claws-mail/src/privacy.c
Colin Leroy 983b61970e 2004-11-23 [colin] 0.9.12cvs166.1
* src/Makefile.am
	* src/codeconv.c
	* src/compose.c
	* src/folderview.c
	* src/main.c
	* src/partial_download.c
	* src/partial_download.h
	* src/prefs_account.c
	* src/prefs_account.h
	* src/privacy.c
	* src/privacy.h
	* src/procmime.c
	* src/common/Makefile.am
	* src/common/base64.h
	* src/common/partial_download.c
	* src/common/partial_download.h
	* src/gtk/prefswindow.c
	* src/gtk/prefswindow.h
	* src/plugins/pgpmime/pgpmime.c
	* src/plugins/pgpmime/prefs_gpg.c
	* src/plugins/pgpmime/prefs_gpg.h
	* src/plugins/pgpmime/sgpgme.c
	* src/plugins/pgpmime/sgpgme.h
		Sync with HEAD
2004-11-23 15:57:07 +00:00

351 lines
8.1 KiB
C

/*
* 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.
*/
#include <glib.h>
#include "intl.h"
#include "privacy.h"
#include "procmime.h"
static GSList *systems = NULL;
/**
* Register a new Privacy System
*
* \param system The Privacy System that should be registered
*/
void privacy_register_system(PrivacySystem *system)
{
systems = g_slist_append(systems, system);
}
/**
* Unregister a new Privacy System. The system must not be in
* use anymore when it is unregistered.
*
* \param system The Privacy System that should be unregistered
*/
void privacy_unregister_system(PrivacySystem *system)
{
systems = g_slist_remove(systems, system);
}
/**
* Free a PrivacyData of a PrivacySystem
*
* \param privacydata The data to free
*/
void privacy_free_privacydata(PrivacyData *privacydata)
{
g_return_if_fail(privacydata != NULL);
privacydata->system->free_privacydata(privacydata);
}
/**
* Check if a MimeInfo is signed with one of the available
* privacy system. If a privacydata is set in the MimeInfo
* it will directory return the return value by the system
* set in the privacy data or check all available privacy
* systems otherwise.
*
* \return True if the MimeInfo has a signature
*/
gboolean privacy_mimeinfo_is_signed(MimeInfo *mimeinfo)
{
GSList *cur;
g_return_val_if_fail(mimeinfo != NULL, FALSE);
if (mimeinfo->privacy != NULL) {
PrivacySystem *system = mimeinfo->privacy->system;
if (system->is_signed != NULL)
return system->is_signed(mimeinfo);
else
return FALSE;
}
for(cur = systems; cur != NULL; cur = g_slist_next(cur)) {
PrivacySystem *system = (PrivacySystem *) cur->data;
if(system->is_signed != NULL && system->is_signed(mimeinfo))
return TRUE;
}
return FALSE;
}
/**
* Check the signature of a MimeInfo. privacy_mimeinfo_is_signed
* should be called before otherwise it is done by this function.
* If the MimeInfo is not signed an error code will be returned.
*
* \return Error code indicating the result of the check,
* < 0 if an error occured
*/
gint privacy_mimeinfo_check_signature(MimeInfo *mimeinfo)
{
PrivacySystem *system;
g_return_val_if_fail(mimeinfo != NULL, -1);
if (mimeinfo->privacy == NULL)
privacy_mimeinfo_is_signed(mimeinfo);
if (mimeinfo->privacy == NULL)
return -1;
system = mimeinfo->privacy->system;
if (system->check_signature == NULL)
return -1;
return system->check_signature(mimeinfo);
}
SignatureStatus privacy_mimeinfo_get_sig_status(MimeInfo *mimeinfo)
{
PrivacySystem *system;
g_return_val_if_fail(mimeinfo != NULL, -1);
if (mimeinfo->privacy == NULL)
privacy_mimeinfo_is_signed(mimeinfo);
if (mimeinfo->privacy == NULL)
return SIGNATURE_UNCHECKED;
system = mimeinfo->privacy->system;
if (system->get_sig_status == NULL)
return SIGNATURE_UNCHECKED;
return system->get_sig_status(mimeinfo);
}
gchar *privacy_mimeinfo_sig_info_short(MimeInfo *mimeinfo)
{
PrivacySystem *system;
g_return_val_if_fail(mimeinfo != NULL, NULL);
if (mimeinfo->privacy == NULL)
privacy_mimeinfo_is_signed(mimeinfo);
if (mimeinfo->privacy == NULL)
return g_strdup(_("No signature found"));
system = mimeinfo->privacy->system;
if (system->get_sig_info_short == NULL)
return g_strdup(_("No information available"));
return system->get_sig_info_short(mimeinfo);
}
gchar *privacy_mimeinfo_sig_info_full(MimeInfo *mimeinfo)
{
PrivacySystem *system;
g_return_val_if_fail(mimeinfo != NULL, NULL);
if (mimeinfo->privacy == NULL)
privacy_mimeinfo_is_signed(mimeinfo);
if (mimeinfo->privacy == NULL)
return g_strdup(_("No signature found"));
system = mimeinfo->privacy->system;
if (system->get_sig_info_full == NULL)
return g_strdup(_("No information available"));
return system->get_sig_info_full(mimeinfo);
}
gboolean privacy_mimeinfo_is_encrypted(MimeInfo *mimeinfo)
{
GSList *cur;
g_return_val_if_fail(mimeinfo != NULL, FALSE);
for(cur = systems; cur != NULL; cur = g_slist_next(cur)) {
PrivacySystem *system = (PrivacySystem *) cur->data;
if(system->is_encrypted != NULL && system->is_encrypted(mimeinfo))
return TRUE;
}
return FALSE;
}
static gint decrypt(MimeInfo *mimeinfo, PrivacySystem *system)
{
MimeInfo *decryptedinfo, *parentinfo;
gint childnumber;
g_return_val_if_fail(system->decrypt != NULL, -1);
decryptedinfo = system->decrypt(mimeinfo);
if (decryptedinfo == NULL)
return -1;
parentinfo = procmime_mimeinfo_parent(mimeinfo);
childnumber = g_node_child_index(parentinfo->node, mimeinfo);
procmime_mimeinfo_free_all(mimeinfo);
g_node_insert(parentinfo->node, childnumber, decryptedinfo->node);
return 0;
}
gint privacy_mimeinfo_decrypt(MimeInfo *mimeinfo)
{
GSList *cur;
g_return_val_if_fail(mimeinfo != NULL, FALSE);
for(cur = systems; cur != NULL; cur = g_slist_next(cur)) {
PrivacySystem *system = (PrivacySystem *) cur->data;
if(system->is_encrypted != NULL && system->is_encrypted(mimeinfo))
return decrypt(mimeinfo, system);
}
return -1;
}
GSList *privacy_get_system_ids()
{
GSList *cur;
GSList *ret = NULL;
for(cur = systems; cur != NULL; cur = g_slist_next(cur)) {
PrivacySystem *system = (PrivacySystem *) cur->data;
ret = g_slist_append(ret, g_strdup(system->id));
}
return ret;
}
static PrivacySystem *privacy_get_system(const gchar *id)
{
GSList *cur;
g_return_val_if_fail(id != NULL, NULL);
for(cur = systems; cur != NULL; cur = g_slist_next(cur)) {
PrivacySystem *system = (PrivacySystem *) cur->data;
if(strcmp(id, system->id) == 0)
return system;
}
return NULL;
}
const gchar *privacy_system_get_name(const gchar *id)
{
PrivacySystem *system;
g_return_val_if_fail(id != NULL, NULL);
system = privacy_get_system(id);
if (system == NULL)
return NULL;
return system->name;
}
gboolean privacy_system_can_sign(const gchar *id)
{
PrivacySystem *system;
g_return_val_if_fail(id != NULL, FALSE);
system = privacy_get_system(id);
if (system == NULL)
return FALSE;
return system->can_sign;
}
gboolean privacy_system_can_encrypt(const gchar *id)
{
PrivacySystem *system;
g_return_val_if_fail(id != NULL, FALSE);
system = privacy_get_system(id);
if (system == NULL)
return FALSE;
return system->can_encrypt;
}
gboolean privacy_sign(const gchar *id, MimeInfo *target, PrefsAccount *account)
{
PrivacySystem *system;
g_return_val_if_fail(id != NULL, FALSE);
g_return_val_if_fail(target != NULL, FALSE);
system = privacy_get_system(id);
if (system == NULL)
return FALSE;
if (!system->can_sign)
return FALSE;
if (system->sign == NULL)
return FALSE;
return system->sign(target, account);
}
gchar *privacy_get_encrypt_data(const gchar *id, GSList *recp_names)
{
PrivacySystem *system;
g_return_val_if_fail(id != NULL, NULL);
g_return_val_if_fail(recp_names != NULL, NULL);
system = privacy_get_system(id);
if (system == NULL)
return NULL;
if (!system->can_encrypt)
return NULL;
if (system->get_encrypt_data == NULL)
return NULL;
return system->get_encrypt_data(recp_names);
}
gboolean privacy_encrypt(const gchar *id, MimeInfo *mimeinfo, const gchar *encdata)
{
PrivacySystem *system;
g_return_val_if_fail(id != NULL, FALSE);
g_return_val_if_fail(mimeinfo != NULL, FALSE);
g_return_val_if_fail(encdata != NULL, FALSE);
system = privacy_get_system(id);
if (system == NULL)
return FALSE;
if (!system->can_encrypt)
return FALSE;
if (system->encrypt == NULL)
return FALSE;
return system->encrypt(mimeinfo, encdata);
}