ruserpass.c revision 1.15
1 /* $NetBSD: ruserpass.c,v 1.15 1997/11/01 14:37:03 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 1.15 1997/11/01 14:37:03 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 <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 56 #include "ftp_var.h" 57 58 static int token __P((void)); 59 static FILE *cfile; 60 61 #define DEFAULT 1 62 #define LOGIN 2 63 #define PASSWD 3 64 #define ACCOUNT 4 65 #define MACDEF 5 66 #define ID 10 67 #define MACH 11 68 69 static char tokval[100]; 70 71 static struct toktab { 72 char *tokstr; 73 int tval; 74 } toktab[]= { 75 { "default", DEFAULT }, 76 { "login", LOGIN }, 77 { "password", PASSWD }, 78 { "passwd", PASSWD }, 79 { "account", ACCOUNT }, 80 { "machine", MACH }, 81 { "macdef", MACDEF }, 82 { NULL, 0 } 83 }; 84 85 int 86 ruserpass(host, aname, apass, aacct) 87 const char *host; 88 char **aname, **apass, **aacct; 89 { 90 char *hdir, buf[BUFSIZ], *tmp; 91 char myname[MAXHOSTNAMELEN], *mydomain; 92 int t, i, c, usedefault = 0; 93 struct stat stb; 94 95 hdir = getenv("HOME"); 96 if (hdir == NULL) 97 hdir = "."; 98 if (strlen(hdir) + sizeof(".netrc") < sizeof(buf)) { 99 (void)snprintf(buf, sizeof buf, "%s/.netrc", hdir); 100 } else { 101 warnx("%s/.netrc: %s", hdir, strerror(ENAMETOOLONG)); 102 return (0); 103 } 104 cfile = fopen(buf, "r"); 105 if (cfile == NULL) { 106 if (errno != ENOENT) 107 warn("%s", buf); 108 return (0); 109 } 110 if (gethostname(myname, sizeof(myname)) < 0) 111 myname[0] = '\0'; 112 if ((mydomain = strchr(myname, '.')) == NULL) 113 mydomain = ""; 114 next: 115 while ((t = token())) switch(t) { 116 117 case DEFAULT: 118 usedefault = 1; 119 /* FALL THROUGH */ 120 121 case MACH: 122 if (!usedefault) { 123 if (token() != ID) 124 continue; 125 /* 126 * Allow match either for user's input host name 127 * or official hostname. Also allow match of 128 * incompletely-specified host in local domain. 129 */ 130 if (strcasecmp(host, tokval) == 0) 131 goto match; 132 if (strcasecmp(hostname, tokval) == 0) 133 goto match; 134 if ((tmp = strchr(hostname, '.')) != NULL && 135 strcasecmp(tmp, mydomain) == 0 && 136 strncasecmp(hostname, tokval, tmp-hostname) == 0 && 137 tokval[tmp - hostname] == '\0') 138 goto match; 139 if ((tmp = strchr(host, '.')) != NULL && 140 strcasecmp(tmp, mydomain) == 0 && 141 strncasecmp(host, tokval, tmp - host) == 0 && 142 tokval[tmp - host] == '\0') 143 goto match; 144 continue; 145 } 146 match: 147 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { 148 149 case LOGIN: 150 if (token()) 151 if (*aname == NULL) { 152 *aname = strdup(tokval); 153 if (*aname == NULL) 154 err(1, "can't strdup *aname"); 155 } else { 156 if (strcmp(*aname, tokval)) 157 goto next; 158 } 159 break; 160 case PASSWD: 161 if ((*aname == NULL || strcmp(*aname, "anonymous")) && 162 fstat(fileno(cfile), &stb) >= 0 && 163 (stb.st_mode & 077) != 0) { 164 warnx("Error: .netrc file is readable by others."); 165 warnx("Remove password or make file unreadable by others."); 166 goto bad; 167 } 168 if (token() && *apass == NULL) { 169 *apass = strdup(tokval); 170 if (*apass == NULL) 171 err(1, "can't strdup *apass"); 172 } 173 break; 174 case ACCOUNT: 175 if (fstat(fileno(cfile), &stb) >= 0 176 && (stb.st_mode & 077) != 0) { 177 warnx("Error: .netrc file is readable by others."); 178 warnx("Remove account or make file unreadable by others."); 179 goto bad; 180 } 181 if (token() && *aacct == NULL) { 182 *aacct = strdup(tokval); 183 if (*aacct == NULL) 184 err(1, "can't strdup *aacct"); 185 } 186 break; 187 case MACDEF: 188 if (proxy) { 189 (void)fclose(cfile); 190 return (0); 191 } 192 while ((c=getc(cfile)) != EOF) 193 if (c != ' ' && c != '\t') 194 break; 195 if (c == EOF || c == '\n') { 196 puts("Missing macdef name argument."); 197 goto bad; 198 } 199 if (macnum == 16) { 200 puts( 201 "Limit of 16 macros have already been defined."); 202 goto bad; 203 } 204 tmp = macros[macnum].mac_name; 205 *tmp++ = c; 206 for (i=0; i < 8 && (c=getc(cfile)) != EOF && 207 !isspace(c); ++i) { 208 *tmp++ = c; 209 } 210 if (c == EOF) { 211 puts( 212 "Macro definition missing null line terminator."); 213 goto bad; 214 } 215 *tmp = '\0'; 216 if (c != '\n') { 217 while ((c=getc(cfile)) != EOF && c != '\n'); 218 } 219 if (c == EOF) { 220 puts( 221 "Macro definition missing null line terminator."); 222 goto bad; 223 } 224 if (macnum == 0) { 225 macros[macnum].mac_start = macbuf; 226 } 227 else { 228 macros[macnum].mac_start = 229 macros[macnum-1].mac_end + 1; 230 } 231 tmp = macros[macnum].mac_start; 232 while (tmp != macbuf + 4096) { 233 if ((c=getc(cfile)) == EOF) { 234 puts( 235 "Macro definition missing null line terminator."); 236 goto bad; 237 } 238 *tmp = c; 239 if (*tmp == '\n') { 240 if (*(tmp-1) == '\0') { 241 macros[macnum++].mac_end = tmp - 1; 242 break; 243 } 244 *tmp = '\0'; 245 } 246 tmp++; 247 } 248 if (tmp == macbuf + 4096) { 249 puts("4K macro buffer exceeded."); 250 goto bad; 251 } 252 break; 253 default: 254 warnx("Unknown .netrc keyword %s", tokval); 255 break; 256 } 257 goto done; 258 } 259 done: 260 (void)fclose(cfile); 261 return (0); 262 bad: 263 (void)fclose(cfile); 264 return (-1); 265 } 266 267 static int 268 token() 269 { 270 char *cp; 271 int c; 272 struct toktab *t; 273 274 if (feof(cfile) || ferror(cfile)) 275 return (0); 276 while ((c = getc(cfile)) != EOF && 277 (c == '\n' || c == '\t' || c == ' ' || c == ',')) 278 continue; 279 if (c == EOF) 280 return (0); 281 cp = tokval; 282 if (c == '"') { 283 while ((c = getc(cfile)) != EOF && c != '"') { 284 if (c == '\\') 285 c = getc(cfile); 286 *cp++ = c; 287 } 288 } else { 289 *cp++ = c; 290 while ((c = getc(cfile)) != EOF 291 && c != '\n' && c != '\t' && c != ' ' && c != ',') { 292 if (c == '\\') 293 c = getc(cfile); 294 *cp++ = c; 295 } 296 } 297 *cp = 0; 298 if (tokval[0] == 0) 299 return (0); 300 for (t = toktab; t->tokstr; t++) 301 if (!strcmp(t->tokstr, tokval)) 302 return (t->tval); 303 return (ID); 304 } 305
Indexes created Tue Sep 23 07:09:52 GMT 2025