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usr / src / crypto / heimdal / lib / roken /

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📄 ChangeLog(61.03 KB)
📄 Makefile.am(4.47 KB)
📄 Makefile.in(126.5 KB)
📄 base64-test.c(2.95 KB)
📄 base64.c(3.69 KB)
📄 base64.h(1.99 KB)
📄 bswap.c(2.01 KB)
📄 chown.c(1.75 KB)
📄 cloexec.c(2.05 KB)
📄 closefrom.c(1.92 KB)
📄 concat.c(2.91 KB)
📄 copyhostent.c(3.07 KB)
📄 ct.c(2.34 KB)
📄 daemon.c(2.36 KB)
📄 doxygen.c(1.89 KB)
📄 dumpdata.c(2.62 KB)
📄 ecalloc.3(2.71 KB)
📄 ecalloc.c(1.96 KB)
📄 emalloc.c(1.91 KB)
📄 environment.c(3.76 KB)
📄 eread.c(1.9 KB)
📄 erealloc.c(1.93 KB)
📄 err.c(1.8 KB)
📄 err.hin(3.02 KB)
📄 errx.c(1.8 KB)
📄 esetenv.c(1.88 KB)
📄 estrdup.c(1.89 KB)
📄 ewrite.c(1.91 KB)
📄 fchown.c(1.75 KB)
📄 flock.c(3.82 KB)
📄 fnmatch.c(5.05 KB)
📄 fnmatch.hin(2.3 KB)
📄 freeaddrinfo.c(1.94 KB)
📄 freehostent.c(2.03 KB)
📄 gai_strerror.c(2.62 KB)
📄 get_default_username.c(2.58 KB)
📄 get_window_size.c(3.38 KB)
📄 getaddrinfo-test.c(4.04 KB)
📄 getaddrinfo.c(10.05 KB)
📄 getaddrinfo_hostspec.c(3.17 KB)
📄 getarg.3(9.56 KB)
📄 getarg.c(15.34 KB)
📄 getarg.h(3.15 KB)
📄 getcap.c(25.29 KB)
📄 getcwd.c(1.94 KB)
📄 getdtablesize.c(2.89 KB)
📄 getegid.c(1.76 KB)
📄 geteuid.c(1.76 KB)
📄 getgid.c(1.75 KB)
📄 gethostname.c(2.34 KB)
📄 getifaddrs.c(32.46 KB)
📄 getipnodebyaddr.c(2.33 KB)
📄 getipnodebyname.c(2.52 KB)
📄 getnameinfo.c(3.51 KB)
📄 getnameinfo_verified.c(3.14 KB)
📄 getopt.c(3.82 KB)
📄 getprogname.c(1.84 KB)
📄 gettimeofday.c(2.43 KB)
📄 getuid.c(1.75 KB)
📄 getusershell.c(4.47 KB)
📄 glob.c(19.59 KB)
📄 glob.hin(3.83 KB)
📄 h_errno.c(1.69 KB)
📄 hex-test.c(3.02 KB)
📄 hex.c(2.85 KB)
📄 hex.h(2.08 KB)
📄 hostent_find_fqdn.c(2.05 KB)
📄 hstrerror.c(2.54 KB)
📄 ifaddrs.hin(2.52 KB)
📄 inet_aton.c(1.94 KB)
📄 inet_ntop.c(3.97 KB)
📄 inet_pton.c(2.94 KB)
📄 initgroups.c(1.75 KB)
📄 innetgr.c(1.79 KB)
📄 install-sh(5.47 KB)
📄 iruserok.c(7.48 KB)
📄 issuid.c(2.01 KB)
📄 k_getpwnam.c(2.08 KB)
📄 k_getpwuid.c(2.07 KB)
📄 localtime_r.c(2.03 KB)
📄 lstat.c(1.76 KB)
📄 memmove.c(2.02 KB)
📄 mini_inetd.c(5.67 KB)
📄 missing(6.14 KB)
📄 mkinstalldirs(671 B)
📄 mkstemp.c(2.4 KB)
📄 ndbm_wrap.c(5.18 KB)
📄 ndbm_wrap.h(3.13 KB)
📄 net_read.c(3.13 KB)
📄 net_write.c(2.9 KB)
📄 parse_bytes-test.c(2.81 KB)
📄 parse_bytes.c(2.55 KB)
📄 parse_bytes.h(2.13 KB)
📄 parse_reply-test.c(3.49 KB)
📄 parse_time-test.c(4.07 KB)
📄 parse_time.3(4.82 KB)
📄 parse_time.c(2.49 KB)
📄 parse_time.h(2.19 KB)
📄 parse_units.c(7.41 KB)
📄 parse_units.h(2.73 KB)
📄 putenv.c(2.51 KB)
📄 qsort.c(5.35 KB)
📄 rand.c(1.84 KB)
📄 rcmd.c(1.92 KB)
📄 readv.c(2.17 KB)
📄 realloc.c(1.83 KB)
📄 recvmsg.c(2.26 KB)
📄 resolve-test.c(4.91 KB)
📄 resolve.c(21.5 KB)
📄 resolve.h(7.26 KB)
📄 rkpty.c(7.89 KB)
📄 roken-common.h(11.68 KB)
📄 roken.awk(875 B)
📄 roken.h.in(27.79 KB)
📄 roken_gethostby.c(7.26 KB)
📄 rtbl.3(6.53 KB)
📄 rtbl.c(12.11 KB)
📄 rtbl.h(3.61 KB)
📄 search.hin(1007 B)
📄 sendmsg.c(5.37 KB)
📄 setegid.c(1.9 KB)
📄 setenv.c(2.37 KB)
📄 seteuid.c(1.9 KB)
📄 setprogname.c(2.44 KB)
📄 signal.c(2.34 KB)
📄 simple_exec.c(7.51 KB)
📄 snprintf-test.c(8.16 KB)
📄 snprintf.c(14.93 KB)
📄 socket.c(7.89 KB)
📄 socket_wrapper.c(40.97 KB)
📄 socket_wrapper.h(4.52 KB)
📄 strcasecmp.c(2 KB)
📄 strcollect.c(2.64 KB)
📄 strdup.c(1.84 KB)
📄 strerror.c(2 KB)
📄 strerror_r.c(2.73 KB)
📄 strftime.c(8.32 KB)
📄 strlcat.c(2.21 KB)
📄 strlcpy.c(2.23 KB)
📄 strlwr.c(1.86 KB)
📄 strncasecmp.c(2.04 KB)
📄 strndup.c(1.96 KB)
📄 strnlen.c(1.79 KB)
📄 strpftime-test.c(6.04 KB)
📄 strpftime-test.h(2.19 KB)
📄 strpool.c(2.74 KB)
📄 strptime.c(9.21 KB)
📄 strsep.c(1.95 KB)
📄 strsep_copy.c(2.22 KB)
📄 strtok_r.c(2.05 KB)
📄 strupr.c(1.86 KB)
📄 swab.c(1.87 KB)
📄 test-mem.c(4.96 KB)
📄 test-mem.h(1.85 KB)
📄 test-readenv.c(3 KB)
📄 timegm.c(2.72 KB)
📄 timeval.c(2.34 KB)
📄 tm2time.c(2.01 KB)
📄 tsearch.c(4.17 KB)
📄 unsetenv.c(2.14 KB)
📄 unvis.c(6.39 KB)
📄 verify.c(2.1 KB)
📄 verr.c(1.79 KB)
📄 verrx.c(1.79 KB)
📄 version-script.map(3.33 KB)
📄 vis.c(11.45 KB)
📄 vis.hin(4.38 KB)
📄 vsyslog.c(3.13 KB)
📄 vwarn.c(1.77 KB)
📄 vwarnx.c(1.77 KB)
📄 warn.c(1.75 KB)
📄 warnerr.c(2.12 KB)
📄 warnx.c(1.79 KB)
📄 write_pid.c(2.65 KB)
📄 writev.c(2.15 KB)
📄 xdbm.h(1.91 KB)
📄 xfree.c(1.7 KB)

Editing: iruserok.c

/*
 * Copyright (c) 1983, 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.
 * 3. 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 <config.h>

#include <stdio.h>
#include <ctype.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_NETINET6_IN6_H
#include <netinet6/in6.h>
#endif
#ifdef HAVE_RPCSVC_YPCLNT_H
#include <rpcsvc/ypclnt.h>
#endif

#include "roken.h"

int     __check_rhosts_file = 1;
char    *__rcmd_errstr = 0;

/*
 * Returns "true" if match, 0 if no match.
 */
static
int
__icheckhost(unsigned raddr, const char *lhost)
{
	struct hostent *hp;
	u_long laddr;
	char **pp;

/* Try for raw ip address first. */
	if (isdigit((unsigned char)*lhost)
	    && (long)(laddr = inet_addr(lhost)) != -1)
		return (raddr == laddr);

/* Better be a hostname. */
	if ((hp = gethostbyname(lhost)) == NULL)
		return (0);

/* Spin through ip addresses. */
	for (pp = hp->h_addr_list; *pp; ++pp)
	        if (memcmp(&raddr, *pp, sizeof(u_long)) == 0)
			return (1);

/* No match. */
	return (0);
}

/*
 * Returns 0 if ok, -1 if not ok.
 */
static
int
__ivaliduser(FILE *hostf, unsigned raddr, const char *luser,
	     const char *ruser)
{
	char *user, *p;
	int ch;
	char buf[MaxHostNameLen + 128];		/* host + login */
	char hname[MaxHostNameLen];
	struct hostent *hp;
	/* Presumed guilty until proven innocent. */
	int userok = 0, hostok = 0;
#ifdef HAVE_YP_GET_DEFAULT_DOMAIN
	char *ypdomain;

if (yp_get_default_domain(&ypdomain))
		ypdomain = NULL;
#else
#define	ypdomain NULL
#endif
	/* We need to get the damn hostname back for netgroup matching. */
	if ((hp = gethostbyaddr((char *)&raddr,
				sizeof(u_long),
				AF_INET)) == NULL)
		return (-1);
	strlcpy(hname, hp->h_name, sizeof(hname));

while (fgets(buf, sizeof(buf), hostf)) {
		p = buf;
		/* Skip lines that are too long. */
		if (strchr(p, '\n') == NULL) {
			while ((ch = getc(hostf)) != '\n' && ch != EOF);
			continue;
		}
		if (*p == '\n' || *p == '#') {
			/* comment... */
			continue;
		}
		while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0') {
		        if (isupper((unsigned char)*p))
			    *p = tolower((unsigned char)*p);
			p++;
		}
		if (*p == ' ' || *p == '\t') {
			*p++ = '\0';
			while (*p == ' ' || *p == '\t')
				p++;
			user = p;
			while (*p != '\n' && *p != ' ' &&
			    *p != '\t' && *p != '\0')
				p++;
		} else
			user = p;
		*p = '\0';
		/*
		 * Do +/- and +@/-@ checking. This looks really nasty,
		 * but it matches SunOS's behavior so far as I can tell.
		 */
		switch(buf[0]) {
		case '+':
			if (!buf[1]) {     /* '+' matches all hosts */
				hostok = 1;
				break;
			}
			if (buf[1] == '@')  /* match a host by netgroup */
				hostok = innetgr((char *)&buf[2],
					(char *)&hname, NULL, ypdomain);
			else		/* match a host by addr */
				hostok = __icheckhost(raddr,(char *)&buf[1]);
			break;
		case '-':     /* reject '-' hosts and all their users */
			if (buf[1] == '@') {
				if (innetgr((char *)&buf[2],
					      (char *)&hname, NULL, ypdomain))
					return(-1);
			} else {
				if (__icheckhost(raddr,(char *)&buf[1]))
					return(-1);
			}
			break;
		default:  /* if no '+' or '-', do a simple match */
			hostok = __icheckhost(raddr, buf);
			break;
		}
		switch(*user) {
		case '+':
			if (!*(user+1)) {      /* '+' matches all users */
				userok = 1;
				break;
			}
			if (*(user+1) == '@')  /* match a user by netgroup */
				userok = innetgr(user+2, NULL, (char *)ruser,
						 ypdomain);
			else	   /* match a user by direct specification */
				userok = !(strcmp(ruser, user+1));
			break;
		case '-': 		/* if we matched a hostname, */
			if (hostok) {   /* check for user field rejections */
				if (!*(user+1))
					return(-1);
				if (*(user+1) == '@') {
					if (innetgr(user+2, NULL,
						    (char *)ruser, ypdomain))
						return(-1);
				} else {
					if (!strcmp(ruser, user+1))
						return(-1);
				}
			}
			break;
		default:	/* no rejections: try to match the user */
			if (hostok)
				userok = !(strcmp(ruser,*user ? user : luser));
			break;
		}
		if (hostok && userok)
			return(0);
	}
	return (-1);
}

/*
 * New .rhosts strategy: We are passed an ip address. We spin through
 * hosts.equiv and .rhosts looking for a match. When the .rhosts only
 * has ip addresses, we don't have to trust a nameserver.  When it
 * contains hostnames, we spin through the list of addresses the nameserver
 * gives us and look for a match.
 *
 * Returns 0 if ok, -1 if not ok.
 */
ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
iruserok(unsigned raddr, int superuser, const char *ruser, const char *luser)
{
	char *cp;
	struct stat sbuf;
	struct passwd *pwd;
	FILE *hostf;
	uid_t uid;
	int first;
	char pbuf[MaxPathLen];

first = 1;
	hostf = superuser ? NULL : fopen(_PATH_HEQUIV, "r");
again:
	if (hostf) {
		if (__ivaliduser(hostf, raddr, luser, ruser) == 0) {
			fclose(hostf);
			return (0);
		}
		fclose(hostf);
	}
	if (first == 1 && (__check_rhosts_file || superuser)) {
		first = 0;
		if ((pwd = k_getpwnam((char*)luser)) == NULL)
			return (-1);
		snprintf (pbuf, sizeof(pbuf), "%s/.rhosts", pwd->pw_dir);

/*
		 * Change effective uid while opening .rhosts.  If root and
		 * reading an NFS mounted file system, can't read files that
		 * are protected read/write owner only.
		 */
		uid = geteuid();
		if (seteuid(pwd->pw_uid) < 0)
			return (-1);
		hostf = fopen(pbuf, "r");
		seteuid(uid);

if (hostf == NULL)
			return (-1);
		/*
		 * If not a regular file, or is owned by someone other than
		 * user or root or if writeable by anyone but the owner, quit.
		 */
		cp = NULL;
		if (lstat(pbuf, &sbuf) < 0)
			cp = ".rhosts lstat failed";
		else if (!S_ISREG(sbuf.st_mode))
			cp = ".rhosts not regular file";
		else if (fstat(fileno(hostf), &sbuf) < 0)
			cp = ".rhosts fstat failed";
		else if (sbuf.st_uid && sbuf.st_uid != pwd->pw_uid)
			cp = "bad .rhosts owner";
		else if (sbuf.st_mode & (S_IWGRP|S_IWOTH))
			cp = ".rhosts writeable by other than owner";
		/* If there were any problems, quit. */
		if (cp) {
			__rcmd_errstr = cp;
			fclose(hostf);
			return (-1);
		}
		goto again;
	}
	return (-1);
}

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Editing: iruserok.c

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