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/* SPDX-License-Identifier: BSD-3-Clause */
#include <openssl/provider.h>
#include <openssl/rand.h>
#include <unistd.h>
#include <sys/wait.h>
#define PROCESS_COUNT 10
int generate_random() {
unsigned char buffer[1024];
/* 1 on success */
return (RAND_bytes(buffer, sizeof(buffer)) == 1);
}
int main() {
OSSL_PROVIDER *prov;
pid_t process[PROCESS_COUNT];
int i, failed = 0;
int res;
if ((prov = OSSL_PROVIDER_load(NULL, "tpm2")) == NULL)
return PROCESS_COUNT+1;
/* start multiple parallel operations */
for (i = 0; i < PROCESS_COUNT; i++) {
process[i] = fork();
if (process[i] < 0) {
/* failure */
return PROCESS_COUNT+2;
} else if (process[i] == 0) {
/* child process */
return generate_random();
}
}
/* count failures */
for (i = 0; i < PROCESS_COUNT; i++) {
if (waitpid(process[i], &res, 0) != process[i] || !res)
failed++;
}
if (!OSSL_PROVIDER_unload(prov))
return PROCESS_COUNT+3;
return failed;
}
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