Mercurial > dropbear
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 |
| parents | |
| children | 0cbe8f6dbf9e |
comparison
equal
deleted
inserted
replaced
| 281:997e6f7dc01e | 285:1b9e69c058d2 |
|---|---|
| 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? |