+/*
+ * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
+ * Copyright (C) 2016 The Claws Mail 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#include "claws-features.h"
+#endif
+
+#ifdef PASSWORD_CRYPTO_GNUTLS
+# include <gnutls/gnutls.h>
+# include <gnutls/crypto.h>
+#endif
+
+#include <glib.h>
+#include <glib/gi18n.h>
+
+#include "common/defs.h"
+#include "common/utils.h"
+#include "passwordstore.h"
+#include "password.h"
+#include "prefs_gtk.h"
+
+static GSList *_password_store;
+
+/* Finds password block of given type and name in the pwdstore. */
+static PasswordBlock *_get_block(PasswordBlockType block_type,
+ const gchar *block_name)
+{
+ GSList *item;
+ PasswordBlock *block;
+
+ g_return_val_if_fail(block_type >= 0 && block_type < NUM_PWS_TYPES,
+ NULL);
+ g_return_val_if_fail(block_name != NULL, NULL);
+
+ for (item = _password_store; item != NULL; item = item->next) {
+ block = (PasswordBlock *)item->data;
+ if (block->block_type == block_type &&
+ !strcmp(block->block_name, block_name))
+ return block;
+ }
+
+ return NULL;
+}
+
+static gboolean _hash_equal_func(gconstpointer a, gconstpointer b)
+{
+ if (g_strcmp0((const gchar *)a, (const gchar *)b) == 0)
+ return TRUE;
+ return FALSE;
+}
+
+/* Creates a new, empty block and adds it to the pwdstore. */
+static PasswordBlock *_new_block(PasswordBlockType block_type,
+ const gchar *block_name)
+{
+ PasswordBlock *block;
+
+ g_return_val_if_fail(block_type >= 0 && block_type < NUM_PWS_TYPES,
+ NULL);
+ g_return_val_if_fail(block_name != NULL, NULL);
+
+ /* First check to see if the block doesn't already exist. */
+ if (_get_block(block_type, block_name)) {
+ debug_print("Block (%d/%s) already exists.\n",
+ block_type, block_name);
+ return NULL;
+ }
+
+ /* Let's create an empty block, and add it to pwdstore. */
+ block = g_new0(PasswordBlock, 1);
+ block->block_type = block_type;
+ block->block_name = g_strdup(block_name);
+ block->entries = g_hash_table_new_full(g_str_hash,
+ (GEqualFunc)_hash_equal_func,
+ g_free, g_free);
+ debug_print("Created password block (%d/%s)\n",
+ block_type, block_name);
+
+ _password_store = g_slist_append(_password_store, block);
+
+ return block;
+}
+
+///////////////////////////////////////////////////////////////
+
+/* Stores a password. */
+gboolean passwd_store_set(PasswordBlockType block_type,
+ const gchar *block_name,
+ const gchar *password_id,
+ const gchar *password,
+ gboolean encrypted)
+{
+ PasswordBlock *block;
+ gchar *encrypted_password;
+
+ g_return_val_if_fail(block_type >= 0 && block_type < NUM_PWS_TYPES,
+ FALSE);
+ g_return_val_if_fail(block_name != NULL, FALSE);
+ g_return_val_if_fail(password_id != NULL, FALSE);
+
+ debug_print("%s password '%s' in block (%d/%s)%s\n",
+ (password == NULL ? "Deleting" : "Storing"),
+ password_id, block_type, block_name,
+ (encrypted ? ", already encrypted" : "") );
+
+ // find correct block (create if needed)
+ if ((block = _get_block(block_type, block_name)) == NULL &&
+ (block = _new_block(block_type, block_name)) == NULL) {
+ debug_print("Could not create password block (%d/%s)\n",
+ block_type, block_name);
+ return FALSE;
+ }
+
+ if (password == NULL) {
+ /* NULL password was passed to us, so delete the entry with
+ * corresponding id */
+ g_hash_table_remove(block->entries, password_id);
+ } else {
+ if (!encrypted) {
+ /* encrypt password before saving it */
+ if ((encrypted_password =
+ password_encrypt(password, NULL)) == NULL) {
+ debug_print("Could not encrypt password '%s' for block (%d/%s).\n",
+ password_id, block_type, block_name);
+ return FALSE;
+ }
+ } else {
+ /* password is already in encrypted form already */
+ encrypted_password = g_strdup(password);
+ }
+
+ // add encrypted password to the block
+ g_hash_table_insert(block->entries,
+ g_strdup(password_id),
+ encrypted_password);
+ }
+
+ return TRUE;
+}
+
+/* Retrieves a password. */
+gchar *passwd_store_get(PasswordBlockType block_type,
+ const gchar *block_name,
+ const gchar *password_id)
+{
+ PasswordBlock *block;
+ gchar *encrypted_password, *password;
+
+ g_return_val_if_fail(block_type >= 0 && block_type < NUM_PWS_TYPES,
+ NULL);
+ g_return_val_if_fail(block_name != NULL, NULL);
+ g_return_val_if_fail(password_id != NULL, NULL);
+
+ debug_print("Getting password '%s' from block (%d/%s)\n",
+ password_id, block_type, block_name);
+
+ // find correct block
+ if ((block = _get_block(block_type, block_name)) == NULL) {
+ debug_print("Block (%d/%s) not found.\n", block_type, block_name);
+ return NULL;
+ }
+
+ // grab pointer to encrypted password
+ if ((encrypted_password =
+ g_hash_table_lookup(block->entries, password_id)) == NULL) {
+ debug_print("Password '%s' in block (%d/%s) not found.\n",
+ password_id, block_type, block_name);
+ return NULL;
+ }
+
+ // decrypt password
+ if ((password =
+ password_decrypt(encrypted_password, NULL)) == NULL) {
+ debug_print("Could not decrypt password '%s' for block (%d/%s).\n",
+ password_id, block_type, block_name);
+ return NULL;
+ }
+
+ // return decrypted password
+ return password;
+}
+
+/* Reencrypts all stored passwords. */
+void passwd_store_reencrypt_all(const gchar *old_mpwd,
+ const gchar *new_mpwd)
+{
+ PasswordBlock *block;
+ GSList *item;
+ GList *keys, *eitem;
+ gchar *encrypted_password, *decrypted_password, *key;
+
+ g_return_if_fail(old_mpwd != NULL);
+ g_return_if_fail(new_mpwd != NULL);
+
+ for (item = _password_store; item != NULL; item = item->next) {
+ block = (PasswordBlock *)item->data;
+ if (block == NULL)
+ continue; /* Just in case. */
+
+ debug_print("Reencrypting passwords in block (%d/%s).\n",
+ block->block_type, block->block_name);
+
+ if (g_hash_table_size(block->entries) == 0)
+ continue;
+
+ keys = g_hash_table_get_keys(block->entries);
+ for (eitem = keys; eitem != NULL; eitem = eitem->next) {
+ key = (gchar *)eitem->data;
+ if ((encrypted_password =
+ g_hash_table_lookup(block->entries, key)) == NULL)
+ continue;
+
+ if ((decrypted_password =
+ password_decrypt(encrypted_password, old_mpwd)) == NULL) {
+ debug_print("Reencrypt: couldn't decrypt password for '%s'.\n", key);
+ continue;
+ }
+
+ encrypted_password = password_encrypt(decrypted_password, new_mpwd);
+ memset(decrypted_password, 0, strlen(decrypted_password));
+ g_free(decrypted_password);
+ if (encrypted_password == NULL) {
+ debug_print("Reencrypt: couldn't encrypt password for '%s'.\n", key);
+ continue;
+ }
+
+ g_hash_table_insert(block->entries, g_strdup(key), encrypted_password);
+ }
+
+ g_list_free(keys);
+ }
+
+ debug_print("Reencrypting done.\n");
+}
+
+static gint _write_to_file(FILE *fp)
+{
+ PasswordBlock *block;
+ GSList *item;
+ GList *keys, *eitem;
+ gchar *typestr, *line, *key, *pwd;
+
+ for (item = _password_store; item != NULL; item = item->next) {
+ block = (PasswordBlock*)item->data;
+ if (block == NULL)
+ continue; /* Just in case. */
+
+ /* Do not save empty blocks. */
+ if (g_hash_table_size(block->entries) == 0)
+ continue;
+
+ /* Prepare the section header string and write it out. */
+ typestr = NULL;
+ if (block->block_type == PWS_CORE) {
+ typestr = "core";
+ } else if (block->block_type == PWS_ACCOUNT) {
+ typestr = "account";
+ } else if (block->block_type == PWS_PLUGIN) {
+ typestr = "plugin";
+ }
+ line = g_strdup_printf("[%s:%s]\n", typestr, block->block_name);
+
+ if (fputs(line, fp) == EOF) {
+ FILE_OP_ERROR("password store", "fputs");
+ g_free(line);
+ return -1;
+ }
+ g_free(line);
+
+ /* Now go through all passwords in the block and write each out. */
+ keys = g_hash_table_get_keys(block->entries);
+ for (eitem = keys; eitem != NULL; eitem = eitem->next) {
+ key = (gchar *)eitem->data;
+ if ((pwd = g_hash_table_lookup(block->entries, key)) == NULL)
+ continue;
+
+ line = g_strdup_printf("%s %s\n", key, pwd);
+ if (fputs(line, fp) == EOF) {
+ FILE_OP_ERROR("password store", "fputs");
+ g_free(line);
+ return -1;
+ }
+ g_free(line);
+ }
+ g_list_free(keys);
+
+ if (item->next != NULL && fputs("\n", fp) == EOF) {
+ FILE_OP_ERROR("password store", "fputs");
+ return -1;
+ }
+
+ }
+
+ return 1;
+}
+
+void passwd_store_write_config(void)
+{
+ gchar *rcpath;
+ PrefFile *pfile;
+
+ debug_print("Writing password store...\n");
+
+ rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
+ PASSWORD_STORE_RC, NULL);
+
+ if ((pfile = prefs_write_open(rcpath)) == NULL) {
+ g_warning("failed to open password store file for writing");
+ g_free(rcpath);
+ return;
+ }
+
+ g_free(rcpath);
+
+ if (_write_to_file(pfile->fp) < 0) {
+ g_warning("failed to write password store to file");
+ prefs_file_close_revert(pfile);
+ } else if (prefs_file_close(pfile) < 0) {
+ g_warning("failed to properly close password store file after writing");
+ }
+}
+
+void passwd_store_read_config(void)
+{
+ gchar *rcpath, *contents, **lines, **line, *typestr, *name;
+ GError *error = NULL;
+ guint i = 0;
+ PasswordBlock *block = NULL;
+ PasswordBlockType type;
+
+ // TODO: passwd_store_clear();
+
+ debug_print("Reading password store from file...\n");
+
+ rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
+ PASSWORD_STORE_RC, NULL);
+
+ if (!g_file_get_contents(rcpath, &contents, NULL, &error)) {
+ g_warning("couldn't read password store from file: %s\n", error->message);
+ g_error_free(error);
+ g_free(rcpath);
+ return;
+ }
+ g_free(rcpath);
+
+ lines = g_strsplit(contents, "\n", -1);
+
+ while (lines[i] != NULL) {
+ if (*lines[i] == '[') {
+ /* Beginning of a new block */
+ line = g_strsplit_set(lines[i], "[:]", -1);
+ if (line[0] != NULL && strlen(line[0]) == 0
+ && line[1] != NULL && strlen(line[1]) > 0
+ && line[2] != NULL && strlen(line[2]) > 0
+ && line[3] != NULL && strlen(line[3]) == 0) {
+ typestr = line[1];
+ name = line[2];
+ if (!strcmp(typestr, "core")) {
+ type = PWS_CORE;
+ } else if (!strcmp(typestr, "account")) {
+ type = PWS_ACCOUNT;
+ } else if (!strcmp(typestr, "plugin")) {
+ type = PWS_PLUGIN;
+ } else {
+ debug_print("Uknown password block type: '%s'\n", typestr);
+ g_strfreev(line);
+ i++; continue;
+ }
+
+ if ((block = _new_block(type, name)) == NULL) {
+ debug_print("Duplicate password block, ignoring: (%d/%s)\n",
+ type, name);
+ g_strfreev(line);
+ i++; continue;
+ }
+ }
+ g_strfreev(line);
+ } else if (strlen(lines[i]) > 0 && block != NULL) {
+ /* If we have started a password block, test for a
+ * "password_id = password" line. */
+ line = g_strsplit(lines[i], " ", -1);
+ if (line[0] != NULL && strlen(line[0]) > 0
+ && line[1] != NULL && strlen(line[1]) > 0
+ && line[2] == NULL) {
+ debug_print("Adding password '%s'\n", line[0]);
+ g_hash_table_insert(block->entries,
+ g_strdup(line[0]), g_strdup(line[1]));
+ }
+ g_strfreev(line);
+ }
+ i++;
+ }
+ g_strfreev(lines);
+}
projects / claws.git / commitdiff