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/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
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 <assert.h>
#include <string.h>
#include "libdnssec/binary.h"
#include "libdnssec/error.h"
#include "libdnssec/shared/shared.h"
// Workaround for symbol redefinition if linked statically.
#define base64_encode base64encode
#define base64_decode base64decode
#define base64_encode_alloc base64encodealloc
#define base64_decode_alloc base64decodealloc
#include "contrib/base64.c"
/* -- public API ----------------------------------------------------------- */
_public_
int dnssec_binary_alloc(dnssec_binary_t *data, size_t size)
{
if (!data || size == 0) {
return DNSSEC_EINVAL;
}
uint8_t *new_data = calloc(1, size);
if (!new_data) {
return DNSSEC_ENOMEM;
}
data->data = new_data;
data->size = size;
return DNSSEC_EOK;
}
_public_
void dnssec_binary_free(dnssec_binary_t *binary)
{
if (!binary) {
return;
}
free(binary->data);
clear_struct(binary);
}
_public_
int dnssec_binary_dup(const dnssec_binary_t *from, dnssec_binary_t *to)
{
if (!from || !to) {
return DNSSEC_EINVAL;
}
uint8_t *copy = malloc(from->size);
if (copy == NULL) {
return DNSSEC_ENOMEM;
}
memmove(copy, from->data, from->size);
to->size = from->size;
to->data = copy;
return DNSSEC_EOK;
}
_public_
int dnssec_binary_resize(dnssec_binary_t *data, size_t new_size)
{
if (!data) {
return DNSSEC_EINVAL;
}
uint8_t *new_data = realloc(data->data, new_size);
if (new_size > 0 && new_data == NULL) {
return DNSSEC_ENOMEM;
}
data->data = new_data;
data->size = new_size;
return DNSSEC_EOK;
}
_public_
int dnssec_binary_cmp(const dnssec_binary_t *one, const dnssec_binary_t *two)
{
if (one == two) {
return 0;
}
uint8_t *data_one = one && one->size > 0 ? one->data : NULL;
uint8_t *data_two = two && two->size > 0 ? two->data : NULL;
if (data_one == data_two) {
return 0;
} else if (data_one == NULL) {
return -1;
} else if (data_two == NULL) {
return +1;
}
size_t min_size = one->size <= two->size ? one->size : two->size;
int cmp = memcmp(data_one, data_two, min_size);
if (cmp != 0) {
return cmp;
} else if (one->size == two->size) {
return 0;
} else if (one->size < two->size) {
return -1;
} else {
return +1;
}
}
_public_
int dnssec_binary_from_base64(const dnssec_binary_t *base64,
dnssec_binary_t *binary)
{
if (!base64 || !binary) {
return DNSSEC_EINVAL;
}
uint8_t *data;
int32_t size = base64_decode_alloc(base64->data, base64->size, &data);
if (size < 0) {
return DNSSEC_EINVAL;
}
binary->data = data;
binary->size = size;
return DNSSEC_EOK;
}
_public_
int dnssec_binary_to_base64(const dnssec_binary_t *binary,
dnssec_binary_t *base64)
{
if (!binary || !base64) {
return DNSSEC_EINVAL;
}
uint8_t *data;
int32_t size = base64_encode_alloc(binary->data, binary->size, &data);
if (size < 0) {
return DNSSEC_EINVAL;
}
base64->data = data;
base64->size = size;
return DNSSEC_EOK;
}
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