view libtomcrypt/notes/tech0005.txt @ 419:b2f81110c80b channel-fix

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author Matt Johnston <>
date Sun, 11 Feb 2007 09:55:00 +0000
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Tech Note 0005
Minimizing Code Space
Tom St Denis



You can disable whole classes of algorithms on the command line with the LTC_NO_* defines.  From there you can manually turn on what you want to enable.  

The following build with GCC 3.4.4 on an AMD64 box gets you AES, CTR mode, SHA-256, HMAC, Yarrow, full RSA PKCS #1, PKCS #5 and ASN.1 DER in 
roughly 40KB of code (49KB on the ARMv4) (both excluding the math library).


Obviously this won't get you performance but if you need to pack a crypto lib in a device with limited means it's more than enough...

Neato eh?