From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- source3/smbd/mangle.c | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 source3/smbd/mangle.c (limited to 'source3/smbd/mangle.c') diff --git a/source3/smbd/mangle.c b/source3/smbd/mangle.c new file mode 100644 index 0000000..dbb187a --- /dev/null +++ b/source3/smbd/mangle.c @@ -0,0 +1,153 @@ +/* + Unix SMB/CIFS implementation. + Name mangling interface + Copyright (C) Andrew Tridgell 2002 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +#include "includes.h" +#include "smbd/smbd.h" +#include "smbd/globals.h" +#include "mangle.h" + +/* this allows us to add more mangling backends */ +static const struct { + const char *name; + const struct mangle_fns *(*init_fn)(void); +} mangle_backends[] = { + { "hash", mangle_hash_init }, + { "hash2", mangle_hash2_init }, + { "posix", posix_mangle_init }, + /*{ "tdb", mangle_tdb_init }, */ + { NULL, NULL } +}; + +/* + initialise the mangling subsystem +*/ +static void mangle_init(void) +{ + int i; + const char *method; + + if (mangle_fns) + return; + + method = lp_mangling_method(); + + /* find the first mangling method that manages to initialise and + matches the "mangling method" parameter */ + for (i=0; mangle_backends[i].name && !mangle_fns; i++) { + if (!method || !*method || strcmp(method, mangle_backends[i].name) == 0) { + mangle_fns = mangle_backends[i].init_fn(); + } + } + + if (!mangle_fns) { + DEBUG(0,("Failed to initialise mangling system '%s'\n", method)); + exit_server("mangling init failed"); + } +} + + +/* + reset the cache. This is called when smb.conf has been reloaded +*/ +void mangle_reset_cache(void) +{ + mangle_init(); + mangle_fns->reset(); +} + +void mangle_change_to_posix(void) +{ + mangle_fns = NULL; + lp_set_mangling_method("posix"); + mangle_reset_cache(); +} + +/* + see if a filename has come out of our mangling code +*/ +bool mangle_is_mangled(const char *s, const struct share_params *p) +{ + return mangle_fns->is_mangled(s, p); +} + +/* + see if a filename matches the rules of a 8.3 filename +*/ +bool mangle_is_8_3(const char *fname, bool check_case, + const struct share_params *p) +{ + return mangle_fns->is_8_3(fname, check_case, False, p); +} + +bool mangle_is_8_3_wildcards(const char *fname, bool check_case, + const struct share_params *p) +{ + return mangle_fns->is_8_3(fname, check_case, True, p); +} + +bool mangle_must_mangle(const char *fname, + const struct share_params *p) +{ + if (lp_mangled_names(p) == MANGLED_NAMES_NO) { + return False; + } + return mangle_fns->must_mangle(fname, p); +} + +/* + try to reverse map a 8.3 name to the original filename. This doesn't have to + always succeed, as the directory handling code in smbd will scan the directory + looking for a matching name if it doesn't. It should succeed most of the time + or there will be a huge performance penalty +*/ +bool mangle_lookup_name_from_8_3(TALLOC_CTX *ctx, + const char *in, + char **out, /* talloced on the given context. */ + const struct share_params *p) +{ + return mangle_fns->lookup_name_from_8_3(ctx, in, out, p); +} + +/* + mangle a long filename to a 8.3 name. + Return True if we did mangle the name (ie. out is filled in). + False on error. + JRA. + */ + +bool name_to_8_3(const char *in, + char out[13], + bool cache83, + const struct share_params *p) +{ + memset(out,'\0',13); + + /* name mangling can be disabled for speed, in which case + we just truncate the string */ + if (lp_mangled_names(p) == MANGLED_NAMES_NO) { + strlcpy(out, in, 13); + return True; + } + + return mangle_fns->name_to_8_3(in, + out, + cache83, + lp_default_case(p->service), + p); +} -- cgit v1.2.3