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gerrit.openbmc.org / openbmc / bmcweb / ed3982131dcef2b499da36e674d2d21b2289ef29
commited3982131dcef2b499da36e674d2d21b2289ef29[log] [tgz]
authorEd Tanous <edtanous@google.com>Wed Jun 09 17:05:54 2021 -0700
committerEd Tanous <ed@tanous.net>Wed Jul 07 22:25:09 2021 +0000
treef6e83bfbf48b44d814b0b52514bb65c663ecea11
parent3a2d042432168ad1b555e4fc9f13c2ae0d35e0c7 [diff]
Automate PrivilegeRegistry to code

This commit attempts to automate the creation of our privileges
structures from the redfish privilege registry.  It accomplishes this by
updating parse_registries.py to also pull down the privilege registry
from DMTF.
The script then generates privilege_registry.hpp, which include const
defines for all the privilege registry entries in the same format that
the Privileges struct accepts.  This allows new clients to simply
reference the variable to these privilege structures, instead of having
to manually (ie error pronely) put the privileges in themselves.

This commit updates all the routes.

For the moment, override and OEM schemas are not considered.  Today we
don't have any OEM-specific Redfish routes, so the existing ones inherit
their parents schema.  Overrides have other issues, and are already
incorrect as Redfish defines them.

Binary size remains unchanged after this patchset.

Tested:
Ran redfish service validator

Ran test case from f9a6708c4c6490257e2eb6a8c04458f500902476 to ensure
that the new privileges constructor didn't cause us to regress the brace
construction initializer.

Checked binary size with:
gzip -c
$BBPATH/tmp/work/s7106-openbmc-linux-gnueabi/obmc-phosphor-image/1.0-r0/rootfs/usr/bin/bmcweb
| wc -c
1244048

(tested on previous patchset)

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ideede3d5b39d50bffe7fe78a0848bdbc22ac387f
31 files changed
tree: f6e83bfbf48b44d814b0b52514bb65c663ecea11
  1. .github/
  2. http/
  3. include/
  4. redfish-core/
  5. scripts/
  6. src/
  7. static/
  8. subprojects/
  9. .clang-format
  10. .clang-ignore
  11. .clang-tidy
  12. .dockerignore
  13. .gitignore
  14. .shellcheck
  15. bmcweb.service.in
  16. bmcweb.socket.in
  17. bmcweb_config.h.in
  18. build_x86.sh
  19. build_x86_docker.sh
  20. COMMON_ERRORS.md
  21. DEVELOPING.md
  22. Dockerfile
  23. Dockerfile.base
  24. LICENCE
  25. MAINTAINERS
  26. meson.build
  27. meson_options.txt
  28. OEM_SCHEMAS.md
  29. OWNERS
  30. pam-webserver
  31. README.md
  32. Redfish.md
README.md

OpenBMC webserver

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

Capabilities

At this time, the webserver implements a few interfaces:

  • Authentication middleware that supports cookie and token based authentication, as well as CSRF prevention backed by linux PAM authentication credentials.
  • An (incomplete) attempt at replicating phosphor-dbus-rest interfaces in C++. Right now, a few of the endpoint definitions work as expected, but there is still a lot of work to be done. The portions of the interface that are functional are designed to work correctly for phosphor-webui, but may not yet be complete.
  • Replication of the rest-dbus backend interfaces to allow bmc debug to logged in users.
  • An initial attempt at a read-only redfish interface. Currently the redfish interface targets ServiceRoot, SessionService, AccountService, Roles, and ManagersService. Some functionality here has been shimmed to make development possible. For example, there exists only a single user role.
  • SSL key generation at runtime. See the configuration section for details.
  • Static file hosting. Currently, static files are hosted from the fixed location at /usr/share/www. This is intended to allow loose coupling with yocto projects, and allow overriding static files at build time.
  • Dbus-monitor over websocket. A generic endpoint that allows UIs to open a websocket and register for notification of events to avoid polling in single page applications. (this interface may be modified in the future due to security concerns.

Configuration

BMCWeb is configured by setting -D flags that correspond to options in bmcweb/meson_options.txt and then compiling. For example, meson <builddir> -Dkvm=disabled ... followed by ninja in build directory. The option names become C++ preprocessor symbols that control which code is compiled into the program.

Compile bmcweb with default options:

meson builddir
ninja -C builddir

Compile bmcweb with yocto defaults:

meson builddir -Dbuildtype=minsize -Db_lto=true -Dtests=disabled
ninja -C buildir

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

Enable/Disable meson wrap feature

meson builddir -Dwrap_mode=nofallback
ninja -C builddir

Enable debug traces

meson builddir -Dbuildtype=debug
ninja -C builddir

Generate test coverage report:

meson builddir -Db_coverage=true -Dtests=enabled
ninja coverage -C builddir test

When BMCWeb starts running, it reads persistent configuration data (such as UUID and session data) from a local file. If this is not usable, it generates a new configuration.

When BMCWeb SSL support is enabled and a usable certificate is not found, it will generate a self-sign a certificate before launching the server. The keys are generated by the secp384r1 algorithm. The certificate

  • is issued by C=US, O=OpenBMC, CN=testhost,
  • is valid for 10 years,
  • has a random serial number, and
  • is signed using the SHA-256 algorithm.