Mercurial > dropbear
comparison notes/tech0005.txt @ 209:39d5d58461d6 libtomcrypt-orig LTC_1.05
Import of libtomcrypt 1.05
| author | Matt Johnston <matt@ucc.asn.au> |
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| date | Wed, 06 Jul 2005 03:53:40 +0000 |
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| children | d5faf4814ddb |
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| 191:1c15b283127b | 209:39d5d58461d6 |
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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? |