wicket.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Mailutils 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#include <sys/types.h>
#include <pwd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#include <mailutils/errno.h>
#include <mailutils/mutil.h>
#include <mailutils/mu_auth.h>
#include <auth0.h>
#include <url0.h>
struct myticket_data
{
char *user;
char *pass;
char *filename;
};
static int myticket_create __P ((ticket_t *, const char *, const char *, const char *));
static void myticket_destroy __P ((ticket_t));
static int myticket_pop __P ((ticket_t, url_t, const char *, char **));
static int get_pass __P ((url_t, const char *, const char *, char**));
static int get_user __P ((url_t, const char *, char **));
int
wicket_create (wicket_t *pwicket, const char *filename)
{
if (pwicket == NULL)
return EINVAL;
*pwicket = calloc (1, sizeof (**pwicket));
if (*pwicket == NULL)
return ENOMEM;
if (filename)
(*pwicket)->filename = strdup (filename);
return 0;
}
void
wicket_destroy (wicket_t *pwicket)
{
if (pwicket && *pwicket)
{
wicket_t wicket = *pwicket;
if (wicket->filename)
free (wicket->filename);
free (wicket);
*pwicket = NULL;
}
}
int
wicket_get_filename (wicket_t wicket, char *filename, size_t len,
size_t *pwriten)
{
size_t n;
if (wicket == NULL)
return EINVAL;
n = mu_cpystr (filename, wicket->filename, len);
if (pwriten)
*pwriten = n;
return 0;
}
int
wicket_set_filename (wicket_t wicket, const char *filename)
{
if (wicket == NULL)
return EINVAL;
if (wicket->filename)
free (wicket->filename);
wicket->filename = (filename) ? strdup (filename) : NULL;
return 0;
}
int
wicket_set_ticket (wicket_t wicket, int get_ticket
__P ((wicket_t, const char *, const char *, ticket_t *)))
{
if (wicket == NULL)
return EINVAL;
wicket->_get_ticket = get_ticket;
return 0;
}
int
wicket_get_ticket (wicket_t wicket, ticket_t *pticket, const char *user,
const char *type)
{
if (wicket == NULL || pticket == NULL)
return EINVAL;
if (wicket->filename == NULL)
return EINVAL;
if (wicket->_get_ticket)
return wicket->_get_ticket (wicket, user, type, pticket);
return myticket_create (pticket, user, NULL, wicket->filename);
}
static int
myticket_create (ticket_t *pticket, const char *user, const char *pass, const char *filename)
{
struct myticket_data *mdata;
int status = ticket_create (pticket, NULL);
if (status != 0)
return status;
mdata = calloc (1, sizeof *mdata);
if (mdata == NULL)
{
ticket_destroy (pticket, NULL);
return ENOMEM;
}
ticket_set_destroy (*pticket, myticket_destroy, NULL);
ticket_set_pop (*pticket, myticket_pop, NULL);
ticket_set_data (*pticket, mdata, NULL);
if (filename)
{
mdata->filename = strdup (filename);
if (mdata->filename == NULL)
{
ticket_destroy (pticket, NULL);
status = ENOMEM;
return status;
}
}
if (user)
{
mdata->user = strdup (user);
if (mdata->user == NULL)
{
ticket_destroy (pticket, NULL);
status = ENOMEM;
return status;
}
}
if (pass)
{
mdata->pass = strdup (pass);
if (mdata->pass == NULL)
{
ticket_destroy (pticket, NULL);
status = ENOMEM;
return status;
}
}
return 0;
}
static int
myticket_pop (ticket_t ticket, url_t url, const char *challenge, char **parg)
{
struct myticket_data *mdata = NULL;
int e = 0;
ticket_get_data (ticket, (void **)&mdata);
if (challenge &&
(
strstr (challenge, "ass") != NULL ||
strstr (challenge, "ASS") != NULL
)
)
{
if(mdata->pass)
{
*parg = strdup(mdata->pass);
if(!*parg)
e = ENOMEM;
}
else
{
e = get_pass (url, mdata->user, mdata->filename, parg);
}
}
else
{
if(mdata->user)
{
*parg = strdup(mdata->user);
if(!*parg)
e = ENOMEM;
}
else
{
e = get_user (url, mdata->filename, parg);
}
}
return e;
}
static void
myticket_destroy (ticket_t ticket)
{
struct myticket_data *mdata = NULL;
ticket_get_data (ticket, (void **)&mdata);
if (mdata)
{
if (mdata->user)
free (mdata->user);
if (mdata->pass)
free (mdata->pass);
if (mdata->filename)
free (mdata->filename);
free (mdata);
}
}
static int
get_ticket (url_t url, const char *user, const char *filename, url_t * ticket)
{
int err = 0;
FILE *fp = NULL;
size_t buflen = 128;
char *buf = NULL;
if (!filename || !url)
return EINVAL;
fp = fopen (filename, "r");
if (!fp)
return errno;
buf = malloc (buflen);
if (!buf)
{
fclose (fp);
return ENOMEM;
}
while (!feof (fp) && !ferror (fp))
{
char *ptr = buf;
int len = 0;
url_t u = NULL;
/* fgets:
1) return true, read some data
1a) read a newline, so break
1b) didn't read newline, so realloc & continue
2) returned NULL, so no more data
*/
while (fgets (ptr, buflen, fp) != NULL)
{
char *tmp = NULL;
len = strlen (buf);
/* Check if a complete line. */
if (len && buf[len - 1] == '\n')
break;
buflen *= 2;
tmp = realloc (buf, buflen);
if (tmp == NULL)
{
free (buf);
fclose (fp);
return ENOMEM;
}
buf = tmp;
ptr = buf + len;
}
len = strlen (buf);
/* Truncate a trailing newline. */
if (len && buf[len - 1] == '\n')
buf[len - 1] = 0;
/* Skip leading spaces. */
ptr = buf;
while (isspace (*ptr))
ptr++;
/* Skip comments. */
if (*ptr == '#')
continue;
/* Skip empty lines. */
if ((len = strlen (ptr)) == 0)
continue;
if ((err = url_create (&u, ptr)) != 0)
{
free (buf);
fclose (fp);
return err;
}
if ((err = url_parse (u)) != 0)
{
/* TODO: send output to the debug stream */
/*
printf ("url_parse %s failed: [%d] %s\n", str, err, mu_errstring (err));
*/
url_destroy (&u);
continue;
}
if (!url_is_ticket (u, url))
{
url_destroy (&u);
continue;
}
/* Also needs to be for name, if we required. */
if (user)
{
if (u->name && strcmp (u->name, "*") != 0
&& strcmp (user, u->name) != 0)
{
url_destroy (&u);
continue;
}
}
/* Looks like a match! */
*ticket = u;
u = NULL;
break;
}
fclose (fp);
free (buf);
return 0;
}
static int
get_user (url_t url, const char *filename, char **user)
{
char *u = 0;
if (url)
{
size_t n = 0;
url_get_user (url, NULL, 0, &n);
if (n)
{
u = calloc (1, n + 1);
url_get_user (url, u, n + 1, NULL);
}
}
if (!u && filename)
{
url_t ticket = 0;
int e = get_ticket (url, NULL, filename, &ticket);
if (e)
return e;
if (ticket)
{
size_t n = 0;
url_get_user (ticket, NULL, 0, &n);
if (n)
{
u = calloc (1, n + 1);
url_get_user (ticket, u, n + 1, NULL);
}
url_destroy (&ticket);
}
}
else
{
struct mu_auth_data *auth = mu_get_auth_by_uid (getuid ());
if (auth)
{
u = strdup (auth->name);
mu_auth_data_free (auth);
if (!u)
return ENOMEM;
}
}
*user = u;
return 0;
}
static int
get_pass (url_t url, const char *user, const char *filename, char **pass)
{
char *u = 0;
if (url)
{
size_t n = 0;
url_get_passwd (url, NULL, 0, &n);
if (n)
{
u = calloc (1, n + 1);
url_get_passwd (url, u, n + 1, NULL);
}
}
if (!u && filename)
{
url_t ticket = 0;
int e = get_ticket (url, user, filename, &ticket);
if (e)
return e;
if (ticket)
{
size_t n = 0;
url_get_passwd (ticket, NULL, 0, &n);
if (n)
{
u = calloc (1, n + 1);
url_get_passwd (ticket, u, n + 1, NULL);
}
url_destroy (&ticket);
}
}
*pass = u;
return 0;
}