Xoodyak-uf-armv6-le-gcc.s

@
@ The eXtended Keccak Code Package (XKCP)
@ https://github.com/XKCP/XKCP
@
@ The Xoodoo permutation, designed by Joan Daemen, Seth Hoffert, Gilles Van Assche and Ronny Van Keer.
@
@ Implementation by Ronny Van Keer, hereby denoted as "the implementer".
@
@ For more information, feedback or questions, please refer to the Keccak Team website:
@ https://keccak.team/
@
@ 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@ ARMv6 architecture (e.g.,@ ARM11).


.text


@ ----------------------------------------------------------------------------

.equ _r0    , 5
.equ _r1    , 14
.equ _t3    , 1

.equ _w1    , 11

.equ _e0    , 2
.equ _e1    , 8

.equ _rc12  , 0x00000058
.equ _rc11  , 0x00000038
.equ _rc10  , 0x000003C0
.equ _rc9   , 0x000000D0
.equ _rc8   , 0x00000120
.equ _rc7   , 0x00000014
.equ _rc6   , 0x00000060
.equ _rc5   , 0x0000002C
.equ _rc4   , 0x00000380
.equ _rc3   , 0x000000F0
.equ _rc2   , 0x000001A0
.equ _rc1   , 0x00000012

.equ _rc6x1 , 0x00000003
.equ _rc5x2 , 0x0b000000
.equ _rc4x3 , 0x07000000
.equ _rc3x4 , 0x000f0000
.equ _rc2x5 , 0x0000d000
.equ _rc1x6 , 0x00000048

.equ _rc12x1, 0xc0000002
.equ _rc11x2, 0x0e000000
.equ _rc10x3, 0x07800000
.equ _rc9x4 , 0x000d0000
.equ _rc8x5 , 0x00009000
.equ _rc7x6 , 0x00000050
.equ _rc6x7 , 0x0000000c
.equ _rc5x8 , 0x2c000000
.equ _rc4x9 , 0x1c000000
.equ _rc3x10, 0x003c0000
.equ _rc2x11, 0x00034000
.equ _rc1x12, 0x00000120

@ ----------------------------------------------------------------------------

.macro    mXor3   ro, a0, a1, a2, rho_e1, rho_e2
    .if ((\rho_e1)%32) == 0
    eors    \ro, \a0, \a1
    .else
    eor     \ro, \a0, \a1, ROR #(32-(\rho_e1))%32
    .endif
    .if ((\rho_e2)%32) == 0
    eors    \ro, \ro, \a2
    .else
    eor     \ro, \ro, \a2, ROR #(32-(\rho_e2))%32
    .endif
    .endm

.macro    mRliXor ro, ri, rot
    .if ((\rot)%32) == 0
    eors    \ro, \ro, \ri
    .else
    eor     \ro, \ro, \ri, ROR #(32-(\rot))%32
    .endif
    .endm

.macro    mRloXor ro, ri, rot
    .if ((\rot)%32) == 0
    eors    \ro, \ro, \ri
    .else
    eor     \ro, \ri, \ro, ROR #(32-(\rot))%32
    .endif
    .endm

.macro    mChi3   a0,a1,a2,r0,r1
    bic     \r0, \a2, \a1, ROR #_w1
    eors    \a0, \a0, \r0, ROR #32-_w1
    bic     \r1, \a0, \a2, ROR #32-_w1
    eors    \a1, \a1, \r1
    bic     \r1, \a1, \a0
    eors    \a2, \a2, \r1, ROR #_w1
    .endm

.macro    mRound  r6i, r7i, r8i, r9i, r6w, r7w, r8w, r9w, r10i, r11i, r12i, lri, rho_e1, rho_we2, rc

    @ Theta: Column Parity Mixer (with late Rho-west, Rho-east bit rotations)
    mXor3   r0, r5, \r9i, \lri, \rho_e1, \rho_we2
    mXor3   r1, r2, \r6i, \r10i, \rho_e1, \rho_we2
    mRliXor r0, r0, _r1-_r0
    mRloXor r2, r0, 32-_r0
    mRloXor \r6i, r0, \rho_e1-_r0
    mRloXor \r10i, r0, \rho_we2-_r0

    mXor3   r0, r3, \r7i, \r11i, \rho_e1, \rho_we2
    mRliXor r1, r1, _r1-_r0
    mRloXor r3, r1, 32-_r0
    mRloXor \r7i, r1, \rho_e1-_r0
    mRloXor \r11i, r1, \rho_we2-_r0

    mXor3   r1, r4, \r8i, \r12i, \rho_e1, \rho_we2
    mRliXor r0, r0, _r1-_r0
    mRloXor r4, r0, 32-_r0
    mRloXor \r8i, r0, \rho_e1-_r0
    mRloXor \r12i, r0, \rho_we2-_r0

    mRliXor r1, r1, _r1-_r0
    mRloXor r5, r1, 32-_r0
    mRloXor \r9i, r1, \rho_e1-_r0
    mRloXor \lri, r1, \rho_we2-_r0
    @ After Theta the whole state is rotated -r0
    @ from here we must use a1.w instead of a1.i

    @ Iota: round constant
    .if      \rc == 0xc0000002
    eor     r2, r2, #0x00000002
    eor     r2, r2, #0xc0000000
    .else
    eor     r2, r2, #\rc
    .endif

    @ Chi: non linear step, on colums
    mChi3   r2, \r6w, \r10i, r0, r1
    mChi3   r3, \r7w, \r11i, r0, r1
    mChi3   r4, \r8w, \r12i, r0, r1
    mChi3   r5, \r9w, \lri, r0, r1
    .endm

.equ offsetInstance       , 0
.equ offsetInitialLen   , 16
.equ offsetReturn       , 20

@ ----------------------------------------------------------------------------
@
@  Xoodoo_Permute_12roundsAsm: only callable from asm
@
    .align  4
.type	Xoodoo_Permute_12roundsAsm, %function;
Xoodoo_Permute_12roundsAsm:
    mRound  r6, r7, r8, r9,    r9, r6, r7, r8,    r10, r11, r12, lr,   32,      32, _rc12x1
    mRound  r9, r6, r7, r8,    r8, r9, r6, r7,    r12, lr, r10, r11,    1, _e1+_w1, _rc11x2
    mRound  r8, r9, r6, r7,    r7, r8, r9, r6,    r10, r11, r12, lr,    1, _e1+_w1, _rc10x3
    mRound  r7, r8, r9, r6,    r6, r7, r8, r9,    r12, lr, r10, r11,    1, _e1+_w1, _rc9x4
    mRound  r6, r7, r8, r9,    r9, r6, r7, r8,    r10, r11, r12, lr,    1, _e1+_w1, _rc8x5
    mRound  r9, r6, r7, r8,    r8, r9, r6, r7,    r12, lr, r10, r11,    1, _e1+_w1, _rc7x6
    mRound  r8, r9, r6, r7,    r7, r8, r9, r6,    r10, r11, r12, lr,    1, _e1+_w1, _rc6x7
    mRound  r7, r8, r9, r6,    r6, r7, r8, r9,    r12, lr, r10, r11,    1, _e1+_w1, _rc5x8
    mRound  r6, r7, r8, r9,    r9, r6, r7, r8,    r10, r11, r12, lr,    1, _e1+_w1, _rc4x9
    mRound  r9, r6, r7, r8,    r8, r9, r6, r7,    r12, lr, r10, r11,    1, _e1+_w1, _rc3x10
    mRound  r8, r9, r6, r7,    r7, r8, r9, r6,    r10, r11, r12, lr,    1, _e1+_w1, _rc2x11
    mRound  r7, r8, r9, r6,    r6, r7, r8, r9,    r12, lr, r10, r11,    1, _e1+_w1, _rc1x12
    ror     r2, r2, #32-(12*_r0)%32
    ror     r3, r3, #32-(12*_r0)%32
    ror     r4, r4, #32-(12*_r0)%32
    ror     r5, r5, #32-(12*_r0)%32
    ror     r6, r6, #32-(12*_r0+1)%32
    ror     r7, r7, #32-(12*_r0+1)%32
    ror     r8, r8, #32-(12*_r0+1)%32
    ror     r9, r9, #32-(12*_r0+1)%32
    ror     r10, r10, #32-(12*_r0+_e1+_w1)%32
    ror     r11, r11, #32-(12*_r0+_e1+_w1)%32
    ror     r12, r12, #32-(12*_r0+_e1+_w1)%32
    ror     lr, lr, #32-(12*_r0+_e1+_w1)%32
    ldr     pc, [sp, #offsetReturn]



@ ----------------------------------------------------------------------------
@
@ size_t Xoodyak_AbsorbKeyedFullBlocks(void *state, const uint8_t *X, size_t XLen)
@ {
@     size_t  initialLength = XLen@
@
@     do {
@         SnP_Permute(state )@                      /* Xoodyak_Up(instance, NULL, 0, 0)@ */
@         SnP_AddBytes(state, X, 0, Xoodyak_Rkin)@  /* Xoodyak_Down(instance, X, Xoodyak_Rkin, 0)@ */
@         SnP_AddByte(state, 0x01, Xoodyak_Rkin)@
@         X       += Xoodyak_Rkin@
@         XLen    -= Xoodyak_Rkin@
@     } while (XLen >= Xoodyak_Rkin)@
@
@     return initialLength - XLen@
@ }
@
.equ offsetAbsorbX          , 4
.equ offsetAbsorbXLen       , 8

    .align  4
.global Xoodyak_AbsorbKeyedFullBlocks
.type	Xoodyak_AbsorbKeyedFullBlocks, %function;
Xoodyak_AbsorbKeyedFullBlocks:
    push    {r4-r12,lr}
    mov     r4, r2                    @ r4 initialLength
    subs    r2, r2, #44
    ldr     r5, =Xoodyak_AbsorbKeyedFullBlocks_Ret
    push    {r0-r5}
    ldmia   r0, {r2-r12,lr}
Xoodyak_AbsorbKeyedFullBlocks_Loop:
    b       Xoodoo_Permute_12roundsAsm
Xoodyak_AbsorbKeyedFullBlocks_Ret:
    ldr     r0, [sp, #offsetAbsorbX]
    ldr     r1, [r0], #4
    eors    r2, r2, r1
    ldr     r1, [r0], #4
    eors    r3, r3, r1
    ldr     r1, [r0], #4
    eors    r4, r4, r1
    ldr     r1, [r0], #4
    eors    r5, r5, r1
    ldr     r1, [r0], #4
    eors    r6, r6, r1
    ldr     r1, [r0], #4
    eors    r7, r7, r1
    ldr     r1, [r0], #4
    eors    r8, r8, r1
    ldr     r1, [r0], #4
    eors    r9, r9, r1
    ldr     r1, [r0], #4
    eors    r10, r10, r1
    ldr     r1, [r0], #4
    eors    r11, r11, r1
    ldr     r1, [r0], #4
    eors    lr, lr, #1
    eors    r12, r12, r1
    ldr     r1, [sp, #offsetAbsorbXLen]
    str     r0, [sp, #offsetAbsorbX]
    subs    r1, r1, #44
    str     r1, [sp, #offsetAbsorbXLen]
    bcs     Xoodyak_AbsorbKeyedFullBlocks_Loop
    ldr     r0, [sp, #offsetInstance]
    stmia   r0, {r2-r12,lr}
    pop     {r0-r5}
    adds    r2, r2, #44
    sub     r0, r4, r2
    pop     {r4-r12,pc}


@ ----------------------------------------------------------------------------
@
@ size_t Xoodyak_AbsorbHashFullBlocks(void *state, const uint8_t *X, size_t XLen)
@ {
@     size_t  initialLength = XLen@
@
@     do {
@         SnP_Permute(state )@                      /* Xoodyak_Up(instance, NULL, 0, 0)@ */
@         SnP_AddBytes(state, X, 0, Xoodyak_Rhash)@ /* Xoodyak_Down(instance, X, Xoodyak_Rhash, 0)@ */
@         SnP_AddByte(state, 0x01, Xoodyak_Rhash)@
@         X       += Xoodyak_Rhash@
@         XLen    -= Xoodyak_Rhash@
@     } while (XLen >= Xoodyak_Rhash)@
@
@     return initialLength - XLen@
@ }
@
    .align  4
.global Xoodyak_AbsorbHashFullBlocks
.type	Xoodyak_AbsorbHashFullBlocks, %function;
Xoodyak_AbsorbHashFullBlocks:
    push    {r4-r12,lr}
    mov     r4, r2                    @ r4 initialLength
    subs    r2, r2, #16
    ldr     r5, =Xoodyak_AbsorbHashFullBlocks_Ret
    push    {r0-r5}
    ldmia   r0, {r2-r12,lr}
Xoodyak_AbsorbHashFullBlocks_Loop:
    b       Xoodoo_Permute_12roundsAsm
Xoodyak_AbsorbHashFullBlocks_Ret:
    ldr     r0, [sp, #offsetAbsorbX]
    ldr     r1, [r0], #4
    eors    r2, r2, r1
    ldr     r1, [r0], #4
    eors    r3, r3, r1
    ldr     r1, [r0], #4
    eors    r4, r4, r1
    ldr     r1, [r0], #4
    eors    r6, r6, #1
    eors    r5, r5, r1
    ldr     r1, [sp, #offsetAbsorbXLen]
    str     r0, [sp, #offsetAbsorbX]
    subs    r1, r1, #16
    str     r1, [sp, #offsetAbsorbXLen]
    bcs     Xoodyak_AbsorbHashFullBlocks_Loop
    ldr     r0, [sp, #offsetInstance]
    stmia   r0, {r2-r12,lr}
    pop     {r0-r5}
    adds    r2, r2, #16
    sub     r0, r4, r2
    pop     {r4-r12,pc}


@ ----------------------------------------------------------------------------
@
@ size_t Xoodyak_SqueezeKeyedFullBlocks(void *state, uint8_t *Y, size_t YLen)
@ {
@     size_t  initialLength = YLen@
@
@     do {
@         SnP_AddByte(state, 0x01, 0)@  /* Xoodyak_Down(instance, NULL, 0, 0)@ */
@         SnP_Permute(state )@          /* Xoodyak_Up(instance, Y, Xoodyak_Rkout, 0)@ */
@         SnP_ExtractBytes(state, Y, 0, Xoodyak_Rkout)@
@         Y    += Xoodyak_Rkout@
@         YLen -= Xoodyak_Rkout@
@     } while (YLen >= Xoodyak_Rkout)@
@
@     return initialLength - YLen@
@ }
@
.equ offsetSqueezeY         , 4
.equ offsetSqueezeYLen      , 8

    .align  4
.global Xoodyak_SqueezeKeyedFullBlocks
.type	Xoodyak_SqueezeKeyedFullBlocks, %function;
Xoodyak_SqueezeKeyedFullBlocks:
    push    {r4-r12,lr}
    mov     r4, r2                    @ r4 initialLength
    subs    r2, r2, #24
    ldr     r5, =Xoodyak_SqueezeKeyedFullBlocks_Ret
    push    {r0-r5}
    ldmia   r0, {r2-r12,lr}
Xoodyak_SqueezeKeyedFullBlocks_Loop:
    eors    r2, r2, #1
    b       Xoodoo_Permute_12roundsAsm
Xoodyak_SqueezeKeyedFullBlocks_Ret:
    ldr     r0, [sp, #offsetSqueezeY]
    str     r2, [r0], #4
    str     r3, [r0], #4
    str     r4, [r0], #4
    str     r5, [r0], #4
    str     r6, [r0], #4
    str     r7, [r0], #4
    ldr     r1, [sp, #offsetSqueezeYLen]
    str     r0, [sp, #offsetSqueezeY]
    subs    r1, r1, #24
    str     r1, [sp, #offsetSqueezeYLen]
    bcs     Xoodyak_SqueezeKeyedFullBlocks_Loop
    ldr     r0, [sp, #offsetInstance]
    stmia   r0, {r2-r12,lr}
    pop     {r0-r5}
    adds    r2, r2, #24
    sub     r0, r4, r2
    pop     {r4-r12,pc}


@ ----------------------------------------------------------------------------
@
@ size_t Xoodyak_SqueezeHashFullBlocks(void *state, uint8_t *Y, size_t YLen)
@ {
@     size_t  initialLength = YLen@
@
@     do {
@         SnP_AddByte(state, 0x01, 0)@  /* Xoodyak_Down(instance, NULL, 0, 0)@ */
@         SnP_Permute(state)@           /* Xoodyak_Up(instance, Y, Xoodyak_Rhash, 0)@ */
@         SnP_ExtractBytes(state, Y, 0, Xoodyak_Rhash)@
@         Y    += Xoodyak_Rhash@
@         YLen -= Xoodyak_Rhash@
@     } while (YLen >= Xoodyak_Rhash)@
@
@     return initialLength - YLen@
@ }
@
    .align  4
.global Xoodyak_SqueezeHashFullBlocks
.type	Xoodyak_SqueezeHashFullBlocks, %function;
Xoodyak_SqueezeHashFullBlocks:
    push    {r4-r12,lr}
    mov     r4, r2                    @ r4 initialLength
    subs    r2, r2, #16
    ldr     r5, =Xoodyak_SqueezeHashFullBlocks_Ret
    push    {r0-r5}
    ldmia   r0, {r2-r12,lr}
Xoodyak_SqueezeHashFullBlocks_Loop:
    eors    r2, r2, #1
    b       Xoodoo_Permute_12roundsAsm
Xoodyak_SqueezeHashFullBlocks_Ret:
    ldr     r0, [sp, #offsetSqueezeY]
    str     r2, [r0], #4
    str     r3, [r0], #4
    str     r4, [r0], #4
    str     r5, [r0], #4
    ldr     r1, [sp, #offsetSqueezeYLen]
    str     r0, [sp, #offsetSqueezeY]
    subs    r1, r1, #16
    str     r1, [sp, #offsetSqueezeYLen]
    bcs     Xoodyak_SqueezeHashFullBlocks_Loop
    ldr     r0, [sp, #offsetInstance]
    stmia   r0, {r2-r12,lr}
    pop     {r0-r5}
    adds    r2, r2, #16
    sub     r0, r4, r2
    pop     {r4-r12,pc}


@ ----------------------------------------------------------------------------
@
@ size_t Xoodyak_EncryptFullBlocks(void *state, const uint8_t *I, uint8_t *O, size_t IOLen)
@ {
@     size_t  initialLength = IOLen@
@
@     do {
@         SnP_Permute(state)@
@         SnP_ExtractAndAddBytes(state, I, O, 0, Xoodyak_Rkout)@
@         SnP_OverwriteBytes(state, O, 0, Xoodyak_Rkout)@
@         SnP_AddByte(state, 0x01, Xoodyak_Rkout)@
@         I       += Xoodyak_Rkout@
@         O       += Xoodyak_Rkout@
@         IOLen   -= Xoodyak_Rkout@
@     } while (IOLen >= Xoodyak_Rkout)@
@
@     return initialLength - IOLen@
@ }
@
.equ offsetCryptI           , 4+8
.equ offsetCryptO           , 8+8
.equ offsetCryptIOLen       , 12

    .align  4
.global Xoodyak_EncryptFullBlocks
.type	Xoodyak_EncryptFullBlocks, %function;
Xoodyak_EncryptFullBlocks:
    push    {r4-r12,lr}
    mov     r4, r3                    @ r4 initialLength
    subs    r3, r3, #24
    ldr     r5, =Xoodyak_EncryptFullBlocks_Ret
    push    {r0-r5}
    ldmia   r0, {r2-r12,lr}
Xoodyak_EncryptFullBlocks_Loop:
    b       Xoodoo_Permute_12roundsAsm
Xoodyak_EncryptFullBlocks_Ret:
    push    {r10, r11}
    ldr     r11, [sp, #offsetCryptI]
    ldr     r10, [sp, #offsetCryptO]
    ldr     r0, [r11], #4
    ldr     r1, [r11], #4
    eors    r2, r2, r0
    str     r2, [r10], #4
    eors    r3, r3, r1
    ldr     r0, [r11], #4
    str     r3, [r10], #4
    eors    r4, r4, r0
    ldr     r1, [r11], #4
    str     r4, [r10], #4
    eors    r5, r5, r1
    ldr     r0, [r11], #4
    str     r5, [r10], #4
    eors    r6, r6, r0
    ldr     r1, [r11], #4
    str     r6, [r10], #4
    eors    r7, r7, r1
    str     r7, [r10], #4
    str     r10, [sp, #offsetCryptO]
    str     r11, [sp, #offsetCryptI]
    pop     {r10, r11}
    ldr     r0, [sp, #offsetCryptIOLen]
    eors    r8, r8, #1
    subs    r0, r0, #24
    str     r0, [sp, #offsetCryptIOLen]
    bcs     Xoodyak_EncryptFullBlocks_Loop
    ldr     r0, [sp, #offsetInstance]
    stmia   r0, {r2-r12,lr}
    pop     {r0-r5}
    adds    r3, r3, #24
    sub     r0, r4, r3
    pop     {r4-r12,pc}


@ ----------------------------------------------------------------------------
@
@ size_t Xoodyak_DecryptFullBlocks(void *state, const uint8_t *I, uint8_t *O, size_t IOLen)
@ {
@     size_t  initialLength = IOLen@
@
@     do {
@         SnP_Permute(state)@
@         SnP_ExtractAndAddBytes(state, I, O, 0, Xoodyak_Rkout)@
@         SnP_AddBytes(state, O, 0, Xoodyak_Rkout)@
@         SnP_AddByte(state, 0x01, Xoodyak_Rkout)@
@         I       += Xoodyak_Rkout@
@         O       += Xoodyak_Rkout@
@         IOLen   -= Xoodyak_Rkout@
@     } while (IOLen >= Xoodyak_Rkout)@
@
@     return initialLength - IOLen@
@ }
@
    .align  4
.global Xoodyak_DecryptFullBlocks
.type	Xoodyak_DecryptFullBlocks, %function;
Xoodyak_DecryptFullBlocks:
    push    {r4-r12,lr}
    mov     r4, r3                    @ r4 initialLength
    subs    r3, r3, #24
    ldr     r5, =Xoodyak_DecryptFullBlocks_Ret
    push    {r0-r5}
    ldmia   r0, {r2-r12,lr}
Xoodyak_DecryptFullBlocks_Loop:
    b       Xoodoo_Permute_12roundsAsm
Xoodyak_DecryptFullBlocks_Ret:
    push    {r10, r11}
    ldr     r11, [sp, #offsetCryptI]
    ldr     r10, [sp, #offsetCryptO]
    ldr     r0, [r11], #4
    ldr     r1, [r11], #4
    eors    r2, r2, r0
    str     r2, [r10], #4
    mov     r2, r0
    eors    r3, r3, r1
    ldr     r0, [r11], #4
    str     r3, [r10], #4
    mov     r3, r1
    eors    r4, r4, r0
    ldr     r1, [r11], #4
    str     r4, [r10], #4
    mov     r4, r0
    eors    r5, r5, r1
    ldr     r0, [r11], #4
    str     r5, [r10], #4
    mov     r5, r1
    eors    r6, r6, r0
    ldr     r1, [r11], #4
    str     r6, [r10], #4
    mov     r6, r0
    eors    r7, r7, r1
    str     r7, [r10], #4
    mov     r7, r1
    str     r10, [sp, #offsetCryptO]
    str     r11, [sp, #offsetCryptI]
    pop     {r10, r11}
    ldr     r0, [sp, #offsetCryptIOLen]
    eors    r8, r8, #1
    subs    r0, r0, #24
    str     r0, [sp, #offsetCryptIOLen]
    bcs     Xoodyak_DecryptFullBlocks_Loop
    ldr     r0, [sp, #offsetInstance]
    stmia   r0, {r2-r12,lr}
    pop     {r0-r5}
    adds    r3, r3, #24
    sub     r0, r4, r3
    pop     {r4-r12,pc}