/**
Read the system RNG
@param out Destination
@param outlen Length desired (octets)
@param callback Pointer to void function to act as "callback" when RNG is slow. This can be NULL
@return Number of octets read
*/
unsigned long rng_get_bytes(unsigned char *out, unsigned long outlen,
void (*callback)(void))
{
unsigned long x;
LTC_ARGCHK(out != NULL);
#if defined(DEVRANDOM)
x = rng_nix(out, outlen, callback); if (x != 0) { return x; }
#endif
#ifdef WIN32
x = rng_win32(out, outlen, callback); if (x != 0) { return x; }
#endif
return 0;
}
unsigned long rng_get_bytes(unsigned char *buf, unsigned long len,
void (*callback)(void))
{
unsigned long x;
_ARGCHK(buf != NULL);
#if defined(DEVRANDOM)
x = rng_nix(buf, len, callback); if (x != 0) { return x; }
#endif
#ifdef WIN32
x = rng_win32(buf, len, callback); if (x != 0) { return x; }
#endif
#ifdef ANSI_RNG
x = rng_ansic(buf, len, callback); if (x != 0) { return x; }
#endif
return 0;
}