keccakf1600.S
@
@ Implementation by the Keccak, Keyak and Ketje Teams, namely, Guido Bertoni,
@ Joan Daemen, Michaël Peeters, Gilles Van Assche and Ronny Van Keer, hereby
@ denoted as "the implementer".
@
@ For more information, feedback or questions, please refer to our websites:
@ http://keccak.noekeon.org/
@ http://keyak.noekeon.org/
@ http://ketje.noekeon.org/
@
@ To the extent possible under law, the implementer has waived all copyright
@ and related or neighboring rights to the source code in this file.
@ http://creativecommons.org/publicdomain/zero/1.0/
@
@ WARNING: These functions work only on little endian CPU with@ ARMv7m architecture (ARM Cortex-M3, ...).
.thumb
.syntax unified
.text
@ Credit: Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
.macro toBitInterleaving x0,x1,s0,s1,t,over
and \t,\x0,#0x55555555
orr \t,\t,\t, LSR #1
and \t,\t,#0x33333333
orr \t,\t,\t, LSR #2
and \t,\t,#0x0F0F0F0F
orr \t,\t,\t, LSR #4
and \t,\t,#0x00FF00FF
bfi \t,\t,#8, #8
.if \over != 0
lsr \s0,\t, #8
.else
eor \s0,\s0,\t, LSR #8
.endif
and \t,\x1,#0x55555555
orr \t,\t,\t, LSR #1
and \t,\t,#0x33333333
orr \t,\t,\t, LSR #2
and \t,\t,#0x0F0F0F0F
orr \t,\t,\t, LSR #4
and \t,\t,#0x00FF00FF
orr \t,\t,\t, LSR #8
eor \s0,\s0,\t, LSL #16
and \t,\x0,#0xAAAAAAAA
orr \t,\t,\t, LSL #1
and \t,\t,#0xCCCCCCCC
orr \t,\t,\t, LSL #2
and \t,\t,#0xF0F0F0F0
orr \t,\t,\t, LSL #4
and \t,\t,#0xFF00FF00
orr \t,\t,\t, LSL #8
.if \over != 0
lsr \s1,\t, #16
.else
eor \s1,\s1,\t, LSR #16
.endif
and \t,\x1,#0xAAAAAAAA
orr \t,\t,\t, LSL #1
and \t,\t,#0xCCCCCCCC
orr \t,\t,\t, LSL #2
and \t,\t,#0xF0F0F0F0
orr \t,\t,\t, LSL #4
and \t,\t,#0xFF00FF00
orr \t,\t,\t, LSL #8
bfc \t, #0, #16
eors \s1,\s1,\t
.endm
@ Credit: Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
.macro fromBitInterleaving x0, x1, t
movs \t, \x0 @ t = x0@
bfi \x0, \x1, #16, #16 @ x0 = (x0 & 0x0000FFFF) | (x1 << 16)@
bfc \x1, #0, #16 @ x1 = (t >> 16) | (x1 & 0xFFFF0000)@
orr \x1, \x1, \t, LSR #16
eor \t, \x0, \x0, LSR #8 @ t = (x0 ^ (x0 >> 8)) & 0x0000FF00UL@ x0 = x0 ^ t ^ (t << 8)@
and \t, #0x0000FF00
eors \x0, \x0, \t
eor \x0, \x0, \t, LSL #8
eor \t, \x0, \x0, LSR #4 @ t = (x0 ^ (x0 >> 4)) & 0x00F000F0UL@ x0 = x0 ^ t ^ (t << 4)@
and \t, #0x00F000F0
eors \x0, \x0, \t
eor \x0, \x0, \t, LSL #4
eor \t, \x0, \x0, LSR #2 @ t = (x0 ^ (x0 >> 2)) & 0x0C0C0C0CUL@ x0 = x0 ^ t ^ (t << 2)@
and \t, #0x0C0C0C0C
eors \x0, \x0, \t
eor \x0, \x0, \t, LSL #2
eor \t, \x0, \x0, LSR #1 @ t = (x0 ^ (x0 >> 1)) & 0x22222222UL@ x0 = x0 ^ t ^ (t << 1)@
and \t, #0x22222222
eors \x0, \x0, \t
eor \x0, \x0, \t, LSL #1
eor \t, \x1, \x1, LSR #8 @ t = (x1 ^ (x1 >> 8)) & 0x0000FF00UL@ x1 = x1 ^ t ^ (t << 8)@
and \t, #0x0000FF00
eors \x1, \x1, \t
eor \x1, \x1, \t, LSL #8
eor \t, \x1, \x1, LSR #4 @ t = (x1 ^ (x1 >> 4)) & 0x00F000F0UL@ x1 = x1 ^ t ^ (t << 4)@
and \t, #0x00F000F0
eors \x1, \x1, \t
eor \x1, \x1, \t, LSL #4
eor \t, \x1, \x1, LSR #2 @ t = (x1 ^ (x1 >> 2)) & 0x0C0C0C0CUL@ x1 = x1 ^ t ^ (t << 2)@
and \t, #0x0C0C0C0C
eors \x1, \x1, \t
eor \x1, \x1, \t, LSL #2
eor \t, \x1, \x1, LSR #1 @ t = (x1 ^ (x1 >> 1)) & 0x22222222UL@ x1 = x1 ^ t ^ (t << 1)@
and \t, #0x22222222
eors \x1, \x1, \t
eor \x1, \x1, \t, LSL #1
.endm
@ --- offsets in state
.equ Aba0, 0*4
.equ Aba1, 1*4
.equ Abe0, 2*4
.equ Abe1, 3*4
.equ Abi0, 4*4
.equ Abi1, 5*4
.equ Abo0, 6*4
.equ Abo1, 7*4
.equ Abu0, 8*4
.equ Abu1, 9*4
.equ Aga0, 10*4
.equ Aga1, 11*4
.equ Age0, 12*4
.equ Age1, 13*4
.equ Agi0, 14*4
.equ Agi1, 15*4
.equ Ago0, 16*4
.equ Ago1, 17*4
.equ Agu0, 18*4
.equ Agu1, 19*4
.equ Aka0, 20*4
.equ Aka1, 21*4
.equ Ake0, 22*4
.equ Ake1, 23*4
.equ Aki0, 24*4
.equ Aki1, 25*4
.equ Ako0, 26*4
.equ Ako1, 27*4
.equ Aku0, 28*4
.equ Aku1, 29*4
.equ Ama0, 30*4
.equ Ama1, 31*4
.equ Ame0, 32*4
.equ Ame1, 33*4
.equ Ami0, 34*4
.equ Ami1, 35*4
.equ Amo0, 36*4
.equ Amo1, 37*4
.equ Amu0, 38*4
.equ Amu1, 39*4
.equ Asa0, 40*4
.equ Asa1, 41*4
.equ Ase0, 42*4
.equ Ase1, 43*4
.equ Asi0, 44*4
.equ Asi1, 45*4
.equ Aso0, 46*4
.equ Aso1, 47*4
.equ Asu0, 48*4
.equ Asu1, 49*4
@ --- offsets on stack
.equ mDa0, 0*4
.equ mDa1, 1*4
.equ mDo0, 2*4
.equ mDo1, 3*4
.equ mDi0, 4*4
.equ mRC , 5*4
.equ mSize, 6*4
.macro xor5 result,b,g,k,m,s
ldr \result, [r0, #\b]
ldr r1, [r0, #\g]
eors \result, \result, r1
ldr r1, [r0, #\k]
eors \result, \result, r1
ldr r1, [r0, #\m]
eors \result, \result, r1
ldr r1, [r0, #\s]
eors \result, \result, r1
.endm
.macro xorrol result, aa, bb
eor \result, \aa, \bb, ROR #31
.endm
.macro xandnot resofs, aa, bb, cc
bic r1, \cc, \bb
eors r1, r1, \aa
str r1, [r0, #\resofs]
.endm
.macro KeccakThetaRhoPiChiIota aA1, aDax, aA2, aDex, rot2, aA3, aDix, rot3, aA4, aDox, rot4, aA5, aDux, rot5, offset, last
ldr r3, [r0, #\aA1]
ldr r4, [r0, #\aA2]
ldr r5, [r0, #\aA3]
ldr r6, [r0, #\aA4]
ldr r7, [r0, #\aA5]
eors r3, r3, \aDax
eors r5, r5, \aDix
eors r4, r4, \aDex
eors r6, r6, \aDox
eors r7, r7, \aDux
rors r4, #32-\rot2
rors r5, #32-\rot3
rors r6, #32-\rot4
rors r7, #32-\rot5
xandnot \aA2, r4, r5, r6
xandnot \aA3, r5, r6, r7
xandnot \aA4, r6, r7, r3
xandnot \aA5, r7, r3, r4
ldr r1, [sp, #mRC]
bics r5, r5, r4
ldr r4, [r1, #\offset]
eors r3, r3, r5
eors r3, r3, r4
.if \last == 1
ldr r4, [r1, #32]!
str r1, [sp, #mRC]
cmp r4, #0xFF
.endif
str r3, [r0, #\aA1]
.endm
.macro KeccakThetaRhoPiChi aB1, aA1, aDax, rot1, aB2, aA2, aDex, rot2, aB3, aA3, aDix, rot3, aB4, aA4, aDox, rot4, aB5, aA5, aDux, rot5
ldr \aB1, [r0, #\aA1]
ldr \aB2, [r0, #\aA2]
ldr \aB3, [r0, #\aA3]
ldr \aB4, [r0, #\aA4]
ldr \aB5, [r0, #\aA5]
eors \aB1, \aB1, \aDax
eors \aB3, \aB3, \aDix
eors \aB2, \aB2, \aDex
eors \aB4, \aB4, \aDox
eors \aB5, \aB5, \aDux
rors \aB1, #32-\rot1
.if \rot2 > 0
rors \aB2, #32-\rot2
.endif
rors \aB3, #32-\rot3
rors \aB4, #32-\rot4
rors \aB5, #32-\rot5
xandnot \aA1, r3, r4, r5
xandnot \aA2, r4, r5, r6
xandnot \aA3, r5, r6, r7
xandnot \aA4, r6, r7, r3
xandnot \aA5, r7, r3, r4
.endm
.macro KeccakRound0
xor5 r3, Abu0, Agu0, Aku0, Amu0, Asu0
xor5 r7, Abe1, Age1, Ake1, Ame1, Ase1
xorrol r6, r3, r7
str r6, [sp, #mDa0]
xor5 r6, Abu1, Agu1, Aku1, Amu1, Asu1
xor5 lr, Abe0, Age0, Ake0, Ame0, Ase0
eors r8, r6, lr
str r8, [sp, #mDa1]
xor5 r5, Abi0, Agi0, Aki0, Ami0, Asi0
xorrol r9, r5, r6
str r9, [sp, #mDo0]
xor5 r4, Abi1, Agi1, Aki1, Ami1, Asi1
eors r3, r3, r4
str r3, [sp, #mDo1]
xor5 r3, Aba0, Aga0, Aka0, Ama0, Asa0
xorrol r10, r3, r4
xor5 r6, Aba1, Aga1, Aka1, Ama1, Asa1
eors r11, r6, r5
xor5 r4, Abo1, Ago1, Ako1, Amo1, Aso1
xorrol r5, lr, r4
str r5, [sp, #mDi0]
xor5 r5, Abo0, Ago0, Ako0, Amo0, Aso0
eors r2, r7, r5
xorrol r12, r5, r6
eors lr, r4, r3
KeccakThetaRhoPiChi r5, Aka1, r8, 2, r6, Ame1, r11, 23, r7, Asi1, r2, 31, r3, Abo0, r9, 14, r4, Agu0, r12, 10
KeccakThetaRhoPiChi r7, Asa1, r8, 9, r3, Abe0, r10, 0, r4, Agi1, r2, 3, r5, Ako0, r9, 12, r6, Amu1, lr, 4
ldr r8, [sp, #mDa0]
KeccakThetaRhoPiChi r4, Aga0, r8, 18, r5, Ake0, r10, 5, r6, Ami1, r2, 8, r7, Aso0, r9, 28, r3, Abu1, lr, 14
KeccakThetaRhoPiChi r6, Ama0, r8, 20, r7, Ase1, r11, 1, r3, Abi1, r2, 31, r4, Ago0, r9, 27, r5, Aku0, r12, 19
ldr r9, [sp, #mDo1]
KeccakThetaRhoPiChiIota Aba0, r8, Age0, r10, 22, Aki1, r2, 22, Amo1, r9, 11, Asu0, r12, 7, 0, 0
ldr r2, [sp, #mDi0]
KeccakThetaRhoPiChi r5, Aka0, r8, 1, r6, Ame0, r10, 22, r7, Asi0, r2, 30, r3, Abo1, r9, 14, r4, Agu1, lr, 10
KeccakThetaRhoPiChi r7, Asa0, r8, 9, r3, Abe1, r11, 1, r4, Agi0, r2, 3, r5, Ako1, r9, 13, r6, Amu0, r12, 4
ldr r8, [sp, #mDa1]
KeccakThetaRhoPiChi r4, Aga1, r8, 18, r5, Ake1, r11, 5, r6, Ami0, r2, 7, r7, Aso1, r9, 28, r3, Abu0, r12, 13
KeccakThetaRhoPiChi r6, Ama1, r8, 21, r7, Ase0, r10, 1, r3, Abi0, r2, 31, r4, Ago1, r9, 28, r5, Aku1, lr, 20
ldr r9, [sp, #mDo0]
KeccakThetaRhoPiChiIota Aba1, r8, Age1, r11, 22, Aki0, r2, 21, Amo0, r9, 10, Asu1, lr, 7, 4, 0
.endm
.macro KeccakRound1
xor5 r3, Asu0, Agu0, Amu0, Abu1, Aku1
xor5 r7, Age1, Ame0, Abe0, Ake1, Ase1
xorrol r6, r3, r7
str r6, [sp, #mDa0]
xor5 r6, Asu1, Agu1, Amu1, Abu0, Aku0
xor5 lr, Age0, Ame1, Abe1, Ake0, Ase0
eors r8, r6, lr
str r8, [sp, #mDa1]
xor5 r5, Aki1, Asi1, Agi0, Ami1, Abi0
xorrol r9, r5, r6
str r9, [sp, #mDo0]
xor5 r4, Aki0, Asi0, Agi1, Ami0, Abi1
eors r3, r3, r4
str r3, [sp, #mDo1]
xor5 r3, Aba0, Aka1, Asa0, Aga0, Ama1
xorrol r10, r3, r4
xor5 r6, Aba1, Aka0, Asa1, Aga1, Ama0
eors r11, r6, r5
xor5 r4, Amo0, Abo1, Ako0, Aso1, Ago0
xorrol r5, lr, r4
str r5, [sp, #mDi0]
xor5 r5, Amo1, Abo0, Ako1, Aso0, Ago1
eors r2, r7, r5
xorrol r12, r5, r6
eors lr, r4, r3
KeccakThetaRhoPiChi r5, Asa1, r8, 2, r6, Ake1, r11, 23, r7, Abi1, r2, 31, r3, Amo1, r9, 14, r4, Agu0, r12, 10
KeccakThetaRhoPiChi r7, Ama0, r8, 9, r3, Age0, r10, 0, r4, Asi0, r2, 3, r5, Ako1, r9, 12, r6, Abu0, lr, 4
ldr r8, [sp, #mDa0]
KeccakThetaRhoPiChi r4, Aka1, r8, 18, r5, Abe1, r10, 5, r6, Ami0, r2, 8, r7, Ago1, r9, 28, r3, Asu1, lr, 14
KeccakThetaRhoPiChi r6, Aga0, r8, 20, r7, Ase1, r11, 1, r3, Aki0, r2, 31, r4, Abo0, r9, 27, r5, Amu0, r12, 19
ldr r9, [sp, #mDo1]
KeccakThetaRhoPiChiIota Aba0, r8, Ame1, r10, 22, Agi1, r2, 22, Aso1, r9, 11, Aku1, r12, 7, 8, 0
ldr r2, [sp, #mDi0]
KeccakThetaRhoPiChi r5, Asa0, r8, 1, r6, Ake0, r10, 22, r7, Abi0, r2, 30, r3, Amo0, r9, 14, r4, Agu1, lr, 10
KeccakThetaRhoPiChi r7, Ama1, r8, 9, r3, Age1, r11, 1, r4, Asi1, r2, 3, r5, Ako0, r9, 13, r6, Abu1, r12, 4
ldr r8, [sp, #mDa1]
KeccakThetaRhoPiChi r4, Aka0, r8, 18, r5, Abe0, r11, 5, r6, Ami1, r2, 7, r7, Ago0, r9, 28, r3, Asu0, r12, 13
KeccakThetaRhoPiChi r6, Aga1, r8, 21, r7, Ase0, r10, 1, r3, Aki1, r2, 31, r4, Abo1, r9, 28, r5, Amu1, lr, 20
ldr r9, [sp, #mDo0]
KeccakThetaRhoPiChiIota Aba1, r8, Ame0, r11, 22, Agi0, r2, 21, Aso0, r9, 10, Aku0, lr, 7, 12, 0
.endm
.macro KeccakRound2
xor5 r3, Aku1, Agu0, Abu1, Asu1, Amu1
xor5 r7, Ame0, Ake0, Age0, Abe0, Ase1
xorrol r6, r3, r7
str r6, [sp, #mDa0]
xor5 r6, Aku0, Agu1, Abu0, Asu0, Amu0
xor5 lr, Ame1, Ake1, Age1, Abe1, Ase0
eors r8, r6, lr
str r8, [sp, #mDa1]
xor5 r5, Agi1, Abi1, Asi1, Ami0, Aki1
xorrol r9, r5, r6
str r9, [sp, #mDo0]
xor5 r4, Agi0, Abi0, Asi0, Ami1, Aki0
eors r3, r3, r4
str r3, [sp, #mDo1]
xor5 r3, Aba0, Asa1, Ama1, Aka1, Aga1
xorrol r10, r3, r4
xor5 r6, Aba1, Asa0, Ama0, Aka0, Aga0
eors r11, r6, r5
xor5 r4, Aso0, Amo0, Ako1, Ago0, Abo0
xorrol r5, lr, r4
str r5, [sp, #mDi0]
xor5 r5, Aso1, Amo1, Ako0, Ago1, Abo1
eors r2, r7, r5
xorrol r12, r5, r6
eors lr, r4, r3
KeccakThetaRhoPiChi r5, Ama0, r8, 2, r6, Abe0, r11, 23, r7, Aki0, r2, 31, r3, Aso1, r9, 14, r4, Agu0, r12, 10
KeccakThetaRhoPiChi r7, Aga0, r8, 9, r3, Ame1, r10, 0, r4, Abi0, r2, 3, r5, Ako0, r9, 12, r6, Asu0, lr, 4
ldr r8, [sp, #mDa0]
KeccakThetaRhoPiChi r4, Asa1, r8, 18, r5, Age1, r10, 5, r6, Ami1, r2, 8, r7, Abo1, r9, 28, r3, Aku0, lr, 14
KeccakThetaRhoPiChi r6, Aka1, r8, 20, r7, Ase1, r11, 1, r3, Agi0, r2, 31, r4, Amo1, r9, 27, r5, Abu1, r12, 19
ldr r9, [sp, #mDo1]
KeccakThetaRhoPiChiIota Aba0, r8, Ake1, r10, 22, Asi0, r2, 22, Ago0, r9, 11, Amu1, r12, 7, 16, 0
ldr r2, [sp, #mDi0]
KeccakThetaRhoPiChi r5, Ama1, r8, 1, r6, Abe1, r10, 22, r7, Aki1, r2, 30, r3, Aso0, r9, 14, r4, Agu1, lr, 10
KeccakThetaRhoPiChi r7, Aga1, r8, 9, r3, Ame0, r11, 1, r4, Abi1, r2, 3, r5, Ako1, r9, 13, r6, Asu1, r12, 4
ldr r8, [sp, #mDa1]
KeccakThetaRhoPiChi r4, Asa0, r8, 18, r5, Age0, r11, 5, r6, Ami0, r2, 7, r7, Abo0, r9, 28, r3, Aku1, r12, 13
KeccakThetaRhoPiChi r6, Aka0, r8, 21, r7, Ase0, r10, 1, r3, Agi1, r2, 31, r4, Amo0, r9, 28, r5, Abu0, lr, 20
ldr r9, [sp, #mDo0]
KeccakThetaRhoPiChiIota Aba1, r8, Ake0, r11, 22, Asi1, r2, 21, Ago1, r9, 10, Amu0, lr, 7, 20, 0
.endm
.macro KeccakRound3
xor5 r3, Amu1, Agu0, Asu1, Aku0, Abu0
xor5 r7, Ake0, Abe1, Ame1, Age0, Ase1
xorrol r6, r3, r7
str r6, [sp, #mDa0]
xor5 r6, Amu0, Agu1, Asu0, Aku1, Abu1
xor5 lr, Ake1, Abe0, Ame0, Age1, Ase0
eors r8, r6, lr
str r8, [sp, #mDa1]
xor5 r5, Asi0, Aki0, Abi1, Ami1, Agi1
xorrol r9, r5, r6
str r9, [sp, #mDo0]
xor5 r4, Asi1, Aki1, Abi0, Ami0, Agi0
eors r3, r3, r4
str r3, [sp, #mDo1]
xor5 r3, Aba0, Ama0, Aga1, Asa1, Aka0
xorrol r10, r3, r4
xor5 r6, Aba1, Ama1, Aga0, Asa0, Aka1
eors r11, r6, r5
xor5 r4, Ago1, Aso0, Ako0, Abo0, Amo1
xorrol r5, lr, r4
str r5, [sp, #mDi0]
xor5 r5, Ago0, Aso1, Ako1, Abo1, Amo0
eors r2, r7, r5
xorrol r12, r5, r6
eors lr, r4, r3
KeccakThetaRhoPiChi r5, Aga0, r8, 2, r6, Age0, r11, 23, r7, Agi0, r2, 31, r3, Ago0, r9, 14, r4, Agu0, r12, 10
KeccakThetaRhoPiChi r7, Aka1, r8, 9, r3, Ake1, r10, 0, r4, Aki1, r2, 3, r5, Ako1, r9, 12, r6, Aku1, lr, 4
ldr r8, [sp, #mDa0]
KeccakThetaRhoPiChi r4, Ama0, r8, 18, r5, Ame0, r10, 5, r6, Ami0, r2, 8, r7, Amo0, r9, 28, r3, Amu0, lr, 14
KeccakThetaRhoPiChi r6, Asa1, r8, 20, r7, Ase1, r11, 1, r3, Asi1, r2, 31, r4, Aso1, r9, 27, r5, Asu1, r12, 19
ldr r9, [sp, #mDo1]
KeccakThetaRhoPiChiIota Aba0, r8, Abe0, r10, 22, Abi0, r2, 22, Abo0, r9, 11, Abu0, r12, 7, 24, 0
ldr r2, [sp, #mDi0]
KeccakThetaRhoPiChi r5, Aga1, r8, 1, r6, Age1, r10, 22, r7, Agi1, r2, 30, r3, Ago1, r9, 14, r4, Agu1, lr, 10
KeccakThetaRhoPiChi r7, Aka0, r8, 9, r3, Ake0, r11, 1, r4, Aki0, r2, 3, r5, Ako0, r9, 13, r6, Aku0, r12, 4
ldr r8, [sp, #mDa1]
KeccakThetaRhoPiChi r4, Ama1, r8, 18, r5, Ame1, r11, 5, r6, Ami1, r2, 7, r7, Amo1, r9, 28, r3, Amu1, r12, 13
KeccakThetaRhoPiChi r6, Asa0, r8, 21, r7, Ase0, r10, 1, r3, Asi0, r2, 31, r4, Aso0, r9, 28, r5, Asu0, lr, 20
ldr r9, [sp, #mDo0]
KeccakThetaRhoPiChiIota Aba1, r8, Abe1, r11, 22, Abi1, r2, 21, Abo1, r9, 10, Abu1, lr, 7, 28, 1
.endm
@----------------------------------------------------------------------------
@
@ void KeccakF1600_Initialize( void )
@
.align 8
.global KeccakF1600_Initialize
KeccakF1600_Initialize:
bx lr
@----------------------------------------------------------------------------
@
@ void KeccakF1600_StateXORBytes(void *state, const unsigned char *data, unsigned int offset, unsigned int length)
@
.align 8
.global KeccakF1600_StateXORBytes
KeccakF1600_StateXORBytes:
cbz r3, KeccakF1600_StateXORBytes_Exit1
push {r4 - r8, lr} @ then
bic r4, r2, #7 @ offset &= ~7
adds r0, r0, r4 @ add whole lane offset to state pointer
ands r2, r2, #7 @ offset &= 7 (part not lane aligned)
beq KeccakF1600_StateXORBytes_CheckLanes @ .if offset != 0
movs r4, r3 @ then, do remaining bytes in first lane
rsb r5, r2, #8 @ max size in lane = 8 - offset
cmp r4, r5
ble KeccakF1600_StateXORBytes_BytesAlign
movs r4, r5
KeccakF1600_StateXORBytes_BytesAlign:
sub r8, r3, r4 @ size left
movs r3, r4
bl __KeccakF1600_StateXORBytesInLane
mov r3, r8
KeccakF1600_StateXORBytes_CheckLanes:
lsrs r2, r3, #3 @ .if length >= 8
beq KeccakF1600_StateXORBytes_Bytes
mov r8, r3
bl __KeccakF1600_StateXORLanes
and r3, r8, #7
KeccakF1600_StateXORBytes_Bytes:
cbz r3, KeccakF1600_StateXORBytes_Exit
movs r2, #0
bl __KeccakF1600_StateXORBytesInLane
KeccakF1600_StateXORBytes_Exit:
pop {r4 - r8, pc}
KeccakF1600_StateXORBytes_Exit1:
bx lr
@----------------------------------------------------------------------------
@
@ __KeccakF1600_StateXORLanes
@
@ Input:
@ r0 state pointer
@ r1 data pointer
@ r2 laneCount
@
@ Output:
@ r0 state pointer next lane
@ r1 data pointer next byte to input
@
@ Changed: r2-r7
@
.align 8
__KeccakF1600_StateXORLanes:
__KeccakF1600_StateXORLanes_LoopAligned:
ldr r4, [r1], #4
ldr r5, [r1], #4
ldrd r6, r7, [r0]
toBitInterleaving r4, r5, r6, r7, r3, 0
strd r6, r7, [r0], #8
subs r2, r2, #1
bne __KeccakF1600_StateXORLanes_LoopAligned
bx lr
@----------------------------------------------------------------------------
@
@ __KeccakF1600_StateXORBytesInLane
@
@ Input:
@ r0 state pointer
@ r1 data pointer
@ r2 offset in lane
@ r3 length
@
@ Output:
@ r0 state pointer next lane
@ r1 data pointer next byte to input
@
@ Changed: r2-r7
@
.align 8
__KeccakF1600_StateXORBytesInLane:
movs r4, #0
movs r5, #0
push { r4 - r5 }
add r2, r2, sp
__KeccakF1600_StateXORBytesInLane_Loop:
ldrb r5, [r1], #1
strb r5, [r2], #1
subs r3, r3, #1
bne __KeccakF1600_StateXORBytesInLane_Loop
pop { r4 - r5 }
ldrd r6, r7, [r0]
toBitInterleaving r4, r5, r6, r7, r3, 0
strd r6, r7, [r0], #8
bx lr
@----------------------------------------------------------------------------
@
@ void KeccakF1600_StateExtractBytes(void *state, const unsigned char *data, unsigned int offset, unsigned int length)
@
.align 8
.global KeccakF1600_StateExtractBytes
KeccakF1600_StateExtractBytes:
cbz r3, KeccakF1600_StateExtractBytes_Exit1 @ .if length != 0
push {r4 - r8, lr} @ then
bic r4, r2, #7 @ offset &= ~7
adds r0, r0, r4 @ add whole lane offset to state pointer
ands r2, r2, #7 @ offset &= 7 (part not lane aligned)
beq KeccakF1600_StateExtractBytes_CheckLanes @ .if offset != 0
movs r4, r3 @ then, do remaining bytes in first lane
rsb r5, r2, #8 @ max size in lane = 8 - offset
cmp r4, r5
ble KeccakF1600_StateExtractBytes_BytesAlign
movs r4, r5
KeccakF1600_StateExtractBytes_BytesAlign:
sub r8, r3, r4 @ size left
movs r3, r4
bl __KeccakF1600_StateExtractBytesInLane
mov r3, r8
KeccakF1600_StateExtractBytes_CheckLanes:
lsrs r2, r3, #3 @ .if length >= 8
beq KeccakF1600_StateExtractBytes_Bytes
mov r8, r3
bl __KeccakF1600_StateExtractLanes
and r3, r8, #7
KeccakF1600_StateExtractBytes_Bytes:
cbz r3, KeccakF1600_StateExtractBytes_Exit
movs r2, #0
bl __KeccakF1600_StateExtractBytesInLane
KeccakF1600_StateExtractBytes_Exit:
pop {r4 - r8, pc}
KeccakF1600_StateExtractBytes_Exit1:
bx lr
@----------------------------------------------------------------------------
@
@ __KeccakF1600_StateExtractLanes
@
@ Input:
@ r0 state pointer
@ r1 data pointer
@ r2 laneCount
@
@ Output:
@ r0 state pointer next lane
@ r1 data pointer next byte to input
@
@ Changed: r2-r5
@
.align 8
__KeccakF1600_StateExtractLanes:
__KeccakF1600_StateExtractLanes_LoopAligned:
ldrd r4, r5, [r0], #8
fromBitInterleaving r4, r5, r3
str r4, [r1], #4
subs r2, r2, #1
str r5, [r1], #4
bne __KeccakF1600_StateExtractLanes_LoopAligned
bx lr
@----------------------------------------------------------------------------
@
@ __KeccakF1600_StateExtractBytesInLane
@
@ Input:
@ r0 state pointer
@ r1 data pointer
@ r2 offset in lane
@ r3 length
@
@ Output:
@ r0 state pointer next lane
@ r1 data pointer next byte to input
@
@ Changed: r2-r6
@
.align 8
__KeccakF1600_StateExtractBytesInLane:
ldrd r4, r5, [r0], #8
fromBitInterleaving r4, r5, r6
push {r4, r5}
add r2, sp, r2
__KeccakF1600_StateExtractBytesInLane_Loop:
ldrb r4, [r2], #1
subs r3, r3, #1
strb r4, [r1], #1
bne __KeccakF1600_StateExtractBytesInLane_Loop
add sp, #8
bx lr
.align 8
KeccakF1600_StatePermute_RoundConstantsWithTerminator:
@ 0 1
.long 0x00000001, 0x00000000
.long 0x00000000, 0x00000089
.long 0x00000000, 0x8000008b
.long 0x00000000, 0x80008080
.long 0x00000001, 0x0000008b
.long 0x00000001, 0x00008000
.long 0x00000001, 0x80008088
.long 0x00000001, 0x80000082
.long 0x00000000, 0x0000000b
.long 0x00000000, 0x0000000a
.long 0x00000001, 0x00008082
.long 0x00000000, 0x00008003
.long 0x00000001, 0x0000808b
.long 0x00000001, 0x8000000b
.long 0x00000001, 0x8000008a
.long 0x00000001, 0x80000081
.long 0x00000000, 0x80000081
.long 0x00000000, 0x80000008
.long 0x00000000, 0x00000083
.long 0x00000000, 0x80008003
.long 0x00000001, 0x80008088
.long 0x00000000, 0x80000088
.long 0x00000001, 0x00008000
.long 0x00000000, 0x80008082
.long 0x000000FF @terminator
@----------------------------------------------------------------------------
@
@ void KeccakF1600_StatePermute( void *state )
@
.align 8
.global KeccakF1600_StatePermute
KeccakF1600_StatePermute:
adr r1, KeccakF1600_StatePermute_RoundConstantsWithTerminator
push { r4 - r12, lr }
sub sp, #mSize
str r1, [sp, #mRC]
KeccakF1600_StatePermute_RoundLoop:
KeccakRound0
KeccakRound1
KeccakRound2
KeccakRound3
bne KeccakF1600_StatePermute_RoundLoop
add sp, #mSize
pop { r4 - r12, pc }
