tls: replace aes encryption/decryption by much smaller one

Browse Source

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>

...

This commit is contained in:

Denys Vlasenko 2017-04-01 20:11:59 +02:00

parent 8808f7fc2e

commit 6e99f1cb45

1 changed files with 441 additions and 1757 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2198

networking/tls_aes.c

View File

File diff suppressed because it is too large Load Diff