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/*
Simple test of build - writes 1k of RNG runs to stdout
gcc -o havege_sample -DUSE_SOURCE -I../../src -Wall havege_sample.c ../../src/.libs/libhavege.a
./havege_sample > /dev/null
After package is installed into test RAM disk /dev/shm/1
gcc -Wall -o havege_sample -I/dev/shm/1/include -L/dev/shm/1/lib havege_sample.c -lhavege
LD_LIBRARY_PATH=/dev/shm/1/lib ./havege_sample > /dev/shm/havege_random
*/
#include <stdio.h>
#ifdef USE_SOURCE
#include "havege.h"
#else
#include <haveged/havege.h>
#endif
int my_status_dump ( H_PTR h, char *buf, size_t buflen) {
H_SD_TOPIC topics[4] = {H_SD_TOPIC_BUILD, H_SD_TOPIC_TUNE, H_SD_TOPIC_TEST, H_SD_TOPIC_SUM};
int ret=0, i;
for(i=0;i<4 && ret<(buflen-2);i++) {
ret += havege_status_dump(h, topics[i], buf + ret, buflen-ret);
if (ret>(buflen-2))
break;
buf[ret++] = '\n';
}
return ret;
}
/**
* RNG output is written to stdout
*/
int main(void) {
int rc;
H_UINT* buf;
H_PARAMS havege_parameters={0};
H_PTR havege_state = NULL;
const int status_buf_size = 8192;
char status_buf[status_buf_size];
int i, size;
//havege_parameters.msg_out = print_msg;
fprintf(stderr, "library version is %s\n", havege_version(NULL));
havege_state = havege_create(&havege_parameters);
rc = havege_state==NULL? H_NOHANDLE : havege_state->error;
if (H_NOERR==rc) {
buf = havege_state->io_buf;
size = havege_state->i_readSz /sizeof(H_UINT);
fprintf(stderr, "havege_create: buffer size is %d\n", havege_state->i_readSz);
}
else {
if (H_NOTESTSPEC==rc)
fprintf(stderr, "ERROR: havege_create: unrecognized test setup: %s", havege_parameters.testSpec);
else fprintf(stderr, "ERROR: havege_create has returned %d\n",rc);
if (H_NOHANDLE!=rc)
havege_destroy(havage_state);
return 1;
}
rc = havege_run(havege_state);
if ( rc ) {
fprintf(stderr, "ERROR: havege_run has returned %d\n", havege_state->error);
havege_destroy(havege_state);
return 1;
}
if ( my_status_dump(havege_state, status_buf, status_buf_size) > 0 )
fprintf(stderr,"%s\n", status_buf);
for (i=0;i<1024;i++) {
rc = havege_rng(havege_state, buf, size);
if ( rc != (int) size ) {
fprintf(stderr, "ERROR: havege_rng has returned %d\n", havege_state->error);
havege_destroy(havege_state);
return 1;
}
rc = fwrite(buf, 1, size, stdout);
if ( rc < size ) {
fprintf(stderr, "ERROR: fwrite\n");
havege_destroy(havege_state);
return 1;
}
}
if ( my_status_dump(havege_state, status_buf, status_buf_size) > 0 )
fprintf(stderr,"%s\n", status_buf);
havege_destroy(havege_state);
return 0;
}