10 #include <botan/square.h>
11 #include <botan/loadstor.h>
12 #include <botan/rotate.h>
21 for(
size_t i = 0; i != blocks; ++i)
25 B0 = TE0[in[ 0] ^ ME[ 0]] ^ TE1[in[ 4] ^ ME[ 4]] ^
26 TE2[in[ 8] ^ ME[ 8]] ^ TE3[in[12] ^ ME[12]] ^ EK[0];
27 B1 = TE0[in[ 1] ^ ME[ 1]] ^ TE1[in[ 5] ^ ME[ 5]] ^
28 TE2[in[ 9] ^ ME[ 9]] ^ TE3[in[13] ^ ME[13]] ^ EK[1];
29 B2 = TE0[in[ 2] ^ ME[ 2]] ^ TE1[in[ 6] ^ ME[ 6]] ^
30 TE2[in[10] ^ ME[10]] ^ TE3[in[14] ^ ME[14]] ^ EK[2];
31 B3 = TE0[in[ 3] ^ ME[ 3]] ^ TE1[in[ 7] ^ ME[ 7]] ^
32 TE2[in[11] ^ ME[11]] ^ TE3[in[15] ^ ME[15]] ^ EK[3];
34 for(
size_t j = 1; j != 7; j += 2)
56 out[ 0] = SE[
get_byte(0, B0)] ^ ME[16];
57 out[ 1] = SE[
get_byte(0, B1)] ^ ME[17];
58 out[ 2] = SE[
get_byte(0, B2)] ^ ME[18];
59 out[ 3] = SE[
get_byte(0, B3)] ^ ME[19];
60 out[ 4] = SE[
get_byte(1, B0)] ^ ME[20];
61 out[ 5] = SE[
get_byte(1, B1)] ^ ME[21];
62 out[ 6] = SE[
get_byte(1, B2)] ^ ME[22];
63 out[ 7] = SE[
get_byte(1, B3)] ^ ME[23];
64 out[ 8] = SE[
get_byte(2, B0)] ^ ME[24];
65 out[ 9] = SE[
get_byte(2, B1)] ^ ME[25];
66 out[10] = SE[
get_byte(2, B2)] ^ ME[26];
67 out[11] = SE[
get_byte(2, B3)] ^ ME[27];
68 out[12] = SE[
get_byte(3, B0)] ^ ME[28];
69 out[13] = SE[
get_byte(3, B1)] ^ ME[29];
70 out[14] = SE[
get_byte(3, B2)] ^ ME[30];
71 out[15] = SE[
get_byte(3, B3)] ^ ME[31];
83 for(
size_t i = 0; i != blocks; ++i)
87 B0 = TD0[in[ 0] ^ MD[ 0]] ^ TD1[in[ 4] ^ MD[ 4]] ^
88 TD2[in[ 8] ^ MD[ 8]] ^ TD3[in[12] ^ MD[12]] ^ DK[0];
89 B1 = TD0[in[ 1] ^ MD[ 1]] ^ TD1[in[ 5] ^ MD[ 5]] ^
90 TD2[in[ 9] ^ MD[ 9]] ^ TD3[in[13] ^ MD[13]] ^ DK[1];
91 B2 = TD0[in[ 2] ^ MD[ 2]] ^ TD1[in[ 6] ^ MD[ 6]] ^
92 TD2[in[10] ^ MD[10]] ^ TD3[in[14] ^ MD[14]] ^ DK[2];
93 B3 = TD0[in[ 3] ^ MD[ 3]] ^ TD1[in[ 7] ^ MD[ 7]] ^
94 TD2[in[11] ^ MD[11]] ^ TD3[in[15] ^ MD[15]] ^ DK[3];
96 for(
size_t j = 1; j != 7; j += 2)
118 out[ 0] = SD[
get_byte(0, B0)] ^ MD[16];
119 out[ 1] = SD[
get_byte(0, B1)] ^ MD[17];
120 out[ 2] = SD[
get_byte(0, B2)] ^ MD[18];
121 out[ 3] = SD[
get_byte(0, B3)] ^ MD[19];
122 out[ 4] = SD[
get_byte(1, B0)] ^ MD[20];
123 out[ 5] = SD[
get_byte(1, B1)] ^ MD[21];
124 out[ 6] = SD[
get_byte(1, B2)] ^ MD[22];
125 out[ 7] = SD[
get_byte(1, B3)] ^ MD[23];
126 out[ 8] = SD[
get_byte(2, B0)] ^ MD[24];
127 out[ 9] = SD[
get_byte(2, B1)] ^ MD[25];
128 out[10] = SD[
get_byte(2, B2)] ^ MD[26];
129 out[11] = SD[
get_byte(2, B3)] ^ MD[27];
130 out[12] = SD[
get_byte(3, B0)] ^ MD[28];
131 out[13] = SD[
get_byte(3, B1)] ^ MD[29];
132 out[14] = SD[
get_byte(3, B2)] ^ MD[30];
133 out[15] = SD[
get_byte(3, B3)] ^ MD[31];
143 void Square::key_schedule(
const byte key[],
size_t)
147 for(
size_t i = 0; i != 4; ++i)
150 for(
size_t i = 0; i != 8; ++i)
152 XEK[4*i+4] = XEK[4*i ] ^
rotate_left(XEK[4*i+3], 8) ^ (0x01000000 << i);
153 XEK[4*i+5] = XEK[4*i+1] ^ XEK[4*i+4];
154 XEK[4*i+6] = XEK[4*i+2] ^ XEK[4*i+5];
155 XEK[4*i+7] = XEK[4*i+3] ^ XEK[4*i+6];
157 for(
size_t j = 0; j != 4; ++j)
158 XDK[28 - 4*i + j] = XEK[4*(i+1)+j];
160 transform(&XEK[4*i]);
163 for(
size_t i = 0; i != 4; ++i)
164 for(
size_t j = 0; j != 4; ++j)
167 ME[4*i+j+16] =
get_byte(j, XEK[i+32]);
169 MD[4*i+j+16] =
get_byte(j, XEK[i ]);
172 EK.
copy(&XEK[4], 28);
173 DK.
copy(&XDK[4], 28);
179 void Square::transform(
u32bit round_key[4])
181 static const byte G[4][4] = {
187 for(
size_t i = 0; i != 4; ++i)
189 byte A[4] = { 0 }, B[4] = { 0 };
193 for(
size_t j = 0; j != 4; ++j)
194 for(
size_t k = 0; k != 4; ++k)
197 const byte b = G[k][j];
200 B[j] ^= ALog[(Log[a] + Log[b]) % 255];
void encrypt_n(const byte in[], byte out[], size_t blocks) const
T rotate_left(T input, size_t rot)
byte get_byte(size_t byte_num, T input)
void copy(const T in[], size_t n)
u32bit load_be< u32bit >(const byte in[], size_t off)
void decrypt_n(const byte in[], byte out[], size_t blocks) const
void store_be(u16bit in, byte out[2])
void zeroise(MemoryRegion< T > &vec)