+++ /dev/null
-/*
- * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2003 Hiroyuki Yamamoto & the Sylpheed-Claws team
- *
- * This program 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.
- *
- * This program 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.
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#ifdef USE_GPGME
-
-#include "defs.h"
-#include <glib.h>
-#include <gpgme.h>
-
-#include "utils.h"
-#include "privacy.h"
-#include "procmime.h"
-#include "pgpmime.h"
-#include "sgpgme.h"
-#include "prefs_common.h"
-
-typedef struct _PrivacyDataPGP PrivacyDataPGP;
-
-struct _PrivacyDataPGP
-{
- PrivacyData data;
-
- gboolean done_sigtest;
- gboolean is_signed;
- GpgmeSigStat sigstatus;
- GpgmeCtx ctx;
-};
-
-static PrivacySystem pgpmime_system;
-
-static gint pgpmime_check_signature(MimeInfo *mimeinfo);
-
-static PrivacyDataPGP *pgpmime_new_privacydata()
-{
- PrivacyDataPGP *data;
-
- data = g_new0(PrivacyDataPGP, 1);
- data->data.system = &pgpmime_system;
- data->done_sigtest = FALSE;
- data->is_signed = FALSE;
- data->sigstatus = GPGME_SIG_STAT_NONE;
- gpgme_new(&data->ctx);
-
- return data;
-}
-
-static void pgpmime_free_privacydata(PrivacyData *_data)
-{
- PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
-
- g_free(data);
-}
-
-static gboolean pgpmime_is_signed(MimeInfo *mimeinfo)
-{
- MimeInfo *parent;
- MimeInfo *signature;
- const gchar *protocol;
- PrivacyDataPGP *data = NULL;
-
- g_return_val_if_fail(mimeinfo != NULL, FALSE);
- if (mimeinfo->privacy != NULL) {
- data = (PrivacyDataPGP *) mimeinfo->privacy;
- if (data->done_sigtest)
- return data->is_signed;
- }
-
- /* check parent */
- parent = procmime_mimeinfo_parent(mimeinfo);
- if (parent == NULL)
- return FALSE;
- if ((parent->type != MIMETYPE_MULTIPART) ||
- g_strcasecmp(parent->subtype, "signed"))
- return FALSE;
- protocol = procmime_mimeinfo_get_parameter(parent, "protocol");
- if ((protocol == NULL) || g_strcasecmp(protocol, "application/pgp-signature"))
- return FALSE;
-
- /* check if mimeinfo is the first child */
- if (parent->node->children->data != mimeinfo)
- return FALSE;
-
- /* check signature */
- signature = parent->node->children->next != NULL ?
- (MimeInfo *) parent->node->children->next->data : NULL;
- if (signature == NULL)
- return FALSE;
- if ((signature->type != MIMETYPE_APPLICATION) ||
- g_strcasecmp(signature->subtype, "pgp-signature"))
- return FALSE;
-
- if (data == NULL) {
- data = pgpmime_new_privacydata();
- mimeinfo->privacy = (PrivacyData *) data;
- }
- data->done_sigtest = TRUE;
- data->is_signed = TRUE;
-
- if (prefs_common.auto_check_signatures)
- pgpmime_check_signature(mimeinfo);
-
- return TRUE;
-}
-
-static gint pgpmime_check_signature(MimeInfo *mimeinfo)
-{
- PrivacyDataPGP *data;
- MimeInfo *parent, *signature;
- FILE *fp;
- gchar buf[BUFFSIZE];
- gchar *boundary;
- GString *textstr;
- gint boundary_len;
- GpgmeData sigdata, textdata;
-
- g_return_val_if_fail(mimeinfo != NULL, -1);
- g_return_val_if_fail(mimeinfo->privacy != NULL, -1);
- data = (PrivacyDataPGP *) mimeinfo->privacy;
-
- debug_print("Checking PGP/MIME signature\n");
- parent = procmime_mimeinfo_parent(mimeinfo);
-
- fp = fopen(parent->filename, "rb");
- g_return_val_if_fail(fp != NULL, SIGNATURE_INVALID);
-
- boundary = g_hash_table_lookup(parent->parameters, "boundary");
- boundary_len = strlen(boundary);
- while (fgets(buf, sizeof(buf), fp) != NULL)
- if (IS_BOUNDARY(buf, boundary, boundary_len))
- break;
-
- textstr = g_string_new("");
- while (fgets(buf, sizeof(buf), fp) != NULL) {
- gchar *buf2;
-
- if (IS_BOUNDARY(buf, boundary, boundary_len))
- break;
-
- buf2 = canonicalize_str(buf);
- g_string_append(textstr, buf2);
- g_free(buf2);
- }
- g_string_truncate(textstr, textstr->len - 2);
-
- gpgme_data_new_from_mem(&textdata, textstr->str, textstr->len, 0);
- signature = (MimeInfo *) mimeinfo->node->next->data;
- sigdata = sgpgme_data_from_mimeinfo(signature);
-
- data->sigstatus =
- sgpgme_verify_signature (data->ctx, sigdata, textdata);
-
- gpgme_data_release(sigdata);
- gpgme_data_release(textdata);
- g_string_free(textstr, TRUE);
- fclose(fp);
-
- return 0;
-}
-
-static SignatureStatus pgpmime_get_sig_status(MimeInfo *mimeinfo)
-{
- PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
-
- g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
-
- return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
-}
-
-static gchar *pgpmime_get_sig_info_short(MimeInfo *mimeinfo)
-{
- PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
-
- g_return_val_if_fail(data != NULL, g_strdup("Error"));
-
- return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
-}
-
-static gchar *pgpmime_get_sig_info_full(MimeInfo *mimeinfo)
-{
- PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
-
- g_return_val_if_fail(data != NULL, g_strdup("Error"));
-
- return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
-}
-
-static gboolean pgpmime_is_encrypted(MimeInfo *mimeinfo)
-{
- MimeInfo *tmpinfo;
- const gchar *tmpstr;
-
- if (mimeinfo->type != MIMETYPE_MULTIPART)
- return FALSE;
- if (g_strcasecmp(mimeinfo->subtype, "encrypted"))
- return FALSE;
- tmpstr = procmime_mimeinfo_get_parameter(mimeinfo, "protocol");
- if ((tmpstr == NULL) || g_strcasecmp(tmpstr, "application/pgp-encrypted"))
- return FALSE;
- if (g_node_n_children(mimeinfo->node) != 2)
- return FALSE;
-
- tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 0)->data;
- if (tmpinfo->type != MIMETYPE_APPLICATION)
- return FALSE;
- if (g_strcasecmp(tmpinfo->subtype, "pgp-encrypted"))
- return FALSE;
-
- tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
- if (tmpinfo->type != MIMETYPE_APPLICATION)
- return FALSE;
- if (g_strcasecmp(tmpinfo->subtype, "octet-stream"))
- return FALSE;
-
- return TRUE;
-}
-
-static MimeInfo *pgpmime_decrypt(MimeInfo *mimeinfo)
-{
- MimeInfo *encinfo, *decinfo, *parseinfo;
- GpgmeData cipher, plain;
- static gint id = 0;
- FILE *dstfp;
- gint nread;
- gchar *fname;
- gchar buf[BUFFSIZE];
-
- g_return_val_if_fail(pgpmime_is_encrypted(mimeinfo), NULL);
-
- encinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
-
- cipher = sgpgme_data_from_mimeinfo(encinfo);
- plain = sgpgme_decrypt(cipher);
- gpgme_data_release(cipher);
- if (plain == NULL)
- return NULL;
-
- fname = g_strdup_printf("%s%cplaintext.%08x",
- get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
-
- if ((dstfp = fopen(fname, "wb")) == NULL) {
- FILE_OP_ERROR(fname, "fopen");
- g_free(fname);
- gpgme_data_release(plain);
- return NULL;
- }
-
- fprintf(dstfp, "MIME-Version: 1.0\n");
- gpgme_data_rewind (plain);
- while (gpgme_data_read(plain, buf, sizeof(buf), &nread) == GPGME_No_Error) {
- fwrite (buf, nread, 1, dstfp);
- }
- fclose(dstfp);
-
- gpgme_data_release(plain);
-
- parseinfo = procmime_scan_file(fname);
- g_free(fname);
- if (parseinfo == NULL)
- return NULL;
- decinfo = g_node_first_child(parseinfo->node) != NULL ?
- g_node_first_child(parseinfo->node)->data : NULL;
- if (decinfo == NULL)
- return NULL;
-
- g_node_unlink(decinfo->node);
- procmime_mimeinfo_free_all(parseinfo);
-
- decinfo->tmpfile = TRUE;
-
- return decinfo;
-}
-
-static PrivacySystem pgpmime_system = {
- "pgpmime", /* id */
- "PGP/Mime", /* name */
-
- pgpmime_free_privacydata, /* free_privacydata */
-
- pgpmime_is_signed, /* is_signed(MimeInfo *) */
- pgpmime_check_signature, /* check_signature(MimeInfo *) */
- pgpmime_get_sig_status, /* get_sig_status(MimeInfo *) */
- pgpmime_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
- pgpmime_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
-
- pgpmime_is_encrypted, /* is_encrypted(MimeInfo *) */
- pgpmime_decrypt, /* decrypt(MimeInfo *) */
-};
-
-void pgpmime_init()
-{
- privacy_register_system(&pgpmime_system);
-}
-
-void pgpmime_done()
-{
- privacy_unregister_system(&pgpmime_system);
-}
-
-#endif /* USE_GPGME */