1 files changed, 163 insertions, 0 deletions
diff --git a/src/libdnssec/binary.c b/src/libdnssec/binary.c
new file mode 100644
index 0000000..59153f3
--- /dev/null
+++ b/src/libdnssec/binary.c
@@ -0,0 +1,163 @@
+/*  Copyright (C) 2020 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <string.h>
+
+#include "contrib/base64.h"
+#include "libdnssec/binary.h"
+#include "libdnssec/error.h"
+#include "libdnssec/shared/shared.h"
+
+/* -- 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 = knot_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 = knot_base64_encode_alloc(binary->data, binary->size, &data);
+	if (size < 0) {
+		return DNSSEC_EINVAL;
+	}
+
+	base64->data = data;
+	base64->size = size;
+
+	return DNSSEC_EOK;
+}