Line data Source code
1 : /* passphrase.c - Passphrase callback.
2 : Copyright (C) 2000 Werner Koch (dd9jn)
3 : Copyright (C) 2001, 2002, 2003, 2004, 2005 g10 Code GmbH
4 :
5 : This file is part of GPGME.
6 :
7 : GPGME is free software; you can redistribute it and/or modify it
8 : under the terms of the GNU Lesser General Public License as
9 : published by the Free Software Foundation; either version 2.1 of
10 : the License, or (at your option) any later version.
11 :
12 : GPGME is distributed in the hope that it will be useful, but
13 : WITHOUT ANY WARRANTY; without even the implied warranty of
14 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 : Lesser General Public License for more details.
16 :
17 : You should have received a copy of the GNU Lesser General Public
18 : License along with this program; if not, write to the Free Software
19 : Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 : 02111-1307, USA. */
21 :
22 : #if HAVE_CONFIG_H
23 : #include <config.h>
24 : #endif
25 : #include <stdio.h>
26 : #include <stdlib.h>
27 : #include <string.h>
28 : #include <assert.h>
29 : #include <errno.h>
30 :
31 : #include "gpgme.h"
32 : #include "context.h"
33 : #include "ops.h"
34 : #include "util.h"
35 : #include "debug.h"
36 :
37 :
38 : typedef struct
39 : {
40 : int no_passphrase;
41 : char *uid_hint;
42 : char *passphrase_info;
43 : int bad_passphrase;
44 : char *maxlen;
45 : } *op_data_t;
46 :
47 :
48 : static void
49 38 : release_op_data (void *hook)
50 : {
51 38 : op_data_t opd = (op_data_t) hook;
52 :
53 38 : if (opd->passphrase_info)
54 3 : free (opd->passphrase_info);
55 38 : if (opd->uid_hint)
56 0 : free (opd->uid_hint);
57 38 : free (opd->maxlen);
58 38 : }
59 :
60 :
61 : gpgme_error_t
62 364 : _gpgme_passphrase_status_handler (void *priv, gpgme_status_code_t code,
63 : char *args)
64 : {
65 364 : gpgme_ctx_t ctx = (gpgme_ctx_t) priv;
66 : gpgme_error_t err;
67 : void *hook;
68 : op_data_t opd;
69 :
70 364 : err = _gpgme_op_data_lookup (ctx, OPDATA_PASSPHRASE, &hook,
71 : sizeof (*opd), release_op_data);
72 364 : opd = hook;
73 364 : if (err)
74 0 : return err;
75 :
76 364 : switch (code)
77 : {
78 : case GPGME_STATUS_INQUIRE_MAXLEN:
79 0 : free (opd->maxlen);
80 0 : if (!(opd->maxlen = strdup (args)))
81 0 : return gpg_error_from_syserror ();
82 0 : break;
83 : case GPGME_STATUS_USERID_HINT:
84 0 : if (opd->uid_hint)
85 0 : free (opd->uid_hint);
86 0 : if (!(opd->uid_hint = strdup (args)))
87 0 : return gpg_error_from_syserror ();
88 0 : break;
89 :
90 : case GPGME_STATUS_BAD_PASSPHRASE:
91 0 : opd->bad_passphrase++;
92 0 : opd->no_passphrase = 0;
93 0 : break;
94 :
95 : case GPGME_STATUS_GOOD_PASSPHRASE:
96 0 : opd->bad_passphrase = 0;
97 0 : opd->no_passphrase = 0;
98 0 : break;
99 :
100 : case GPGME_STATUS_NEED_PASSPHRASE:
101 : case GPGME_STATUS_NEED_PASSPHRASE_SYM:
102 : case GPGME_STATUS_NEED_PASSPHRASE_PIN:
103 4 : if (opd->passphrase_info)
104 1 : free (opd->passphrase_info);
105 4 : opd->passphrase_info = strdup (args);
106 4 : if (!opd->passphrase_info)
107 0 : return gpg_error_from_syserror ();
108 4 : break;
109 :
110 : case GPGME_STATUS_MISSING_PASSPHRASE:
111 0 : opd->no_passphrase = 1;
112 0 : break;
113 :
114 : case GPGME_STATUS_EOF:
115 39 : if (opd->no_passphrase || opd->bad_passphrase)
116 0 : return gpg_error (GPG_ERR_BAD_PASSPHRASE);
117 39 : break;
118 :
119 : case GPGME_STATUS_ERROR:
120 : /* We abuse this status handler to forward ERROR status codes to
121 : the caller. This should better be done in a generic handler,
122 : but for now this is sufficient. */
123 0 : if (ctx->status_cb)
124 : {
125 0 : err = ctx->status_cb (ctx->status_cb_value, "ERROR", args);
126 0 : if (err)
127 0 : return err;
128 : }
129 0 : break;
130 :
131 : case GPGME_STATUS_FAILURE:
132 : /* We abuse this status handler to forward FAILURE status codes
133 : to the caller. This should better be done in a generic
134 : handler, but for now this is sufficient. */
135 0 : if (ctx->status_cb)
136 : {
137 0 : err = ctx->status_cb (ctx->status_cb_value, "FAILURE", args);
138 0 : if (err)
139 0 : return err;
140 : }
141 0 : break;
142 :
143 :
144 : default:
145 : /* Ignore all other codes. */
146 321 : break;
147 : }
148 364 : return 0;
149 : }
150 :
151 :
152 : gpgme_error_t
153 7 : _gpgme_passphrase_command_handler (void *priv, gpgme_status_code_t code,
154 : const char *key, int fd, int *processed)
155 : {
156 7 : gpgme_ctx_t ctx = (gpgme_ctx_t) priv;
157 : gpgme_error_t err;
158 : void *hook;
159 : op_data_t opd;
160 :
161 7 : assert (ctx->passphrase_cb);
162 :
163 7 : err = _gpgme_op_data_lookup (ctx, OPDATA_PASSPHRASE, &hook,
164 : sizeof (*opd), release_op_data);
165 7 : opd = hook;
166 7 : if (err)
167 0 : return err;
168 :
169 7 : if (code == GPGME_STATUS_GET_HIDDEN
170 0 : && (!strcmp (key, "passphrase.enter")
171 0 : || !strcmp (key, "passphrase.pin.ask")))
172 : {
173 0 : if (processed)
174 0 : *processed = 1;
175 :
176 0 : if (ctx->status_cb && opd->maxlen)
177 0 : err = ctx->status_cb (ctx->status_cb_value, "INQUIRE_MAXLEN",
178 0 : opd->maxlen);
179 :
180 0 : if (!err)
181 0 : err = ctx->passphrase_cb (ctx->passphrase_cb_value,
182 0 : opd->uid_hint, opd->passphrase_info,
183 : opd->bad_passphrase, fd);
184 :
185 : /* Reset bad passphrase flag, in case it is correct now. */
186 0 : opd->bad_passphrase = 0;
187 :
188 0 : return err;
189 : }
190 :
191 7 : return 0;
192 : }
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