/** * Re-key the cipher. * <p> * @param key the key to be used */ private void setKey( byte[] key) { int i, j; for (i = j = 0; i < 4; i++,j+=4) { _S[i] = bytesToInt(key, j); } for (i = j = 0; i < rounds; i++) { _sum0[i] = (j + _S[j & 3]); j += delta; _sum1[i] = (j + _S[j >>> 11 & 3]); } }
/** * Re-key the cipher. * <p> * @param key the key to be used */ private void setKey( byte[] key) { if (key.length != 16) { throw new IllegalArgumentException("Key size must be 128 bits."); } int i, j; for (i = j = 0; i < 4; i++,j+=4) { _S[i] = bytesToInt(key, j); } for (i = j = 0; i < rounds; i++) { _sum0[i] = (j + _S[j & 3]); j += delta; _sum1[i] = (j + _S[j >>> 11 & 3]); } }
private int decryptBlock( byte[] in, int inOff, byte[] out, int outOff) { // Pack bytes into integers int v0 = bytesToInt(in, inOff); int v1 = bytesToInt(in, inOff + 4); for (int i = rounds-1; i >= 0; i--) { v1 -= ((v0 << 4 ^ v0 >>> 5) + v0) ^ _sum1[i]; v0 -= ((v1 << 4 ^ v1 >>> 5) + v1) ^ _sum0[i]; } unpackInt(v0, out, outOff); unpackInt(v1, out, outOff + 4); return block_size; }
private int encryptBlock( byte[] in, int inOff, byte[] out, int outOff) { // Pack bytes into integers int v0 = bytesToInt(in, inOff); int v1 = bytesToInt(in, inOff + 4); for (int i = 0; i < rounds; i++) { v0 += ((v1 << 4 ^ v1 >>> 5) + v1) ^ _sum0[i]; v1 += ((v0 << 4 ^ v0 >>> 5) + v0) ^ _sum1[i]; } unpackInt(v0, out, outOff); unpackInt(v1, out, outOff + 4); return block_size; }
private int encryptBlock( byte[] in, int inOff, byte[] out, int outOff) { // Pack bytes into integers int v0 = bytesToInt(in, inOff); int v1 = bytesToInt(in, inOff + 4); for (int i = 0; i < rounds; i++) { v0 += ((v1 << 4 ^ v1 >>> 5) + v1) ^ _sum0[i]; v1 += ((v0 << 4 ^ v0 >>> 5) + v0) ^ _sum1[i]; } unpackInt(v0, out, outOff); unpackInt(v1, out, outOff + 4); return block_size; }
private int decryptBlock( byte[] in, int inOff, byte[] out, int outOff) { // Pack bytes into integers int v0 = bytesToInt(in, inOff); int v1 = bytesToInt(in, inOff + 4); for (int i = rounds-1; i >= 0; i--) { v1 -= ((v0 << 4 ^ v0 >>> 5) + v0) ^ _sum1[i]; v0 -= ((v1 << 4 ^ v1 >>> 5) + v1) ^ _sum0[i]; } unpackInt(v0, out, outOff); unpackInt(v1, out, outOff + 4); return block_size; }