* GPLv3 or later
*
*/
-SPL = 0x3D
-SPH = 0x3E
-SREG = 0x3F
-
-
-/*******************************************************************************
-
- void changeendian32(uint32_t * a){
- *a = (*a & 0x000000FF) << 24 |
- (*a & 0x0000FF00) << 8 |
- (*a & 0x00FF0000) >> 8 |
- (*a & 0xFF000000) >> 24;
- }
-
-*/
-/*
-.global changeendian32
-; === change_endian32 ===
-; function that changes the endianess of a 32-bit word
-; param1: the 32-bit word
-; given in r25,r24,r23,22 (r25 is most significant)
-; modifys: r21, r22
-changeendian32:
- movw r20, r22 ; (r22,r23) --> (r20,r21)
- mov r22, r25
- mov r23, r24
- mov r24, r21
- mov r25, r20
- ret
-
-*/
-
-/*******************************************************************************
- uint32_t bigendian_sum32(uint32_t a, uint32_t b){
- changeendian32(&a);
- changeendian32(&b);
- a += b;
- changeendian32(&a);
- return a;
- }
-*/
+#include "avr-asm-macros.S"
.global bigendian_sum32
; === bigendian_sum32 ===
sbc r23, r19
sbc r22, r18
ret
-
+/******************************************************************************/
+/*
+#define M0 0xfc
+#define M1 0xf3
+#define M2 0xcf
+#define M3 0x3f
+
+#define X3 (((uint8_t*)(&x))[0])
+#define X2 (((uint8_t*)(&x))[1])
+#define X1 (((uint8_t*)(&x))[2])
+#define X0 (((uint8_t*)(&x))[3])
+
+#define Z3 (((uint8_t*)(&z))[0])
+#define Z2 (((uint8_t*)(&z))[1])
+#define Z1 (((uint8_t*)(&z))[2])
+#define Z0 (((uint8_t*)(&z))[3])
+
+uint32_t g_function(uint32_t x){
+ uint32_t z;
+ / * sbox substitution * /
+ X3 = pgm_read_byte(&(seed_sbox2[X3]));
+ X2 = pgm_read_byte(&(seed_sbox1[X2]));
+ X1 = pgm_read_byte(&(seed_sbox2[X1]));
+ X0 = pgm_read_byte(&(seed_sbox1[X0]));
+ / * now the permutation * /
+ Z0 = (X0 & M0) ^ (X1 & M1) ^ (X2 & M2) ^ (X3 & M3);
+ Z1 = (X0 & M1) ^ (X1 & M2) ^ (X2 & M3) ^ (X3 & M0);
+ Z2 = (X0 & M2) ^ (X1 & M3) ^ (X2 & M0) ^ (X3 & M1);
+ Z3 = (X0 & M3) ^ (X1 & M0) ^ (X2 & M1) ^ (X3 & M2);
+ return z;
+}
+*/
+M0 = 0xfc
+M1 = 0xf3
+M2 = 0xcf
+M3 = 0x3f
+X0 = 18
+X1 = 19
+X2 = 20
+X3 = 21
+Z0 = 25
+Z1 = 24
+Z2 = 23
+Z3 = 22
+T0 = X0
+T1 = 26
+T2 = 27
+T3 = X1
+/*
+ * param x: r22:r25
+ * X0 = R25
+ * X1 = R24
+ * X2 = R23
+ * X3 = R22
+ */
+.global g_function
+g_function:
+ ldi r30, lo8(seed_sbox1)
+ ldi r31, hi8(seed_sbox1)
+ movw r26, r30
+ add r30, Z2
+ adc r31, r1
+ lpm X2, Z
+ movw r30, r26
+ add r30, Z0
+ adc r31, r1
+ lpm X0, Z
+ inc r27 /* switch X to point to sbox2 */
+ movw r30, r26
+ add r30, Z3
+ adc r31, r1
+ lpm X3, Z
+ movw r30, r26
+ add r30, Z1
+ adc r31, r1
+ lpm X1, Z
+ /* now the secound part */
+ mov Z0, X0
+ mov Z1, X0
+ mov Z2, X0
+ mov Z3, X0
+ andi Z0, M0
+ andi Z1, M1
+ andi Z2, M2
+ andi Z3, M3
+ mov T0, X1
+ mov T1, X1
+ mov T2, X1
+ ; mov T3, X1 /* T3 = X1 */
+ andi T0, M1
+ andi T1, M2
+ andi T2, M3
+ andi T3, M0
+ eor Z0, T0
+ eor Z1, T1
+ eor Z2, T2
+ eor Z3, T3
+ mov T0, X2
+ mov T1, X2
+ mov T2, X2
+ mov T3, X2
+ andi T0, M2
+ andi T1, M3
+ andi T2, M0
+ andi T3, M1
+ eor Z0, T0
+ eor Z1, T1
+ eor Z2, T2
+ eor Z3, T3
+ mov T0, X3
+ mov T1, X3
+ mov T2, X3
+ mov T3, X3
+ andi T0, M3
+ andi T1, M0
+ andi T2, M1
+ andi T3, M2
+ eor Z0, T0
+ eor Z1, T1
+ eor Z2, T2
+ eor Z3, T3
+ ret
+
+seed_sbox1:
+.byte 169, 133, 214, 211, 84, 29, 172, 37
+.byte 93, 67, 24, 30, 81, 252, 202, 99
+.byte 40, 68, 32, 157, 224, 226, 200, 23
+.byte 165, 143, 3, 123, 187, 19, 210, 238
+.byte 112, 140, 63, 168, 50, 221, 246, 116
+.byte 236, 149, 11, 87, 92, 91, 189, 1
+.byte 36, 28, 115, 152, 16, 204, 242, 217
+.byte 44, 231, 114, 131, 155, 209, 134, 201
+.byte 96, 80, 163, 235, 13, 182, 158, 79
+.byte 183, 90, 198, 120, 166, 18, 175, 213
+.byte 97, 195, 180, 65, 82, 125, 141, 8
+.byte 31, 153, 0, 25, 4, 83, 247, 225
+.byte 253, 118, 47, 39, 176, 139, 14, 171
+.byte 162, 110, 147, 77, 105, 124, 9, 10
+.byte 191, 239, 243, 197, 135, 20, 254, 100
+.byte 222, 46, 75, 26, 6, 33, 107, 102
+.byte 2, 245, 146, 138, 12, 179, 126, 208
+.byte 122, 71, 150, 229, 38, 128, 173, 223
+.byte 161, 48, 55, 174, 54, 21, 34, 56
+.byte 244, 167, 69, 76, 129, 233, 132, 151
+.byte 53, 203, 206, 60, 113, 17, 199, 137
+.byte 117, 251, 218, 248, 148, 89, 130, 196
+.byte 255, 73, 57, 103, 192, 207, 215, 184
+.byte 15, 142, 66, 35, 145, 108, 219, 164
+.byte 52, 241, 72, 194, 111, 61, 45, 64
+.byte 190, 62, 188, 193, 170, 186, 78, 85
+.byte 59, 220, 104, 127, 156, 216, 74, 86
+.byte 119, 160, 237, 70, 181, 43, 101, 250
+.byte 227, 185, 177, 159, 94, 249, 230, 178
+.byte 49, 234, 109, 95, 228, 240, 205, 136
+.byte 22, 58, 88, 212, 98, 41, 7, 51
+.byte 232, 27, 5, 121, 144, 106, 42, 154
+seed_sbox2:
+.byte 56, 232, 45, 166, 207, 222, 179, 184
+.byte 175, 96, 85, 199, 68, 111, 107, 91
+.byte 195, 98, 51, 181, 41, 160, 226, 167
+.byte 211, 145, 17, 6, 28, 188, 54, 75
+.byte 239, 136, 108, 168, 23, 196, 22, 244
+.byte 194, 69, 225, 214, 63, 61, 142, 152
+.byte 40, 78, 246, 62, 165, 249, 13, 223
+.byte 216, 43, 102, 122, 39, 47, 241, 114
+.byte 66, 212, 65, 192, 115, 103, 172, 139
+.byte 247, 173, 128, 31, 202, 44, 170, 52
+.byte 210, 11, 238, 233, 93, 148, 24, 248
+.byte 87, 174, 8, 197, 19, 205, 134, 185
+.byte 255, 125, 193, 49, 245, 138, 106, 177
+.byte 209, 32, 215, 2, 34, 4, 104, 113
+.byte 7, 219, 157, 153, 97, 190, 230, 89
+.byte 221, 81, 144, 220, 154, 163, 171, 208
+.byte 129, 15, 71, 26, 227, 236, 141, 191
+.byte 150, 123, 92, 162, 161, 99, 35, 77
+.byte 200, 158, 156, 58, 12, 46, 186, 110
+.byte 159, 90, 242, 146, 243, 73, 120, 204
+.byte 21, 251, 112, 117, 127, 53, 16, 3
+.byte 100, 109, 198, 116, 213, 180, 234, 9
+.byte 118, 25, 254, 64, 18, 224, 189, 5
+.byte 250, 1, 240, 42, 94, 169, 86, 67
+.byte 133, 20, 137, 155, 176, 229, 72, 121
+.byte 151, 252, 30, 130, 33, 140, 27, 95
+.byte 119, 84, 178, 29, 37, 79, 0, 70
+.byte 237, 88, 82, 235, 126, 218, 201, 253
+.byte 48, 149, 101, 60, 182, 228, 187, 124
+.byte 14, 80, 57, 38, 50, 132, 105, 147
+.byte 55, 231, 36, 164, 203, 83, 10, 135
+.byte 217, 76, 131, 143, 206, 59, 74, 183
projects / avr-crypto-lib.git / blobdiff