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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// <sys/random.h> was only added as of glibc version 2.25.
// Don't try to compile this code on older glibc versions.
#include <sys/cdefs.h>
#if defined(__BIONIC__)
#define HAVE_SYS_RANDOM 1
#elif defined(__GLIBC_PREREQ)
#if __GLIBC_PREREQ(2, 25)
#define HAVE_SYS_RANDOM 1
#endif
#endif
#if defined(HAVE_SYS_RANDOM)
#include <sys/random.h>
#endif
#include <errno.h>
#include <gtest/gtest.h>
TEST(sys_random, getentropy) {
#if defined(HAVE_SYS_RANDOM)
char buf1[64];
char buf2[64];
ASSERT_EQ(0, getentropy(buf1, sizeof(buf1)));
ASSERT_EQ(0, getentropy(buf2, sizeof(buf2)));
ASSERT_TRUE(memcmp(buf1, buf2, sizeof(buf1)) != 0);
#else
GTEST_LOG_(INFO) << "This test requires a C library with <sys/random.h>.\n";
#endif
}
TEST(sys_random, getentropy_EFAULT) {
#if defined(HAVE_SYS_RANDOM)
errno = 0;
ASSERT_EQ(-1, getentropy(nullptr, 1));
ASSERT_EQ(EFAULT, errno);
#else
GTEST_LOG_(INFO) << "This test requires a C library with <sys/random.h>.\n";
#endif
}
TEST(sys_random, getentropy_EIO) {
#if defined(HAVE_SYS_RANDOM)
char buf[BUFSIZ];
static_assert(BUFSIZ > 256, "BUFSIZ <= 256!");
errno = 0;
ASSERT_EQ(-1, getentropy(buf, sizeof(buf)));
ASSERT_EQ(EIO, errno);
#else
GTEST_LOG_(INFO) << "This test requires a C library with <sys/random.h>.\n";
#endif
}
TEST(sys_random, getrandom) {
#if defined(HAVE_SYS_RANDOM)
char buf1[64];
char buf2[64];
ASSERT_EQ(64, getrandom(buf1, sizeof(buf1), 0));
ASSERT_EQ(64, getrandom(buf2, sizeof(buf2), 0));
ASSERT_TRUE(memcmp(buf1, buf2, sizeof(buf1)) != 0);
#else
GTEST_LOG_(INFO) << "This test requires a C library with <sys/random.h>.\n";
#endif
}
TEST(sys_random, getrandom_EFAULT) {
#if defined(HAVE_SYS_RANDOM)
errno = 0;
ASSERT_EQ(-1, getrandom(nullptr, 256, 0));
ASSERT_EQ(EFAULT, errno);
#else
GTEST_LOG_(INFO) << "This test requires a C library with <sys/random.h>.\n";
#endif
}
TEST(sys_random, getrandom_EINVAL) {
#if defined(HAVE_SYS_RANDOM)
errno = 0;
char buf[64];
ASSERT_EQ(-1, getrandom(buf, sizeof(buf), ~0));
ASSERT_EQ(EINVAL, errno);
#else
GTEST_LOG_(INFO) << "This test requires a C library with <sys/random.h>.\n";
#endif
}
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