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|
/*
Unix SMB/CIFS implementation.
Character set conversion Extensions
Copyright (C) Igor Vergeichik <iverg@mail.ru> 2001
Copyright (C) Andrew Tridgell 2001
Copyright (C) Simo Sorce 2001
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/**
* @file
*
* @brief Character-set conversion routines built on our iconv.
*
* @note Samba's internal character set (at least in the 3.0 series)
* is always the same as the one for the Unix filesystem. It is
* <b>not</b> necessarily UTF-8 and may be different on machines that
* need i18n filenames to be compatible with Unix software. It does
* have to be a superset of ASCII. All multibyte sequences must start
* with a byte with the high bit set.
*
* @sa lib/iconv.c
*/
static pstring cvtbuf;
static smb_iconv_t conv_handles[NUM_CHARSETS][NUM_CHARSETS];
/**
* Return the name of a charset to give to iconv().
**/
static const char *charset_name(charset_t ch)
{
const char *ret = NULL;
if (ch == CH_UCS2) ret = "UCS-2LE";
else if (ch == CH_UNIX) ret = lp_unix_charset();
else if (ch == CH_DOS) ret = lp_dos_charset();
else if (ch == CH_DISPLAY) ret = lp_display_charset();
else if (ch == CH_UTF8) ret = "UTF8";
if (!ret || !*ret) ret = "ASCII";
return ret;
}
static void lazy_initialize_conv(void)
{
static int initialized = False;
if (!initialized) {
initialized = True;
load_case_tables();
init_iconv();
}
}
/**
* Initialize iconv conversion descriptors.
*
* This is called the first time it is needed, and also called again
* every time the configuration is reloaded, because the charset or
* codepage might have changed.
**/
void init_iconv(void)
{
int c1, c2;
BOOL did_reload = False;
/* so that charset_name() works we need to get the UNIX<->UCS2 going
first */
if (!conv_handles[CH_UNIX][CH_UCS2])
conv_handles[CH_UNIX][CH_UCS2] = smb_iconv_open("UCS-2LE", "ASCII");
if (!conv_handles[CH_UCS2][CH_UNIX])
conv_handles[CH_UCS2][CH_UNIX] = smb_iconv_open("ASCII", "UCS-2LE");
for (c1=0;c1<NUM_CHARSETS;c1++) {
for (c2=0;c2<NUM_CHARSETS;c2++) {
const char *n1 = charset_name((charset_t)c1);
const char *n2 = charset_name((charset_t)c2);
if (conv_handles[c1][c2] &&
strcmp(n1, conv_handles[c1][c2]->from_name) == 0 &&
strcmp(n2, conv_handles[c1][c2]->to_name) == 0)
continue;
did_reload = True;
if (conv_handles[c1][c2])
smb_iconv_close(conv_handles[c1][c2]);
conv_handles[c1][c2] = smb_iconv_open(n2,n1);
if (conv_handles[c1][c2] == (smb_iconv_t)-1) {
DEBUG(0,("Conversion from %s to %s not supported\n",
charset_name((charset_t)c1), charset_name((charset_t)c2)));
conv_handles[c1][c2] = NULL;
}
}
}
if (did_reload) {
init_valid_table();
}
}
/**
* Convert string from one encoding to another, making error checking etc
*
* @param src pointer to source string (multibyte or singlebyte)
* @param srclen length of the source string in bytes
* @param dest pointer to destination string (multibyte or singlebyte)
* @param destlen maximal length allowed for string
* @returns the number of bytes occupied in the destination
**/
size_t convert_string(charset_t from, charset_t to,
void const *src, size_t srclen,
void *dest, size_t destlen)
{
size_t i_len, o_len;
size_t retval;
const char* inbuf = (const char*)src;
char* outbuf = (char*)dest;
smb_iconv_t descriptor;
if (srclen == (size_t)-1)
srclen = strlen(src)+1;
lazy_initialize_conv();
descriptor = conv_handles[from][to];
if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) {
/* conversion not supported, use as is */
size_t len = MIN(srclen,destlen);
memcpy(dest,src,len);
return len;
}
i_len=srclen;
o_len=destlen;
retval = smb_iconv(descriptor, &inbuf, &i_len, &outbuf, &o_len);
if(retval==(size_t)-1) {
const char *reason="unknown error";
switch(errno) {
case EINVAL:
reason="Incomplete multibyte sequence";
break;
case E2BIG:
reason="No more room";
DEBUG(0, ("convert_string: Required %d, available %d\n",
srclen, destlen));
/* we are not sure we need srclen bytes,
may be more, may be less.
We only know we need more than destlen
bytes ---simo */
break;
case EILSEQ:
reason="Illegal multibyte sequence";
break;
}
/* smb_panic(reason); */
}
return destlen-o_len;
}
/**
* Convert between character sets, allocating a new buffer for the result.
*
* @param srclen length of source buffer.
* @param dest always set at least to NULL
* @note -1 is not accepted for srclen.
*
* @returns Size in bytes of the converted string; or -1 in case of error.
**/
size_t convert_string_allocate(charset_t from, charset_t to,
void const *src, size_t srclen, void **dest)
{
size_t i_len, o_len, destlen;
size_t retval;
const char *inbuf = (const char *)src;
char *outbuf, *ob;
smb_iconv_t descriptor;
*dest = NULL;
if (src == NULL || srclen == (size_t)-1)
return (size_t)-1;
lazy_initialize_conv();
descriptor = conv_handles[from][to];
if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) {
/* conversion not supported, return -1*/
DEBUG(3, ("convert_string_allocate: conversion not supported!\n"));
return -1;
}
destlen = MAX(srclen, 512);
outbuf = NULL;
convert:
destlen = destlen * 2;
ob = (char *)realloc(outbuf, destlen);
if (!ob) {
DEBUG(0, ("convert_string_allocate: realloc failed!\n"));
SAFE_FREE(outbuf);
return (size_t)-1;
}
else
outbuf = ob;
i_len = srclen;
o_len = destlen;
retval = smb_iconv(descriptor,
&inbuf, &i_len,
&outbuf, &o_len);
if(retval == (size_t)-1) {
const char *reason="unknown error";
switch(errno) {
case EINVAL:
reason="Incomplete multibyte sequence";
break;
case E2BIG:
goto convert;
case EILSEQ:
reason="Illegal multibyte sequence";
break;
}
DEBUG(0,("Conversion error: %s(%s)\n",reason,inbuf));
/* smb_panic(reason); */
return (size_t)-1;
}
destlen = destlen - o_len;
*dest = (char *)Realloc(ob,destlen);
if (!*dest) {
DEBUG(0, ("convert_string_allocate: out of memory!\n"));
SAFE_FREE(ob);
return (size_t)-1;
}
return destlen;
}
/**
* Convert between character sets, allocating a new buffer using talloc for the result.
*
* @param srclen length of source buffer.
* @param dest always set at least to NULL
* @note -1 is not accepted for srclen.
*
* @returns Size in bytes of the converted string; or -1 in case of error.
**/
static size_t convert_string_talloc(TALLOC_CTX *ctx, charset_t from, charset_t to,
void const *src, size_t srclen, void **dest)
{
void *alloced_string;
size_t dest_len;
*dest = NULL;
dest_len=convert_string_allocate(from, to, src, srclen, &alloced_string);
if (dest_len == (size_t)-1)
return (size_t)-1;
*dest = talloc_memdup(ctx, alloced_string, dest_len);
SAFE_FREE(alloced_string);
if (*dest == NULL)
return (size_t)-1;
return dest_len;
}
size_t unix_strupper(const char *src, size_t srclen, char *dest, size_t destlen)
{
size_t size;
smb_ucs2_t *buffer=(smb_ucs2_t*)cvtbuf;
size=convert_string(CH_UNIX, CH_UCS2, src, srclen, buffer, sizeof(cvtbuf));
if (!strupper_w(buffer) && (dest == src))
return srclen;
return convert_string(CH_UCS2, CH_UNIX, buffer, size, dest, destlen);
}
size_t unix_strlower(const char *src, size_t srclen, char *dest, size_t destlen)
{
size_t size;
smb_ucs2_t *buffer=(smb_ucs2_t*)cvtbuf;
size=convert_string(CH_UNIX, CH_UCS2, src, srclen, buffer, sizeof(cvtbuf));
if (!strlower_w(buffer) && (dest == src))
return srclen;
return convert_string(CH_UCS2, CH_UNIX, buffer, size, dest, destlen);
}
static size_t ucs2_align(const void *base_ptr, const void *p, int flags)
{
if (flags & (STR_NOALIGN|STR_ASCII))
return 0;
return PTR_DIFF(p, base_ptr) & 1;
}
/**
* Copy a string from a char* unix src to a dos codepage string destination.
*
* @return the number of bytes occupied by the string in the destination.
*
* @param flags can include
* <dl>
* <dt>STR_TERMINATE</dt> <dd>means include the null termination</dd>
* <dt>STR_UPPER</dt> <dd>means uppercase in the destination</dd>
* </dl>
*
* @param dest_len the maximum length in bytes allowed in the
* destination. If @p dest_len is -1 then no maximum is used.
**/
size_t push_ascii(void *dest, const char *src, size_t dest_len, int flags)
{
size_t src_len = strlen(src);
pstring tmpbuf;
/* treat a pstring as "unlimited" length */
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (flags & STR_UPPER) {
pstrcpy(tmpbuf, src);
strupper(tmpbuf);
src = tmpbuf;
}
if (flags & STR_TERMINATE)
src_len++;
return convert_string(CH_UNIX, CH_DOS, src, src_len, dest, dest_len);
}
size_t push_ascii_fstring(void *dest, const char *src)
{
return push_ascii(dest, src, sizeof(fstring), STR_TERMINATE);
}
size_t push_ascii_pstring(void *dest, const char *src)
{
return push_ascii(dest, src, sizeof(pstring), STR_TERMINATE);
}
/**
* Copy a string from a dos codepage source to a unix char* destination.
*
* The resulting string in "dest" is always null terminated.
*
* @param flags can have:
* <dl>
* <dt>STR_TERMINATE</dt>
* <dd>STR_TERMINATE means the string in @p src
* is null terminated, and src_len is ignored.</dd>
* </dl>
*
* @param src_len is the length of the source area in bytes.
* @returns the number of bytes occupied by the string in @p src.
**/
size_t pull_ascii(char *dest, const void *src, size_t dest_len, size_t src_len, int flags)
{
size_t ret;
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (flags & STR_TERMINATE) {
if (src_len == (size_t)-1) {
src_len = strlen(src) + 1;
} else {
size_t len = strnlen(src, src_len);
if (len < src_len)
len++;
src_len = len;
}
}
ret = convert_string(CH_DOS, CH_UNIX, src, src_len, dest, dest_len);
if (dest_len)
dest[MIN(ret, dest_len-1)] = 0;
return src_len;
}
size_t pull_ascii_pstring(char *dest, const void *src)
{
return pull_ascii(dest, src, sizeof(pstring), -1, STR_TERMINATE);
}
size_t pull_ascii_fstring(char *dest, const void *src)
{
return pull_ascii(dest, src, sizeof(fstring), -1, STR_TERMINATE);
}
/**
* Copy a string from a char* src to a unicode destination.
*
* @returns the number of bytes occupied by the string in the destination.
*
* @param flags can have:
*
* <dl>
* <dt>STR_TERMINATE <dd>means include the null termination.
* <dt>STR_UPPER <dd>means uppercase in the destination.
* <dt>STR_NOALIGN <dd>means don't do alignment.
* </dl>
*
* @param dest_len is the maximum length allowed in the
* destination. If dest_len is -1 then no maxiumum is used.
**/
size_t push_ucs2(const void *base_ptr, void *dest, const char *src, size_t dest_len, int flags)
{
size_t len=0;
size_t src_len = strlen(src);
pstring tmpbuf;
/* treat a pstring as "unlimited" length */
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (flags & STR_UPPER) {
pstrcpy(tmpbuf, src);
strupper(tmpbuf);
src = tmpbuf;
}
if (flags & STR_TERMINATE)
src_len++;
if (ucs2_align(base_ptr, dest, flags)) {
*(char *)dest = 0;
dest = (void *)((char *)dest + 1);
if (dest_len) dest_len--;
len++;
}
/* ucs2 is always a multiple of 2 bytes */
dest_len &= ~1;
len += convert_string(CH_UNIX, CH_UCS2, src, src_len, dest, dest_len);
return len;
}
/**
* Copy a string from a unix char* src to a UCS2 destination,
* allocating a buffer using talloc().
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
* or -1 in case of error.
**/
size_t push_ucs2_talloc(TALLOC_CTX *ctx, smb_ucs2_t **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_talloc(ctx, CH_UNIX, CH_UCS2, src, src_len, (void **)dest);
}
/**
* Copy a string from a unix char* src to a UCS2 destination, allocating a buffer
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
* or -1 in case of error.
**/
size_t push_ucs2_allocate(smb_ucs2_t **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_allocate(CH_UNIX, CH_UCS2, src, src_len, (void **)dest);
}
/**
Copy a string from a char* src to a UTF-8 destination.
Return the number of bytes occupied by the string in the destination
Flags can have:
STR_TERMINATE means include the null termination
STR_UPPER means uppercase in the destination
dest_len is the maximum length allowed in the destination. If dest_len
is -1 then no maxiumum is used.
**/
static size_t push_utf8(void *dest, const char *src, size_t dest_len, int flags)
{
size_t src_len = strlen(src);
pstring tmpbuf;
/* treat a pstring as "unlimited" length */
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (flags & STR_UPPER) {
pstrcpy(tmpbuf, src);
strupper(tmpbuf);
src = tmpbuf;
}
if (flags & STR_TERMINATE)
src_len++;
return convert_string(CH_UNIX, CH_UTF8, src, src_len, dest, dest_len);
}
size_t push_utf8_fstring(void *dest, const char *src)
{
return push_utf8(dest, src, sizeof(fstring), STR_TERMINATE);
}
/**
* Copy a string from a unix char* src to a UTF-8 destination, allocating a buffer using talloc
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t push_utf8_talloc(TALLOC_CTX *ctx, char **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_talloc(ctx, CH_UNIX, CH_UTF8, src, src_len, (void**)dest);
}
/**
* Copy a string from a unix char* src to a UTF-8 destination, allocating a buffer
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t push_utf8_allocate(char **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_allocate(CH_UNIX, CH_UTF8, src, src_len, (void **)dest);
}
/**
Copy a string from a ucs2 source to a unix char* destination.
Flags can have:
STR_TERMINATE means the string in src is null terminated.
STR_NOALIGN means don't try to align.
if STR_TERMINATE is set then src_len is ignored if it is -1.
src_len is the length of the source area in bytes
Return the number of bytes occupied by the string in src.
The resulting string in "dest" is always null terminated.
**/
size_t pull_ucs2(const void *base_ptr, char *dest, const void *src, size_t dest_len, size_t src_len, int flags)
{
size_t ret;
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (ucs2_align(base_ptr, src, flags)) {
src = (const void *)((const char *)src + 1);
if (src_len > 0)
src_len--;
}
if (flags & STR_TERMINATE) {
if (src_len == (size_t)-1) {
src_len = strlen_w(src)*2 + 2;
} else {
size_t len = strnlen_w(src, src_len/2);
if (len < src_len/2)
len++;
src_len = len*2;
}
}
/* ucs2 is always a multiple of 2 bytes */
if (src_len != (size_t)-1)
src_len &= ~1;
ret = convert_string(CH_UCS2, CH_UNIX, src, src_len, dest, dest_len);
if (dest_len)
dest[MIN(ret, dest_len-1)] = 0;
return src_len;
}
size_t pull_ucs2_pstring(char *dest, const void *src)
{
return pull_ucs2(NULL, dest, src, sizeof(pstring), -1, STR_TERMINATE);
}
size_t pull_ucs2_fstring(char *dest, const void *src)
{
return pull_ucs2(NULL, dest, src, sizeof(fstring), -1, STR_TERMINATE);
}
/**
* Copy a string from a UCS2 src to a unix char * destination, allocating a buffer using talloc
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t pull_ucs2_talloc(TALLOC_CTX *ctx, char **dest, const smb_ucs2_t *src)
{
size_t src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t);
*dest = NULL;
return convert_string_talloc(ctx, CH_UCS2, CH_UNIX, src, src_len, (void **)dest);
}
/**
* Copy a string from a UCS2 src to a unix char * destination, allocating a buffer
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t pull_ucs2_allocate(void **dest, const smb_ucs2_t *src)
{
size_t src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t);
*dest = NULL;
return convert_string_allocate(CH_UCS2, CH_UNIX, src, src_len, dest);
}
/**
* Copy a string from a UTF-8 src to a unix char * destination, allocating a buffer using talloc
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t pull_utf8_talloc(TALLOC_CTX *ctx, char **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_talloc(ctx, CH_UTF8, CH_UNIX, src, src_len, (void **)dest);
}
/**
* Copy a string from a UTF-8 src to a unix char * destination, allocating a buffer
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t pull_utf8_allocate(void **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_allocate(CH_UTF8, CH_UNIX, src, src_len, dest);
}
/**
Copy a string from a char* src to a unicode or ascii
dos codepage destination choosing unicode or ascii based on the
flags in the SMB buffer starting at base_ptr.
Return the number of bytes occupied by the string in the destination.
flags can have:
STR_TERMINATE means include the null termination.
STR_UPPER means uppercase in the destination.
STR_ASCII use ascii even with unicode packet.
STR_NOALIGN means don't do alignment.
dest_len is the maximum length allowed in the destination. If dest_len
is -1 then no maxiumum is used.
**/
size_t push_string_fn(const char *function, unsigned int line, const void *base_ptr, void *dest, const char *src, size_t dest_len, int flags)
{
if (dest_len != (size_t)-1)
clobber_region(function, line, dest, dest_len);
if (!(flags & STR_ASCII) && \
((flags & STR_UNICODE || \
(SVAL(base_ptr, smb_flg2) & FLAGS2_UNICODE_STRINGS)))) {
return push_ucs2(base_ptr, dest, src, dest_len, flags);
}
return push_ascii(dest, src, dest_len, flags);
}
/**
Copy a string from a unicode or ascii source (depending on
the packet flags) to a char* destination.
Flags can have:
STR_TERMINATE means the string in src is null terminated.
STR_UNICODE means to force as unicode.
STR_ASCII use ascii even with unicode packet.
STR_NOALIGN means don't do alignment.
if STR_TERMINATE is set then src_len is ignored is it is -1
src_len is the length of the source area in bytes.
Return the number of bytes occupied by the string in src.
The resulting string in "dest" is always null terminated.
**/
size_t pull_string_fn(const char *function, unsigned int line, const void *base_ptr, char *dest, const void *src, size_t dest_len, size_t src_len, int flags)
{
if (dest_len != (size_t)-1)
clobber_region(function, line, dest, dest_len);
if (!(flags & STR_ASCII) && \
((flags & STR_UNICODE || \
(SVAL(base_ptr, smb_flg2) & FLAGS2_UNICODE_STRINGS)))) {
return pull_ucs2(base_ptr, dest, src, dest_len, src_len, flags);
}
return pull_ascii(dest, src, dest_len, src_len, flags);
}
size_t align_string(const void *base_ptr, const char *p, int flags)
{
if (!(flags & STR_ASCII) && \
((flags & STR_UNICODE || \
(SVAL(base_ptr, smb_flg2) & FLAGS2_UNICODE_STRINGS)))) {
return ucs2_align(base_ptr, p, flags);
}
return 0;
}
/**
Convert from unix to ucs2 charset and return the
allocated and converted string or NULL if an error occurred.
You must provide a zero terminated string.
The returning string will be zero terminated.
**/
smb_ucs2_t *acnv_uxu2(const char *src)
{
size_t slen;
size_t dlen;
void *dest;
slen = strlen(src) + 1;
dlen = convert_string_allocate(CH_UNIX, CH_UCS2, src, slen, &dest);
if (dlen == (size_t)-1)
return NULL;
else
return dest;
}
/**
Convert from dos to ucs2 charset and return the
allocated and converted string or NULL if an error occurred.
You must provide a zero terminated string.
The returning string will be zero terminated.
**/
smb_ucs2_t *acnv_dosu2(const char *src)
{
size_t slen;
size_t dlen;
void *dest;
slen = strlen(src) + 1;
dlen = convert_string_allocate(CH_DOS, CH_UCS2, src, slen, &dest);
if (dlen == (size_t)-1)
return NULL;
else
return dest;
}
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