void fp6_read_bin(fp6_t a, uint8_t *bin, int len) {
if (len != 6 * FP_BYTES) {
THROW(ERR_NO_BUFFER);
}
fp2_read_bin(a[0], bin, 2 * FP_BYTES);
fp2_read_bin(a[1], bin + 2 * FP_BYTES, 2 * FP_BYTES);
fp2_read_bin(a[2], bin + 4 * FP_BYTES, 2 * FP_BYTES);
}
void ep2_read_bin(ep2_t a, uint8_t *bin, int len) {
if (len == 1) {
if (bin[0] == 0) {
ep2_set_infty(a);
return;
} else {
THROW(ERR_NO_BUFFER);
return;
}
}
if (len != (2 * FP_BYTES + 1) && len != (4 * FP_BYTES + 1)) {
THROW(ERR_NO_BUFFER);
return;
}
a->norm = 1;
fp_set_dig(a->z[0], 1);
fp_zero(a->z[1]);
fp2_read_bin(a->x, bin + 1, 2 * FP_BYTES);
if (len == 2 * FP_BYTES + 1) {
switch(bin[0]) {
case 2:
fp2_zero(a->y);
break;
case 3:
fp2_zero(a->y);
fp_set_bit(a->y[0], 0, 1);
fp_zero(a->y[1]);
break;
default:
THROW(ERR_NO_VALID);
break;
}
ep2_upk(a, a);
}
if (len == 4 * FP_BYTES + 1) {
if (bin[0] == 4) {
fp2_read_bin(a->y, bin + 2 * FP_BYTES + 1, 2 * FP_BYTES);
} else {
THROW(ERR_NO_VALID);
}
}
}
void fp12_read_bin(fp12_t a, uint8_t *bin, int len) {
if (len != 8 * FP_BYTES && len != 12 * FP_BYTES) {
THROW(ERR_NO_BUFFER);
}
if (len == 8 * FP_BYTES) {
fp2_zero(a[0][0]);
fp2_read_bin(a[0][1], bin, 2 * FP_BYTES);
fp2_read_bin(a[0][2], bin + 2 * FP_BYTES, 2 * FP_BYTES);
fp2_read_bin(a[1][0], bin + 4 * FP_BYTES, 2 * FP_BYTES);
fp2_zero(a[1][1]);
fp2_read_bin(a[1][2], bin + 6 * FP_BYTES, 2 * FP_BYTES);
fp12_back_cyc(a, a);
}
if (len == 12 * FP_BYTES) {
fp6_read_bin(a[0], bin, 6 * FP_BYTES);
fp6_read_bin(a[1], bin + 6 * FP_BYTES, 6 * FP_BYTES);
}
}
