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Pad with 0 bytes before encryption is set, as not to leak any entropy of RNG.

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Little improved RNG seeding.
Fixed bug in MAC counter for SSH transport.

git-svn-id: svn://kolibrios.org@9071 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr
2021-07-21 10:53:13 +00:00
parent 66f0a0e45d
commit 4f24fcab0f
4 changed files with 138 additions and 45 deletions
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77
programs/network/ssh/seed.inc Normal file
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@@ -0,0 +1,77 @@
; seed.inc - Collect some entropy from KolibriOS system
;
; Copyright (C) 2021 Jeffrey Amelynck
;
; This program is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program. If not, see <http://www.gnu.org/licenses/>.
align 4
create_seed:
push ebx edx
mcall 3 ; System time
xor edx, eax
rol edx, 1
mcall 14 ; Screen size
xor edx, eax
rol edx, 1
mcall 18, 4 ; Idle time counter
xor edx, eax
rol edx, 1
mcall 18, 5 ; CPU clock rate
xor edx, eax
rol edx, 1
mcall 18, 7 ; Active window slot
xor edx, eax
rol edx, 1
mcall 18, 16 ; Free RAM space
xor edx, eax
rol edx, 1
mcall 18, 17 ; Total RAM space
xor edx, eax
rol edx, 1
mcall 18, 21 ; Active window slot
xor edx, eax
rol edx, 1
mcall 26, 10 ; High precision time counter
xor edx, eax
rol edx, 1
xor edx, ebx
rol edx, 1
mcall 37, 0 ; Screen coordinates of the cursor
xor edx, eax
rol edx, 1
mcall 54, 0 ; Number of slots on the clipboard
xor edx, eax
rol edx, 1
mcall 66, 3 ; Status of the keyboard control keys
xor edx, eax
rol edx, 1
mcall 68, 0 ; Task switch counter
xor edx, eax
rol edx, 1
mcall 74, 0x108 ; Network interface 1 TX bytes counter
xor edx, eax
rol edx, 1
mcall 74, 0x109 ; Network interface 1 RX bytes counter
xor edx, eax
rol edx, 1
mcall 76, 0x100 ; Network interface 1 MAC address
xor eax, ebx
xor eax, edx
pop edx ebx
ret