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gerrit.openbmc.org / openbmc / bmcweb / 1d9502bb7f39144e01773253de69190c917b9bed
commit1d9502bb7f39144e01773253de69190c917b9bed[log] [tgz]
authorJoseph Reynolds <joseph-reynolds@charter.net>Fri May 12 10:47:30 2023 -0500
committerEd Tanous <ed@tanous.net>Tue Jun 20 19:44:22 2023 +0000
treee73cb15b376b5f92103d70dc0d25ef988885abf1
parente96d7fbfe7f8e4ced88e960a66fca639234929c1 [diff]
Add headers Referrer-Policy and Permissions-Policy

This adds HTTP response headers Referrer-Policy and Permissions-Policy per
OWASP guidelines, with some appropriate values for BMCWeb.
https://owasp.org/www-project-secure-headers/

Policies are given for all standardized feature.  Most features are disabled
except for the following which the web application uses: usb=(self).

Tested: Yes
Via curl, confirmed headers are present.
On selected browsers, opened browser tools and confirmed browsers didn't
complain about the new headers.  Browsers checked were:
- Firefox 111.0.1 (64-bit)
- Safari Version 16.4 (18615.1.26.11.23)

Did not test access to features secured by the Permissions-Policy.
Did not test if the web application features still work.

Change-Id: I65f89d2959b0b1338c20d7222229fbdc1d720834
Signed-off-by: Joseph Reynolds <joseph-reynolds@charter.net>
1 file changed
tree: e73cb15b376b5f92103d70dc0d25ef988885abf1
  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.