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6dced2c635
Apply the following automated changes to try to eliminate no-longer-needed sys/cdefs.h includes as well as now-empty blank lines in a row. Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/ Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/ Remove /\n+#if.*\n#endif.*\n+/ Remove /^#if.*\n#endif.*\n/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/ Sponsored by: Netflix
128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2018 Conrad Meyer <cem@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/random.h>
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#include <errno.h>
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#include <atf-c.h>
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#include <zstd.h>
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static const unsigned valid_flags[] = { 0, GRND_NONBLOCK, GRND_RANDOM,
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GRND_NONBLOCK | GRND_RANDOM };
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ATF_TC_WITHOUT_HEAD(getrandom_randomness);
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ATF_TC_BODY(getrandom_randomness, tc)
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{
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char randomb[4096], compressed[5000];
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ssize_t ret;
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size_t i, j, c;
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unsigned mode;
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for (i = 0; i < nitems(valid_flags); i++) {
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mode = valid_flags[i];
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/* Get new random data, filling randomb. */
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memset(randomb, 0, sizeof(randomb));
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for (j = 0; j < sizeof(randomb);) {
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ret = getrandom(&randomb[j], sizeof(randomb) - j, mode);
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if (ret < 0 && (mode & GRND_NONBLOCK) != 0 &&
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errno == EAGAIN)
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continue;
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ATF_REQUIRE_MSG(ret >= 0, "other error: %d", errno);
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ATF_REQUIRE_MSG(ret > 0, "bogus zero return");
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j += (size_t)ret;
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}
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/* Perform compressibility test */
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c = ZSTD_compress(compressed, sizeof(compressed), randomb,
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sizeof(randomb), ZSTD_maxCLevel());
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ATF_REQUIRE_MSG(!ZSTD_isError(c), "zstd compress: %s",
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ZSTD_getErrorName(c));
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/*
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* If the output is very compressible, it's probably not random
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*/
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ATF_REQUIRE_MSG(c > (sizeof(randomb) * 4 / 5),
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"purportedly random data was compressible: %zu/%zu or %f%%",
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c, sizeof(randomb), (double)c / (double)sizeof(randomb));
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}
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}
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ATF_TC_WITHOUT_HEAD(getrandom_fault);
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ATF_TC_BODY(getrandom_fault, tc)
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{
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ssize_t ret;
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ret = getrandom(NULL, 1, 0);
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ATF_REQUIRE_EQ(ret, -1);
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ATF_REQUIRE_EQ(errno, EFAULT);
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}
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ATF_TC_WITHOUT_HEAD(getrandom_count);
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ATF_TC_BODY(getrandom_count, tc)
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{
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char buf[4096], reference[4096];
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ssize_t ret;
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/* getrandom(2) does not modify buf past the requested length */
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_Static_assert(sizeof(reference) == sizeof(buf), "must match");
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memset(reference, 0x7C, sizeof(reference));
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memset(buf, 0x7C, sizeof(buf));
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ret = getrandom(buf, 1, 0);
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ATF_REQUIRE_EQ(ret, 1);
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ATF_REQUIRE_EQ(memcmp(&buf[1], reference, sizeof(reference) - 1), 0);
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memset(buf, 0x7C, sizeof(buf));
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ATF_REQUIRE_EQ(getrandom(buf, 15, 0), 15);
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ATF_REQUIRE_EQ(memcmp(&buf[15], reference, sizeof(reference) - 15), 0);
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memset(buf, 0x7C, sizeof(buf));
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ATF_REQUIRE_EQ(getrandom(buf, 255, 0), 255);
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ATF_REQUIRE_EQ(memcmp(&buf[255], reference, sizeof(reference) - 255), 0);
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memset(buf, 0x7C, sizeof(buf));
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ATF_REQUIRE_EQ(getrandom(buf, 4095, 0), 4095);
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ATF_REQUIRE_EQ(memcmp(&buf[4095], reference, sizeof(reference) - 4095), 0);
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, getrandom_count);
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ATF_TP_ADD_TC(tp, getrandom_fault);
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ATF_TP_ADD_TC(tp, getrandom_randomness);
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return (atf_no_error());
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}
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