/* $OpenBSD: ruserpass.c,v 1.18 2004/07/20 03:50:26 deraadt Exp $ */ /* $NetBSD: ruserpass.c,v 1.14 1997/07/20 09:46:01 lukem Exp $ */ /* * Copyright (c) 1985, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint #if 0 static char sccsid[] = "@(#)ruserpass.c 8.4 (Berkeley) 4/27/95"; #else #ifndef SMALL static char rcsid[] = "$OpenBSD: ruserpass.c,v 1.18 2004/07/20 03:50:26 deraadt Exp $"; #endif /* SMALL */ #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include "ftp_var.h" static int token(void); static FILE *cfile; #define DEFAULT 1 #define LOGIN 2 #define PASSWD 3 #define ACCOUNT 4 #define MACDEF 5 #define ID 10 #define MACH 11 static char tokval[100]; static struct toktab { char *tokstr; int tval; } toktab[]= { { "default", DEFAULT }, { "login", LOGIN }, { "password", PASSWD }, { "passwd", PASSWD }, { "account", ACCOUNT }, { "machine", MACH }, { "macdef", MACDEF }, { NULL, 0 } }; int ruserpass(const char *host, char **aname, char **apass, char **aacct) { char *hdir, buf[BUFSIZ], *tmp; char myname[MAXHOSTNAMELEN], *mydomain; int t, i, c, usedefault = 0; struct stat stb; hdir = getenv("HOME"); if (hdir == NULL || *hdir == '\0') return (0); if (strlen(hdir) + sizeof(".netrc") < sizeof(buf)) { (void)snprintf(buf, sizeof buf, "%s/.netrc", hdir); } else { warnx("%s/.netrc: %s", hdir, strerror(ENAMETOOLONG)); return (0); } cfile = fopen(buf, "r"); if (cfile == NULL) { if (errno != ENOENT) warn("%s", buf); return (0); } if (gethostname(myname, sizeof(myname)) < 0) myname[0] = '\0'; if ((mydomain = strchr(myname, '.')) == NULL) mydomain = ""; next: while ((t = token())) switch(t) { case DEFAULT: usedefault = 1; /* FALL THROUGH */ case MACH: if (!usedefault) { if (token() != ID) continue; /* * Allow match either for user's input host name * or official hostname. Also allow match of * incompletely-specified host in local domain. */ if (strcasecmp(host, tokval) == 0) goto match; if (strcasecmp(hostname, tokval) == 0) goto match; if ((tmp = strchr(hostname, '.')) != NULL && strcasecmp(tmp, mydomain) == 0 && strncasecmp(hostname, tokval, (size_t)(tmp - hostname)) == 0 && tokval[tmp - hostname] == '\0') goto match; if ((tmp = strchr(host, '.')) != NULL && strcasecmp(tmp, mydomain) == 0 && strncasecmp(host, tokval, (size_t)(tmp - host)) == 0 && tokval[tmp - host] == '\0') goto match; continue; } match: while ((t = token()) && t != MACH && t != DEFAULT) switch(t) { case LOGIN: if (token()) { if (*aname == 0) *aname = strdup(tokval); else { if (strcmp(*aname, tokval)) goto next; } } break; case PASSWD: if ((*aname == NULL || strcmp(*aname, "anonymous")) && fstat(fileno(cfile), &stb) >= 0 && (stb.st_mode & 077) != 0) { warnx("Error: .netrc file is readable by others."); warnx("Remove password or make file unreadable by others."); goto bad; } if (token() && *apass == 0) *apass = strdup(tokval); break; case ACCOUNT: if (fstat(fileno(cfile), &stb) >= 0 && (stb.st_mode & 077) != 0) { warnx("Error: .netrc file is readable by others."); warnx("Remove account or make file unreadable by others."); goto bad; } if (token() && *aacct == 0) *aacct = strdup(tokval); break; case MACDEF: if (proxy) { (void)fclose(cfile); return (0); } while ((c = fgetc(cfile)) != EOF) if (c != ' ' && c != '\t') break; if (c == EOF || c == '\n') { fputs("Missing macdef name argument.\n", ttyout); goto bad; } if (macnum == 16) { fputs( "Limit of 16 macros have already been defined.\n", ttyout); goto bad; } tmp = macros[macnum].mac_name; *tmp++ = c; for (i=0; i < 8 && (c = fgetc(cfile)) != EOF && !isspace(c); ++i) { *tmp++ = c; } if (c == EOF) { fputs( "Macro definition missing null line terminator.\n", ttyout); goto bad; } *tmp = '\0'; if (c != '\n') { while ((c = fgetc(cfile)) != EOF && c != '\n'); } if (c == EOF) { fputs( "Macro definition missing null line terminator.\n", ttyout); goto bad; } if (macnum == 0) { macros[macnum].mac_start = macbuf; } else { macros[macnum].mac_start = macros[macnum-1].mac_end + 1; } tmp = macros[macnum].mac_start; while (tmp != macbuf + 4096) { if ((c = fgetc(cfile)) == EOF) { fputs( "Macro definition missing null line terminator.\n", ttyout); goto bad; } *tmp = c; if (*tmp == '\n') { if (*(tmp-1) == '\0') { macros[macnum++].mac_end = tmp - 1; break; } *tmp = '\0'; } tmp++; } if (tmp == macbuf + 4096) { fputs("4K macro buffer exceeded.\n", ttyout); goto bad; } break; default: warnx("Unknown .netrc keyword %s", tokval); break; } goto done; } done: (void)fclose(cfile); return (0); bad: (void)fclose(cfile); return (-1); } static int token(void) { char *cp; int c; struct toktab *t; if (feof(cfile) || ferror(cfile)) return (0); while ((c = fgetc(cfile)) != EOF && (c == '\n' || c == '\t' || c == ' ' || c == ',')) continue; if (c == EOF) return (0); cp = tokval; if (c == '"') { while ((c = fgetc(cfile)) != EOF && c != '"') { if (c == '\\') c = fgetc(cfile); *cp++ = c; } } else { *cp++ = c; while ((c = fgetc(cfile)) != EOF && c != '\n' && c != '\t' && c != ' ' && c != ',') { if (c == '\\') c = fgetc(cfile); *cp++ = c; } } *cp = 0; if (tokval[0] == 0) return (0); for (t = toktab; t->tokstr; t++) if (!strcmp(t->tokstr, tokval)) return (t->tval); return (ID); }