usr/src/usr.bin/ftp/ruserpass.c

/*
 * Copyright (c) 1985 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)ruserpass.c	5.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <stdio.h>
#include <utmp.h>
#include <ctype.h>
#include <sys/stat.h>
#include <errno.h>
#include "ftp_var.h"

char	*renvlook(), *malloc(), *index(), *getenv(), *getpass(), *getlogin();
char	*strcpy();
struct	utmp *getutmp();
static	FILE *cfile;

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

static char tokval[100];

static struct toktab {
	char *tokstr;
	int tval;
} toktab[]= {
	"default",	DEFAULT,
	"login",	LOGIN,
	"password",	PASSWD,
	"passwd",	PASSWD,
	"account",	ACCOUNT,
	"machine",	MACH,
	"macdef",	MACDEF,
	0,		0
};

ruserpass(host, aname, apass, aacct)
	char *host, **aname, **apass, **aacct;
{
	char *hdir, buf[BUFSIZ], *tmp;
	char myname[MAXHOSTNAMELEN], *mydomain;
	int t, i, c, usedefault = 0;
	struct stat stb;
	extern int errno;

	hdir = getenv("HOME");
	if (hdir == NULL)
		hdir = ".";
	(void) sprintf(buf, "%s/.netrc", hdir);
	cfile = fopen(buf, "r");
	if (cfile == NULL) {
		if (errno != ENOENT)
			perror(buf);
		return(0);
	}
	if (gethostname(myname, sizeof(myname)) < 0)
		myname[0] = '\0';
	if ((mydomain = index(myname, '.')) == NULL)
		mydomain = "";
next:
	while ((t = token())) switch(t) {

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

	case MACH:
		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 = index(hostname, '.')) != NULL &&
			    strcasecmp(tmp, mydomain) == 0 &&
			    strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
			    tokval[tmp - hostname] == '\0')
				goto match;
			if ((tmp = index(host, '.')) != NULL &&
			    strcasecmp(tmp, mydomain) == 0 &&
			    strncasecmp(host, tokval, tmp - host) == 0 &&
			    tokval[tmp - host] == '\0')
				goto match;
			continue;
		}
	match:
		while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {

		case LOGIN:
			if (token())
				if (*aname == 0) {
					*aname = malloc((unsigned) strlen(tokval) + 1);
					(void) strcpy(*aname, tokval);
				} else {
					if (strcmp(*aname, tokval))
						goto next;
				}
			break;
		case PASSWD:
			if (strcmp(*aname, "anonymous") &&
			    fstat(fileno(cfile), &stb) >= 0 &&
			    (stb.st_mode & 077) != 0) {
	fprintf(stderr, "Error - .netrc file not correct mode.\n");
	fprintf(stderr, "Remove password or correct mode.\n");
				goto bad;
			}
			if (token() && *apass == 0) {
				*apass = malloc((unsigned) strlen(tokval) + 1);
				(void) strcpy(*apass, tokval);
			}
			break;
		case ACCOUNT:
			if (fstat(fileno(cfile), &stb) >= 0
			    && (stb.st_mode & 077) != 0) {
	fprintf(stderr, "Error - .netrc file not correct mode.\n");
	fprintf(stderr, "Remove account or correct mode.\n");
				goto bad;
			}
			if (token() && *aacct == 0) {
				*aacct = malloc((unsigned) strlen(tokval) + 1);
				(void) strcpy(*aacct, tokval);
			}
			break;
		case MACDEF:
			if (proxy) {
				(void) fclose(cfile);
				return(0);
			}
			while ((c=getc(cfile)) != EOF && c == ' ' || c == '\t');
			if (c == EOF || c == '\n') {
				printf("Missing macdef name argument.\n");
				goto bad;
			}
			if (macnum == 16) {
				printf("Limit of 16 macros have already been defined\n");
				goto bad;
			}
			tmp = macros[macnum].mac_name;
			*tmp++ = c;
			for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
			    !isspace(c); ++i) {
				*tmp++ = c;
			}
			if (c == EOF) {
				printf("Macro definition missing null line terminator.\n");
				goto bad;
			}
			*tmp = '\0';
			if (c != '\n') {
				while ((c=getc(cfile)) != EOF && c != '\n');
			}
			if (c == EOF) {
				printf("Macro definition missing null line terminator.\n");
				goto bad;
			}
			if (macnum == 0) {
				macros[macnum].mac_start = macbuf;
			}
			else {
				macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
			}
			tmp = macros[macnum].mac_start;
			while (tmp != macbuf + 4096) {
				if ((c=getc(cfile)) == EOF) {
				printf("Macro definition missing null line terminator.\n");
					goto bad;
				}
				*tmp = c;
				if (*tmp == '\n') {
					if (*(tmp-1) == '\0') {
					   macros[macnum++].mac_end = tmp - 1;
					   break;
					}
					*tmp = '\0';
				}
				tmp++;
			}
			if (tmp == macbuf + 4096) {
				printf("4K macro buffer exceeded\n");
				goto bad;
			}
			break;
		default:
	fprintf(stderr, "Unknown .netrc keyword %s\n", tokval);
			break;
		}
		goto done;
	}
done:
	(void) fclose(cfile);
	return(0);
bad:
	(void) fclose(cfile);
	return(-1);
}

static
token()
{
	char *cp;
	int c;
	struct toktab *t;

	if (feof(cfile))
		return (0);
	while ((c = getc(cfile)) != EOF &&
	    (c == '\n' || c == '\t' || c == ' ' || c == ','))
		continue;
	if (c == EOF)
		return (0);
	cp = tokval;
	if (c == '"') {
		while ((c = getc(cfile)) != EOF && c != '"') {
			if (c == '\\')
				c = getc(cfile);
			*cp++ = c;
		}
	} else {
		*cp++ = c;
		while ((c = getc(cfile)) != EOF
		    && c != '\n' && c != '\t' && c != ' ' && c != ',') {
			if (c == '\\')
				c = getc(cfile);
			*cp++ = c;
		}
	}
	*cp = 0;
	if (tokval[0] == 0)
		return (0);
	for (t = toktab; t->tokstr; t++)
		if (!strcmp(t->tokstr, tokval))
			return (t->tval);
	return (ID);
}
Commit	Line	Data
	1	/*
	2	* Copyright (c) 1985 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	16	*/
	17
	18	#ifndef lint
	19	static char sccsid[] = "@(#)ruserpass.c 5.1 (Berkeley) %G%";
	20	#endif /* not lint */
	21
	22	#include <sys/types.h>
	23	#include <stdio.h>
	24	#include <utmp.h>
	25	#include <ctype.h>
	26	#include <sys/stat.h>
	27	#include <errno.h>
	28	#include "ftp_var.h"
	29
	30	char renvlook(), malloc(), index(), getenv(), getpass(), getlogin();
	31	char *strcpy();
	32	struct utmp *getutmp();
	33	static FILE *cfile;
	34
	35	#define DEFAULT 1
	36	#define LOGIN 2
	37	#define PASSWD 3
	38	#define ACCOUNT 4
	39	#define MACDEF 5
	40	#define ID 10
	41	#define MACH 11
	42
	43	static char tokval[100];
	44
	45	static struct toktab {
	46	char *tokstr;
	47	int tval;
	48	} toktab[]= {
	49	"default", DEFAULT,
	50	"login", LOGIN,
	51	"password", PASSWD,
	52	"passwd", PASSWD,
	53	"account", ACCOUNT,
	54	"machine", MACH,
	55	"macdef", MACDEF,
	56	0, 0
	57	};
	58
	59	ruserpass(host, aname, apass, aacct)
	60	char host, aname, apass, *aacct;
	61	{
	62	char hdir, buf[BUFSIZ], tmp;
	63	char myname[MAXHOSTNAMELEN], *mydomain;
	64	int t, i, c, usedefault = 0;
	65	struct stat stb;
	66	extern int errno;
	67
	68	hdir = getenv("HOME");
	69	if (hdir == NULL)
	70	hdir = ".";
	71	(void) sprintf(buf, "%s/.netrc", hdir);
	72	cfile = fopen(buf, "r");
	73	if (cfile == NULL) {
	74	if (errno != ENOENT)
	75	perror(buf);
	76	return(0);
	77	}
	78	if (gethostname(myname, sizeof(myname)) < 0)
	79	myname[0] = '\0';
	80	if ((mydomain = index(myname, '.')) == NULL)
	81	mydomain = "";
	82	next:
	83	while ((t = token())) switch(t) {
	84
	85	case DEFAULT:
	86	usedefault = 1;
	87	/* FALL THROUGH */
	88
	89	case MACH:
	90	if (!usedefault) {
	91	if (token() != ID)
	92	continue;
	93	/*
	94	* Allow match either for user's input host name
	95	* or official hostname. Also allow match of
	96	* incompletely-specified host in local domain.
	97	*/
	98	if (strcasecmp(host, tokval) == 0)
	99	goto match;
	100	if (strcasecmp(hostname, tokval) == 0)
	101	goto match;
	102	if ((tmp = index(hostname, '.')) != NULL &&
	103	strcasecmp(tmp, mydomain) == 0 &&
	104	strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
	105	tokval[tmp - hostname] == '\0')
	106	goto match;
	107	if ((tmp = index(host, '.')) != NULL &&
	108	strcasecmp(tmp, mydomain) == 0 &&
	109	strncasecmp(host, tokval, tmp - host) == 0 &&
	110	tokval[tmp - host] == '\0')
	111	goto match;
	112	continue;
	113	}
	114	match:
	115	while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
	116
	117	case LOGIN:
	118	if (token())
	119	if (*aname == 0) {
	120	*aname = malloc((unsigned) strlen(tokval) + 1);
	121	(void) strcpy(*aname, tokval);
	122	} else {
	123	if (strcmp(*aname, tokval))
	124	goto next;
	125	}
	126	break;
	127	case PASSWD:
	128	if (strcmp(*aname, "anonymous") &&
	129	fstat(fileno(cfile), &stb) >= 0 &&
	130	(stb.st_mode & 077) != 0) {
	131	fprintf(stderr, "Error - .netrc file not correct mode.\n");
	132	fprintf(stderr, "Remove password or correct mode.\n");
	133	goto bad;
	134	}
	135	if (token() && *apass == 0) {
	136	*apass = malloc((unsigned) strlen(tokval) + 1);
	137	(void) strcpy(*apass, tokval);
	138	}
	139	break;
	140	case ACCOUNT:
	141	if (fstat(fileno(cfile), &stb) >= 0
	142	&& (stb.st_mode & 077) != 0) {
	143	fprintf(stderr, "Error - .netrc file not correct mode.\n");
	144	fprintf(stderr, "Remove account or correct mode.\n");
	145	goto bad;
	146	}
	147	if (token() && *aacct == 0) {
	148	*aacct = malloc((unsigned) strlen(tokval) + 1);
	149	(void) strcpy(*aacct, tokval);
	150	}
	151	break;
	152	case MACDEF:
	153	if (proxy) {
	154	(void) fclose(cfile);
	155	return(0);
	156	}
	157	while ((c=getc(cfile)) != EOF && c == ' ' \|\| c == '\t');
	158	if (c == EOF \|\| c == '\n') {
	159	printf("Missing macdef name argument.\n");
	160	goto bad;
	161	}
	162	if (macnum == 16) {
	163	printf("Limit of 16 macros have already been defined\n");
	164	goto bad;
	165	}
	166	tmp = macros[macnum].mac_name;
	167	*tmp++ = c;
	168	for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
	169	!isspace(c); ++i) {
	170	*tmp++ = c;
	171	}
	172	if (c == EOF) {
	173	printf("Macro definition missing null line terminator.\n");
	174	goto bad;
	175	}
	176	*tmp = '\0';
	177	if (c != '\n') {
	178	while ((c=getc(cfile)) != EOF && c != '\n');
	179	}
	180	if (c == EOF) {
	181	printf("Macro definition missing null line terminator.\n");
	182	goto bad;
	183	}
	184	if (macnum == 0) {
	185	macros[macnum].mac_start = macbuf;
	186	}
	187	else {
	188	macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
	189	}
	190	tmp = macros[macnum].mac_start;
	191	while (tmp != macbuf + 4096) {
	192	if ((c=getc(cfile)) == EOF) {
	193	printf("Macro definition missing null line terminator.\n");
	194	goto bad;
	195	}
	196	*tmp = c;
	197	if (*tmp == '\n') {
	198	if (*(tmp-1) == '\0') {
	199	macros[macnum++].mac_end = tmp - 1;
	200	break;
	201	}
	202	*tmp = '\0';
	203	}
	204	tmp++;
	205	}
	206	if (tmp == macbuf + 4096) {
	207	printf("4K macro buffer exceeded\n");
	208	goto bad;
	209	}
	210	break;
	211	default:
	212	fprintf(stderr, "Unknown .netrc keyword %s\n", tokval);
	213	break;
	214	}
	215	goto done;
	216	}
	217	done:
	218	(void) fclose(cfile);
	219	return(0);
	220	bad:
	221	(void) fclose(cfile);
	222	return(-1);
	223	}
	224
	225	static
	226	token()
	227	{
	228	char *cp;
	229	int c;
	230	struct toktab *t;
	231
	232	if (feof(cfile))
	233	return (0);
	234	while ((c = getc(cfile)) != EOF &&
	235	(c == '\n' \|\| c == '\t' \|\| c == ' ' \|\| c == ','))
	236	continue;
	237	if (c == EOF)
	238	return (0);
	239	cp = tokval;
	240	if (c == '"') {
	241	while ((c = getc(cfile)) != EOF && c != '"') {
	242	if (c == '\\')
	243	c = getc(cfile);
	244	*cp++ = c;
	245	}
	246	} else {
	247	*cp++ = c;
	248	while ((c = getc(cfile)) != EOF
	249	&& c != '\n' && c != '\t' && c != ' ' && c != ',') {
	250	if (c == '\\')
	251	c = getc(cfile);
	252	*cp++ = c;
	253	}
	254	}
	255	*cp = 0;
	256	if (tokval[0] == 0)
	257	return (0);
	258	for (t = toktab; t->tokstr; t++)
	259	if (!strcmp(t->tokstr, tokval))
	260	return (t->tval);
	261	return (ID);
	262	}