ruserpass.c revision 1.13
1 /* $NetBSD: ruserpass.c,v 1.13 1997/04/01 14:20:34 mrg 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 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)ruserpass.c 8.4 (Berkeley) 4/27/95"; 39 #else 40 static char rcsid[] = "$NetBSD: ruserpass.c,v 1.13 1997/04/01 14:20:34 mrg Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <sys/stat.h> 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #include "ftp_var.h" 56 57 static int token __P((void)); 58 static FILE *cfile; 59 60 #define DEFAULT 1 61 #define LOGIN 2 62 #define PASSWD 3 63 #define ACCOUNT 4 64 #define MACDEF 5 65 #define ID 10 66 #define MACH 11 67 68 static char tokval[100]; 69 70 static struct toktab { 71 char *tokstr; 72 int tval; 73 } toktab[]= { 74 { "default", DEFAULT }, 75 { "login", LOGIN }, 76 { "password", PASSWD }, 77 { "passwd", PASSWD }, 78 { "account", ACCOUNT }, 79 { "machine", MACH }, 80 { "macdef", MACDEF }, 81 { NULL, 0 } 82 }; 83 84 int 85 ruserpass(host, aname, apass, aacct) 86 const char *host; 87 char **aname, **apass, **aacct; 88 { 89 char *hdir, buf[BUFSIZ], *tmp; 90 char myname[MAXHOSTNAMELEN], *mydomain; 91 int t, i, c, usedefault = 0; 92 struct stat stb; 93 94 hdir = getenv("HOME"); 95 if (hdir == NULL) 96 hdir = "."; 97 if (strlen(hdir) + sizeof(".netrc") < sizeof(buf)) { 98 (void)snprintf(buf, sizeof buf, "%s/.netrc", hdir); 99 } else { 100 warnx("%s/.netrc: %s", hdir, strerror(ENAMETOOLONG)); 101 return (0); 102 } 103 cfile = fopen(buf, "r"); 104 if (cfile == NULL) { 105 if (errno != ENOENT) 106 warn("%s", buf); 107 return (0); 108 } 109 if (gethostname(myname, sizeof(myname)) < 0) 110 myname[0] = '\0'; 111 if ((mydomain = strchr(myname, '.')) == NULL) 112 mydomain = ""; 113 next: 114 while ((t = token())) switch(t) { 115 116 case DEFAULT: 117 usedefault = 1; 118 /* FALL THROUGH */ 119 120 case MACH: 121 if (!usedefault) { 122 if (token() != ID) 123 continue; 124 /* 125 * Allow match either for user's input host name 126 * or official hostname. Also allow match of 127 * incompletely-specified host in local domain. 128 */ 129 if (strcasecmp(host, tokval) == 0) 130 goto match; 131 if (strcasecmp(hostname, tokval) == 0) 132 goto match; 133 if ((tmp = strchr(hostname, '.')) != NULL && 134 strcasecmp(tmp, mydomain) == 0 && 135 strncasecmp(hostname, tokval, tmp-hostname) == 0 && 136 tokval[tmp - hostname] == '\0') 137 goto match; 138 if ((tmp = strchr(host, '.')) != NULL && 139 strcasecmp(tmp, mydomain) == 0 && 140 strncasecmp(host, tokval, tmp - host) == 0 && 141 tokval[tmp - host] == '\0') 142 goto match; 143 continue; 144 } 145 match: 146 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { 147 148 case LOGIN: 149 if (token()) 150 if (*aname == 0) { 151 *aname = malloc((unsigned) 152 strlen(tokval) + 1); 153 (void)strcpy(*aname, tokval); 154 } else { 155 if (strcmp(*aname, tokval)) 156 goto next; 157 } 158 break; 159 case PASSWD: 160 if ((*aname == NULL || strcmp(*aname, "anonymous")) && 161 fstat(fileno(cfile), &stb) >= 0 && 162 (stb.st_mode & 077) != 0) { 163 warnx("Error: .netrc file is readable by others."); 164 warnx("Remove password or make file unreadable by others."); 165 goto bad; 166 } 167 if (token() && *apass == 0) { 168 *apass = malloc((unsigned) strlen(tokval) + 1); 169 (void)strcpy(*apass, tokval); 170 } 171 break; 172 case ACCOUNT: 173 if (fstat(fileno(cfile), &stb) >= 0 174 && (stb.st_mode & 077) != 0) { 175 warnx("Error: .netrc file is readable by others."); 176 warnx("Remove account or make file unreadable by others."); 177 goto bad; 178 } 179 if (token() && *aacct == 0) { 180 *aacct = malloc((unsigned) strlen(tokval) + 1); 181 (void)strcpy(*aacct, tokval); 182 } 183 break; 184 case MACDEF: 185 if (proxy) { 186 (void)fclose(cfile); 187 return (0); 188 } 189 while ((c=getc(cfile)) != EOF) 190 if (c != ' ' && c != '\t') 191 break; 192 if (c == EOF || c == '\n') { 193 puts("Missing macdef name argument."); 194 goto bad; 195 } 196 if (macnum == 16) { 197 puts( 198 "Limit of 16 macros have already been defined."); 199 goto bad; 200 } 201 tmp = macros[macnum].mac_name; 202 *tmp++ = c; 203 for (i=0; i < 8 && (c=getc(cfile)) != EOF && 204 !isspace(c); ++i) { 205 *tmp++ = c; 206 } 207 if (c == EOF) { 208 puts( 209 "Macro definition missing null line terminator."); 210 goto bad; 211 } 212 *tmp = '\0'; 213 if (c != '\n') { 214 while ((c=getc(cfile)) != EOF && c != '\n'); 215 } 216 if (c == EOF) { 217 puts( 218 "Macro definition missing null line terminator."); 219 goto bad; 220 } 221 if (macnum == 0) { 222 macros[macnum].mac_start = macbuf; 223 } 224 else { 225 macros[macnum].mac_start = 226 macros[macnum-1].mac_end + 1; 227 } 228 tmp = macros[macnum].mac_start; 229 while (tmp != macbuf + 4096) { 230 if ((c=getc(cfile)) == EOF) { 231 puts( 232 "Macro definition missing null line terminator."); 233 goto bad; 234 } 235 *tmp = c; 236 if (*tmp == '\n') { 237 if (*(tmp-1) == '\0') { 238 macros[macnum++].mac_end = tmp - 1; 239 break; 240 } 241 *tmp = '\0'; 242 } 243 tmp++; 244 } 245 if (tmp == macbuf + 4096) { 246 puts("4K macro buffer exceeded."); 247 goto bad; 248 } 249 break; 250 default: 251 warnx("Unknown .netrc keyword %s", tokval); 252 break; 253 } 254 goto done; 255 } 256 done: 257 (void)fclose(cfile); 258 return (0); 259 bad: 260 (void)fclose(cfile); 261 return (-1); 262 } 263 264 static int 265 token() 266 { 267 char *cp; 268 int c; 269 struct toktab *t; 270 271 if (feof(cfile) || ferror(cfile)) 272 return (0); 273 while ((c = getc(cfile)) != EOF && 274 (c == '\n' || c == '\t' || c == ' ' || c == ',')) 275 continue; 276 if (c == EOF) 277 return (0); 278 cp = tokval; 279 if (c == '"') { 280 while ((c = getc(cfile)) != EOF && c != '"') { 281 if (c == '\\') 282 c = getc(cfile); 283 *cp++ = c; 284 } 285 } else { 286 *cp++ = c; 287 while ((c = getc(cfile)) != EOF 288 && c != '\n' && c != '\t' && c != ' ' && c != ',') { 289 if (c == '\\') 290 c = getc(cfile); 291 *cp++ = c; 292 } 293 } 294 *cp = 0; 295 if (tokval[0] == 0) 296 return (0); 297 for (t = toktab; t->tokstr; t++) 298 if (!strcmp(t->tokstr, tokval)) 299 return (t->tval); 300 return (ID); 301 } 302
Indexes created Wed Sep 24 15:09:51 GMT 2025