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gerrit.openbmc.org / openbmc / bmcweb / 11e8f60df2fbe1ceafdf886132bd93d112a726bf
commit11e8f60df2fbe1ceafdf886132bd93d112a726bf[log] [tgz]
authorEd Tanous <edtanous@google.com>Thu Aug 24 14:25:18 2023 -0700
committerEd Tanous <ed@tanous.net>Mon Sep 25 17:50:15 2023 +0000
treea5a393b6ec81a04d7c021737ca71ba58af1482eb
parentb25644a1ae3bbf00ddea91ad494be959cb2632c8 [diff]
Clean up vm CredentialPipe

This code is needlessly complicated for what it does.  Even with the
intent, which is secure buffer cleanup, it's trivial to encase all this
into a single class that accepts the strings by rvalue reference, then
cleans them up afterward.

Doing this also cleans up a potential lifetime problem, where if the
unix socket returned immediately, it would've invalidated the buffers
that were being sent.  It also moves to async_write, instead of
async_write_some.  The former could in theory fail if the socket blocks
(unlikely in this scenario) but it's good to handle anyway.

Tested: Need some help here.  There's no backend for this, so we might
just have to rely on inspection.

Change-Id: I9032d458f8eb7a0689bee575aae611641bacee26
Signed-off-by: Ed Tanous <edtanous@google.com>
4 files changed
tree: a5a393b6ec81a04d7c021737ca71ba58af1482eb
  1. .github/
  2. config/
  3. http/
  4. include/
  5. redfish-core/
  6. scripts/
  7. src/
  8. static/
  9. subprojects/
  10. test/
  11. .clang-format
  12. .clang-tidy
  13. .dockerignore
  14. .gitignore
  15. .markdownlint.yaml
  16. .openbmc-enforce-gitlint
  17. .prettierignore
  18. .shellcheck
  19. AGGREGATION.md
  20. CLIENTS.md
  21. COMMON_ERRORS.md
  22. DBUS_USAGE.md
  23. DEVELOPING.md
  24. HEADERS.md
  25. LICENSE
  26. meson.build
  27. meson_options.txt
  28. OEM_SCHEMAS.md
  29. OWNERS
  30. README.md
  31. Redfish.md
  32. run-ci
  33. setup.cfg
  34. TESTING.md
README.md

OpenBMC webserver

This component attempts to be a "do everything" embedded webserver for OpenBMC.

Features

The webserver implements a few distinct interfaces:

  • DBus event websocket. Allows registering on changes to specific dbus paths, properties, and will send an event from the websocket if those filters match.
  • OpenBMC DBus REST api. Allows direct, low interference, high fidelity access to dbus and the objects it represents.
  • Serial: A serial websocket for interacting with the host serial console through websockets.
  • Redfish: A protocol compliant, DBus to Redfish translator.
  • KVM: A websocket based implementation of the RFB (VNC) frame buffer protocol intended to mate to webui-vue to provide a complete KVM implementation.

Protocols

bmcweb at a protocol level supports http and https. TLS is supported through OpenSSL.

AuthX

Authentication

Bmcweb supports multiple authentication protocols:

  • Basic authentication per RFC7617
  • Cookie based authentication for authenticating against webui-vue
  • Mutual TLS authentication based on OpenSSL
  • Session authentication through webui-vue
  • XToken based authentication conformant to Redfish DSP0266

Each of these types of authentication is able to be enabled or disabled both via runtime policy changes (through the relevant Redfish APIs) or via configure time options. All authentication mechanisms supporting username/password are routed to libpam, to allow for customization in authentication implementations.

Authorization

All authorization in bmcweb is determined at routing time, and per route, and conform to the Redfish PrivilegeRegistry.

*Note: Non-Redfish functions are mapped to the closest equivalent Redfish privilege level.

Configuration

bmcweb is configured per the meson build files. Available options are documented in meson_options.txt

Compile bmcweb with default options

meson setup builddir
ninja -C builddir

If any of the dependencies are not found on the host system during configuration, meson will automatically download them via its wrap dependencies mentioned in bmcweb/subprojects.

Use of persistent data

bmcweb relies on some on-system data for storage of persistent data that is internal to the process. Details on the exact data stored and when it is read/written can seen from the persistent_data namespace.

TLS certificate generation

When SSL support is enabled and a usable certificate is not found, bmcweb will generate a self-signed a certificate before launching the server. Please see the bmcweb source code for details on the parameters this certificate is built with.

Redfish Aggregation

bmcweb is capable of aggregating resources from satellite BMCs. Refer to AGGREGATION.md for more information on how to enable and use this feature.