ruserpass.c revision 1.3
1 /* $NetBSD: ruserpass.c,v 1.3 1998/07/06 07:01:16 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 #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 1.3 1998/07/06 07:01:16 mrg 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())) switch(t) { 128 129 case DEFAULT: 130 usedefault = 1; 131 /* FALL THROUGH */ 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, tmp - host) == 0 && 147 tokval[tmp - host] == '\0') 148 goto match; 149 continue; 150 } 151 match: 152 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { 153 154 case LOGIN: 155 if (token()) 156 if (*aname == NULL) { 157 *aname = strdup(tokval); 158 if (*aname == NULL) 159 err(1, "can't strdup *aname"); 160 } else { 161 if (strcmp(*aname, tokval)) 162 goto next; 163 } 164 break; 165 case PASSWD: 166 if ((*aname == NULL || strcmp(*aname, "anonymous")) && 167 fstat(fileno(cfile), &stb) >= 0 && 168 (stb.st_mode & 077) != 0) { 169 warnx("Error: .netrc file is readable by others."); 170 warnx("Remove password or make file unreadable by others."); 171 goto bad; 172 } 173 if (token() && *apass == NULL) { 174 *apass = strdup(tokval); 175 if (*apass == NULL) 176 err(1, "can't strdup *apass"); 177 } 178 break; 179 case ACCOUNT: 180 if (fstat(fileno(cfile), &stb) >= 0 181 && (stb.st_mode & 077) != 0) { 182 warnx("Error: .netrc file is readable by others."); 183 warnx("Remove account or make file unreadable by others."); 184 goto bad; 185 } 186 break; 187 case MACDEF: 188 while ((c=getc(cfile)) != EOF) 189 if (c != ' ' && c != '\t') 190 break; 191 if (c == EOF || c == '\n') { 192 puts("Missing macdef name argument."); 193 goto bad; 194 } 195 if (macnum == 16) { 196 puts( 197 "Limit of 16 macros have already been defined."); 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 puts( 208 "Macro definition missing null line terminator."); 209 goto bad; 210 } 211 *tmp = '\0'; 212 if (c != '\n') { 213 while ((c=getc(cfile)) != EOF && c != '\n'); 214 } 215 if (c == EOF) { 216 puts( 217 "Macro definition missing null line terminator."); 218 goto bad; 219 } 220 if (macnum == 0) { 221 macros[macnum].mac_start = macbuf; 222 } 223 else { 224 macros[macnum].mac_start = 225 macros[macnum-1].mac_end + 1; 226 } 227 tmp = macros[macnum].mac_start; 228 while (tmp != macbuf + 4096) { 229 if ((c=getc(cfile)) == EOF) { 230 puts( 231 "Macro definition missing null line terminator."); 232 goto bad; 233 } 234 *tmp = c; 235 if (*tmp == '\n') { 236 if (*(tmp-1) == '\0') { 237 macros[macnum++].mac_end = tmp - 1; 238 break; 239 } 240 *tmp = '\0'; 241 } 242 tmp++; 243 } 244 if (tmp == macbuf + 4096) { 245 puts("4K macro buffer exceeded."); 246 goto bad; 247 } 248 break; 249 default: 250 warnx("Unknown .netrc keyword %s", tokval); 251 break; 252 } 253 goto done; 254 } 255 done: 256 (void)fclose(cfile); 257 return (0); 258 bad: 259 (void)fclose(cfile); 260 return (-1); 261 } 262 263 static int 264 token() 265 { 266 char *cp; 267 int c; 268 struct toktab *t; 269 270 if (feof(cfile) || ferror(cfile)) 271 return (0); 272 while ((c = getc(cfile)) != EOF && 273 (c == '\n' || c == '\t' || c == ' ' || c == ',')) 274 continue; 275 if (c == EOF) 276 return (0); 277 cp = tokval; 278 if (c == '"') { 279 while ((c = getc(cfile)) != EOF && c != '"') { 280 if (c == '\\') 281 c = getc(cfile); 282 *cp++ = c; 283 } 284 } else { 285 *cp++ = c; 286 while ((c = getc(cfile)) != EOF 287 && c != '\n' && c != '\t' && c != ' ' && c != ',') { 288 if (c == '\\') 289 c = getc(cfile); 290 *cp++ = c; 291 } 292 } 293 *cp = 0; 294 if (tokval[0] == 0) 295 return (0); 296 for (t = toktab; t->tokstr; t++) 297 if (!strcmp(t->tokstr, tokval)) 298 return (t->tval); 299 return (ID); 300 } 301
Indexes created Wed Sep 24 02:09:48 GMT 2025