+/* noekeon_asm.S */
+/*
+ This file is part of the Crypto-avr-lib/microcrypt-lib.
+ Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
+
+ 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/>.
+*/
/*
* noekeon assembler implementation for avr
* author: Daniel Otte
clr r1
.endm
+push_all_func:
+ pop r31
+ pop r30
+ push_all
+ ijmp
+
+pop_all_func:
+ pop r31
+ pop r30
+ pop_all
+ ijmp
+
.macro xchg a b
eor \a, \b
eor \b, \a
ret
/******************************************************************************/
+#ifndef NOEKEON_NO_ENC
; === noekeon_enc ===
;
; param1: pointer to buffer/state (r24,r25)
;
.global noekeon_enc
noekeon_enc:
- push_all
+ rcall push_all_func
/* load state */
movw r26, r22
ldi r28, 2
lpm r0, Z
push r0
3:
- call round /* pops rc2 & rc1 */
+ rcall round /* pops rc2 & rc1 */
pop r22
dec r22
push r22
ldi r22, 0xD4
eor state0_3, r22
- call theta
+ rcall theta
pop r31
pop r30
dec r22
brne 1b
- pop_all
+ rcall pop_all_func
ret
+#endif
/******************************************************************************/
/******************************************************************************/
+#ifndef NOEKEON_NO_DEC
+
; === noekeon_dec ===
;
; param1: pointer to buffer/state (r24,r25)
;
.global noekeon_dec
noekeon_dec:
- push_all
+ rcall push_all_func
/* allocate 16 bytes on the stack */
in r30, _SFR_IO_ADDR(SPL)
in r31, _SFR_IO_ADDR(SPH)
movw r26, r30
sbiw r26, 16 /* set X back to begining of stack key */
- call theta
+ rcall theta
/* mov state to stackkey */
clr r29
push r0
push r1
3:
- call round /* pops rc2 & rc1 */
+ rcall round /* pops rc2 & rc1 */
pop r22
dec r22
push r22
;----
pop r22
- call theta
+ rcall theta
ldi r22, 0x80
eor state0_3, r22
adiw r30, 16
out _SFR_IO_ADDR(SPH), r31
out _SFR_IO_ADDR(SPL), r30
- pop_all
+ rcall pop_all_func
ret
+#endif
/******************************************************************************/
+
round:
pop r24
pop r25
pop r1
eor state0_3, r1
- call theta
+ rcall theta
pop r1
eor state0_3, r1
push r25
pi_gamma_pi:
ldi r30, pm_lo8(bigendian_rotl32)
ldi r31, pm_hi8(bigendian_rotl32)
- call pi
+ rcall pi
/* pi1 done; now gamma */
- call gamma_1
+ rcall gamma_1
/* a[0] <-> a[3] */
xchg state0_0, state3_0
xchg state0_1, state3_1
op32 eor, state2, state1
op32 eor, state2, state3
- call gamma_1
+ rcall gamma_1
ldi r30, pm_lo8(bigendian_rotr32)
ldi r31, pm_hi8(bigendian_rotr32)
- call pi
+ rcall pi
ret
gamma_1:
noekeon_enc(ctx, nullv);
}
*/
+
+#ifndef NOEKEON_NO_INIT
+
.global noekeon_init
noekeon_init:
; === noekeon_init ===
sbiw r26, 16
movw r24, r26
- call noekeon_enc
+ rcall noekeon_enc
in r30, _SFR_IO_ADDR(SPL)
in r31, _SFR_IO_ADDR(SPH)
out _SFR_IO_ADDR(SPL), r30
ret
-
+#endif