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|
/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-2001
Copyright (C) Simo Sorce 2001
Copyright (C) Jeremy Allison 2005
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 <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#ifndef MAXUNI
#define MAXUNI 1024
#endif
/* these 3 tables define the unicode case handling. They are loaded
at startup either via mmap() or read() from the lib directory */
static smb_ucs2_t *upcase_table;
static smb_ucs2_t *lowcase_table;
static uint8 *valid_table;
static bool upcase_table_use_unmap;
static bool lowcase_table_use_unmap;
static bool valid_table_use_unmap;
static bool initialized;
/**
* Destroy global objects allocated by load_case_tables()
**/
void gfree_case_tables(void)
{
if ( upcase_table ) {
if ( upcase_table_use_unmap )
unmap_file(upcase_table, 0x20000);
else
SAFE_FREE(upcase_table);
}
if ( lowcase_table ) {
if ( lowcase_table_use_unmap )
unmap_file(lowcase_table, 0x20000);
else
SAFE_FREE(lowcase_table);
}
if ( valid_table ) {
if ( valid_table_use_unmap )
unmap_file(valid_table, 0x10000);
else
SAFE_FREE(valid_table);
}
initialized = false;
}
/**
* Load or generate the case handling tables.
*
* The case tables are defined in UCS2 and don't depend on any
* configured parameters, so they never need to be reloaded.
**/
void load_case_tables(void)
{
char *old_locale = NULL, *saved_locale = NULL;
int i;
TALLOC_CTX *frame = NULL;
if (initialized) {
return;
}
initialized = true;
frame = talloc_stackframe();
upcase_table = (smb_ucs2_t *)map_file(data_path("upcase.dat"),
0x20000);
upcase_table_use_unmap = ( upcase_table != NULL );
lowcase_table = (smb_ucs2_t *)map_file(data_path("lowcase.dat"),
0x20000);
lowcase_table_use_unmap = ( lowcase_table != NULL );
#ifdef HAVE_SETLOCALE
/* Get the name of the current locale. */
old_locale = setlocale(LC_ALL, NULL);
if (old_locale) {
/* Save it as it is in static storage. */
saved_locale = SMB_STRDUP(old_locale);
}
/* We set back the locale to C to get ASCII-compatible toupper/lower functions. */
setlocale(LC_ALL, "C");
#endif
/* we would like Samba to limp along even if these tables are
not available */
if (!upcase_table) {
DEBUG(1,("creating lame upcase table\n"));
upcase_table = (smb_ucs2_t *)SMB_MALLOC(0x20000);
for (i=0;i<0x10000;i++) {
smb_ucs2_t v;
SSVAL(&v, 0, i);
upcase_table[v] = i;
}
for (i=0;i<256;i++) {
smb_ucs2_t v;
SSVAL(&v, 0, UCS2_CHAR(i));
upcase_table[v] = UCS2_CHAR(islower(i)?toupper(i):i);
}
}
if (!lowcase_table) {
DEBUG(1,("creating lame lowcase table\n"));
lowcase_table = (smb_ucs2_t *)SMB_MALLOC(0x20000);
for (i=0;i<0x10000;i++) {
smb_ucs2_t v;
SSVAL(&v, 0, i);
lowcase_table[v] = i;
}
for (i=0;i<256;i++) {
smb_ucs2_t v;
SSVAL(&v, 0, UCS2_CHAR(i));
lowcase_table[v] = UCS2_CHAR(isupper(i)?tolower(i):i);
}
}
#ifdef HAVE_SETLOCALE
/* Restore the old locale. */
if (saved_locale) {
setlocale (LC_ALL, saved_locale);
SAFE_FREE(saved_locale);
}
#endif
TALLOC_FREE(frame);
}
static int check_dos_char_slowly(smb_ucs2_t c)
{
char buf[10];
smb_ucs2_t c2 = 0;
int len1, len2;
len1 = convert_string(CH_UTF16LE, CH_DOS, &c, 2, buf, sizeof(buf),False);
if (len1 == 0) {
return 0;
}
len2 = convert_string(CH_DOS, CH_UTF16LE, buf, len1, &c2, 2,False);
if (len2 != 2) {
return 0;
}
return (c == c2);
}
/**
* Load the valid character map table from <tt>valid.dat</tt> or
* create from the configured codepage.
*
* This function is called whenever the configuration is reloaded.
* However, the valid character table is not changed if it's loaded
* from a file, because we can't unmap files.
**/
void init_valid_table(void)
{
static int mapped_file;
int i;
const char *allowed = ".!#$%&'()_-@^`~";
uint8 *valid_file;
if (mapped_file) {
/* Can't unmap files, so stick with what we have */
return;
}
valid_file = (uint8 *)map_file(data_path("valid.dat"), 0x10000);
if (valid_file) {
valid_table = valid_file;
mapped_file = 1;
valid_table_use_unmap = True;
return;
}
/* Otherwise, we're using a dynamically created valid_table.
* It might need to be regenerated if the code page changed.
* We know that we're not using a mapped file, so we can
* free() the old one. */
SAFE_FREE(valid_table);
/* use free rather than unmap */
valid_table_use_unmap = False;
DEBUG(2,("creating default valid table\n"));
valid_table = (uint8 *)SMB_MALLOC(0x10000);
SMB_ASSERT(valid_table != NULL);
for (i=0;i<128;i++) {
valid_table[i] = isalnum(i) || strchr(allowed,i);
}
lazy_initialize_conv();
for (;i<0x10000;i++) {
smb_ucs2_t c;
SSVAL(&c, 0, i);
valid_table[i] = check_dos_char_slowly(c);
}
}
/*******************************************************************
Write a string in (little-endian) unicode format. src is in
the current DOS codepage. len is the length in bytes of the
string pointed to by dst.
if null_terminate is True then null terminate the packet (adds 2 bytes)
the return value is the length in bytes consumed by the string, including the
null termination if applied
********************************************************************/
size_t dos_PutUniCode(char *dst,const char *src, size_t len, bool null_terminate)
{
int flags = null_terminate ? STR_UNICODE|STR_NOALIGN|STR_TERMINATE
: STR_UNICODE|STR_NOALIGN;
return push_ucs2(NULL, dst, src, len, flags);
}
/*******************************************************************
Skip past a unicode string, but not more than len. Always move
past a terminating zero if found.
********************************************************************/
char *skip_unibuf(char *src, size_t len)
{
char *srcend = src + len;
while (src < srcend && SVAL(src,0)) {
src += 2;
}
if(!SVAL(src,0)) {
src += 2;
}
return src;
}
/* Copy a string from little-endian or big-endian unicode source (depending
* on flags) to internal samba format destination
*/
int rpcstr_pull(char* dest, void *src, int dest_len, int src_len, int flags)
{
if (!src) {
dest[0] = 0;
return 0;
}
if(dest_len==-1) {
dest_len=MAXUNI-3;
}
return pull_ucs2(NULL, dest, src, dest_len, src_len, flags|STR_UNICODE|STR_NOALIGN);
}
/* Copy a string from little-endian or big-endian unicode source (depending
* on flags) to internal samba format destination. Allocates on talloc ctx.
*/
int rpcstr_pull_talloc(TALLOC_CTX *ctx,
char **dest,
void *src,
int src_len,
int flags)
{
return pull_ucs2_base_talloc(ctx,
NULL,
dest,
src,
src_len,
flags|STR_UNICODE|STR_NOALIGN);
}
/* Converts a string from internal samba format to unicode
*/
int rpcstr_push(void *dest, const char *src, size_t dest_len, int flags)
{
return push_ucs2(NULL, dest, src, dest_len, flags|STR_UNICODE|STR_NOALIGN);
}
/* Converts a string from internal samba format to unicode. Always terminates.
* Actually just a wrapper round push_ucs2_talloc().
*/
int rpcstr_push_talloc(TALLOC_CTX *ctx, smb_ucs2_t **dest, const char *src)
{
size_t size;
if (push_ucs2_talloc(ctx, dest, src, &size))
return size;
else
return -1;
}
/*******************************************************************
Convert a wchar to upper case.
********************************************************************/
smb_ucs2_t toupper_w(smb_ucs2_t val)
{
return upcase_table[SVAL(&val,0)];
}
/*******************************************************************
Convert a wchar to lower case.
********************************************************************/
smb_ucs2_t tolower_w( smb_ucs2_t val )
{
return lowcase_table[SVAL(&val,0)];
}
/*******************************************************************
Determine if a character is lowercase.
********************************************************************/
bool islower_w(smb_ucs2_t c)
{
return upcase_table[SVAL(&c,0)] != c;
}
/*******************************************************************
Determine if a character is uppercase.
********************************************************************/
bool isupper_w(smb_ucs2_t c)
{
return lowcase_table[SVAL(&c,0)] != c;
}
/*******************************************************************
Determine if a character is valid in a 8.3 name.
********************************************************************/
bool isvalid83_w(smb_ucs2_t c)
{
return valid_table[SVAL(&c,0)] != 0;
}
/*******************************************************************
Count the number of characters in a smb_ucs2_t string.
********************************************************************/
size_t strlen_w(const smb_ucs2_t *src)
{
size_t len;
smb_ucs2_t c;
for(len = 0; *(COPY_UCS2_CHAR(&c,src)); src++, len++) {
;
}
return len;
}
/*******************************************************************
Count up to max number of characters in a smb_ucs2_t string.
********************************************************************/
size_t strnlen_w(const smb_ucs2_t *src, size_t max)
{
size_t len;
smb_ucs2_t c;
for(len = 0; (len < max) && *(COPY_UCS2_CHAR(&c,src)); src++, len++) {
;
}
return len;
}
/*******************************************************************
Wide strchr().
********************************************************************/
smb_ucs2_t *strchr_w(const smb_ucs2_t *s, smb_ucs2_t c)
{
smb_ucs2_t cp;
while (*(COPY_UCS2_CHAR(&cp,s))) {
if (c == cp) {
return (smb_ucs2_t *)s;
}
s++;
}
if (c == cp) {
return (smb_ucs2_t *)s;
}
return NULL;
}
smb_ucs2_t *strchr_wa(const smb_ucs2_t *s, char c)
{
return strchr_w(s, UCS2_CHAR(c));
}
/*******************************************************************
Wide strrchr().
********************************************************************/
smb_ucs2_t *strrchr_w(const smb_ucs2_t *s, smb_ucs2_t c)
{
smb_ucs2_t cp;
const smb_ucs2_t *p = s;
int len = strlen_w(s);
if (len == 0) {
return NULL;
}
p += (len - 1);
do {
if (c == *(COPY_UCS2_CHAR(&cp,p))) {
return (smb_ucs2_t *)p;
}
} while (p-- != s);
return NULL;
}
/*******************************************************************
Wide version of strrchr that returns after doing strrchr 'n' times.
********************************************************************/
smb_ucs2_t *strnrchr_w(const smb_ucs2_t *s, smb_ucs2_t c, unsigned int n)
{
smb_ucs2_t cp;
const smb_ucs2_t *p = s;
int len = strlen_w(s);
if (len == 0 || !n) {
return NULL;
}
p += (len - 1);
do {
if (c == *(COPY_UCS2_CHAR(&cp,p))) {
n--;
}
if (!n) {
return (smb_ucs2_t *)p;
}
} while (p-- != s);
return NULL;
}
/*******************************************************************
Wide strstr().
********************************************************************/
smb_ucs2_t *strstr_w(const smb_ucs2_t *s, const smb_ucs2_t *ins)
{
smb_ucs2_t *r;
size_t inslen;
if (!s || !*s || !ins || !*ins) {
return NULL;
}
inslen = strlen_w(ins);
r = (smb_ucs2_t *)s;
while ((r = strchr_w(r, *ins))) {
if (strncmp_w(r, ins, inslen) == 0) {
return r;
}
r++;
}
return NULL;
}
/*******************************************************************
Convert a string to lower case.
return True if any char is converted
********************************************************************/
bool strlower_w(smb_ucs2_t *s)
{
smb_ucs2_t cp;
bool ret = False;
while (*(COPY_UCS2_CHAR(&cp,s))) {
smb_ucs2_t v = tolower_w(cp);
if (v != cp) {
COPY_UCS2_CHAR(s,&v);
ret = True;
}
s++;
}
return ret;
}
/*******************************************************************
Convert a string to upper case.
return True if any char is converted
********************************************************************/
bool strupper_w(smb_ucs2_t *s)
{
smb_ucs2_t cp;
bool ret = False;
while (*(COPY_UCS2_CHAR(&cp,s))) {
smb_ucs2_t v = toupper_w(cp);
if (v != cp) {
COPY_UCS2_CHAR(s,&v);
ret = True;
}
s++;
}
return ret;
}
/*******************************************************************
Convert a string to "normal" form.
********************************************************************/
void strnorm_w(smb_ucs2_t *s, int case_default)
{
if (case_default == CASE_UPPER) {
strupper_w(s);
} else {
strlower_w(s);
}
}
int strcmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b)
{
smb_ucs2_t cpa, cpb;
while ((*(COPY_UCS2_CHAR(&cpb,b))) && (*(COPY_UCS2_CHAR(&cpa,a)) == cpb)) {
a++;
b++;
}
return (*(COPY_UCS2_CHAR(&cpa,a)) - *(COPY_UCS2_CHAR(&cpb,b)));
/* warning: if *a != *b and both are not 0 we return a random
greater or lesser than 0 number not realted to which
string is longer */
}
int strncmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b, size_t len)
{
smb_ucs2_t cpa, cpb;
size_t n = 0;
while ((n < len) && (*(COPY_UCS2_CHAR(&cpb,b))) && (*(COPY_UCS2_CHAR(&cpa,a)) == cpb)) {
a++;
b++;
n++;
}
return (len - n)?(*(COPY_UCS2_CHAR(&cpa,a)) - *(COPY_UCS2_CHAR(&cpb,b))):0;
}
/*******************************************************************
Case insensitive string comparison.
********************************************************************/
int strcasecmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b)
{
smb_ucs2_t cpa, cpb;
while ((*COPY_UCS2_CHAR(&cpb,b)) && toupper_w(*(COPY_UCS2_CHAR(&cpa,a))) == toupper_w(cpb)) {
a++;
b++;
}
return (tolower_w(*(COPY_UCS2_CHAR(&cpa,a))) - tolower_w(*(COPY_UCS2_CHAR(&cpb,b))));
}
/*******************************************************************
Case insensitive string comparison, length limited.
********************************************************************/
int strncasecmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b, size_t len)
{
smb_ucs2_t cpa, cpb;
size_t n = 0;
while ((n < len) && *COPY_UCS2_CHAR(&cpb,b) && (toupper_w(*(COPY_UCS2_CHAR(&cpa,a))) == toupper_w(cpb))) {
a++;
b++;
n++;
}
return (len - n)?(tolower_w(*(COPY_UCS2_CHAR(&cpa,a))) - tolower_w(*(COPY_UCS2_CHAR(&cpb,b)))):0;
}
/*******************************************************************
Compare 2 strings.
********************************************************************/
bool strequal_w(const smb_ucs2_t *s1, const smb_ucs2_t *s2)
{
if (s1 == s2) {
return(True);
}
if (!s1 || !s2) {
return(False);
}
return(strcasecmp_w(s1,s2)==0);
}
/*******************************************************************
Compare 2 strings up to and including the nth char.
******************************************************************/
bool strnequal_w(const smb_ucs2_t *s1,const smb_ucs2_t *s2,size_t n)
{
if (s1 == s2) {
return(True);
}
if (!s1 || !s2 || !n) {
return(False);
}
return(strncasecmp_w(s1,s2,n)==0);
}
/*******************************************************************
Duplicate string.
********************************************************************/
smb_ucs2_t *strdup_w(const smb_ucs2_t *src)
{
return strndup_w(src, 0);
}
/* if len == 0 then duplicate the whole string */
smb_ucs2_t *strndup_w(const smb_ucs2_t *src, size_t len)
{
smb_ucs2_t *dest;
if (!len) {
len = strlen_w(src);
}
dest = SMB_MALLOC_ARRAY(smb_ucs2_t, len + 1);
if (!dest) {
DEBUG(0,("strdup_w: out of memory!\n"));
return NULL;
}
memcpy(dest, src, len * sizeof(smb_ucs2_t));
dest[len] = 0;
return dest;
}
/*******************************************************************
Copy a string with max len.
********************************************************************/
smb_ucs2_t *strncpy_w(smb_ucs2_t *dest, const smb_ucs2_t *src, const size_t max)
{
smb_ucs2_t cp;
size_t len;
if (!dest || !src) {
return NULL;
}
for (len = 0; (*COPY_UCS2_CHAR(&cp,(src+len))) && (len < max); len++) {
cp = *COPY_UCS2_CHAR(dest+len,src+len);
}
cp = 0;
for ( /*nothing*/ ; len < max; len++ ) {
cp = *COPY_UCS2_CHAR(dest+len,&cp);
}
return dest;
}
/*******************************************************************
Append a string of len bytes and add a terminator.
********************************************************************/
smb_ucs2_t *strncat_w(smb_ucs2_t *dest, const smb_ucs2_t *src, const size_t max)
{
size_t start;
size_t len;
smb_ucs2_t z = 0;
if (!dest || !src) {
return NULL;
}
start = strlen_w(dest);
len = strnlen_w(src, max);
memcpy(&dest[start], src, len*sizeof(smb_ucs2_t));
z = *COPY_UCS2_CHAR(dest+start+len,&z);
return dest;
}
smb_ucs2_t *strcat_w(smb_ucs2_t *dest, const smb_ucs2_t *src)
{
size_t start;
size_t len;
smb_ucs2_t z = 0;
if (!dest || !src) {
return NULL;
}
start = strlen_w(dest);
len = strlen_w(src);
memcpy(&dest[start], src, len*sizeof(smb_ucs2_t));
z = *COPY_UCS2_CHAR(dest+start+len,&z);
return dest;
}
/*******************************************************************
Replace any occurence of oldc with newc in unicode string.
********************************************************************/
void string_replace_w(smb_ucs2_t *s, smb_ucs2_t oldc, smb_ucs2_t newc)
{
smb_ucs2_t cp;
for(;*(COPY_UCS2_CHAR(&cp,s));s++) {
if(cp==oldc) {
COPY_UCS2_CHAR(s,&newc);
}
}
}
/*******************************************************************
Trim unicode string.
********************************************************************/
bool trim_string_w(smb_ucs2_t *s, const smb_ucs2_t *front,
const smb_ucs2_t *back)
{
bool ret = False;
size_t len, front_len, back_len;
if (!s) {
return False;
}
len = strlen_w(s);
if (front && *front) {
front_len = strlen_w(front);
while (len && strncmp_w(s, front, front_len) == 0) {
memmove(s, (s + front_len), (len - front_len + 1) * sizeof(smb_ucs2_t));
len -= front_len;
ret = True;
}
}
if (back && *back) {
back_len = strlen_w(back);
while (len && strncmp_w((s + (len - back_len)), back, back_len) == 0) {
s[len - back_len] = 0;
len -= back_len;
ret = True;
}
}
return ret;
}
/*
The *_wa() functions take a combination of 7 bit ascii
and wide characters They are used so that you can use string
functions combining C string constants with ucs2 strings
The char* arguments must NOT be multibyte - to be completely sure
of this only pass string constants */
int strcmp_wa(const smb_ucs2_t *a, const char *b)
{
smb_ucs2_t cp = 0;
while (*b && *(COPY_UCS2_CHAR(&cp,a)) == UCS2_CHAR(*b)) {
a++;
b++;
}
return (*(COPY_UCS2_CHAR(&cp,a)) - UCS2_CHAR(*b));
}
int strncmp_wa(const smb_ucs2_t *a, const char *b, size_t len)
{
smb_ucs2_t cp = 0;
size_t n = 0;
while ((n < len) && *b && *(COPY_UCS2_CHAR(&cp,a)) == UCS2_CHAR(*b)) {
a++;
b++;
n++;
}
return (len - n)?(*(COPY_UCS2_CHAR(&cp,a)) - UCS2_CHAR(*b)):0;
}
smb_ucs2_t *strpbrk_wa(const smb_ucs2_t *s, const char *p)
{
smb_ucs2_t cp;
while (*(COPY_UCS2_CHAR(&cp,s))) {
int i;
for (i=0; p[i] && cp != UCS2_CHAR(p[i]); i++)
;
if (p[i]) {
return (smb_ucs2_t *)s;
}
s++;
}
return NULL;
}
smb_ucs2_t *strstr_wa(const smb_ucs2_t *s, const char *ins)
{
smb_ucs2_t *r;
size_t inslen;
if (!s || !ins) {
return NULL;
}
inslen = strlen(ins);
r = (smb_ucs2_t *)s;
while ((r = strchr_w(r, UCS2_CHAR(*ins)))) {
if (strncmp_wa(r, ins, inslen) == 0)
return r;
r++;
}
return NULL;
}
/*******************************************************************
Returns the length in number of wide characters.
******************************************************************/
int unistrlen(uint16 *s)
{
int len;
if (!s) {
return -1;
}
for (len=0; SVAL(s,0); s++,len++) {
;
}
return len;
}
/*******************************************************************
Strcpy for unicode strings. Returns length (in num of wide chars).
Not odd align safe.
********************************************************************/
int unistrcpy(uint16 *dst, uint16 *src)
{
int num_wchars = 0;
while (SVAL(src,0)) {
*dst++ = *src++;
num_wchars++;
}
*dst = 0;
return num_wchars;
}
/*************************************************************
ascii only toupper - saves the need for smbd to be in C locale.
*************************************************************/
int toupper_ascii(int c)
{
smb_ucs2_t uc = toupper_w(UCS2_CHAR(c));
return UCS2_TO_CHAR(uc);
}
/*************************************************************
ascii only tolower - saves the need for smbd to be in C locale.
*************************************************************/
int tolower_ascii(int c)
{
smb_ucs2_t uc = tolower_w(UCS2_CHAR(c));
return UCS2_TO_CHAR(uc);
}
/*************************************************************
ascii only isupper - saves the need for smbd to be in C locale.
*************************************************************/
int isupper_ascii(int c)
{
return isupper_w(UCS2_CHAR(c));
}
/*************************************************************
ascii only islower - saves the need for smbd to be in C locale.
*************************************************************/
int islower_ascii(int c)
{
return islower_w(UCS2_CHAR(c));
}
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