ruserpass.c revision 1.2
1 /* $NetBSD: ruserpass.c,v 1.2 1998/03/19 18:06:15 tv 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 1.2 1998/03/19 18:06:15 tv 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], *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 if ((mydomain = strchr(myname, '.')) == NULL) 123 mydomain = ""; 124 next: 125 while ((t = token())) switch(t) { 126 127 case DEFAULT: 128 usedefault = 1; 129 /* FALL THROUGH */ 130 131 case MACH: 132 if (!usedefault) { 133 if (token() != ID) 134 continue; 135 /* 136 * Allow match either for user's input host name 137 * or official hostname. Also allow match of 138 * incompletely-specified host in local domain. 139 */ 140 if (strcasecmp(host, tokval) == 0) 141 goto match; 142 if ((tmp = strchr(host, '.')) != NULL && 143 strcasecmp(tmp, mydomain) == 0 && 144 strncasecmp(host, tokval, tmp - host) == 0 && 145 tokval[tmp - host] == '\0') 146 goto match; 147 continue; 148 } 149 match: 150 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { 151 152 case LOGIN: 153 if (token()) 154 if (*aname == NULL) { 155 *aname = strdup(tokval); 156 if (*aname == NULL) 157 err(1, "can't strdup *aname"); 158 } else { 159 if (strcmp(*aname, tokval)) 160 goto next; 161 } 162 break; 163 case PASSWD: 164 if ((*aname == NULL || strcmp(*aname, "anonymous")) && 165 fstat(fileno(cfile), &stb) >= 0 && 166 (stb.st_mode & 077) != 0) { 167 warnx("Error: .netrc file is readable by others."); 168 warnx("Remove password or make file unreadable by others."); 169 goto bad; 170 } 171 if (token() && *apass == NULL) { 172 *apass = strdup(tokval); 173 if (*apass == NULL) 174 err(1, "can't strdup *apass"); 175 } 176 break; 177 case ACCOUNT: 178 if (fstat(fileno(cfile), &stb) >= 0 179 && (stb.st_mode & 077) != 0) { 180 warnx("Error: .netrc file is readable by others."); 181 warnx("Remove account or make file unreadable by others."); 182 goto bad; 183 } 184 break; 185 case MACDEF: 186 while ((c=getc(cfile)) != EOF) 187 if (c != ' ' && c != '\t') 188 break; 189 if (c == EOF || c == '\n') { 190 puts("Missing macdef name argument."); 191 goto bad; 192 } 193 if (macnum == 16) { 194 puts( 195 "Limit of 16 macros have already been defined."); 196 goto bad; 197 } 198 tmp = macros[macnum].mac_name; 199 *tmp++ = c; 200 for (i=0; i < 8 && (c=getc(cfile)) != EOF && 201 !isspace(c); ++i) { 202 *tmp++ = c; 203 } 204 if (c == EOF) { 205 puts( 206 "Macro definition missing null line terminator."); 207 goto bad; 208 } 209 *tmp = '\0'; 210 if (c != '\n') { 211 while ((c=getc(cfile)) != EOF && c != '\n'); 212 } 213 if (c == EOF) { 214 puts( 215 "Macro definition missing null line terminator."); 216 goto bad; 217 } 218 if (macnum == 0) { 219 macros[macnum].mac_start = macbuf; 220 } 221 else { 222 macros[macnum].mac_start = 223 macros[macnum-1].mac_end + 1; 224 } 225 tmp = macros[macnum].mac_start; 226 while (tmp != macbuf + 4096) { 227 if ((c=getc(cfile)) == EOF) { 228 puts( 229 "Macro definition missing null line terminator."); 230 goto bad; 231 } 232 *tmp = c; 233 if (*tmp == '\n') { 234 if (*(tmp-1) == '\0') { 235 macros[macnum++].mac_end = tmp - 1; 236 break; 237 } 238 *tmp = '\0'; 239 } 240 tmp++; 241 } 242 if (tmp == macbuf + 4096) { 243 puts("4K macro buffer exceeded."); 244 goto bad; 245 } 246 break; 247 default: 248 warnx("Unknown .netrc keyword %s", tokval); 249 break; 250 } 251 goto done; 252 } 253 done: 254 (void)fclose(cfile); 255 return (0); 256 bad: 257 (void)fclose(cfile); 258 return (-1); 259 } 260 261 static int 262 token() 263 { 264 char *cp; 265 int c; 266 struct toktab *t; 267 268 if (feof(cfile) || ferror(cfile)) 269 return (0); 270 while ((c = getc(cfile)) != EOF && 271 (c == '\n' || c == '\t' || c == ' ' || c == ',')) 272 continue; 273 if (c == EOF) 274 return (0); 275 cp = tokval; 276 if (c == '"') { 277 while ((c = getc(cfile)) != EOF && c != '"') { 278 if (c == '\\') 279 c = getc(cfile); 280 *cp++ = c; 281 } 282 } else { 283 *cp++ = c; 284 while ((c = getc(cfile)) != EOF 285 && c != '\n' && c != '\t' && c != ' ' && c != ',') { 286 if (c == '\\') 287 c = getc(cfile); 288 *cp++ = c; 289 } 290 } 291 *cp = 0; 292 if (tokval[0] == 0) 293 return (0); 294 for (t = toktab; t->tokstr; t++) 295 if (!strcmp(t->tokstr, tokval)) 296 return (t->tval); 297 return (ID); 298 } 299
Indexes created Tue Sep 23 14:10:03 GMT 2025