Line data Source code
1 : /* tofupolicy.c - Tofu policy helpers.
2 : * Copyright (C) 2016 g10 Code GmbH
3 : *
4 : * This file is part of GPGME.
5 : *
6 : * GPGME is free software; you can redistribute it and/or modify it
7 : * under the terms of the GNU Lesser General Public License as
8 : * published by the Free Software Foundation; either version 2.1 of
9 : * the License, or (at your option) any later version.
10 : *
11 : * GPGME is distributed in the hope that it will be useful, but
12 : * WITHOUT ANY WARRANTY; without even the implied warranty of
13 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 : * Lesser General Public License for more details.
15 : *
16 : * You should have received a copy of the GNU Lesser General Public
17 : * License along with this program; if not, see <https://www.gnu.org/licenses/>.
18 : */
19 :
20 : #if HAVE_CONFIG_H
21 : #include <config.h>
22 : #endif
23 : #include <stdlib.h>
24 :
25 : #include "gpgme.h"
26 : #include "debug.h"
27 : #include "context.h"
28 : #include "ops.h"
29 :
30 :
31 : typedef struct
32 : {
33 : /* The error code from a FAILURE status line or 0. */
34 : gpg_error_t failure_code;
35 :
36 : /* The error code from an ERROR status line or 0. */
37 : gpg_error_t error_code;
38 :
39 : } *op_data_t;
40 :
41 :
42 :
43 : /* Parse an error status line. Return the error location and the
44 : error code. The function may modify ARGS. */
45 : static char *
46 0 : parse_error (char *args, gpg_error_t *r_err)
47 : {
48 0 : char *where = strchr (args, ' ');
49 : char *which;
50 :
51 0 : if (where)
52 : {
53 0 : *where = '\0';
54 0 : which = where + 1;
55 :
56 0 : where = strchr (which, ' ');
57 0 : if (where)
58 0 : *where = '\0';
59 :
60 0 : where = args;
61 : }
62 : else
63 : {
64 0 : *r_err = trace_gpg_error (GPG_ERR_INV_ENGINE);
65 0 : return NULL;
66 : }
67 :
68 0 : *r_err = atoi (which);
69 :
70 0 : return where;
71 : }
72 :
73 :
74 : static gpgme_error_t
75 0 : tofu_policy_status_handler (void *priv, gpgme_status_code_t code, char *args)
76 : {
77 0 : gpgme_ctx_t ctx = (gpgme_ctx_t) priv;
78 : gpgme_error_t err;
79 : void *hook;
80 : op_data_t opd;
81 : char *loc;
82 :
83 0 : err = _gpgme_op_data_lookup (ctx, OPDATA_TOFU_POLICY, &hook, -1, NULL);
84 0 : opd = hook;
85 0 : if (err)
86 0 : return err;
87 :
88 0 : switch (code)
89 : {
90 : case GPGME_STATUS_ERROR:
91 0 : loc = parse_error (args, &err);
92 0 : if (!loc)
93 0 : return err;
94 0 : if (!opd->error_code)
95 0 : opd->error_code = err;
96 0 : break;
97 :
98 : case GPGME_STATUS_FAILURE:
99 0 : opd->failure_code = _gpgme_parse_failure (args);
100 0 : break;
101 :
102 : case GPGME_STATUS_EOF:
103 0 : if (opd->error_code)
104 0 : err = opd->error_code;
105 0 : else if (opd->failure_code)
106 0 : err = opd->failure_code;
107 0 : break;
108 :
109 : default:
110 0 : break;
111 : }
112 :
113 0 : return err;
114 : }
115 :
116 :
117 : /* Set the TOFU policy for KEY to POLICY. */
118 : static gpgme_error_t
119 0 : tofu_policy_start (gpgme_ctx_t ctx, int synchronous,
120 : gpgme_key_t key, gpgme_tofu_policy_t policy)
121 : {
122 : gpgme_error_t err;
123 : void *hook;
124 : op_data_t opd;
125 :
126 0 : if (ctx->protocol != GPGME_PROTOCOL_OPENPGP)
127 0 : return gpgme_error (GPG_ERR_UNSUPPORTED_PROTOCOL);
128 :
129 0 : if (!key)
130 0 : return gpg_error (GPG_ERR_INV_VALUE);
131 :
132 0 : err = _gpgme_op_reset (ctx, synchronous);
133 0 : if (err)
134 0 : return err;
135 :
136 0 : err = _gpgme_op_data_lookup (ctx, OPDATA_TOFU_POLICY, &hook,
137 : sizeof (*opd), NULL);
138 0 : opd = hook;
139 0 : if (err)
140 0 : return err;
141 :
142 0 : _gpgme_engine_set_status_handler (ctx->engine, tofu_policy_status_handler,
143 : ctx);
144 :
145 0 : return _gpgme_engine_op_tofu_policy (ctx->engine, key, policy);
146 : }
147 :
148 :
149 :
150 : /* Set the TOFU policy of KEY to POLCIY. This is the asynchronous
151 : * variant. */
152 : gpgme_error_t
153 0 : gpgme_op_tofu_policy_start (gpgme_ctx_t ctx,
154 : gpgme_key_t key, gpgme_tofu_policy_t policy)
155 : {
156 : gpg_error_t err;
157 0 : TRACE_BEG2 (DEBUG_CTX, "gpgme_op_tofu_policy_start", ctx,
158 : "key=%p, policy=%u", key, (unsigned int)policy);
159 :
160 0 : if (!ctx)
161 0 : return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
162 :
163 0 : err = tofu_policy_start (ctx, 0, key, policy);
164 0 : return TRACE_ERR (err);
165 : }
166 :
167 :
168 : /* This is the synchronous variant of gpgme_op_tofu_policy_start. */
169 : gpgme_error_t
170 0 : gpgme_op_tofu_policy (gpgme_ctx_t ctx,
171 : gpgme_key_t key, gpgme_tofu_policy_t policy)
172 : {
173 : gpgme_error_t err;
174 0 : TRACE_BEG2 (DEBUG_CTX, "gpgme_op_tofu_policy", ctx,
175 : "key=%p, policy=%u", key, (unsigned int)policy);
176 :
177 0 : if (!ctx)
178 0 : return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
179 :
180 0 : err = tofu_policy_start (ctx, 1, key, policy);
181 0 : if (!err)
182 0 : err = _gpgme_wait_one (ctx);
183 0 : return TRACE_ERR (err);
184 : }
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