92 lines
2.1 KiB
NASM
92 lines
2.1 KiB
NASM
;
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; *
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; * Copyright (c) 2009-2010
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; * ntldr <ntldr@diskcryptor.net> PGP key ID - 0x1B6A24550F33E44A
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; *
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; This program is free software: you can redistribute it and/or modify
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; it under the terms of the GNU General Public License version 3 as
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; published by the Free Software Foundation.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;
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%define NEH_LOAD_KEY 00000080h ; load schedule from memory
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%define NEH_ENCRYPT 00000000h ; encryption
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%define NEH_DECRYPT 00000200h ; decryption
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%define NEH_KEY128 00000000h+0ah ; 128 bit key
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%define NEH_KEY192 00000400h+0ch ; 192 bit key
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%define NEH_KEY256 00000800h+0eh ; 256 bit key
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%define NEH_ENC_LOAD (NEH_ENCRYPT | NEH_LOAD_KEY)
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%define NEH_DEC_LOAD (NEH_DECRYPT | NEH_LOAD_KEY)
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align 16
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enc_cwd dd (NEH_ENC_LOAD | NEH_KEY256), 0, 0
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align 16
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dec_cwd dd (NEH_DEC_LOAD | NEH_KEY256), 0, 0
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global aes256_padlock_available
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global aes256_padlock_encrypt
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global aes256_padlock_decrypt
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aes256_padlock_available:
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push rbx
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; test for VIA CPU
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mov eax, 0C0000000h
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cpuid
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cmp eax, 0C0000001h
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jb no_ace
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; read VIA flags
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mov eax, 0C0000001h
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cpuid
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and edx, 0C0h ; ACE_MASK,CPUID EDX code for ACE
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cmp edx, 0C0h ; ACE_MASK,CPUID EDX code for ACE
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jnz no_ace
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; ACE present
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xor rax, rax
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inc eax
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jmp end_ace
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no_ace:
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xor rax, rax
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end_ace:
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pop rbx
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ret
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align 16
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aes256_padlock_encrypt:
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push rbx
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push rsi
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push rdi
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mov rsi, rcx ; in
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mov rdi, rdx ; out
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mov rcx, r8 ; n_blocks
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mov rbx, r9 ; key
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lea rdx, [rel enc_cwd]
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xcryptecb
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pop rdi
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pop rsi
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pop rbx
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ret
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align 16
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aes256_padlock_decrypt:
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push rbx
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push rsi
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push rdi
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mov rsi, rcx ; in
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mov rdi, rdx ; out
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mov rcx, r8 ; n_blocks
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lea rbx, [r9+4*15*4] ; key
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lea rdx, [rel dec_cwd]
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xcryptecb
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pop rdi
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pop rsi
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pop rbx
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ret
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