+/*
+ * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
+ * Copyright (C) 1999-2003 Hiroyuki Yamamoto & the Sylpheed-Claws team
+ * This file (C) 2004 Colin Leroy <colin@colino.net>
+ *
+ * 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 "pgpinline.h"
+#include <plugins/pgpcore/sgpgme.h>
+#include <plugins/pgpcore/prefs_gpg.h>
+#include <plugins/pgpcore/passphrase.h>
+#include "quoted-printable.h"
+#include "base64.h"
+#include "codeconv.h"
+
+extern struct GPGConfig prefs_gpg;
+
+typedef struct _PrivacyDataPGP PrivacyDataPGP;
+
+struct _PrivacyDataPGP
+{
+ PrivacyData data;
+
+ gboolean done_sigtest;
+ gboolean is_signed;
+ gpgme_verify_result_t sigstatus;
+ gpgme_ctx_t ctx;
+};
+
+static PrivacySystem pgpinline_system;
+
+static gint pgpinline_check_signature(MimeInfo *mimeinfo);
+
+static PrivacyDataPGP *pgpinline_new_privacydata()
+{
+ PrivacyDataPGP *data;
+
+ data = g_new0(PrivacyDataPGP, 1);
+ data->data.system = &pgpinline_system;
+ data->done_sigtest = FALSE;
+ data->is_signed = FALSE;
+ data->sigstatus = NULL;
+ gpgme_new(&data->ctx);
+
+ return data;
+}
+
+static void pgpinline_free_privacydata(PrivacyData *_data)
+{
+ PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
+ gpgme_release(data->ctx);
+ g_free(data);
+}
+
+static gchar *get_part_as_string(MimeInfo *mimeinfo)
+{
+ gchar *textdata = NULL;
+
+ g_return_val_if_fail(mimeinfo != NULL, 0);
+ procmime_decode_content(mimeinfo);
+ if (mimeinfo->content == MIMECONTENT_MEM)
+ textdata = g_strdup(mimeinfo->data.mem);
+ else
+ textdata = file_read_to_str(mimeinfo->data.filename);
+
+ return textdata;
+}
+
+static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
+{
+ PrivacyDataPGP *data = NULL;
+ const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
+ gchar *textdata, *sigpos;
+
+ g_return_val_if_fail(mimeinfo != NULL, FALSE);
+
+ if (procmime_mimeinfo_parent(mimeinfo) == NULL)
+ return FALSE; /* not parent */
+
+ if (mimeinfo->type != MIMETYPE_TEXT)
+ return FALSE;
+
+ if (mimeinfo->privacy != NULL) {
+ data = (PrivacyDataPGP *) mimeinfo->privacy;
+ if (data->done_sigtest)
+ return data->is_signed;
+ }
+
+ textdata = get_part_as_string(mimeinfo);
+ if (!textdata)
+ return FALSE;
+
+ if (data == NULL) {
+ data = pgpinline_new_privacydata();
+ mimeinfo->privacy = (PrivacyData *) data;
+ }
+ data->done_sigtest = TRUE;
+ data->is_signed = FALSE;
+
+ if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
+ g_free(textdata);
+ return FALSE;
+ }
+
+ if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
+ g_free(textdata);
+ return FALSE;
+ }
+
+ g_free(textdata);
+
+ data->is_signed = TRUE;
+
+ return TRUE;
+}
+
+static gint pgpinline_check_signature(MimeInfo *mimeinfo)
+{
+ PrivacyDataPGP *data = NULL;
+ gchar *textdata = NULL, *tmp = NULL;
+ gpgme_data_t plain = NULL, cipher = NULL;
+ gpgme_ctx_t ctx;
+
+ g_return_val_if_fail(mimeinfo != NULL, 0);
+
+ if (procmime_mimeinfo_parent(mimeinfo) == NULL)
+ return 0; /* not parent */
+ if (mimeinfo->type != MIMETYPE_TEXT)
+ return 0;
+
+ g_return_val_if_fail(mimeinfo->privacy != NULL, 0);
+ data = (PrivacyDataPGP *) mimeinfo->privacy;
+
+ textdata = get_part_as_string(mimeinfo);
+
+ if (!textdata) {
+ g_free(textdata);
+ return 0;
+ }
+
+ /* gtk2: convert back from utf8 */
+ tmp = conv_codeset_strdup(textdata, CS_UTF_8,
+ procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
+ g_free(textdata);
+ textdata = g_strdup(tmp);
+ g_free(tmp);
+
+ gpgme_new(&ctx);
+ gpgme_set_textmode(ctx, 1);
+ gpgme_set_armor(ctx, 1);
+
+ gpgme_data_new_from_mem(&plain, textdata, strlen(textdata), 1);
+ gpgme_data_new(&cipher);
+
+ data->sigstatus = sgpgme_verify_signature(ctx, plain, NULL, cipher);
+
+ gpgme_data_release(plain);
+ gpgme_data_release(cipher);
+
+ g_free(textdata);
+
+ return 0;
+}
+
+static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
+{
+ PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
+
+ g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
+
+ if (data->sigstatus == NULL &&
+ prefs_gpg_get_config()->auto_check_signatures)
+ pgpinline_check_signature(mimeinfo);
+
+ return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
+}
+
+static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
+{
+ PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
+
+ g_return_val_if_fail(data != NULL, g_strdup("Error"));
+
+ if (data->sigstatus == NULL &&
+ prefs_gpg_get_config()->auto_check_signatures)
+ pgpinline_check_signature(mimeinfo);
+
+ return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
+}
+
+static gchar *pgpinline_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 pgpinline_is_encrypted(MimeInfo *mimeinfo)
+{
+ const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
+ gchar *textdata;
+
+ g_return_val_if_fail(mimeinfo != NULL, FALSE);
+
+ if (procmime_mimeinfo_parent(mimeinfo) == NULL)
+ return FALSE; /* not parent */
+
+ if (mimeinfo->type != MIMETYPE_TEXT)
+ return FALSE;
+
+ textdata = get_part_as_string(mimeinfo);
+ if (!textdata)
+ return FALSE;
+
+ if (!strstr(textdata, enc_indicator)) {
+ g_free(textdata);
+ return FALSE;
+ }
+
+ g_free(textdata);
+ return TRUE;
+}
+
+static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
+{
+ MimeInfo *decinfo, *parseinfo;
+ gpgme_data_t cipher, plain;
+ FILE *dstfp;
+ gchar *fname;
+ gchar *textdata = NULL;
+ static gint id = 0;
+ const gchar *src_codeset = NULL;
+ gpgme_verify_result_t sigstat = 0;
+ PrivacyDataPGP *data = NULL;
+ gpgme_ctx_t ctx;
+ gchar *chars;
+ int len;
+
+ if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
+ return NULL;
+
+ gpgme_set_textmode(ctx, 1);
+ gpgme_set_armor(ctx, 1);
+
+ g_return_val_if_fail(mimeinfo != NULL, NULL);
+ g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
+
+ if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
+ mimeinfo->type != MIMETYPE_TEXT) {
+ gpgme_release(ctx);
+ return NULL;
+ }
+
+ textdata = get_part_as_string(mimeinfo);
+ if (!textdata) {
+ gpgme_release(ctx);
+ return NULL;
+ }
+
+ debug_print("decrypting '%s'\n", textdata);
+ gpgme_data_new_from_mem(&cipher, textdata, strlen(textdata), 1);
+
+ plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
+ if (sigstat && !sigstat->signatures)
+ sigstat = NULL;
+
+ gpgme_data_release(cipher);
+
+ if (plain == NULL) {
+ gpgme_release(ctx);
+ 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);
+ gpgme_release(ctx);
+ return NULL;
+ }
+
+ src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
+ if (src_codeset == NULL)
+ src_codeset = CS_ISO_8859_1;
+
+ fprintf(dstfp, "MIME-Version: 1.0\r\n"
+ "Content-Type: text/plain; charset=%s\r\n"
+ "Content-Transfer-Encoding: 8bit\r\n"
+ "\r\n",
+ src_codeset);
+
+ chars = gpgme_data_release_and_get_mem(plain, &len);
+ if (len > 0)
+ fwrite(chars, len, 1, dstfp);
+
+ fclose(dstfp);
+
+ gpgme_data_release(plain);
+
+ parseinfo = procmime_scan_file(fname);
+ g_free(fname);
+
+ if (parseinfo == NULL) {
+ gpgme_release(ctx);
+ return NULL;
+ }
+ decinfo = g_node_first_child(parseinfo->node) != NULL ?
+ g_node_first_child(parseinfo->node)->data : NULL;
+
+ if (decinfo == NULL) {
+ gpgme_release(ctx);
+ return NULL;
+ }
+
+ g_node_unlink(decinfo->node);
+ procmime_mimeinfo_free_all(parseinfo);
+
+ decinfo->tmp = TRUE;
+
+ if (sigstat != GPGME_SIG_STAT_NONE) {
+ if (decinfo->privacy != NULL) {
+ data = (PrivacyDataPGP *) decinfo->privacy;
+ } else {
+ data = pgpinline_new_privacydata();
+ decinfo->privacy = (PrivacyData *) data;
+ }
+ data->done_sigtest = TRUE;
+ data->is_signed = TRUE;
+ data->sigstatus = sigstat;
+ if (data->ctx)
+ gpgme_release(data->ctx);
+ data->ctx = ctx;
+ } else
+ gpgme_release(ctx);
+
+ return decinfo;
+}
+
+static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
+{
+ MimeInfo *msgcontent;
+ gchar *textstr, *tmp;
+ FILE *fp;
+ gchar *sigcontent;
+ gpgme_ctx_t ctx;
+ gpgme_data_t gpgtext, gpgsig;
+ guint len;
+ struct passphrase_cb_info_s info;
+
+ memset (&info, 0, sizeof info);
+
+ /* get content node from message */
+ msgcontent = (MimeInfo *) mimeinfo->node->children->data;
+ if (msgcontent->type == MIMETYPE_MULTIPART)
+ msgcontent = (MimeInfo *) msgcontent->node->children->data;
+
+ /* get rid of quoted-printable or anything */
+ procmime_decode_content(msgcontent);
+
+ fp = my_tmpfile();
+ procmime_write_mimeinfo(msgcontent, fp);
+ rewind(fp);
+
+ /* read temporary file into memory */
+ textstr = file_read_stream_to_str(fp);
+
+ /* gtk2: convert back from utf8 */
+ tmp = conv_codeset_strdup(textstr, CS_UTF_8,
+ procmime_mimeinfo_get_parameter(msgcontent, "charset"));
+ g_free(textstr);
+ textstr = g_strdup(tmp);
+ g_free(tmp);
+
+ fclose(fp);
+
+ gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
+ gpgme_data_new(&gpgsig);
+ gpgme_new(&ctx);
+ gpgme_set_textmode(ctx, 1);
+ gpgme_set_armor(ctx, 1);
+
+ if (!sgpgme_setup_signers(ctx, account)) {
+ gpgme_release(ctx);
+ return FALSE;
+ }
+
+ if (!getenv("GPG_AGENT_INFO")) {
+ info.c = ctx;
+ gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
+ }
+
+ if (gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR)
+ != GPG_ERR_NO_ERROR) {
+ gpgme_release(ctx);
+ return FALSE;
+ }
+
+ gpgme_release(ctx);
+ sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
+ tmp = g_malloc(len+1);
+ g_memmove(tmp, sigcontent, len+1);
+ tmp[len] = '\0';
+ gpgme_data_release(gpgtext);
+ g_free(textstr);
+ g_free(sigcontent);
+
+ if (msgcontent->content == MIMECONTENT_FILE &&
+ msgcontent->data.filename != NULL) {
+ unlink(msgcontent->data.filename);
+ g_free(msgcontent->data.filename);
+ }
+ msgcontent->data.mem = g_strdup(tmp);
+ msgcontent->content = MIMECONTENT_MEM;
+ g_free(tmp);
+
+ /* avoid all sorts of clear-signing problems with non ascii
+ * chars
+ */
+ procmime_encode_content(msgcontent, ENC_BASE64);
+
+ return TRUE;
+}
+
+static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
+{
+ return sgpgme_get_encrypt_data(recp_names);
+}
+
+static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
+{
+ MimeInfo *msgcontent;
+ FILE *fp;
+ gchar *enccontent;
+ guint len;
+ gchar *textstr, *tmp;
+ gpgme_data_t gpgtext, gpgenc;
+ gpgme_ctx_t ctx;
+ gpgme_key_t *kset = NULL;
+ gchar **fprs = g_strsplit(encrypt_data, " ", -1);
+ gint i = 0;
+ while (fprs[i] && strlen(fprs[i])) {
+ i++;
+ }
+
+ kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
+ memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
+ gpgme_new(&ctx);
+ i = 0;
+ while (fprs[i] && strlen(fprs[i])) {
+ gpgme_key_t key;
+ gpgme_error_t err;
+ err = gpgme_get_key(ctx, fprs[i], &key, 0);
+ if (err) {
+ debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
+ break;
+ }
+ debug_print("found %s at %d\n", fprs[i], i);
+ kset[i] = key;
+ i++;
+ }
+
+
+ debug_print("Encrypting message content\n");
+
+ /* get content node from message */
+ msgcontent = (MimeInfo *) mimeinfo->node->children->data;
+ if (msgcontent->type == MIMETYPE_MULTIPART)
+ msgcontent = (MimeInfo *) msgcontent->node->children->data;
+
+ /* get rid of quoted-printable or anything */
+ procmime_decode_content(msgcontent);
+
+ fp = my_tmpfile();
+ procmime_write_mimeinfo(msgcontent, fp);
+ rewind(fp);
+
+ /* read temporary file into memory */
+ textstr = file_read_stream_to_str(fp);
+
+ /* gtk2: convert back from utf8 */
+ tmp = conv_codeset_strdup(textstr, CS_UTF_8,
+ procmime_mimeinfo_get_parameter(msgcontent, "charset"));
+ g_free(textstr);
+ textstr = g_strdup(tmp);
+ g_free(tmp);
+ fclose(fp);
+
+ /* encrypt data */
+ gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
+ gpgme_data_new(&gpgenc);
+ gpgme_new(&ctx);
+ gpgme_set_armor(ctx, 1);
+
+ gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
+
+ gpgme_release(ctx);
+ enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
+
+ tmp = g_malloc(len+1);
+ g_memmove(tmp, enccontent, len+1);
+ tmp[len] = '\0';
+ g_free(enccontent);
+
+ gpgme_data_release(gpgtext);
+ g_free(textstr);
+
+ if (msgcontent->content == MIMECONTENT_FILE &&
+ msgcontent->data.filename != NULL) {
+ unlink(msgcontent->data.filename);
+ g_free(msgcontent->data.filename);
+ }
+ msgcontent->data.mem = g_strdup(tmp);
+ msgcontent->content = MIMECONTENT_MEM;
+ g_free(tmp);
+
+ return TRUE;
+}
+
+static PrivacySystem pgpinline_system = {
+ "pgpinline", /* id */
+ "PGP Inline", /* name */
+
+ pgpinline_free_privacydata, /* free_privacydata */
+
+ pgpinline_is_signed, /* is_signed(MimeInfo *) */
+ pgpinline_check_signature, /* check_signature(MimeInfo *) */
+ pgpinline_get_sig_status, /* get_sig_status(MimeInfo *) */
+ pgpinline_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
+ pgpinline_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
+
+ pgpinline_is_encrypted, /* is_encrypted(MimeInfo *) */
+ pgpinline_decrypt, /* decrypt(MimeInfo *) */
+
+ TRUE,
+ pgpinline_sign,
+
+ TRUE,
+ pgpinline_get_encrypt_data,
+ pgpinline_encrypt,
+};
+
+void pgpinline_init()
+{
+ privacy_register_system(&pgpinline_system);
+}
+
+void pgpinline_done()
+{
+ privacy_unregister_system(&pgpinline_system);
+}
+
+#endif /* USE_GPGME */
projects / claws.git / commitdiff