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AES-CMAC implementation based on extant 128-bit AES, following closely to the description in RFC 4493. Timing depends only on the length of the message, not the content or the keys. Signed-off-by: Jade Philipoom <jadep@google.com> BRANCH=cr50 BUG=b:72788497 TEST=Passed the four test vectors provided in the RFC; these tests are defined as commands in aes_cmac.c and can be run with "test_cmac 1 2 3 4" when CRYPTO_TEST_SETUP is defined. Change-Id: I96fb4f29927c11970a6a17c0fd583694aa945c91 Reviewed-on: https://chromium-review.googlesource.com/975181 Commit-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Vadim Bendebury <vbendeb@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly