busybox-w32/networking/tls_aesgcm.c, branch zstd

libbb: introduce and use block-XOR functions

2025-07-09T05:00:59+00:00

On x86_64, they can be done in 16-byte blocks 64-bit: function old new delta xorbuf_3 - 84 +84 xorbuf64_3_aligned64 - 58 +58 smix1 687 712 +25 xwrite_encrypted 520 534 +14 xorbuf16_aligned_long - 13 +13 tls_xread_record 733 742 +9 xorbuf 21 13 -8 xorbuf_aligned_AES_BLOCK_SIZE 15 - -15 blockmix 814 762 -52 blockmix_salsa8 317 198 -119 blockmix_xor_save 1620 1499 -121 blockmix_xor 1543 1322 -221 ------------------------------------------------------------------------------ (add/remove: 4/1 grow/shrink: 3/5 up/down: 203/-536) Total: -333 bytes 32-bit: function old new delta xorbuf_3 - 76 +76 xorbuf64_3_aligned64 - 36 +36 xorbuf16_aligned_long - 23 +23 xwrite_encrypted 499 507 +8 tls_xread_record 646 650 +4 xorbuf 22 11 -11 xorbuf_aligned_AES_BLOCK_SIZE 23 - -23 blockmix 1083 938 -145 blockmix_salsa8 415 210 -205 blockmix_salsa8_xor 601 163 -438 blockmix_xor 2103 1533 -570 blockmix_xor_save 2614 1859 -755 ------------------------------------------------------------------------------ (add/remove: 4/1 grow/shrink: 2/6 up/down: 147/-2147) Total: -2000 bytes Signed-off-by: Denys Vlasenko

suppress a few "unused function" warnings

2019-10-25T11:05:15+00:00

Signed-off-by: Denys Vlasenko

tls: AES-GCM: in GMULT, avoid memcpy, use one less variable in bit loop

2018-12-08T20:24:38+00:00

function old new delta GMULT 168 159 -9 Signed-off-by: Denys Vlasenko

tls: make RIGHTSHIFTX() in AES-GCM faster

2018-12-08T12:34:43+00:00

Signed-off-by: Denys Vlasenko

tls: code shrink

2018-11-25T13:03:59+00:00

function old new delta aesgcm_GHASH 223 196 -27 Signed-off-by: Denys Vlasenko

tls: on x86, use xorbuf_aligned_AES_BLOCK_SIZE() even with non-aligned source

2018-11-25T11:02:45+00:00

function old new delta aesgcm_GHASH 228 223 -5 Signed-off-by: Denys Vlasenko

tls: speed up xor'ing of aligned 16-byte buffers

2018-11-24T13:08:29+00:00

function old new delta xorbuf_aligned_AES_BLOCK_SIZE - 23 +23 xwrite_encrypted 585 580 -5 aesgcm_GHASH 233 228 -5 GMULT 192 187 -5 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/3 up/down: 23/-15) Total: 8 bytes Signed-off-by: Denys Vlasenko

tls: in AES-GCM decoding, avoid memmove

2018-11-24T12:51:46+00:00

function old new delta xorbuf3 - 36 +36 xorbuf 24 12 -12 tls_xread_record 656 634 -22 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/2 up/down: 36/-34) Total: 2 bytes Signed-off-by: Denys Vlasenko

tls: fix a thinko in GHASH optimization

2018-11-24T12:47:44+00:00

Signed-off-by: Denys Vlasenko

tls: code shrink

2018-11-23T18:07:05+00:00

function old new delta aesgcm_GHASH 262 233 -29 Signed-off-by: Denys Vlasenko