33dbab6fde
Rename rdrand64 to rdrand, and switch from uint64_t to unsigned long. This produces code that will compile/assemble on both x86-64 and x86-32. This could be useful when running a 32-bit copy of systemd on a modern Intel processor. RDRAND is inherently arch-specific, so relying on the compiler-defined 'long' type seems reasonable.
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "hexdecoct.h"
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#include "random-util.h"
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#include "log.h"
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#include "tests.h"
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static void test_genuine_random_bytes(RandomFlags flags) {
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uint8_t buf[16] = {};
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unsigned i;
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log_info("/* %s */", __func__);
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for (i = 1; i < sizeof buf; i++) {
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assert_se(genuine_random_bytes(buf, i, flags) == 0);
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if (i + 1 < sizeof buf)
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assert_se(buf[i] == 0);
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hexdump(stdout, buf, i);
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}
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}
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static void test_pseudo_random_bytes(void) {
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uint8_t buf[16] = {};
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unsigned i;
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log_info("/* %s */", __func__);
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for (i = 1; i < sizeof buf; i++) {
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pseudo_random_bytes(buf, i);
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if (i + 1 < sizeof buf)
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assert_se(buf[i] == 0);
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hexdump(stdout, buf, i);
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}
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}
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static void test_rdrand(void) {
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int r, i;
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for (i = 0; i < 10; i++) {
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unsigned long x = 0;
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r = rdrand(&x);
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if (r < 0) {
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log_error_errno(r, "RDRAND failed: %m");
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return;
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}
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printf("%lx\n", x);
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}
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}
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int main(int argc, char **argv) {
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test_setup_logging(LOG_DEBUG);
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test_genuine_random_bytes(RANDOM_EXTEND_WITH_PSEUDO);
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test_genuine_random_bytes(0);
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test_genuine_random_bytes(RANDOM_BLOCK);
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test_genuine_random_bytes(RANDOM_ALLOW_RDRAND);
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test_pseudo_random_bytes();
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test_rdrand();
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return 0;
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}
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