[unix-history] / usr / src / usr.bin / ftp / ruserpass.c

/*
 * Copyright (c) 1985, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)ruserpass.c	8.1 (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;
	static int token();

	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 is readable by others.\n");
	fprintf(stderr, 
		"Remove password or make file unreadable by others.\n\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 is readable by others.\n");
	fprintf(stderr, 
		"Remove account or make file unreadable by others.\n\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) || ferror(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
3a38a184	1	/*
2c4b3588 KB	2	* Copyright (c) 1985, 1993
2c4b3588 KB	3	* The Regents of the University of California. All rights reserved.
11c5f0a3	4	*
1343342a	5	* %sccs.include.redist.c%
3a38a184 GM	6	*/
	7
	8	#ifndef lint
2c4b3588	9	static char sccsid[] = "@(#)ruserpass.c 8.1 (Berkeley) %G%";
11c5f0a3	10	#endif /* not lint */
3a38a184	11
385d0849	12	#include <sys/types.h>
3a38a184 GM	13	#include <stdio.h>
	14	#include <utmp.h>
	15	#include <ctype.h>
3a38a184 GM	16	#include <sys/stat.h>
3a38a184 GM	17	#include <errno.h>
cdc35b45	18	#include "ftp_var.h"
3a38a184 GM	19
3a38a184 GM	20	char renvlook(), malloc(), index(), getenv(), getpass(), getlogin();
04480325	21	char *strcpy();
3a38a184 GM	22	struct utmp *getutmp();
	23	static FILE *cfile;
	24
3a38a184 GM	25	#define DEFAULT 1
	26	#define LOGIN 2
	27	#define PASSWD 3
	28	#define ACCOUNT 4
	29	#define MACDEF 5
	30	#define ID 10
cdc35b45	31	#define MACH 11
3a38a184 GM	32
	33	static char tokval[100];
	34
	35	static struct toktab {
	36	char *tokstr;
	37	int tval;
	38	} toktab[]= {
	39	"default", DEFAULT,
	40	"login", LOGIN,
	41	"password", PASSWD,
cdc35b45	42	"passwd", PASSWD,
3a38a184	43	"account", ACCOUNT,
cdc35b45	44	"machine", MACH,
3a38a184 GM	45	"macdef", MACDEF,
	46	0, 0
	47	};
	48
cdc35b45	49	ruserpass(host, aname, apass, aacct)
3a38a184 GM	50	char host, aname, apass, *aacct;
3a38a184 GM	51	{
04480325	52	char hdir, buf[BUFSIZ], tmp;
cdc35b45	53	char myname[MAXHOSTNAMELEN], *mydomain;
ff00793c	54	int t, i, c, usedefault = 0;
3a38a184	55	struct stat stb;
b61c5edc	56	static int token();
3a38a184 GM	57
	58	hdir = getenv("HOME");
	59	if (hdir == NULL)
	60	hdir = ".";
04480325	61	(void) sprintf(buf, "%s/.netrc", hdir);
3a38a184 GM	62	cfile = fopen(buf, "r");
	63	if (cfile == NULL) {
	64	if (errno != ENOENT)
	65	perror(buf);
	66	return(0);
	67	}
cdc35b45 MK	68	if (gethostname(myname, sizeof(myname)) < 0)
	69	myname[0] = '\0';
	70	if ((mydomain = index(myname, '.')) == NULL)
	71	mydomain = "";
3a38a184 GM	72	next:
	73	while ((t = token())) switch(t) {
	74
	75	case DEFAULT:
ff00793c MK	76	usedefault = 1;
ff00793c MK	77	/* FALL THROUGH */
3a38a184	78
cdc35b45 MK	79	case MACH:
	80	if (!usedefault) {
	81	if (token() != ID)
	82	continue;
	83	/*
	84	* Allow match either for user's input host name
	85	* or official hostname. Also allow match of
	86	* incompletely-specified host in local domain.
	87	*/
	88	if (strcasecmp(host, tokval) == 0)
	89	goto match;
	90	if (strcasecmp(hostname, tokval) == 0)
	91	goto match;
	92	if ((tmp = index(hostname, '.')) != NULL &&
	93	strcasecmp(tmp, mydomain) == 0 &&
	94	strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
	95	tokval[tmp - hostname] == '\0')
	96	goto match;
	97	if ((tmp = index(host, '.')) != NULL &&
	98	strcasecmp(tmp, mydomain) == 0 &&
	99	strncasecmp(host, tokval, tmp - host) == 0 &&
	100	tokval[tmp - host] == '\0')
	101	goto match;
3a38a184	102	continue;
cdc35b45 MK	103	}
	104	match:
	105	while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
3a38a184 GM	106
	107	case LOGIN:
	108	if (token())
	109	if (*aname == 0) {
04480325 GM	110	*aname = malloc((unsigned) strlen(tokval) + 1);
04480325 GM	111	(void) strcpy(*aname, tokval);
3a38a184 GM	112	} else {
	113	if (strcmp(*aname, tokval))
	114	goto next;
	115	}
	116	break;
	117	case PASSWD:
cdc35b45 MK	118	if (strcmp(*aname, "anonymous") &&
	119	fstat(fileno(cfile), &stb) >= 0 &&
	120	(stb.st_mode & 077) != 0) {
c4d7b824 AC	121	fprintf(stderr, "Error: .netrc file is readable by others.\n");
	122	fprintf(stderr,
	123	"Remove password or make file unreadable by others.\n\n");
cdc35b45	124	goto bad;
3a38a184 GM	125	}
3a38a184 GM	126	if (token() && *apass == 0) {
04480325 GM	127	*apass = malloc((unsigned) strlen(tokval) + 1);
04480325 GM	128	(void) strcpy(*apass, tokval);
3a38a184 GM	129	}
	130	break;
	131	case ACCOUNT:
	132	if (fstat(fileno(cfile), &stb) >= 0
	133	&& (stb.st_mode & 077) != 0) {
c4d7b824 AC	134	fprintf(stderr, "Error: .netrc file is readable by others.\n");
	135	fprintf(stderr,
	136	"Remove account or make file unreadable by others.\n\n");
cdc35b45	137	goto bad;
3a38a184 GM	138	}
3a38a184 GM	139	if (token() && *aacct == 0) {
04480325 GM	140	*aacct = malloc((unsigned) strlen(tokval) + 1);
04480325 GM	141	(void) strcpy(*aacct, tokval);
3a38a184 GM	142	}
	143	break;
	144	case MACDEF:
	145	if (proxy) {
cdc35b45	146	(void) fclose(cfile);
3a38a184 GM	147	return(0);
	148	}
	149	while ((c=getc(cfile)) != EOF && c == ' ' \|\| c == '\t');
	150	if (c == EOF \|\| c == '\n') {
	151	printf("Missing macdef name argument.\n");
cdc35b45	152	goto bad;
3a38a184 GM	153	}
	154	if (macnum == 16) {
	155	printf("Limit of 16 macros have already been defined\n");
cdc35b45	156	goto bad;
3a38a184 GM	157	}
	158	tmp = macros[macnum].mac_name;
	159	*tmp++ = c;
	160	for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
	161	!isspace(c); ++i) {
	162	*tmp++ = c;
	163	}
	164	if (c == EOF) {
	165	printf("Macro definition missing null line terminator.\n");
cdc35b45	166	goto bad;
3a38a184 GM	167	}
	168	*tmp = '\0';
	169	if (c != '\n') {
	170	while ((c=getc(cfile)) != EOF && c != '\n');
	171	}
	172	if (c == EOF) {
	173	printf("Macro definition missing null line terminator.\n");
cdc35b45	174	goto bad;
3a38a184 GM	175	}
	176	if (macnum == 0) {
	177	macros[macnum].mac_start = macbuf;
	178	}
	179	else {
	180	macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
	181	}
	182	tmp = macros[macnum].mac_start;
	183	while (tmp != macbuf + 4096) {
	184	if ((c=getc(cfile)) == EOF) {
	185	printf("Macro definition missing null line terminator.\n");
cdc35b45	186	goto bad;
3a38a184 GM	187	}
	188	*tmp = c;
	189	if (*tmp == '\n') {
	190	if (*(tmp-1) == '\0') {
	191	macros[macnum++].mac_end = tmp - 1;
	192	break;
	193	}
	194	*tmp = '\0';
	195	}
	196	tmp++;
	197	}
	198	if (tmp == macbuf + 4096) {
	199	printf("4K macro buffer exceeded\n");
cdc35b45	200	goto bad;
3a38a184 GM	201	}
	202	break;
	203	default:
e6be46b8	204	fprintf(stderr, "Unknown .netrc keyword %s\n", tokval);
3a38a184 GM	205	break;
	206	}
	207	goto done;
	208	}
	209	done:
04480325 GM	210	(void) fclose(cfile);
04480325 GM	211	return(0);
cdc35b45 MK	212	bad:
	213	(void) fclose(cfile);
	214	return(-1);
3a38a184 GM	215	}
	216
	217	static
	218	token()
	219	{
	220	char *cp;
	221	int c;
	222	struct toktab *t;
	223
c4d7b824	224	if (feof(cfile) \|\| ferror(cfile))
3a38a184 GM	225	return (0);
	226	while ((c = getc(cfile)) != EOF &&
	227	(c == '\n' \|\| c == '\t' \|\| c == ' ' \|\| c == ','))
	228	continue;
	229	if (c == EOF)
	230	return (0);
	231	cp = tokval;
	232	if (c == '"') {
	233	while ((c = getc(cfile)) != EOF && c != '"') {
	234	if (c == '\\')
	235	c = getc(cfile);
	236	*cp++ = c;
	237	}
	238	} else {
	239	*cp++ = c;
	240	while ((c = getc(cfile)) != EOF
	241	&& c != '\n' && c != '\t' && c != ' ' && c != ',') {
	242	if (c == '\\')
	243	c = getc(cfile);
	244	*cp++ = c;
	245	}
	246	}
	247	*cp = 0;
	248	if (tokval[0] == 0)
	249	return (0);
	250	for (t = toktab; t->tokstr; t++)
	251	if (!strcmp(t->tokstr, tokval))
	252	return (t->tval);
	253	return (ID);
	254	}