busybox-w32/networking/tls_aes.c, branch cron_changes

tls: code shrink in AES code

2020-12-15T17:47:25+00:00

function old new delta aes_cbc_decrypt 862 847 -15 Signed-off-by: Denys Vlasenko

*: slap on a few ALIGN1/2s where appropriate

2019-05-21T15:29:24+00:00

The result of looking at "grep -F -B2 '*fill*' busybox_unstripped.map" text data bss dec hex filename 952537 485 7296 960318 ea73e busybox_old 952527 485 7296 960308 ea734 busybox_unstripped Signed-off-by: Denys Vlasenko

tls: in AES-CBC code, do not set key for every record - do it once

2018-11-23T17:02:44+00:00

function old new delta aes_setkey 16 212 +196 tls_handshake 1941 1977 +36 aes_encrypt_1 382 396 +14 xwrite_encrypted 605 604 -1 tls_xread_record 659 656 -3 aes_encrypt_one_block 65 59 -6 aes_cbc_encrypt 172 121 -51 aesgcm_setkey 58 - -58 aes_cbc_decrypt 958 881 -77 KeyExpansion 188 - -188 ------------------------------------------------------------------------------ (add/remove: 0/2 grow/shrink: 3/5 up/down: 246/-384) Total: -138 bytes Signed-off-by: Denys Vlasenko

tls: add support for TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 cipher

2018-11-23T16:48:07+00:00

function old new delta xwrite_encrypted 209 605 +396 GHASH - 395 +395 aes_encrypt_1 - 382 +382 GMULT - 192 +192 tls_xread_record 489 659 +170 aes_encrypt_one_block - 65 +65 aesgcm_setkey - 58 +58 FlattenSzInBits - 52 +52 tls_handshake 1890 1941 +51 xwrite_and_update_handshake_hash 46 81 +35 xorbuf - 24 +24 aes_setkey - 16 +16 psRsaEncryptPub 413 421 +8 stty_main 1221 1227 +6 ssl_client_main 138 143 +5 next_token 841 845 +4 spawn_ssl_client 218 219 +1 volume_id_probe_hfs_hfsplus 564 563 -1 read_package_field 232 230 -2 i2cdetect_main 674 672 -2 fail_hunk 139 136 -3 parse_expr 891 883 -8 curve25519 802 793 -9 aes_cbc_decrypt 971 958 -13 xwrite_handshake_record 43 - -43 aes_cbc_encrypt 644 172 -472 ------------------------------------------------------------------------------ (add/remove: 9/1 grow/shrink: 9/8 up/down: 1860/-553) Total: 1307 bytes Signed-off-by: Denys Vlasenko

Move get_unaligned_le32() macros to platform.h

2017-07-15T18:22:25+00:00

Signed-off-by: Denys Vlasenko

tls: replace aes encryption/decryption by much smaller one

2017-04-01T18:11:59+00:00

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

tls: fold AES CBC en/decryption into single functions

2017-02-04T15:23:49+00:00

Signed-off-by: Denys Vlasenko

tls: commented out psPool_t use

2017-01-19T14:51:00+00:00

function old new delta psAesEncrypt 159 162 +3 der_binary_to_pstm 42 40 -2 xwrite_and_hash 437 434 -3 xread_tls_block 446 443 -3 pstm_div_2d 449 444 -5 psAesDecrypt 179 174 -5 pstm_init_size 52 45 -7 pstm_init 46 39 -7 pstm_to_unsigned_bin 165 157 -8 tls_main 1265 1256 -9 pstm_mulmod 132 123 -9 pstm_mod 125 116 -9 pstm_init_copy 93 84 -9 psAesInitKey 840 825 -15 send_client_key_exchange 362 342 -20 psAesInit 103 80 -23 psRsaEncryptPub 429 403 -26 psAesDecryptBlock 1211 1184 -27 psAesEncryptBlock 1223 1193 -30 pstm_exptmod 1582 1524 -58 pstm_div 1557 1472 -85 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/20 up/down: 3/-360) Total: -357 bytes Signed-off-by: Denys Vlasenko

tls: added AES code and made it compile. not used yet

2017-01-18T16:20:27+00:00

Signed-off-by: Denys Vlasenko