summaryrefslogtreecommitdiffstats
path: root/src/libdnssec/binary.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/libdnssec/binary.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/src/libdnssec/binary.c b/src/libdnssec/binary.c
new file mode 100644
index 0000000..a57b421
--- /dev/null
+++ b/src/libdnssec/binary.c
@@ -0,0 +1,169 @@
+/* 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;
+}