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The random bytes are obtained from /dev/urandom and are suitable for almost all uses (except for generating long-lived secure keys). Documentation suggests that /dev/urandom is widely available on Unix-like systems (such FreeBSD and NetBSD). A public libxl_random_bytes() (or similar) could be trivially added, if this required in the future. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>