ruserpass.c revision 1.8
1 /* $NetBSD: ruserpass.c,v 1.8 1996/11/28 03:12:42 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 #ifndef lint 37 static char sccsid[] = "@(#)ruserpass.c 8.4 (Berkeley) 4/27/95"; 38 #endif /* not lint */ 39 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <errno.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 #include "ftp_var.h" 52 53 static int token __P((void)); 54 static FILE *cfile; 55 56 #define DEFAULT 1 57 #define LOGIN 2 58 #define PASSWD 3 59 #define ACCOUNT 4 60 #define MACDEF 5 61 #define ID 10 62 #define MACH 11 63 64 static char tokval[100]; 65 66 static struct toktab { 67 char *tokstr; 68 int tval; 69 } toktab[]= { 70 { "default", DEFAULT }, 71 { "login", LOGIN }, 72 { "password", PASSWD }, 73 { "passwd", PASSWD }, 74 { "account", ACCOUNT }, 75 { "machine", MACH }, 76 { "macdef", MACDEF }, 77 { NULL, 0 } 78 }; 79 80 int 81 ruserpass(host, aname, apass, aacct) 82 const char *host; 83 char **aname, **apass, **aacct; 84 { 85 char *hdir, buf[BUFSIZ], *tmp; 86 char myname[MAXHOSTNAMELEN], *mydomain; 87 int t, i, c, usedefault = 0; 88 struct stat stb; 89 90 hdir = getenv("HOME"); 91 if (hdir == NULL) 92 hdir = "."; 93 if (strlen(hdir) + sizeof(".netrc") < sizeof(buf)) { 94 (void) sprintf(buf, "%s/.netrc", hdir); 95 } else { 96 warnx("%s/.netrc: %s", hdir, strerror(ENAMETOOLONG)); 97 return (0); 98 } 99 cfile = fopen(buf, "r"); 100 if (cfile == NULL) { 101 if (errno != ENOENT) 102 warn("%s", buf); 103 return (0); 104 } 105 if (gethostname(myname, sizeof(myname)) < 0) 106 myname[0] = '\0'; 107 if ((mydomain = strchr(myname, '.')) == NULL) 108 mydomain = ""; 109 next: 110 while ((t = token())) switch(t) { 111 112 case DEFAULT: 113 usedefault = 1; 114 /* FALL THROUGH */ 115 116 case MACH: 117 if (!usedefault) { 118 if (token() != ID) 119 continue; 120 /* 121 * Allow match either for user's input host name 122 * or official hostname. Also allow match of 123 * incompletely-specified host in local domain. 124 */ 125 if (strcasecmp(host, tokval) == 0) 126 goto match; 127 if (strcasecmp(hostname, tokval) == 0) 128 goto match; 129 if ((tmp = strchr(hostname, '.')) != NULL && 130 strcasecmp(tmp, mydomain) == 0 && 131 strncasecmp(hostname, tokval, tmp-hostname) == 0 && 132 tokval[tmp - hostname] == '\0') 133 goto match; 134 if ((tmp = strchr(host, '.')) != NULL && 135 strcasecmp(tmp, mydomain) == 0 && 136 strncasecmp(host, tokval, tmp - host) == 0 && 137 tokval[tmp - host] == '\0') 138 goto match; 139 continue; 140 } 141 match: 142 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { 143 144 case LOGIN: 145 if (token()) 146 if (*aname == 0) { 147 *aname = malloc((unsigned) 148 strlen(tokval) + 1); 149 (void) strcpy(*aname, tokval); 150 } else { 151 if (strcmp(*aname, tokval)) 152 goto next; 153 } 154 break; 155 case PASSWD: 156 if ((*aname == NULL || strcmp(*aname, "anonymous")) && 157 fstat(fileno(cfile), &stb) >= 0 && 158 (stb.st_mode & 077) != 0) { 159 warnx("Error: .netrc file is readable by others."); 160 warnx("Remove password or make file unreadable by others."); 161 goto bad; 162 } 163 if (token() && *apass == 0) { 164 *apass = malloc((unsigned) strlen(tokval) + 1); 165 (void) strcpy(*apass, tokval); 166 } 167 break; 168 case ACCOUNT: 169 if (fstat(fileno(cfile), &stb) >= 0 170 && (stb.st_mode & 077) != 0) { 171 warnx("Error: .netrc file is readable by others."); 172 warnx("Remove account or make file unreadable by others."); 173 goto bad; 174 } 175 if (token() && *aacct == 0) { 176 *aacct = malloc((unsigned) strlen(tokval) + 1); 177 (void) strcpy(*aacct, tokval); 178 } 179 break; 180 case MACDEF: 181 if (proxy) { 182 (void) fclose(cfile); 183 return (0); 184 } 185 while ((c=getc(cfile)) != EOF && c == ' ' || c == '\t'); 186 if (c == EOF || c == '\n') { 187 printf("Missing macdef name argument.\n"); 188 goto bad; 189 } 190 if (macnum == 16) { 191 printf( 192 "Limit of 16 macros have already been defined\n"); 193 goto bad; 194 } 195 tmp = macros[macnum].mac_name; 196 *tmp++ = c; 197 for (i=0; i < 8 && (c=getc(cfile)) != EOF && 198 !isspace(c); ++i) { 199 *tmp++ = c; 200 } 201 if (c == EOF) { 202 printf( 203 "Macro definition missing null line terminator.\n"); 204 goto bad; 205 } 206 *tmp = '\0'; 207 if (c != '\n') { 208 while ((c=getc(cfile)) != EOF && c != '\n'); 209 } 210 if (c == EOF) { 211 printf( 212 "Macro definition missing null line terminator.\n"); 213 goto bad; 214 } 215 if (macnum == 0) { 216 macros[macnum].mac_start = macbuf; 217 } 218 else { 219 macros[macnum].mac_start = macros[macnum-1].mac_end + 1; 220 } 221 tmp = macros[macnum].mac_start; 222 while (tmp != macbuf + 4096) { 223 if ((c=getc(cfile)) == EOF) { 224 printf( 225 "Macro definition missing null line terminator.\n"); 226 goto bad; 227 } 228 *tmp = c; 229 if (*tmp == '\n') { 230 if (*(tmp-1) == '\0') { 231 macros[macnum++].mac_end = tmp - 1; 232 break; 233 } 234 *tmp = '\0'; 235 } 236 tmp++; 237 } 238 if (tmp == macbuf + 4096) { 239 printf("4K macro buffer exceeded\n"); 240 goto bad; 241 } 242 break; 243 default: 244 warnx("Unknown .netrc keyword %s", tokval); 245 break; 246 } 247 goto done; 248 } 249 done: 250 (void) fclose(cfile); 251 return (0); 252 bad: 253 (void) fclose(cfile); 254 return (-1); 255 } 256 257 static int 258 token() 259 { 260 char *cp; 261 int c; 262 struct toktab *t; 263 264 if (feof(cfile) || ferror(cfile)) 265 return (0); 266 while ((c = getc(cfile)) != EOF && 267 (c == '\n' || c == '\t' || c == ' ' || c == ',')) 268 continue; 269 if (c == EOF) 270 return (0); 271 cp = tokval; 272 if (c == '"') { 273 while ((c = getc(cfile)) != EOF && c != '"') { 274 if (c == '\\') 275 c = getc(cfile); 276 *cp++ = c; 277 } 278 } else { 279 *cp++ = c; 280 while ((c = getc(cfile)) != EOF 281 && c != '\n' && c != '\t' && c != ' ' && c != ',') { 282 if (c == '\\') 283 c = getc(cfile); 284 *cp++ = c; 285 } 286 } 287 *cp = 0; 288 if (tokval[0] == 0) 289 return (0); 290 for (t = toktab; t->tokstr; t++) 291 if (!strcmp(t->tokstr, tokval)) 292 return (t->tval); 293 return (ID); 294 } 295
Indexes created Wed Sep 24 05:09:52 GMT 2025