9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * This file and its contents are supplied under the terms of the
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * Common Development and Distribution License ("CDDL"), version 1.0.
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * You may only use this file in accordance with the terms of version
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * 1.0 of the CDDL.
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * A full copy of the text of the CDDL should have accompanied this
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * source. A copy of the CDDL is also available via the Internet at
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * Copyright (c) 2015, Joyent, Inc.
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * getrandom system call implementation
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * Impose a maximum upper bound on the number of bytes that we'll read in one
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * go, ala a read of /dev/random. For /dev/urandom, we clamp it based on our
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * return value, because the system call returns an int, we can't handle more
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * than INT_MAX.
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchigetrandom(void *bufp, size_t buflen, int flags)
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi if (flags & ~(GRND_NONBLOCK | GRND_RANDOM))
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi if ((flags & GRND_RANDOM) && buflen > MAXRANDBYTES) {
a17dff0dc9d07cb9734943b1f593b856d17776b4Robert Mustacchi size_t len = MIN(sizeof (rbytes), buflen - out);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi err = random_get_blocking_bytes(rbytes, len);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi err = random_get_pseudo_bytes(rbytes, len);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi if (ddi_copyout(rbytes, buf + out, len, 0) != 0)