Mercurial > dropbear
comparison libtomcrypt/notes/tech0005.txt @ 302:973fccb59ea4 ucc-axis-hack
propagate from branch 'au.asn.ucc.matt.dropbear' (head 11034278bd1917bebcbdc69cf53b1891ce9db121)
to branch 'au.asn.ucc.matt.dropbear.ucc-axis-hack' (head 10a1f614fec73d0820c3f61160d9db409b9beb46)
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sat, 25 Mar 2006 12:59:58 +0000 |
| parents | 1b9e69c058d2 |
| children | 0cbe8f6dbf9e |
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| 299:740e782679be | 302:973fccb59ea4 |
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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? |