1 files changed, 87 insertions, 0 deletions
diff --git a/src/libdnssec/error.c b/src/libdnssec/error.c
new file mode 100644
index 0000000..d4f9a81
--- /dev/null
+++ b/src/libdnssec/error.c
@@ -0,0 +1,87 @@
+/*  Copyright (C) 2021 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 <string.h>
+
+#include "libdnssec/error.h"
+#include "libdnssec/shared/shared.h"
+
+typedef struct error_message_t {
+	int code;
+	const char *text;
+} error_message_t;
+
+static const error_message_t ERROR_MESSAGES[] = {
+	{ DNSSEC_EOK,			"no error" },
+
+	{ DNSSEC_ENOMEM,		"not enough memory" },
+	{ DNSSEC_EINVAL,		"invalid argument" },
+	{ DNSSEC_ENOENT,		"no such file or directory" },
+
+	{ DNSSEC_ERROR,			"unspecified error" },
+	{ DNSSEC_NOT_IMPLEMENTED_ERROR,	"not implemented" },
+	{ DNSSEC_MALFORMED_DATA,	"malformed data" },
+	{ DNSSEC_NOT_FOUND,		"not found" },
+
+	{ DNSSEC_PKCS8_IMPORT_ERROR,	"PKCS #8 import error" },
+	{ DNSSEC_KEY_EXPORT_ERROR,	"key export error" },
+	{ DNSSEC_KEY_IMPORT_ERROR,	"key import error" },
+	{ DNSSEC_KEY_GENERATE_ERROR,	"key generation error" },
+
+	{ DNSSEC_INVALID_PUBLIC_KEY,	"invalid public key" },
+	{ DNSSEC_INVALID_PRIVATE_KEY,	"invalid private key" },
+	{ DNSSEC_INVALID_KEY_ALGORITHM,	"invalid key algorithm" },
+	{ DNSSEC_INVALID_KEY_SIZE,	"invalid key size" },
+	{ DNSSEC_INVALID_KEY_ID,	"invalid key ID" },
+	{ DNSSEC_INVALID_KEY_NAME,	"invalid key name" },
+
+	{ DNSSEC_NO_PUBLIC_KEY,		"no public key" },
+	{ DNSSEC_NO_PRIVATE_KEY,	"no private key" },
+	{ DNSSEC_KEY_ALREADY_PRESENT,	"key already present" },
+
+	{ DNSSEC_SIGN_INIT_ERROR,	"signing initialization error" },
+	{ DNSSEC_SIGN_ERROR,		"signing error" },
+	{ DNSSEC_INVALID_SIGNATURE,	"invalid signature" },
+
+	{ DNSSEC_INVALID_NSEC3_ALGORITHM, "invalid NSEC3 algorithm" },
+	{ DNSSEC_NSEC3_HASHING_ERROR,	"NSEC3 hashing error" },
+
+	{ DNSSEC_INVALID_DS_ALGORITHM,	"invalid DS algorithm" },
+	{ DNSSEC_DS_HASHING_ERROR,	"DS hashing error" },
+
+	{ DNSSEC_KEYSTORE_INVALID_CONFIG,  "invalid KASP keystore configuration" },
+
+	{ DNSSEC_P11_FAILED_TO_LOAD_MODULE, "failed to load PKCS #11 module" },
+	{ DNSSEC_P11_TOO_MANY_MODULES,      "too many PKCS #11 modules loaded" },
+	{ DNSSEC_P11_TOKEN_NOT_AVAILABLE,   "PKCS #11 token not available" },
+
+	{ DNSSEC_INVALID_DIGEST_ALGORITHM,  "invalid digest algorithm" },
+	{ DNSSEC_DIGEST_ERROR,              "digest error" },
+
+	{ 0 }
+};
+
+_public_
+const char *dnssec_strerror(int error)
+{
+	for (const error_message_t *m = ERROR_MESSAGES; m->text; m++) {
+		if (m->code == error) {
+			return m->text;
+		}
+	}
+
+	return NULL;
+}