The Freedom-K64F is an ultra-low-cost development platform for Kinetis K64, K63, and K24 MCUs.
K64F crypto-acceleration unit (CAU)
Topic last updated
14 Jan 2016, by
Julian Higginson.
1 reply
The K64F has a crypto-acceleration unit (CAU) that can speedup software DES/AES/SHA/MD5. Freescale has an assembler wrapper at
http://www.freescale.com/products/arm-processors/kinetis-cortex-m/k-series/k7x-glcd-mcus/crypto-acceleration-unit-cau-and-mmcau-software-library:CAUAP
The CAU speeds the time-critical crypto operations, and the library only accesses those basic operations, so you still need to add logic for padding hash input and doing CBC encryption. The Freescale library is in GNU C/assembler so it doesn't work with MBED on-line compiler. I exported the GNU GCC MBED build environment to test the CAU library on K64F @ 120MHz. Here are some preliminary results comparing CAU with C implementation:
CAU C
MD5 (KBs) 10964 5471
SHA256(KBs) 3322 2165
AES set key(us) 3 25 128-bit key
AES CBC (us) 11 189 64 bytes
Has anyone ported the CAU library to work with the MBED on-line compiler?
julianhigginson
#
14 Jan 2016
oooh! this is something I might like to see working in mbed. have you had a chance to make any progress with this yourself?
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The K64F has a crypto-acceleration unit (CAU) that can speedup software DES/AES/SHA/MD5. Freescale has an assembler wrapper at http://www.freescale.com/products/arm-processors/kinetis-cortex-m/k-series/k7x-glcd-mcus/crypto-acceleration-unit-cau-and-mmcau-software-library:CAUAP The CAU speeds the time-critical crypto operations, and the library only accesses those basic operations, so you still need to add logic for padding hash input and doing CBC encryption. The Freescale library is in GNU C/assembler so it doesn't work with MBED on-line compiler. I exported the GNU GCC MBED build environment to test the CAU library on K64F @ 120MHz. Here are some preliminary results comparing CAU with C implementation:
Has anyone ported the CAU library to work with the MBED on-line compiler?