ruserpass.c revision 1.25
1 /* $NetBSD: ruserpass.c,v 1.25 1999/10/24 12:31:41 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 1.25 1999/10/24 12:31:41 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 __P((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(host, aname, apass, aacct) 88 const char *host; 89 const char **aname, **apass, **aacct; 90 { 91 char *hdir, buf[BUFSIZ], *tmp; 92 char myname[MAXHOSTNAMELEN + 1], *mydomain; 93 int t, i, c, usedefault = 0; 94 struct stat stb; 95 96 hdir = getenv("HOME"); 97 if (hdir == NULL) 98 hdir = "."; 99 if (strlcpy(buf, hdir, sizeof(buf)) >= sizeof(buf) || 100 strlcat(buf, "/.netrc", sizeof(buf)) >= sizeof(buf)) { 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 myname[sizeof(myname) - 1] = '\0'; 113 if ((mydomain = strchr(myname, '.')) == NULL) 114 mydomain = ""; 115 next: 116 while ((t = token())) switch(t) { 117 118 case DEFAULT: 119 usedefault = 1; 120 /* FALL THROUGH */ 121 122 case MACH: 123 if (!usedefault) { 124 if (token() != ID) 125 continue; 126 /* 127 * Allow match either for user's input host name 128 * or official hostname. Also allow match of 129 * incompletely-specified host in local domain. 130 */ 131 if (strcasecmp(host, tokval) == 0) 132 goto match; 133 if (strcasecmp(hostname, tokval) == 0) 134 goto match; 135 if ((tmp = strchr(hostname, '.')) != NULL && 136 strcasecmp(tmp, mydomain) == 0 && 137 strncasecmp(hostname, tokval, tmp-hostname) == 0 && 138 tokval[tmp - hostname] == '\0') 139 goto match; 140 if ((tmp = strchr(host, '.')) != NULL && 141 strcasecmp(tmp, mydomain) == 0 && 142 strncasecmp(host, tokval, tmp - host) == 0 && 143 tokval[tmp - host] == '\0') 144 goto match; 145 continue; 146 } 147 match: 148 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { 149 150 case LOGIN: 151 if (token()) { 152 if (*aname == NULL) 153 *aname = xstrdup(tokval); 154 else { 155 if (strcmp(*aname, tokval)) 156 goto next; 157 } 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 = xstrdup(tokval); 170 break; 171 case ACCOUNT: 172 if (fstat(fileno(cfile), &stb) >= 0 173 && (stb.st_mode & 077) != 0) { 174 warnx("Error: .netrc file is readable by others."); 175 warnx("Remove account or make file unreadable by others."); 176 goto bad; 177 } 178 if (token() && *aacct == NULL) 179 *aacct = xstrdup(tokval); 180 break; 181 case MACDEF: 182 if (proxy) { 183 (void)fclose(cfile); 184 return (0); 185 } 186 while ((c = getc(cfile)) != EOF) 187 if (c != ' ' && c != '\t') 188 break; 189 if (c == EOF || c == '\n') { 190 fputs("Missing macdef name argument.\n", 191 ttyout); 192 goto bad; 193 } 194 if (macnum == 16) { 195 fputs( 196 "Limit of 16 macros have already been defined.\n", 197 ttyout); 198 goto bad; 199 } 200 tmp = macros[macnum].mac_name; 201 *tmp++ = c; 202 for (i = 0; i < 8 && (c = getc(cfile)) != EOF && 203 !isspace(c); ++i) { 204 *tmp++ = c; 205 } 206 if (c == EOF) { 207 fputs( 208 "Macro definition missing null line terminator.\n", 209 ttyout); 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 fputs( 218 "Macro definition missing null line terminator.\n", 219 ttyout); 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 fputs( 233 "Macro definition missing null line terminator.\n", 234 ttyout); 235 goto bad; 236 } 237 *tmp = c; 238 if (*tmp == '\n') { 239 if (*(tmp-1) == '\0') { 240 macros[macnum++].mac_end = tmp - 1; 241 break; 242 } 243 *tmp = '\0'; 244 } 245 tmp++; 246 } 247 if (tmp == macbuf + 4096) { 248 fputs("4K macro buffer exceeded.\n", 249 ttyout); 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 Thu Sep 25 16:09:42 GMT 2025