// Save the contents of the given FileContents object under the given
// filename. Return 0 on success.
int SaveFileContents(const char* filename, FileContents file) {
int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_SYNC, S_IRUSR | S_IWUSR);
if (fd < 0) {
printf("failed to open \"%s\" for write: %s\n",
filename, strerror(errno));
return -1;
}
ssize_t bytes_written = FileSink(file.data, file.size, &fd);
if (bytes_written != file.size) {
printf("short write of \"%s\" (%ld bytes of %ld) (%s)\n",
filename, (long)bytes_written, (long)file.size,
strerror(errno));
close(fd);
return -1;
}
fsync(fd);
close(fd);
if (chmod(filename, file.st.st_mode) != 0) {
printf("chmod of \"%s\" failed: %s\n", filename, strerror(errno));
return -1;
}
if (chown(filename, file.st.st_uid, file.st.st_gid) != 0) {
printf("chown of \"%s\" failed: %s\n", filename, strerror(errno));
return -1;
}
return 0;
}
void FIPS140_GenerateRandomFiles()
{
#ifdef OS_RNG_AVAILABLE
AutoSeededX917RNG<DES_EDE3> rng;
RandomNumberStore store(rng, ULONG_MAX);
for (unsigned int i=0; i<100000; i++)
store.TransferTo(FileSink((IntToString(i) + ".rnd").c_str()).Ref(), 20000);
#else
cout << "OS provided RNG not available.\n";
exit(-1);
#endif
}