comparison libtomcrypt/notes/tech0005.txt @ 285:1b9e69c058d2

propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:58 +0000
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1 Tech Note 0005
2 Minimizing Code Space
3 Tom St Denis
4
5 Introduction
6 ------------
7
8 Tweaking...
9
10 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.
11
12 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
13 roughly 80KB of code.
14
15 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 \
16 -DHMAC -DYARROW -DMRSA -DMPI -Os -fomit-frame-pointer" make IGNORE_SPEED=1
17
18 Neato eh?