private static void rijndaelDecrypt(
byte[] in, int inOffset, byte[] out, int outOffset, Object sessionKey, int bs) {
Object[] sKey = (Object[]) sessionKey; // extract decryption round keys
int[][] Kd = (int[][]) sKey[1];
int BC = bs / 4;
int ROUNDS = Kd.length - 1;
int SC = BC == 4 ? 0 : (BC == 6 ? 1 : 2);
int s1 = shifts[SC][1][1];
int s2 = shifts[SC][2][1];
int s3 = shifts[SC][3][1];
int[] a = new int[BC];
int[] t = new int[BC]; // temporary work array
int i, tt;
for (i = 0; i < BC; i++) // ciphertext to ints + key
t[i] =
(in[inOffset++] << 24
| (in[inOffset++] & 0xFF) << 16
| (in[inOffset++] & 0xFF) << 8
| (in[inOffset++] & 0xFF))
^ Kd[0][i];
for (int r = 1; r < ROUNDS; r++) // apply round transforms
{
for (i = 0; i < BC; i++)
a[i] =
(T5[(t[i] >>> 24)]
^ T6[(t[(i + s1) % BC] >>> 16) & 0xFF]
^ T7[(t[(i + s2) % BC] >>> 8) & 0xFF]
^ T8[t[(i + s3) % BC] & 0xFF])
^ Kd[r][i];
System.arraycopy(a, 0, t, 0, BC);
if (Configuration.DEBUG) log.fine("PT" + r + "=" + Util.toString(t));
}
for (i = 0; i < BC; i++) // last round is special
{
tt = Kd[ROUNDS][i];
out[outOffset++] = (byte) (Si[(t[i] >>> 24)] ^ (tt >>> 24));
out[outOffset++] = (byte) (Si[(t[(i + s1) % BC] >>> 16) & 0xFF] ^ (tt >>> 16));
out[outOffset++] = (byte) (Si[(t[(i + s2) % BC] >>> 8) & 0xFF] ^ (tt >>> 8));
out[outOffset++] = (byte) (Si[t[(i + s3) % BC] & 0xFF] ^ tt);
}
if (Configuration.DEBUG) log.fine("PT=" + Util.toString(out, outOffset - bs, bs));
}
private static void aesDecrypt(byte[] in, int i, byte[] out, int j, Object key) {
int[][] Kd = (int[][]) ((Object[]) key)[1]; // extract decryption round keys
int ROUNDS = Kd.length - 1;
int[] Kdr = Kd[0];
// ciphertext to ints + key
int t0 =
(in[i++] << 24 | (in[i++] & 0xFF) << 16 | (in[i++] & 0xFF) << 8 | (in[i++] & 0xFF))
^ Kdr[0];
int t1 =
(in[i++] << 24 | (in[i++] & 0xFF) << 16 | (in[i++] & 0xFF) << 8 | (in[i++] & 0xFF))
^ Kdr[1];
int t2 =
(in[i++] << 24 | (in[i++] & 0xFF) << 16 | (in[i++] & 0xFF) << 8 | (in[i++] & 0xFF))
^ Kdr[2];
int t3 =
(in[i++] << 24 | (in[i++] & 0xFF) << 16 | (in[i++] & 0xFF) << 8 | (in[i++] & 0xFF))
^ Kdr[3];
int a0, a1, a2, a3;
for (int r = 1; r < ROUNDS; r++) // apply round transforms
{
Kdr = Kd[r];
a0 =
(T5[(t0 >>> 24)] ^ T6[(t3 >>> 16) & 0xFF] ^ T7[(t2 >>> 8) & 0xFF] ^ T8[t1 & 0xFF])
^ Kdr[0];
a1 =
(T5[(t1 >>> 24)] ^ T6[(t0 >>> 16) & 0xFF] ^ T7[(t3 >>> 8) & 0xFF] ^ T8[t2 & 0xFF])
^ Kdr[1];
a2 =
(T5[(t2 >>> 24)] ^ T6[(t1 >>> 16) & 0xFF] ^ T7[(t0 >>> 8) & 0xFF] ^ T8[t3 & 0xFF])
^ Kdr[2];
a3 =
(T5[(t3 >>> 24)] ^ T6[(t2 >>> 16) & 0xFF] ^ T7[(t1 >>> 8) & 0xFF] ^ T8[t0 & 0xFF])
^ Kdr[3];
t0 = a0;
t1 = a1;
t2 = a2;
t3 = a3;
if (Configuration.DEBUG)
log.fine(
"PT"
+ r
+ "="
+ Util.toString(t0)
+ Util.toString(t1)
+ Util.toString(t2)
+ Util.toString(t3));
}
// last round is special
Kdr = Kd[ROUNDS];
int tt = Kdr[0];
out[j++] = (byte) (Si[(t0 >>> 24)] ^ (tt >>> 24));
out[j++] = (byte) (Si[(t3 >>> 16) & 0xFF] ^ (tt >>> 16));
out[j++] = (byte) (Si[(t2 >>> 8) & 0xFF] ^ (tt >>> 8));
out[j++] = (byte) (Si[t1 & 0xFF] ^ tt);
tt = Kdr[1];
out[j++] = (byte) (Si[(t1 >>> 24)] ^ (tt >>> 24));
out[j++] = (byte) (Si[(t0 >>> 16) & 0xFF] ^ (tt >>> 16));
out[j++] = (byte) (Si[(t3 >>> 8) & 0xFF] ^ (tt >>> 8));
out[j++] = (byte) (Si[t2 & 0xFF] ^ tt);
tt = Kdr[2];
out[j++] = (byte) (Si[(t2 >>> 24)] ^ (tt >>> 24));
out[j++] = (byte) (Si[(t1 >>> 16) & 0xFF] ^ (tt >>> 16));
out[j++] = (byte) (Si[(t0 >>> 8) & 0xFF] ^ (tt >>> 8));
out[j++] = (byte) (Si[t3 & 0xFF] ^ tt);
tt = Kdr[3];
out[j++] = (byte) (Si[(t3 >>> 24)] ^ (tt >>> 24));
out[j++] = (byte) (Si[(t2 >>> 16) & 0xFF] ^ (tt >>> 16));
out[j++] = (byte) (Si[(t1 >>> 8) & 0xFF] ^ (tt >>> 8));
out[j++] = (byte) (Si[t0 & 0xFF] ^ tt);
if (Configuration.DEBUG) log.fine("PT=" + Util.toString(out, j - 16, 16));
}
static {
long time = System.currentTimeMillis();
int ROOT = 0x11B;
int i, j = 0;
// S-box, inverse S-box, T-boxes, U-boxes
int s, s2, s3, i2, i4, i8, i9, ib, id, ie, t;
char c;
for (i = 0; i < 256; i++) {
c = SS.charAt(i >>> 1);
S[i] = (byte) (((i & 1) == 0) ? c >>> 8 : c & 0xFF);
s = S[i] & 0xFF;
Si[s] = (byte) i;
s2 = s << 1;
if (s2 >= 0x100) s2 ^= ROOT;
s3 = s2 ^ s;
i2 = i << 1;
if (i2 >= 0x100) i2 ^= ROOT;
i4 = i2 << 1;
if (i4 >= 0x100) i4 ^= ROOT;
i8 = i4 << 1;
if (i8 >= 0x100) i8 ^= ROOT;
i9 = i8 ^ i;
ib = i9 ^ i2;
id = i9 ^ i4;
ie = i8 ^ i4 ^ i2;
T1[i] = t = (s2 << 24) | (s << 16) | (s << 8) | s3;
T2[i] = (t >>> 8) | (t << 24);
T3[i] = (t >>> 16) | (t << 16);
T4[i] = (t >>> 24) | (t << 8);
T5[s] = U1[i] = t = (ie << 24) | (i9 << 16) | (id << 8) | ib;
T6[s] = U2[i] = (t >>> 8) | (t << 24);
T7[s] = U3[i] = (t >>> 16) | (t << 16);
T8[s] = U4[i] = (t >>> 24) | (t << 8);
}
// round constants
int r = 1;
rcon[0] = 1;
for (i = 1; i < 30; i++) {
r <<= 1;
if (r >= 0x100) r ^= ROOT;
rcon[i] = (byte) r;
}
time = System.currentTimeMillis() - time;
if (Configuration.DEBUG) {
log.fine("Static Data");
log.fine("S[]:");
StringBuilder sb;
for (i = 0; i < 16; i++) {
sb = new StringBuilder();
for (j = 0; j < 16; j++) sb.append("0x").append(Util.toString(S[i * 16 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("Si[]:");
for (i = 0; i < 16; i++) {
sb = new StringBuilder();
for (j = 0; j < 16; j++) sb.append("0x").append(Util.toString(Si[i * 16 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("T1[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(T1[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("T2[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(T2[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("T3[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(T3[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("T4[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(T4[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("T5[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(T5[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("T6[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(T6[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("T7[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(T7[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("T8[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(T8[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("U1[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(U1[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("U2[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(U2[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("U3[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(U3[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("U4[]:");
for (i = 0; i < 64; i++) {
sb = new StringBuilder();
for (j = 0; j < 4; j++) sb.append("0x").append(Util.toString(U4[i * 4 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("rcon[]:");
for (i = 0; i < 5; i++) {
sb = new StringBuilder();
for (j = 0; j < 6; j++) sb.append("0x").append(Util.toString(rcon[i * 6 + j])).append(", ");
log.fine(sb.toString());
}
log.fine("Total initialization time: " + time + " ms.");
}
}