X-Git-Url: https://git.cryptolib.org/?p=avr-crypto-lib.git;a=blobdiff_plain;f=bmw%2Fbmw_small-tinyasm.S;h=04dea66eaf9de3b725bc28ecb686b30f9cc0ec5f;hp=de7ff5a2f62360952f9700b0d7fdc3020cf5f7d0;hb=4b5da1dc27a791b5c448274a3db09cd035b33493;hpb=7bc75db2cff11a8a8b347e27dec3f4e019418d52 diff --git a/bmw/bmw_small-tinyasm.S b/bmw/bmw_small-tinyasm.S index de7ff5a..04dea66 100644 --- a/bmw/bmw_small-tinyasm.S +++ b/bmw/bmw_small-tinyasm.S @@ -1,7 +1,7 @@ /* bmw_small-tinyasm.S */ /* This file is part of the AVR-Crypto-Lib. - Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de) + Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org) 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 @@ -28,12 +28,24 @@ #include "avr-asm-macros.S" +acc2 = 8 +acc3 = 9 +acc0 = 14 +acc1 = 15 + +#define DEBUG 0 + /******************************************************************************/ /* param a: r22:r23:r24:r25 param s: r20 */ shiftleft32: + tst r20 + brpl 10f + neg r20 + rjmp shiftright32 +10: clr r0 cpi r20, 8 brlo bitrotateleft_1 @@ -42,7 +54,7 @@ shiftleft32: mov r23, r22 clr r22 subi r20, 8 - rjmp shiftleft32 + rjmp 10b /******************************************************************************/ /* @@ -91,6 +103,7 @@ bitrotateleft_1: breq 20f 10: lsl r0 +rol32: rol r22 rol r23 rol r24 @@ -102,6 +115,18 @@ bitrotateleft_1: /******************************************************************************/ +sn_stub: + movw r22, r2 + movw r24, r4 + lpm r20, Z+ + rcall rotateleft32 +eor32_to_acc: + eor acc0, r22 + eor acc1, r23 + eor acc2, r24 + eor acc3, r25 + ret + s_table: s0: .byte 1, 3, 4,19 s1: .byte 1, 2, 8,23 @@ -110,12 +135,10 @@ s3: .byte 2, 2,15,29 s4: .byte 1, 0, 0, 0 s5: .byte 2, 0, 0, 0 -eor_r22_in_r16: - eor r16, r22 - eor r17, r23 - eor r18, r24 - eor r19, r25 - ret +h0 = 10 +h1 = 11 +m0 = 12 +m1 = 13 /* param x: r22:r23:r24:25 @@ -123,8 +146,10 @@ eor_r22_in_r16: */ sn: push_range 2, 5 - push r17 - push r19 + push acc0 + push acc1 + push acc2 + push acc3 ldi r30, lo8(s_table) ldi r31, hi8(s_table) lsl r20 @@ -135,32 +160,24 @@ sn: movw r4, r24 lpm r20, Z+ rcall shiftright32 - movw r16, r22 - movw r18, r24 + rcall mov32_to_acc ;--- movw r22, r2 movw r24, r4 lpm r20, Z+ rcall shiftleft32 - rcall eor_r22_in_r16 -;--- - movw r22, r2 - movw r24, r4 - lpm r20, Z+ - rcall rotateleft32 - rcall eor_r22_in_r16 + rcall eor32_to_acc ;--- - movw r22, r2 - movw r24, r4 - lpm r20, Z+ - rcall rotateleft32 - rcall eor_r22_in_r16 - movw r22, r16 - movw r24, r18 - pop r19 - pop r17 - pop_range 2, 5 - ret + rcall sn_stub + rcall sn_stub + + movw r22, acc0 + movw r24, acc2 + pop acc3 + pop acc2 + pop acc1 + pop acc0 + rjmp pop5 /******************************************************************************/ /* @@ -168,10 +185,11 @@ sn: param src: r30:r31 (Z) param len: r20 */ -memxor_short: +memxor_64: ; tst r20 ; breq memxor_exit ldi r20, 64 +memxor: 10: ld r21, X ld r22, Z+ eor r21, r22 @@ -222,6 +240,19 @@ add_X_to_32: ld r0, X+ adc r25, r0 ret + +store32_to_X: + st X+, r22 + st X+, r23 + st X+, r24 + st X+, r25 + ret + +mov32_to_acc: + movw acc0, r22 + movw acc2, r24 + ret + /******************************************************************************/ /* param q: r28:r29 (Y) @@ -229,32 +260,26 @@ add_X_to_32: param m: r30:r31 (Z) */ -f0_hacktable: - .byte 0x03, 0x11 - .byte 0xDD, 0xB3 - .byte 0x2A, 0x79 - .byte 0x07, 0xAA - .byte 0x51, 0xC2 -f0_indextable: - .byte 5*4,7*4,10*4,13*4,14*4 -; .byte 0 ; just for alignment -f0_s_table: - .byte 0,1,2,3,4 - .byte 0,1,2,3,4 - .byte 0,1,2,3,4 -; .byte 0 - +f2_1_shift_table: +; .byte 0x2B, 0x64, 0x66, 0x03, 0x51, 0x55, 0x87, 0x55 +; .byte 0x55, 0x87, 0x55, 0x51, 0x03, 0x66, 0x64, 0x2B + .byte 5, -5, -7, 8, -5, 5, -1, 5, -3, 0, 6, -6, -4, 6, -11, 2 +f2_2_shift_table: +; .byte (2<<1), (7<<1), (4<<1), (3<<1), (4<<1)+1, (6<<1)+1, (6<<1) + .byte 8, -6, 6, 4, -3, -4, -7, -2 +expand2_rot_table: + .byte 3,7,13,16,19,23,27 -/******************************************************************************/ +f0_hacktable: + .byte 0x03, 0x11, 5*4 + .byte 0xDD, 0xB3, 7*4 + .byte 0x2A, 0x79, 10*4 + .byte 0x07, 0xAA, 13*4 + .byte 0x51, 0xC2, 14*4 -const_lut: - .long 0x55555550, 0x5aaaaaa5, 0x5ffffffa, 0x6555554f - .long 0x6aaaaaa4, 0x6ffffff9, 0x7555554e, 0x7aaaaaa3 - .long 0x7ffffff8, 0x8555554d, 0x8aaaaaa2, 0x8ffffff7 - .long 0x9555554c, 0x9aaaaaa1, 0x9ffffff6, 0xa555554b /******************************************************************************* -* uint32_t addelment(uint8_t j, const uint32_t* m, const uint32_t* h){ +* uint32_t addelment(uint8_t j, const uint32_t *m, const uint32_t *h){ * uint32_t r; * r = pgm_read_dword(k_lut+j); * r += rotl_addel(((uint32_t*)m)[j&0xf], j+0); @@ -277,20 +302,6 @@ m1 = 13 acc0 = 14 acc1 = 15 -add32_to_acc: - add acc0, r22 - adc acc1, r23 - adc acc2, r24 - adc acc3, r25 - ret - -eor32_to_acc: - eor acc0, r22 - eor acc1, r23 - eor acc2, r24 - eor acc3, r25 - ret - load_acc_from_X: ld acc0, X+ ld acc1, X+ @@ -298,22 +309,23 @@ load_acc_from_X: ld acc3, X+ ret -add_acc_to_Z: - ld r0, Z +add_acc_to_X: + ld r0, X add r0, acc0 - st Z+, r0 - ld r0, Z + st X+, r0 + ld r0, X adc r0, acc1 - st Z+, r0 - ld r0, Z + st X+, r0 + ld r0, X adc r0, acc2 - st Z+, r0 - ld r0, Z + st X+, r0 + ld r0, X adc r0, acc3 - st Z+, r0 + st X+, r0 ret load_rotate_add_M: + mov r20, j andi r20, 0x0f mov r0, r20 lsl r0 @@ -325,71 +337,71 @@ load_rotate_add_M: inc r20 rcall rotateleft32 brts 10f - rcall add32_to_acc - ret + rjmp add32_to_acc +; ret 10: sub acc0, r22 sbc acc1, r23 sbc acc2, r24 sbc acc3, r25 ret + +;--- + +/******************************************************************************/ +load_sn_add: + rcall load32_from_X + rcall sn +add32_to_acc: + add acc0, r22 + adc acc1, r23 + adc acc2, r24 + adc acc3, r25 + ret + +/* + param q: r26:r27 + param m: r22:r23 + param h: r20:r21 + param j: r24 +*/ + +expand_intro: + push_range 26, 27 + push r24 addelement: mov j, r24 movw h0, r20 movw m0, r22 - lsl r24 - lsl r24 - mov r28, r24 - ldi r30, lo8(const_lut) - ldi r31, hi8(const_lut) - add r30, r24 - adc r31, r1 - lpm acc0, Z+ - lpm acc1, Z+ - lpm acc2, Z+ - lpm acc3, Z+ + sbiw r26, 4 + rcall load_acc_from_X + ldi r24, 0x55 + add acc0, r24 + adc acc1, r24 + adc acc2, r24 + ldi r24, 5 + adc acc3, r24 + rcall store_acc_to_dec_X + adiw r26, 4 clt - mov r20, j rcall load_rotate_add_M - mov r20, j - subi r20, -3 + subi j, -3 rcall load_rotate_add_M - mov r20, j set - subi r20, -10 + subi j, -7 rcall load_rotate_add_M lsl j lsl j - subi j, -7*4 + subi j, -7*4+10*4 andi j, 0x3f movw r26, h0 add r26, j adc r27, r1 - ld r0, X+ - eor acc0, r0 - ld r0, X+ - eor acc1, r0 - ld r0, X+ - eor acc2, r0 - ld r0, X+ - eor acc3, r0 -;--- - ret - -/******************************************************************************/ -/* - param q: r26:r27 - param m: r22:r23 - param h: r20:r21 - param j: r24 -*/ - -expand_intro: - push_range 20, 27 -; push r24 - rcall addelement -; pop r24 - pop_range 20, 27 + rcall load32_from_X + rcall eor32_to_acc +;-- + pop r24 + pop_range 26, 27 lsl r24 lsl r24 add r26, r24 @@ -399,11 +411,9 @@ expand1: rcall expand_intro ldi r19, 1 10: - rcall load32_from_X mov r20, r19 andi r20, 3 - rcall sn - rcall add32_to_acc + rcall load_sn_add inc r19 cpi r19, 17 brne 10b @@ -418,8 +428,6 @@ expand1: param j: r24 */ -expand2_rot_table: - .byte 0,3,0,7,0,13,0,16,0,19,0,23,0,27 expand2: rcall expand_intro @@ -428,25 +436,24 @@ expand2: ldi r31, hi8(expand2_rot_table) 10: rcall load32_from_X - mov r20, r19 + sbrs r19, 0 + rjmp 12f lpm r20, Z+ rcall rotateleft32 - rcall add32_to_acc +12: rcall add32_to_acc dec r19 brne 10b ldi r20, 4 - rcall load32_from_X - rcall sn - rcall add32_to_acc + rcall load_sn_add ldi r20, 5 - rcall load32_from_X - rcall sn - rcall add32_to_acc + rcall load_sn_add expand2_exit: - st X+, acc0 - st X+, acc1 - st X+, acc2 - st X+, acc3 + adiw r26, 4 +store_acc_to_dec_X: + st -X, acc3 + st -X, acc2 + st -X, acc1 + st -X, acc0 ret /******************************************************************************/ @@ -468,12 +475,6 @@ expand2_exit: param m: r22:r23 param h: r20:r21 */ -f2_1_shift_table: - .byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 - .byte 0x2B, 0x64, 0x66, 0x03, 0x51, 0x55, 0x87, 0x55 -f2_2_shift_table: - .byte (2<<1), (7<<1), (4<<1), (3<<1), (4<<1)+1, (6<<1)+1, (6<<1) - .byte 0 ; just for alignment /******************************************************************************/ /* @@ -501,17 +502,36 @@ h0 = 4 h1 = 5 m0 = 6 m1 = 7 +ctx0 = 2 +ctx1 = 3 +msg0 = 4 +msg1 = 5 - +restore_f1: + movw r26, r2 + movw r22, r4 + movw r20, r6 + ret +bmw_small_nextBlock_early: + movw r24, ctx0 + movw r22, msg0 .global bmw_small_nextBlock .global bmw224_nextBlock .global bmw256_nextBlock bmw_small_nextBlock: bmw224_nextBlock: bmw256_nextBlock: + push_range 2, 7 push_range 28, 29 - push_range 2, 17 + push_range 8, 17 stack_alloc_large 32*4, r28, r29 + ldi r16, 0x4f + push r16 + ldi r16, 0xff + push r16 + push r16 + ldi r16, 0xfb + push r16 adiw r28, 1 ; push_range 28, 29 /* push Q */ ; push_range 22, 25 /* push M & H */ @@ -526,10 +546,7 @@ bmw256_nextBlock: adc acc1, r1 adc acc2, r1 adc acc3, r1 - st -X, acc3 - st -X, acc2 - st -X, acc1 - st -X, acc0 + rcall store_acc_to_dec_X /* call f0 */ movw r30, r22 movw r26, r24 @@ -539,7 +556,7 @@ f0: movw m0, r30 /* xor m into h */ ; ldi r20, 64 - rcall memxor_short + rcall memxor_64 movw r30, m0 movw r26, h0 @@ -554,20 +571,18 @@ f0: 30: ldi r18, 16 /* load initial index */ - ldi r30, lo8(f0_indextable-1) - ldi r31, hi8(f0_indextable-1) - add r30, r19 - adc r31, r1 - lpm r16, Z + /* load values from hacktable */ - ldi r30, lo8(f0_hacktable-2) - ldi r31, hi8(f0_hacktable-2) - lsl r19 - add r30, r19 + ldi r30, lo8(f0_hacktable-3) + ldi r31, hi8(f0_hacktable-3) + mov r16, r19 + lsl r16 + add r16, r19 + add r30, r16 adc r31, r1 - lsr r19 lpm r21, Z+ - lpm r20, Z + lpm r20, Z+ + lpm r16, Z+ 40: ;call add_hx_to_w add_hx_to_w: @@ -583,14 +598,12 @@ add_hx_to_w: rcall add_X_to_32 rjmp 500f 300: /* substract */ - ld r0, X+ - sub r22, r0 - ld r0, X+ - sbc r23, r0 - ld r0, X+ - sbc r24, r0 - ld r0, X+ - sbc r25, r0 + rcall load_acc_from_X + sub r22, acc0 + sbc r23, acc1 + sbc r24, acc2 + sbc r25, acc3 + 500: rcall store32_to_Y subi r16, -4 @@ -605,21 +618,22 @@ add_hx_to_w: ; ldi r20, 64 movw r26, h0 movw r30, m0 - rcall memxor_short + rcall memxor_64 sbiw r26, 60 ;--- - ldi r30, lo8(f0_s_table) - ldi r31, hi8(f0_s_table) + clr r17 ldi r21, 15 mov r8, r21 50: rcall load32_from_Y sbiw r28, 4 - lpm r20, Z+ - movw r2, r30 + mov r20, r17 rcall sn - movw r30, r2 - + inc r17 + cpi r17, 5 + brne 52f + clr r17 +52: rcall add_X_to_32 rcall store32_to_Y @@ -629,44 +643,36 @@ add_hx_to_w: rcall load32_from_Y clr r20 rcall sn - movw r30, r2 movw r26, h0 rcall add_X_to_32 sbiw r26, 4 - st -Y, r25 - st -Y, r24 - st -Y, r23 - st -Y, r22 + sbiw r28, 4 + rcall store32_to_Y + sbiw r28, 4 sbiw r28, 15*4 movw r20, h0 movw r22, m0 /* call f1*/ - movw r24, r28 + movw r2, r28 f1: - movw r2, r24 movw r4, r22 movw r6, r20 movw r26, r2 clr r24 rcall expand1 - movw r26, r2 - movw r22, r4 - movw r20, r6 + rcall restore_f1 ldi r24, 1 rcall expand1 ldi r17, 2 -10: movw r26, r2 - movw r22, r4 - movw r20, r6 +10: rcall restore_f1 mov r24, r17 rcall expand2 inc r17 sbrs r17, 4 rjmp 10b + rcall restore_f1 movw r24, r2 - movw r22, r4 - movw r20, r6 /* call f2 */ @@ -693,15 +699,17 @@ h0 = 18 h1 = 19 f2: movw r26, r24 - /* calc XL */ + /* calc XL & XH */ adiw r26, 63 adiw r26, 1 movw q16_0, r26 movw h0, r20 +;--- +; push h0 +; push h1 +;--- movw r28, r22 - rcall load32_from_X - movw acc0, r22 - movw acc2, r24 + rcall load_acc_from_X ldi r17, 15 10: rcall load32_from_X rcall eor32_to_acc @@ -724,138 +732,111 @@ f2: ; rcall print32 ; pop_range 22, 25 ;--- END DBG - + /* copy m(Y) into h */ + movw r26, h0 + ldi r22, 64 +10: + ld r23, Y+ + st X+, r23 + dec r22 + brne 10b ;--- /* calc first half of h0..h15 */ - movw r26, q16_0 - ldi r17, 16 + movw r28, q16_0 + movw r26, h0 + ldi r30, lo8(f2_1_shift_table) + ldi r31, hi8(f2_1_shift_table) + ldi r17, 15 10: - ld acc0, Y+ - ld acc1, Y+ - ld acc2, Y+ - ld acc3, Y+ ;--- - ldi r30, lo8(f2_1_shift_table-1) - ldi r31, hi8(f2_1_shift_table-1) movw r22, xh0 movw r24, xh2 - add r30, r17 - adc r31, r1 - lpm r20, Z - mov r1, r20 - andi r20, 0x0f - clt - cpi r17, 16 - breq 20f - cpi r17, 11 - brne 21f -20: set -21: brts 25f - rcall shiftright32 - rjmp 26f -25: rcall shiftleft32 -26: rcall eor32_to_acc + lpm r20, Z+ + sbrc r17, 3 + rcall shiftleft32 + rcall mov32_to_acc ;--- - rcall load32_from_X - mov r20, r1 - clr r1 - swap r20 - andi r20, 0x0f - brts 27f + rcall load32_from_Y + lpm r20, Z+ + sbrc r17, 3 rcall shiftleft32 - rjmp 28f -27: rcall shiftright32 -28: rcall eor32_to_acc + rcall eor32_to_acc ;--- - movw r30, h0 - st Z+, acc0 - st Z+, acc1 - st Z+, acc2 - st Z+, acc3 - movw h0, r30 + rcall load32_from_X + rcall eor32_to_acc + rcall store_acc_to_dec_X + adiw r26, 4 ;--- dec r17 - brne 10b + brpl 10b ;----- - sbiw r26, 4*8 /* X points to q[24] */ - movw r28, r26 + sbiw r28, 4*8 /* Y points to q[24] */ + movw r30, r28 sbiw r28, 63 sbiw r28, 33 /* Y points to q[0] */ - sbiw r30, 63 - sbiw r30, 1 /* Z points to h0 */ - ldi r17, 8 -10: movw acc0, xl0 - movw acc2, xl2 - rcall load32_from_X - rcall eor32_to_acc - rcall load32_from_Y - rcall eor32_to_acc - rcall add_acc_to_Z - dec r17 - brne 10b - sbiw r26, 9*4 /* X points to q[23] */ - rcall load_acc_from_X - eor acc1, xl0 - eor acc2, xl1 - eor acc3, xl2 - rcall load32_from_Y - rcall eor32_to_acc - rcall add_acc_to_Z -;--- - sbiw r26, 8*4 /* X points to q[16] */ - mov h0, r30 - ldi r17, 7 -10: - ldi r30, lo8(f2_2_shift_table-1) - ldi r31, hi8(f2_2_shift_table-1) - add r30, r17 - adc r31, r1 - lpm r20, Z - rcall load_acc_from_X - movw r22, xl0 + movw r26, r28 + ldi r20, 8*4 + /* xor q[24..31] into q[0..7] */ + rcall memxor + /* xor q[23] into q[8] */ + sbiw r30, 9*4 + ldi r20, 4 + rcall memxor + /* xor q[16..22] into q[9..15] */ + sbiw r30, 8*4 + ldi r20, 7*4 + rcall memxor + + movw r26, h0 + ldi r17, 15 + ldi r30, lo8(f2_2_shift_table-8) + ldi r31, hi8(f2_2_shift_table-8) +10: movw r22, xl0 movw r24, xl2 - lsr r20 - brcc 20f + lpm r20, Z+ + sbrs r17, 3 rcall shiftleft32 - rjmp 21f -20: rcall shiftright32 -21: - rcall eor32_to_acc + rcall mov32_to_acc rcall load32_from_Y rcall eor32_to_acc - movw r30, h0 - rcall add_acc_to_Z - movw h0, r30 + rcall add_acc_to_X dec r17 - brne 10b + brpl 10b ;----- - sbiw r30, 8*4 /* Z points to h8 */ - movw r26, r30 - sbiw r26, 4*4 /* X points to h4 */ + sbiw r26, 8*4 /* X points to h8 */ + movw r28, r26 + sbiw r28, 4*4 /* Y points to h4 */ ldi r17, 8 ldi r18, 9 10: - rcall load32_from_X + rcall load32_from_Y mov r20, r18 rcall rotateleft32 - movw acc0, r22 - movw acc2, r24 - rcall add_acc_to_Z + rcall mov32_to_acc + rcall add_acc_to_X inc r18 cpi r17, 5 brne 20f - sbiw r26, 8*4 + sbiw r28, 8*4 20: dec r17 brne 10b +exit: ;--- DBG ; pop r25 ; pop r24 ; ldi r22, 'H' ; rcall printX ;--- END DBG - stack_free_large3 32*4 - pop_range 2, 17 + stack_free_large3 32*4+4 + pop_range 10, 17 +pop9: + pop_range 8, 9 +pop28: pop_range 28, 29 +pop7: + pop_range 6, 7 +pop5: + pop_range 2, 5 ret /******************************************************************************/ @@ -904,9 +885,7 @@ bmw256_lastBlock: 1: cpi len1, hi8(512) brlo 2f - movw r24, ctx0 - movw r22, blc0 - rcall bmw_small_nextBlock + rcall bmw_small_nextBlock_early ldi r24, 64 add blc0, r24 adc blc1, r1 @@ -925,15 +904,14 @@ bmw256_lastBlock: memcpy(pctx.buffer, block, (length_b+7)/8); pctx.buffer[length_b>>3] |= 0x80 >> (length_b&0x07); */ movw r24, len0 + ldi r23, 63 + movw r26, blc0 lsr r25 ror r24 lsr r24 lsr r24 - ldi r23, 63 - sub r23, r24 - movw r26, blc0 - tst r24 breq 301f + sub r23, r24 /* copy (#r24) bytes to stack buffer */ 30: ld r20, X+ st Z+, r20 @@ -969,9 +947,8 @@ bmw256_lastBlock: breq 400f cpi len0, 192 brlo 400f - movw r24, ctx0 - movw r22, buf0 - rcall bmw_small_nextBlock + movw blc0, buf0 + rcall bmw_small_nextBlock_early movw r26, buf0 ldi r20, 64-8 350: @@ -991,52 +968,45 @@ bmw256_lastBlock: rcall load32_from_Z_stub 410: clr r25 + ldi r20, 1 lsl r21 - rol r22 - rol r23 - rol r24 - rol r25 + rcall rol32 mov r20, len0 add r21, len1 adc r22, r1 adc r23, r1 adc r24, r1 adc r25, r1 - movw r30, buf0 - adiw r30, 64-8 - st Z+, r20 - st Z+, r21 - st Z+, r22 - st Z+, r23 - st Z+, r24 - st Z+, r25 - st Z+, r1 - st Z+, r1 - movw r24, ctx0 - movw r22, buf0 - rcall bmw_small_nextBlock + movw r26, buf0 + adiw r26, 64-8 + st X+, r20 + st X+, r21 + rcall store32_to_X + st X+, r1 + st X+, r1 + movw blc0, buf0 + rcall bmw_small_nextBlock_early /* memset(pctx.buffer, 0xaa, 64); for(i=0; i<16;++i){ pctx.buffer[i*4] = i+0xa0; } */ - ldi r18, 0xa0 - ldi r19, 0xaa + ldi r22, 0xa0 + ldi r23, 0xaa + ldi r24, 0xaa + ldi r25, 0xaa movw r26, buf0 500: - st X+, r18 - st X+, r19 - st X+, r19 - st X+, r19 - inc r18 - sbrs r18, 4 + rcall store32_to_X + inc r22 + sbrs r22, 4 rjmp 500b /* bmw_small_nextBlock((bmw_small_ctx_t*)&pctx, ctx->h); memcpy(ctx->h, pctx.buffer, 64); */ - movw r24, buf0 - movw r22, ctx0 - rcall bmw_small_nextBlock + movw r24, buf0 + movw r22, ctx0 + rcall bmw_small_nextBlock ldi r18, 64 movw r26, ctx0 movw r30, buf0 @@ -1047,13 +1017,11 @@ bmw256_lastBlock: brne 600b stack_free_large 68 - pop_range 28, 29 - pop_range 2, 7 - ret + rjmp pop28 /******************************************************************************* -* void bmw224_ctx2hash(void* dest, const bmw224_ctx_t* ctx){ +* void bmw224_ctx2hash(void *dest, const bmw224_ctx_t *ctx){ * memcpy(dest, &(ctx->h[9]), 224/8); * } * @@ -1062,14 +1030,13 @@ bmw256_lastBlock: */ .global bmw224_ctx2hash bmw224_ctx2hash: - movw r26, r24 movw r30, r22 adiw r30, 9*4 - ldi r22, 28 + ldi r18, 28 rjmp 1f /******************************************************************************* -* void bmw256_ctx2hash(void* dest, const bmw256_ctx_t* ctx){ +* void bmw256_ctx2hash(void *dest, const bmw256_ctx_t *ctx){ * memcpy(dest, &(ctx->h[8]), 256/8); * } * @@ -1078,19 +1045,18 @@ bmw224_ctx2hash: */ .global bmw256_ctx2hash bmw256_ctx2hash: - movw r26, r24 movw r30, r22 adiw r30, 8*4 - ldi r22, 32 -1: - ld r23, Z+ + ldi r18, 32 +1: movw r26, r24 +1: ld r23, Z+ st X+, r23 - dec r22 + dec r18 brne 1b ret /******************************************************************************* -* void bmw256(void* dest, const void* msg, uint32_t length_b){ +* void bmw256(void *dest, const void *msg, uint32_t length_b){ * bmw_small_ctx_t ctx; * bmw256_init(&ctx); * while(length_b>=BMW_SMALL_BLOCKSIZE){ @@ -1118,12 +1084,12 @@ dst0 = 10 dst1 = 11 .global bmw256 bmw256: - push r16 - ldi r16, 1 + set rjmp bmw_small_all + /******************************************************************************* -* void bmw224(void* dest, const void* msg, uint32_t length_b){ +* void bmw224(void *dest, const void *msg, uint32_t length_b){ * bmw_small_ctx_t ctx; * bmw224_init(&ctx); * while(length_b>=BMW_SMALL_BLOCKSIZE){ @@ -1151,15 +1117,20 @@ dst0 = 6 dst1 = 7 .global bmw224 bmw224: - push r16 - clr r16 + clt + bmw_small_all: - push_range 2, 9 + push_range 2, 7 push_range 28, 29 + push_range 8, 9 + push r16 stack_alloc_large 64+4 adiw r30, 1 - movw ctx0, r30 + clr r16 + brtc 10f + inc r16 +10: movw ctx0, r30 movw dst0, r24 movw msg0, r22 movw len0, r18 @@ -1174,9 +1145,7 @@ bmw_small_all: mov r18, len2 or r18, len3 breq 50f - movw r24, ctx0 - movw r22, msg0 - rcall bmw_small_nextBlock + rcall bmw_small_nextBlock_early subi len1, 2 sbc len2, r1 sbc len3, r1 @@ -1197,10 +1166,8 @@ bmw_small_all: adc r31, r1 icall stack_free_large 64+4 - pop_range 28, 29 - pop_range 2, 9 pop r16 - ret + rjmp pop9 init_lut: rjmp bmw224_init @@ -1210,7 +1177,7 @@ c2h_lut: rjmp bmw256_ctx2hash /******************************************************************************* -* void bmw224_init(bmw224_ctx_t* ctx){ +* void bmw224_init(bmw224_ctx_t *ctx){ * uint8_t i; * ctx->h[0] = 0x00010203; * for(i=1; i<16; ++i){ @@ -1223,42 +1190,30 @@ c2h_lut: */ .global bmw224_init bmw224_init: - movw r26, r24 - ldi r22, 0x03 - ldi r23, 0x02 - ldi r24, 0x01 - ldi r25, 0x00 + ldi r22, 0x00 + ldi r23, 0x40 bmw_small_init: - st X+, r22 - st X+, r23 - st X+, r24 - st X+, r25 - ldi r18, 16-1 - ldi r20, 0x04 -1: - add r22, r20 - adc r23, r20 - adc r24, r20 - adc r25, r20 - st X+, r22 - st X+, r23 - st X+, r24 - st X+, r25 - dec r18 - brne 1b - st X+, r1 - st X+, r1 - st X+, r1 - st X+, r1 + movw r26, r24 + adiw r26, 4 +10: + st -X, r22 + inc r22 + mov r20, r22 + andi r20, 0x3 + brne 10b + adiw r26, 8 +20: cp r22, r23 + brne 10b + st -X, r1 + st -X, r1 + st -X, r1 + st -X, r1 ret .global bmw256_init bmw256_init: - movw r26, r24 - ldi r22, 0x43 - ldi r23, 0x42 - ldi r24, 0x41 - ldi r25, 0x40 + ldi r22, 0x40 + ldi r23, 0x80 rjmp bmw_small_init