// ------------------------------------------------
public final void diversify(byte[] MxK, byte[] factor, byte[] DxK) {
Util.arrayCopyNonAtomic(factor, (short) 0, tbuf2, (short) 0, (short) 8);
tripledes(MxK, tbuf2, (short) 0, (short) 8, tbuf1, (short) 0, Cipher.MODE_ENCRYPT);
Util.arrayCopy(tbuf1, (short) 0, DxK, (short) 0, (short) 8);
notblock8(tbuf2);
tripledes(MxK, tbuf2, (short) 0, (short) 8, tbuf1, (short) 0, Cipher.MODE_ENCRYPT);
Util.arrayCopyNonAtomic(tbuf1, (short) 0, DxK, (short) 8, (short) 8);
}
// ------------------------------------------------
public final void gmac4(byte alg, byte[] key, byte[] data, short dl, byte[] mac) {
dl = pbocpadding(data, dl);
Util.arrayFillNonAtomic(tbuf1, (short) 0, (short) 8, (byte) 0);
for (short i = (short) 0; i < dl; i += (short) 8) {
xorblock8(tbuf1, data, i);
cdes(key, (short) 0, tbuf1, (short) 0, (short) 8, tbuf2, (short) 0, Cipher.MODE_ENCRYPT);
Util.arrayCopyNonAtomic(tbuf2, (short) 0, tbuf1, (short) 0, (short) 8);
}
if (alg == ALG_3DES) {
cdes(key, (short) 8, tbuf1, (short) 0, (short) 8, tbuf2, (short) 0, Cipher.MODE_DECRYPT);
cdes(key, (short) 0, tbuf2, (short) 0, (short) 8, tbuf1, (short) 0, Cipher.MODE_ENCRYPT);
}
Util.arrayCopyNonAtomic(tbuf1, (short) 0, mac, (short) 0, (short) 4);
}
// ------------------------------------------------
public final short PBDecrypt(
byte alg, byte[] key, byte[] data, short doff, short len, byte[] res) {
if (alg == ALG_3DES) tripledes(key, data, doff, len, res, (short) 0, Cipher.MODE_DECRYPT);
else cdes(key, (short) 0, data, doff, len, res, (short) 0, Cipher.MODE_DECRYPT);
len = res[0];
Util.arrayCopyNonAtomic(res, (short) 1, res, (short) 0, len);
return len;
}
// ------------------------------------------------
public final short pbocpadding(byte[] data, short len) {
short f;
data[len] = (byte) 0x80;
len++;
f = (short) (len % 8);
f = (short) (8 - f);
if (f != (short) 8) Util.arrayFillNonAtomic(data, len, f, (byte) 0);
else f = (short) 0;
return (short) (len + f);
}
// ------------------------------------------------
public final short PBEncrypt(byte alg, byte[] key, byte[] data, short len, byte[] res) {
Util.arrayCopyNonAtomic(data, (short) 0, res, (short) 1, len);
res[0] = (byte) len;
if (((short) (len + 1) % (short) 8) > (short) 0) len = pbocpadding(res, (short) (len + 1));
else len = (short) (len + 1);
if (alg == ALG_3DES) {
tripledes(key, data, (short) 0, len, res, (short) 0, Cipher.MODE_ENCRYPT);
} else {
cdes(key, (short) 0, data, (short) 0, len, res, (short) 0, Cipher.MODE_ENCRYPT);
}
return len;
}
