mirror of
git://git.gnupg.org/gnupg.git
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894 lines
22 KiB
C
894 lines
22 KiB
C
/* call-agent.c - divert operations to the agent
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* Copyright (C) 2001, 2002, 2003 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#if 0 /* lety Emacs display a red warning */
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#error fixme: this shares a lof of code with the file in ../sm
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#endif
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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 <assuan.h>
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#include "gpg.h"
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#include "util.h"
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#include "membuf.h"
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#include "options.h"
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#include "i18n.h"
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#include "call-agent.h"
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#ifndef DBG_ASSUAN
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# define DBG_ASSUAN 1
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#endif
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static ASSUAN_CONTEXT agent_ctx = NULL;
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static int force_pipe_server = 1; /* FIXME: set this back to 0. */
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struct cipher_parm_s {
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ASSUAN_CONTEXT ctx;
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const 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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ASSUAN_CONTEXT ctx;
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const char *sexp;
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size_t sexplen;
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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 (void)
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{
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int rc = 0;
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char *infostr, *p;
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ASSUAN_CONTEXT ctx;
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char *dft_display = NULL;
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char *dft_ttyname = NULL;
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char *dft_ttytype = NULL;
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char *old_lc = NULL;
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char *dft_lc = NULL;
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if (agent_ctx)
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return 0; /* fixme: We need a context for each thread or serialize
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the access to the agent. */
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infostr = force_pipe_server? NULL : getenv ("GPG_AGENT_INFO");
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if (!infostr || !*infostr)
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{
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const char *pgmname;
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const char *argv[3];
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int no_close_list[3];
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int i;
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if (opt.verbose)
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log_info (_("no running gpg-agent - starting one\n"));
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if (fflush (NULL))
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{
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gpg_error_t tmperr = gpg_error_from_errno (errno);
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log_error ("error flushing pending output: %s\n", strerror (errno));
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return tmperr;
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}
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if (!opt.agent_program || !*opt.agent_program)
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opt.agent_program = GNUPG_DEFAULT_AGENT;
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if ( !(pgmname = strrchr (opt.agent_program, '/')))
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pgmname = opt.agent_program;
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else
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pgmname++;
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argv[0] = pgmname;
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argv[1] = "--server";
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argv[2] = NULL;
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i=0;
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if (log_get_fd () != -1)
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no_close_list[i++] = log_get_fd ();
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no_close_list[i++] = fileno (stderr);
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no_close_list[i] = -1;
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/* connect to the agent and perform initial handshaking */
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rc = assuan_pipe_connect (&ctx, opt.agent_program, (char**)argv,
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no_close_list);
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}
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else
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{
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int prot;
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int pid;
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infostr = xstrdup (infostr);
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if ( !(p = strchr (infostr, ':')) || p == infostr)
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{
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log_error (_("malformed GPG_AGENT_INFO environment variable\n"));
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xfree (infostr);
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force_pipe_server = 1;
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return start_agent ();
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}
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*p++ = 0;
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pid = atoi (p);
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while (*p && *p != ':')
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p++;
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prot = *p? atoi (p+1) : 0;
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if (prot != 1)
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{
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log_error (_("gpg-agent protocol version %d is not supported\n"),
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prot);
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xfree (infostr);
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force_pipe_server = 1;
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return start_agent ();
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}
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rc = assuan_socket_connect (&ctx, infostr, pid);
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xfree (infostr);
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if (rc == ASSUAN_Connect_Failed)
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{
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log_error (_("can't connect to the agent - trying fall back\n"));
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force_pipe_server = 1;
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return start_agent ();
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}
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}
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if (rc)
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{
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log_error ("can't connect to the agent: %s\n", assuan_strerror (rc));
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return gpg_error (GPG_ERR_NO_AGENT);
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}
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agent_ctx = ctx;
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if (DBG_ASSUAN)
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log_debug ("connection to agent established\n");
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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 map_assuan_err (rc);
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dft_display = getenv ("DISPLAY");
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if (opt.display || dft_display)
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{
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char *optstr;
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if (asprintf (&optstr, "OPTION display=%s",
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opt.display ? opt.display : dft_display) < 0)
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return gpg_error_from_errno (errno);
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rc = assuan_transact (agent_ctx, optstr, NULL, NULL, NULL, NULL, NULL,
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NULL);
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free (optstr);
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if (rc)
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return map_assuan_err (rc);
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}
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if (!opt.ttyname)
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{
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dft_ttyname = getenv ("GPG_TTY");
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if ((!dft_ttyname || !*dft_ttyname) && ttyname (0))
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dft_ttyname = ttyname (0);
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}
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if (opt.ttyname || dft_ttyname)
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{
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char *optstr;
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if (asprintf (&optstr, "OPTION ttyname=%s",
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opt.ttyname ? opt.ttyname : dft_ttyname) < 0)
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return gpg_error_from_errno (errno);
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rc = assuan_transact (agent_ctx, optstr, NULL, NULL, NULL, NULL, NULL,
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NULL);
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free (optstr);
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if (rc)
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return map_assuan_err (rc);
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}
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dft_ttytype = getenv ("TERM");
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if (opt.ttytype || (dft_ttyname && dft_ttytype))
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{
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char *optstr;
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if (asprintf (&optstr, "OPTION ttytype=%s",
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opt.ttyname ? opt.ttytype : dft_ttytype) < 0)
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return gpg_error_from_errno (errno);
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rc = assuan_transact (agent_ctx, optstr, NULL, NULL, NULL, NULL, NULL,
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NULL);
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free (optstr);
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if (rc)
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return map_assuan_err (rc);
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}
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#if defined(HAVE_SETLOCALE) && defined(LC_CTYPE)
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old_lc = setlocale (LC_CTYPE, NULL);
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if (old_lc)
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{
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old_lc = strdup (old_lc);
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if (!old_lc)
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return gpg_error_from_errno (errno);
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}
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dft_lc = setlocale (LC_CTYPE, "");
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#endif
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if (opt.lc_ctype || (dft_ttyname && dft_lc))
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{
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char *optstr;
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if (asprintf (&optstr, "OPTION lc-ctype=%s",
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opt.lc_ctype ? opt.lc_ctype : dft_lc) < 0)
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rc = gpg_error_from_errno (errno);
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else
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{
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rc = assuan_transact (agent_ctx, optstr, NULL, NULL, NULL, NULL, NULL,
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NULL);
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free (optstr);
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if (rc)
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rc = map_assuan_err (rc);
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}
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}
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#if defined(HAVE_SETLOCALE) && defined(LC_CTYPE)
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if (old_lc)
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{
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setlocale (LC_CTYPE, old_lc);
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free (old_lc);
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}
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#endif
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if (rc)
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return rc;
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#if defined(HAVE_SETLOCALE) && defined(LC_MESSAGES)
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old_lc = setlocale (LC_MESSAGES, NULL);
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if (old_lc)
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{
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old_lc = strdup (old_lc);
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if (!old_lc)
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return gpg_error_from_errno (errno);
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}
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dft_lc = setlocale (LC_MESSAGES, "");
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#endif
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if (opt.lc_messages || (dft_ttyname && dft_lc))
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{
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char *optstr;
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if (asprintf (&optstr, "OPTION lc-messages=%s",
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opt.lc_messages ? opt.lc_messages : dft_lc) < 0)
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rc = gpg_error_from_errno (errno);
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else
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{
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rc = assuan_transact (agent_ctx, optstr, NULL, NULL, NULL, NULL, NULL,
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NULL);
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free (optstr);
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if (rc)
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rc = map_assuan_err (rc);
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}
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}
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#if defined(HAVE_SETLOCALE) && defined(LC_MESSAGES)
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if (old_lc)
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{
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setlocale (LC_MESSAGES, old_lc);
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free (old_lc);
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}
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#endif
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return rc;
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}
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/* Return a new malloced string by unescaping the string S. Escaping
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is percent escaping and '+'/space mapping. A binary nul will
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silently be replaced by a 0xFF. Function returns NULL to indicate
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an out of memory status. */
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static char *
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unescape_status_string (const unsigned char *s)
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{
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char *buffer, *d;
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buffer = d = xtrymalloc (strlen (s)+1);
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if (!buffer)
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return NULL;
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while (*s)
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{
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if (*s == '%' && s[1] && s[2])
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{
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s++;
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*d = xtoi_2 (s);
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if (!*d)
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*d = '\xff';
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d++;
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s += 2;
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}
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else if (*s == '+')
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{
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*d++ = ' ';
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s++;
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}
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else
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*d++ = *s++;
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}
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*d = 0;
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return buffer;
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}
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/* Take a 20 byte hexencoded string and put it into the the provided
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20 byte buffer FPR in binary format. */
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static int
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unhexify_fpr (const char *hexstr, unsigned char *fpr)
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{
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const char *s;
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int n;
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for (s=hexstr, n=0; hexdigitp (s); s++, n++)
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;
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if (*s || (n != 40))
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return 0; /* no fingerprint (invalid or wrong length). */
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n /= 2;
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for (s=hexstr, n=0; *s; s += 2, n++)
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fpr[n] = xtoi_2 (s);
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return 1; /* okay */
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}
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/* Take the serial number from LINE and return it verbatim in a newly
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allocated string. We make sure that only hex characters are
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returned. */
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static char *
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store_serialno (const char *line)
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{
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const char *s;
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char *p;
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for (s=line; hexdigitp (s); s++)
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;
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p = xtrymalloc (s + 1 - line);
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if (p)
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{
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memcpy (p, line, s-line);
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p[s-line] = 0;
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}
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return p;
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}
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#if 0
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/* Handle a KEYPARMS 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 AssuanError
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inq_genkey_parms (void *opaque, const char *keyword)
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{
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struct genkey_parm_s *parm = opaque;
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AssuanError rc;
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rc = assuan_send_data (parm->ctx, parm->sexp, parm->sexplen);
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return rc;
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}
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/* Call the agent to generate a new key */
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int
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agent_genkey (KsbaConstSexp keyparms, KsbaSexp *r_pubkey)
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{
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int rc;
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struct genkey_parm_s gk_parm;
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membuf_t data;
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size_t len;
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char *buf;
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*r_pubkey = NULL;
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rc = start_agent ();
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if (rc)
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return rc;
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rc = assuan_transact (agent_ctx, "RESET", NULL, NULL,
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NULL, NULL, NULL, NULL);
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if (rc)
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return map_assuan_err (rc);
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init_membuf (&data, 1024);
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gk_parm.ctx = agent_ctx;
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gk_parm.sexp = keyparms;
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gk_parm.sexplen = gcry_sexp_canon_len (keyparms, 0, NULL, NULL);
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if (!gk_parm.sexplen)
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return gpg_error (GPG_ERR_INV_VALUE);
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rc = assuan_transact (agent_ctx, "GENKEY",
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membuf_data_cb, &data,
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inq_genkey_parms, &gk_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 map_assuan_err (rc);
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}
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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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if (!gcry_sexp_canon_len (buf, len, NULL, NULL))
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{
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xfree (buf);
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return gpg_error (GPG_ERR_INV_SEXP);
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}
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*r_pubkey = buf;
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return 0;
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}
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#endif /*0*/
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/* Ask the agent whether the corresponding secret key is available for
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the given keygrip. */
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int
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agent_havekey (const char *hexkeygrip)
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{
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int rc;
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char line[ASSUAN_LINELENGTH];
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rc = start_agent ();
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if (rc)
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return rc;
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if (!hexkeygrip || strlen (hexkeygrip) != 40)
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return gpg_error (GPG_ERR_INV_VALUE);
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snprintf (line, DIM(line)-1, "HAVEKEY %s", hexkeygrip);
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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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return map_assuan_err (rc);
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}
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/* Release the card info structure INFO. */
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void
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agent_release_card_info (struct agent_card_info_s *info)
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{
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if (!info)
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return;
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xfree (info->serialno); info->serialno = NULL;
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xfree (info->disp_name); info->disp_name = NULL;
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xfree (info->disp_lang); info->disp_lang = NULL;
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xfree (info->pubkey_url); info->pubkey_url = NULL;
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xfree (info->login_data); info->login_data = NULL;
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info->fpr1valid = info->fpr2valid = info->fpr3valid = 0;
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}
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static AssuanError
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learn_status_cb (void *opaque, const char *line)
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{
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struct agent_card_info_s *parm = opaque;
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const char *keyword = line;
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int keywordlen;
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int i;
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for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
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;
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while (spacep (line))
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line++;
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if (keywordlen == 8 && !memcmp (keyword, "SERIALNO", keywordlen))
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{
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xfree (parm->serialno);
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parm->serialno = store_serialno (line);
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}
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else if (keywordlen == 9 && !memcmp (keyword, "DISP-NAME", keywordlen))
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{
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xfree (parm->disp_name);
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parm->disp_name = unescape_status_string (line);
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}
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else if (keywordlen == 9 && !memcmp (keyword, "DISP-LANG", keywordlen))
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{
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xfree (parm->disp_lang);
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parm->disp_lang = unescape_status_string (line);
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}
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else if (keywordlen == 8 && !memcmp (keyword, "DISP-SEX", keywordlen))
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{
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parm->disp_sex = *line == '1'? 1 : *line == '2' ? 2: 0;
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}
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else if (keywordlen == 10 && !memcmp (keyword, "PUBKEY-URL", keywordlen))
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{
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xfree (parm->pubkey_url);
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parm->pubkey_url = unescape_status_string (line);
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}
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else if (keywordlen == 10 && !memcmp (keyword, "LOGIN-DATA", keywordlen))
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{
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xfree (parm->login_data);
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parm->login_data = unescape_status_string (line);
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}
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else if (keywordlen == 11 && !memcmp (keyword, "SIG-COUNTER", keywordlen))
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{
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parm->sig_counter = strtoul (line, NULL, 0);
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}
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else if (keywordlen == 10 && !memcmp (keyword, "CHV-STATUS", keywordlen))
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{
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char *p, *buf;
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buf = p = unescape_status_string (line);
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if (buf)
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{
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while (spacep (p))
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p++;
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parm->chv1_cached = atoi (p);
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while (*p && !spacep (p))
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p++;
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while (spacep (p))
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p++;
|
||
for (i=0; *p && i < 3; i++)
|
||
{
|
||
parm->chvmaxlen[i] = atoi (p);
|
||
while (*p && !spacep (p))
|
||
p++;
|
||
while (spacep (p))
|
||
p++;
|
||
}
|
||
for (i=0; *p && i < 3; i++)
|
||
{
|
||
parm->chvretry[i] = atoi (p);
|
||
while (*p && !spacep (p))
|
||
p++;
|
||
while (spacep (p))
|
||
p++;
|
||
}
|
||
xfree (buf);
|
||
}
|
||
}
|
||
else if (keywordlen == 7 && !memcmp (keyword, "KEY-FPR", keywordlen))
|
||
{
|
||
int no = atoi (line);
|
||
while (*line && !spacep (line))
|
||
line++;
|
||
while (spacep (line))
|
||
line++;
|
||
if (no == 1)
|
||
parm->fpr1valid = unhexify_fpr (line, parm->fpr1);
|
||
else if (no == 2)
|
||
parm->fpr2valid = unhexify_fpr (line, parm->fpr2);
|
||
else if (no == 3)
|
||
parm->fpr3valid = unhexify_fpr (line, parm->fpr3);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Call the agent to learn about a smartcard */
|
||
int
|
||
agent_learn (struct agent_card_info_s *info)
|
||
{
|
||
int rc;
|
||
|
||
rc = start_agent ();
|
||
if (rc)
|
||
return rc;
|
||
|
||
memset (info, 0, sizeof *info);
|
||
rc = assuan_transact (agent_ctx, "LEARN --send",
|
||
NULL, NULL, NULL, NULL,
|
||
learn_status_cb, info);
|
||
|
||
return map_assuan_err (rc);
|
||
}
|
||
|
||
/* Call the agent to retrieve a data object. This function returns
|
||
the data in the same structure as used by the learn command. It is
|
||
allowed to update such a structure using this commmand. */
|
||
int
|
||
agent_scd_getattr (const char *name, struct agent_card_info_s *info)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
if (!*name)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
/* We assume that NAME does not need escaping. */
|
||
if (12 + strlen (name) > DIM(line)-1)
|
||
return gpg_error (GPG_ERR_TOO_LARGE);
|
||
stpcpy (stpcpy (line, "SCD GETATTR "), name);
|
||
|
||
rc = start_agent ();
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL,
|
||
learn_status_cb, info);
|
||
|
||
return map_assuan_err (rc);
|
||
}
|
||
|
||
|
||
/* Send an setattr command to the SCdaemon. */
|
||
int
|
||
agent_scd_setattr (const char *name,
|
||
const unsigned char *value, size_t valuelen)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
char *p;
|
||
|
||
if (!*name || !valuelen)
|
||
return gpg_error (GPG_ERR_INV_VALUE);
|
||
|
||
/* We assume that NAME does not need escaping. */
|
||
if (12 + strlen (name) > DIM(line)-1)
|
||
return gpg_error (GPG_ERR_TOO_LARGE);
|
||
|
||
p = stpcpy (stpcpy (line, "SCD SETATTR "), name);
|
||
*p++ = ' ';
|
||
for (; valuelen; value++, valuelen--)
|
||
{
|
||
if (p >= line + DIM(line)-5 )
|
||
return gpg_error (GPG_ERR_TOO_LARGE);
|
||
if (*value < ' ' || *value == '+' || *value == '%')
|
||
{
|
||
sprintf (p, "%%%02X", *value);
|
||
p += 3;
|
||
}
|
||
else if (*value == ' ')
|
||
*p++ = '+';
|
||
else
|
||
*p++ = *value;
|
||
}
|
||
*p = 0;
|
||
|
||
rc = start_agent ();
|
||
if (rc)
|
||
return rc;
|
||
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
|
||
return map_assuan_err (rc);
|
||
}
|
||
|
||
|
||
/* Status callback for the SCD GENKEY command. */
|
||
static AssuanError
|
||
scd_genkey_cb (void *opaque, const char *line)
|
||
{
|
||
struct agent_card_genkey_s *parm = opaque;
|
||
const char *keyword = line;
|
||
int keywordlen;
|
||
gpg_error_t rc;
|
||
|
||
log_debug ("got status line `%s'\n", line);
|
||
for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
|
||
;
|
||
while (spacep (line))
|
||
line++;
|
||
|
||
if (keywordlen == 7 && !memcmp (keyword, "KEY-FPR", keywordlen))
|
||
{
|
||
parm->fprvalid = unhexify_fpr (line, parm->fpr);
|
||
}
|
||
if (keywordlen == 8 && !memcmp (keyword, "KEY-DATA", keywordlen))
|
||
{
|
||
gcry_mpi_t a;
|
||
const char *name = line;
|
||
|
||
while (*line && !spacep (line))
|
||
line++;
|
||
while (spacep (line))
|
||
line++;
|
||
|
||
rc = gcry_mpi_scan (&a, GCRYMPI_FMT_HEX, line, 0, NULL);
|
||
if (rc)
|
||
log_error ("error parsing received key data: %s\n", gpg_strerror (rc));
|
||
else if (*name == 'n' && spacep (name+1))
|
||
parm->n = a;
|
||
else if (*name == 'e' && spacep (name+1))
|
||
parm->e = a;
|
||
else
|
||
{
|
||
log_info ("unknown parameter name in received key data\n");
|
||
gcry_mpi_release (a);
|
||
}
|
||
}
|
||
else if (keywordlen == 14 && !memcmp (keyword,"KEY-CREATED-AT", keywordlen))
|
||
{
|
||
parm->created_at = (u32)strtoul (line, NULL, 10);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Send a GENKEY command to the SCdaemon. */
|
||
int
|
||
agent_scd_genkey (struct agent_card_genkey_s *info, int keyno, int force)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
rc = start_agent ();
|
||
if (rc)
|
||
return rc;
|
||
|
||
memset (info, 0, sizeof *info);
|
||
snprintf (line, DIM(line)-1, "SCD GENKEY %s%d",
|
||
force? "--force ":"", keyno);
|
||
line[DIM(line)-1] = 0;
|
||
|
||
memset (info, 0, sizeof *info);
|
||
rc = assuan_transact (agent_ctx, line,
|
||
NULL, NULL, NULL, NULL,
|
||
scd_genkey_cb, info);
|
||
|
||
return map_assuan_err (rc);
|
||
}
|
||
|
||
|
||
static AssuanError
|
||
membuf_data_cb (void *opaque, const void *buffer, size_t length)
|
||
{
|
||
membuf_t *data = opaque;
|
||
|
||
if (buffer)
|
||
put_membuf (data, buffer, length);
|
||
return 0;
|
||
}
|
||
|
||
/* Send a sign command to the scdaemon via gpg-agent's pass thru
|
||
mechanism. */
|
||
int
|
||
agent_scd_pksign (const char *serialno, int hashalgo,
|
||
const unsigned char *indata, size_t indatalen,
|
||
char **r_buf, size_t *r_buflen)
|
||
{
|
||
int rc, i;
|
||
char *p, line[ASSUAN_LINELENGTH];
|
||
membuf_t data;
|
||
size_t len;
|
||
|
||
/* Note, hashalgo is not yet used but hardwired to SHA1 in SCdaemon. */
|
||
|
||
*r_buf = NULL;
|
||
*r_buflen = 0;
|
||
|
||
rc = start_agent ();
|
||
if (rc)
|
||
return rc;
|
||
|
||
if (indatalen*2 + 50 > DIM(line))
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
|
||
sprintf (line, "SCD SETDATA ");
|
||
p = line + strlen (line);
|
||
for (i=0; i < indatalen ; i++, p += 2 )
|
||
sprintf (p, "%02X", indata[i]);
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return map_assuan_err (rc);
|
||
|
||
init_membuf (&data, 1024);
|
||
#if 0
|
||
if (!hashalgo) /* Temporary test hack. */
|
||
snprintf (line, DIM(line)-1, "SCD PKAUTH %s", serialno);
|
||
else
|
||
#endif
|
||
snprintf (line, DIM(line)-1, "SCD PKSIGN %s", serialno);
|
||
line[DIM(line)-1] = 0;
|
||
rc = assuan_transact (agent_ctx, line, membuf_data_cb, &data,
|
||
NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
{
|
||
xfree (get_membuf (&data, &len));
|
||
return map_assuan_err (rc);
|
||
}
|
||
*r_buf = get_membuf (&data, r_buflen);
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Decrypt INDATA of length INDATALEN using the card identified by
|
||
SERIALNO. Return the plaintext in a nwly allocated buffer stored
|
||
at the address of R_BUF.
|
||
|
||
Note, we currently support only RSA or more exactly algorithms
|
||
taking one input data element. */
|
||
int
|
||
agent_scd_pkdecrypt (const char *serialno,
|
||
const unsigned char *indata, size_t indatalen,
|
||
char **r_buf, size_t *r_buflen)
|
||
{
|
||
int rc, i;
|
||
char *p, line[ASSUAN_LINELENGTH];
|
||
membuf_t data;
|
||
size_t len;
|
||
|
||
*r_buf = NULL;
|
||
rc = start_agent ();
|
||
if (rc)
|
||
return rc;
|
||
|
||
/* FIXME: use secure memory where appropriate */
|
||
if (indatalen*2 + 50 > DIM(line))
|
||
return gpg_error (GPG_ERR_GENERAL);
|
||
|
||
sprintf (line, "SCD SETDATA ");
|
||
p = line + strlen (line);
|
||
for (i=0; i < indatalen ; i++, p += 2 )
|
||
sprintf (p, "%02X", indata[i]);
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
return map_assuan_err (rc);
|
||
|
||
init_membuf (&data, 1024);
|
||
snprintf (line, DIM(line)-1, "SCD PKDECRYPT %s", serialno);
|
||
line[DIM(line)-1] = 0;
|
||
rc = assuan_transact (agent_ctx, line,
|
||
membuf_data_cb, &data,
|
||
NULL, NULL, NULL, NULL);
|
||
if (rc)
|
||
{
|
||
xfree (get_membuf (&data, &len));
|
||
return map_assuan_err (rc);
|
||
}
|
||
*r_buf = get_membuf (&data, r_buflen);
|
||
if (!*r_buf)
|
||
return gpg_error (GPG_ERR_ENOMEM);
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Change the PIN of an OpenPGP card or reset the retry counter.
|
||
CHVNO 1: Change the PIN
|
||
2: Same as 1
|
||
3: Change the admin PIN
|
||
101: Set a new PIN and reset the retry counter
|
||
102: Same as 101
|
||
*/
|
||
int
|
||
agent_scd_change_pin (int chvno)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
const char *reset = "";
|
||
|
||
if (chvno >= 100)
|
||
reset = "--reset";
|
||
chvno %= 100;
|
||
|
||
rc = start_agent ();
|
||
if (rc)
|
||
return rc;
|
||
|
||
snprintf (line, DIM(line)-1, "SCD PASSWD %s %d", reset, chvno);
|
||
line[DIM(line)-1] = 0;
|
||
rc = assuan_transact (agent_ctx, line, NULL, NULL,
|
||
NULL, NULL, NULL, NULL);
|
||
return map_assuan_err (rc);
|
||
}
|
||
|
||
|
||
/* Perform a CHECKPIN operation. SERIALNO should be the seriial
|
||
number of the card - optioanlly followed by the fingerprint;
|
||
however the fingerprint is ignored here. */
|
||
int
|
||
agent_scd_checkpin (const char *serialno)
|
||
{
|
||
int rc;
|
||
char line[ASSUAN_LINELENGTH];
|
||
|
||
rc = start_agent ();
|
||
if (rc)
|
||
return rc;
|
||
|
||
snprintf (line, DIM(line)-1, "SCD CHECKPIN %s", serialno);
|
||
line[DIM(line)-1] = 0;
|
||
return assuan_transact (agent_ctx, line,
|
||
NULL, NULL,
|
||
NULL, NULL, NULL, NULL);
|
||
}
|
||
|
||
|