Dropbear gathers its entropy from /dev/urandom (libtomcrypt's
rng_get_bytes tries /dev/urandom before /dev/random), so requiring
ARCH_HAVE_RNG and DEV_RANDOM shuts the port out of targets without a
hardware TRNG -- including the simulator, where a dropbear
configuration silently loses NETUTILS_DROPBEAR at configure time.
Keep only the DEV_URANDOM requirement.
Signed-off-by: Felipe Moura <moura.fmo@gmail.com>
Integrated SSH daemon authenticating against FSUTILS_PASSWD, with an
ECDSA P-256 host key and an NSH session over a PTY per connection. Built
from the upstream Dropbear tarball (pinned commit) and patched for
NuttX, using Dropbear's bundled libtomcrypt for all crypto. setsid()
(apache/nuttx#19184) and link() now come from NuttX, not local stubs.
Signed-off-by: Felipe Moura <moura.fmo@gmail.com>
