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+=================
+Architecture page
+=================
+
+keystonemiddleware architecture - 4.17.1/pike
+---------------------------------------------
+**Status**: Draft/Ready for Review/Reviewed
+
+**Release**: Pike
+
+**Version**: 4.17.1
+
+**Contacts**:
+
+- PTL: Lance Bragstad - lbragstad
+
+- Architect: Gage Hugo - gagehugo
+
+- Security Reviewer: Luke Hinds - lhinds
+- Security Reviewer: Jeremy Stanley - fungi
+
+Project description and purpose
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+keystonemiddleware [0]_ is primarily used for integrating with the OpenStack
+Identity API [2]_ and handling authorization enforcement based upon the data
+within the OpenStack Identity tokens. Also included is middleware that
+provides the ability to create audit events based on API requests.
+
+
+Primary users and use-cases
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+The primary users of keystonemiddleware are other services within an OpenStack
+deployment that require identity information supplied from OpenStack
+Identity (keystone).
+
+
+External dependencies & associated security assumptions
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+keystonemiddleware depends on having an OpenStack Identity (keystone) [2]_
+endpoint. Without an Identity endpoint, there is not much use for
+keystonemiddleware. It also depends on having a service configuration
+for the service that it is protecting.
+
+
+Components
+~~~~~~~~~~
+
+- OpenStack Identity - keystone (Python)
+- memcache (optional)
+
+
+Service architecture diagram
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. image:: figures/keystonemiddleware_architecture-diagram.png
+
+Architecture Page [1]_
+
+Data assets
+~~~~~~~~~~~
+
+- *Authorization Tokens* - persisted in memcache
+- *memcache encryption keys* - persisted in keystonemiddleware.conf
+
+
+Data asset impact analysis
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Data Assets:
+- *Authorization Token*:
+  - Integrity Failure Impact: Attacker that can capture and hijack a valid
+    auth token can get access to anything scoped to the token.
+
+- *keystonemiddleware.conf*:
+  - Integrity Failure Impact: Attacker who can read the config file can gain
+    access to the memcache encryption key, which can allow them to access and
+    modify all cached tokens.
+
+
+Interfaces
+~~~~~~~~~~
+
+1. User -> KeystoneMiddleware *[TLS]*:
+   - Assets in flight: keystone Token
+   - An attacker who can successfully intercept the token can modify anything
+     that the token is scoped to. This has potential availability impact.
+
+
+Resources
+~~~~~~~~~
+
+.. [0] `<https://docs.openstack.org/developer/keystonemiddleware/#python-middleware-for-openstack-identity-api-keystone>`_
+.. [1] `<https://docs.openstack.org/developer/keystonemiddleware/middlewarearchitecture.html>`
+.. [2] `<https://docs.openstack.org/developer/keystone/index.html>`
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diff --git a/doc/source/artifacts/keystonemiddleware/pike/review-findings.rst b/doc/source/artifacts/keystonemiddleware/pike/review-findings.rst
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+========================
+Security review findings
+========================
+
+keystonemiddleware security review findings - 4.17.1/pike
+---------------------------------------------------------
+
+**Status**: Draft/Completed
+
+**Release**: Pike
+
+**Version**: 4.17.1
+
+**Review Date**: 02/26/2018
+
+**Review Body**: OpenStack Security SIG
+
+**Contacts**:
+
+- PTL: Lance Bragstad - lbragstad
+
+- Architect: Gage Hugo - gagehugo
+
+- Security Reviewer: Luke Hinds - lhinds
+- Security Reviewer: Jeremy Stanley - fungi
+
+
+1. Security memcache with Pycrypto library
+~~~~~~~~~~~~~~~~
+
+- Risk: Project documentation recommends use of the pycrypto library to secure
+  memcache. Pycrypto is no longer maintained [0] with a last release made in
+  2014. It also contains an unpatched CVE [1].
+- Impact: Potential security flaw when using pycrypto due to lack of updates
+  and security fixes.
+- Likelihood: Medium
+- Impact: Medium
+- Overall Risk Rating: Medium
+- Bug: https://bugs.launchpad.net/keystonemiddleware/+bug/1677308
+- Recommendation: Correct docs to reference the cryptography libary.
+- Investigation Results: Keystonemiddleware has since moved away from PyCrypto
+  to a supported encryption library [2].
+
+[0] https://github.com/dlitz/pycrypto/issues/173
+[1] https://github.com/dlitz/pycrypto/issues/176
+[2] https://github.com/openstack/keystonemiddleware/commit/e23cb36ac03c5e3a368cb8c493927cf8babc8dbc