Line data Source code
1 : /* encrypt.c - Encrypt function.
2 : Copyright (C) 2000 Werner Koch (dd9jn)
3 : Copyright (C) 2001, 2002, 2003, 2004 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 <stdlib.h>
26 : #include <string.h>
27 : #include <errno.h>
28 :
29 : #include "gpgme.h"
30 : #include "debug.h"
31 : #include "context.h"
32 : #include "ops.h"
33 :
34 :
35 : typedef struct
36 : {
37 : struct _gpgme_op_encrypt_result result;
38 :
39 : /* The error code from a FAILURE status line or 0. */
40 : gpg_error_t failure_code;
41 :
42 : /* A pointer to the next pointer of the last invalid recipient in
43 : the list. This makes appending new invalid recipients painless
44 : while preserving the order. */
45 : gpgme_invalid_key_t *lastp;
46 : } *op_data_t;
47 :
48 :
49 : static void
50 28 : release_op_data (void *hook)
51 : {
52 28 : op_data_t opd = (op_data_t) hook;
53 28 : gpgme_invalid_key_t invalid_recipient = opd->result.invalid_recipients;
54 :
55 56 : while (invalid_recipient)
56 : {
57 0 : gpgme_invalid_key_t next = invalid_recipient->next;
58 0 : if (invalid_recipient->fpr)
59 0 : free (invalid_recipient->fpr);
60 0 : free (invalid_recipient);
61 0 : invalid_recipient = next;
62 : }
63 28 : }
64 :
65 :
66 : gpgme_encrypt_result_t
67 24 : gpgme_op_encrypt_result (gpgme_ctx_t ctx)
68 : {
69 : void *hook;
70 : op_data_t opd;
71 : gpgme_error_t err;
72 :
73 24 : TRACE_BEG (DEBUG_CTX, "gpgme_op_encrypt_result", ctx);
74 :
75 24 : err = _gpgme_op_data_lookup (ctx, OPDATA_ENCRYPT, &hook, -1, NULL);
76 24 : opd = hook;
77 :
78 24 : if (err || !opd)
79 : {
80 0 : TRACE_SUC0 ("result=(null)");
81 0 : return NULL;
82 : }
83 :
84 : if (_gpgme_debug_trace ())
85 : {
86 24 : gpgme_invalid_key_t invkeys = opd->result.invalid_recipients;
87 24 : int i = 0;
88 :
89 48 : while (invkeys)
90 : {
91 0 : TRACE_LOG3 ("invalid_recipients[%i] = %s (%s)",
92 : i, invkeys->fpr ? invkeys->fpr : "(null)",
93 : gpg_strerror (invkeys->reason));
94 0 : invkeys = invkeys->next;
95 0 : i++;
96 : }
97 : }
98 :
99 24 : TRACE_SUC1 ("result=%p", &opd->result);
100 24 : return &opd->result;
101 : }
102 :
103 :
104 : gpgme_error_t
105 128 : _gpgme_encrypt_status_handler (void *priv, gpgme_status_code_t code,
106 : char *args)
107 : {
108 128 : gpgme_ctx_t ctx = (gpgme_ctx_t) priv;
109 : gpgme_error_t err;
110 : void *hook;
111 : op_data_t opd;
112 :
113 128 : err = _gpgme_op_data_lookup (ctx, OPDATA_ENCRYPT, &hook, -1, NULL);
114 128 : opd = hook;
115 128 : if (err)
116 0 : return err;
117 :
118 128 : switch (code)
119 : {
120 : case GPGME_STATUS_FAILURE:
121 0 : opd->failure_code = _gpgme_parse_failure (args);
122 0 : break;
123 :
124 : case GPGME_STATUS_EOF:
125 26 : if (opd->result.invalid_recipients)
126 0 : return gpg_error (GPG_ERR_UNUSABLE_PUBKEY);
127 26 : if (opd->failure_code)
128 0 : return opd->failure_code;
129 26 : break;
130 :
131 : case GPGME_STATUS_INV_RECP:
132 0 : err = _gpgme_parse_inv_recp (args, opd->lastp);
133 0 : if (err)
134 0 : return err;
135 :
136 0 : opd->lastp = &(*opd->lastp)->next;
137 0 : break;
138 :
139 : case GPGME_STATUS_NO_RECP:
140 : /* Should not happen, because we require at least one recipient. */
141 0 : return gpg_error (GPG_ERR_GENERAL);
142 :
143 : default:
144 102 : break;
145 : }
146 128 : return 0;
147 : }
148 :
149 :
150 : static gpgme_error_t
151 8 : encrypt_sym_status_handler (void *priv, gpgme_status_code_t code, char *args)
152 : {
153 : gpgme_error_t err;
154 :
155 8 : err = _gpgme_progress_status_handler (priv, code, args);
156 8 : if (!err)
157 8 : err = _gpgme_passphrase_status_handler (priv, code, args);
158 8 : return err;
159 : }
160 :
161 :
162 : static gpgme_error_t
163 121 : encrypt_status_handler (void *priv, gpgme_status_code_t code, char *args)
164 : {
165 242 : return _gpgme_progress_status_handler (priv, code, args)
166 121 : || _gpgme_encrypt_status_handler (priv, code, args);
167 : }
168 :
169 :
170 : gpgme_error_t
171 28 : _gpgme_op_encrypt_init_result (gpgme_ctx_t ctx)
172 : {
173 : gpgme_error_t err;
174 : void *hook;
175 : op_data_t opd;
176 :
177 28 : err = _gpgme_op_data_lookup (ctx, OPDATA_ENCRYPT, &hook, sizeof (*opd),
178 : release_op_data);
179 28 : opd = hook;
180 28 : if (err)
181 0 : return err;
182 :
183 28 : opd->lastp = &opd->result.invalid_recipients;
184 28 : return 0;
185 : }
186 :
187 :
188 : static gpgme_error_t
189 26 : encrypt_start (gpgme_ctx_t ctx, int synchronous, gpgme_key_t recp[],
190 : gpgme_encrypt_flags_t flags,
191 : gpgme_data_t plain, gpgme_data_t cipher)
192 : {
193 : gpgme_error_t err;
194 26 : int symmetric = 0;
195 :
196 26 : err = _gpgme_op_reset (ctx, synchronous);
197 26 : if (err)
198 0 : return err;
199 :
200 26 : err = _gpgme_op_encrypt_init_result (ctx);
201 26 : if (err)
202 0 : return err;
203 :
204 26 : if (!recp)
205 1 : symmetric = 1;
206 :
207 26 : if (!plain)
208 0 : return gpg_error (GPG_ERR_NO_DATA);
209 26 : if (!cipher)
210 0 : return gpg_error (GPG_ERR_INV_VALUE);
211 26 : if (recp && ! *recp)
212 0 : return gpg_error (GPG_ERR_INV_VALUE);
213 :
214 26 : if (symmetric && ctx->passphrase_cb)
215 : {
216 : /* Symmetric encryption requires a passphrase. */
217 1 : err = _gpgme_engine_set_command_handler
218 : (ctx->engine, _gpgme_passphrase_command_handler, ctx, NULL);
219 1 : if (err)
220 0 : return err;
221 : }
222 :
223 26 : _gpgme_engine_set_status_handler (ctx->engine,
224 : symmetric
225 : ? encrypt_sym_status_handler
226 : : encrypt_status_handler,
227 : ctx);
228 :
229 26 : return _gpgme_engine_op_encrypt (ctx->engine, recp, flags, plain, cipher,
230 26 : ctx->use_armor);
231 : }
232 :
233 :
234 : gpgme_error_t
235 1 : gpgme_op_encrypt_start (gpgme_ctx_t ctx, gpgme_key_t recp[],
236 : gpgme_encrypt_flags_t flags,
237 : gpgme_data_t plain, gpgme_data_t cipher)
238 : {
239 : gpgme_error_t err;
240 :
241 1 : TRACE_BEG3 (DEBUG_CTX, "gpgme_op_encrypt_start", ctx,
242 : "flags=0x%x, plain=%p, cipher=%p", flags, plain, cipher);
243 :
244 1 : if (!ctx)
245 0 : return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
246 :
247 1 : if (_gpgme_debug_trace () && recp)
248 : {
249 1 : int i = 0;
250 :
251 4 : while (recp[i])
252 : {
253 2 : TRACE_LOG3 ("recipient[%i] = %p (%s)", i, recp[i],
254 : (recp[i]->subkeys && recp[i]->subkeys->fpr) ?
255 : recp[i]->subkeys->fpr : "invalid");
256 2 : i++;
257 : }
258 : }
259 :
260 1 : err = encrypt_start (ctx, 0, recp, flags, plain, cipher);
261 1 : return TRACE_ERR (err);
262 : }
263 :
264 :
265 : /* Encrypt plaintext PLAIN within CTX for the recipients RECP and
266 : store the resulting ciphertext in CIPHER. */
267 : gpgme_error_t
268 25 : gpgme_op_encrypt (gpgme_ctx_t ctx, gpgme_key_t recp[],
269 : gpgme_encrypt_flags_t flags,
270 : gpgme_data_t plain, gpgme_data_t cipher)
271 : {
272 : gpgme_error_t err;
273 :
274 25 : TRACE_BEG3 (DEBUG_CTX, "gpgme_op_encrypt", ctx,
275 : "flags=0x%x, plain=%p, cipher=%p", flags, plain, cipher);
276 :
277 25 : if (!ctx)
278 0 : return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
279 :
280 25 : if (_gpgme_debug_trace () && recp)
281 : {
282 24 : int i = 0;
283 :
284 94 : while (recp[i])
285 : {
286 46 : TRACE_LOG3 ("recipient[%i] = %p (%s)", i, recp[i],
287 : (recp[i]->subkeys && recp[i]->subkeys->fpr) ?
288 : recp[i]->subkeys->fpr : "invalid");
289 46 : i++;
290 : }
291 : }
292 :
293 25 : err = encrypt_start (ctx, 1, recp, flags, plain, cipher);
294 25 : if (!err)
295 25 : err = _gpgme_wait_one (ctx);
296 25 : return TRACE_ERR (err);
297 : }
|
