2014-05-30 16:25:47 +04:00
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### Tiny AES128 in C
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2014-05-30 16:24:49 +04:00
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2014-05-29 06:01:10 +04:00
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This is a small portable (and slow?) implementation of AES128 in C.
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2014-05-29 04:29:06 +04:00
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2014-05-29 04:43:12 +04:00
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AES128 ECB is symmetric, so you use the same function for encrypting and decrypting.
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2014-05-29 05:57:07 +04:00
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The module uses just a bit more than 200 bytes of RAM and 1K ROM when compiled for ARM.
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YMMV depending on target platform and optimization skills of your compiler.
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2014-05-29 04:29:06 +04:00
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2014-05-29 04:43:12 +04:00
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GCC size output when compiled for ARM:
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2014-05-30 16:25:47 +04:00
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`
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2014-05-29 04:43:28 +04:00
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$ arm-none-eabi-gcc -Os -c aes.c -o aes.o
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$ size aes.o
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2014-05-29 05:50:24 +04:00
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text data bss dec hex filename
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1079 0 204 1283 503 aes.o
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2014-05-30 16:25:47 +04:00
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`
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2014-05-29 05:50:24 +04:00
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2014-05-29 04:43:12 +04:00
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2014-05-29 05:57:07 +04:00
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$ arm-none-eabi-gcc --version
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arm-none-eabi-gcc (GNU Tools for ARM Embedded Processors) 4.8.3 20131129 (release) [ARM/embedded-4_8-branch revision 205641]
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Copyright (C) 2013 Free Software Foundation, Inc.
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This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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2014-05-29 05:58:14 +04:00
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2014-05-29 06:04:06 +04:00
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The implementation is verified against the data in National Institute of Standards and Technology Special Publication 800-38A 2001 ED.
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