314 lines
7.7 KiB
C
314 lines
7.7 KiB
C
/*
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* Copyright (c) 1985, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "ftp_locl.h"
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RCSID("$Id: ruserpass.c,v 1.19 2000/01/08 07:45:11 assar Exp $");
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static int token (void);
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static FILE *cfile;
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#define DEFAULT 1
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#define LOGIN 2
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#define PASSWD 3
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#define ACCOUNT 4
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#define MACDEF 5
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#define PROT 6
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#define ID 10
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#define MACH 11
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static char tokval[100];
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static struct toktab {
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char *tokstr;
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int tval;
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} toktab[]= {
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{ "default", DEFAULT },
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{ "login", LOGIN },
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{ "password", PASSWD },
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{ "passwd", PASSWD },
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{ "account", ACCOUNT },
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{ "machine", MACH },
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{ "macdef", MACDEF },
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{ "prot", PROT },
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{ NULL, 0 }
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};
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/*
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* Write a copy of the hostname into `hostname, sz' and return a guess
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* as to the `domain' of that hostname.
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*/
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static char *
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guess_domain (char *hostname, size_t sz)
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{
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struct addrinfo *ai, *a;
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struct addrinfo hints;
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int error;
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char *dot;
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if (gethostname (hostname, sz) < 0) {
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strlcpy (hostname, "", sz);
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return "";
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}
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dot = strchr (hostname, '.');
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if (dot != NULL)
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return dot + 1;
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memset (&hints, 0, sizeof(hints));
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hints.ai_flags = AI_CANONNAME;
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error = getaddrinfo (hostname, NULL, &hints, &ai);
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if (error)
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return hostname;
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for (a = ai; a != NULL; a = a->ai_next)
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if (a->ai_canonname != NULL) {
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strlcpy (hostname, ai->ai_canonname, sz);
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break;
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}
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freeaddrinfo (ai);
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dot = strchr (hostname, '.');
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if (dot != NULL)
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return dot + 1;
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else
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return hostname;
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}
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int
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ruserpass(char *host, char **aname, char **apass, char **aacct)
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{
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char *hdir, buf[BUFSIZ], *tmp;
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int t, i, c, usedefault = 0;
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struct stat stb;
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mydomain = guess_domain (myhostname, MaxHostNameLen);
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hdir = getenv("HOME");
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if (hdir == NULL)
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hdir = ".";
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snprintf(buf, sizeof(buf), "%s/.netrc", hdir);
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cfile = fopen(buf, "r");
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if (cfile == NULL) {
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if (errno != ENOENT)
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warn("%s", buf);
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return (0);
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}
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next:
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while ((t = token())) switch(t) {
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case DEFAULT:
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usedefault = 1;
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/* FALL THROUGH */
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case MACH:
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if (!usedefault) {
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if (token() != ID)
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continue;
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/*
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* Allow match either for user's input host name
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* or official hostname. Also allow match of
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* incompletely-specified host in local domain.
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*/
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if (strcasecmp(host, tokval) == 0)
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goto match;
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if (strcasecmp(hostname, tokval) == 0)
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goto match;
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if ((tmp = strchr(hostname, '.')) != NULL &&
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tmp++ &&
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strcasecmp(tmp, mydomain) == 0 &&
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strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
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tokval[tmp - hostname] == '\0')
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goto match;
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if ((tmp = strchr(host, '.')) != NULL &&
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tmp++ &&
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strcasecmp(tmp, mydomain) == 0 &&
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strncasecmp(host, tokval, tmp - host) == 0 &&
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tokval[tmp - host] == '\0')
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goto match;
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continue;
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}
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match:
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while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
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case LOGIN:
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if (token()) {
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if (*aname == 0) {
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*aname = strdup(tokval);
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} else {
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if (strcmp(*aname, tokval))
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goto next;
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}
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}
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break;
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case PASSWD:
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if ((*aname == NULL || strcmp(*aname, "anonymous")) &&
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fstat(fileno(cfile), &stb) >= 0 &&
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(stb.st_mode & 077) != 0) {
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warnx("Error: .netrc file is readable by others.");
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warnx("Remove password or make file unreadable by others.");
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goto bad;
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}
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if (token() && *apass == 0) {
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*apass = strdup(tokval);
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}
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break;
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case ACCOUNT:
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if (fstat(fileno(cfile), &stb) >= 0
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&& (stb.st_mode & 077) != 0) {
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warnx("Error: .netrc file is readable by others.");
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warnx("Remove account or make file unreadable by others.");
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goto bad;
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}
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if (token() && *aacct == 0) {
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*aacct = strdup(tokval);
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}
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break;
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case MACDEF:
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if (proxy) {
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fclose(cfile);
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return (0);
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}
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while ((c=getc(cfile)) != EOF &&
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(c == ' ' || c == '\t'));
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if (c == EOF || c == '\n') {
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printf("Missing macdef name argument.\n");
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goto bad;
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}
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if (macnum == 16) {
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printf("Limit of 16 macros have already been defined\n");
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goto bad;
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}
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tmp = macros[macnum].mac_name;
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*tmp++ = c;
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for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
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!isspace(c); ++i) {
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*tmp++ = c;
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}
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if (c == EOF) {
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printf("Macro definition missing null line terminator.\n");
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goto bad;
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}
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*tmp = '\0';
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if (c != '\n') {
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while ((c=getc(cfile)) != EOF && c != '\n');
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}
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if (c == EOF) {
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printf("Macro definition missing null line terminator.\n");
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goto bad;
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}
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if (macnum == 0) {
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macros[macnum].mac_start = macbuf;
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}
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else {
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macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
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}
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tmp = macros[macnum].mac_start;
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while (tmp != macbuf + 4096) {
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if ((c=getc(cfile)) == EOF) {
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printf("Macro definition missing null line terminator.\n");
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goto bad;
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}
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*tmp = c;
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if (*tmp == '\n') {
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if (*(tmp-1) == '\0') {
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macros[macnum++].mac_end = tmp - 1;
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break;
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}
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*tmp = '\0';
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}
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tmp++;
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}
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if (tmp == macbuf + 4096) {
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printf("4K macro buffer exceeded\n");
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goto bad;
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}
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break;
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case PROT:
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token();
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if(sec_request_prot(tokval) < 0)
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warnx("Unknown protection level \"%s\"", tokval);
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break;
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default:
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warnx("Unknown .netrc keyword %s", tokval);
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break;
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}
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goto done;
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}
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done:
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fclose(cfile);
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return (0);
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bad:
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fclose(cfile);
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return (-1);
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}
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static int
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token(void)
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{
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char *cp;
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int c;
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struct toktab *t;
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if (feof(cfile) || ferror(cfile))
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return (0);
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while ((c = getc(cfile)) != EOF &&
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(c == '\n' || c == '\t' || c == ' ' || c == ','))
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continue;
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if (c == EOF)
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return (0);
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cp = tokval;
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if (c == '"') {
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while ((c = getc(cfile)) != EOF && c != '"') {
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if (c == '\\')
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c = getc(cfile);
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*cp++ = c;
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}
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} else {
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*cp++ = c;
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while ((c = getc(cfile)) != EOF
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&& c != '\n' && c != '\t' && c != ' ' && c != ',') {
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if (c == '\\')
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c = getc(cfile);
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*cp++ = c;
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}
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}
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*cp = 0;
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if (tokval[0] == 0)
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return (0);
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for (t = toktab; t->tokstr; t++)
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if (!strcmp(t->tokstr, tokval))
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return (t->tval);
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return (ID);
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}
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