ruserpass.c revision 1.5
1 /* $NetBSD: ruserpass.c,v 1.5 1999/05/04 17:12:21 christos 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 1.5 1999/05/04 17:12:21 christos Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/stat.h> 47 #include <sys/param.h> 48 49 #include <ctype.h> 50 #include <err.h> 51 #include <errno.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 57 struct macel { 58 char mac_name[9]; /* macro name */ 59 char *mac_start; /* start of macro in macbuf */ 60 char *mac_end; /* end of macro in macbuf */ 61 }; 62 63 static int token __P((void)); 64 static FILE *cfile; 65 static int macnum; /* number of defined macros */ 66 static struct macel macros[16]; 67 static char macbuf[4096]; 68 69 #define DEFAULT 1 70 #define LOGIN 2 71 #define PASSWD 3 72 #define ACCOUNT 4 73 #define MACDEF 5 74 #define ID 10 75 #define MACH 11 76 77 static char tokval[100]; 78 79 static struct toktab { 80 char *tokstr; 81 int tval; 82 } toktab[]= { 83 { "default", DEFAULT }, 84 { "login", LOGIN }, 85 { "password", PASSWD }, 86 { "passwd", PASSWD }, 87 { "account", ACCOUNT }, 88 { "machine", MACH }, 89 { "macdef", MACDEF }, 90 { NULL, 0 } 91 }; 92 93 int ruserpass __P((const char *, char **, char **)); 94 95 int 96 ruserpass(host, aname, apass) 97 const char *host; 98 char **aname, **apass; 99 { 100 char *hdir, buf[BUFSIZ], *tmp; 101 char myname[MAXHOSTNAMELEN + 1], *mydomain; 102 int t, i, c, usedefault = 0; 103 struct stat stb; 104 105 hdir = getenv("HOME"); 106 if (hdir == NULL) 107 hdir = "."; 108 if (strlen(hdir) + sizeof(".netrc") < sizeof(buf)) { 109 (void)snprintf(buf, sizeof buf, "%s/.netrc", hdir); 110 } else { 111 warnx("%s/.netrc: %s", hdir, strerror(ENAMETOOLONG)); 112 return (0); 113 } 114 cfile = fopen(buf, "r"); 115 if (cfile == NULL) { 116 if (errno != ENOENT) 117 warn("%s", buf); 118 return (0); 119 } 120 if (gethostname(myname, sizeof(myname)) < 0) 121 myname[0] = '\0'; 122 else 123 myname[sizeof(myname) - 1] = '\0'; 124 if ((mydomain = strchr(myname, '.')) == NULL) 125 mydomain = ""; 126 next: 127 while ((t = token()) != NULL) switch(t) { 128 129 case DEFAULT: 130 usedefault = 1; 131 /* FALLTHROUGH */ 132 133 case MACH: 134 if (!usedefault) { 135 if (token() != ID) 136 continue; 137 /* 138 * Allow match either for user's input host name 139 * or official hostname. Also allow match of 140 * incompletely-specified host in local domain. 141 */ 142 if (strcasecmp(host, tokval) == 0) 143 goto match; 144 if ((tmp = strchr(host, '.')) != NULL && 145 strcasecmp(tmp, mydomain) == 0 && 146 strncasecmp(host, tokval, 147 (size_t)(tmp - host)) == 0 && 148 tokval[tmp - host] == '\0') 149 goto match; 150 continue; 151 } 152 match: 153 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { 154 155 case LOGIN: 156 if (token()) { 157 if (*aname == NULL) { 158 *aname = strdup(tokval); 159 if (*aname == NULL) 160 err(1, "can't strdup *aname"); 161 } else { 162 if (strcmp(*aname, tokval)) 163 goto next; 164 } 165 } 166 break; 167 case PASSWD: 168 if ((*aname == NULL || strcmp(*aname, "anonymous")) && 169 fstat(fileno(cfile), &stb) >= 0 && 170 (stb.st_mode & 077) != 0) { 171 warnx("Error: .netrc file is readable by others."); 172 warnx("Remove password or make file unreadable by others."); 173 goto bad; 174 } 175 if (token() && *apass == NULL) { 176 *apass = strdup(tokval); 177 if (*apass == NULL) 178 err(1, "can't strdup *apass"); 179 } 180 break; 181 case ACCOUNT: 182 if (fstat(fileno(cfile), &stb) >= 0 183 && (stb.st_mode & 077) != 0) { 184 warnx("Error: .netrc file is readable by others."); 185 warnx("Remove account or make file unreadable by others."); 186 goto bad; 187 } 188 break; 189 case MACDEF: 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 14:10:03 GMT 2025