Add initial regress test framework

Add a test framework for use in LibreSSL regression tests. This test
framework aims to be as lightweight and as simple to use as possible.

The design is mostly inspired by Go's test system, and aims to be a
drop-in utility in most existing regress tests.

ok jsing tb beck

1 files changed, 51 insertions, 0 deletions

diff --git a/src/regress/lib/libcrypto/test/test_util.c b/src/regress/lib/libcrypto/test/test_util.c
new file mode 100644
index 0000000000..6ecb574788
--- /dev/null
+++ b/src/regress/lib/libcrypto/test/test_util.c
@@ -0,0 +1,51 @@
+/*      $OpenBSD: test_util.c,v 1.1 2025/05/21 08:57:13 joshua Exp $ */
+/*
+ * Copyright (c) 2017 Joel Sing <jsing@openbsd.org>
+ * Copyright (c) 2024 Theo Buehler <tb@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 <stdio.h>
+#include <stdint.h>
+
+#include "test.h"
+
+void
+test_hexdump(struct test *t, const unsigned char *buf, size_t len)
+{
+        size_t i;
+
+        for (i = 1; i <= len; i++)
+                test_printf(t, " 0x%02x,%s", buf[i - 1], i % 8 ? "" : "\n");
+
+        if ((len % 8) != 0)
+                test_printf(t, "\n");
+}
+
+void
+test_hexdiff(struct test *t, const uint8_t *buf, size_t len, const uint8_t *compare)
+{
+        const char *mark = "", *newline;
+        size_t i;
+
+        for (i = 1; i <= len; i++) {
+                if (compare != NULL)
+                        mark = (buf[i - 1] != compare[i - 1]) ? "*" : " ";
+                newline = i % 8 ? "" : "\n";
+                test_printf(t, " %s0x%02x,%s", mark, buf[i - 1], newline);
+        }
+
+        if ((len % 8) != 0)
+                test_printf(t, "\n");
+}