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/*
* Copyright (C) 2016 Red Hat, 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 "gnutls_int.h"
#include "errors.h"
#include "str.h"
#if defined(HAVE_LIBUNISTRING)
#include <uninorm.h>
#include <unistr.h>
#include <unictype.h>
uint8_t *_gnutls_normalize_u8_password(const uint8_t *password)
{
size_t plen = strlen((char*)password);
size_t ucs4_size = 0, nrm_size = 0;
size_t out_size = 0;
uint8_t *out = NULL;
uint32_t *ucs4 = NULL;
uint32_t *nrm = NULL;
uint8_t *nrmu8 = NULL;
unsigned i;
if (plen == 0) {
return (uint8_t*)strdup("");
}
/* check for invalid UTF-8 */
if (u8_check((uint8_t*)password, plen) != NULL) {
gnutls_assert();
return NULL;
}
/* convert to UTF-32 */
ucs4 = u8_to_u32((uint8_t*)password, plen, NULL, &ucs4_size);
if (ucs4 == NULL) {
gnutls_assert();
goto fail;
}
/* convert all spaces to the ASCII-space */
for (i=0;i<ucs4_size;i++) {
if (uc_is_general_category(ucs4[i], UC_CATEGORY_Zs)) {
ucs4[i] = 0x20;
}
}
/* normalize to NFC */
nrm = u32_normalize(UNINORM_NFC, ucs4, ucs4_size, NULL, &nrm_size);
if (nrm == NULL) {
gnutls_assert();
goto fail;
}
/* convert back to UTF-8 */
out_size = 0;
nrmu8 = u32_to_u8(nrm, nrm_size, NULL, &out_size);
if (nrmu8 == NULL) {
gnutls_assert();
goto fail;
}
/* copy to output with null terminator */
out = gnutls_malloc(out_size+1);
if (out == NULL) {
gnutls_assert();
goto fail;
}
memcpy(out, nrmu8, out_size);
out[out_size] = 0;
gnutls_free(ucs4);
gnutls_free(nrm);
gnutls_free(nrmu8);
return out;
fail:
gnutls_free(out);
gnutls_free(ucs4);
gnutls_free(nrm);
gnutls_free(nrmu8);
return NULL;
}
uint8_t *_gnutls_normalize_u8_nfc(const uint8_t *str, size_t str_size)
{
size_t nrm_size = 0;
size_t out_size = 0;
uint8_t *out = NULL;
uint8_t *nrm = NULL;
if (str_size == 0) {
return (uint8_t*)strdup("");
}
/* check for invalid UTF-8 */
if (u8_check(str, str_size) != NULL) {
gnutls_assert();
return NULL;
}
/* normalize to NFC */
nrm = u8_normalize(UNINORM_NFC, str, str_size, NULL, &nrm_size);
if (nrm == NULL) {
gnutls_assert();
goto fail;
}
out_size = nrm_size;
/* copy to output with null terminator */
out = gnutls_malloc(out_size+1);
if (out == NULL) {
gnutls_assert();
goto fail;
}
memcpy(out, nrm, out_size);
out[out_size] = 0;
gnutls_free(nrm);
return out;
fail:
gnutls_free(out);
gnutls_free(nrm);
return NULL;
}
#endif
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