/* This file is part of GNU Pies
Copyright (C) 2015 Sergey Poznyakoff
GNU Pies 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 3, or (at your option)
any later version.
GNU Pies 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 GNU Pies. If not, see . */
#ifdef HAVE_CONFIG_H
# include
#endif
#include "libpies.h"
#include
#include
#include
#include
#include
#include
/* Compare two hostnames. Return 0 if they have the same address type,
address length *and* at least one of the addresses of A matches
B */
static int
hostcmp (const char *a, const char *b)
{
struct hostent *hp = gethostbyname (a);
char **addrlist;
char *dptr;
char **addr;
size_t i, count;
size_t entry_length;
int entry_type;
if (!hp)
return 1;
for (count = 1, addr = hp->h_addr_list; *addr; addr++)
count++;
addrlist = grecs_malloc (count * (sizeof *addrlist + hp->h_length)
- hp->h_length);
dptr = (char *) (addrlist + count);
for (i = 0; i < count - 1; i++)
{
memcpy (dptr, hp->h_addr_list[i], hp->h_length);
addrlist[i] = dptr;
dptr += hp->h_length;
}
addrlist[i] = NULL;
entry_length = hp->h_length;
entry_type = hp->h_addrtype;
hp = gethostbyname (b);
if (!hp || entry_length != hp->h_length || entry_type != hp->h_addrtype)
{
grecs_free (addrlist);
return 1;
}
for (addr = addrlist; *addr; addr++)
{
char **p;
for (p = hp->h_addr_list; *p; p++)
{
if (memcmp (*addr, *p, entry_length) == 0)
{
grecs_free (addrlist);
return 0;
}
}
}
grecs_free (addrlist);
return 1;
}
static int
match_url (size_t argc, char **argv, struct pies_url *url)
{
if (hostcmp (argv[1], url->host ? url->host : "localhost") == 0)
{
if (argc >= 4 && strcmp (argv[2], "port") == 0)
{
unsigned long n = strtoul (argv[3], NULL, 10);
if (n == url->port)
return 1;
}
else
return 1;
}
return 0;
}
static void
parse_args (struct grecs_locus *loc, char **argv,
char **username, char **password)
{
if (*username)
{
grecs_free (*username);
*username = NULL;
}
if (*password)
{
grecs_free (*password);
*password = NULL;
}
while (*argv)
{
if (!argv[1])
{
grecs_error (loc, 0, _("incomplete sentence"));
break;
}
if (strcmp (*argv, "login") == 0)
*username = grecs_strdup (argv[1]);
else if (strcmp (*argv, "password") == 0)
*password = grecs_strdup (argv[1]);
argv += 2;
}
}
/* Parse traditional .netrc file. Set up auth_args fields in accordance with
it. */
void
netrc_scan_file (FILE *fp, struct grecs_locus *loc, struct pies_url *url)
{
char *buf = NULL;
size_t n = 0;
struct wordsplit ws;
int wsflags = WRDSF_NOVAR | WRDSF_NOCMD | WRDSF_QUOTE | WRDSF_SQUEEZE_DELIMS;
char *username = NULL;
char *password = NULL;
while (grecs_getline (&buf, &n, fp) > 0)
{
loc->beg.line++;
if (wordsplit (buf, &ws, wsflags))
{
grecs_error (loc, 0, "wordsplit: %s", wordsplit_strerror (&ws));
continue;
}
wsflags |= WRDSF_REUSE;
if (ws.ws_wordc == 0)
continue;
if (strcmp (ws.ws_wordv[0], "machine") == 0)
{
if (match_url (ws.ws_wordc, ws.ws_wordv, url))
{
parse_args (loc, ws.ws_wordv + 2, &username, &password);
break;
}
}
else if (strcmp (ws.ws_wordv[0], "default") == 0)
parse_args (loc, ws.ws_wordv + 1, &username, &password);
else
grecs_error (loc, 0, _("ignoring unrecognized line\n"));
}
grecs_free (buf);
if (wsflags & WRDSF_REUSE)
wordsplit_free (&ws);
url->user = username;
url->passwd = password;
}
void
netrc_scan (struct pies_url *url)
{
FILE *fp;
struct grecs_locus loc;
char *filename;
char *homedir;
if (url->user)
return;
homedir = getenv ("HOME");
if (!homedir)
{
struct passwd *pwd = getpwuid (getuid ());
if (!pwd)
return;
homedir = pwd->pw_dir;
}
filename = mkfilename (homedir, ".netrc", NULL);
fp = fopen (filename, "r");
if (!fp)
{
if (errno != ENOENT)
grecs_error (NULL, 0,
_("cannot open configuration file %s: %s"),
filename, strerror (errno));
free (filename);
return;
}
loc.beg.file = loc.end.file = (char*) filename;
loc.beg.col = loc.end.col = 0;
loc.beg.line = 0;
netrc_scan_file (fp, &loc, url);
fclose (fp);
free (filename);
}