--- /dev/null
+/* engine-uiserver.c - Uiserver engine.
+ Copyright (C) 2000 Werner Koch (dd9jn)
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2009 g10 Code GmbH
+
+ This file is part of GPGME.
+
+ GPGME is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of
+ the License, or (at your option) any later version.
+
+ GPGME 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser 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. */
+
+/* Peculiar: Use special keys from email address for recipient and
+ signer (==sender). Use no data objects with encryption for
+ prep_encrypt. */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <unistd.h>
+#include <locale.h>
+#include <fcntl.h> /* FIXME */
+#include <errno.h>
+
+#include "gpgme.h"
+#include "util.h"
+#include "ops.h"
+#include "wait.h"
+#include "priv-io.h"
+#include "sema.h"
+#include "data.h"
+
+#include "assuan.h"
+#include "status-table.h"
+#include "debug.h"
+
+#include "engine-backend.h"
+
+\f
+typedef struct
+{
+ int fd; /* FD we talk about. */
+ int server_fd;/* Server FD for this connection. */
+ int dir; /* Inbound/Outbound, maybe given implicit? */
+ void *data; /* Handler-specific data. */
+ void *tag; /* ID from the user for gpgme_remove_io_callback. */
+ char server_fd_str[15]; /* Same as SERVER_FD but as a string. We
+ need this because _gpgme_io_fd2str can't
+ be used on a closed descriptor. */
+} iocb_data_t;
+
+
+struct engine_uiserver
+{
+ assuan_context_t assuan_ctx;
+
+ int lc_ctype_set;
+ int lc_messages_set;
+ gpgme_protocol_t protocol;
+
+ iocb_data_t status_cb;
+
+ /* Input, output etc are from the servers perspective. */
+ iocb_data_t input_cb;
+ gpgme_data_t input_helper_data; /* Input helper data object. */
+ void *input_helper_memory; /* Input helper memory block. */
+
+ iocb_data_t output_cb;
+
+ iocb_data_t message_cb;
+
+ struct
+ {
+ engine_status_handler_t fnc;
+ void *fnc_value;
+ } status;
+
+ struct
+ {
+ engine_colon_line_handler_t fnc;
+ void *fnc_value;
+ struct
+ {
+ char *line;
+ int linesize;
+ int linelen;
+ } attic;
+ int any; /* any data line seen */
+ } colon;
+
+ gpgme_data_t inline_data; /* Used to collect D lines. */
+
+ struct gpgme_io_cbs io_cbs;
+};
+
+typedef struct engine_uiserver *engine_uiserver_t;
+
+
+static void uiserver_io_event (void *engine,
+ gpgme_event_io_t type, void *type_data);
+
+
+\f
+static char *
+uiserver_get_version (const char *file_name)
+{
+ return strdup ("1.0");
+}
+
+
+static const char *
+uiserver_get_req_version (void)
+{
+ return "1.0";
+}
+
+\f
+static void
+close_notify_handler (int fd, void *opaque)
+{
+ engine_uiserver_t uiserver = opaque;
+
+ assert (fd != -1);
+ if (uiserver->status_cb.fd == fd)
+ {
+ if (uiserver->status_cb.tag)
+ (*uiserver->io_cbs.remove) (uiserver->status_cb.tag);
+ uiserver->status_cb.fd = -1;
+ uiserver->status_cb.tag = NULL;
+ }
+ else if (uiserver->input_cb.fd == fd)
+ {
+ if (uiserver->input_cb.tag)
+ (*uiserver->io_cbs.remove) (uiserver->input_cb.tag);
+ uiserver->input_cb.fd = -1;
+ uiserver->input_cb.tag = NULL;
+ if (uiserver->input_helper_data)
+ {
+ gpgme_data_release (uiserver->input_helper_data);
+ uiserver->input_helper_data = NULL;
+ }
+ if (uiserver->input_helper_memory)
+ {
+ free (uiserver->input_helper_memory);
+ uiserver->input_helper_memory = NULL;
+ }
+ }
+ else if (uiserver->output_cb.fd == fd)
+ {
+ if (uiserver->output_cb.tag)
+ (*uiserver->io_cbs.remove) (uiserver->output_cb.tag);
+ uiserver->output_cb.fd = -1;
+ uiserver->output_cb.tag = NULL;
+ }
+ else if (uiserver->message_cb.fd == fd)
+ {
+ if (uiserver->message_cb.tag)
+ (*uiserver->io_cbs.remove) (uiserver->message_cb.tag);
+ uiserver->message_cb.fd = -1;
+ uiserver->message_cb.tag = NULL;
+ }
+}
+
+
+/* This is the default inquiry callback. We use it to handle the
+ Pinentry notifications. */
+static gpgme_error_t
+default_inq_cb (engine_uiserver_t uiserver, const char *line)
+{
+ if (!strncmp (line, "PINENTRY_LAUNCHED", 17) && (line[17]==' '||!line[17]))
+ {
+ _gpgme_allow_set_foreground_window ((pid_t)strtoul (line+17, NULL, 10));
+ }
+
+ return 0;
+}
+
+
+static gpgme_error_t
+uiserver_cancel (void *engine)
+{
+ engine_uiserver_t uiserver = engine;
+
+ if (!uiserver)
+ return gpg_error (GPG_ERR_INV_VALUE);
+
+ if (uiserver->status_cb.fd != -1)
+ _gpgme_io_close (uiserver->status_cb.fd);
+ if (uiserver->input_cb.fd != -1)
+ _gpgme_io_close (uiserver->input_cb.fd);
+ if (uiserver->output_cb.fd != -1)
+ _gpgme_io_close (uiserver->output_cb.fd);
+ if (uiserver->message_cb.fd != -1)
+ _gpgme_io_close (uiserver->message_cb.fd);
+
+ if (uiserver->assuan_ctx)
+ {
+ assuan_release (uiserver->assuan_ctx);
+ uiserver->assuan_ctx = NULL;
+ }
+
+ return 0;
+}
+
+
+static void
+uiserver_release (void *engine)
+{
+ engine_uiserver_t uiserver = engine;
+
+ if (!uiserver)
+ return;
+
+ uiserver_cancel (engine);
+
+ free (uiserver->colon.attic.line);
+ free (uiserver);
+}
+
+
+static gpgme_error_t
+uiserver_new (void **engine, const char *file_name, const char *home_dir)
+{
+ gpgme_error_t err = 0;
+ engine_uiserver_t uiserver;
+ char *dft_display = NULL;
+ char dft_ttyname[64];
+ char *dft_ttytype = NULL;
+ char *optstr;
+
+ uiserver = calloc (1, sizeof *uiserver);
+ if (!uiserver)
+ return gpg_error_from_syserror ();
+
+ uiserver->protocol = GPGME_PROTOCOL_DEFAULT;
+ uiserver->status_cb.fd = -1;
+ uiserver->status_cb.dir = 1;
+ uiserver->status_cb.tag = 0;
+ uiserver->status_cb.data = uiserver;
+
+ uiserver->input_cb.fd = -1;
+ uiserver->input_cb.dir = 0;
+ uiserver->input_cb.tag = 0;
+ uiserver->input_cb.server_fd = -1;
+ *uiserver->input_cb.server_fd_str = 0;
+ uiserver->output_cb.fd = -1;
+ uiserver->output_cb.dir = 1;
+ uiserver->output_cb.tag = 0;
+ uiserver->output_cb.server_fd = -1;
+ *uiserver->output_cb.server_fd_str = 0;
+ uiserver->message_cb.fd = -1;
+ uiserver->message_cb.dir = 0;
+ uiserver->message_cb.tag = 0;
+ uiserver->message_cb.server_fd = -1;
+ *uiserver->message_cb.server_fd_str = 0;
+
+ uiserver->status.fnc = 0;
+ uiserver->colon.fnc = 0;
+ uiserver->colon.attic.line = 0;
+ uiserver->colon.attic.linesize = 0;
+ uiserver->colon.attic.linelen = 0;
+ uiserver->colon.any = 0;
+
+ uiserver->inline_data = NULL;
+
+ uiserver->io_cbs.add = NULL;
+ uiserver->io_cbs.add_priv = NULL;
+ uiserver->io_cbs.remove = NULL;
+ uiserver->io_cbs.event = NULL;
+ uiserver->io_cbs.event_priv = NULL;
+
+ err = assuan_new_ext (&uiserver->assuan_ctx, GPG_ERR_SOURCE_GPGME,
+ &_gpgme_assuan_malloc_hooks, _gpgme_assuan_log_cb,
+ NULL);
+ if (err)
+ goto leave;
+ assuan_ctx_set_system_hooks (uiserver->assuan_ctx,
+ &_gpgme_assuan_system_hooks);
+
+ err = assuan_socket_connect (uiserver->assuan_ctx,
+ file_name ?
+ file_name : _gpgme_get_uiserver_socket_path (),
+ 0, 0);
+ if (err)
+ goto leave;
+
+ err = _gpgme_getenv ("DISPLAY", &dft_display);
+ if (err)
+ goto leave;
+ if (dft_display)
+ {
+ if (asprintf (&optstr, "OPTION display=%s", dft_display) < 0)
+ {
+ free (dft_display);
+ err = gpg_error_from_errno (errno);
+ goto leave;
+ }
+ free (dft_display);
+
+ err = assuan_transact (uiserver->assuan_ctx, optstr, NULL, NULL, NULL,
+ NULL, NULL, NULL);
+ free (optstr);
+ if (err)
+ goto leave;
+ }
+
+ if (isatty (1))
+ {
+ int rc;
+
+ rc = ttyname_r (1, dft_ttyname, sizeof (dft_ttyname));
+ if (rc)
+ {
+ err = gpg_error_from_errno (rc);
+ goto leave;
+ }
+ else
+ {
+ if (asprintf (&optstr, "OPTION ttyname=%s", dft_ttyname) < 0)
+ {
+ err = gpg_error_from_errno (errno);
+ goto leave;
+ }
+ err = assuan_transact (uiserver->assuan_ctx, optstr, NULL, NULL, NULL,
+ NULL, NULL, NULL);
+ free (optstr);
+ if (err)
+ goto leave;
+
+ err = _gpgme_getenv ("TERM", &dft_ttytype);
+ if (err)
+ goto leave;
+ if (dft_ttytype)
+ {
+ if (asprintf (&optstr, "OPTION ttytype=%s", dft_ttytype) < 0)
+ {
+ free (dft_ttytype);
+ err = gpg_error_from_errno (errno);
+ goto leave;
+ }
+ free (dft_ttytype);
+
+ err = assuan_transact (uiserver->assuan_ctx, optstr, NULL, NULL,
+ NULL, NULL, NULL, NULL);
+ free (optstr);
+ if (err)
+ goto leave;
+ }
+ }
+ }
+
+#ifdef HAVE_W32_SYSTEM
+ /* Under Windows we need to use AllowSetForegroundWindow. Tell
+ uiserver to tell us when it needs it. */
+ if (!err)
+ {
+ err = assuan_transact (uiserver->assuan_ctx, "OPTION allow-pinentry-notify",
+ NULL, NULL, NULL, NULL, NULL, NULL);
+ if (gpg_err_code (err) == GPG_ERR_UNKNOWN_OPTION)
+ err = 0; /* This is a new feature of uiserver. */
+ }
+#endif /*HAVE_W32_SYSTEM*/
+
+ leave:
+ if (err)
+ uiserver_release (uiserver);
+ else
+ *engine = uiserver;
+
+ return err;
+}
+
+
+static gpgme_error_t
+uiserver_set_locale (void *engine, int category, const char *value)
+{
+ engine_uiserver_t uiserver = engine;
+ gpgme_error_t err;
+ char *optstr;
+ char *catstr;
+
+ /* FIXME: If value is NULL, we need to reset the option to default.
+ But we can't do this. So we error out here. UISERVER needs support
+ for this. */
+ if (category == LC_CTYPE)
+ {
+ catstr = "lc-ctype";
+ if (!value && uiserver->lc_ctype_set)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ if (value)
+ uiserver->lc_ctype_set = 1;
+ }
+#ifdef LC_MESSAGES
+ else if (category == LC_MESSAGES)
+ {
+ catstr = "lc-messages";
+ if (!value && uiserver->lc_messages_set)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ if (value)
+ uiserver->lc_messages_set = 1;
+ }
+#endif /* LC_MESSAGES */
+ else
+ return gpg_error (GPG_ERR_INV_VALUE);
+
+ /* FIXME: Reset value to default. */
+ if (!value)
+ return 0;
+
+ if (asprintf (&optstr, "OPTION %s=%s", catstr, value) < 0)
+ err = gpg_error_from_errno (errno);
+ else
+ {
+ err = assuan_transact (uiserver->assuan_ctx, optstr, NULL, NULL,
+ NULL, NULL, NULL, NULL);
+ free (optstr);
+ }
+
+ return err;
+}
+
+
+static gpgme_error_t
+uiserver_set_protocol (void *engine, gpgme_protocol_t protocol)
+{
+ engine_uiserver_t uiserver = engine;
+
+ if (protocol != GPGME_PROTOCOL_OpenPGP
+ && protocol != GPGME_PROTOCOL_CMS
+ && protocol != GPGME_PROTOCOL_DEFAULT)
+ return gpg_error (GPG_ERR_INV_VALUE);
+
+ uiserver->protocol = protocol;
+ return 0;
+}
+
+
+/* Forward declaration. */
+static gpgme_status_code_t parse_status (const char *name);
+
+static gpgme_error_t
+uiserver_assuan_simple_command (assuan_context_t ctx, char *cmd,
+ engine_status_handler_t status_fnc,
+ void *status_fnc_value)
+{
+ gpg_error_t err;
+ char *line;
+ size_t linelen;
+
+ err = assuan_write_line (ctx, cmd);
+ if (err)
+ return err;
+
+ do
+ {
+ err = assuan_read_line (ctx, &line, &linelen);
+ if (err)
+ return err;
+
+ if (*line == '#' || !linelen)
+ continue;
+
+ if (linelen >= 2
+ && line[0] == 'O' && line[1] == 'K'
+ && (line[2] == '\0' || line[2] == ' '))
+ return 0;
+ else if (linelen >= 4
+ && line[0] == 'E' && line[1] == 'R' && line[2] == 'R'
+ && line[3] == ' ')
+ err = atoi (&line[4]);
+ else if (linelen >= 2
+ && line[0] == 'S' && line[1] == ' ')
+ {
+ char *rest;
+ gpgme_status_code_t r;
+
+ rest = strchr (line + 2, ' ');
+ if (!rest)
+ rest = line + linelen; /* set to an empty string */
+ else
+ *(rest++) = 0;
+
+ r = parse_status (line + 2);
+
+ if (r >= 0 && status_fnc)
+ err = status_fnc (status_fnc_value, r, rest);
+ else
+ err = gpg_error (GPG_ERR_GENERAL);
+ }
+ else
+ err = gpg_error (GPG_ERR_GENERAL);
+ }
+ while (!err);
+
+ return err;
+}
+
+
+typedef enum { INPUT_FD, OUTPUT_FD, MESSAGE_FD } fd_type_t;
+
+#define COMMANDLINELEN 40
+static gpgme_error_t
+uiserver_set_fd (engine_uiserver_t uiserver, fd_type_t fd_type, const char *opt)
+{
+ gpg_error_t err = 0;
+ char line[COMMANDLINELEN];
+ char *which;
+ iocb_data_t *iocb_data;
+ int dir;
+
+ switch (fd_type)
+ {
+ case INPUT_FD:
+ which = "INPUT";
+ iocb_data = &uiserver->input_cb;
+ break;
+
+ case OUTPUT_FD:
+ which = "OUTPUT";
+ iocb_data = &uiserver->output_cb;
+ break;
+
+ case MESSAGE_FD:
+ which = "MESSAGE";
+ iocb_data = &uiserver->message_cb;
+ break;
+
+ default:
+ return gpg_error (GPG_ERR_INV_VALUE);
+ }
+
+ dir = iocb_data->dir;
+
+ /* We try to short-cut the communication by giving UISERVER direct
+ access to the file descriptor, rather than using a pipe. */
+ iocb_data->server_fd = _gpgme_data_get_fd (iocb_data->data);
+ if (iocb_data->server_fd < 0)
+ {
+ int fds[2];
+
+ if (_gpgme_io_pipe (fds, 0) < 0)
+ return gpg_error_from_errno (errno);
+
+ iocb_data->fd = dir ? fds[0] : fds[1];
+ iocb_data->server_fd = dir ? fds[1] : fds[0];
+
+ if (_gpgme_io_set_close_notify (iocb_data->fd,
+ close_notify_handler, uiserver))
+ {
+ err = gpg_error (GPG_ERR_GENERAL);
+ goto leave_set_fd;
+ }
+ }
+
+ err = assuan_sendfd (uiserver->assuan_ctx, iocb_data->server_fd);
+ if (err)
+ goto leave_set_fd;
+
+ _gpgme_io_close (iocb_data->server_fd);
+ iocb_data->server_fd = -1;
+
+ if (opt)
+ snprintf (line, COMMANDLINELEN, "%s FD %s", which, opt);
+ else
+ snprintf (line, COMMANDLINELEN, "%s FD", which);
+
+ err = uiserver_assuan_simple_command (uiserver->assuan_ctx, line, NULL, NULL);
+
+ leave_set_fd:
+ if (err)
+ {
+ _gpgme_io_close (iocb_data->fd);
+ iocb_data->fd = -1;
+ if (iocb_data->server_fd != -1)
+ {
+ _gpgme_io_close (iocb_data->server_fd);
+ iocb_data->server_fd = -1;
+ }
+ }
+
+ return err;
+}
+
+
+static const char *
+map_data_enc (gpgme_data_t d)
+{
+ switch (gpgme_data_get_encoding (d))
+ {
+ case GPGME_DATA_ENCODING_NONE:
+ break;
+ case GPGME_DATA_ENCODING_BINARY:
+ return "--binary";
+ case GPGME_DATA_ENCODING_BASE64:
+ return "--base64";
+ case GPGME_DATA_ENCODING_ARMOR:
+ return "--armor";
+ default:
+ break;
+ }
+ return NULL;
+}
+
+
+static int
+status_cmp (const void *ap, const void *bp)
+{
+ const struct status_table_s *a = ap;
+ const struct status_table_s *b = bp;
+
+ return strcmp (a->name, b->name);
+}
+
+
+static gpgme_status_code_t
+parse_status (const char *name)
+{
+ struct status_table_s t, *r;
+ t.name = name;
+ r = bsearch (&t, status_table, DIM(status_table) - 1,
+ sizeof t, status_cmp);
+ return r ? r->code : -1;
+}
+
+
+static gpgme_error_t
+status_handler (void *opaque, int fd)
+{
+ struct io_cb_data *data = (struct io_cb_data *) opaque;
+ engine_uiserver_t uiserver = (engine_uiserver_t) data->handler_value;
+ gpgme_error_t err = 0;
+ char *line;
+ size_t linelen;
+
+ do
+ {
+ err = assuan_read_line (uiserver->assuan_ctx, &line, &linelen);
+ if (err)
+ {
+ /* Try our best to terminate the connection friendly. */
+ /* assuan_write_line (uiserver->assuan_ctx, "BYE"); */
+ TRACE3 (DEBUG_CTX, "gpgme:status_handler", uiserver,
+ "fd 0x%x: error from assuan (%d) getting status line : %s",
+ fd, err, gpg_strerror (err));
+ }
+ else if (linelen >= 3
+ && line[0] == 'E' && line[1] == 'R' && line[2] == 'R'
+ && (line[3] == '\0' || line[3] == ' '))
+ {
+ if (line[3] == ' ')
+ err = atoi (&line[4]);
+ if (! err)
+ err = gpg_error (GPG_ERR_GENERAL);
+ TRACE2 (DEBUG_CTX, "gpgme:status_handler", uiserver,
+ "fd 0x%x: ERR line - mapped to: %s",
+ fd, err ? gpg_strerror (err) : "ok");
+ /* Try our best to terminate the connection friendly. */
+ /* assuan_write_line (uiserver->assuan_ctx, "BYE"); */
+ }
+ else if (linelen >= 2
+ && line[0] == 'O' && line[1] == 'K'
+ && (line[2] == '\0' || line[2] == ' '))
+ {
+ if (uiserver->status.fnc)
+ err = uiserver->status.fnc (uiserver->status.fnc_value,
+ GPGME_STATUS_EOF, "");
+
+ if (!err && uiserver->colon.fnc && uiserver->colon.any)
+ {
+ /* We must tell a colon function about the EOF. We do
+ this only when we have seen any data lines. Note
+ that this inlined use of colon data lines will
+ eventually be changed into using a regular data
+ channel. */
+ uiserver->colon.any = 0;
+ err = uiserver->colon.fnc (uiserver->colon.fnc_value, NULL);
+ }
+ TRACE2 (DEBUG_CTX, "gpgme:status_handler", uiserver,
+ "fd 0x%x: OK line - final status: %s",
+ fd, err ? gpg_strerror (err) : "ok");
+ _gpgme_io_close (uiserver->status_cb.fd);
+ return err;
+ }
+ else if (linelen > 2
+ && line[0] == 'D' && line[1] == ' '
+ && uiserver->colon.fnc)
+ {
+ /* We are using the colon handler even for plain inline data
+ - strange name for that function but for historic reasons
+ we keep it. */
+ /* FIXME We can't use this for binary data because we
+ assume this is a string. For the current usage of colon
+ output it is correct. */
+ char *src = line + 2;
+ char *end = line + linelen;
+ char *dst;
+ char **aline = &uiserver->colon.attic.line;
+ int *alinelen = &uiserver->colon.attic.linelen;
+
+ if (uiserver->colon.attic.linesize < *alinelen + linelen + 1)
+ {
+ char *newline = realloc (*aline, *alinelen + linelen + 1);
+ if (!newline)
+ err = gpg_error_from_errno (errno);
+ else
+ {
+ *aline = newline;
+ uiserver->colon.attic.linesize += linelen + 1;
+ }
+ }
+ if (!err)
+ {
+ dst = *aline + *alinelen;
+
+ while (!err && src < end)
+ {
+ if (*src == '%' && src + 2 < end)
+ {
+ /* Handle escaped characters. */
+ ++src;
+ *dst = _gpgme_hextobyte (src);
+ (*alinelen)++;
+ src += 2;
+ }
+ else
+ {
+ *dst = *src++;
+ (*alinelen)++;
+ }
+
+ if (*dst == '\n')
+ {
+ /* Terminate the pending line, pass it to the colon
+ handler and reset it. */
+
+ uiserver->colon.any = 1;
+ if (*alinelen > 1 && *(dst - 1) == '\r')
+ dst--;
+ *dst = '\0';
+
+ /* FIXME How should we handle the return code? */
+ err = uiserver->colon.fnc (uiserver->colon.fnc_value, *aline);
+ if (!err)
+ {
+ dst = *aline;
+ *alinelen = 0;
+ }
+ }
+ else
+ dst++;
+ }
+ }
+ TRACE2 (DEBUG_CTX, "gpgme:status_handler", uiserver,
+ "fd 0x%x: D line; final status: %s",
+ fd, err? gpg_strerror (err):"ok");
+ }
+ else if (linelen > 2
+ && line[0] == 'D' && line[1] == ' '
+ && uiserver->inline_data)
+ {
+ char *src = line + 2;
+ char *end = line + linelen;
+ char *dst = src;
+ ssize_t nwritten;
+
+ linelen = 0;
+ while (src < end)
+ {
+ if (*src == '%' && src + 2 < end)
+ {
+ /* Handle escaped characters. */
+ ++src;
+ *dst++ = _gpgme_hextobyte (src);
+ src += 2;
+ }
+ else
+ *dst++ = *src++;
+
+ linelen++;
+ }
+
+ src = line + 2;
+ while (linelen > 0)
+ {
+ nwritten = gpgme_data_write (uiserver->inline_data, src, linelen);
+ if (!nwritten || (nwritten < 0 && errno != EINTR)
+ || nwritten > linelen)
+ {
+ err = gpg_error_from_errno (errno);
+ break;
+ }
+ src += nwritten;
+ linelen -= nwritten;
+ }
+
+ TRACE2 (DEBUG_CTX, "gpgme:status_handler", uiserver,
+ "fd 0x%x: D inlinedata; final status: %s",
+ fd, err? gpg_strerror (err):"ok");
+ }
+ else if (linelen > 2
+ && line[0] == 'S' && line[1] == ' ')
+ {
+ char *rest;
+ gpgme_status_code_t r;
+
+ rest = strchr (line + 2, ' ');
+ if (!rest)
+ rest = line + linelen; /* set to an empty string */
+ else
+ *(rest++) = 0;
+
+ r = parse_status (line + 2);
+
+ if (r >= 0)
+ {
+ if (uiserver->status.fnc)
+ err = uiserver->status.fnc (uiserver->status.fnc_value, r, rest);
+ }
+ else
+ fprintf (stderr, "[UNKNOWN STATUS]%s %s", line + 2, rest);
+ TRACE3 (DEBUG_CTX, "gpgme:status_handler", uiserver,
+ "fd 0x%x: S line (%s) - final status: %s",
+ fd, line+2, err? gpg_strerror (err):"ok");
+ }
+ else if (linelen >= 7
+ && line[0] == 'I' && line[1] == 'N' && line[2] == 'Q'
+ && line[3] == 'U' && line[4] == 'I' && line[5] == 'R'
+ && line[6] == 'E'
+ && (line[7] == '\0' || line[7] == ' '))
+ {
+ char *keyword = line+7;
+
+ while (*keyword == ' ')
+ keyword++;;
+ default_inq_cb (uiserver, keyword);
+ assuan_write_line (uiserver->assuan_ctx, "END");
+ }
+
+ }
+ while (!err && assuan_pending_line (uiserver->assuan_ctx));
+
+ return err;
+}
+
+
+static gpgme_error_t
+add_io_cb (engine_uiserver_t uiserver, iocb_data_t *iocbd, gpgme_io_cb_t handler)
+{
+ gpgme_error_t err;
+
+ TRACE_BEG2 (DEBUG_ENGINE, "engine-uiserver:add_io_cb", uiserver,
+ "fd %d, dir %d", iocbd->fd, iocbd->dir);
+ err = (*uiserver->io_cbs.add) (uiserver->io_cbs.add_priv,
+ iocbd->fd, iocbd->dir,
+ handler, iocbd->data, &iocbd->tag);
+ if (err)
+ return TRACE_ERR (err);
+ if (!iocbd->dir)
+ /* FIXME Kludge around poll() problem. */
+ err = _gpgme_io_set_nonblocking (iocbd->fd);
+ return TRACE_ERR (err);
+}
+
+
+static gpgme_error_t
+start (engine_uiserver_t uiserver, const char *command)
+{
+ gpgme_error_t err;
+ int fdlist[5];
+ int nfds;
+
+ /* We need to know the fd used by assuan for reads. We do this by
+ using the assumption that the first returned fd from
+ assuan_get_active_fds() is always this one. */
+ nfds = assuan_get_active_fds (uiserver->assuan_ctx, 0 /* read fds */,
+ fdlist, DIM (fdlist));
+ if (nfds < 1)
+ return gpg_error (GPG_ERR_GENERAL); /* FIXME */
+
+ /* We "duplicate" the file descriptor, so we can close it here (we
+ can't close fdlist[0], as that is closed by libassuan, and
+ closing it here might cause libassuan to close some unrelated FD
+ later). Alternatively, we could special case status_fd and
+ register/unregister it manually as needed, but this increases
+ code duplication and is more complicated as we can not use the
+ close notifications etc. A third alternative would be to let
+ Assuan know that we closed the FD, but that complicates the
+ Assuan interface. */
+
+ uiserver->status_cb.fd = _gpgme_io_dup (fdlist[0]);
+ if (uiserver->status_cb.fd < 0)
+ return gpg_error_from_syserror ();
+
+ if (_gpgme_io_set_close_notify (uiserver->status_cb.fd,
+ close_notify_handler, uiserver))
+ {
+ _gpgme_io_close (uiserver->status_cb.fd);
+ uiserver->status_cb.fd = -1;
+ return gpg_error (GPG_ERR_GENERAL);
+ }
+
+ err = add_io_cb (uiserver, &uiserver->status_cb, status_handler);
+ if (!err && uiserver->input_cb.fd != -1)
+ err = add_io_cb (uiserver, &uiserver->input_cb, _gpgme_data_outbound_handler);
+ if (!err && uiserver->output_cb.fd != -1)
+ err = add_io_cb (uiserver, &uiserver->output_cb, _gpgme_data_inbound_handler);
+ if (!err && uiserver->message_cb.fd != -1)
+ err = add_io_cb (uiserver, &uiserver->message_cb, _gpgme_data_outbound_handler);
+
+ if (!err)
+ err = assuan_write_line (uiserver->assuan_ctx, command);
+
+ if (!err)
+ uiserver_io_event (uiserver, GPGME_EVENT_START, NULL);
+
+ return err;
+}
+
+
+static gpgme_error_t
+uiserver_reset (void *engine)
+{
+ engine_uiserver_t uiserver = engine;
+
+ /* We must send a reset because we need to reset the list of
+ signers. Note that RESET does not reset OPTION commands. */
+ return uiserver_assuan_simple_command (uiserver->assuan_ctx, "RESET", NULL, NULL);
+}
+
+
+static gpgme_error_t
+_uiserver_decrypt (void *engine, int verify,
+ gpgme_data_t ciph, gpgme_data_t plain)
+{
+ engine_uiserver_t uiserver = engine;
+ gpgme_error_t err;
+ const char *protocol;
+ char *cmd;
+
+ if (!uiserver)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ if (uiserver->protocol == GPGME_PROTOCOL_DEFAULT)
+ protocol = "";
+ else if (uiserver->protocol == GPGME_PROTOCOL_OpenPGP)
+ protocol = " --protocol=OpenPGP";
+ else if (uiserver->protocol == GPGME_PROTOCOL_CMS)
+ protocol = " --protocol=CMS";
+ else
+ return gpgme_error (GPG_ERR_UNSUPPORTED_PROTOCOL);
+
+ if (asprintf (&cmd, "DECRYPT%s%s", protocol,
+ verify ? "" : " --no-verify") < 0)
+ return gpg_error_from_errno (errno);
+
+ uiserver->input_cb.data = ciph;
+ err = uiserver_set_fd (uiserver, INPUT_FD,
+ map_data_enc (uiserver->input_cb.data));
+ if (err)
+ {
+ free (cmd);
+ return gpg_error (GPG_ERR_GENERAL); /* FIXME */
+ }
+ uiserver->output_cb.data = plain;
+ err = uiserver_set_fd (uiserver, OUTPUT_FD, 0);
+ if (err)
+ {
+ free (cmd);
+ return gpg_error (GPG_ERR_GENERAL); /* FIXME */
+ }
+ uiserver->inline_data = NULL;
+
+ err = start (engine, cmd);
+ free (cmd);
+ return err;
+}
+
+
+static gpgme_error_t
+uiserver_decrypt (void *engine, gpgme_data_t ciph, gpgme_data_t plain)
+{
+ return _uiserver_decrypt (engine, 0, ciph, plain);
+}
+
+
+static gpgme_error_t
+uiserver_decrypt_verify (void *engine, gpgme_data_t ciph, gpgme_data_t plain)
+{
+ return _uiserver_decrypt (engine, 1, ciph, plain);
+}
+
+
+static gpgme_error_t
+set_recipients (engine_uiserver_t uiserver, gpgme_key_t recp[])
+{
+ gpgme_error_t err = 0;
+ assuan_context_t ctx = uiserver->assuan_ctx;
+ char *line;
+ int linelen;
+ int invalid_recipients = 0;
+ int i = 0;
+
+ linelen = 10 + 40 + 1; /* "RECIPIENT " + guess + '\0'. */
+ line = malloc (10 + 40 + 1);
+ if (!line)
+ return gpg_error_from_errno (errno);
+ strcpy (line, "RECIPIENT ");
+ while (!err && recp[i])
+ {
+ char *fpr;
+ int newlen;
+
+ if (!recp[i]->subkeys || !recp[i]->subkeys->fpr)
+ {
+ invalid_recipients++;
+ continue;
+ }
+ fpr = recp[i]->subkeys->fpr;
+
+ newlen = 11 + strlen (fpr);
+ if (linelen < newlen)
+ {
+ char *newline = realloc (line, newlen);
+ if (! newline)
+ {
+ int saved_errno = errno;
+ free (line);
+ return gpg_error_from_errno (saved_errno);
+ }
+ line = newline;
+ linelen = newlen;
+ }
+ strcpy (&line[10], fpr);
+
+ err = uiserver_assuan_simple_command (ctx, line, uiserver->status.fnc,
+ uiserver->status.fnc_value);
+ /* FIXME: This requires more work. */
+ if (gpg_err_code (err) == GPG_ERR_NO_PUBKEY)
+ invalid_recipients++;
+ else if (err)
+ {
+ free (line);
+ return err;
+ }
+ i++;
+ }
+ free (line);
+ return gpg_error (invalid_recipients
+ ? GPG_ERR_UNUSABLE_PUBKEY : GPG_ERR_NO_ERROR);
+}
+
+
+static gpgme_error_t
+uiserver_encrypt (void *engine, gpgme_key_t recp[], gpgme_encrypt_flags_t flags,
+ gpgme_data_t plain, gpgme_data_t ciph, int use_armor)
+{
+ engine_uiserver_t uiserver = engine;
+ gpgme_error_t err;
+ const char *protocol;
+ char *cmd;
+
+ if (!uiserver)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ if (uiserver->protocol == GPGME_PROTOCOL_DEFAULT)
+ protocol = "";
+ else if (uiserver->protocol == GPGME_PROTOCOL_OpenPGP)
+ protocol = " --protocol=OpenPGP";
+ else if (uiserver->protocol == GPGME_PROTOCOL_CMS)
+ protocol = " --protocol=CMS";
+ else
+ return gpgme_error (GPG_ERR_UNSUPPORTED_PROTOCOL);
+
+ if (flags & GPGME_ENCRYPT_PREPARE)
+ {
+ if (!recp || plain || ciph)
+ return gpg_error (GPG_ERR_INV_VALUE);
+
+ if (asprintf (&cmd, "PREP_ENCRYPT%s%s", protocol,
+ (flags & GPGME_ENCRYPT_EXPECT_SIGN)
+ ? " --expect-sign" : "") < 0)
+ return gpg_error_from_errno (errno);
+ }
+ else
+ {
+ if (!plain || !ciph)
+ return gpg_error (GPG_ERR_INV_VALUE);
+
+ if (asprintf (&cmd, "ENCRYPT%s", protocol) < 0)
+ return gpg_error_from_errno (errno);
+ }
+
+ if (plain)
+ {
+ uiserver->input_cb.data = plain;
+ err = uiserver_set_fd (uiserver, INPUT_FD,
+ map_data_enc (uiserver->input_cb.data));
+ if (err)
+ {
+ free (cmd);
+ return err;
+ }
+ }
+
+ if (ciph)
+ {
+ uiserver->output_cb.data = ciph;
+ err = uiserver_set_fd (uiserver, OUTPUT_FD, use_armor ? "--armor"
+ : map_data_enc (uiserver->output_cb.data));
+ if (err)
+ {
+ free (cmd);
+ return err;
+ }
+ }
+
+ uiserver->inline_data = NULL;
+
+ if (recp)
+ {
+ err = set_recipients (uiserver, recp);
+ if (err)
+ {
+ free (cmd);
+ return err;
+ }
+ }
+
+ err = start (uiserver, cmd);
+ free (cmd);
+ return err;
+}
+
+
+static gpgme_error_t
+uiserver_sign (void *engine, gpgme_data_t in, gpgme_data_t out,
+ gpgme_sig_mode_t mode, int use_armor, int use_textmode,
+ int include_certs, gpgme_ctx_t ctx /* FIXME */)
+{
+ engine_uiserver_t uiserver = engine;
+ gpgme_error_t err = 0;
+ const char *protocol;
+ char *cmd;
+
+ if (!uiserver || !in || !out)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ if (uiserver->protocol == GPGME_PROTOCOL_DEFAULT)
+ protocol = "";
+ else if (uiserver->protocol == GPGME_PROTOCOL_OpenPGP)
+ protocol = " --protocol=OpenPGP";
+ else if (uiserver->protocol == GPGME_PROTOCOL_CMS)
+ protocol = " --protocol=CMS";
+ else
+ return gpgme_error (GPG_ERR_UNSUPPORTED_PROTOCOL);
+
+ if (asprintf (&cmd, "SIGN%s%s", protocol,
+ (mode == GPGME_SIG_MODE_DETACH) ? " --detached" : "") < 0)
+ return gpg_error_from_errno (errno);
+
+ {
+ gpgme_key_t key = gpgme_signers_enum (ctx, 0);
+ const char *s = NULL;
+
+ if (key && key->uids)
+ s = key->uids->email;
+
+ if (s && strlen (s) < 80)
+ {
+ char buf[100];
+
+ strcpy (stpcpy (buf, "SENDER --info "), s);
+ err = uiserver_assuan_simple_command (uiserver->assuan_ctx, buf,
+ uiserver->status.fnc,
+ uiserver->status.fnc_value);
+ }
+ else
+ err = gpg_error (GPG_ERR_INV_VALUE);
+ gpgme_key_unref (key);
+ if (err)
+ {
+ free (cmd);
+ return err;
+ }
+ }
+
+ uiserver->input_cb.data = in;
+ err = uiserver_set_fd (uiserver, INPUT_FD,
+ map_data_enc (uiserver->input_cb.data));
+ if (err)
+ {
+ free (cmd);
+ return err;
+ }
+ uiserver->output_cb.data = out;
+ err = uiserver_set_fd (uiserver, OUTPUT_FD, use_armor ? "--armor"
+ : map_data_enc (uiserver->output_cb.data));
+ if (err)
+ {
+ free (cmd);
+ return err;
+ }
+ uiserver->inline_data = NULL;
+
+ err = start (uiserver, cmd);
+ free (cmd);
+ return err;
+}
+
+
+/* FIXME: Missing a way to specify --silent. */
+static gpgme_error_t
+uiserver_verify (void *engine, gpgme_data_t sig, gpgme_data_t signed_text,
+ gpgme_data_t plaintext)
+{
+ engine_uiserver_t uiserver = engine;
+ gpgme_error_t err;
+ const char *protocol;
+ char *cmd;
+
+ if (!uiserver)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ if (uiserver->protocol == GPGME_PROTOCOL_DEFAULT)
+ protocol = "";
+ else if (uiserver->protocol == GPGME_PROTOCOL_OpenPGP)
+ protocol = " --protocol=OpenPGP";
+ else if (uiserver->protocol == GPGME_PROTOCOL_CMS)
+ protocol = " --protocol=CMS";
+ else
+ return gpgme_error (GPG_ERR_UNSUPPORTED_PROTOCOL);
+
+ if (asprintf (&cmd, "VERIFY%s", protocol) < 0)
+ return gpg_error_from_errno (errno);
+
+ uiserver->input_cb.data = sig;
+ err = uiserver_set_fd (uiserver, INPUT_FD,
+ map_data_enc (uiserver->input_cb.data));
+ if (err)
+ {
+ free (cmd);
+ return err;
+ }
+ if (plaintext)
+ {
+ /* Normal or cleartext signature. */
+ uiserver->output_cb.data = plaintext;
+ err = uiserver_set_fd (uiserver, OUTPUT_FD, 0);
+ }
+ else
+ {
+ /* Detached signature. */
+ uiserver->message_cb.data = signed_text;
+ err = uiserver_set_fd (uiserver, MESSAGE_FD, 0);
+ }
+ uiserver->inline_data = NULL;
+
+ if (!err)
+ err = start (uiserver, cmd);
+
+ free (cmd);
+ return err;
+}
+
+
+static void
+uiserver_set_status_handler (void *engine, engine_status_handler_t fnc,
+ void *fnc_value)
+{
+ engine_uiserver_t uiserver = engine;
+
+ uiserver->status.fnc = fnc;
+ uiserver->status.fnc_value = fnc_value;
+}
+
+
+static gpgme_error_t
+uiserver_set_colon_line_handler (void *engine, engine_colon_line_handler_t fnc,
+ void *fnc_value)
+{
+ engine_uiserver_t uiserver = engine;
+
+ uiserver->colon.fnc = fnc;
+ uiserver->colon.fnc_value = fnc_value;
+ uiserver->colon.any = 0;
+ return 0;
+}
+
+
+static void
+uiserver_set_io_cbs (void *engine, gpgme_io_cbs_t io_cbs)
+{
+ engine_uiserver_t uiserver = engine;
+ uiserver->io_cbs = *io_cbs;
+}
+
+
+static void
+uiserver_io_event (void *engine, gpgme_event_io_t type, void *type_data)
+{
+ engine_uiserver_t uiserver = engine;
+
+ TRACE3 (DEBUG_ENGINE, "gpgme:uiserver_io_event", uiserver,
+ "event %p, type %d, type_data %p",
+ uiserver->io_cbs.event, type, type_data);
+ if (uiserver->io_cbs.event)
+ (*uiserver->io_cbs.event) (uiserver->io_cbs.event_priv, type, type_data);
+}
+
+
+struct engine_ops _gpgme_engine_ops_uiserver =
+ {
+ /* Static functions. */
+ _gpgme_get_uiserver_socket_path,
+ NULL,
+ uiserver_get_version,
+ uiserver_get_req_version,
+ uiserver_new,
+
+ /* Member functions. */
+ uiserver_release,
+ uiserver_reset,
+ uiserver_set_status_handler,
+ NULL, /* set_command_handler */
+ uiserver_set_colon_line_handler,
+ uiserver_set_locale,
+ uiserver_set_protocol,
+ uiserver_decrypt,
+ uiserver_decrypt_verify,
+ NULL, /* delete */
+ NULL, /* edit */
+ uiserver_encrypt,
+ NULL, /* encrypt_sign */
+ NULL, /* export */
+ NULL, /* export_ext */
+ NULL, /* genkey */
+ NULL, /* import */
+ NULL, /* keylist */
+ NULL, /* keylist_ext */
+ uiserver_sign,
+ NULL, /* trustlist */
+ uiserver_verify,
+ NULL, /* getauditlog */
+ NULL, /* opassuan_transact */
+ NULL, /* conf_load */
+ NULL, /* conf_save */
+ uiserver_set_io_cbs,
+ uiserver_io_event,
+ uiserver_cancel,
+ NULL /* cancel_op */
+ };
projects / gpgme.git / commitdiff