diff options
Diffstat (limited to '')
| -rw-r--r-- | lib/str-iconv.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/lib/str-iconv.c b/lib/str-iconv.c new file mode 100644 index 0000000..7786dc8 --- /dev/null +++ b/lib/str-iconv.c @@ -0,0 +1,171 @@ +/* + * Copyright (C) 2010-2016 Free Software Foundation, Inc. + * Copyright (C) 2015-2016 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 <https://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 <unistr.h> +#include <uninorm.h> +#include "num.h" + +static void change_u16_endianness(uint8_t *dst, const uint8_t *src, unsigned size, unsigned be) +{ + unsigned convert = 0; + unsigned i; + uint8_t tmp; + +#ifdef WORDS_BIGENDIAN + if (!be) + convert = 1; +#else + if (be) + convert = 1; +#endif + + /* convert to LE */ + if (convert) { + for (i = 0; i < size; i += 2) { + tmp = src[i]; + dst[i] = src[1 + i]; + dst[1 + i] = tmp; + } + } else { + if (dst != src) + memcpy(dst, src, size); + } +} + +int _gnutls_ucs2_to_utf8(const void *data, size_t size, + gnutls_datum_t * output, unsigned be) +{ + int ret; + size_t dstlen; + void *src; + uint8_t *tmp_dst = NULL; + uint8_t *dst = NULL; + + if (size > 2 && ((uint8_t *) data)[size-1] == 0 && ((uint8_t *) data)[size-2] == 0) { + size -= 2; + } + + if (size == 0) + return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST); + + src = gnutls_malloc(size+2); + if (src == NULL) + return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR); + + /* convert to LE if needed */ + change_u16_endianness(src, data, size, be); + + dstlen = 0; + tmp_dst = u16_to_u8((uint16_t*)src, size/2, NULL, &dstlen); + if (tmp_dst == NULL) { + ret = gnutls_assert_val(GNUTLS_E_MEMORY_ERROR); + goto fail; + } + + dst = gnutls_malloc(dstlen+1); + if (dst == NULL) { + gnutls_assert(); + ret = GNUTLS_E_MEMORY_ERROR; + goto fail; + } + + memcpy(dst, tmp_dst, dstlen); + dst[dstlen] = 0; + + output->data = (void *) dst; + output->size = dstlen; + + ret = 0; + goto cleanup; + + fail: + gnutls_free(dst); + + cleanup: + gnutls_free(src); + free(tmp_dst); + + return ret; +} + +int _gnutls_utf8_to_ucs2(const void *data, size_t size, + gnutls_datum_t * output, unsigned be) +{ + int ret; + size_t dstlen, nrm_size = 0, tmp_size = 0; + uint16_t *tmp_dst = NULL; + uint16_t *nrm_dst = NULL; + uint8_t *dst = NULL; + + if (size == 0) + return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST); + + tmp_dst = u8_to_u16(data, size, NULL, &tmp_size); + if (tmp_dst == NULL) + return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR); + + nrm_dst = u16_normalize(UNINORM_NFC, tmp_dst, tmp_size, NULL, &nrm_size); + if (nrm_dst == NULL) { + ret = gnutls_assert_val(GNUTLS_E_MEMORY_ERROR); + goto fail; + } + + dstlen = nrm_size * 2; /* convert to bytes */ + + dst = gnutls_malloc(dstlen+2); + if (dst == NULL) { + gnutls_assert(); + ret = GNUTLS_E_MEMORY_ERROR; + goto fail; + } + + /* convert to BE */ + change_u16_endianness(dst, (uint8_t*)tmp_dst, dstlen, be); + dst[dstlen] = 0; + dst[dstlen+1] = 0; + + output->data = (void *) dst; + output->size = dstlen; + + ret = 0; + goto cleanup; + + fail: + gnutls_free(dst); + + cleanup: + free(tmp_dst); + free(nrm_dst); + + return ret; +} + |