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/*
* Copyright (C) 1998-2000 Werner Koch <werner.koch@guug.de>
* Copyright (C) 1999-2000 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., 59 Temple Place - Suite 330,
* Boston, MA 02111, USA.
*/
/*
* NOTE
*
* This code used to be the parser for GnuPG's output.
*
* Nowadays, we are using an external pubring lister with PGP which mimics
* gpg's output format.
*
*/
#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 <ctype.h>
#include "mutt.h"
#include "pgp.h"
#include "charset.h"
/* for hexval */
#include "mime.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
*/
/* decode the backslash-escaped user ids. */
static char *_chs = 0;
static void fix_uid (char *uid)
{
char *s, *d;
iconv_t cd;
for (s = d = uid; *s;)
{
if (*s == '\\' && *(s+1) == 'x' && isxdigit ((unsigned char) *(s+2)) && isxdigit ((unsigned char) *(s+3)))
{
*d++ = hexval (*(s+2)) << 4 | hexval (*(s+3));
s += 4;
}
else
*d++ = *s++;
}
*d = '\0';
if (_chs && (cd = mutt_iconv_open (_chs, "utf-8", 0)) != (iconv_t)-1)
{
int n = s - uid + 1; /* chars available in original buffer */
char *buf;
ICONV_CONST char *ib;
char *ob;
size_t ibl, obl;
buf = safe_malloc (n+1);
ib = uid, ibl = d - uid + 1, ob = buf, obl = n;
iconv (cd, &ib, &ibl, &ob, &obl);
if (!ibl)
{
if (ob-buf < n)
{
memcpy (uid, buf, ob-buf);
uid[ob-buf] = '\0';
}
else if (ob-buf == n && (buf[n] = 0, strlen (buf) < n))
memcpy (uid, buf, n);
}
FREE (&buf);
iconv_close (cd);
}
}
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;
int flags = 0;
*is_subkey = 0;
if (!*buf)
return NULL;
dprint (2, (debugfile, "parse_pub_line: buf = `%s'\n", buf));
for (p = buf; p; p = pend)
{
if ((pend = strchr (p, ':')))
*pend++ = 0;
field++;
if (field > 1 && !*p)
continue;
switch (field)
{
case 1: /* record type */
{
dprint (2, (debugfile, "record type: %s\n", p));
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 || (*is_subkey && option (OPTPGPIGNORESUB))))
k = safe_calloc (sizeof (pgp_key_t), 1);
break;
}
case 2: /* trust info */
{
dprint (2, (debugfile, "trust info: %s\n", p));
switch (*p)
{ /* look only at the first letter */
case 'e':
flags |= KEYFLAG_EXPIRED;
break;
case 'r':
flags |= KEYFLAG_REVOKED;
break;
case 'd':
flags |= KEYFLAG_DISABLED;
break;
case 'n':
trust = 1;
break;
case 'm':
trust = 2;
break;
case 'f':
trust = 3;
break;
case 'u':
trust = 3;
break;
}
if (!is_uid && !(*is_subkey && option (OPTPGPIGNORESUB)))
k->flags |= flags;
break;
}
case 3: /* key length */
{
dprint (2, (debugfile, "key len: %s\n", p));
if (!(*is_subkey && option (OPTPGPIGNORESUB)))
k->keylen = atoi (p); /* fixme: add validation checks */
break;
}
case 4: /* pubkey algo */
{
dprint (2, (debugfile, "pubkey algorithm: %s\n", p));
if (!(*is_subkey && option (OPTPGPIGNORESUB)))
{
k->numalg = atoi (p);
k->algorithm = pgp_pkalgbytype (atoi (p));
}
k->flags |= pgp_get_abilities (atoi (p));
break;
}
case 5: /* 16 hex digits with the long keyid. */
{
dprint (2, (debugfile, "key id: %s\n", p));
if (!(*is_subkey && option (OPTPGPIGNORESUB)))
mutt_str_replace (&k->keyid, p);
break;
}
case 6: /* timestamp (1998-02-28) */
{
char tstr[11];
struct tm time;
dprint (2, (debugfile, "time stamp: %s\n", p));
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 */
/* ignore user IDs on subkeys */
if (!is_uid && (*is_subkey && option (OPTPGPIGNORESUB)))
break;
dprint (2, (debugfile, "user ID: %s\n", p));
uid = safe_calloc (sizeof (pgp_uid_t), 1);
fix_uid (p);
uid->addr = safe_strdup (p);
uid->trust = trust;
uid->flags |= flags;
uid
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