ruserpass.c revision 1.14
1 /* $NetBSD: ruserpass.c,v 1.14 1997/07/20 09:46:01 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 1.14 1997/07/20 09:46:01 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 == 0) { 152 *aname = malloc((unsigned) 153 strlen(tokval) + 1); 154 (void)strcpy(*aname, tokval); 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 == 0) { 169 *apass = malloc((unsigned) strlen(tokval) + 1); 170 (void)strcpy(*apass, tokval); 171 } 172 break; 173 case ACCOUNT: 174 if (fstat(fileno(cfile), &stb) >= 0 175 && (stb.st_mode & 077) != 0) { 176 warnx("Error: .netrc file is readable by others."); 177 warnx("Remove account or make file unreadable by others."); 178 goto bad; 179 } 180 if (token() && *aacct == 0) { 181 *aacct = malloc((unsigned) strlen(tokval) + 1); 182 (void)strcpy(*aacct, tokval); 183 } 184 break; 185 case MACDEF: 186 if (proxy) { 187 (void)fclose(cfile); 188 return (0); 189 } 190 while ((c=getc(cfile)) != EOF) 191 if (c != ' ' && c != '\t') 192 break; 193 if (c == EOF || c == '\n') { 194 puts("Missing macdef name argument."); 195 goto bad; 196 } 197 if (macnum == 16) { 198 puts( 199 "Limit of 16 macros have already been defined."); 200 goto bad; 201 } 202 tmp = macros[macnum].mac_name; 203 *tmp++ = c; 204 for (i=0; i < 8 && (c=getc(cfile)) != EOF && 205 !isspace(c); ++i) { 206 *tmp++ = c; 207 } 208 if (c == EOF) { 209 puts( 210 "Macro definition missing null line terminator."); 211 goto bad; 212 } 213 *tmp = '\0'; 214 if (c != '\n') { 215 while ((c=getc(cfile)) != EOF && c != '\n'); 216 } 217 if (c == EOF) { 218 puts( 219 "Macro definition missing null line terminator."); 220 goto bad; 221 } 222 if (macnum == 0) { 223 macros[macnum].mac_start = macbuf; 224 } 225 else { 226 macros[macnum].mac_start = 227 macros[macnum-1].mac_end + 1; 228 } 229 tmp = macros[macnum].mac_start; 230 while (tmp != macbuf + 4096) { 231 if ((c=getc(cfile)) == EOF) { 232 puts( 233 "Macro definition missing null line terminator."); 234 goto bad; 235 } 236 *tmp = c; 237 if (*tmp == '\n') { 238 if (*(tmp-1) == '\0') { 239 macros[macnum++].mac_end = tmp - 1; 240 break; 241 } 242 *tmp = '\0'; 243 } 244 tmp++; 245 } 246 if (tmp == macbuf + 4096) { 247 puts("4K macro buffer exceeded."); 248 goto bad; 249 } 250 break; 251 default: 252 warnx("Unknown .netrc keyword %s", tokval); 253 break; 254 } 255 goto done; 256 } 257 done: 258 (void)fclose(cfile); 259 return (0); 260 bad: 261 (void)fclose(cfile); 262 return (-1); 263 } 264 265 static int 266 token() 267 { 268 char *cp; 269 int c; 270 struct toktab *t; 271 272 if (feof(cfile) || ferror(cfile)) 273 return (0); 274 while ((c = getc(cfile)) != EOF && 275 (c == '\n' || c == '\t' || c == ' ' || c == ',')) 276 continue; 277 if (c == EOF) 278 return (0); 279 cp = tokval; 280 if (c == '"') { 281 while ((c = getc(cfile)) != EOF && c != '"') { 282 if (c == '\\') 283 c = getc(cfile); 284 *cp++ = c; 285 } 286 } else { 287 *cp++ = c; 288 while ((c = getc(cfile)) != EOF 289 && c != '\n' && c != '\t' && c != ' ' && c != ',') { 290 if (c == '\\') 291 c = getc(cfile); 292 *cp++ = c; 293 } 294 } 295 *cp = 0; 296 if (tokval[0] == 0) 297 return (0); 298 for (t = toktab; t->tokstr; t++) 299 if (!strcmp(t->tokstr, tokval)) 300 return (t->tval); 301 return (ID); 302 } 303
Indexes created Tue Sep 23 07:09:52 GMT 2025