1 files changed, 99 insertions, 0 deletions
diff --git a/lib/libssl/tls13_error.c b/lib/libssl/tls13_error.c
new file mode 100644
index 00000000000..295b6c4fab0
--- /dev/null
+++ b/lib/libssl/tls13_error.c
@@ -0,0 +1,99 @@
+/* $OpenBSD: tls13_error.c,v 1.1 2020/01/20 13:10:37 jsing Exp $ */
+/*
+ * Copyright (c) 2014,2019 Joel Sing <jsing@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <errno.h>
+
+#include "tls13_internal.h"
+
+void
+tls13_error_clear(struct tls13_error *error)
+{
+	error->code = 0;
+	error->subcode = 0;
+	error->errnum = 0;
+	error->file = NULL;
+	error->line = 0;
+	free(error->msg);
+	error->msg = NULL;
+}
+
+static int
+tls13_error_vset(struct tls13_error *error, int code, int subcode, int errnum,
+    const char *file, int line, const char *fmt, va_list ap)
+{
+	char *errmsg = NULL;
+	int rv = -1;
+
+	tls13_error_clear(error);
+
+	error->code = code;
+	error->subcode = subcode;
+	error->errnum = errnum;
+	error->file = file;
+	error->line = line;
+
+	if (vasprintf(&errmsg, fmt, ap) == -1) {
+		errmsg = NULL;
+		goto err;
+	}
+
+	if (errnum == -1) {
+		error->msg = errmsg;
+		return 0;
+	}
+
+	if (asprintf(&error->msg, "%s: %s", errmsg, strerror(errnum)) == -1) {
+		error->msg = NULL;
+		goto err;
+	}
+	rv = 0;
+
+ err:
+	free(errmsg);
+
+	return rv;
+}
+
+int
+tls13_error_set(struct tls13_error *error, int code, int subcode,
+    const char *file, int line, const char *fmt, ...)
+{
+	va_list ap;
+	int errnum, rv;
+
+	errnum = errno;
+
+	va_start(ap, fmt);
+	rv = tls13_error_vset(error, code, subcode, errnum, file, line, fmt, ap);
+	va_end(ap);
+
+	return (rv);
+}
+
+int
+tls13_error_setx(struct tls13_error *error, int code, int subcode,
+    const char *file, int line, const char *fmt, ...)
+{
+	va_list ap;
+	int rv;
+
+	va_start(ap, fmt);
+	rv = tls13_error_vset(error, code, subcode, -1, file, line, fmt, ap);
+	va_end(ap);
+
+	return (rv);
+}