rust/fuzz (cargo-fuzz, nightly, its own workspace with the same IronRDP
patches) has targets for the Telnet IAC parser, the IRC parser + state
machine + mIRC formatter, VNC framebuffer updates and decoders,
~/.ssh/config parsing and the update manifest. They reach the private
parsers through hidden entry points behind nexus-core's 'fuzzing'
feature. A nightly workflow runs each for two minutes and uploads any
crashing input. A first 45 s run of each locally found nothing.
clients::rdp connects over any caller-dialled TCP stream (direct, proxy
or SSH tunnel), upgrades to TLS and logs on with NLA (CredSSP/NTLM),
optionally falling back to TLS-only logon for servers without NLA such
as xrdp (credentials are passed so they log straight in). The server
certificate is pinned through a caller check on its SHA256 fingerprint
before any credentials are sent. The desktop decodes into the VNC
client's RGBA framebuffer; input (IronRDP's scancode/Unicode/mouse
operations), Display Control resizes and the deactivation-reactivation
sequence run on the session thread.
IronRDP's releases need three vendored patches (vendor/README.md):
picky and sspi with their RustCrypto release-candidate pins relaxed so
they share russh's stable versions (their own suites, 402 tests, pass
against them), and ironrdp-session with two unreleased upstream bitmap
fixes (#1486 stride, #1524 RDP6 orientation) without which xrdp desktops
render sheared.
Verified live against xrdp (scottyhardy/docker-remote-desktop): logon,
full desktop rendering, keyboard and mouse input.
Andy Dixon