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ec1446f944
* g10/call-agent.c (default_inq_cb): Call assuan_begin_confidential and assuan_end_confidential. * sm/call-agent.c (default_inq_cb): Likewise. -- GnuPG-bug-id: 6654 Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
1506 lines
38 KiB
C
1506 lines
38 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 <https://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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#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 "../common/i18n.h"
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#include "../common/asshelp.h"
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#include "keydb.h" /* fixme: Move this to import.c */
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#include "../common/membuf.h"
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#include "../common/shareddefs.h"
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#include "passphrase.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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struct sethash_inq_parm_s
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{
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assuan_context_t ctx;
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const void *data;
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size_t datalen;
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};
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struct default_inq_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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};
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/* Print a warning if the server's version number is less than our
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version number. Returns an error code on a connection problem. */
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static gpg_error_t
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warn_version_mismatch (ctrl_t ctrl, assuan_context_t ctx,
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const char *servername, int mode)
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{
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return warn_server_version_mismatch (ctx, servername, mode,
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gpgsm_status2, ctrl,
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!opt.quiet);
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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.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?ASSHELP_FLAG_AUTOSTART:0,
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opt.verbose, DBG_IPC,
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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 && !(rc = warn_version_mismatch (ctrl, agent_ctx,
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GPG_AGENT_NAME, 0)))
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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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/* Pass on the pinentry mode. */
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if (opt.pinentry_mode)
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{
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char *tmp = xasprintf ("OPTION pinentry-mode=%s",
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str_pinentry_mode (opt.pinentry_mode));
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rc = assuan_transact (agent_ctx, tmp,
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NULL, NULL, NULL, NULL, NULL, NULL);
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xfree (tmp);
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if (rc)
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log_error ("setting pinentry mode '%s' failed: %s\n",
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str_pinentry_mode (opt.pinentry_mode),
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gpg_strerror (rc));
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}
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/* Pass on the request origin. */
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if (opt.request_origin)
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{
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char *tmp = xasprintf ("OPTION pretend-request-origin=%s",
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str_request_origin (opt.request_origin));
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rc = assuan_transact (agent_ctx, tmp,
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NULL, NULL, NULL, NULL, NULL, NULL);
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xfree (tmp);
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if (rc)
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log_error ("setting request origin '%s' failed: %s\n",
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str_request_origin (opt.request_origin),
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gpg_strerror (rc));
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}
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/* In DE_VS mode under Windows we require that the JENT RNG
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* is active. */
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#ifdef HAVE_W32_SYSTEM
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if (!rc && opt.compliance == CO_DE_VS)
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{
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if (assuan_transact (agent_ctx, "GETINFO jent_active",
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NULL, NULL, NULL, NULL, NULL, NULL))
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{
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rc = gpg_error (GPG_ERR_FORBIDDEN);
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log_error (_("%s is not compliant with %s mode\n"),
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GPG_AGENT_NAME,
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gnupg_compliance_option_string (opt.compliance));
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gpgsm_status_with_error (ctrl, STATUS_ERROR,
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"random-compliance", rc);
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}
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}
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#endif /*HAVE_W32_SYSTEM*/
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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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/* 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 = 0;
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struct default_inq_parm_s *parm = opaque;
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ctrl_t ctrl = parm->ctrl;
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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 if ((has_leading_keyword (line, "PASSPHRASE")
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|| has_leading_keyword (line, "NEW_PASSPHRASE"))
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&& opt.pinentry_mode == PINENTRY_MODE_LOOPBACK
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&& have_static_passphrase ())
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{
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const char *s = get_static_passphrase ();
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assuan_begin_confidential (parm->ctx);
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err = assuan_send_data (parm->ctx, s, strlen (s));
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assuan_end_confidential (parm->ctx);
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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 err;
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}
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/* This is the inquiry callback required by the SETHASH command. */
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static gpg_error_t
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sethash_inq_cb (void *opaque, const char *line)
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{
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gpg_error_t err = 0;
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struct sethash_inq_parm_s *parm = opaque;
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if (has_leading_keyword (line, "TBSDATA"))
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{
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err = assuan_send_data (parm->ctx, parm->data, parm->datalen);
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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 err;
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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. If DIGESTALGO is given (DIGEST,DIGESTLEN)
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* gives the to be signed hash created using the given algo. If
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* DIGESTALGO is not given (i.e. zero) (DIGEST,DIGESTALGO) give the
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* entire data to-be-signed. */
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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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struct default_inq_parm_s inq_parm;
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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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inq_parm.ctrl = ctrl;
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inq_parm.ctx = agent_ctx;
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if (digestalgo && 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), "SIGKEY %s", keygrip);
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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), "SETKEYDESC %s", desc);
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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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if (!digestalgo)
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{
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struct sethash_inq_parm_s sethash_inq_parm;
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sethash_inq_parm.ctx = agent_ctx;
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sethash_inq_parm.data = digest;
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sethash_inq_parm.datalen = digestlen;
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rc = assuan_transact (agent_ctx, "SETHASH --inquire",
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NULL, NULL, sethash_inq_cb, &sethash_inq_parm,
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NULL, NULL);
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}
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else
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{
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snprintf (line, sizeof 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,
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NULL, NULL, NULL, NULL, NULL, NULL);
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}
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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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put_membuf_cb, &data, default_inq_cb, &inq_parm,
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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, pkalgo;
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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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struct default_inq_parm_s inq_parm;
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gcry_sexp_t sig;
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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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case GCRY_MD_SHA512:hashopt = "--hash=sha512"; 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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inq_parm.ctrl = ctrl;
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inq_parm.ctx = agent_ctx;
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|
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if (digestlen*2 + 50 > DIM(line))
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return gpg_error (GPG_ERR_GENERAL);
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/* Get the key type from the scdaemon. */
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snprintf (line, DIM(line), "SCD READKEY %s", keyid);
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init_membuf (&data, 1024);
|
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rc = assuan_transact (agent_ctx, line,
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put_membuf_cb, &data, NULL, NULL, 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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}
|
||
|
||
p = get_membuf (&data, &len);
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||
pkalgo = get_pk_algo_from_canon_sexp (p, len);
|
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xfree (p);
|
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if (!pkalgo)
|
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return gpg_error (GPG_ERR_WRONG_PUBKEY_ALGO);
|
||
|
||
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);
|
||
if (rc)
|
||
return rc;
|
||
|
||
init_membuf (&data, 1024);
|
||
|
||
snprintf (line, DIM(line), "SCD PKSIGN %s %s", hashopt, keyid);
|
||
rc = assuan_transact (agent_ctx, line,
|
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put_membuf_cb, &data, default_inq_cb, &inq_parm,
|
||
NULL, NULL);
|
||
if (rc)
|
||
{
|
||
xfree (get_membuf (&data, &len));
|
||
return rc;
|
||
}
|
||
sigbuf = get_membuf (&data, &sigbuflen);
|
||
|
||
switch(pkalgo)
|
||
{
|
||
case GCRY_PK_RSA:
|
||
rc = gcry_sexp_build (&sig, NULL, "(sig-val(rsa(s%b)))",
|
||
(int)sigbuflen, sigbuf);
|
||
break;
|
||
|
||
case GCRY_PK_ECC:
|
||
rc = gcry_sexp_build (&sig, NULL, "(sig-val(ecdsa(r%b)(s%b)))",
|
||
(int)sigbuflen/2, sigbuf,
|
||
(int)sigbuflen/2, sigbuf + sigbuflen/2);
|
||
break;
|
||
|
||
case GCRY_PK_EDDSA:
|
||
rc = gcry_sexp_build (&sig, NULL, "(sig-val(eddsa(r%b)(s%b)))",
|
||
(int)sigbuflen/2, sigbuf,
|
||
(int)sigbuflen/2, sigbuf + sigbuflen/2);
|
||
break;
|
||
|
||
default:
|
||
rc = gpg_error (GPG_ERR_WRONG_PUBKEY_ALGO);
|
||
break;
|
||
}
|
||
xfree (sigbuf);
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = make_canon_sexp (sig, r_buf, r_buflen);
|
||
gcry_sexp_release (sig);
|
||
if (rc)
|
||
return rc;
|
||
|
||
log_assert (gcry_sexp_canon_len (*r_buf, *r_buflen, NULL, NULL));
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
|
||
/* Handle a CIPHERTEXT inquiry. Note, we only send the data,
|
||
assuan_transact takes care of flushing and writing the end */
|
||
static gpg_error_t
|
||
inq_ciphertext_cb (void *opaque, const char *line)
|
||
{
|
||
struct cipher_parm_s *parm = opaque;
|
||
int rc;
|
||
|
||
if (has_leading_keyword (line, "CIPHERTEXT"))
|
||
{
|
||
assuan_begin_confidential (parm->ctx);
|
||
rc = assuan_send_data (parm->ctx, parm->ciphertext, parm->ciphertextlen);
|
||
assuan_end_confidential (parm->ctx);
|
||
}
|
||
else
|
||
{
|
||
struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
|
||
rc = default_inq_cb (&inq_parm, line);
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
/* Call the agent to do a decrypt operation using the key identified by
|
||
the hex string KEYGRIP. */
|
||
int
|
||
gpgsm_agent_pkdecrypt (ctrl_t ctrl, const char *keygrip, const char *desc,
|
||
ksba_const_sexp_t ciphertext,
|
||
char **r_buf, size_t *r_buflen )
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
membuf_t data;
|
||
struct cipher_parm_s cipher_parm;
|
||
size_t n, len;
|
||
char *p, *buf, *endp;
|
||
size_t ciphertextlen;
|
||
|
||
if (!keygrip || strlen(keygrip) != 40 || !ciphertext || !r_buf || !r_buflen)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
*r_buf = NULL;
|
||
|
||
ciphertextlen = gcry_sexp_canon_len (ciphertext, 0, NULL, NULL);
|
||
if (!ciphertextlen)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return rc;
|
||
|
||
log_assert ( DIM(line) >= 50 );
|
||
snprintf (line, DIM(line), "SETKEY %s", keygrip);
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return rc;
|
||
|
||
if (desc)
|
||
{
|
||
snprintf (line, DIM(line), "SETKEYDESC %s", desc);
|
||
rc = assuan_transact (agent_ctx, line,
|
||
NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return rc;
|
||
}
|
||
|
||
init_membuf (&data, 1024);
|
||
cipher_parm.ctrl = ctrl;
|
||
cipher_parm.ctx = agent_ctx;
|
||
cipher_parm.ciphertext = ciphertext;
|
||
cipher_parm.ciphertextlen = ciphertextlen;
|
||
rc = assuan_transact (agent_ctx, "PKDECRYPT",
|
||
put_membuf_cb, &data,
|
||
inq_ciphertext_cb, &cipher_parm, NULL, NULL);
|
||
if (rc)
|
||
{
|
||
xfree (get_membuf (&data, &len));
|
||
return rc;
|
||
}
|
||
|
||
/* Make sure it is 0 terminated so we can invoke strtoul safely. */
|
||
put_membuf (&data, "", 1);
|
||
buf = get_membuf (&data, &len);
|
||
if (!buf)
|
||
return gpg_error (GPG_ERR_ENOMEM);
|
||
log_assert (len); /* (we forced Nul termination.) */
|
||
|
||
if (*buf == '(')
|
||
{
|
||
if (len < 13 || memcmp (buf, "(5:value", 8) ) /* "(5:valueN:D)\0" */
|
||
return gpg_error (GPG_ERR_INV_SEXP);
|
||
/* Trim any spurious trailing Nuls: */
|
||
while (buf[len-1] == 0)
|
||
len--;
|
||
if (buf[len-1] != ')')
|
||
return gpg_error (GPG_ERR_INV_SEXP);
|
||
len--; /* Drop the final close-paren: */
|
||
p = buf + 8; /* Skip leading parenthesis and the value tag. */
|
||
len -= 8; /* Count only the data of the second part. */
|
||
}
|
||
else
|
||
{
|
||
/* For compatibility with older gpg-agents handle the old style
|
||
incomplete S-exps. */
|
||
len--; /* Do not count the Nul. */
|
||
p = buf;
|
||
}
|
||
|
||
n = strtoul (p, &endp, 10);
|
||
if (!n || *endp != ':')
|
||
return gpg_error (GPG_ERR_INV_SEXP);
|
||
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
|
||
{
|
||
struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
|
||
rc = default_inq_cb (&inq_parm, line);
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
/* Call the agent to generate a new key */
|
||
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;
|
||
gnupg_isotime_t timebuf;
|
||
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;
|
||
|
||
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);
|
||
gnupg_get_isotime (timebuf);
|
||
snprintf (line, sizeof line, "GENKEY --timestamp=%s", timebuf);
|
||
rc = assuan_transact (agent_ctx, line,
|
||
put_membuf_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];
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
*r_pubkey = NULL;
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
rc = assuan_transact (agent_ctx, "RESET",NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return rc;
|
||
|
||
snprintf (line, DIM(line), "%sREADKEY %s",
|
||
fromcard? "SCD ":"", hexkeygrip);
|
||
|
||
init_membuf (&data, 1024);
|
||
rc = assuan_transact (agent_ctx, line,
|
||
put_membuf_cb, &data,
|
||
default_inq_cb, &inq_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;
|
||
}
|
||
|
||
|
||
|
||
/* 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 function. */
|
||
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;
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
*r_serialno = NULL;
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
rc = assuan_transact (agent_ctx, "SCD SERIALNO",
|
||
NULL, NULL,
|
||
default_inq_cb, &inq_parm,
|
||
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 function. */
|
||
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 tokens 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++;
|
||
if (*p)
|
||
{
|
||
*p++ = 0;
|
||
while (spacep (p))
|
||
p++;
|
||
while (*p && !spacep (p))
|
||
{
|
||
switch (*p++)
|
||
{
|
||
case 'c': sl->flags |= GCRY_PK_USAGE_CERT; break;
|
||
case 's': sl->flags |= GCRY_PK_USAGE_SIGN; break;
|
||
case 'e': sl->flags |= GCRY_PK_USAGE_ENCR; break;
|
||
case 'a': sl->flags |= GCRY_PK_USAGE_AUTH; break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
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. The flags of the string carry the usage bits. */
|
||
int
|
||
gpgsm_agent_scd_keypairinfo (ctrl_t ctrl, strlist_t *r_list)
|
||
{
|
||
int rc;
|
||
strlist_t list = NULL;
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
*r_list = NULL;
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
rc = assuan_transact (agent_ctx, "SCD LEARN --keypairinfo",
|
||
NULL, NULL,
|
||
default_inq_cb, &inq_parm,
|
||
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;
|
||
else if (has_leading_keyword (line, "qual"))
|
||
flags->qualified = 1;
|
||
else if (has_leading_keyword (line, "de-vs"))
|
||
flags->de_vs = 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), "ISTRUSTED %s", hexfpr);
|
||
}
|
||
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), "ISTRUSTED %s", fpr);
|
||
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];
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
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), "MARKTRUSTED %s S %s", fpr, dnfmt);
|
||
ksba_free (dnfmt);
|
||
xfree (fpr);
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL,
|
||
default_inq_cb, &inq_parm, 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), "HAVEKEY %s", hexkeygrip);
|
||
|
||
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;
|
||
char *string, *p, *pend;
|
||
strlist_t sl;
|
||
|
||
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;
|
||
}
|
||
|
||
/* Ignore certificates matching certain extended usage flags. */
|
||
rc = ksba_cert_get_ext_key_usages (cert, &string);
|
||
if (!rc)
|
||
{
|
||
p = string;
|
||
while (p && (pend=strchr (p, ':')))
|
||
{
|
||
*pend++ = 0;
|
||
for (sl=opt.ignore_cert_with_oid;
|
||
sl && strcmp (sl->d, p); sl = sl->next)
|
||
;
|
||
if (sl)
|
||
{
|
||
if (opt.verbose)
|
||
log_info ("certificate ignored due to OID %s\n", sl->d);
|
||
goto leave;
|
||
}
|
||
p = pend;
|
||
if ((p = strchr (p, '\n')))
|
||
p++;
|
||
}
|
||
}
|
||
else if (gpg_err_code (rc) != GPG_ERR_NO_DATA)
|
||
log_error (_("error getting key usage information: %s\n"),
|
||
gpg_strerror (rc));
|
||
xfree (string);
|
||
string = NULL;
|
||
|
||
|
||
/* 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 (parm->ctrl, 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");
|
||
}
|
||
}
|
||
|
||
leave:
|
||
xfree (string);
|
||
string = NULL;
|
||
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;
|
||
|
||
rc = warn_version_mismatch (ctrl, agent_ctx, SCDAEMON_NAME, 2);
|
||
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];
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
if (!hexkeygrip || strlen (hexkeygrip) != 40)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
if (desc)
|
||
{
|
||
snprintf (line, DIM(line), "SETKEYDESC %s", desc);
|
||
rc = assuan_transact (agent_ctx, line,
|
||
NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return rc;
|
||
}
|
||
|
||
snprintf (line, DIM(line), "PASSWD %s", hexkeygrip);
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL,
|
||
default_inq_cb, &inq_parm, 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];
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
rc = start_agent (ctrl);
|
||
if (rc)
|
||
return rc;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
snprintf (line, DIM(line), "GET_CONFIRMATION %s", desc);
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL,
|
||
default_inq_cb, &inq_parm, 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), "KEYINFO %s", hexkeygrip);
|
||
|
||
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;
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
*r_passphrase = NULL;
|
||
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
if (desc_msg && *desc_msg && !(arg4 = percent_plus_escape (desc_msg)))
|
||
return gpg_error_from_syserror ();
|
||
|
||
snprintf (line, DIM(line), "GET_PASSPHRASE --data%s -- X X X %s",
|
||
repeat? " --repeat=1 --check":"",
|
||
arg4);
|
||
xfree (arg4);
|
||
|
||
init_membuf_secure (&data, 64);
|
||
err = assuan_transact (agent_ctx, line,
|
||
put_membuf_cb, &data,
|
||
default_inq_cb, &inq_parm, 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];
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
*r_kek = NULL;
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
snprintf (line, DIM(line), "KEYWRAP_KEY %s",
|
||
forexport? "--export":"--import");
|
||
|
||
init_membuf_secure (&data, 64);
|
||
err = assuan_transact (agent_ctx, line,
|
||
put_membuf_cb, &data,
|
||
default_inq_cb, &inq_parm, 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
|
||
{
|
||
struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
|
||
err = default_inq_cb (&inq_parm, 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;
|
||
gnupg_isotime_t timebuf;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
|
||
parm.ctrl = ctrl;
|
||
parm.ctx = agent_ctx;
|
||
parm.key = key;
|
||
parm.keylen = keylen;
|
||
|
||
gnupg_get_isotime (timebuf);
|
||
snprintf (line, sizeof line, "IMPORT_KEY --timestamp=%s", timebuf);
|
||
err = assuan_transact (agent_ctx, line,
|
||
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];
|
||
struct default_inq_parm_s inq_parm;
|
||
|
||
*r_result = NULL;
|
||
|
||
err = start_agent (ctrl);
|
||
if (err)
|
||
return err;
|
||
inq_parm.ctrl = ctrl;
|
||
inq_parm.ctx = agent_ctx;
|
||
|
||
if (desc)
|
||
{
|
||
snprintf (line, DIM(line), "SETKEYDESC %s", desc);
|
||
err = assuan_transact (agent_ctx, line,
|
||
NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (err)
|
||
return err;
|
||
}
|
||
|
||
snprintf (line, DIM(line), "EXPORT_KEY %s", keygrip);
|
||
|
||
init_membuf_secure (&data, 1024);
|
||
err = assuan_transact (agent_ctx, line,
|
||
put_membuf_cb, &data,
|
||
default_inq_cb, &inq_parm, 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;
|
||
}
|