Mercurial > dropbear
diff notes/tech0005.txt @ 280:59400faa4b44 libtomcrypt-orig libtomcrypt-1.05
Re-import libtomcrypt 1.05 for cleaner propagating.
From crypt-1.05.tar.bz2, SHA1 of 88250202bb51570dc64f7e8f1c943cda9479258f
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 08 Mar 2006 12:58:00 +0000 |
parents | |
children | d5faf4814ddb |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/notes/tech0005.txt Wed Mar 08 12:58:00 2006 +0000 @@ -0,0 +1,18 @@ +Tech Note 0005 +Minimizing Code Space +Tom St Denis + +Introduction +------------ + +Tweaking... + +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 3.4.3 on an AMD64 box gets you AES, CTR mode, SHA-256, HMAC, Yarrow, full RSA PKCS #1, PKCS #5, ASN.1 DER and MPI in +roughly 80KB of code. + +CFLAGS="-DSC_RSA_1 -DLTC_NO_CIPHERS -DLTC_NO_HASHES -DLTC_NO_PRNGS -DLTC_NO_MACS -DLTC_NO_MODES -DLTC_NO_PK -DRIJNDAEL -DCTR -DSHA256 \ +-DHMAC -DYARROW -DMRSA -DMPI -Os -fomit-frame-pointer" make IGNORE_SPEED=1 + +Neato eh?