1 files changed, 85 insertions, 0 deletions
diff --git a/lib/libc/tests/gen/getentropy_test.c b/lib/libc/tests/gen/getentropy_test.c
new file mode 100644
index 000000000000..6ac9d5678ea6
--- /dev/null
+++ b/lib/libc/tests/gen/getentropy_test.c
@@ -0,0 +1,85 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2018 Conrad Meyer <cem@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include <atf-c.h>
+
+ATF_TC_WITHOUT_HEAD(getentropy_count);
+ATF_TC_BODY(getentropy_count, tc)
+{
+	char buf[2];
+	int ret;
+
+	/* getentropy(2) does not modify buf past the requested length */
+	buf[1] = 0x7C;
+	ret = getentropy(buf, 1);
+	ATF_REQUIRE_EQ(ret, 0);
+	ATF_REQUIRE_EQ(buf[1], 0x7C);
+}
+
+ATF_TC_WITHOUT_HEAD(getentropy_fault);
+ATF_TC_BODY(getentropy_fault, tc)
+{
+	int ret;
+
+	ret = getentropy(NULL, 1);
+	ATF_REQUIRE_EQ(ret, -1);
+	ATF_REQUIRE_EQ(errno, EFAULT);
+}
+
+ATF_TC_WITHOUT_HEAD(getentropy_sizes);
+ATF_TC_BODY(getentropy_sizes, tc)
+{
+	char buf[512];
+
+	ATF_REQUIRE_EQ(getentropy(buf, sizeof(buf)), -1);
+	ATF_REQUIRE_EQ(errno, EINVAL);
+	ATF_REQUIRE_EQ(getentropy(buf, GETENTROPY_MAX + 1), -1);
+	ATF_REQUIRE_EQ(errno, EINVAL);
+
+	/* Smaller sizes always succeed: */
+	ATF_REQUIRE_EQ(getentropy(buf, GETENTROPY_MAX), 0);
+	ATF_REQUIRE_EQ(getentropy(buf, GETENTROPY_MAX / 2), 0);
+	ATF_REQUIRE_EQ(getentropy(buf, 0), 0);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+	signal(SIGSYS, SIG_IGN);
+
+	ATF_TP_ADD_TC(tp, getentropy_count);
+	ATF_TP_ADD_TC(tp, getentropy_fault);
+	ATF_TP_ADD_TC(tp, getentropy_sizes);
+	return (atf_no_error());
+}