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[0/4] crypto: time invariant AES for CCM (and GCM/CTR)

Message ID 1485451063-11822-1-git-send-email-ard.biesheuvel@linaro.org
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Series crypto: time invariant AES for CCM (and GCM/CTR) | expand

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Ard Biesheuvel Jan. 26, 2017, 5:17 p.m. UTC 
This series is primarily directed at improving the performance and security
of CCM on the Rasperry Pi 3. This involves splitting the MAC handling of
CCM into a separate driver so that we can efficiently replace it by something
else using the ordinary algo resolution machinery.

Patch #1 adds some testcases for cbcmac(aes), which will be introduced later.

Patch #2 replaces the open coded CBC MAC hashing routines in the CCM driver
with calls to a cbcmac() hash, and implements a template for producing such
transforms. This eliminates all the fuzzy scatterwalk code as well.

Patch #3 implements cbcmac(aes) using NEON on arm64

Patch #4 is an RFC patch that implements ctr(aes) and cbcmac(aes) in a way
that is intended to eliminate observeable data dependent latencies in AES
processing, by replacing the usual 16 KB of lookup tables with a single
Sbox that is prefetched before processing each block. It is 50% slower than
generic AES, but this may be acceptable in many cases.

Ard Biesheuvel (4):
  crypto: testmgr - add test cases for cbcmac(aes)
  crypto: ccm - switch to separate cbcmac driver
  crypto: arm64/aes - add NEON and Crypto Extension CBC-MAC driver
  crypto: aes - add generic time invariant AES for CTR/CCM/GCM

 arch/arm64/crypto/aes-glue.c  | 102 ++++++
 arch/arm64/crypto/aes-modes.S |  19 +
 crypto/Kconfig                |  15 +
 crypto/Makefile               |   1 +
 crypto/aes_ti.c               | 314 ++++++++++++++++
 crypto/ccm.c                  | 373 +++++++++++++-------
 crypto/testmgr.c              |   7 +
 crypto/testmgr.h              |  58 +++
 8 files changed, 753 insertions(+), 136 deletions(-)
 create mode 100644 crypto/aes_ti.c

-- 
2.7.4

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