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-rw-r--r--src/libdnssec/keyid.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/src/libdnssec/keyid.c b/src/libdnssec/keyid.c
new file mode 100644
index 0000000..5a6f29d
--- /dev/null
+++ b/src/libdnssec/keyid.c
@@ -0,0 +1,87 @@
+/* Copyright (C) 2019 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 "libdnssec/error.h"
+#include "libdnssec/keyid.h"
+#include "libdnssec/shared/shared.h"
+
+#include "contrib/ctype.h"
+#include "contrib/tolower.h"
+
+/* -- public API ----------------------------------------------------------- */
+
+_public_
+bool dnssec_keyid_is_valid(const char *id)
+{
+ if (!id) {
+ return false;
+ }
+
+ if (strlen(id) % 2 != 0) {
+ return false;
+ }
+
+ for (int i = 0; id[i] != '\0'; i++) {
+ if (!is_xdigit(id[i])) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+_public_
+void dnssec_keyid_normalize(char *id)
+{
+ if (!id) {
+ return;
+ }
+
+ for (size_t i = 0; id[i] != '\0'; i++) {
+ assert(id[i] != '\0' && is_xdigit(id[i]));
+ id[i] = knot_tolower(id[i]);
+ }
+}
+
+_public_
+char *dnssec_keyid_copy(const char *id)
+{
+ if (!id) {
+ return NULL;
+ }
+
+ char *copy = strdup(id);
+ if (!copy) {
+ return NULL;
+ }
+
+ dnssec_keyid_normalize(copy);
+
+ return copy;
+}
+
+_public_
+bool dnssec_keyid_equal(const char *one, const char *two)
+{
+ if (!one || !two) {
+ return NULL;
+ }
+
+ return (strcasecmp(one, two) == 0);
+}