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/*
* Copyright (C) 2010-2016 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
#include <config.h>
#include <system.h>
#include "gnutls_int.h"
#include "errors.h"
#include <sys/socket.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <c-ctype.h>
#if defined(_WIN32)
#include <windows.h>
#include <winnls.h>
int _gnutls_ucs2_to_utf8(const void *data, size_t size,
gnutls_datum_t * output, unsigned be)
{
int ret;
unsigned i;
int len = 0, src_len;
char *dst = NULL;
char *src = NULL;
static unsigned flags = 0;
static int checked = 0;
if (checked == 0) {
/* Not all windows versions support MB_ERR_INVALID_CHARS */
ret =
WideCharToMultiByte(CP_UTF8, MB_ERR_INVALID_CHARS,
L"hello", -1, NULL, 0, NULL, NULL);
if (ret > 0)
flags = MB_ERR_INVALID_CHARS;
checked = 1;
}
if (((uint8_t *) data)[size] == 0 && ((uint8_t *) data)[size+1] == 0) {
size -= 2;
}
src_len = wcslen(data);
src = gnutls_malloc(size+2);
if (src == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
/* convert to LE */
if (be) {
for (i = 0; i < size; i += 2) {
src[i] = ((uint8_t *) data)[1 + i];
src[1 + i] = ((uint8_t *) data)[i];
}
} else {
memcpy(src, data, size);
}
src[size] = 0;
src[size+1] = 0;
ret =
WideCharToMultiByte(CP_UTF8, flags,
(void *) src, src_len, NULL, 0,
NULL, NULL);
if (ret == 0) {
_gnutls_debug_log("WideCharToMultiByte: %d\n", (int)GetLastError());
ret = gnutls_assert_val(GNUTLS_E_PARSING_ERROR);
goto fail;
}
len = ret + 1;
dst = gnutls_malloc(len);
if (dst == NULL) {
ret = gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
goto fail;
}
dst[0] = 0;
ret =
WideCharToMultiByte(CP_UTF8, flags,
(void *) src, src_len, dst, len-1, NULL,
NULL);
if (ret == 0) {
ret = gnutls_assert_val(GNUTLS_E_PARSING_ERROR);
goto fail;
}
dst[len - 1] = 0;
output->data = dst;
output->size = ret;
ret = 0;
goto cleanup;
fail:
gnutls_free(dst);
cleanup:
gnutls_free(src);
return ret;
}
#elif defined(HAVE_ICONV) || defined(HAVE_LIBICONV)
#include <iconv.h>
int _gnutls_ucs2_to_utf8(const void *data, size_t size,
gnutls_datum_t * output, unsigned be)
{
iconv_t conv;
int ret;
size_t orig, dstlen = size * 2;
char *src = (void *) data;
char *dst = NULL, *pdst;
if (size == 0)
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
if (be) {
conv = iconv_open("UTF-8", "UTF-16BE");
} else {
conv = iconv_open("UTF-8", "UTF-16LE");
}
if (conv == (iconv_t) - 1)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
/* Note that dstlen has enough size for every possible input characters.
* (remember the in UTF-16 the characters in data are at most size/2,
* and we allocate 4 bytes per character).
*/
pdst = dst = gnutls_malloc(dstlen + 1);
if (dst == NULL) {
ret = gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
goto fail;
}
orig = dstlen;
ret = iconv(conv, &src, &size, &pdst, &dstlen);
if (ret == -1) {
ret = gnutls_assert_val(GNUTLS_E_PARSING_ERROR);
goto fail;
}
output->data = (void *) dst;
output->size = orig - dstlen;
output->data[output->size] = 0;
ret = 0;
goto cleanup;
fail:
gnutls_free(dst);
cleanup:
iconv_close(conv);
return ret;
}
#else
/* Can convert only english (ASCII) */
int _gnutls_ucs2_to_utf8(const void *data, size_t size,
gnutls_datum_t * output, unsigned be)
{
unsigned int i, j;
char *dst;
const char *src = data;
if (size == 0 || size % 2 != 0)
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
dst = gnutls_malloc(size + 1);
if (dst == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
for (i = j = 0; i < size; i += 2, j++) {
if (src[i] != 0 || !c_isascii(src[i + 1]))
return gnutls_assert_val(GNUTLS_E_PARSING_ERROR);
if (be)
dst[j] = src[i + 1];
else
dst[j] = src[i];
}
output->data = (void *) dst;
output->size = j;
output->data[output->size] = 0;
return 0;
}
#endif
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