mirror of git://git.gnupg.org/gnupg.git
164 lines
3.5 KiB
C
164 lines
3.5 KiB
C
/* divert-scd.c - divert operations to the scdaemon
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* Copyright (C) 2002 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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#include <config.h>
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#include <errno.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 <ctype.h>
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#include <assert.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "agent.h"
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#include "sexp-parse.h"
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static int
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ask_for_card (const unsigned char *shadow_info, char **r_kid)
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{
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int rc, i;
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const unsigned char *s;
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size_t n;
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char *serialno;
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int no_card = 0;
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char *desc;
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char *want_sn, *want_kid;
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*r_kid = NULL;
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s = shadow_info;
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if (*s != '(')
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return GNUPG_Invalid_Sexp;
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s++;
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n = snext (&s);
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if (!n)
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return GNUPG_Invalid_Sexp;
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want_sn = xtrymalloc (n+1);
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if (!want_sn)
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return GNUPG_Out_Of_Core;
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memcpy (want_sn, s, n);
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want_sn[n] = 0;
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s += n;
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n = snext (&s);
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if (!n)
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return GNUPG_Invalid_Sexp;
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want_kid = xtrymalloc (n+1);
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if (!want_kid)
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{
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xfree (want_sn);
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return GNUPG_Out_Of_Core;
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}
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memcpy (want_kid, s, n);
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want_kid[n] = 0;
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for (;;)
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{
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rc = agent_card_serialno (&serialno);
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if (!rc)
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{
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log_debug ("detected card with S/N %s\n", serialno);
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i = strcmp (serialno, want_sn);
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xfree (serialno);
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serialno = NULL;
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if (!i)
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{
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xfree (want_sn);
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*r_kid = want_kid;
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return 0; /* yes, we have the correct card */
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}
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}
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else if (rc == GNUPG_Card_Not_Present)
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{
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log_debug ("no card present\n");
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rc = 0;
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no_card = 1;
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}
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else
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{
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log_error ("error accesing card: %s\n", gnupg_strerror (rc));
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}
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if (!rc)
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{
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if (asprintf (&desc,
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"%s:%%0A%%0A"
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" \"%s\"",
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no_card? "Please insert the card with serial number"
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: "Please remove the current card and "
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"insert the one with serial number",
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want_sn) < 0)
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{
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rc = GNUPG_Out_Of_Core;
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}
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else
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{
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rc = agent_get_confirmation (desc, NULL);
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free (desc);
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}
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}
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if (rc)
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{
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xfree (want_sn);
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xfree (want_kid);
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return rc;
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}
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}
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}
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int
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divert_pksign (GCRY_SEXP *s_sig, GCRY_SEXP s_hash, const char *shadow_info)
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{
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int rc;
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char *kid;
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rc = ask_for_card (shadow_info, &kid);
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if (rc)
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return rc;
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xfree (kid);
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return GNUPG_Not_Implemented;
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}
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int
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divert_pkdecrypt (GCRY_SEXP *s_plain, GCRY_SEXP s_cipher,
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const char *shadow_info)
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{
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int rc;
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char *kid;
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rc = ask_for_card (shadow_info, &kid);
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if (rc)
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return rc;
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xfree (kid);
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return GNUPG_Not_Implemented;
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}
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