This is part of revision 4423 of the EK-This example shows how to use pre-expanded keys to encrypt some plaintext, and then decrypt it back to the original message. Using pre-expanded keys avoids the need to perform the expansion at run-time. This example also uses cipher block chaining (CBC) mode instead of the simpler ECB mode. LM3S6965 Firmware Package.

aes_expanded_key
................\aes_config_opts.h
................\aes_expanded_key.c
................\aes_expanded_key.ewd
................\aes_expanded_key.ewp
................\aes_expanded_key.icf
................\aes_expanded_key.ld
................\aes_expanded_key.Opt
................\aes_expanded_key.sct
................\aes_expanded_key.Uv2
................\aes_expanded_key_aes_expanded_key.dep
................\aes_expanded_key_codered.ld
................\aes_expanded_key_Opt.Bak
................\aes_expanded_key_sourcerygxx.ld
................\aes_expanded_key_Uv2.Bak
................\aes_iv.c
................\codered
................\.......\aes_expanded_key.axf
................\.......\aes_expanded_key.bin
................\cr_project.xml
................\dec_key.h
................\enc_key.h
................\ewarm
................\.....\Exe
................\.....\...\aes_expanded_key.bin
................\.....\...\aes_expanded_key.out
................\gcc
................\...\aes_expanded_key.axf
................\...\aes_expanded_key.bin
................\lm3s6965-rom.ld
................\Makefile
................\readme.txt
................\rvmdk
................\.....\aes.crf
................\.....\aes.d
................\.....\aes.o
................\.....\aes_expanded_key.axf
................\.....\aes_expanded_key.bin
................\.....\aes_expanded_key.crf
................\.....\aes_expanded_key.d
................\.....\aes_expanded_key.htm
................\.....\aes_expanded_key.lnp
................\.....\aes_expanded_key.map
................\.....\aes_expanded_key.o
................\.....\aes_expanded_key.plg
................\.....\aes_expanded_key.tra
................\.....\aes_iv.crf
................\.....\aes_iv.d
................\.....\aes_iv.o
................\.....\rit128x96x4.crf
................\.....\rit128x96x4.d
................\.....\rit128x96x4.o
................\.....\startup_rvmdk.o
................\sourcerygxx
................\...........\aes_expanded_key.axf
................\...........\aes_expanded_key.bin
................\startup_codered.c
................\startup_ewarm.c
................\startup_gcc.c
................\startup_rvmdk.S
................\startup_sourcerygxx.c

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