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gerrit.openbmc.org / openbmc / bmcweb / 0e1cf26b1cd98e0ec069e6187434fcabf1e9c200
commit0e1cf26b1cd98e0ec069e6187434fcabf1e9c200[log] [tgz]
authorAdriana Kobylak <anoo@us.ibm.com>Thu Dec 05 13:57:57 2019 -0600
committerAdriana Kobylak <anoo@linux.ibm.com>Thu Dec 19 14:30:48 2019 +0000
treee390d202eafebcfb12378a64ea9d2d870c04d454
parentc00500bcb9c5145f5cacb78bbe3dd694fb85ba0a [diff]
Make the max http request body size configurable

OpenBMC supports "System" or "bundled" images that contain two or more
firmware images, such as BMC and Host or PSU firmware, making the
resulting image file greater than the current limit of 30MB.

Make the http request body size configurable to allow bigger files to
be uploaded.

Tested:
- Upload a regular BMC image still works.
- Uploading a 50MB firmware image that contains the host fw fails:
$ curl -k -H "X-Auth-Token: $token" -H "Content-Type: application/octet-stream" -X POST -T obmc-phosphor-image-witherspoon-128.ubi.mtd.tar https://${bmc}/upload/image
curl: (52) Empty reply from server

- With the "-DBMCWEB_HTTP_REQ_BODY_LIMIT_MB=128" compile option works:
$ curl -k -H "X-Auth-Token: $token" -H "Content-Type: application/octet-stream" -X POST -T obmc-phosphor-image-witherspoon-128.ubi.mtd.tar https://${bmc}/upload/image
{
  "data": "19e6fe13",
  "message": "200 OK",
  "status": "ok"
}

Change-Id: I0b0e1032c9daf00a01e42ac5ee1c0d979f857d5e
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
3 files changed
tree: e390d202eafebcfb12378a64ea9d2d870c04d454
  1. cmake/
  2. http/
  3. include/
  4. redfish-core/
  5. scripts/
  6. src/
  7. static/
  8. .clang-format
  9. .gitignore
  10. bmcweb.service.in
  11. bmcweb.socket
  12. build_x86.sh
  13. cmake-format.json
  14. CMakeLists.txt
  15. CMakeLists.txt.in
  16. config.h.in
  17. DEVELOPING.md
  18. JenkinsFile
  19. LICENCE
  20. MAINTAINERS
  21. pam-webserver
  22. README.md
  23. 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/CMakeLists.txt and then compiling. For example, cmake -DBMCWEB_ENABLE_KVM=NO ... followed by make. The option names become C++ preprocessor symbols that control which code is compiled into the program.

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 prime256v1 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.