Commit Graph

30 Commits

Author SHA1 Message Date
Matt Johnston
d277f140ba merge rsa-sha256 2020-05-26 00:24:02 +08:00
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
Matt Johnston
331d4a714f Make server send SSH_MSG_EXT_INFO
Ensure that only valid hostkey algorithms are sent in the first kex guess
2020-05-21 23:00:22 +08:00
Matt Johnston
5acee497bf ext-info handling for server-sig-algs
only client side is handled
2020-05-19 00:31:41 +08:00
Matt Johnston
7dc2f36c3e use sigtype where appropriate 2020-04-06 23:18:26 +08:00
Francois Perrad
89e64c631e Pointer parameter could be declared as pointing to const 2017-08-19 17:16:13 +02:00
Matt Johnston
32a28d0d9c Convert #ifdef to #if, other build changes 2016-05-04 15:33:40 +02:00
Matt Johnston
d6daad29fc options for disabling "normal" DH 2016-05-02 23:48:16 +02:00
Gaël PORTAY
6b90885d4f Turn Algo_Type's name attribute into const char * 2015-05-05 20:39:14 +02:00
Thorsten Horstmann
fdb7ffa864 DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
Matt Johnston
a7a79d569a Disable non-delayed zlib for server 2015-01-28 21:38:27 +08:00
Matt Johnston
de1deaf0bd use oldstyle comments 2013-11-14 22:03:30 +08:00
Matt Johnston
e60a84d0ed Various cleanups and fixes for warnings
--HG--
branch : ecc
2013-11-12 23:02:32 +08:00
Matt Johnston
0162c116da curve25519
--HG--
branch : ecc
2013-11-08 23:11:43 +08:00
Matt Johnston
04518e9e80 merge in HEAD
--HG--
branch : ecc
2013-05-21 12:09:35 +08:00
Matt Johnston
5c87c6a435 A bit of work on ecdsa for host/auth keys
--HG--
branch : ecc
2013-04-14 00:50:03 +08:00
Matt Johnston
7f091e7019 start on ecdsa keys
--HG--
branch : ecc
2013-04-09 00:36:04 +08:00
Matt Johnston
c6bdc810ab ecc kind of works, needs fixing/testing
--HG--
branch : ecc
2013-04-07 01:36:42 +08:00
Matt Johnston
9c7485331a Get rid of client/server specific buf_match_algo, use single
function with a couple of if statements instead

--HG--
branch : kexguess
2013-03-30 23:55:05 +08:00
Matt Johnston
99d9cf500b Add kexguess2 behaviour
--HG--
branch : kexguess
2013-03-29 23:29:48 +08:00
Matt Johnston
b4bcc60657 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
ses.hash and ses.session_id are now buffers (doesn't compile)

--HG--
branch : ecc
2013-03-29 00:28:09 +08:00
Matt Johnston
74cad1612f more bits on ecc branch
--HG--
branch : ecc
2013-03-27 00:38:03 +08:00
Matt Johnston
73e22c115c refactor kexdh code a bit, start working on ecdh etc
--HG--
branch : ecc
2013-03-26 01:35:22 +08:00
Matt Johnston
db34044c7f ENABLE_USER_ALGO_LIST should work for the client 2012-05-17 00:26:12 +08:00
Matt Johnston
036edd6206 Add rough support for choosing ciphers/hashes with "-c" or "-m" 2012-05-17 00:12:42 +08:00
Matt Johnston
e3ca0513a0 - Disable compression for non-final multihops
--HG--
extra : convert_revision : c507a2aacb9e0db4c0266891b8915c614e32857e
2009-09-11 14:02:04 +00:00
Matt Johnston
511f6555c9 - Add Counter Mode support
--HG--
extra : convert_revision : 5225162bdf32d70b58b6d3ae375a290326c59f3a
2008-09-29 13:53:31 +00:00
Matt Johnston
7b403dc57f Switching to libtomcrypt 1.02
(still has problems)

--HG--
extra : convert_revision : 4dfd70544ed9a766876ddda9f6ac3f26054eb3db
2005-05-09 09:32:33 +00:00
Matt Johnston
a9c38fb37f snapshot of stuff
--HG--
extra : convert_revision : 2903853ba24669d01547710986ad531357602633
2004-07-26 02:44:20 +00:00
Matt Johnston
674a607488 Makefile.in contains updated files required
--HG--
extra : convert_revision : cc8a8c49dc70e632c352853a39801089b08149be
2004-06-01 02:46:09 +00:00