1 /* $NetBSD: ruserpass.c,v 1.28 2000/11/15 00:11:04 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1985, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)ruserpass.c 8.4 (Berkeley) 4/27/95"; 40 #else 41 __RCSID("$NetBSD: ruserpass.c,v 1.28 2000/11/15 00:11:04 lukem Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/stat.h> 47 48 #include <ctype.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <netdb.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 57 #include "ftp_var.h" 58 59 static int token(void); 60 static FILE *cfile; 61 62 #define DEFAULT 1 63 #define LOGIN 2 64 #define PASSWD 3 65 #define ACCOUNT 4 66 #define MACDEF 5 67 #define ID 10 68 #define MACH 11 69 70 static char tokval[100]; 71 72 static struct toktab { 73 char *tokstr; 74 int tval; 75 } toktab[] = { 76 { "default", DEFAULT }, 77 { "login", LOGIN }, 78 { "password", PASSWD }, 79 { "passwd", PASSWD }, 80 { "account", ACCOUNT }, 81 { "machine", MACH }, 82 { "macdef", MACDEF }, 83 { NULL, 0 } 84 }; 85 86 int 87 ruserpass(const char *host, const char **aname, const char **apass, 88 const char **aacct) 89 { 90 char *tmp; 91 char myname[MAXHOSTNAMELEN + 1], *mydomain; 92 int t, i, c, usedefault = 0; 93 struct stat stb; 94 95 if (netrc[0] == '\0') 96 return (0); 97 cfile = fopen(netrc, "r"); 98 if (cfile == NULL) { 99 if (errno != ENOENT) 100 warn("%s", netrc); 101 return (0); 102 } 103 if (gethostname(myname, sizeof(myname)) < 0) 104 myname[0] = '\0'; 105 myname[sizeof(myname) - 1] = '\0'; 106 if ((mydomain = strchr(myname, '.')) == NULL) 107 mydomain = ""; 108 next: 109 while ((t = token())) switch(t) { 110 111 case DEFAULT: 112 usedefault = 1; 113 /* FALL THROUGH */ 114 115 case MACH: 116 if (!usedefault) { 117 if (token() != ID) 118 continue; 119 /* 120 * Allow match either for user's input host name 121 * or official hostname. Also allow match of 122 * incompletely-specified host in local domain. 123 */ 124 if (strcasecmp(host, tokval) == 0) 125 goto match; 126 if (strcasecmp(hostname, tokval) == 0) 127 goto match; 128 if ((tmp = strchr(hostname, '.')) != NULL && 129 strcasecmp(tmp, mydomain) == 0 && 130 strncasecmp(hostname, tokval, tmp-hostname) == 0 && 131 tokval[tmp - hostname] == '\0') 132 goto match; 133 if ((tmp = strchr(host, '.')) != NULL && 134 strcasecmp(tmp, mydomain) == 0 && 135 strncasecmp(host, tokval, tmp - host) == 0 && 136 tokval[tmp - host] == '\0') 137 goto match; 138 continue; 139 } 140 match: 141 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { 142 143 case LOGIN: 144 if (token()) { 145 if (*aname == NULL) 146 *aname = xstrdup(tokval); 147 else { 148 if (strcmp(*aname, tokval)) 149 goto next; 150 } 151 } 152 break; 153 case PASSWD: 154 if ((*aname == NULL || strcmp(*aname, "anonymous")) && 155 fstat(fileno(cfile), &stb) >= 0 && 156 (stb.st_mode & 077) != 0) { 157 warnx("Error: .netrc file is readable by others."); 158 warnx("Remove password or make file unreadable by others."); 159 goto bad; 160 } 161 if (token() && *apass == NULL) 162 *apass = xstrdup(tokval); 163 break; 164 case ACCOUNT: 165 if (fstat(fileno(cfile), &stb) >= 0 166 && (stb.st_mode & 077) != 0) { 167 warnx("Error: .netrc file is readable by others."); 168 warnx("Remove account or make file unreadable by others."); 169 goto bad; 170 } 171 if (token() && *aacct == NULL) 172 *aacct = xstrdup(tokval); 173 break; 174 case MACDEF: 175 if (proxy) { 176 (void)fclose(cfile); 177 return (0); 178 } 179 while ((c = getc(cfile)) != EOF) 180 if (c != ' ' && c != '\t') 181 break; 182 if (c == EOF || c == '\n') { 183 fputs("Missing macdef name argument.\n", 184 ttyout); 185 goto bad; 186 } 187 if (macnum == 16) { 188 fputs( 189 "Limit of 16 macros have already been defined.\n", 190 ttyout); 191 goto bad; 192 } 193 tmp = macros[macnum].mac_name; 194 *tmp++ = c; 195 for (i = 0; i < 8 && (c = getc(cfile)) != EOF && 196 !isspace(c); ++i) { 197 *tmp++ = c; 198 } 199 if (c == EOF) { 200 fputs( 201 "Macro definition missing null line terminator.\n", 202 ttyout); 203 goto bad; 204 } 205 *tmp = '\0'; 206 if (c != '\n') { 207 while ((c = getc(cfile)) != EOF && c != '\n'); 208 } 209 if (c == EOF) { 210 fputs( 211 "Macro definition missing null line terminator.\n", 212 ttyout); 213 goto bad; 214 } 215 if (macnum == 0) { 216 macros[macnum].mac_start = macbuf; 217 } 218 else { 219 macros[macnum].mac_start = 220 macros[macnum-1].mac_end + 1; 221 } 222 tmp = macros[macnum].mac_start; 223 while (tmp != macbuf + 4096) { 224 if ((c = getc(cfile)) == EOF) { 225 fputs( 226 "Macro definition missing null line terminator.\n", 227 ttyout); 228 goto bad; 229 } 230 *tmp = c; 231 if (*tmp == '\n') { 232 if (*(tmp-1) == '\0') { 233 macros[macnum++].mac_end = tmp - 1; 234 break; 235 } 236 *tmp = '\0'; 237 } 238 tmp++; 239 } 240 if (tmp == macbuf + 4096) { 241 fputs("4K macro buffer exceeded.\n", 242 ttyout); 243 goto bad; 244 } 245 break; 246 default: 247 warnx("Unknown .netrc keyword %s", tokval); 248 break; 249 } 250 goto done; 251 } 252 done: 253 (void)fclose(cfile); 254 return (0); 255 bad: 256 (void)fclose(cfile); 257 return (-1); 258 } 259 260 static int 261 token(void) 262 { 263 char *cp; 264 int c; 265 struct toktab *t; 266 267 if (feof(cfile) || ferror(cfile)) 268 return (0); 269 while ((c = getc(cfile)) != EOF && 270 (c == '\n' || c == '\t' || c == ' ' || c == ',')) 271 continue; 272 if (c == EOF) 273 return (0); 274 cp = tokval; 275 if (c == '"') { 276 while ((c = getc(cfile)) != EOF && c != '"') { 277 if (c == '\\') 278 c = getc(cfile); 279 *cp++ = c; 280 } 281 } else { 282 *cp++ = c; 283 while ((c = getc(cfile)) != EOF 284 && c != '\n' && c != '\t' && c != ' ' && c != ',') { 285 if (c == '\\') 286 c = getc(cfile); 287 *cp++ = c; 288 } 289 } 290 *cp = 0; 291 if (tokval[0] == 0) 292 return (0); 293 for (t = toktab; t->tokstr; t++) 294 if (!strcmp(t->tokstr, tokval)) 295 return (t->tval); 296 return (ID); 297 } 298