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/*
* Copyright (C) 1998 Werner Koch <werner.koch@guug.de>
* Copyright (C) 1999 Thomas Roessler <roessler@guug.de>
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
* 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include "mutt.h"
#include "pgp.h"
/****************
* Read the GNUPG keys. For now we read the complete keyring by
* calling gnupg in a special mode.
*
* The output format of gpgm is colon delimited with these fields:
* - record type ("pub","uid","sig","rev" etc.)
* - trust info
* - key length
* - pubkey algo
* - 16 hex digits with the long keyid.
* - timestamp (1998-02-28)
* - Local id
* - ownertrust
* - name
* - signature class
*/
static pgp_key_t *parse_pub_line (char *buf, int *is_subkey, pgp_key_t *k)
{
pgp_uid_t *uid = NULL;
int field = 0, is_uid = 0;
char *pend, *p;
int trust = 0;
*is_subkey = 0;
if (!*buf)
return NULL;
for (p = buf; p; p = pend)
{
if ((pend = strchr (p, ':')))
*pend++ = 0;
field++;
if (field > 1 && !*p)
continue;
switch (field)
{
case 1: /* record type */
{
if (!mutt_strcmp (p, "pub"))
;
else if (!mutt_strcmp (p, "sub"))
*is_subkey = 1;
else if (!mutt_strcmp (p, "sec"))
;
else if (!mutt_strcmp (p, "ssb"))
*is_subkey = 1;
else if (!mutt_strcmp (p, "uid"))
is_uid = 1;
else
return NULL;
if (!is_uid)
k = safe_calloc (sizeof (pgp_key_t), 1);
break;
}
case 2: /* trust info */
{
switch (*p)
{ /* look only at the first letter */
case 'e':
k->flags |= KEYFLAG_EXPIRED;
break;
case 'r':
k->flags |= KEYFLAG_REVOKED;
break;
/* produce "undefined trust" as long as gnupg doesn't
* have a proper trust model.
*/
#if 0
case 'n':
trust = 1;
break;
case 'm':
trust = 2;
break;
case 'f':
trust = 3;
break;
case 'u':
trust = 3;
break;
#endif
}
break;
}
case 3: /* key length */
{
k->keylen = atoi (p); /* fixme: add validation checks */
break;
}
case 4: /* pubkey algo */
{
k->algorithm = pgp_pkalgbytype (atoi (p));
k->flags |= pgp_get_abilities (atoi (p));
break;
}
case 5: /* 16 hex digits with the long keyid. */
{
/* We really should do a check here */
k->keyid = safe_strdup (p);
break;
}
case 6: /* timestamp (1998-02-28) */
{
char tstr[11];
struct tm time;
if (!p)
break;
time.tm_sec = 0;
time.tm_min = 0;
time.tm_hour = 12;
strncpy (tstr, p, 11);
tstr[4] = '\0';
time.tm_year = atoi (tstr)-1900;
tstr[7] = '\0';
time.tm_mon = (atoi (tstr+5))-1;
time.tm_mday = atoi (tstr+8);
k->gen_time = mutt_mktime (&time, 0);
break;
}
case 7: /* valid for n days */
break;
case 8: /* Local id */
break;
case 9: /* ownertrust */
break;
case 10: /* name */
{
if (!pend || !*p)
break; /* empty field or no trailing colon */
uid = safe_calloc (sizeof (pgp_uid_t), 1);
uid->addr = safe_strdup (p);
uid->trust = trust;
uid->parent = k;
uid->next = k->address;
k->address = uid;
if (strstr (p, "ENCR"))
k->flags |= KEYFLAG_PREFER_ENCRYPTION;
if (strstr (p, "SIGN"))
k->flags |= KEYFLAG_PREFER_SIGNING;
break;
}
case 11: /* signature class */
break;
default:
break;
}
}
return k;
}
static pid_t gpg_invoke_list_keys (struct pgp_vinfo *pgp,
FILE ** pgpin, FILE ** pgpout, FILE ** pgperr,
int pgpinfd, int pgpoutfd, int pgperrfd,
pgp_ring_t keyring,
LIST * hints)
{
char cmd[HUGE_STRING];
char tmpcmd[HUGE_STRING];
/* we use gpgm here */
snprintf (cmd, sizeof (cmd),
"%sm --no-verbose --batch --with-colons --list-%skeys ",
NONULL (*pgp->binary), keyring == PGP_SECRING ? "secret-" : "");
for (; hints; hints = hints->next)
{
snprintf (tmpcmd, sizeof (tmpcmd), "%s %s", cmd, (char *) hints->data);
strcpy (cmd, tmpcmd);
}
return mutt_create_filter_fd (cmd, pgpin, pgpout, pgperr,
pgpinfd, pgpoutfd, pgperrfd);
}
pgp_key_t *gpg_get_candidates (struct pgp_vinfo * pgp, pgp_ring_t keyring,
LIST * hints)
{
FILE *fp;
pid_t thepid;
char buf[LONG_STRING];
pgp_key_t *db = NULL, **kend, *k = NULL, *kk, *mainkey = NULL;
int is_sub;
int devnull;
if ((devnull = open ("/dev/null", O_RDWR)) == -1)
return NULL;
thepid = gpg_invoke_list_keys (pgp, NULL, &fp, NULL, -1, -1, devnull,
keyring, hints);
if (thepid == -1)
{
close (devnull);
return NULL;
}
kend = &db;
k = NULL;
while (fgets (buf, sizeof (buf) - 1, fp))
{
if (!(kk = parse_pub_line (buf, &is_sub, k)))
continue;
/* Only append kk to the list if it's new. */
if (kk != k)
{
if (k)
kend = &k->next;
*kend = k = kk;
if (is_sub)
{
pgp_uid_t **l;
k->flags |= KEYFLAG_SUBKEY;
k->parent = mainkey;
for (l = &k->address; *l; l = &(*l)->next)
;
*l = pgp_copy_uids (mainkey->address, k);
}
else
mainkey = k;
}
}
if (ferror (fp))
mutt_perror ("fgets");
fclose (fp);
mutt_wait_filter (thepid);
close (devnull);
return db;
}
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