diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2017-04-01 20:11:59 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2017-04-01 20:11:59 +0200 |
| commit | 6e99f1cb45621d36958fa97943074d9c5e2e9306 (patch) | |
| tree | 8f17a96c9df15c2f7f8f49786c42d3efe4c1ed4c /networking/tls_pstm.c | |
| parent | 8808f7fc2ec434621a213c1deb5966833bcfec58 (diff) | |
| download | busybox-6e99f1cb45621d36958fa97943074d9c5e2e9306.tar.gz | |
tls: replace aes encryption/decryption by much smaller one
The replacement code is ~6 times slower,
but drastically decreases size of tls_aes.o:
text data bss dec hex filename
8050 0 0 8050 1f72 tls_aes_OLD.o
2461 0 0 2461 99d tls_aes.o
function old new delta
sbox - 256 +256
rsbox - 256 +256
KeyExpansion - 197 +197
Subword - 66 +66
AddRoundKey - 61 +61
static.Rcon - 10 +10
rcon 40 - -40
setup_mix 80 - -80
setup_mix2 123 - -123
aes_cbc_decrypt 1377 971 -406
aes_cbc_encrypt 1375 644 -731
psAesInit 848 - -848
Te4 1024 - -1024
TE0 1024 - -1024
TD0 1024 - -1024
Td4 1040 - -1040
------------------------------------------------------------------------------
(add/remove: 6/8 grow/shrink: 0/2 up/down: 846/-6340) Total: -5494 bytes
This code is based on public domain "tiny-AES128-C" code.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/tls_pstm.c')
0 files changed, 0 insertions, 0 deletions