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gerrit.openbmc.org / openbmc / bmcweb / d4b6c66034de374cf0b14e05b0d20e87a8cefaf3
commitd4b6c66034de374cf0b14e05b0d20e87a8cefaf3[log] [tgz]
authorEd Tanous <edtanous@google.com>Wed Mar 10 13:29:30 2021 -0800
committerEd Tanous <ed@tanous.net>Mon Apr 26 19:11:36 2021 +0000
tree4c00cad1d77272925af143531b19d898ac2f84d5
parent1a6258dc985cde406d9098130e4a2d683e82beb2 [diff]
Fix infinite redirect when webui isn't installed

In the begining, bmcweb had its own webui checked in as source.  Largely
conceived of clay, and built by someone that doesn't understand UI
development (me), it was eventually superceeded by phosphor-webui.  When
we did that, we created a bug where bmcweb was expecting a UI to always
be installed, and when it wasn't resolved into an infinite recursive
redirect as it tried to find the login page.

This patchset fixes that, by adding a connection between the
authorization class, and the webassets class, for bmcweb to detect at
runtime whether or not the UI is installed, and change behavior in that
case.

Along the way, we got a circular #include, so some includes needed to be
rearranged slightly.

This patchset will change no behavior when the UI is installed.  Login
failures will continue to redirect to /, to hit the login page.

If the UI is not installed, and there is no / route, BMCWEB will return
the plaintext UNAUTHORIZED if you attempt to open the webui from the
browser without having a webui installed and without having credentials.

Tested:
Launched in a build without webui-vue, and observed "UNAUTHORIZED" when
I connected through chrome.
Also launched in a build with webui-vue installed with:
IMAGE_INSTALL_append = "webui-vue"
And loaded the webui in chrome, and logged in successfully.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Iac9b83ba9e80d434479685b082d547847cdfe309
4 files changed
tree: 4c00cad1d77272925af143531b19d898ac2f84d5
  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
  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

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.