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/* rdd - random data dump */
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include "sosemanuk.h"
#define fail(i,s) write(2, s, (sizeof s)-1), exit(i);
int
main(int argc, char *argv[])
{
unsigned char key[32], iv[16], buf[120*512];
sosemanuk_key_context kc;
sosemanuk_run_context rc;
int fd, c, i, v=0, r=4;
char *src = "/dev/urandom";
while ((c = getopt(argc, argv, "i:r:v")) != -1)
switch(c) {
case 'i': src = optarg; break;
case 'r': r = atoi(optarg); break;
case 'v': v = 1; break;
default:
usage:
fail(1, "Usage: rdd [-i RANDOMSOURCE] [-r REKEYMB] [-v]\n");
}
if (argc > optind)
goto usage;
if ((fd = open(src, O_RDONLY)) < 0)
fail(2, "failed to open random source\n");
if (read(fd, key, sizeof key) != sizeof key)
fail(3, "failed to read key from random source\n");
sosemanuk_schedule(&kc, key, sizeof key);
while (1) {
if (read(fd, iv, sizeof iv) != sizeof iv)
fail(3, "failed to read iv from random source\n");
sosemanuk_init(&rc, &kc, iv, sizeof iv);
if (v)
write(2, ".", 1);
for (i = 0; r<0 || i<r*1024*1024; i+=sizeof buf) {
sosemanuk_prng(&rc, buf, sizeof buf);
while (write(1, buf, sizeof buf) != sizeof buf)
if (errno && errno != EINTR)
fail(4, "write error\n");
}
}
}
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