Gitiles
Code Review Sign In
gerrit.openbmc.org / openbmc / bmcweb / 55e43f69db10c3320430c190853bff8a5a272965
commit55e43f69db10c3320430c190853bff8a5a272965[log] [tgz]
authorKowalski, Kamil <kamil.kowalski@intel.com>Wed Jul 10 13:12:57 2019 +0200
committerJames Feist <james.feist@linux.intel.com>Fri Nov 08 16:52:06 2019 +0000
treea54e098c8702af8d083a48de0aaf576a8cc84b93
parent8ae37025d83533889be862d73d8ec701a818275a [diff]
TLS based user auth implementation

Implemented TLS based user auth. It utilizes certificates stored by
Phosphor Certificate Manager in storage mode, to verify that user
that tries to log in, has a certificate signed by a trusted CA.

More about this can be read in redfish-tls-user-authentication.md design
document.

Tested that it does not break current authentication methods, when not
using TLS Auth - user should not see difference between versions. TLS Auth
itself allows user in when certificate is signed by trusted CA and valid, and
stops working immediatley after it is removed. User is not let in when provided
certificate is not between notBefore and notAfter dates. Session is tested to
not be created when user does not exist in the system (courtesy of earlier
UserManagement usage commits).

Signed-off-by: Kowalski, Kamil <kamil.kowalski@intel.com>
Change-Id: I6bcaff018fe3105f77d3c10f69765e0011af8dab
Signed-off-by: Zbigniew Kurzynski <zbigniew.kurzynski@intel.com>
3 files changed
tree: a54e098c8702af8d083a48de0aaf576a8cc84b93
  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. DEVELOPING.md
  17. JenkinsFile
  18. LICENCE
  19. MAINTAINERS
  20. pam-webserver
  21. README.md
  22. 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.