuan.h"
#include "i18n.h"
static ASSUAN_CONTEXT dirmngr_ctx = NULL;
struct inq_certificate_parm_s {
ASSUAN_CONTEXT ctx;
KsbaCert cert;
};
struct membuf {
size_t len;
size_t size;
char *buf;
int out_of_core;
};
/* Try to connect to the agent via socket or fork it off and work by
pipes. Handle the server's initial greeting */
static int
start_dirmngr (void)
{
int rc;
char *infostr, *p;
if (dirmngr_ctx)
return 0; /* fixme: We need a context for each thread or serialize
the access to the agent (which is suitable given that
the agent is not MT */
infostr = getenv ("DIRMNGR_INFO");
if (!infostr)
{
const char *pgmname;
ASSUAN_CONTEXT ctx;
const char *argv[3];
log_info (_("no running dirmngr - starting one\n"));
if (fflush (NULL))
{
log_error ("error flushing pending output: %s\n", strerror (errno));
return seterr (Write_Error);
}
if (!opt.dirmngr_program || !*opt.dirmngr_program)
opt.dirmngr_program = "/usr/sbin/dirmngr";
if ( !(pgmname = strrchr (opt.dirmngr_program, '/')))
pgmname = opt.dirmngr_program;
else
pgmname++;
argv[0] = pgmname;
argv[1] = "--server";
argv[2] = NULL;
/* connect to the agent and perform initial handshaking */
rc = assuan_pipe_connect (&ctx, opt.dirmngr_program, (char**)argv, 0);
if (rc)
{
log_error ("can't connect to the dirmngr: %s\n", assuan_strerror (rc));
return seterr (No_Dirmngr);
}
dirmngr_ctx = ctx;
}
else
{
infostr = xstrdup (infostr);
if ( !(p = strchr (infostr, ':')) || p == infostr
/* || (p-infostr)+1 >= sizeof client_addr.sun_path */)
{
log_error (_("malformed DIRMNGR_INFO environment variable\n"));
xfree (infostr);
return seterr (General_Error);
}
*p = 0;
log_error (_("socket based dirmngr communication not yet implemented\n"));
return seterr (Not_Implemented);
}
log_debug ("connection to dirmngr established\n");
return 0;
}
/* Handle a SENDCERT inquiry. */
static AssuanError
inq_certificate (void *opaque, const char *line)
{
struct inq_certificate_parm_s *parm = opaque;
AssuanError rc;
const unsigned char *der;
size_t derlen;
if (!(!strncmp (line, "SENDCERT", 8) && (line[8] == ' ' || !line[8])))
{
log_error ("unsupported inquiry `%s'\n", line);
return ASSUAN_Inquire_Unknown;
}
line += 8;
if (!*line)
{ /* send the current certificate */
der = ksba_cert_get_image (parm->cert, &derlen);
if (!der)
rc = ASSUAN_Inquire_Error;
else
rc = assuan_send_data (parm->ctx, der, derlen);
}
else
{ /* send the given certificate */
int err;
KsbaCert cert;
err = gpgsm_find_cert (line, &cert);
if (err)
{
log_error ("certificate not found: %s\n", gnupg_strerror (err));
rc = ASSUAN_Inquire_Error;
}
else
{
der = ksba_cert_get_image (cert, &derlen);
if (!der)
rc = ASSUAN_Inquire_Error;
else
rc = assuan_send_data (parm->ctx, der, derlen);
ksba_cert_release (cert);
}
}
return rc;
}
/* Call the directory manager to check whether the certificate is valid
Returns 0 for valid or usually one of the errors:
GNUPG_Certificate_Revoked
GNUPG_No_CRL_Known
GNUPG_CRL_Too_Old
*/
int
gpgsm_dirmngr_isvalid (KsbaCert cert)
{
int rc;
char *certid;
char line[ASSUAN_LINELENGTH];
struct inq_certificate_parm_s parm;
rc = start_dirmngr ();
if (rc)
return rc;
certid = gpgsm_get_certid (cert);
if (!certid)
{
log_error ("error getting the certificate ID\n");
return seterr (General_Error);
}
parm.ctx = dirmngr_ctx;
parm.cert = cert;
snprintf (line, DIM(line)-1, "ISVALID %s", certid);
line[DIM(line)-1] = 0;
xfree (certid);
rc = assuan_transact (dirmngr_ctx, line, NULL, NULL, inq_certificate, &parm);
return map_assuan_err (rc);
}
|
