[thirdparty/glibc.git] / inet / ruserpass.c

/*
 * Copyright (c) 1985, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/stat.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libintl.h>

/* #include "ftp_var.h" */

static	int token (void);
static	FILE *cfile;

#define	DEFAULT	1
#define	LOGIN	2
#define	PASSWD	3
#define	ACCOUNT 4
#define MACDEF  5
#define	ID	10
#define	MACHINE	11

static char tokval[100];

static const char tokstr[] =
{
#define TOK_DEFAULT_IDX	0
  "default\0"
#define TOK_LOGIN_IDX	(TOK_DEFAULT_IDX + sizeof "default")
  "login\0"
#define TOK_PASSWORD_IDX (TOK_LOGIN_IDX + sizeof "login")
  "password\0"
#define TOK_PASSWD_IDX	(TOK_PASSWORD_IDX + sizeof "password")
  "passwd\0"
#define TOK_ACCOUNT_IDX	(TOK_PASSWD_IDX + sizeof "passwd")
  "account\0"
#define TOK_MACHINE_IDX	(TOK_ACCOUNT_IDX + sizeof "account")
  "machine\0"
#define TOK_MACDEF_IDX	(TOK_MACHINE_IDX + sizeof "machine")
  "macdef"
};

static const struct toktab {
	int tokstr_off;
	int tval;
} toktab[]= {
	{ TOK_DEFAULT_IDX,	DEFAULT },
	{ TOK_LOGIN_IDX,	LOGIN },
	{ TOK_PASSWORD_IDX,	PASSWD },
	{ TOK_PASSWD_IDX,	PASSWD },
	{ TOK_ACCOUNT_IDX,	ACCOUNT },
	{ TOK_MACHINE_IDX,	MACHINE },
	{ TOK_MACDEF_IDX,	MACDEF }
};


int
ruserpass (const char *host, const char **aname, const char **apass)
{
	char *hdir, *buf, *tmp;
	char myname[1024], *mydomain;
	int t, usedefault = 0;
	struct stat64 stb;

	hdir = __libc_secure_getenv("HOME");
	if (hdir == NULL) {
		/* If we can't get HOME, fail instead of trying ".",
		   which is no improvement. This really should call
		   getpwuid(getuid()).  */
		/*hdir = ".";*/
		return -1;
	}

	buf = alloca (strlen (hdir) + 8);

	__stpcpy (__stpcpy (buf, hdir), "/.netrc");
	cfile = fopen(buf, "rce");
	if (cfile == NULL) {
		if (errno != ENOENT)
			warn("%s", buf);
		return (0);
	}
	/* No threads use this stream.  */
	__fsetlocking (cfile, FSETLOCKING_BYCALLER);
	if (__gethostname(myname, sizeof(myname)) < 0)
		myname[0] = '\0';
	mydomain = __strchrnul(myname, '.');
next:
	while ((t = token())) switch(t) {

	case DEFAULT:
		usedefault = 1;
		/* FALL THROUGH */

	case MACHINE:
		if (!usedefault) {
			if (token() != ID)
				continue;
			/*
			 * Allow match either for user's input host name
			 * or official hostname.  Also allow match of
			 * incompletely-specified host in local domain.
			 */
			if (__strcasecmp(host, tokval) == 0)
				goto match;
/*			if (__strcasecmp(hostname, tokval) == 0)
				goto match;
			if ((tmp = strchr(hostname, '.')) != NULL &&
			    __strcasecmp(tmp, mydomain) == 0 &&
			    __strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
			    tokval[tmp - hostname] == '\0')
				goto match; */
			if ((tmp = strchr(host, '.')) != NULL &&
			    __strcasecmp(tmp, mydomain) == 0 &&
			    __strncasecmp(host, tokval, tmp - host) == 0 &&
			    tokval[tmp - host] == '\0')
				goto match;
			continue;
		}
	match:
		while ((t = token()) && t != MACHINE && t != DEFAULT) switch(t) {

		case LOGIN:
			if (token()) {
				if (*aname == 0) {
				  char *newp;
				  newp = malloc((unsigned) strlen(tokval) + 1);
				  if (newp == NULL)
				    {
				      warnx(_("out of memory"));
				      goto bad;
				    }
				  *aname = strcpy(newp, tokval);
				} else {
					if (strcmp(*aname, tokval))
						goto next;
				}
			}
			break;
		case PASSWD:
			if (strcmp(*aname, "anonymous") &&
			    fstat64(fileno(cfile), &stb) >= 0 &&
			    (stb.st_mode & 077) != 0) {
	warnx(_("Error: .netrc file is readable by others."));
	warnx(_("Remove 'password' line or make file unreadable by others."));
				goto bad;
			}
			if (token() && *apass == 0) {
				char *newp;
				newp = malloc((unsigned) strlen(tokval) + 1);
				if (newp == NULL)
				  {
				    warnx(_("out of memory"));
				    goto bad;
				  }
				*apass = strcpy(newp, tokval);
			}
			break;
		case ACCOUNT:
			break;
		case MACDEF:
			break;
		default:
			warnx(_("Unknown .netrc keyword %s"), tokval);
			break;
		}
		goto done;
	}
done:
	(void) fclose(cfile);
	return (0);
bad:
	(void) fclose(cfile);
	return (-1);
}
libc_hidden_def (ruserpass)

static int
token (void)
{
	char *cp;
	int c;
	int i;

	if (feof_unlocked(cfile) || ferror_unlocked(cfile))
		return (0);
	while ((c = getc_unlocked(cfile)) != EOF &&
	    (c == '\n' || c == '\t' || c == ' ' || c == ','))
		continue;
	if (c == EOF)
		return (0);
	cp = tokval;
	if (c == '"') {
		while ((c = getc_unlocked(cfile)) != EOF && c != '"') {
			if (c == '\\')
				c = getc_unlocked(cfile);
			*cp++ = c;
		}
	} else {
		*cp++ = c;
		while ((c = getc_unlocked(cfile)) != EOF
		    && c != '\n' && c != '\t' && c != ' ' && c != ',') {
			if (c == '\\')
				c = getc_unlocked(cfile);
			*cp++ = c;
		}
	}
	*cp = 0;
	if (tokval[0] == 0)
		return (0);
	for (i = 0; i < (int) (sizeof (toktab) / sizeof (toktab[0])); ++i)
		if (!strcmp(&tokstr[toktab[i].tokstr_off], tokval))
			return toktab[i].tval;
	return (ID);
}
Commit	Line	Data
49633efb RM	1	/*
	2	* Copyright (c) 1985, 1993, 1994
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
49633efb RM	13	* 4. Neither the name of the University nor the names of its contributors
	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*/
	29
49633efb RM	30	#include <sys/types.h>
	31	#include <sys/stat.h>
	32
	33	#include <ctype.h>
2de99474	34	#include <err.h>
49633efb	35	#include <errno.h>
3846463e	36	#include <netdb.h>
49633efb	37	#include <stdio.h>
2706ee38	38	#include <stdio_ext.h>
49633efb RM	39	#include <stdlib.h>
	40	#include <string.h>
	41	#include <unistd.h>
4360eafd	42	#include <libintl.h>
49633efb RM	43
	44	/* #include "ftp_var.h" */
	45
3846463e	46	static int token (void);
49633efb RM	47	static FILE *cfile;
	48
	49	#define DEFAULT 1
	50	#define LOGIN 2
	51	#define PASSWD 3
	52	#define ACCOUNT 4
	53	#define MACDEF 5
	54	#define ID 10
	55	#define MACHINE 11
	56
	57	static char tokval[100];
	58
390500b1 UD	59	static const char tokstr[] =
	60	{
	61	#define TOK_DEFAULT_IDX 0
	62	"default\0"
	63	#define TOK_LOGIN_IDX (TOK_DEFAULT_IDX + sizeof "default")
	64	"login\0"
	65	#define TOK_PASSWORD_IDX (TOK_LOGIN_IDX + sizeof "login")
	66	"password\0"
	67	#define TOK_PASSWD_IDX (TOK_PASSWORD_IDX + sizeof "password")
	68	"passwd\0"
	69	#define TOK_ACCOUNT_IDX (TOK_PASSWD_IDX + sizeof "passwd")
	70	"account\0"
	71	#define TOK_MACHINE_IDX (TOK_ACCOUNT_IDX + sizeof "account")
	72	"machine\0"
	73	#define TOK_MACDEF_IDX (TOK_MACHINE_IDX + sizeof "machine")
	74	"macdef"
	75	};
	76
	77	static const struct toktab {
	78	int tokstr_off;
49633efb RM	79	int tval;
49633efb RM	80	} toktab[]= {
390500b1 UD	81	{ TOK_DEFAULT_IDX, DEFAULT },
	82	{ TOK_LOGIN_IDX, LOGIN },
	83	{ TOK_PASSWORD_IDX, PASSWD },
	84	{ TOK_PASSWD_IDX, PASSWD },
	85	{ TOK_ACCOUNT_IDX, ACCOUNT },
	86	{ TOK_MACHINE_IDX, MACHINE },
	87	{ TOK_MACDEF_IDX, MACDEF }
49633efb RM	88	};
	89
	90
	91
	92	int
41075ae3	93	ruserpass (const char host, const char aname, const char *apass)
49633efb	94	{
2de99474	95	char hdir, buf, *tmp;
49633efb	96	char myname[1024], *mydomain;
3846463e	97	int t, usedefault = 0;
8edf6e0d	98	struct stat64 stb;
49633efb	99
84b3fd84	100	hdir = __libc_secure_getenv("HOME");
d68171ed UD	101	if (hdir == NULL) {
	102	/* If we can't get HOME, fail instead of trying ".",
	103	which is no improvement. This really should call
	104	getpwuid(getuid()). */
	105	/hdir = ".";/
350635a5	106	return -1;
d68171ed	107	}
2de99474 UD	108
	109	buf = alloca (strlen (hdir) + 8);
	110
86187531	111	__stpcpy (__stpcpy (buf, hdir), "/.netrc");
312be3f9	112	cfile = fopen(buf, "rce");
49633efb	113	if (cfile == NULL) {
2de99474 UD	114	if (errno != ENOENT)
2de99474 UD	115	warn("%s", buf);
49633efb RM	116	return (0);
49633efb RM	117	}
2706ee38 UD	118	/* No threads use this stream. */
2706ee38 UD	119	__fsetlocking (cfile, FSETLOCKING_BYCALLER);
50304ef0	120	if (__gethostname(myname, sizeof(myname)) < 0)
49633efb	121	myname[0] = '\0';
390500b1	122	mydomain = __strchrnul(myname, '.');
49633efb RM	123	next:
	124	while ((t = token())) switch(t) {
	125
	126	case DEFAULT:
	127	usedefault = 1;
	128	/* FALL THROUGH */
	129
	130	case MACHINE:
	131	if (!usedefault) {
	132	if (token() != ID)
	133	continue;
	134	/*
	135	* Allow match either for user's input host name
2de99474	136	* or official hostname. Also allow match of
49633efb RM	137	* incompletely-specified host in local domain.
49633efb RM	138	*/
50304ef0	139	if (__strcasecmp(host, tokval) == 0)
49633efb	140	goto match;
50304ef0	141	/* if (__strcasecmp(hostname, tokval) == 0)
2de99474	142	goto match;
49633efb	143	if ((tmp = strchr(hostname, '.')) != NULL &&
50304ef0 UD	144	__strcasecmp(tmp, mydomain) == 0 &&
50304ef0 UD	145	__strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
49633efb RM	146	tokval[tmp - hostname] == '\0')
	147	goto match; */
	148	if ((tmp = strchr(host, '.')) != NULL &&
50304ef0 UD	149	__strcasecmp(tmp, mydomain) == 0 &&
50304ef0 UD	150	__strncasecmp(host, tokval, tmp - host) == 0 &&
49633efb RM	151	tokval[tmp - host] == '\0')
	152	goto match;
	153	continue;
	154	}
	155	match:
	156	while ((t = token()) && t != MACHINE && t != DEFAULT) switch(t) {
	157
	158	case LOGIN:
3846463e	159	if (token()) {
2de99474	160	if (*aname == 0) {
3846463e UD	161	char *newp;
	162	newp = malloc((unsigned) strlen(tokval) + 1);
	163	if (newp == NULL)
	164	{
	165	warnx(_("out of memory"));
	166	goto bad;
	167	}
	168	*aname = strcpy(newp, tokval);
49633efb RM	169	} else {
	170	if (strcmp(*aname, tokval))
	171	goto next;
	172	}
3846463e	173	}
49633efb RM	174	break;
	175	case PASSWD:
	176	if (strcmp(*aname, "anonymous") &&
8edf6e0d	177	fstat64(fileno(cfile), &stb) >= 0 &&
49633efb	178	(stb.st_mode & 077) != 0) {
2de99474	179	warnx(_("Error: .netrc file is readable by others."));
841785ba	180	warnx(_("Remove 'password' line or make file unreadable by others."));
49633efb RM	181	goto bad;
	182	}
	183	if (token() && *apass == 0) {
3846463e UD	184	char *newp;
	185	newp = malloc((unsigned) strlen(tokval) + 1);
	186	if (newp == NULL)
	187	{
	188	warnx(_("out of memory"));
	189	goto bad;
	190	}
	191	*apass = strcpy(newp, tokval);
49633efb RM	192	}
	193	break;
	194	case ACCOUNT:
49633efb RM	195	break;
49633efb RM	196	case MACDEF:
49633efb RM	197	break;
49633efb RM	198	default:
2de99474	199	warnx(_("Unknown .netrc keyword %s"), tokval);
49633efb RM	200	break;
	201	}
	202	goto done;
	203	}
	204	done:
	205	(void) fclose(cfile);
	206	return (0);
	207	bad:
	208	(void) fclose(cfile);
	209	return (-1);
	210	}
e2ec9b4d	211	libc_hidden_def (ruserpass)
49633efb RM	212
49633efb RM	213	static int
60d2f8f3	214	token (void)
49633efb RM	215	{
	216	char *cp;
	217	int c;
390500b1	218	int i;
49633efb	219
77ccaba1	220	if (feof_unlocked(cfile) \|\| ferror_unlocked(cfile))
49633efb	221	return (0);
eb27c43f	222	while ((c = getc_unlocked(cfile)) != EOF &&
49633efb RM	223	(c == '\n' \|\| c == '\t' \|\| c == ' ' \|\| c == ','))
	224	continue;
	225	if (c == EOF)
	226	return (0);
	227	cp = tokval;
	228	if (c == '"') {
eb27c43f	229	while ((c = getc_unlocked(cfile)) != EOF && c != '"') {
49633efb	230	if (c == '\\')
eb27c43f	231	c = getc_unlocked(cfile);
49633efb RM	232	*cp++ = c;
	233	}
	234	} else {
	235	*cp++ = c;
eb27c43f	236	while ((c = getc_unlocked(cfile)) != EOF
49633efb RM	237	&& c != '\n' && c != '\t' && c != ' ' && c != ',') {
49633efb RM	238	if (c == '\\')
eb27c43f	239	c = getc_unlocked(cfile);
49633efb RM	240	*cp++ = c;
	241	}
	242	}
	243	*cp = 0;
	244	if (tokval[0] == 0)
	245	return (0);
c3301189	246	for (i = 0; i < (int) (sizeof (toktab) / sizeof (toktab[0])); ++i)
390500b1 UD	247	if (!strcmp(&tokstr[toktab[i].tokstr_off], tokval))
390500b1 UD	248	return toktab[i].tval;
49633efb RM	249	return (ID);
49633efb RM	250	}