+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
- minimal iconv implementation
- Copyright (C) Andrew Tridgell 2001
- Copyright (C) Jelmer Vernooij 2002,2003
-
- 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"
-
-/*
- * We have to use strcasecmp here as the character conversions
- * haven't been initialised yet. JRA.
- */
-
-#undef strcasecmp
-
-/**
- * @file
- *
- * @brief Samba wrapper/stub for iconv character set conversion.
- *
- * iconv is the XPG2 interface for converting between character
- * encodings. This file provides a Samba wrapper around it, and also
- * a simple reimplementation that is used if the system does not
- * implement iconv.
- *
- * Samba only works with encodings that are supersets of ASCII: ascii
- * characters like whitespace can be tested for directly, multibyte
- * sequences start with a byte with the high bit set, and strings are
- * terminated by a nul byte.
- *
- * Note that the only function provided by iconv is conversion between
- * characters. It doesn't directly support operations like
- * uppercasing or comparison. We have to convert to UCS-2 and compare
- * there.
- *
- * @sa Samba Developers Guide
- **/
-
-static_decl_charset;
-
-static size_t ascii_pull(void *,const char **, size_t *, char **, size_t *);
-static size_t ascii_push(void *,const char **, size_t *, char **, size_t *);
-static size_t latin1_push(void *,const char **, size_t *, char **, size_t *);
-static size_t utf8_pull(void *,const char **, size_t *, char **, size_t *);
-static size_t utf8_push(void *,const char **, size_t *, char **, size_t *);
-static size_t ucs2hex_pull(void *,const char **, size_t *, char **, size_t *);
-static size_t ucs2hex_push(void *,const char **, size_t *, char **, size_t *);
-static size_t iconv_copy(void *,const char **, size_t *, char **, size_t *);
-static size_t iconv_swab (void *,const char **, size_t *, char **, size_t *);
-
-static struct charset_functions builtin_functions[] = {
- /* windows is really neither UCS-2 not UTF-16 */
- {"UCS-2LE", iconv_copy, iconv_copy},
- {"UTF-16LE", iconv_copy, iconv_copy},
- {"UCS-2BE", iconv_swab, iconv_swab},
- {"UTF-16BE", iconv_swab, iconv_swab},
-
- /* we include the UTF-8 alias to cope with differing locale settings */
- {"UTF8", utf8_pull, utf8_push},
- {"UTF-8", utf8_pull, utf8_push},
- {"ASCII", ascii_pull, ascii_push},
- {"646", ascii_pull, ascii_push},
- {"ISO-8859-1", ascii_pull, latin1_push},
- {"UCS2-HEX", ucs2hex_pull, ucs2hex_push},
- {NULL, NULL, NULL}
-};
-
-static struct charset_functions *charsets = NULL;
-
-static struct charset_functions *find_charset_functions(const char *name)
-{
- struct charset_functions *c = charsets;
-
- while(c) {
- if (strcasecmp(name, c->name) == 0) {
- return c;
- }
- c = c->next;
- }
-
- return NULL;
-}
-
-NTSTATUS smb_register_charset(struct charset_functions *funcs)
-{
- if (!funcs) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- DEBUG(5, ("Attempting to register new charset %s\n", funcs->name));
- /* Check whether we already have this charset... */
- if (find_charset_functions(funcs->name)) {
- DEBUG(0, ("Duplicate charset %s, not registering\n", funcs->name));
- return NT_STATUS_OBJECT_NAME_COLLISION;
- }
-
- funcs->next = funcs->prev = NULL;
- DEBUG(5, ("Registered charset %s\n", funcs->name));
- DLIST_ADD(charsets, funcs);
- return NT_STATUS_OK;
-}
-
-static void lazy_initialize_iconv(void)
-{
- static bool initialized;
- int i;
-
- if (!initialized) {
- initialized = True;
- for(i = 0; builtin_functions[i].name; i++)
- smb_register_charset(&builtin_functions[i]);
- static_init_charset;
- }
-}
-
-#ifdef HAVE_NATIVE_ICONV
-/* if there was an error then reset the internal state,
- this ensures that we don't have a shift state remaining for
- character sets like SJIS */
-static size_t sys_iconv(void *cd,
- const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- size_t ret = iconv((iconv_t)cd,
- (void *)inbuf, inbytesleft,
- outbuf, outbytesleft);
- if (ret == (size_t)-1) {
- int saved_errno = errno;
- iconv(cd, NULL, NULL, NULL, NULL);
- errno = saved_errno;
- }
- return ret;
-}
-#endif
-
-/**
- * This is a simple portable iconv() implementaion.
- *
- * It only knows about a very small number of character sets - just
- * enough that Samba works on systems that don't have iconv.
- **/
-size_t smb_iconv(smb_iconv_t cd,
- const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- char cvtbuf[2048];
- char *bufp = cvtbuf;
- size_t bufsize;
-
- /* in many cases we can go direct */
- if (cd->direct) {
- return cd->direct(cd->cd_direct,
- inbuf, inbytesleft, outbuf, outbytesleft);
- }
-
-
- /* otherwise we have to do it chunks at a time */
- while (*inbytesleft > 0) {
- bufp = cvtbuf;
- bufsize = sizeof(cvtbuf);
-
- if (cd->pull(cd->cd_pull,
- inbuf, inbytesleft, &bufp, &bufsize) == -1
- && errno != E2BIG) return -1;
-
- bufp = cvtbuf;
- bufsize = sizeof(cvtbuf) - bufsize;
-
- if (cd->push(cd->cd_push,
- (const char **)&bufp, &bufsize,
- outbuf, outbytesleft) == -1) return -1;
- }
-
- return 0;
-}
-
-
-static bool is_utf16(const char *name)
-{
- return strcasecmp(name, "UCS-2LE") == 0 ||
- strcasecmp(name, "UTF-16LE") == 0;
-}
-
-/*
- simple iconv_open() wrapper
- */
-smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode)
-{
- smb_iconv_t ret;
- struct charset_functions *from, *to;
-
- lazy_initialize_iconv();
- from = charsets;
- to = charsets;
-
- ret = SMB_MALLOC_P(struct smb_iconv_s);
- if (!ret) {
- errno = ENOMEM;
- return (smb_iconv_t)-1;
- }
- memset(ret, 0, sizeof(struct smb_iconv_s));
-
- ret->from_name = SMB_STRDUP(fromcode);
- ret->to_name = SMB_STRDUP(tocode);
-
- /* check for the simplest null conversion */
- if (strcasecmp(fromcode, tocode) == 0) {
- ret->direct = iconv_copy;
- return ret;
- }
-
- /* check if we have a builtin function for this conversion */
- from = find_charset_functions(fromcode);
- if(from)ret->pull = from->pull;
-
- to = find_charset_functions(tocode);
- if(to)ret->push = to->push;
-
- /* check if we can use iconv for this conversion */
-#ifdef HAVE_NATIVE_ICONV
- if (!ret->pull) {
- ret->cd_pull = iconv_open("UTF-16LE", fromcode);
- if (ret->cd_pull == (iconv_t)-1)
- ret->cd_pull = iconv_open("UCS-2LE", fromcode);
- if (ret->cd_pull != (iconv_t)-1)
- ret->pull = sys_iconv;
- }
-
- if (!ret->push) {
- ret->cd_push = iconv_open(tocode, "UTF-16LE");
- if (ret->cd_push == (iconv_t)-1)
- ret->cd_push = iconv_open(tocode, "UCS-2LE");
- if (ret->cd_push != (iconv_t)-1)
- ret->push = sys_iconv;
- }
-#endif
-
- /* check if there is a module available that can do this conversion */
- if (!ret->pull && NT_STATUS_IS_OK(smb_probe_module("charset", fromcode))) {
- if(!(from = find_charset_functions(fromcode)))
- DEBUG(0, ("Module %s doesn't provide charset %s!\n", fromcode, fromcode));
- else
- ret->pull = from->pull;
- }
-
- if (!ret->push && NT_STATUS_IS_OK(smb_probe_module("charset", tocode))) {
- if(!(to = find_charset_functions(tocode)))
- DEBUG(0, ("Module %s doesn't provide charset %s!\n", tocode, tocode));
- else
- ret->push = to->push;
- }
-
- if (!ret->push || !ret->pull) {
- SAFE_FREE(ret->from_name);
- SAFE_FREE(ret->to_name);
- SAFE_FREE(ret);
- errno = EINVAL;
- return (smb_iconv_t)-1;
- }
-
- /* check for conversion to/from ucs2 */
- if (is_utf16(fromcode) && to) {
- ret->direct = to->push;
- ret->push = ret->pull = NULL;
- return ret;
- }
-
- if (is_utf16(tocode) && from) {
- ret->direct = from->pull;
- ret->push = ret->pull = NULL;
- return ret;
- }
-
- /* Check if we can do the conversion direct */
-#ifdef HAVE_NATIVE_ICONV
- if (is_utf16(fromcode)) {
- ret->direct = sys_iconv;
- ret->cd_direct = ret->cd_push;
- ret->cd_push = NULL;
- return ret;
- }
- if (is_utf16(tocode)) {
- ret->direct = sys_iconv;
- ret->cd_direct = ret->cd_pull;
- ret->cd_pull = NULL;
- return ret;
- }
-#endif
-
- return ret;
-}
-
-/*
- simple iconv_close() wrapper
-*/
-int smb_iconv_close (smb_iconv_t cd)
-{
-#ifdef HAVE_NATIVE_ICONV
- if (cd->cd_direct) iconv_close((iconv_t)cd->cd_direct);
- if (cd->cd_pull) iconv_close((iconv_t)cd->cd_pull);
- if (cd->cd_push) iconv_close((iconv_t)cd->cd_push);
-#endif
-
- SAFE_FREE(cd->from_name);
- SAFE_FREE(cd->to_name);
-
- memset(cd, 0, sizeof(*cd));
- SAFE_FREE(cd);
- return 0;
-}
-
-
-/**********************************************************************
- the following functions implement the builtin character sets in Samba
- and also the "test" character sets that are designed to test
- multi-byte character set support for english users
-***********************************************************************/
-
-static size_t ascii_pull(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- while (*inbytesleft >= 1 && *outbytesleft >= 2) {
- (*outbuf)[0] = (*inbuf)[0];
- (*outbuf)[1] = 0;
- (*inbytesleft) -= 1;
- (*outbytesleft) -= 2;
- (*inbuf) += 1;
- (*outbuf) += 2;
- }
-
- if (*inbytesleft > 0) {
- errno = E2BIG;
- return -1;
- }
-
- return 0;
-}
-
-static size_t ascii_push(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- int ir_count=0;
-
- while (*inbytesleft >= 2 && *outbytesleft >= 1) {
- (*outbuf)[0] = (*inbuf)[0] & 0x7F;
- if ((*inbuf)[1]) ir_count++;
- (*inbytesleft) -= 2;
- (*outbytesleft) -= 1;
- (*inbuf) += 2;
- (*outbuf) += 1;
- }
-
- if (*inbytesleft == 1) {
- errno = EINVAL;
- return -1;
- }
-
- if (*inbytesleft > 1) {
- errno = E2BIG;
- return -1;
- }
-
- return ir_count;
-}
-
-static size_t latin1_push(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- int ir_count=0;
-
- while (*inbytesleft >= 2 && *outbytesleft >= 1) {
- (*outbuf)[0] = (*inbuf)[0];
- if ((*inbuf)[1]) ir_count++;
- (*inbytesleft) -= 2;
- (*outbytesleft) -= 1;
- (*inbuf) += 2;
- (*outbuf) += 1;
- }
-
- if (*inbytesleft == 1) {
- errno = EINVAL;
- return -1;
- }
-
- if (*inbytesleft > 1) {
- errno = E2BIG;
- return -1;
- }
-
- return ir_count;
-}
-
-static size_t ucs2hex_pull(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- while (*inbytesleft >= 1 && *outbytesleft >= 2) {
- unsigned v;
-
- if ((*inbuf)[0] != '@') {
- /* seven bit ascii case */
- (*outbuf)[0] = (*inbuf)[0];
- (*outbuf)[1] = 0;
- (*inbytesleft) -= 1;
- (*outbytesleft) -= 2;
- (*inbuf) += 1;
- (*outbuf) += 2;
- continue;
- }
- /* it's a hex character */
- if (*inbytesleft < 5) {
- errno = EINVAL;
- return -1;
- }
-
- if (sscanf(&(*inbuf)[1], "%04x", &v) != 1) {
- errno = EILSEQ;
- return -1;
- }
-
- (*outbuf)[0] = v&0xff;
- (*outbuf)[1] = v>>8;
- (*inbytesleft) -= 5;
- (*outbytesleft) -= 2;
- (*inbuf) += 5;
- (*outbuf) += 2;
- }
-
- if (*inbytesleft > 0) {
- errno = E2BIG;
- return -1;
- }
-
- return 0;
-}
-
-static size_t ucs2hex_push(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- while (*inbytesleft >= 2 && *outbytesleft >= 1) {
- char buf[6];
-
- if ((*inbuf)[1] == 0 &&
- ((*inbuf)[0] & 0x80) == 0 &&
- (*inbuf)[0] != '@') {
- (*outbuf)[0] = (*inbuf)[0];
- (*inbytesleft) -= 2;
- (*outbytesleft) -= 1;
- (*inbuf) += 2;
- (*outbuf) += 1;
- continue;
- }
- if (*outbytesleft < 5) {
- errno = E2BIG;
- return -1;
- }
- snprintf(buf, 6, "@%04x", SVAL(*inbuf, 0));
- memcpy(*outbuf, buf, 5);
- (*inbytesleft) -= 2;
- (*outbytesleft) -= 5;
- (*inbuf) += 2;
- (*outbuf) += 5;
- }
-
- if (*inbytesleft == 1) {
- errno = EINVAL;
- return -1;
- }
-
- if (*inbytesleft > 1) {
- errno = E2BIG;
- return -1;
- }
-
- return 0;
-}
-
-static size_t iconv_swab(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- int n;
-
- n = MIN(*inbytesleft, *outbytesleft);
-
- swab(*inbuf, *outbuf, (n&~1));
- if (n&1) {
- (*outbuf)[n-1] = 0;
- }
-
- (*inbytesleft) -= n;
- (*outbytesleft) -= n;
- (*inbuf) += n;
- (*outbuf) += n;
-
- if (*inbytesleft > 0) {
- errno = E2BIG;
- return -1;
- }
-
- return 0;
-}
-
-static size_t iconv_copy(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- int n;
-
- n = MIN(*inbytesleft, *outbytesleft);
-
- memmove(*outbuf, *inbuf, n);
-
- (*inbytesleft) -= n;
- (*outbytesleft) -= n;
- (*inbuf) += n;
- (*outbuf) += n;
-
- if (*inbytesleft > 0) {
- errno = E2BIG;
- return -1;
- }
-
- return 0;
-}
-
-static size_t utf8_pull(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- size_t in_left=*inbytesleft, out_left=*outbytesleft;
- const uint8 *c = (const uint8 *)*inbuf;
- uint8 *uc = (uint8 *)*outbuf;
-
- while (in_left >= 1 && out_left >= 2) {
- unsigned int codepoint;
-
- if ((c[0] & 0x80) == 0) {
- uc[0] = c[0];
- uc[1] = 0;
- c += 1;
- in_left -= 1;
- out_left -= 2;
- uc += 2;
- continue;
- }
-
- if ((c[0] & 0xe0) == 0xc0) {
- if (in_left < 2 ||
- (c[1] & 0xc0) != 0x80) {
- errno = EILSEQ;
- goto error;
- }
- codepoint = (c[1]&0x3f) | ((c[0]&0x1f)<<6);
- if (codepoint < 0x80) {
- /* don't accept UTF-8 characters that are not minimally packed */
- errno = EILSEQ;
- goto error;
- }
- uc[1] = codepoint >> 8;
- uc[0] = codepoint & 0xff;
- c += 2;
- in_left -= 2;
- out_left -= 2;
- uc += 2;
- continue;
- }
-
- if ((c[0] & 0xf0) == 0xe0) {
- if (in_left < 3 ||
- (c[1] & 0xc0) != 0x80 ||
- (c[2] & 0xc0) != 0x80) {
- errno = EILSEQ;
- goto error;
- }
- codepoint = (c[2]&0x3f) | ((c[1]&0x3f)<<6) | ((c[0]&0xf)<<12);
- if (codepoint < 0x800) {
- /* don't accept UTF-8 characters that are not minimally packed */
- errno = EILSEQ;
- goto error;
- }
- uc[1] = codepoint >> 8;
- uc[0] = codepoint & 0xff;
- c += 3;
- in_left -= 3;
- out_left -= 2;
- uc += 2;
- continue;
- }
-
- if ((c[0] & 0xf8) == 0xf0) {
- if (in_left < 4 ||
- (c[1] & 0xc0) != 0x80 ||
- (c[2] & 0xc0) != 0x80 ||
- (c[3] & 0xc0) != 0x80) {
- errno = EILSEQ;
- goto error;
- }
- codepoint =
- (c[3]&0x3f) |
- ((c[2]&0x3f)<<6) |
- ((c[1]&0x3f)<<12) |
- ((c[0]&0x7)<<18);
- if (codepoint < 0x10000 || codepoint > 0x10ffff) {
- /* don't accept UTF-8 characters that are not minimally packed */
- errno = EILSEQ;
- goto error;
- }
-
- codepoint -= 0x10000;
-
- if (out_left < 4) {
- errno = E2BIG;
- goto error;
- }
-
- uc[0] = (codepoint>>10) & 0xFF;
- uc[1] = (codepoint>>18) | 0xd8;
- uc[2] = codepoint & 0xFF;
- uc[3] = ((codepoint>>8) & 0x3) | 0xdc;
- c += 4;
- in_left -= 4;
- out_left -= 4;
- uc += 4;
- continue;
- }
-
- /* we don't handle 5 byte sequences */
- errno = EINVAL;
- goto error;
- }
-
- if (in_left > 0) {
- errno = E2BIG;
- goto error;
- }
-
- *inbytesleft = in_left;
- *outbytesleft = out_left;
- *inbuf = (char *)c;
- *outbuf = (char *)uc;
- return 0;
-
-error:
- *inbytesleft = in_left;
- *outbytesleft = out_left;
- *inbuf = (char *)c;
- *outbuf = (char *)uc;
- return -1;
-}
-
-static size_t utf8_push(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
-{
- size_t in_left=*inbytesleft, out_left=*outbytesleft;
- uint8 *c = (uint8 *)*outbuf;
- const uint8 *uc = (const uint8 *)*inbuf;
-
- while (in_left >= 2 && out_left >= 1) {
- unsigned int codepoint;
-
- if (uc[1] == 0 && !(uc[0] & 0x80)) {
- /* simplest case */
- c[0] = uc[0];
- in_left -= 2;
- out_left -= 1;
- uc += 2;
- c += 1;
- continue;
- }
-
- if ((uc[1]&0xf8) == 0) {
- /* next simplest case */
- if (out_left < 2) {
- errno = E2BIG;
- goto error;
- }
- c[0] = 0xc0 | (uc[0]>>6) | (uc[1]<<2);
- c[1] = 0x80 | (uc[0] & 0x3f);
- in_left -= 2;
- out_left -= 2;
- uc += 2;
- c += 2;
- continue;
- }
-
- if ((uc[1] & 0xfc) == 0xdc) {
- /* its the second part of a 4 byte sequence. Illegal */
- if (in_left < 4) {
- errno = EINVAL;
- } else {
- errno = EILSEQ;
- }
- goto error;
- }
-
- if ((uc[1] & 0xfc) != 0xd8) {
- codepoint = uc[0] | (uc[1]<<8);
- if (out_left < 3) {
- errno = E2BIG;
- goto error;
- }
- c[0] = 0xe0 | (codepoint >> 12);
- c[1] = 0x80 | ((codepoint >> 6) & 0x3f);
- c[2] = 0x80 | (codepoint & 0x3f);
-
- in_left -= 2;
- out_left -= 3;
- uc += 2;
- c += 3;
- continue;
- }
-
- /* its the first part of a 4 byte sequence */
- if (in_left < 4) {
- errno = EINVAL;
- goto error;
- }
- if ((uc[3] & 0xfc) != 0xdc) {
- errno = EILSEQ;
- goto error;
- }
- codepoint = 0x10000 + (uc[2] | ((uc[3] & 0x3)<<8) |
- (uc[0]<<10) | ((uc[1] & 0x3)<<18));
-
- if (out_left < 4) {
- errno = E2BIG;
- goto error;
- }
- c[0] = 0xf0 | (codepoint >> 18);
- c[1] = 0x80 | ((codepoint >> 12) & 0x3f);
- c[2] = 0x80 | ((codepoint >> 6) & 0x3f);
- c[3] = 0x80 | (codepoint & 0x3f);
-
- in_left -= 4;
- out_left -= 4;
- uc += 4;
- c += 4;
- }
-
- if (in_left == 1) {
- errno = EINVAL;
- goto error;
- }
-
- if (in_left > 1) {
- errno = E2BIG;
- goto error;
- }
-
- *inbytesleft = in_left;
- *outbytesleft = out_left;
- *inbuf = (char *)uc;
- *outbuf = (char *)c;
-
- return 0;
-
-error:
- *inbytesleft = in_left;
- *outbytesleft = out_left;
- *inbuf = (char *)uc;
- *outbuf = (char *)c;
- return -1;
-}
-
git.samba.org / abartlet / samba.git / .git / commitdiff