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7aee3579be
* g10/gpg.c: Add option --no-autostart. * sm/gpgsm.c: Ditto. * g10/options.h (opt): Add field autostart. * sm/gpgsm.h (opt): Ditto. * g10/call-agent.c (start_agent): Print note if agent was not autostarted. * sm/call-agent.c (start_agent): Ditto. * g10/call-dirmngr.c (create_context): Likewise. * sm/call-dirmngr.c (start_dirmngr_ext): Ditto. Signed-off-by: Werner Koch <wk@gnupg.org>
1268 lines
30 KiB
C
1268 lines
30 KiB
C
/* call-agent.c - Divert GPGSM operations to the agent
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* Copyright (C) 2001, 2002, 2003, 2005, 2007,
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* 2008, 2009, 2010 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <time.h>
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#include <assert.h>
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#include "gpgsm.h"
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#include <gcrypt.h>
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#include <assuan.h>
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#include "i18n.h"
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#include "asshelp.h"
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#include "keydb.h" /* fixme: Move this to import.c */
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#include "membuf.h"
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static assuan_context_t agent_ctx = NULL;
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struct cipher_parm_s
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{
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ctrl_t ctrl;
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assuan_context_t ctx;
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const unsigned char *ciphertext;
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size_t ciphertextlen;
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};
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struct genkey_parm_s
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{
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ctrl_t ctrl;
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assuan_context_t ctx;
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const unsigned char *sexp;
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size_t sexplen;
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};
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struct learn_parm_s
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{
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int error;
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ctrl_t ctrl;
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assuan_context_t ctx;
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membuf_t *data;
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};
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struct import_key_parm_s
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{
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ctrl_t ctrl;
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assuan_context_t ctx;
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const void *key;
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size_t keylen;
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};
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/* Try to connect to the agent via socket or fork it off and work by
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pipes. Handle the server's initial greeting */
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static int
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start_agent (ctrl_t ctrl)
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{
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int rc;
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if (agent_ctx)
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rc = 0; /* fixme: We need a context for each thread or
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serialize the access to the agent (which is
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suitable given that the agent is not MT. */
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else
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{
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rc = start_new_gpg_agent (&agent_ctx,
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GPG_ERR_SOURCE_DEFAULT,
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opt.homedir,
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opt.agent_program,
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opt.lc_ctype, opt.lc_messages,
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opt.session_env,
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opt.autostart, opt.verbose, DBG_ASSUAN,
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gpgsm_status2, ctrl);
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if (!opt.autostart && gpg_err_code (rc) == GPG_ERR_NO_AGENT)
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{
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static int shown;
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if (!shown)
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{
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shown = 1;
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log_info (_("no gpg-agent running in this session\n"));
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}
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}
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else if (!rc)
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{
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/* Tell the agent that we support Pinentry notifications. No
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error checking so that it will work also with older
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agents. */
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assuan_transact (agent_ctx, "OPTION allow-pinentry-notify",
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NULL, NULL, NULL, NULL, NULL, NULL);
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}
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}
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if (!ctrl->agent_seen)
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{
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ctrl->agent_seen = 1;
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audit_log_ok (ctrl->audit, AUDIT_AGENT_READY, rc);
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}
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return rc;
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}
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static gpg_error_t
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membuf_data_cb (void *opaque, const void *buffer, size_t length)
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{
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membuf_t *data = opaque;
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if (buffer)
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put_membuf (data, buffer, length);
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return 0;
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}
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/* This is the default inquiry callback. It mainly handles the
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Pinentry notifications. */
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static gpg_error_t
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default_inq_cb (void *opaque, const char *line)
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{
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gpg_error_t err;
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ctrl_t ctrl = opaque;
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if (has_leading_keyword (line, "PINENTRY_LAUNCHED"))
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{
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err = gpgsm_proxy_pinentry_notify (ctrl, line);
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if (err)
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log_error (_("failed to proxy %s inquiry to client\n"),
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"PINENTRY_LAUNCHED");
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/* We do not pass errors to avoid breaking other code. */
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}
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else
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log_error ("ignoring gpg-agent inquiry '%s'\n", line);
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return 0;
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}
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/* Call the agent to do a sign operation using the key identified by
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the hex string KEYGRIP. */
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int
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gpgsm_agent_pksign (ctrl_t ctrl, const char *keygrip, const char *desc,
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unsigned char *digest, size_t digestlen, int digestalgo,
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unsigned char **r_buf, size_t *r_buflen )
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{
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int rc, i;
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char *p, line[ASSUAN_LINELENGTH];
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membuf_t data;
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size_t len;
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*r_buf = NULL;
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rc = start_agent (ctrl);
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if (rc)
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return rc;
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if (digestlen*2 + 50 > DIM(line))
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return gpg_error (GPG_ERR_GENERAL);
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rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
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if (rc)
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return rc;
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snprintf (line, DIM(line)-1, "SIGKEY %s", keygrip);
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line[DIM(line)-1] = 0;
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rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
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if (rc)
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return rc;
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if (desc)
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{
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snprintf (line, DIM(line)-1, "SETKEYDESC %s", desc);
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line[DIM(line)-1] = 0;
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rc = assuan_transact (agent_ctx, line,
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NULL, NULL, NULL, NULL, NULL, NULL);
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if (rc)
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return rc;
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}
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sprintf (line, "SETHASH %d ", digestalgo);
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p = line + strlen (line);
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for (i=0; i < digestlen ; i++, p += 2 )
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sprintf (p, "%02X", digest[i]);
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rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
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if (rc)
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return rc;
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init_membuf (&data, 1024);
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rc = assuan_transact (agent_ctx, "PKSIGN",
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membuf_data_cb, &data, default_inq_cb, ctrl,
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NULL, NULL);
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if (rc)
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{
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xfree (get_membuf (&data, &len));
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return rc;
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}
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*r_buf = get_membuf (&data, r_buflen);
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if (!gcry_sexp_canon_len (*r_buf, *r_buflen, NULL, NULL))
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{
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xfree (*r_buf); *r_buf = NULL;
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return gpg_error (GPG_ERR_INV_VALUE);
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}
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return *r_buf? 0 : out_of_core ();
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}
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/* Call the scdaemon to do a sign operation using the key identified by
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the hex string KEYID. */
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int
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gpgsm_scd_pksign (ctrl_t ctrl, const char *keyid, const char *desc,
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unsigned char *digest, size_t digestlen, int digestalgo,
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unsigned char **r_buf, size_t *r_buflen )
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{
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int rc, i;
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char *p, line[ASSUAN_LINELENGTH];
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membuf_t data;
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size_t len;
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const char *hashopt;
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unsigned char *sigbuf;
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size_t sigbuflen;
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(void)desc;
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*r_buf = NULL;
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switch(digestalgo)
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{
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case GCRY_MD_SHA1: hashopt = "--hash=sha1"; break;
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case GCRY_MD_RMD160:hashopt = "--hash=rmd160"; break;
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case GCRY_MD_MD5: hashopt = "--hash=md5"; break;
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case GCRY_MD_SHA256:hashopt = "--hash=sha256"; break;
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default:
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return gpg_error (GPG_ERR_DIGEST_ALGO);
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}
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rc = start_agent (ctrl);
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if (rc)
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return rc;
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if (digestlen*2 + 50 > DIM(line))
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return gpg_error (GPG_ERR_GENERAL);
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p = stpcpy (line, "SCD SETDATA " );
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for (i=0; i < digestlen ; i++, p += 2 )
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sprintf (p, "%02X", digest[i]);
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rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
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if (rc)
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return rc;
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init_membuf (&data, 1024);
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snprintf (line, DIM(line)-1, "SCD PKSIGN %s %s", hashopt, keyid);
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line[DIM(line)-1] = 0;
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rc = assuan_transact (agent_ctx, line,
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membuf_data_cb, &data, default_inq_cb, ctrl,
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NULL, NULL);
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if (rc)
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{
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xfree (get_membuf (&data, &len));
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return rc;
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}
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sigbuf = get_membuf (&data, &sigbuflen);
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/* Create an S-expression from it which is formatted like this:
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"(7:sig-val(3:rsa(1:sSIGBUFLEN:SIGBUF)))" Fixme: If a card ever
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creates non-RSA keys we need to change things. */
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*r_buflen = 21 + 11 + sigbuflen + 4;
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p = xtrymalloc (*r_buflen);
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*r_buf = (unsigned char*)p;
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if (!p)
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{
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xfree (sigbuf);
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return 0;
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}
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p = stpcpy (p, "(7:sig-val(3:rsa(1:s" );
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sprintf (p, "%u:", (unsigned int)sigbuflen);
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p += strlen (p);
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memcpy (p, sigbuf, sigbuflen);
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p += sigbuflen;
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strcpy (p, ")))");
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xfree (sigbuf);
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assert (gcry_sexp_canon_len (*r_buf, *r_buflen, NULL, NULL));
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return 0;
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}
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/* Handle a CIPHERTEXT inquiry. Note, we only send the data,
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assuan_transact takes care of flushing and writing the end */
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static gpg_error_t
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inq_ciphertext_cb (void *opaque, const char *line)
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{
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struct cipher_parm_s *parm = opaque;
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int rc;
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if (has_leading_keyword (line, "CIPHERTEXT"))
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{
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assuan_begin_confidential (parm->ctx);
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rc = assuan_send_data (parm->ctx, parm->ciphertext, parm->ciphertextlen);
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assuan_end_confidential (parm->ctx);
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}
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else
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rc = default_inq_cb (parm->ctrl, line);
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return rc;
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}
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/* Call the agent to do a decrypt operation using the key identified by
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the hex string KEYGRIP. */
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int
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gpgsm_agent_pkdecrypt (ctrl_t ctrl, const char *keygrip, const char *desc,
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ksba_const_sexp_t ciphertext,
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char **r_buf, size_t *r_buflen )
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{
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int rc;
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char line[ASSUAN_LINELENGTH];
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membuf_t data;
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struct cipher_parm_s cipher_parm;
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size_t n, len;
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char *p, *buf, *endp;
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size_t ciphertextlen;
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if (!keygrip || strlen(keygrip) != 40 || !ciphertext || !r_buf || !r_buflen)
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return gpg_error (GPG_ERR_INV_VALUE);
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*r_buf = NULL;
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ciphertextlen = gcry_sexp_canon_len (ciphertext, 0, NULL, NULL);
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if (!ciphertextlen)
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return gpg_error (GPG_ERR_INV_VALUE);
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rc = start_agent (ctrl);
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if (rc)
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return rc;
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rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
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if (rc)
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return rc;
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assert ( DIM(line) >= 50 );
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snprintf (line, DIM(line)-1, "SETKEY %s", keygrip);
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line[DIM(line)-1] = 0;
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rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
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if (rc)
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return rc;
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if (desc)
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{
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snprintf (line, DIM(line)-1, "SETKEYDESC %s", desc);
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line[DIM(line)-1] = 0;
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rc = assuan_transact (agent_ctx, line,
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NULL, NULL, NULL, NULL, NULL, NULL);
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if (rc)
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return rc;
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}
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init_membuf (&data, 1024);
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cipher_parm.ctrl = ctrl;
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cipher_parm.ctx = agent_ctx;
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cipher_parm.ciphertext = ciphertext;
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cipher_parm.ciphertextlen = ciphertextlen;
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rc = assuan_transact (agent_ctx, "PKDECRYPT",
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membuf_data_cb, &data,
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inq_ciphertext_cb, &cipher_parm, NULL, NULL);
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if (rc)
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{
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xfree (get_membuf (&data, &len));
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return rc;
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}
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put_membuf (&data, "", 1); /* Make sure it is 0 terminated. */
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buf = get_membuf (&data, &len);
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if (!buf)
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return gpg_error (GPG_ERR_ENOMEM);
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assert (len); /* (we forced Nul termination.) */
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if (*buf == '(')
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{
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if (len < 13 || memcmp (buf, "(5:value", 8) ) /* "(5:valueN:D)\0" */
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return gpg_error (GPG_ERR_INV_SEXP);
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len -= 11; /* Count only the data of the second part. */
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p = buf + 8; /* Skip leading parenthesis and the value tag. */
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}
|
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else
|
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{
|
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/* For compatibility with older gpg-agents handle the old style
|
||
incomplete S-exps. */
|
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len--; /* Do not count the Nul. */
|
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p = buf;
|
||
}
|
||
|
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n = strtoul (p, &endp, 10);
|
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if (!n || *endp != ':')
|
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return gpg_error (GPG_ERR_INV_SEXP);
|
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endp++;
|
||
if (endp-p+n > len)
|
||
return gpg_error (GPG_ERR_INV_SEXP); /* Oops: Inconsistent S-Exp. */
|
||
|
||
memmove (buf, endp, n);
|
||
|
||
*r_buflen = n;
|
||
*r_buf = buf;
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
|
||
|
||
/* Handle a KEYPARMS inquiry. Note, we only send the data,
|
||
assuan_transact takes care of flushing and writing the end */
|
||
static gpg_error_t
|
||
inq_genkey_parms (void *opaque, const char *line)
|
||
{
|
||
struct genkey_parm_s *parm = opaque;
|
||
int rc;
|
||
|
||
if (has_leading_keyword (line, "KEYPARAM"))
|
||
{
|
||
rc = assuan_send_data (parm->ctx, parm->sexp, parm->sexplen);
|
||
}
|
||
else
|
||
rc = default_inq_cb (parm->ctrl, line);
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
/* Call the agent to generate a newkey */
|
||
int
|
||
gpgsm_agent_genkey (ctrl_t ctrl,
|
||
ksba_const_sexp_t keyparms, ksba_sexp_t *r_pubkey)
|
||
{
|
||
int rc;
|
||
struct genkey_parm_s gk_parm;
|
||
membuf_t data;
|
||
size_t len;
|
||
unsigned char *buf;
|
||
|
||
*r_pubkey = NULL;
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return rc;
|
||
|
||
init_membuf (&data, 1024);
|
||
gk_parm.ctrl = ctrl;
|
||
gk_parm.ctx = agent_ctx;
|
||
gk_parm.sexp = keyparms;
|
||
gk_parm.sexplen = gcry_sexp_canon_len (keyparms, 0, NULL, NULL);
|
||
if (!gk_parm.sexplen)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
rc = assuan_transact (agent_ctx, "GENKEY",
|
||
membuf_data_cb, &data,
|
||
inq_genkey_parms, &gk_parm, NULL, NULL);
|
||
if (rc)
|
||
{
|
||
xfree (get_membuf (&data, &len));
|
||
return rc;
|
||
}
|
||
buf = get_membuf (&data, &len);
|
||
if (!buf)
|
||
return gpg_error (GPG_ERR_ENOMEM);
|
||
if (!gcry_sexp_canon_len (buf, len, NULL, NULL))
|
||
{
|
||
xfree (buf);
|
||
return gpg_error (GPG_ERR_INV_SEXP);
|
||
}
|
||
*r_pubkey = buf;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Call the agent to read the public key part for a given keygrip. If
|
||
FROMCARD is true, the key is directly read from the current
|
||
smartcard. In this case HEXKEYGRIP should be the keyID
|
||
(e.g. OPENPGP.3). */
|
||
int
|
||
gpgsm_agent_readkey (ctrl_t ctrl, int fromcard, const char *hexkeygrip,
|
||
ksba_sexp_t *r_pubkey)
|
||
{
|
||
int rc;
|
||
membuf_t data;
|
||
size_t len;
|
||
unsigned char *buf;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
*r_pubkey = NULL;
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = assuan_transact (agent_ctx, "RESET",NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return rc;
|
||
|
||
snprintf (line, DIM(line)-1, "%sREADKEY %s",
|
||
fromcard? "SCD ":"", hexkeygrip);
|
||
line[DIM(line)-1] = 0;
|
||
|
||
init_membuf (&data, 1024);
|
||
rc = assuan_transact (agent_ctx, line,
|
||
membuf_data_cb, &data,
|
||
default_inq_cb, ctrl, NULL, NULL);
|
||
if (rc)
|
||
{
|
||
xfree (get_membuf (&data, &len));
|
||
return rc;
|
||
}
|
||
buf = get_membuf (&data, &len);
|
||
if (!buf)
|
||
return gpg_error (GPG_ERR_ENOMEM);
|
||
if (!gcry_sexp_canon_len (buf, len, NULL, NULL))
|
||
{
|
||
xfree (buf);
|
||
return gpg_error (GPG_ERR_INV_SEXP);
|
||
}
|
||
*r_pubkey = buf;
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
/* Take the serial number from LINE and return it verbatim in a newly
|
||
allocated string. We make sure that only hex characters are
|
||
returned. */
|
||
static char *
|
||
store_serialno (const char *line)
|
||
{
|
||
const char *s;
|
||
char *p;
|
||
|
||
for (s=line; hexdigitp (s); s++)
|
||
;
|
||
p = xtrymalloc (s + 1 - line);
|
||
if (p)
|
||
{
|
||
memcpy (p, line, s-line);
|
||
p[s-line] = 0;
|
||
}
|
||
return p;
|
||
}
|
||
|
||
|
||
/* Callback for the gpgsm_agent_serialno fucntion. */
|
||
static gpg_error_t
|
||
scd_serialno_status_cb (void *opaque, const char *line)
|
||
{
|
||
char **r_serialno = opaque;
|
||
const char *keyword = line;
|
||
int keywordlen;
|
||
|
||
for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
|
||
;
|
||
while (spacep (line))
|
||
line++;
|
||
|
||
if (keywordlen == 8 && !memcmp (keyword, "SERIALNO", keywordlen))
|
||
{
|
||
xfree (*r_serialno);
|
||
*r_serialno = store_serialno (line);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Call the agent to read the serial number of the current card. */
|
||
int
|
||
gpgsm_agent_scd_serialno (ctrl_t ctrl, char **r_serialno)
|
||
{
|
||
int rc;
|
||
char *serialno = NULL;
|
||
|
||
*r_serialno = NULL;
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = assuan_transact (agent_ctx, "SCD SERIALNO",
|
||
NULL, NULL,
|
||
default_inq_cb, ctrl,
|
||
scd_serialno_status_cb, &serialno);
|
||
if (!rc && !serialno)
|
||
rc = gpg_error (GPG_ERR_INTERNAL);
|
||
if (rc)
|
||
{
|
||
xfree (serialno);
|
||
return rc;
|
||
}
|
||
*r_serialno = serialno;
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
/* Callback for the gpgsm_agent_serialno fucntion. */
|
||
static gpg_error_t
|
||
scd_keypairinfo_status_cb (void *opaque, const char *line)
|
||
{
|
||
strlist_t *listaddr = opaque;
|
||
const char *keyword = line;
|
||
int keywordlen;
|
||
strlist_t sl;
|
||
char *p;
|
||
|
||
for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
|
||
;
|
||
while (spacep (line))
|
||
line++;
|
||
|
||
if (keywordlen == 11 && !memcmp (keyword, "KEYPAIRINFO", keywordlen))
|
||
{
|
||
sl = append_to_strlist (listaddr, line);
|
||
p = sl->d;
|
||
/* Make sure that we only have two tokes so that future
|
||
extensions of the format won't change the format expected by
|
||
the caller. */
|
||
while (*p && !spacep (p))
|
||
p++;
|
||
if (*p)
|
||
{
|
||
while (spacep (p))
|
||
p++;
|
||
while (*p && !spacep (p))
|
||
p++;
|
||
*p = 0;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Call the agent to read the keypairinfo lines of the current card.
|
||
The list is returned as a string made up of the keygrip, a space
|
||
and the keyid. */
|
||
int
|
||
gpgsm_agent_scd_keypairinfo (ctrl_t ctrl, strlist_t *r_list)
|
||
{
|
||
int rc;
|
||
strlist_t list = NULL;
|
||
|
||
*r_list = NULL;
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = assuan_transact (agent_ctx, "SCD LEARN --force",
|
||
NULL, NULL,
|
||
default_inq_cb, ctrl,
|
||
scd_keypairinfo_status_cb, &list);
|
||
if (!rc && !list)
|
||
rc = gpg_error (GPG_ERR_NO_DATA);
|
||
if (rc)
|
||
{
|
||
free_strlist (list);
|
||
return rc;
|
||
}
|
||
*r_list = list;
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
static gpg_error_t
|
||
istrusted_status_cb (void *opaque, const char *line)
|
||
{
|
||
struct rootca_flags_s *flags = opaque;
|
||
const char *s;
|
||
|
||
if ((s = has_leading_keyword (line, "TRUSTLISTFLAG")))
|
||
{
|
||
line = s;
|
||
if (has_leading_keyword (line, "relax"))
|
||
flags->relax = 1;
|
||
else if (has_leading_keyword (line, "cm"))
|
||
flags->chain_model = 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
/* Ask the agent whether the certificate is in the list of trusted
|
||
keys. The certificate is either specified by the CERT object or by
|
||
the fingerprint HEXFPR. ROOTCA_FLAGS is guaranteed to be cleared
|
||
on error. */
|
||
int
|
||
gpgsm_agent_istrusted (ctrl_t ctrl, ksba_cert_t cert, const char *hexfpr,
|
||
struct rootca_flags_s *rootca_flags)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
memset (rootca_flags, 0, sizeof *rootca_flags);
|
||
|
||
if (cert && hexfpr)
|
||
return gpg_error (GPG_ERR_INV_ARG);
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
if (hexfpr)
|
||
{
|
||
snprintf (line, DIM(line)-1, "ISTRUSTED %s", hexfpr);
|
||
line[DIM(line)-1] = 0;
|
||
}
|
||
else
|
||
{
|
||
char *fpr;
|
||
|
||
fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
|
||
if (!fpr)
|
||
{
|
||
log_error ("error getting the fingerprint\n");
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
|
||
snprintf (line, DIM(line)-1, "ISTRUSTED %s", fpr);
|
||
line[DIM(line)-1] = 0;
|
||
xfree (fpr);
|
||
}
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL,
|
||
istrusted_status_cb, rootca_flags);
|
||
if (!rc)
|
||
rootca_flags->valid = 1;
|
||
return rc;
|
||
}
|
||
|
||
/* Ask the agent to mark CERT as a trusted Root-CA one */
|
||
int
|
||
gpgsm_agent_marktrusted (ctrl_t ctrl, ksba_cert_t cert)
|
||
{
|
||
int rc;
|
||
char *fpr, *dn, *dnfmt;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
|
||
if (!fpr)
|
||
{
|
||
log_error ("error getting the fingerprint\n");
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
|
||
dn = ksba_cert_get_issuer (cert, 0);
|
||
if (!dn)
|
||
{
|
||
xfree (fpr);
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
}
|
||
dnfmt = gpgsm_format_name2 (dn, 0);
|
||
xfree (dn);
|
||
if (!dnfmt)
|
||
return gpg_error_from_syserror ();
|
||
snprintf (line, DIM(line)-1, "MARKTRUSTED %s S %s", fpr, dnfmt);
|
||
line[DIM(line)-1] = 0;
|
||
ksba_free (dnfmt);
|
||
xfree (fpr);
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL,
|
||
default_inq_cb, ctrl, NULL, NULL);
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
/* Ask the agent whether the a corresponding secret key is available
|
||
for the given keygrip */
|
||
int
|
||
gpgsm_agent_havekey (ctrl_t ctrl, const char *hexkeygrip)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
if (!hexkeygrip || strlen (hexkeygrip) != 40)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
snprintf (line, DIM(line)-1, "HAVEKEY %s", hexkeygrip);
|
||
line[DIM(line)-1] = 0;
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
|
||
return rc;
|
||
}
|
||
|
||
|
||
static gpg_error_t
|
||
learn_status_cb (void *opaque, const char *line)
|
||
{
|
||
struct learn_parm_s *parm = opaque;
|
||
const char *s;
|
||
|
||
/* Pass progress data to the caller. */
|
||
if ((s = has_leading_keyword (line, "PROGRESS")))
|
||
{
|
||
line = s;
|
||
if (parm->ctrl)
|
||
{
|
||
if (gpgsm_status (parm->ctrl, STATUS_PROGRESS, line))
|
||
return gpg_error (GPG_ERR_ASS_CANCELED);
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static gpg_error_t
|
||
learn_cb (void *opaque, const void *buffer, size_t length)
|
||
{
|
||
struct learn_parm_s *parm = opaque;
|
||
size_t len;
|
||
char *buf;
|
||
ksba_cert_t cert;
|
||
int rc;
|
||
|
||
if (parm->error)
|
||
return 0;
|
||
|
||
if (buffer)
|
||
{
|
||
put_membuf (parm->data, buffer, length);
|
||
return 0;
|
||
}
|
||
/* END encountered - process what we have */
|
||
buf = get_membuf (parm->data, &len);
|
||
if (!buf)
|
||
{
|
||
parm->error = gpg_error (GPG_ERR_ENOMEM);
|
||
return 0;
|
||
}
|
||
|
||
if (gpgsm_status (parm->ctrl, STATUS_PROGRESS, "learncard C 0 0"))
|
||
return gpg_error (GPG_ERR_ASS_CANCELED);
|
||
|
||
/* FIXME: this should go into import.c */
|
||
rc = ksba_cert_new (&cert);
|
||
if (rc)
|
||
{
|
||
parm->error = rc;
|
||
return 0;
|
||
}
|
||
rc = ksba_cert_init_from_mem (cert, buf, len);
|
||
if (rc)
|
||
{
|
||
log_error ("failed to parse a certificate: %s\n", gpg_strerror (rc));
|
||
ksba_cert_release (cert);
|
||
parm->error = rc;
|
||
return 0;
|
||
}
|
||
|
||
/* We do not store a certifciate with missing issuers as ephemeral
|
||
because we can assume that the --learn-card command has been used
|
||
on purpose. */
|
||
rc = gpgsm_basic_cert_check (parm->ctrl, cert);
|
||
if (rc && gpg_err_code (rc) != GPG_ERR_MISSING_CERT
|
||
&& gpg_err_code (rc) != GPG_ERR_MISSING_ISSUER_CERT)
|
||
log_error ("invalid certificate: %s\n", gpg_strerror (rc));
|
||
else
|
||
{
|
||
int existed;
|
||
|
||
if (!keydb_store_cert (cert, 0, &existed))
|
||
{
|
||
if (opt.verbose > 1 && existed)
|
||
log_info ("certificate already in DB\n");
|
||
else if (opt.verbose && !existed)
|
||
log_info ("certificate imported\n");
|
||
}
|
||
}
|
||
|
||
ksba_cert_release (cert);
|
||
init_membuf (parm->data, 4096);
|
||
return 0;
|
||
}
|
||
|
||
/* Call the agent to learn about a smartcard */
|
||
int
|
||
gpgsm_agent_learn (ctrl_t ctrl)
|
||
{
|
||
int rc;
|
||
struct learn_parm_s learn_parm;
|
||
membuf_t data;
|
||
size_t len;
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
init_membuf (&data, 4096);
|
||
learn_parm.error = 0;
|
||
learn_parm.ctrl = ctrl;
|
||
learn_parm.ctx = agent_ctx;
|
||
learn_parm.data = &data;
|
||
rc = assuan_transact (agent_ctx, "LEARN --send",
|
||
learn_cb, &learn_parm,
|
||
NULL, NULL,
|
||
learn_status_cb, &learn_parm);
|
||
xfree (get_membuf (&data, &len));
|
||
if (rc)
|
||
return rc;
|
||
return learn_parm.error;
|
||
}
|
||
|
||
|
||
/* Ask the agent to change the passphrase of the key identified by
|
||
HEXKEYGRIP. If DESC is not NULL, display instead of the default
|
||
description message. */
|
||
int
|
||
gpgsm_agent_passwd (ctrl_t ctrl, const char *hexkeygrip, const char *desc)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
if (!hexkeygrip || strlen (hexkeygrip) != 40)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
if (desc)
|
||
{
|
||
snprintf (line, DIM(line)-1, "SETKEYDESC %s", desc);
|
||
line[DIM(line)-1] = 0;
|
||
rc = assuan_transact (agent_ctx, line,
|
||
NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return rc;
|
||
}
|
||
|
||
snprintf (line, DIM(line)-1, "PASSWD %s", hexkeygrip);
|
||
line[DIM(line)-1] = 0;
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL,
|
||
default_inq_cb, ctrl, NULL, NULL);
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
/* Ask the agent to pop up a confirmation dialog with the text DESC
|
||
and an okay and cancel button. */
|
||
gpg_error_t
|
||
gpgsm_agent_get_confirmation (ctrl_t ctrl, const char *desc)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
snprintf (line, DIM(line)-1, "GET_CONFIRMATION %s", desc);
|
||
line[DIM(line)-1] = 0;
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL,
|
||
default_inq_cb, ctrl, NULL, NULL);
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
/* Return 0 if the agent is alive. This is useful to make sure that
|
||
an agent has been started. */
|
||
gpg_error_t
|
||
gpgsm_agent_send_nop (ctrl_t ctrl)
|
||
{
|
||
int rc;
|
||
|
||
rc = start_agent (ctrl);
|
||
if (!rc)
|
||
rc = assuan_transact (agent_ctx, "NOP",
|
||
NULL, NULL, NULL, NULL, NULL, NULL);
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
static gpg_error_t
|
||
keyinfo_status_cb (void *opaque, const char *line)
|
||
{
|
||
char **serialno = opaque;
|
||
const char *s, *s2;
|
||
|
||
if ((s = has_leading_keyword (line, "KEYINFO")) && !*serialno)
|
||
{
|
||
s = strchr (s, ' ');
|
||
if (s && s[1] == 'T' && s[2] == ' ' && s[3])
|
||
{
|
||
s += 3;
|
||
s2 = strchr (s, ' ');
|
||
if ( s2 > s )
|
||
{
|
||
*serialno = xtrymalloc ((s2 - s)+1);
|
||
if (*serialno)
|
||
{
|
||
memcpy (*serialno, s, s2 - s);
|
||
(*serialno)[s2 - s] = 0;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Return the serial number for a secret key. If the returned serial
|
||
number is NULL, the key is not stored on a smartcard. Caller needs
|
||
to free R_SERIALNO. */
|
||
gpg_error_t
|
||
gpgsm_agent_keyinfo (ctrl_t ctrl, const char *hexkeygrip, char **r_serialno)
|
||
{
|
||
gpg_error_t err;
|
||
char line[ASSUAN_LINELENGTH];
|
||
char *serialno = NULL;
|
||
|
||
*r_serialno = NULL;
|
||
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
|
||
if (!hexkeygrip || strlen (hexkeygrip) != 40)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
snprintf (line, DIM(line)-1, "KEYINFO %s", hexkeygrip);
|
||
line[DIM(line)-1] = 0;
|
||
|
||
err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL,
|
||
keyinfo_status_cb, &serialno);
|
||
if (!err && serialno)
|
||
{
|
||
/* Sanity check for bad characters. */
|
||
if (strpbrk (serialno, ":\n\r"))
|
||
err = GPG_ERR_INV_VALUE;
|
||
}
|
||
if (err)
|
||
xfree (serialno);
|
||
else
|
||
*r_serialno = serialno;
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
/* Ask for the passphrase (this is used for pkcs#12 import/export. On
|
||
success the caller needs to free the string stored at R_PASSPHRASE.
|
||
On error NULL will be stored at R_PASSPHRASE and an appropriate
|
||
error code returned. If REPEAT is true the agent tries to get a
|
||
new passphrase (i.e. asks the user to confirm it). */
|
||
gpg_error_t
|
||
gpgsm_agent_ask_passphrase (ctrl_t ctrl, const char *desc_msg, int repeat,
|
||
char **r_passphrase)
|
||
{
|
||
gpg_error_t err;
|
||
char line[ASSUAN_LINELENGTH];
|
||
char *arg4 = NULL;
|
||
membuf_t data;
|
||
|
||
*r_passphrase = NULL;
|
||
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
|
||
if (desc_msg && *desc_msg && !(arg4 = percent_plus_escape (desc_msg)))
|
||
return gpg_error_from_syserror ();
|
||
|
||
snprintf (line, DIM(line)-1, "GET_PASSPHRASE --data%s -- X X X %s",
|
||
repeat? " --repeat=1 --check --qualitybar":"",
|
||
arg4);
|
||
xfree (arg4);
|
||
|
||
init_membuf_secure (&data, 64);
|
||
err = assuan_transact (agent_ctx, line,
|
||
membuf_data_cb, &data,
|
||
default_inq_cb, NULL, NULL, NULL);
|
||
|
||
if (err)
|
||
xfree (get_membuf (&data, NULL));
|
||
else
|
||
{
|
||
put_membuf (&data, "", 1);
|
||
*r_passphrase = get_membuf (&data, NULL);
|
||
if (!*r_passphrase)
|
||
err = gpg_error_from_syserror ();
|
||
}
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
/* Retrieve a key encryption key from the agent. With FOREXPORT true
|
||
the key shall be use for export, with false for import. On success
|
||
the new key is stored at R_KEY and its length at R_KEKLEN. */
|
||
gpg_error_t
|
||
gpgsm_agent_keywrap_key (ctrl_t ctrl, int forexport,
|
||
void **r_kek, size_t *r_keklen)
|
||
{
|
||
gpg_error_t err;
|
||
membuf_t data;
|
||
size_t len;
|
||
unsigned char *buf;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
*r_kek = NULL;
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
|
||
snprintf (line, DIM(line)-1, "KEYWRAP_KEY %s",
|
||
forexport? "--export":"--import");
|
||
|
||
init_membuf_secure (&data, 64);
|
||
err = assuan_transact (agent_ctx, line,
|
||
membuf_data_cb, &data,
|
||
default_inq_cb, ctrl, NULL, NULL);
|
||
if (err)
|
||
{
|
||
xfree (get_membuf (&data, &len));
|
||
return err;
|
||
}
|
||
buf = get_membuf (&data, &len);
|
||
if (!buf)
|
||
return gpg_error_from_syserror ();
|
||
*r_kek = buf;
|
||
*r_keklen = len;
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
|
||
/* Handle the inquiry for an IMPORT_KEY command. */
|
||
static gpg_error_t
|
||
inq_import_key_parms (void *opaque, const char *line)
|
||
{
|
||
struct import_key_parm_s *parm = opaque;
|
||
gpg_error_t err;
|
||
|
||
if (has_leading_keyword (line, "KEYDATA"))
|
||
{
|
||
assuan_begin_confidential (parm->ctx);
|
||
err = assuan_send_data (parm->ctx, parm->key, parm->keylen);
|
||
assuan_end_confidential (parm->ctx);
|
||
}
|
||
else
|
||
err = default_inq_cb (parm->ctrl, line);
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Call the agent to import a key into the agent. */
|
||
gpg_error_t
|
||
gpgsm_agent_import_key (ctrl_t ctrl, const void *key, size_t keylen)
|
||
{
|
||
gpg_error_t err;
|
||
struct import_key_parm_s parm;
|
||
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
|
||
parm.ctrl = ctrl;
|
||
parm.ctx = agent_ctx;
|
||
parm.key = key;
|
||
parm.keylen = keylen;
|
||
|
||
err = assuan_transact (agent_ctx, "IMPORT_KEY",
|
||
NULL, NULL, inq_import_key_parms, &parm, NULL, NULL);
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
/* Receive a secret key from the agent. KEYGRIP is the hexified
|
||
keygrip, DESC a prompt to be displayed with the agent's passphrase
|
||
question (needs to be plus+percent escaped). On success the key is
|
||
stored as a canonical S-expression at R_RESULT and R_RESULTLEN. */
|
||
gpg_error_t
|
||
gpgsm_agent_export_key (ctrl_t ctrl, const char *keygrip, const char *desc,
|
||
unsigned char **r_result, size_t *r_resultlen)
|
||
{
|
||
gpg_error_t err;
|
||
membuf_t data;
|
||
size_t len;
|
||
unsigned char *buf;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
*r_result = NULL;
|
||
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
|
||
if (desc)
|
||
{
|
||
snprintf (line, DIM(line)-1, "SETKEYDESC %s", desc);
|
||
err = assuan_transact (agent_ctx, line,
|
||
NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (err)
|
||
return err;
|
||
}
|
||
|
||
snprintf (line, DIM(line)-1, "EXPORT_KEY %s", keygrip);
|
||
|
||
init_membuf_secure (&data, 1024);
|
||
err = assuan_transact (agent_ctx, line,
|
||
membuf_data_cb, &data,
|
||
default_inq_cb, ctrl, NULL, NULL);
|
||
if (err)
|
||
{
|
||
xfree (get_membuf (&data, &len));
|
||
return err;
|
||
}
|
||
buf = get_membuf (&data, &len);
|
||
if (!buf)
|
||
return gpg_error_from_syserror ();
|
||
*r_result = buf;
|
||
*r_resultlen = len;
|
||
return 0;
|
||
}
|