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d3d0d60076
dropbear/libtomcrypt
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Vladislav Grishenko d3d0d60076
Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) 
* Add Chacha20-Poly1305 authenticated encryption

* Add general AEAD approach.
* Add chacha20-poly1305@openssh.com algo using LibTomCrypt chacha and
  poly1305 routines.

Chacha20-Poly1305 is generally faster than AES256 on CPU w/o dedicated
AES instructions, having the same key size.
Compiling in will add ~5,5kB to binary size on x86-64.

function                                             old     new   delta
chacha_crypt                                           -    1397   +1397
_poly1305_block                                        -     608    +608
poly1305_done                                          -     595    +595
dropbear_chachapoly_crypt                              -     457    +457
.rodata                                            26976   27392    +416
poly1305_process                                       -     290    +290
poly1305_init                                          -     221    +221
chacha_setup                                           -     218    +218
encrypt_packet                                      1068    1270    +202
dropbear_chachapoly_getlength                          -     147    +147
decrypt_packet                                       756     897    +141
chacha_ivctr64                                         -     137    +137
read_packet                                          543     637     +94
dropbear_chachapoly_start                              -      94     +94
read_kex_algos                                       792     880     +88
chacha_keystream                                       -      69     +69
dropbear_mode_chachapoly                               -      48     +48
sshciphers                                           280     320     +40
dropbear_mode_none                                    24      48     +24
dropbear_mode_ctr                                     24      48     +24
dropbear_mode_cbc                                     24      48     +24
dropbear_chachapoly_mac                                -      24     +24
dropbear_chachapoly                                    -      24     +24
gen_new_keys                                         848     854      +6
------------------------------------------------------------------------------
(add/remove: 14/0 grow/shrink: 10/0 up/down: 5388/0)         Total: 5388 bytes

* Add AES128-GCM and AES256-GCM authenticated encryption

* Add general AES-GCM mode.
* Add aes128-gcm@openssh.com and aes256-gcm@openssh.com algo using
  LibTomCrypt gcm routines.

AES-GCM is combination of AES CTR mode and GHASH, slower than AES-CTR on
CPU w/o dedicated AES/GHASH instructions therefore disabled by default.
Compiling in will add ~6kB to binary size on x86-64.

function                                             old     new   delta
gcm_process                                            -    1060   +1060
.rodata                                            26976   27808    +832
gcm_gf_mult                                            -     820    +820
gcm_add_aad                                            -     660    +660
gcm_shift_table                                        -     512    +512
gcm_done                                               -     471    +471
gcm_add_iv                                             -     384    +384
gcm_init                                               -     347    +347
dropbear_gcm_crypt                                     -     309    +309
encrypt_packet                                      1068    1270    +202
decrypt_packet                                       756     897    +141
gcm_reset                                              -     118    +118
read_packet                                          543     637     +94
read_kex_algos                                       792     880     +88
sshciphers                                           280     360     +80
gcm_mult_h                                             -      80     +80
dropbear_gcm_start                                     -      62     +62
dropbear_mode_gcm                                      -      48     +48
dropbear_mode_none                                    24      48     +24
dropbear_mode_ctr                                     24      48     +24
dropbear_mode_cbc                                     24      48     +24
dropbear_ghash                                         -      24     +24
dropbear_gcm_getlength                                 -      24     +24
gen_new_keys                                         848     854      +6
------------------------------------------------------------------------------
(add/remove: 14/0 grow/shrink: 10/0 up/down: 6434/0)         Total: 6434 bytes
2020-05-25 23:50:25 +08:00
..
demos Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
doc Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
notes Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
src Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) 2020-05-25 23:50:25 +08:00
testprof update to libtomcrypt 1.17 (with Dropbear changes) 2017-06-24 17:50:50 +08:00
tests Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
.travis.yml Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
build.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
changes Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
check_source.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
coverage_more.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
coverage.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
coverity.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
crypt.lof update to libtomcrypt 1.17 (with Dropbear changes) 2017-06-24 17:50:50 +08:00
Doxyfile update to libtomcrypt 1.17 (with Dropbear changes) 2017-06-24 17:50:50 +08:00
filter.pl propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f) 2007-01-11 02:41:05 +00:00
fixupind.pl propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f) 2007-01-11 02:41:05 +00:00
genlist.sh propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f) 2007-01-11 02:41:05 +00:00
helper.pl Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
LICENSE Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
makefile_include.mk Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
makefile.icc update to libtomcrypt 1.17 (with Dropbear changes) 2017-06-24 17:50:50 +08:00
Makefile.in use parent $CC etc 2018-02-10 18:57:20 +08:00
makefile.mingw Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
makefile.msvc Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
makefile.shared Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
makefile.unix Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
mess.sh propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f) 2007-01-11 02:41:05 +00:00
parsenames.pl propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) 2006-03-08 13:23:58 +00:00
printinfo.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
README propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f) 2007-01-11 02:41:05 +00:00
run.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
scan_build.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
testbuild.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
testme.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00
TODO update to libtomcrypt 1.17 (with Dropbear changes) 2017-06-24 17:50:50 +08:00
updatemakes.sh Update to libtomcrypt 1.18.1, merged with Dropbear changes 2018-02-09 21:44:05 +08:00

README 

See doc/crypt.pdf