Replace the bundled libtomcrypt chacha20-poly1305 implementation with an
adapter that drives the NuttX crypto device: the SSH construction maps onto
CRYPTO_CHACHA20_DJB (the original 64-bit counter/nonce ChaCha20
parameterization used by chacha20-poly1305@openssh.com) for the packet
length and payload streams, and onto CRYPTO_POLY1305 for the authentication
tag (plain MACs are driven in two steps through /dev/crypto: COP_FLAG_UPDATE
feeds the data, a final call retrieves the tag).
Signed-off-by: Felipe Moura <moura.fmo@gmail.com>
Replace the bundled libtomcrypt HMAC modules with an adapter that computes the hmac-sha2-256 packet MAC through the NuttX crypto device using CRYPTO_SHA2_256_HMAC sessions.
Require CRYPTO, CRYPTO_RANDOM_POOL, CRYPTO_CRYPTODEV and CRYPTO_CRYPTODEV_SOFTWARE_CRYPTO explicitly instead of selecting crypto support.
Signed-off-by: Felipe Moura <moura.fmo@gmail.com>
Rename base64_encode, base64_decode, and ecc_make_key in bundled
libtomcrypt to avoid duplicate symbol link errors when dropbear is built
alongside netutils/codecs and NuttX crypto (e.g. sim:dropbear).
Signed-off-by: Abhishek Mishra <mishra.abhishek2808@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>
