introducing the tweak on skein

[avr-crypto-lib.git] / skein / threefish1024_enc_asm.S

diff --git a/skein/threefish1024_enc_asm.S b/skein/threefish1024_enc_asm.S
index 38bf04c587320b8dcb03bd2a6dde00ef9a23d356..f88b3ff70c93d7a57750f529d00904bf23ef36ea 100644 (file)
--- a/skein/threefish1024_enc_asm.S
+++ b/skein/threefish1024_enc_asm.S
@@ -21,7 +21,7 @@
  * \email   daniel.otte@rub.de
  * \date    2009-03-24
  * \license GPLv3 or later
- */ 
+ */
 
 #include "avr-asm-macros.S"
 
@@ -113,7 +113,7 @@ threefish1024_init:
        dec r26
        brne 1b
        rjmp 9f
-3:     
+3:
        ld A0, X+
        ld A1, X+
        ld A2, X+
@@ -165,7 +165,7 @@ threefish1024_init:
 9:
        pop_range 14, 17
        ret
-       
+
 /******************************************************************************/
 /*
 #define X(a) (((uint64_t*)data)[(a)])
@@ -208,7 +208,7 @@ void threefish1024_enc(void* data, const threefish1024_ctx_t* ctx){
        uint8_t r4[8] = {16, 14, 21, 44, 51, 43, 19, 37};
        uint8_t r5[8] = {22, 13, 12,  9,  9, 42, 18, 48};
        uint8_t r6[8] = {38, 52, 32, 59, 35, 40,  2, 53};
-       uint8_t r7[8] = {12, 57, 54, 34, 41, 15, 56, 56};       
+       uint8_t r7[8] = {12, 57, 54, 34, 41, 15, 56, 56};
        do{
                if(i%4==0){
                        add_key_16(data, ctx, s);
@@ -256,7 +256,7 @@ threefish1024_enc:
        movw CTX0, r22
        clr I
        clr S
-1:     
+1:
        mov r30,  I
        andi r30, 0x03
        breq 2f
@@ -405,8 +405,8 @@ exit:
        pop_range 2, 17
        pop r29
        pop r28
-       ret     
-4:     
+       ret
+4:
        /* call mix */
        ldi r30, lo8(threefish1024_rc0)
        ldi r31, hi8(threefish1024_rc0)
@@ -434,7 +434,7 @@ exit:
        push IDX4
        push IDX3
        push IDX2
-       
+
        movw r24, DATA0
        call threefish_mix_asm /* no rcall? */
        movw r24, DATA0
@@ -488,7 +488,7 @@ exit:
        movw r30, DATA0
        adiw r30, 7*8
        rcall xchg_zx8
-       /* --- */       
+       /* --- */
        movw r26, DATA0  /* X3 <-> X11 */
        adiw r26, 3*8
        movw r30, DATA0
@@ -535,7 +535,7 @@ exit:
        movw r30, DATA0
        adiw r30, 6*8
        rcall xchg_zx8
-               
+
        inc I
 ;      mov r26, I
 ;      cpi r26, 5
@@ -543,8 +543,8 @@ exit:
 ;      rjmp exit
 9:
        rjmp 1b
-       
-threefish1024_slut17:  
+
+threefish1024_slut17:
        .byte 0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38
        .byte 0x40, 0x48, 0x50, 0x58, 0x60, 0x68, 0x70, 0x78
        .byte 0x80, 0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30
@@ -555,14 +555,24 @@ threefish1024_slut3:
        .byte 0x10, 0x00, 0x08, 0x10, 0x00, 0x08, 0x10, 0x00
        .byte 0x08, 0x10, 0x00, 0x08, 0x10, 0x00, 0x08, 0x10
        .byte 0x00
-threefish1024_rc0: .byte 0x79, 0x31, 0x41, 0x42, 0x34, 0x21, 0x72, 0x69 
-threefish1024_rc1: .byte 0x53, 0x31, 0x10, 0x53, 0x19, 0x1a, 0x19, 0x61 
-threefish1024_rc2: .byte 0x5b, 0x6a, 0x22, 0x31, 0x69, 0x22, 0x40, 0x33 
-threefish1024_rc3: .byte 0x50, 0x2b, 0x71, 0x74, 0x60, 0x31, 0x6b, 0x72 
-threefish1024_rc4: .byte 0x20, 0x2a, 0x3b, 0x54, 0x63, 0x53, 0x23, 0x5b 
-threefish1024_rc5: .byte 0x3a, 0x2b, 0x14, 0x11, 0x11, 0x52, 0x22, 0x60 
-threefish1024_rc6: .byte 0x5a, 0x64, 0x40, 0x73, 0x43, 0x50, 0x02, 0x7b 
-threefish1024_rc7: .byte 0x14, 0x71, 0x7a, 0x42, 0x51, 0x29, 0x70, 0x70 
+/* old round constants
+threefish1024_rc0: .byte 0x79, 0x31, 0x41, 0x42, 0x34, 0x21, 0x72, 0x69
+threefish1024_rc1: .byte 0x53, 0x31, 0x10, 0x53, 0x19, 0x1a, 0x19, 0x61
+threefish1024_rc2: .byte 0x5b, 0x6a, 0x22, 0x31, 0x69, 0x22, 0x40, 0x33
+threefish1024_rc3: .byte 0x50, 0x2b, 0x71, 0x74, 0x60, 0x31, 0x6b, 0x72
+threefish1024_rc4: .byte 0x20, 0x2a, 0x3b, 0x54, 0x63, 0x53, 0x23, 0x5b
+threefish1024_rc5: .byte 0x3a, 0x2b, 0x14, 0x11, 0x11, 0x52, 0x22, 0x60
+threefish1024_rc6: .byte 0x5a, 0x64, 0x40, 0x73, 0x43, 0x50, 0x02, 0x7b
+threefish1024_rc7: .byte 0x14, 0x71, 0x7a, 0x42, 0x51, 0x29, 0x70, 0x70
+*/
+threefish1024_rc0:  .byte 0x30, 0x5a, 0x41, 0x1b, 0x51, 0x20, 0x49, 0x11
+threefish1024_rc1:  .byte 0x2b, 0x23, 0x04, 0x24, 0x11, 0x42, 0x54, 0x60
+threefish1024_rc2:  .byte 0x10, 0x12, 0x63, 0x60, 0x5b, 0x70, 0x69, 0x43
+threefish1024_rc3:  .byte 0x69, 0x79, 0x2b, 0x51, 0x49, 0x63, 0x6a, 0x64
+threefish1024_rc4:  .byte 0x10, 0x61, 0x42, 0x69, 0x14, 0x04, 0x23, 0x39
+threefish1024_rc5:  .byte 0x21, 0x22, 0x51, 0x34, 0x69, 0x7b, 0x52, 0x49
+threefish1024_rc6:  .byte 0x3a, 0x39, 0x73, 0x20, 0x54, 0x52, 0x54, 0x5b
+threefish1024_rc7:  .byte 0x5b, 0x64, 0x21, 0x31, 0x4a, 0x51, 0x31, 0x24
 
 add_z_to_x8:
        ld r0, Z+
@@ -599,16 +609,16 @@ add_z_to_x8:
        st X+, r1
        clr r1
        ret
-       
+
 T0 = IDX0
 T1 = 0
-CNT = 24       
+CNT = 24
 xchg_zx8:
        ldi CNT, 8
 1:     ld T0, X
        ld T1, Z
        st X+, T1
-       st Z+, T0       
+       st Z+, T0
        dec CNT
        brne 1b
        ret