--- /dev/null
+/*
+ * File: cast5.c
+ * Author: Daniel Otte
+ * Date: 26.07.2006
+ * License: GPL
+ * Description: Implementation of the CAST5 (aka CAST-128) cipher algorithm as described in RFC 2144
+ *
+ */
+ //pgm_read_dword
+
+ #include <stdint.h>
+ #include <string.h>
+ #include "cast5.h"
+ #include "config.h"
+ #include "uart.h"
+ #include "debug.h"
+
+ #undef DEBUG
+
+#include "cast5-sbox.h"
+
+
+
+#define S5(x) pgm_read_dword(&s5[(x)])
+#define S6(x) pgm_read_dword(&s6[(x)])
+#define S7(x) pgm_read_dword(&s7[(x)])
+#define S8(x) pgm_read_dword(&s8[(x)])
+
+
+void cast5_init_A(uint8_t *dest, uint8_t *src, bool bmode){
+ uint8_t mask = bmode?0x8:0;
+ *((uint32_t*)(&dest[0x0])) = *((uint32_t*)(&src[0x0^mask])) ^ S5(src[0xD^mask]) ^ S6(src[0xF^mask]) ^ S7(src[0xC^mask]) ^ S8(src[0xE^mask]) ^ S7(src[0x8^mask]);
+ *((uint32_t*)(&dest[0x4])) = *((uint32_t*)(&src[0x8^mask])) ^ S5(dest[0x0]) ^ S6(dest[0x2]) ^ S7(dest[0x1]) ^ S8(dest[0x3]) ^ S8(src[0xA^mask]);
+ *((uint32_t*)(&dest[0x8])) = *((uint32_t*)(&src[0xC^mask])) ^ S5(dest[0x7]) ^ S6(dest[0x6]) ^ S7(dest[0x5]) ^ S8(dest[0x4]) ^ S5(src[0x9^mask]);
+ *((uint32_t*)(&dest[0xC])) = *((uint32_t*)(&src[0x4^mask])) ^ S5(dest[0xA]) ^ S6(dest[0x9]) ^ S7(dest[0xB]) ^ S8(dest[0x8]) ^ S6(src[0xB^mask]);
+}
+
+void cast5_init_M(uint8_t *dest, uint8_t *src, bool nmode, bool xmode){
+ uint8_t nmt[] = {0xB, 0xA, 0x9, 0x8, 0xF, 0xE, 0xD, 0xC, 0x3, 0x2, 0x1, 0x0, 0x7, 0x6, 0x5, 0x4}; /* nmode table */
+ uint8_t xmt[4][4] = {{0x2, 0x6, 0x9, 0xC}, {0x8, 0xD, 0x3, 0x7}, {0x3, 0x7, 0x8, 0xD}, {0x9, 0xC, 0x2, 0x6}};
+ #define NMT(x) (src[nmode?nmt[(x)]:(x)])
+ #define XMT(x) (src[xmt[(xmode<<1) + nmode][(x)]])
+ *((uint32_t*)(&dest[0x0])) = S5(NMT(0x8)) ^ S6(NMT(0x9)) ^ S7(NMT(0x7)) ^ S8(NMT(0x6)) ^ S5(XMT(0));
+ *((uint32_t*)(&dest[0x4])) = S5(NMT(0xA)) ^ S6(NMT(0xB)) ^ S7(NMT(0x5)) ^ S8(NMT(0x4)) ^ S6(XMT(1));
+ *((uint32_t*)(&dest[0x8])) = S5(NMT(0xC)) ^ S6(NMT(0xD)) ^ S7(NMT(0x3)) ^ S8(NMT(0x2)) ^ S7(XMT(2));
+ *((uint32_t*)(&dest[0xC])) = S5(NMT(0xE)) ^ S6(NMT(0xF)) ^ S7(NMT(0x1)) ^ S8(NMT(0x0)) ^ S8(XMT(3));
+}
+
+#define S5B(x) pgm_read_byte(3+(uint8_t*)(&s5[(x)]))
+#define S6B(x) pgm_read_byte(3+(uint8_t*)(&s6[(x)]))
+#define S7B(x) pgm_read_byte(3+(uint8_t*)(&s7[(x)]))
+#define S8B(x) pgm_read_byte(3+(uint8_t*)(&s8[(x)]))
+
+void cast5_init_rM(uint8_t *klo, uint8_t *khi, uint8_t offset, uint8_t *src, bool nmode, bool xmode){
+ uint8_t nmt[] = {0xB, 0xA, 0x9, 0x8, 0xF, 0xE, 0xD, 0xC, 0x3, 0x2, 0x1, 0x0, 0x7, 0x6, 0x5, 0x4}; /* nmode table */
+ uint8_t xmt[4][4] = {{0x2, 0x6, 0x9, 0xC}, {0x8, 0xD, 0x3, 0x7}, {0x3, 0x7, 0x8, 0xD}, {0x9, 0xC, 0x2, 0x6}};
+ uint8_t t, h=0;
+ t = S5B(NMT(0x8)) ^ S6B(NMT(0x9)) ^ S7B(NMT(0x7)) ^ S8B(NMT(0x6)) ^ S5B(XMT(0));
+ klo[offset*2] |= (t & 0x0f);
+ h |= (t&0x10); h>>=1;
+ t = S5B(NMT(0xA)) ^ S6B(NMT(0xB)) ^ S7B(NMT(0x5)) ^ S8B(NMT(0x4)) ^ S6B(XMT(1));
+ klo[offset*2] |= (t<<4) & 0xf0;
+ h |= t&0x10; h>>=1;
+ t = S5B(NMT(0xC)) ^ S6B(NMT(0xD)) ^ S7B(NMT(0x3)) ^ S8B(NMT(0x2)) ^ S7B(XMT(2));
+ klo[offset*2+1] |= t&0xf;
+ h |= t&0x10; h>>=1;
+ t = S5B(NMT(0xE)) ^ S6B(NMT(0xF)) ^ S7B(NMT(0x1)) ^ S8B(NMT(0x0)) ^ S8B(XMT(3));
+ klo[offset*2+1] |= t<<4;
+ h |= t&0x10; h >>=1;
+ #ifdef DEBUG
+ uart_putstr("\r\n\t h="); uart_hexdump(&h,1);
+ #endif
+ khi[offset>>1] |= h<<((offset&0x1)?4:0);
+}
+
+#define S_5X(s) pgm_read_dword(&s5[BPX[(s)]])
+#define S_6X(s) pgm_read_dword(&s6[BPX[(s)]])
+#define S_7X(s) pgm_read_dword(&s7[BPX[(s)]])
+#define S_8X(s) pgm_read_dword(&s8[BPX[(s)]])
+
+#define S_5Z(s) pgm_read_dword(&s5[BPZ[(s)]])
+#define S_6Z(s) pgm_read_dword(&s6[BPZ[(s)]])
+#define S_7Z(s) pgm_read_dword(&s7[BPZ[(s)]])
+#define S_8Z(s) pgm_read_dword(&s8[BPZ[(s)]])
+
+
+
+
+void cast5_init(cast5_ctx_t* s, uint8_t* key, uint8_t keylength){
+ /* we migth return if the key is valid and if setup was sucessfull */
+ uint32_t x[4], z[4];
+ #define BPX ((uint8_t*)&(x[0]))
+ #define BPZ ((uint8_t*)&(z[0]))
+ s->shortkey = (keylength<=80);
+ /* littel endian only! */
+ memset(&(x[0]), 0 ,16); /* set x to zero */
+ memcpy(&(x[0]), key, keylength/8);
+
+
+ /* todo: merge a and b and compress the whole stuff */
+ /***** A *****/
+ cast5_init_A((uint8_t*)(&z[0]), (uint8_t*)(&x[0]), false);
+ /***** M *****/
+ cast5_init_M((uint8_t*)(&(s->mask[0])), (uint8_t*)(&z[0]), false, false);
+ /***** B *****/
+ cast5_init_A((uint8_t*)(&x[0]), (uint8_t*)(&z[0]), true);
+ /***** N *****/
+ cast5_init_M((uint8_t*)(&(s->mask[4])), (uint8_t*)(&x[0]), true, false);
+ /***** A *****/
+ cast5_init_A((uint8_t*)(&z[0]), (uint8_t*)(&x[0]), false);
+ /***** N' *****/
+ cast5_init_M((uint8_t*)(&(s->mask[8])), (uint8_t*)(&z[0]), true, true);
+ /***** B *****/
+ cast5_init_A((uint8_t*)(&x[0]), (uint8_t*)(&z[0]), true);
+ /***** M' *****/
+ cast5_init_M((uint8_t*)(&(s->mask[12])), (uint8_t*)(&x[0]), false, true);
+
+ /* that were the masking keys, now the rotation keys */
+ /* set the keys to zero */
+ memset(&(s->rotl[0]),0,8);
+ s->roth[0]=s->roth[1]=0;
+ /***** A *****/
+ cast5_init_A((uint8_t*)(&z[0]), (uint8_t*)(&x[0]), false);
+ /***** M *****/
+ cast5_init_rM(&(s->rotl[0]), &(s->roth[0]), 0, (uint8_t*)(&z[0]), false, false);
+ /***** B *****/
+ cast5_init_A((uint8_t*)(&x[0]), (uint8_t*)(&z[0]), true);
+ /***** N *****/
+ cast5_init_rM(&(s->rotl[0]), &(s->roth[0]), 1, (uint8_t*)(&x[0]), true, false);
+ /***** A *****/
+ cast5_init_A((uint8_t*)(&z[0]), (uint8_t*)(&x[0]), false);
+ /***** N' *****/
+ cast5_init_rM(&(s->rotl[0]), &(s->roth[0]), 2, (uint8_t*)(&z[0]), true, true);
+ /***** B *****/
+ cast5_init_A((uint8_t*)(&x[0]), (uint8_t*)(&z[0]), true);
+ /***** M' *****/
+ cast5_init_rM(&(s->rotl[0]), &(s->roth[0]), 3, (uint8_t*)(&x[0]), false, true);
+ /* done ;-) */
+}
+
+
+
+/********************************************************************************************************/
+
+#define ROTL32(a,n) ((a)<<(n) | (a)>>(32-(n)))
+#define CHANGE_ENDIAN32(x) ((x)<<24 | (x)>>24 | ((x)&0xff00)<<8 | ((x)&0xff0000)>>8 )
+
+typedef uint32_t cast5_f_t(uint32_t,uint32_t,uint8_t);
+
+#define IA 3
+#define IB 2
+#define IC 1
+#define ID 0
+
+
+uint32_t cast5_f1(uint32_t d, uint32_t m, uint8_t r){
+ uint32_t t;
+ t = ROTL32((d + m),r);
+#ifdef DEBUG
+ uint32_t ia,ib,ic,id;
+ uart_putstr("\r\n f1("); uart_hexdump(&d, 4); uart_putc(',');
+ uart_hexdump(&m , 4); uart_putc(','); uart_hexdump(&r, 1);uart_putstr("): I=");
+ uart_hexdump(&t, 4);
+ ia = pgm_read_dword(&s1[((uint8_t*)&t)[IA]] );
+ ib = pgm_read_dword(&s2[((uint8_t*)&t)[IB]] );
+ ic = pgm_read_dword(&s3[((uint8_t*)&t)[IC]] );
+ id = pgm_read_dword(&s4[((uint8_t*)&t)[ID]] );
+ uart_putstr("\r\n\tIA="); uart_hexdump(&ia, 4);
+ uart_putstr("\r\n\tIB="); uart_hexdump(&ib, 4);
+ uart_putstr("\r\n\tIC="); uart_hexdump(&ic, 4);
+ uart_putstr("\r\n\tID="); uart_hexdump(&id, 4);
+
+ return (((ia ^ ib) - ic) + id);
+
+#else
+
+ return (((pgm_read_dword(&s1[((uint8_t*)&t)[IA]] ) ^ pgm_read_dword(&s2[((uint8_t*)&t)[IB]] ))
+ - pgm_read_dword(&s3[((uint8_t*)&t)[IC]] )) + pgm_read_dword(&s4[((uint8_t*)&t)[ID]]));
+
+#endif
+}
+
+
+uint32_t cast5_f2(uint32_t d, uint32_t m, uint8_t r){
+ uint32_t t;
+ t = ROTL32((d ^ m),r);
+#ifdef DEBUG
+ uint32_t ia,ib,ic,id;
+ uart_putstr("\r\n f2("); uart_hexdump(&d, 4); uart_putc(',');
+ uart_hexdump(&m , 4); uart_putc(','); uart_hexdump(&r, 1);uart_putstr("): I=");
+ uart_hexdump(&t, 4);
+
+ ia = pgm_read_dword(&s1[((uint8_t*)&t)[IA]] );
+ ib = pgm_read_dword(&s2[((uint8_t*)&t)[IB]] );
+ ic = pgm_read_dword(&s3[((uint8_t*)&t)[IC]] );
+ id = pgm_read_dword(&s4[((uint8_t*)&t)[ID]] );
+
+ uart_putstr("\r\n\tIA="); uart_hexdump(&ia, 4);
+ uart_putstr("\r\n\tIB="); uart_hexdump(&ib, 4);
+ uart_putstr("\r\n\tIC="); uart_hexdump(&ic, 4);
+ uart_putstr("\r\n\tID="); uart_hexdump(&id, 4);
+
+ return (((ia - ib) + ic) ^ id);
+#else
+
+ return (((pgm_read_dword(&s1[((uint8_t*)&t)[IA]] ) - pgm_read_dword(&s2[((uint8_t*)&t)[IB]] ))
+ + pgm_read_dword(&s3[((uint8_t*)&t)[IC]] )) ^ pgm_read_dword(&s4[((uint8_t*)&t)[ID]]));
+
+#endif
+}
+
+uint32_t cast5_f3(uint32_t d, uint32_t m, uint8_t r){
+ uint32_t t;
+ t = ROTL32((m - d),r);
+
+#ifdef DEBUG
+ uint32_t ia,ib,ic,id;
+
+ uart_putstr("\r\n f3("); uart_hexdump(&d, 4); uart_putc(',');
+ uart_hexdump(&m , 4); uart_putc(','); uart_hexdump(&r, 1);uart_putstr("): I=");
+ uart_hexdump(&t, 4);
+
+ ia = pgm_read_dword(&s1[((uint8_t*)&t)[IA]] );
+ ib = pgm_read_dword(&s2[((uint8_t*)&t)[IB]] );
+ ic = pgm_read_dword(&s3[((uint8_t*)&t)[IC]] );
+ id = pgm_read_dword(&s4[((uint8_t*)&t)[ID]] );
+
+ uart_putstr("\r\n\tIA="); uart_hexdump(&ia, 4);
+ uart_putstr("\r\n\tIB="); uart_hexdump(&ib, 4);
+ uart_putstr("\r\n\tIC="); uart_hexdump(&ic, 4);
+ uart_putstr("\r\n\tID="); uart_hexdump(&id, 4);
+ return (((ia + ib) ^ ic) - id);
+#else
+ return ((pgm_read_dword(&s1[((uint8_t*)&t)[IA]] ) + pgm_read_dword(&s2[((uint8_t*)&t)[IB]] ))
+ ^ pgm_read_dword(&s3[((uint8_t*)&t)[IC]] )) - pgm_read_dword(&s4[((uint8_t*)&t)[ID]] );
+
+#endif
+}
+
+
+
+void cast5_enc(cast5_ctx_t *s, void* block){
+ uint32_t l,r, x, y;
+ uint8_t i;
+ cast5_f_t* f[]={cast5_f1,cast5_f2,cast5_f3};
+ l=((uint32_t*)block)[0];
+ r=((uint32_t*)block)[1];
+// uart_putstr("\r\n round[-1] = ");
+// uart_hexdump(&r, 4);
+ for (i=0;i<(s->shortkey?12:16);++i){
+ x = r;
+ y = (f[i%3])(CHANGE_ENDIAN32(r), CHANGE_ENDIAN32(s->mask[i]),
+ (((s->roth[i>>3]) & (1<<(i&0x7)))?0x10:0x00)
+ + ( ((s->rotl[i>>1])>>((i&1)?4:0)) & 0x0f) );
+ r = l ^ CHANGE_ENDIAN32(y);
+// uart_putstr("\r\n round["); DEBUG_B(i); uart_putstr("] = ");
+// uart_hexdump(&r, 4);
+ l = x;
+ }
+ ((uint32_t*)block)[0]=r;
+ ((uint32_t*)block)[1]=l;
+}
+
+
+void cast5_dec(cast5_ctx_t *s, void* block){
+ uint32_t l,r, x, y;
+ int8_t i, rounds;
+ cast5_f_t* f[]={cast5_f1,cast5_f2,cast5_f3};
+ l=((uint32_t*)block)[0];
+ r=((uint32_t*)block)[1];
+ rounds = (s->shortkey?12:16);
+ for (i=rounds-1; i>=0 ;--i){
+ x = r;
+ y = (f[i%3])(CHANGE_ENDIAN32(r), CHANGE_ENDIAN32(s->mask[i]),
+ (((s->roth[i>>3]) & (1<<(i&0x7)))?0x10:0x00)
+ + ( ((s->rotl[i>>1])>>((i&1)?4:0)) & 0x0f) );
+ r = l ^ CHANGE_ENDIAN32(y);
+ l = x;
+ }
+ ((uint32_t*)block)[0]=r;
+ ((uint32_t*)block)[1]=l;
+}
+
+
+/*********************************************************************************************************/
+/*********************************************************************************************************/
+/*********************************************************************************************************/
+
+#if 0
+
+void cast5_old_init(cast5_ctx_t* s, uint8_t* key, uint8_t keylength){
+ /* we migth return if the key is valid and if setup was sucessfull */
+ uint32_t x[4], z[4], t;
+ #define BPX ((uint8_t*)&(x[0]))
+ #define BPZ ((uint8_t*)&(z[0]))
+ s->shortkey = (keylength<=80);
+ /* littel endian only! */
+ memset(&(x[0]), 0 ,16); /* set x to zero */
+ memcpy(&(x[0]), key, keylength/8);
+
+
+ /* todo: merge a and b and compress the whole stuff */
+ /***** A *****/
+ z[0] = x[0] ^ S_5X(0xD) ^ S_6X(0xF) ^ S_7X(0xC) ^ S_8X(0xE) ^ S_7X(0x8);
+ z[1] = x[2] ^ S_5Z(0x0) ^ S_6Z(0x2) ^ S_7Z(0x1) ^ S_8Z(0x3) ^ S_8X(0xA);
+ z[2] = x[3] ^ S_5Z(0x7) ^ S_6Z(0x6) ^ S_7Z(0x5) ^ S_8Z(0x4) ^ S_5X(0x9);
+ z[3] = x[1] ^ S_5Z(0xA) ^ S_6Z(0x9) ^ S_7Z(0xB) ^ S_8Z(0x8) ^ S_6X(0xB);
+ /***** M *****/
+ s->mask[0] = S_5Z(0x8) ^ S_6Z(0x9) ^ S_7Z(0x7) ^ S_8Z(0x6) ^ S_5Z(0x2);
+ s->mask[1] = S_5Z(0xA) ^ S_6Z(0xB) ^ S_7Z(0x5) ^ S_8Z(0x4) ^ S_6Z(0x6);
+ s->mask[2] = S_5Z(0xC) ^ S_6Z(0xD) ^ S_7Z(0x3) ^ S_8Z(0x2) ^ S_7Z(0x9);
+ s->mask[3] = S_5Z(0xE) ^ S_6Z(0xF) ^ S_7Z(0x1) ^ S_8Z(0x0) ^ S_8Z(0xC);
+ /***** B *****/
+ x[0] = z[2] ^ S_5Z(0x5) ^ S_6Z(0x7) ^ S_7Z(0x4) ^ S_8Z(0x6) ^ S_7Z(0x0);
+ x[1] = z[0] ^ S_5X(0x0) ^ S_6X(0x2) ^ S_7X(0x1) ^ S_8X(0x3) ^ S_8Z(0x2);
+ x[2] = z[1] ^ S_5X(0x7) ^ S_6X(0x6) ^ S_7X(0x5) ^ S_8X(0x4) ^ S_5Z(0x1);
+ x[3] = z[3] ^ S_5X(0xA) ^ S_6X(0x9) ^ S_7X(0xB) ^ S_8X(0x8) ^ S_6Z(0x3);
+ /***** N *****/
+ s->mask[4] = S_5X(0x3) ^ S_6X(0x2) ^ S_7X(0xC) ^ S_8X(0xD) ^ S_5X(0x8);
+ s->mask[5] = S_5X(0x1) ^ S_6X(0x0) ^ S_7X(0xE) ^ S_8X(0xF) ^ S_6X(0xD);
+ s->mask[6] = S_5X(0x7) ^ S_6X(0x6) ^ S_7X(0x8) ^ S_8X(0x9) ^ S_7X(0x3);
+ s->mask[7] = S_5X(0x5) ^ S_6X(0x4) ^ S_7X(0xA) ^ S_8X(0xB) ^ S_8X(0x7);
+ /***** A *****/
+ z[0] = x[0] ^ S_5X(0xD) ^ S_6X(0xF) ^ S_7X(0xC) ^ S_8X(0xE) ^ S_7X(0x8);
+ z[1] = x[2] ^ S_5Z(0x0) ^ S_6Z(0x2) ^ S_7Z(0x1) ^ S_8Z(0x3) ^ S_8X(0xA);
+ z[2] = x[3] ^ S_5Z(0x7) ^ S_6Z(0x6) ^ S_7Z(0x5) ^ S_8Z(0x4) ^ S_5X(0x9);
+ z[3] = x[1] ^ S_5Z(0xA) ^ S_6Z(0x9) ^ S_7Z(0xB) ^ S_8Z(0x8) ^ S_6X(0xB);
+ /***** N' *****/
+ s->mask[8] = S_5Z(0x3) ^ S_6Z(0x2) ^ S_7Z(0xC) ^ S_8Z(0xD) ^ S_5Z(0x9);
+ s->mask[9] = S_5Z(0x1) ^ S_6Z(0x0) ^ S_7Z(0xE) ^ S_8Z(0xF) ^ S_6Z(0xC);
+ s->mask[10] = S_5Z(0x7) ^ S_6Z(0x6) ^ S_7Z(0x8) ^ S_8Z(0x9) ^ S_7Z(0x2);
+ s->mask[11] = S_5Z(0x5) ^ S_6Z(0x4) ^ S_7Z(0xA) ^ S_8Z(0xB) ^ S_8Z(0x6);
+ /***** B *****/
+ x[0] = z[2] ^ S_5Z(0x5) ^ S_6Z(0x7) ^ S_7Z(0x4) ^ S_8Z(0x6) ^ S_7Z(0x0);
+ x[1] = z[0] ^ S_5X(0x0) ^ S_6X(0x2) ^ S_7X(0x1) ^ S_8X(0x3) ^ S_8Z(0x2);
+ x[2] = z[1] ^ S_5X(0x7) ^ S_6X(0x6) ^ S_7X(0x5) ^ S_8X(0x4) ^ S_5Z(0x1);
+ x[3] = z[3] ^ S_5X(0xA) ^ S_6X(0x9) ^ S_7X(0xB) ^ S_8X(0x8) ^ S_6Z(0x3);
+ /***** M' *****/
+ s->mask[12] = S_5X(0x8) ^ S_6X(0x9) ^ S_7X(0x7) ^ S_8X(0x6) ^ S_5X(0x3);
+ s->mask[13] = S_5X(0xA) ^ S_6X(0xB) ^ S_7X(0x5) ^ S_8X(0x4) ^ S_6X(0x7);
+ s->mask[14] = S_5X(0xC) ^ S_6X(0xD) ^ S_7X(0x3) ^ S_8X(0x2) ^ S_7X(0x8);
+ s->mask[15] = S_5X(0xE) ^ S_6X(0xF) ^ S_7X(0x1) ^ S_8X(0x0) ^ S_8X(0xD);
+
+ /* that were the masking keys, now the rotation keys */
+ /* set the keys to zero */
+ memset(&(s->rotl[0]),0,8);
+ s->roth[0]=s->roth[1]=0;
+ /***** A *****/
+ z[0] = x[0] ^ S_5X(0xD) ^ S_6X(0xF) ^ S_7X(0xC) ^ S_8X(0xE) ^ S_7X(0x8);
+ z[1] = x[2] ^ S_5Z(0x0) ^ S_6Z(0x2) ^ S_7Z(0x1) ^ S_8Z(0x3) ^ S_8X(0xA);
+ z[2] = x[3] ^ S_5Z(0x7) ^ S_6Z(0x6) ^ S_7Z(0x5) ^ S_8Z(0x4) ^ S_5X(0x9);
+ z[3] = x[1] ^ S_5Z(0xA) ^ S_6Z(0x9) ^ S_7Z(0xB) ^ S_8Z(0x8) ^ S_6X(0xB);
+ /***** M *****/
+ t = S_5Z(0x8) ^ S_6Z(0x9) ^ S_7Z(0x7) ^ S_8Z(0x6) ^ S_5Z(0x2);
+ t >>= 24;
+ s->rotl[0] |= t & 0x0f;
+ s->roth[0] |= (t >> 4) & (1<<0);
+ t = S_5Z(0xA) ^ S_6Z(0xB) ^ S_7Z(0x5) ^ S_8Z(0x4) ^ S_6Z(0x6);
+ t >>= 24;
+ s->rotl[0] |= (t<<4) & 0xf0;
+ s->roth[0] |= (t >> 3) & (1<<1);
+ t = S_5Z(0xC) ^ S_6Z(0xD) ^ S_7Z(0x3) ^ S_8Z(0x2) ^ S_7Z(0x9);
+ t >>= 24;
+ s->rotl[1] |= t & 0x0f;
+ s->roth[0] |= (t >> 2) & (1<<2);
+ t = S_5Z(0xE) ^ S_6Z(0xF) ^ S_7Z(0x1) ^ S_8Z(0x0) ^ S_8Z(0xC);
+ t >>= 24;
+ s->rotl[1] |= (t<<4) & 0xf0;
+ s->roth[0] |= (t >> 1) & (1<<3);
+ /***** B *****/
+ x[0] = z[2] ^ S_5Z(0x5) ^ S_6Z(0x7) ^ S_7Z(0x4) ^ S_8Z(0x6) ^ S_7Z(0x0);
+ x[1] = z[0] ^ S_5X(0x0) ^ S_6X(0x2) ^ S_7X(0x1) ^ S_8X(0x3) ^ S_8Z(0x2);
+ x[2] = z[1] ^ S_5X(0x7) ^ S_6X(0x6) ^ S_7X(0x5) ^ S_8X(0x4) ^ S_5Z(0x1);
+ x[3] = z[3] ^ S_5X(0xA) ^ S_6X(0x9) ^ S_7X(0xB) ^ S_8X(0x8) ^ S_6Z(0x3);
+ /***** N *****/
+ t = S_5X(0x3) ^ S_6X(0x2) ^ S_7X(0xC) ^ S_8X(0xD) ^ S_5X(0x8);
+ t >>= 24;
+ s->rotl[2] |= t & 0x0f;
+ s->roth[0] |= t & (1<<4);
+ t = S_5X(0x1) ^ S_6X(0x0) ^ S_7X(0xE) ^ S_8X(0xF) ^ S_6X(0xD);
+ t >>= 24;
+ s->rotl[2] |= (t<<4) & 0xf0;
+ s->roth[0] |= (t<<1) & (1<<5);
+ t = S_5X(0x7) ^ S_6X(0x6) ^ S_7X(0x8) ^ S_8X(0x9) ^ S_7X(0x3);
+ t >>= 24;
+ s->rotl[3] |= t & 0x0f;
+ s->roth[0] |= (t<<2) & (1<<6);
+ t = S_5X(0x5) ^ S_6X(0x4) ^ S_7X(0xA) ^ S_8X(0xB) ^ S_8X(0x7);
+ t >>= 24;
+ s->rotl[3] |= (t<<4) & 0xf0;
+ s->roth[0] |= (t<<3) & (1<<7);
+ /***** A *****/
+ z[0] = x[0] ^ S_5X(0xD) ^ S_6X(0xF) ^ S_7X(0xC) ^ S_8X(0xE) ^ S_7X(0x8);
+ z[1] = x[2] ^ S_5Z(0x0) ^ S_6Z(0x2) ^ S_7Z(0x1) ^ S_8Z(0x3) ^ S_8X(0xA);
+ z[2] = x[3] ^ S_5Z(0x7) ^ S_6Z(0x6) ^ S_7Z(0x5) ^ S_8Z(0x4) ^ S_5X(0x9);
+ z[3] = x[1] ^ S_5Z(0xA) ^ S_6Z(0x9) ^ S_7Z(0xB) ^ S_8Z(0x8) ^ S_6X(0xB);
+ /***** N' *****/
+ t = S_5Z(0x3) ^ S_6Z(0x2) ^ S_7Z(0xC) ^ S_8Z(0xD) ^ S_5Z(0x9);
+ t >>= 24;
+ s->rotl[4] |= t & 0x0f;
+ s->roth[1] |= (t>>4) & (1<<0);
+ t = S_5Z(0x1) ^ S_6Z(0x0) ^ S_7Z(0xE) ^ S_8Z(0xF) ^ S_6Z(0xC);
+ t >>= 24;
+ s->rotl[4] |= (t<<4) & 0xf0;
+ s->roth[1] |= (t>>3) & (1<<1);
+ t = S_5Z(0x7) ^ S_6Z(0x6) ^ S_7Z(0x8) ^ S_8Z(0x9) ^ S_7Z(0x2);
+ t >>= 24;
+ s->rotl[5] |= t & 0x0f;
+ s->roth[1] |= (t>>2) & (1<<2);
+ t = S_5Z(0x5) ^ S_6Z(0x4) ^ S_7Z(0xA) ^ S_8Z(0xB) ^ S_8Z(0x6);
+ t >>= 24;
+ s->rotl[5] |= (t<<4) & 0xf0;
+ s->roth[1] |= (t>>1) & (1<<3);
+ /***** B *****/
+ x[0] = z[2] ^ S_5Z(0x5) ^ S_6Z(0x7) ^ S_7Z(0x4) ^ S_8Z(0x6) ^ S_7Z(0x0);
+ x[1] = z[0] ^ S_5X(0x0) ^ S_6X(0x2) ^ S_7X(0x1) ^ S_8X(0x3) ^ S_8Z(0x2);
+ x[2] = z[1] ^ S_5X(0x7) ^ S_6X(0x6) ^ S_7X(0x5) ^ S_8X(0x4) ^ S_5Z(0x1);
+ x[3] = z[3] ^ S_5X(0xA) ^ S_6X(0x9) ^ S_7X(0xB) ^ S_8X(0x8) ^ S_6Z(0x3);
+ /***** M' *****/
+ t = S_5X(0x8) ^ S_6X(0x9) ^ S_7X(0x7) ^ S_8X(0x6) ^ S_5X(0x3);
+ t >>= 24;
+ s->rotl[6] |= t & 0x0f;
+ s->roth[1] |= t & (1<<4);
+ t = S_5X(0xA) ^ S_6X(0xB) ^ S_7X(0x5) ^ S_8X(0x4) ^ S_6X(0x7);
+ t >>= 24;
+ s->rotl[6] |= (t<<4) & 0xf0;
+ s->roth[1] |= (t<<1) & (1<<5);
+ t = S_5X(0xC) ^ S_6X(0xD) ^ S_7X(0x3) ^ S_8X(0x2) ^ S_7X(0x8);
+ t >>= 24;
+ s->rotl[7] |= t & 0x0f;
+ s->roth[1] |= (t<<2) & (1<<6);
+ t = S_5X(0xE) ^ S_6X(0xF) ^ S_7X(0x1) ^ S_8X(0x0) ^ S_8X(0xD);
+ t >>= 24;
+ s->rotl[7] |= (t<<4) & 0xf0;
+ s->roth[1] |= (t<<3) & (1<<7);
+
+ /* done ;-) */
+}
+
+#endif
+
+
+
+
projects / avr-crypto-lib.git / blobdiff