| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | Username handling
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| 4 | Copyright (C) Andrew Tridgell 1992-1998
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| 5 | Copyright (C) Jeremy Allison 1997-2001.
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| 6 | Copyright (C) Volker Lendecke 2006
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| 7 |
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| 8 | This program is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 3 of the License, or
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| 11 | (at your option) any later version.
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| 12 |
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| 13 | This program is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 | */
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| 21 |
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| 22 | #include "includes.h"
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| 23 |
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| 24 | /*******************************************************************
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| 25 | Map a username from a dos name to a unix name by looking in the username
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| 26 | map. Note that this modifies the name in place.
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| 27 | This is the main function that should be called *once* on
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| 28 | any incoming or new username - in order to canonicalize the name.
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| 29 | This is being done to de-couple the case conversions from the user mapping
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| 30 | function. Previously, the map_username was being called
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| 31 | every time Get_Pwnam_alloc was called.
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| 32 | Returns True if username was changed, false otherwise.
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| 33 | ********************************************************************/
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| 34 |
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| 35 | static char *last_from, *last_to;
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| 36 |
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| 37 | static const char *get_last_from(void)
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| 38 | {
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| 39 | if (!last_from) {
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| 40 | return "";
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| 41 | }
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| 42 | return last_from;
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| 43 | }
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| 44 |
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| 45 | static const char *get_last_to(void)
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| 46 | {
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| 47 | if (!last_to) {
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| 48 | return "";
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| 49 | }
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| 50 | return last_to;
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| 51 | }
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| 52 |
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| 53 | static bool set_last_from_to(const char *from, const char *to)
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| 54 | {
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| 55 | char *orig_from = last_from;
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| 56 | char *orig_to = last_to;
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| 57 |
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| 58 | last_from = SMB_STRDUP(from);
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| 59 | last_to = SMB_STRDUP(to);
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| 60 |
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| 61 | SAFE_FREE(orig_from);
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| 62 | SAFE_FREE(orig_to);
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| 63 |
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| 64 | if (!last_from || !last_to) {
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| 65 | SAFE_FREE(last_from);
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| 66 | SAFE_FREE(last_to);
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| 67 | return false;
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| 68 | }
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| 69 | return true;
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| 70 | }
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| 71 |
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| 72 | bool map_username(fstring user)
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| 73 | {
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| 74 | XFILE *f;
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| 75 | char *mapfile = lp_username_map();
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| 76 | char *s;
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| 77 | char buf[512];
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| 78 | bool mapped_user = False;
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| 79 | char *cmd = lp_username_map_script();
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| 80 |
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| 81 | if (!*user)
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| 82 | return false;
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| 83 |
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| 84 | if (strequal(user,get_last_to()))
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| 85 | return false;
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| 86 |
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| 87 | if (strequal(user,get_last_from())) {
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| 88 | DEBUG(3,("Mapped user %s to %s\n",user,get_last_to()));
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| 89 | fstrcpy(user,get_last_to());
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| 90 | return true;
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| 91 | }
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| 92 |
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| 93 | /* first try the username map script */
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| 94 |
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| 95 | if ( *cmd ) {
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| 96 | char **qlines;
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| 97 | char *command = NULL;
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| 98 | int numlines, ret, fd;
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| 99 |
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| 100 | command = talloc_asprintf(talloc_tos(),
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| 101 | "%s \"%s\"",
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| 102 | cmd,
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| 103 | user);
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| 104 | if (!command) {
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| 105 | return false;
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| 106 | }
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| 107 |
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| 108 | DEBUG(10,("Running [%s]\n", command));
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| 109 | ret = smbrun(command, &fd);
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| 110 | DEBUGADD(10,("returned [%d]\n", ret));
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| 111 |
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| 112 | if ( ret != 0 ) {
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| 113 | if (fd != -1)
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| 114 | close(fd);
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| 115 | return False;
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| 116 | }
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| 117 |
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| 118 | numlines = 0;
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| 119 | qlines = fd_lines_load(fd, &numlines,0);
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| 120 | DEBUGADD(10,("Lines returned = [%d]\n", numlines));
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| 121 | close(fd);
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| 122 |
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| 123 | /* should be either no lines or a single line with the mapped username */
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| 124 |
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| 125 | if (numlines && qlines) {
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| 126 | DEBUG(3,("Mapped user %s to %s\n", user, qlines[0] ));
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| 127 | fstrcpy( user, qlines[0] );
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| 128 | }
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| 129 |
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| 130 | file_lines_free(qlines);
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| 131 |
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| 132 | return numlines != 0;
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| 133 | }
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| 134 |
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| 135 | /* ok. let's try the mapfile */
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| 136 | if (!*mapfile)
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| 137 | return False;
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| 138 |
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| 139 | f = x_fopen(mapfile,O_RDONLY, 0);
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| 140 | if (!f) {
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| 141 | DEBUG(0,("can't open username map %s. Error %s\n",mapfile, strerror(errno) ));
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| 142 | return False;
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| 143 | }
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| 144 |
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| 145 | DEBUG(4,("Scanning username map %s\n",mapfile));
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| 146 |
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| 147 | while((s=fgets_slash(buf,sizeof(buf),f))!=NULL) {
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| 148 | char *unixname = s;
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| 149 | char *dosname = strchr_m(unixname,'=');
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| 150 | char **dosuserlist;
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| 151 | bool return_if_mapped = False;
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