replace deprecated g_memmove with memmove
[claws.git] / src / plugins / pgpinline / pgpinline.c
1 /*
2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999-2016 Colin Leroy and the Claws Mail team
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 3 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
17  */
18
19 #ifdef HAVE_CONFIG_H
20 #  include "config.h"
21 #include "claws-features.h"
22 #endif
23
24 #ifdef USE_GPGME
25
26 #include "defs.h"
27 #include <glib.h>
28 #include <glib/gi18n.h>
29 #include <errno.h>
30 #include <gpgme.h>
31 #include <file-utils.h>
32
33 #include "utils.h"
34 #include "privacy.h"
35 #include "procmime.h"
36 #include "pgpinline.h"
37 #include <plugins/pgpcore/sgpgme.h>
38 #include <plugins/pgpcore/prefs_gpg.h>
39 #include <plugins/pgpcore/passphrase.h>
40 #include <plugins/pgpcore/pgp_utils.h>
41 #include "quoted-printable.h"
42 #include "codeconv.h"
43 #include "plugin.h"
44
45 extern struct GPGConfig prefs_gpg;
46
47 typedef struct _PrivacyDataPGP PrivacyDataPGP;
48
49 struct _PrivacyDataPGP
50 {
51         PrivacyData     data;
52         
53         gboolean        done_sigtest;
54         gboolean        is_signed;
55         gpgme_verify_result_t   sigstatus;
56         gpgme_ctx_t     ctx;
57 };
58
59 static PrivacySystem pgpinline_system;
60
61 static gint pgpinline_check_signature(MimeInfo *mimeinfo);
62
63 static PrivacyDataPGP *pgpinline_new_privacydata()
64 {
65         PrivacyDataPGP *data;
66         gpgme_error_t err;
67
68         data = g_new0(PrivacyDataPGP, 1);
69         data->data.system = &pgpinline_system;
70         data->done_sigtest = FALSE;
71         data->is_signed = FALSE;
72         data->sigstatus = NULL;
73         if ((err = gpgme_new(&data->ctx)) != GPG_ERR_NO_ERROR) {
74                 debug_print(("Couldn't initialize GPG context, %s\n"), gpgme_strerror(err));
75                 return NULL;
76         }
77         
78         return data;
79 }
80
81 static void pgpinline_free_privacydata(PrivacyData *_data)
82 {
83         PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
84         gpgme_release(data->ctx);
85         g_free(data);
86 }
87
88 static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
89 {
90         PrivacyDataPGP *data = NULL;
91         const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
92         gchar *textdata, *sigpos;
93         
94         cm_return_val_if_fail(mimeinfo != NULL, FALSE);
95         
96         if (procmime_mimeinfo_parent(mimeinfo) == NULL)
97                 return FALSE; /* not parent */
98         
99         if (mimeinfo->type != MIMETYPE_TEXT &&
100                 (mimeinfo->type != MIMETYPE_APPLICATION ||
101                  g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
102                 return FALSE;
103
104         /* Seal the deal. This has to be text/plain through and through. */
105         if (mimeinfo->type == MIMETYPE_APPLICATION)
106         {
107                 mimeinfo->type = MIMETYPE_TEXT;
108                 g_free(mimeinfo->subtype);
109                 mimeinfo->subtype = g_strdup("plain");
110         }
111
112         if (mimeinfo->privacy != NULL) {
113                 data = (PrivacyDataPGP *) mimeinfo->privacy;
114                 if (data->done_sigtest)
115                         return data->is_signed;
116         }
117         
118         textdata = procmime_get_part_as_string(mimeinfo, TRUE);
119         if (!textdata)
120                 return FALSE;
121         
122         if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
123                 g_free(textdata);
124                 return FALSE;
125         }
126
127         if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
128                 g_free(textdata);
129                 return FALSE;
130         }
131
132         g_free(textdata);
133
134         if (data == NULL) {
135                 data = pgpinline_new_privacydata();
136                 mimeinfo->privacy = (PrivacyData *) data;
137         }
138         if (data != NULL) {
139                 data->done_sigtest = TRUE;
140                 data->is_signed = TRUE;
141         }
142
143         return TRUE;
144 }
145
146 static gint pgpinline_check_signature(MimeInfo *mimeinfo)
147 {
148         PrivacyDataPGP *data = NULL;
149         gchar *textdata = NULL, *tmp = NULL;
150         gpgme_data_t plain = NULL, cipher = NULL;
151         gpgme_error_t err;
152
153         cm_return_val_if_fail(mimeinfo != NULL, 0);
154
155         if (procmime_mimeinfo_parent(mimeinfo) == NULL) {
156                 privacy_set_error(_("Incorrect part"));
157                 return 0; /* not parent */
158         }
159         if (mimeinfo->type != MIMETYPE_TEXT) {
160                 privacy_set_error(_("Not a text part"));
161                 debug_print("type %d\n", mimeinfo->type);
162                 return 0;
163         }
164         cm_return_val_if_fail(mimeinfo->privacy != NULL, 0);
165         data = (PrivacyDataPGP *) mimeinfo->privacy;
166
167         textdata = procmime_get_part_as_string(mimeinfo, TRUE);
168
169         if (!textdata) {
170                 g_free(textdata);
171                 privacy_set_error(_("Couldn't get text data."));
172                 return 0;
173         }
174
175         /* gtk2: convert back from utf8 */
176         tmp = conv_codeset_strdup(textdata, CS_UTF_8,
177                         procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
178         if (!tmp) {
179                 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
180                         conv_get_locale_charset_str_no_utf8());
181         }
182         if (!tmp) {
183                 g_warning("Can't convert charset to anything sane");
184                 tmp = conv_codeset_strdup(textdata, CS_UTF_8, CS_US_ASCII);
185         }
186         g_free(textdata);
187
188         if (!tmp) {
189                 privacy_set_error(_("Couldn't convert text data to any sane charset."));
190                 return 0;
191         }
192         textdata = g_strdup(tmp);
193         g_free(tmp);
194         
195         if ((err = gpgme_new(&data->ctx)) != GPG_ERR_NO_ERROR) {
196                 debug_print(("Couldn't initialize GPG context, %s\n"), gpgme_strerror(err));
197                 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
198                 g_free(textdata);
199                 return 0;
200         }
201         gpgme_set_textmode(data->ctx, 1);
202         gpgme_set_armor(data->ctx, 1);
203         
204         gpgme_data_new_from_mem(&plain, textdata, (size_t)strlen(textdata), 1);
205         gpgme_data_new(&cipher);
206
207         data->sigstatus = sgpgme_verify_signature(data->ctx, plain, NULL, cipher);
208         
209         gpgme_data_release(plain);
210         gpgme_data_release(cipher);
211         
212         g_free(textdata);
213         
214         return 0;
215 }
216
217 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
218 {
219         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
220
221         cm_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
222
223         return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
224 }
225
226 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
227 {
228         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
229
230         cm_return_val_if_fail(data != NULL, g_strdup("Error"));
231
232         return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
233 }
234
235 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
236 {
237         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
238         
239         cm_return_val_if_fail(data != NULL, g_strdup("Error"));
240
241         return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
242 }
243
244 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
245 {
246         const gchar *begin_indicator = "-----BEGIN PGP MESSAGE-----";
247         const gchar *end_indicator = "-----END PGP MESSAGE-----";
248         gchar *textdata;
249         
250         cm_return_val_if_fail(mimeinfo != NULL, FALSE);
251         
252         if (procmime_mimeinfo_parent(mimeinfo) == NULL)
253                 return FALSE; /* not parent */
254         
255         if (mimeinfo->type != MIMETYPE_TEXT &&
256                 (mimeinfo->type != MIMETYPE_APPLICATION ||
257                  g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
258                 return FALSE;
259         
260         /* Seal the deal. This has to be text/plain through and through. */
261         if (mimeinfo->type == MIMETYPE_APPLICATION)
262         {
263                 mimeinfo->type = MIMETYPE_TEXT;
264                 g_free(mimeinfo->subtype);
265                 mimeinfo->subtype = g_strdup("plain");
266         }
267
268         textdata = procmime_get_part_as_string(mimeinfo, TRUE);
269         if (!textdata)
270                 return FALSE;
271
272         if (!pgp_locate_armor_header(textdata, begin_indicator)) {
273                 g_free(textdata);
274                 return FALSE;
275         }
276         if (!pgp_locate_armor_header(textdata, end_indicator)) {
277                 g_free(textdata);
278                 return FALSE;
279         }
280
281         g_free(textdata);
282
283         return TRUE;
284 }
285
286 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
287 {
288         MimeInfo *decinfo, *parseinfo;
289         gpgme_data_t cipher, plain;
290         FILE *dstfp;
291         gchar *fname;
292         gchar *textdata = NULL;
293         static gint id = 0;
294         const gchar *src_codeset = NULL;
295         gpgme_verify_result_t sigstat = 0;
296         PrivacyDataPGP *data = NULL;
297         gpgme_ctx_t ctx;
298         gchar *chars;
299         size_t len;
300         const gchar *begin_indicator = "-----BEGIN PGP MESSAGE-----";
301         const gchar *end_indicator = "-----END PGP MESSAGE-----";
302         gchar *pos;
303         
304         if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
305                 return NULL;
306
307         gpgme_set_textmode(ctx, 1);
308         gpgme_set_armor(ctx, 1);
309
310         cm_return_val_if_fail(mimeinfo != NULL, NULL);
311         cm_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
312         
313         if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
314             mimeinfo->type != MIMETYPE_TEXT) {
315                 gpgme_release(ctx);
316                 privacy_set_error(_("Couldn't parse mime part."));
317                 return NULL;
318         }
319
320         textdata = procmime_get_part_as_string(mimeinfo, TRUE);
321         if (!textdata) {
322                 gpgme_release(ctx);
323                 privacy_set_error(_("Couldn't get text data."));
324                 return NULL;
325         }
326
327         debug_print("decrypting '%s'\n", textdata);
328         gpgme_data_new_from_mem(&cipher, textdata, (size_t)strlen(textdata), 1);
329
330         plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
331         if (sigstat && !sigstat->signatures)
332                 sigstat = NULL;
333
334         gpgme_data_release(cipher);
335         
336         if (plain == NULL) {
337                 gpgme_release(ctx);
338                 return NULL;
339         }
340
341         fname = g_strdup_printf("%s%cplaintext.%08x",
342                 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
343
344         if ((dstfp = claws_fopen(fname, "wb")) == NULL) {
345                 FILE_OP_ERROR(fname, "claws_fopen");
346                 privacy_set_error(_("Couldn't open decrypted file %s"), fname);
347                 g_free(fname);
348                 gpgme_data_release(plain);
349                 gpgme_release(ctx);
350                 return NULL;
351         }
352
353         src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
354         if (src_codeset == NULL)
355                 src_codeset = CS_ISO_8859_1;
356                 
357         if (fprintf(dstfp, "MIME-Version: 1.0\r\n"
358                         "Content-Type: text/plain; charset=%s\r\n"
359                         "Content-Transfer-Encoding: 8bit\r\n"
360                         "\r\n",
361                         src_codeset) < 0) {
362                 FILE_OP_ERROR(fname, "fprintf");
363                 privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
364                 goto FILE_ERROR;
365         }
366
367         /* Store any part before encrypted text */
368         pos = pgp_locate_armor_header(textdata, begin_indicator);
369         if (pos != NULL && (pos - textdata) > 0) {
370             if (claws_fwrite(textdata, 1, pos - textdata, dstfp) < pos - textdata) {
371                 FILE_OP_ERROR(fname, "claws_fwrite");
372                 privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
373                 goto FILE_ERROR;
374             }
375         }
376         
377         if (claws_fwrite(_("\n--- Start of PGP/Inline encrypted data ---\n"), 1,
378                 strlen(_("\n--- Start of PGP/Inline encrypted data ---\n")), 
379                 dstfp) < strlen(_("\n--- Start of PGP/Inline encrypted data ---\n"))) {
380                 FILE_OP_ERROR(fname, "claws_fwrite");
381                 privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
382                 goto FILE_ERROR;
383         }
384         chars = sgpgme_data_release_and_get_mem(plain, &len);
385         if (len > 0) {
386                 if (claws_fwrite(chars, 1, len, dstfp) < len) {
387                         FILE_OP_ERROR(fname, "claws_fwrite");
388                         g_free(chars);
389                         privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
390                         goto FILE_ERROR;
391                 }
392         }
393         g_free(chars);
394         /* Store any part after encrypted text */
395         if (claws_fwrite(_("--- End of PGP/Inline encrypted data ---\n"), 1,
396                 strlen(_("--- End of PGP/Inline encrypted data ---\n")), 
397                 dstfp) < strlen(_("--- End of PGP/Inline encrypted data ---\n"))) {
398                         FILE_OP_ERROR(fname, "claws_fwrite");
399                         privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
400                         goto FILE_ERROR;
401         }
402         if (pos != NULL) {
403             pos = pgp_locate_armor_header(pos, end_indicator);
404             if (pos != NULL && *pos != '\0') {
405                 pos += strlen(end_indicator);
406                 if (claws_fwrite(pos, 1, strlen(pos), dstfp) < strlen(pos)) {
407                         FILE_OP_ERROR(fname, "claws_fwrite");
408                         privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
409                         goto FILE_ERROR;
410                 }
411             }
412         }
413
414         if (claws_safe_fclose(dstfp) == EOF) {
415                 FILE_OP_ERROR(fname, "claws_fclose");
416                 privacy_set_error(_("Couldn't close decrypted file %s"), fname);
417                 g_free(fname);
418                 gpgme_data_release(plain);
419                 gpgme_release(ctx);
420                 return NULL;
421         }
422         
423         parseinfo = procmime_scan_file(fname);
424         g_free(fname);
425         
426         if (parseinfo == NULL) {
427                 gpgme_release(ctx);
428                 privacy_set_error(_("Couldn't scan decrypted file."));
429                 return NULL;
430         }
431         decinfo = g_node_first_child(parseinfo->node) != NULL ?
432                 g_node_first_child(parseinfo->node)->data : NULL;
433                 
434         if (decinfo == NULL) {
435                 gpgme_release(ctx);
436                 privacy_set_error(_("Couldn't scan decrypted file parts."));
437                 return NULL;
438         }
439
440         g_node_unlink(decinfo->node);
441         procmime_mimeinfo_free_all(&parseinfo);
442
443         decinfo->tmp = TRUE;
444
445         if (sigstat != GPGME_SIG_STAT_NONE) {
446                 if (decinfo->privacy != NULL) {
447                         data = (PrivacyDataPGP *) decinfo->privacy;
448                 } else {
449                         data = pgpinline_new_privacydata();
450                         decinfo->privacy = (PrivacyData *) data;        
451                 }
452                 if (data != NULL) {
453                         data->done_sigtest = TRUE;
454                         data->is_signed = TRUE;
455                         data->sigstatus = sigstat;
456                         if (data->ctx)
457                                 gpgme_release(data->ctx);
458                         data->ctx = ctx;
459                 }
460         } else
461                 gpgme_release(ctx);
462
463         return decinfo;
464
465 FILE_ERROR:
466         claws_fclose(dstfp);
467         g_free(fname);
468         gpgme_data_release(plain);
469         gpgme_release(ctx);
470         return NULL;
471 }
472
473 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account, const gchar *from_addr)
474 {
475         MimeInfo *msgcontent;
476         gchar *textstr, *tmp;
477         FILE *fp;
478         gchar *sigcontent;
479         gpgme_ctx_t ctx;
480         gpgme_data_t gpgtext, gpgsig;
481         size_t len;
482         gpgme_error_t err;
483         struct passphrase_cb_info_s info;
484         gpgme_sign_result_t result = NULL;
485
486         memset (&info, 0, sizeof info);
487
488         /* get content node from message */
489         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
490         if (msgcontent->type == MIMETYPE_MULTIPART) {
491                 if (!msgcontent->node->children) {
492                         debug_print("msgcontent->node->children NULL, bailing\n");
493                         privacy_set_error(_("Malformed message"));
494                         return FALSE;
495                 }
496                 msgcontent = (MimeInfo *) msgcontent->node->children->data;
497         }
498         /* get rid of quoted-printable or anything */
499         procmime_decode_content(msgcontent);
500
501         fp = my_tmpfile();
502         if (fp == NULL) {
503                 perror("my_tmpfile");
504                 privacy_set_error(_("Couldn't create temporary file, %s"), g_strerror(errno));
505                 return FALSE;
506         }
507         procmime_write_mimeinfo(msgcontent, fp);
508         rewind(fp);
509
510         /* read temporary file into memory */
511         textstr = file_read_stream_to_str_no_recode(fp);
512         
513         claws_fclose(fp);
514                 
515         gpgme_data_new_from_mem(&gpgtext, textstr, (size_t)strlen(textstr), 0);
516         gpgme_data_new(&gpgsig);
517         if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
518                 debug_print(("Couldn't initialize GPG context, %s\n"), gpgme_strerror(err));
519                 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
520                 return FALSE;
521         }
522         gpgme_set_textmode(ctx, 1);
523         gpgme_set_armor(ctx, 1);
524
525         if (!sgpgme_setup_signers(ctx, account, from_addr)) {
526                 gpgme_release(ctx);
527                 return FALSE;
528         }
529
530         prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
531         if (!g_getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
532                 info.c = ctx;
533                 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
534         }
535
536         err = gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR);
537         if (err != GPG_ERR_NO_ERROR) {
538                 if (err == GPG_ERR_CANCELED) {
539                         /* ignore cancelled signing */
540                         privacy_reset_error();
541                         debug_print("gpgme_op_sign cancelled\n");
542                 } else {
543                         privacy_set_error(_("Data signing failed, %s"), gpgme_strerror(err));
544                         debug_print("gpgme_op_sign error : %x\n", err);
545                 }
546                 gpgme_release(ctx);
547                 return FALSE;
548         }
549         result = gpgme_op_sign_result(ctx);
550         if (result && result->signatures) {
551                 gpgme_new_signature_t sig = result->signatures;
552                 while (sig) {
553                         debug_print("valid signature: %s\n", sig->fpr);
554                         sig = sig->next;
555                 }
556         } else if (result && result->invalid_signers) {
557                 gpgme_invalid_key_t invalid = result->invalid_signers;
558                 while (invalid) {
559                         g_warning("invalid signer: %s (%s)", invalid->fpr, 
560                                 gpgme_strerror(invalid->reason));
561                         privacy_set_error(_("Data signing failed due to invalid signer: %s"), 
562                                 gpgme_strerror(invalid->reason));
563                         invalid = invalid->next;
564                 }
565                 gpgme_release(ctx);
566                 return FALSE;
567         } else {
568                 /* can't get result (maybe no signing key?) */
569                 debug_print("gpgme_op_sign_result error\n");
570                 privacy_set_error(_("Data signing failed, no results."));
571                 gpgme_release(ctx);
572                 return FALSE;
573         }
574
575
576         sigcontent = sgpgme_data_release_and_get_mem(gpgsig, &len);
577         
578         if (sigcontent == NULL || len <= 0) {
579                 g_warning("sgpgme_data_release_and_get_mem failed");
580                 privacy_set_error(_("Data signing failed, no contents."));
581                 gpgme_data_release(gpgtext);
582                 g_free(textstr);
583                 g_free(sigcontent);
584                 gpgme_release(ctx);
585                 return FALSE;
586         }
587
588         tmp = g_malloc(len+1);
589         memmove(tmp, sigcontent, len+1);
590         tmp[len] = '\0';
591         gpgme_data_release(gpgtext);
592         g_free(textstr);
593         g_free(sigcontent);
594
595         if (msgcontent->content == MIMECONTENT_FILE &&
596             msgcontent->data.filename != NULL) {
597                 if (msgcontent->tmp == TRUE)
598                         claws_unlink(msgcontent->data.filename);
599                 g_free(msgcontent->data.filename);
600         }
601         msgcontent->data.mem = g_strdup(tmp);
602         msgcontent->content = MIMECONTENT_MEM;
603         g_free(tmp);
604
605         /* avoid all sorts of clear-signing problems with non ascii
606          * chars
607          */
608         procmime_encode_content(msgcontent, ENC_BASE64);
609         gpgme_release(ctx);
610
611         return TRUE;
612 }
613
614 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
615 {
616         return sgpgme_get_encrypt_data(recp_names, GPGME_PROTOCOL_OpenPGP);
617 }
618
619 static const gchar *pgpinline_get_encrypt_warning(void)
620 {
621         if (prefs_gpg_should_skip_encryption_warning(pgpinline_system.id))
622                 return NULL;
623         else
624                 return _("Please note that attachments are not encrypted by "
625                  "the PGP/Inline system, nor are email headers, like Subject.");
626 }
627
628 static void pgpinline_inhibit_encrypt_warning(gboolean inhibit)
629 {
630         if (inhibit)
631                 prefs_gpg_add_skip_encryption_warning(pgpinline_system.id);
632         else
633                 prefs_gpg_remove_skip_encryption_warning(pgpinline_system.id);
634 }
635
636 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
637 {
638         MimeInfo *msgcontent;
639         FILE *fp;
640         gchar *enccontent;
641         size_t len;
642         gchar *textstr, *tmp;
643         gpgme_data_t gpgtext, gpgenc;
644         gpgme_ctx_t ctx;
645         gpgme_key_t *kset = NULL;
646         gchar **fprs = g_strsplit(encrypt_data, " ", -1);
647         gpgme_error_t err;
648         gint i = 0;
649
650         while (fprs[i] && strlen(fprs[i])) {
651                 i++;
652         }
653         
654         kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
655         memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
656         if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
657                 debug_print(("Couldn't initialize GPG context, %s\n"), gpgme_strerror(err));
658                 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
659                 g_free(kset);
660                 return FALSE;
661         }
662         i = 0;
663         while (fprs[i] && strlen(fprs[i])) {
664                 gpgme_key_t key;
665                 err = gpgme_get_key(ctx, fprs[i], &key, 0);
666                 if (err) {
667                         debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
668                         privacy_set_error(_("Couldn't add GPG key %s, %s"), fprs[i], gpgme_strerror(err));
669                         g_free(kset);
670                         return FALSE;
671                 }
672                 debug_print("found %s at %d\n", fprs[i], i);
673                 kset[i] = key;
674                 i++;
675         }
676         
677
678         debug_print("Encrypting message content\n");
679
680         /* get content node from message */
681         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
682         if (msgcontent->type == MIMETYPE_MULTIPART) {
683                 if (!msgcontent->node->children) {
684                         debug_print("msgcontent->node->children NULL, bailing\n");
685                         privacy_set_error(_("Malformed message"));
686                         g_free(kset);
687                         return FALSE;
688                 }
689                 msgcontent = (MimeInfo *) msgcontent->node->children->data;
690         }
691         /* get rid of quoted-printable or anything */
692         procmime_decode_content(msgcontent);
693
694         fp = my_tmpfile();
695         if (fp == NULL) {
696                 privacy_set_error(_("Couldn't create temporary file, %s"), g_strerror(errno));
697                 perror("my_tmpfile");
698                 g_free(kset);
699                 return FALSE;
700         }
701         procmime_write_mimeinfo(msgcontent, fp);
702         rewind(fp);
703
704         /* read temporary file into memory */
705         textstr = file_read_stream_to_str_no_recode(fp);
706         
707         claws_fclose(fp);
708
709         /* encrypt data */
710         gpgme_data_new_from_mem(&gpgtext, textstr, (size_t)strlen(textstr), 0);
711         gpgme_data_new(&gpgenc);
712         if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
713                 debug_print(("Couldn't initialize GPG context, %s\n"), gpgme_strerror(err));
714                 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
715                 g_free(kset);
716                 return FALSE;
717         }
718         gpgme_set_armor(ctx, 1);
719
720         err = gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
721
722         enccontent = sgpgme_data_release_and_get_mem(gpgenc, &len);
723         g_free(kset);
724
725         if (enccontent == NULL || len <= 0) {
726                 g_warning("sgpgme_data_release_and_get_mem failed");
727                 privacy_set_error(_("Encryption failed, %s"), gpgme_strerror(err));
728                 gpgme_data_release(gpgtext);
729                 g_free(textstr);
730                 gpgme_release(ctx);
731                 g_free(enccontent);
732                 return FALSE;
733         }
734
735         tmp = g_malloc(len+1);
736         memmove(tmp, enccontent, len+1);
737         tmp[len] = '\0';
738         g_free(enccontent);
739
740         gpgme_data_release(gpgtext);
741         g_free(textstr);
742
743         if (msgcontent->content == MIMECONTENT_FILE &&
744             msgcontent->data.filename != NULL) {
745                 if (msgcontent->tmp == TRUE)
746                         claws_unlink(msgcontent->data.filename);
747                 g_free(msgcontent->data.filename);
748         }
749         msgcontent->data.mem = g_strdup(tmp);
750         msgcontent->content = MIMECONTENT_MEM;
751         g_free(tmp);
752         gpgme_release(ctx);
753
754         return TRUE;
755 }
756
757 static PrivacySystem pgpinline_system = {
758         "pgpinline",                    /* id */
759         "PGP Inline",                   /* name */
760
761         pgpinline_free_privacydata,     /* free_privacydata */
762
763         pgpinline_is_signed,            /* is_signed(MimeInfo *) */
764         pgpinline_check_signature,      /* check_signature(MimeInfo *) */
765         pgpinline_get_sig_status,       /* get_sig_status(MimeInfo *) */
766         pgpinline_get_sig_info_short,   /* get_sig_info_short(MimeInfo *) */
767         pgpinline_get_sig_info_full,    /* get_sig_info_full(MimeInfo *) */
768
769         pgpinline_is_encrypted,         /* is_encrypted(MimeInfo *) */
770         pgpinline_decrypt,              /* decrypt(MimeInfo *) */
771
772         TRUE,
773         pgpinline_sign,
774
775         TRUE,
776         pgpinline_get_encrypt_data,
777         pgpinline_encrypt,
778         pgpinline_get_encrypt_warning,
779         pgpinline_inhibit_encrypt_warning,
780         prefs_gpg_auto_check_signatures,
781 };
782
783 void pgpinline_init()
784 {
785         privacy_register_system(&pgpinline_system);
786 }
787
788 void pgpinline_done()
789 {
790         privacy_unregister_system(&pgpinline_system);
791 }
792
793 struct PluginFeature *plugin_provides(void)
794 {
795         static struct PluginFeature features[] = 
796                 { {PLUGIN_PRIVACY, N_("PGP/Inline")},
797                   {PLUGIN_NOTHING, NULL}};
798         return features;
799 }
800 #endif /* USE_GPGME */