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* disabled code which manipulates unaligned words on platforms for which this is a problem.
#include "ecrypt-sync.h"
#include "table.h"
#if (defined(__alpha) || defined(__sparc) || defined(__hppa))
#error this code manipulates unaligned words
#endif
void ECRYPT_init(void)
{
;
}
void ECRYPT_keysetup(ECRYPT_ctx *c,const u8 *k,u32 keysize,u32 ivsize)
{
register u32 x0;
register u32 x1;
register u32 x2;
register u32 x3;
register u32 q0;
register u32 q1;
register u32 q2;
register u32 q3;
register u32 i;
x0 = *(u32 *) (k + 0);
x1 = *(u32 *) (k + 4);
x2 = *(u32 *) (k + 8);
x3 = *(u32 *) (k + 12);
c->key[0] = x0;
c->key[1] = x1;
c->key[2] = x2;
c->key[3] = x3;
for (i = 0;i < 10;++i) {
x0 ^= aes_little_constants[i];
q3 = x3 << 3;
q0 = x3 >> 5;
q1 = x3 >> 13;
q2 = x3 >> 21;
q0 &= 2040;
q1 &= 2040;
q2 &= 2040;
q3 &= 2040;
q0 = *(u32 *) (table2 + q0);
q1 = *(u32 *) (table3 + q1);
q2 = *(u32 *) (table0 + q2);
q3 = *(u32 *) (table1 + q3);
q0 &= 0x000000ff;
q1 &= 0x0000ff00;
q2 &= 0x00ff0000;
q3 &= 0xff000000;
x0 ^= q0;
x0 ^= q1;
x0 ^= q2;
x0 ^= q3;
x1 ^= x0;
x2 ^= x1;
x3 ^= x2;
c->key[i + 4] = x0;
}
}
void ECRYPT_ivsetup(ECRYPT_ctx *c,const u8 *iv)
{
c->ctr[0] = *(u32 *) (iv);
c->ctr[1] = *(u32 *) (iv + 4);
c->ctr[2] = *(u32 *) (iv + 8);
c->ctr[3] = *(u32 *) (iv + 12);
}
void ECRYPT_process_bytes(int action,ECRYPT_ctx *c,const u8 *input,u8 *output,u32 len)
{
u32 x[44];
u32 n[4];
u8 tmp[16];
register u32 x0;
register u32 x1;
register u32 x2;
register u32 x3;
register u32 i;
register u32 y0;
register u32 y1;
register u32 y2;
register u32 y3;
register u32 z0;
register u32 z1;
register u32 z2;
register u32 z3;
register u32 p00;
register u32 p01;
register u32 p02;
register u32 p03;
register u32 p10;
register u32 p11;
register u32 p12;
register u32 p13;
register u32 p20;
register u32 p21;
register u32 p22;
register u32 p23;
register u32 p30;
register u32 p31;
register u32 p32;
register u32 p33;
x0 = c->key[0];
x1 = c->key[1];
x2 = c->key[2];
x3 = c->key[3];
x[0] = x0;
x[1] = x1;
x[2] = x2;
x[3] = x3;
for (i = 0;i < 10;++i) {
x0 = c->key[i + 4];
x1 ^= x0;
x2 ^= x1;
x3 ^= x2;
x[i * 4 + 4] = x0;
x[i * 4 + 5] = x1;
x[i * 4 + 6] = x2;
x[i * 4 + 7] = x3;
}
n[0] = c->ctr[0];
n[1] = c->ctr[1];
n[2] = c->ctr[2];
n[3] = c->ctr[3];
while (len > 0) {
y0 = n[0];
y1 = n[1];
y2 = n[2];
y3 = n[3];
n[0] = y0 + 1;
y0 ^= x[0];
y1 ^= x[1];
y2 ^= x[2];
y3 ^= x[3];
for (i = 1;i < 10;++i) {
z0 = x[i * 4 + 0];
z1 = x[i * 4 + 1];
z2 = x[i * 4 + 2];
z3 = x[i * 4 + 3];
p00 = y0 << 3;
p01 = y0 >> 5;
p02 = y0 >> 13;
p03 = y0 >> 21;
p00 &= 2040;
p01 &= 2040;
p02 &= 2040;
p03 &= 2040;
p00 = *(u32 *) (table0 + p00);
p01 = *(u32 *) (table1 + p01);
p02 = *(u32 *) (table2 + p02);
p03 = *(u32 *) (table3 + p03);
z0 ^= p00;
z3 ^= p01;
z2 ^= p02;
z1 ^= p03;
p10 = y1 << 3;
p11 = y1 >> 5;
p12 = y1 >> 13;
p13 = y1 >> 21;
p10 &= 2040;
p11 &= 2040;
p12 &= 2040;
p13 &= 2040;
p10 = *(u32 *) (table0 + p10);
p11 = *(u32 *) (table1 + p11);
p12 = *(u32 *) (table2 + p12);
p13 = *(u32 *) (table3 + p13);
z1 ^= p10;
z0 ^= p11;
z3 ^= p12;
z2 ^= p13;
p20 = y2 << 3;
p21 = y2 >> 5;
p22 = y2 >> 13;
p23 = y2 >> 21;
p20 &= 2040;
p21 &= 2040;
p22 &= 2040;
p23 &= 2040;
p20 = *(u32 *) (table0 + p20);
p21 = *(u32 *) (table1 + p21);
p22 = *(u32 *) (table2 + p22);
p23 = *(u32 *) (table3 + p23);
z2 ^= p20;
z1 ^= p21;
z0 ^= p22;
z3 ^= p23;
p30 = y3 << 3;
p31 = y3 >> 5;
p32 = y3 >> 13;
p33 = y3 >> 21;
p31 &= 2040;
p32 &= 2040;
p33 &= 2040;
p30 &= 2040;
p31 = *(u32 *) (table1 + p31);
p32 = *(u32 *) (table2 + p32);
p33 = *(u32 *) (table3 + p33);
p30 = *(u32 *) (table0 + p30);
y2 = z2 ^ p31;
y1 = z1 ^ p32;
y0 = z0 ^ p33;
y3 = z3 ^ p30;
}
z0 = x[i * 4 + 0];
z1 = x[i * 4 + 1];
z2 = x[i * 4 + 2];
z3 = x[i * 4 + 3];
p00 = y0 << 3;
p01 = y0 >> 5;
p02 = y0 >> 13;
p03 = y0 >> 21;
p00 &= 2040;
p01 &= 2040;
p02 &= 2040;
p03 &= 2040;
p00 = *(u32 *) (table2 + p00);
p01 = *(u32 *) (table3 + p01);
p02 = *(u32 *) (table0 + p02);
p03 = *(u32 *) (table1 + p03);
p00 &= 0x000000ff;
p01 &= 0x0000ff00;
p02 &= 0x00ff0000;
p03 &= 0xff000000;
z0 ^= p00;
z3 ^= p01;
z2 ^= p02;
z1 ^= p03;
p10 = y1 << 3;
p11 = y1 >> 5;
p12 = y1 >> 13;
p13 = y1 >> 21;
p10 &= 2040;
p11 &= 2040;
p12 &= 2040;
p13 &= 2040;
p10 = *(u32 *) (table2 + p10);
p11 = *(u32 *) (table3 + p11);
p12 = *(u32 *) (table0 + p12);
p13 = *(u32 *) (table1 + p13);
p10 &= 0x000000ff;
p11 &= 0x0000ff00;
p12 &= 0x00ff0000;
p13 &= 0xff000000;
z1 ^= p10;
z0 ^= p11;
z3 ^= p12;
z2 ^= p13;
p20 = y2 << 3;
p21 = y2 >> 5;
p22 = y2 >> 13;
p23 = y2 >> 21;
p20 &= 2040;
p21 &= 2040;
p22 &= 2040;
p23 &= 2040;
p20 = *(u32 *) (table2 + p20);
p21 = *(u32 *) (table3 + p21);
p22 = *(u32 *) (table0 + p22);
p23 = *(u32 *) (table1 + p23);
p20 &= 0x000000ff;
p21 &= 0x0000ff00;
p22 &= 0x00ff0000;
p23 &= 0xff000000;
z2 ^= p20;
z1 ^= p21;
z0 ^= p22;
z3 ^= p23;
p30 = y3 << 3;
p31 = y3 >> 5;
p32 = y3 >> 13;
p33 = y3 >> 21;
p31 &= 2040;
p32 &= 2040;
p33 &= 2040;
p30 &= 2040;
p30 = *(u32 *) (table2 + p30);
p31 = *(u32 *) (table3 + p31);
p32 = *(u32 *) (table0 + p32);
p33 = *(u32 *) (table1 + p33);
p30 &= 0x000000ff;
p31 &= 0x0000ff00;
p32 &= 0x00ff0000;
p33 &= 0xff000000;
y3 = z3 ^ p30;
y2 = z2 ^ p31;
y1 = z1 ^ p32;
y0 = z0 ^ p33;
if (len < 16) {
*(u32 *) (tmp + 0) = y0;
*(u32 *) (tmp + 4) = y1;
*(u32 *) (tmp + 8) = y2;
*(u32 *) (tmp + 12) = y3;
for (i = 0;i < len;++i) output[i] = input[i] ^ tmp[i];
break;
}
y0 ^= *(u32 *) (input + 0);
y1 ^= *(u32 *) (input + 4);
y2 ^= *(u32 *) (input + 8);
y3 ^= *(u32 *) (input + 12);
*(u32 *) (output + 0) = y0;
*(u32 *) (output + 4) = y1;
*(u32 *) (output + 8) = y2;
*(u32 *) (output + 12) = y3;
len -= 16;
input += 16;
output += 16;
}
c->ctr[0] = n[0];
c->ctr[1] = n[1];
c->ctr[2] = n[2];
c->ctr[3] = n[3];
}
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