1 files changed, 103 insertions, 0 deletions
diff --git a/libdane/errors.c b/libdane/errors.c
new file mode 100644
index 0000000..35ae971
--- /dev/null
+++ b/libdane/errors.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2012 Free Software Foundation
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of libdane.
+ *
+ * libdane is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>
+ *
+ */
+
+#include <config.h>
+#include <gnutls/dane.h>
+
+/* I18n of error codes. */
+#include "gettext.h"
+#define _(String) dgettext (PACKAGE, String)
+#define N_(String) gettext_noop (String)
+
+#define ERROR_ENTRY(desc, name) \
+	{ desc, #name, name}
+
+struct error_entry {
+	const char *desc;
+	const char *_name;
+	int number;
+};
+typedef struct error_entry error_entry;
+
+static const error_entry error_algorithms[] = {
+	ERROR_ENTRY(N_("Success."), DANE_E_SUCCESS),
+	ERROR_ENTRY(N_("There was error initializing the DNS query."),
+		    DANE_E_INITIALIZATION_ERROR),
+	ERROR_ENTRY(N_("There was an error while resolving."),
+		    DANE_E_RESOLVING_ERROR),
+	ERROR_ENTRY(N_("No DANE data were found."),
+		    DANE_E_NO_DANE_DATA),
+	ERROR_ENTRY(N_("Unknown DANE data were found."),
+		    DANE_E_UNKNOWN_DANE_DATA),
+	ERROR_ENTRY(N_("No DNSSEC signature was found."),
+		    DANE_E_NO_DNSSEC_SIG),
+	ERROR_ENTRY(N_("Received corrupt data."),
+		    DANE_E_RECEIVED_CORRUPT_DATA),
+	ERROR_ENTRY(N_("The DNSSEC signature is invalid."),
+		    DANE_E_INVALID_DNSSEC_SIG),
+	ERROR_ENTRY(N_("There was a memory error."),
+		    DANE_E_MEMORY_ERROR),
+	ERROR_ENTRY(N_("The requested data are not available."),
+		    DANE_E_REQUESTED_DATA_NOT_AVAILABLE),
+	ERROR_ENTRY(N_("The request is invalid."),
+		    DANE_E_INVALID_REQUEST),
+	ERROR_ENTRY(N_("There was an error in the certificate."),
+		    DANE_E_CERT_ERROR),
+	ERROR_ENTRY(N_("There was an error in the public key."),
+		    DANE_E_PUBKEY_ERROR),
+	ERROR_ENTRY(N_("No certificate was found."),
+		    DANE_E_NO_CERT),
+	ERROR_ENTRY(N_("Error in file."),
+		    DANE_E_FILE_ERROR),
+	{NULL, NULL, 0}
+};
+
+/**
+ * dane_strerror:
+ * @error: is a DANE error code, a negative error code
+ *
+ * This function is similar to strerror.  The difference is that it
+ * accepts an error number returned by a gnutls function; In case of
+ * an unknown error a descriptive string is sent instead of %NULL.
+ *
+ * Error codes are always a negative error code.
+ *
+ * Returns: A string explaining the DANE error message.
+ **/
+const char *dane_strerror(int error)
+{
+	const char *ret = NULL;
+	const error_entry *p;
+
+	for (p = error_algorithms; p->desc != NULL; p++) {
+		if (p->number == error) {
+			ret = p->desc;
+			break;
+		}
+	}
+
+	/* avoid prefix */
+	if (ret == NULL)
+		return _("(unknown error code)");
+
+	return _(ret);
+}