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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4.
package org.bouncycastle.pqc.crypto.qtesla;
import java.security.SecureRandom;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Pack;
class QTesla3p
{
private static final int PARAM_N = 2048;
private static final double PARAM_SIGMA = 8.5;
private static final int PARAM_Q = 856145921;
private static final int PARAM_Q_LOG = 30;
private static final long PARAM_QINV = 587710463;
private static final long PARAM_BARR_MULT = 5;
private static final int PARAM_BARR_DIV = 32;
private static final int PARAM_B = 2097151;
private static final int PARAM_B_BITS = 21;
private static final int PARAM_S_BITS = 8;
private static final int PARAM_K = 5;
private static final double PARAM_SIGMA_E = PARAM_SIGMA;
private static final int PARAM_H = 40;
private static final int PARAM_D = 24;
private static final int PARAM_GEN_A = 180;
private static final int PARAM_KEYGEN_BOUND_E = 901;
private static final int PARAM_E = PARAM_KEYGEN_BOUND_E;
private static final int PARAM_KEYGEN_BOUND_S = 901;
private static final int PARAM_S = PARAM_KEYGEN_BOUND_S;
private static final int PARAM_R2_INVN = 513161157;
private static final int PARAM_R = 14237691;
private static final int CRYPTO_RANDOMBYTES = 32;
private static final int CRYPTO_SEEDBYTES = 32;
private static final int CRYPTO_C_BYTES = 32;
private static final int HM_BYTES = 64;
private static final int RADIX = 32;
private static final int RADIX32 = 32;
static final int CRYPTO_BYTES = ((PARAM_N * (PARAM_B_BITS + 1) + 7) / 8 + CRYPTO_C_BYTES);
// Contains polynomial s and e, and seeds seed_a and seed_y
static final int CRYPTO_SECRETKEYBYTES = (1 * PARAM_N + 1 * PARAM_N * PARAM_K + 2 * CRYPTO_SEEDBYTES);
// Contains seed_a and polynomials t
static final int CRYPTO_PUBLICKEYBYTES = ((PARAM_Q_LOG * PARAM_N * PARAM_K + 7) / 8 + CRYPTO_SEEDBYTES);
static int generateKeyPair(
byte[] publicKey, byte[] privateKey, SecureRandom secureRandom)
{
/* Initialize Domain Separator for Error Polynomial and Secret Polynomial */
int nonce = 0;
byte[] randomness = new byte[CRYPTO_RANDOMBYTES];
/* Extend Random Bytes to Seed Generation of Error Polynomial and Secret Polynomial */
byte[] randomnessExtended = new byte[(PARAM_K + 3) * CRYPTO_SEEDBYTES];
long[] secretPolynomial = new long[PARAM_N];
long[] errorPolynomial = new long[PARAM_N * PARAM_K];
long[] A = new long[PARAM_N * PARAM_K];
long[] T = new long[PARAM_N * PARAM_K];
long[] s_ntt = new long[PARAM_N];
/* Get randomnessExtended <- seedErrorPolynomial, seedSecretPolynomial, seedA, seedY */
// this.rng.randomByte (randomness, (short) 0, Polynomial.RANDOM);
secureRandom.nextBytes(randomness);
HashUtils.secureHashAlgorithmKECCAK256(randomnessExtended, 0, (PARAM_K + 3) * CRYPTO_SEEDBYTES, randomness, 0, CRYPTO_RANDOMBYTES);
/*
* Sample the Error Polynomial Fulfilling the Criteria
* Choose All Error Polynomial in R with Entries from D_SIGMA
* Repeat Step at Iteration if the h Largest Entries of Error Polynomial Summation to L_E
*/
for (int k = 0; k < PARAM_K; k++)
{
do
{
Gaussian.sample_gauss_poly(++nonce, randomnessExtended, k * CRYPTO_SEEDBYTES, errorPolynomial, k * PARAM_N);
}
while (checkPolynomial(errorPolynomial, k * PARAM_N, PARAM_KEYGEN_BOUND_E));
}
/*
* Sample the Secret Polynomial Fulfilling the Criteria
* Choose Secret Polynomial in R with Entries from D_SIGMA
* Repeat Step if the h Largest Entries of Secret Polynomial Summation to L_S
*/
do
{
Gaussian.sample_gauss_poly(++nonce, randomnessExtended, PARAM_K * CRYPTO_SEEDBYTES, secretPolynomial, 0);
//Sample.polynomialGaussSamplerI(secretPolynomial, 0, randomnessExtended, Polynomial.SEED, ++nonce);
}
while (checkPolynomial(secretPolynomial, 0, PARAM_KEYGEN_BOUND_S));
QTesla3PPolynomial.poly_uniform(A, randomnessExtended, (PARAM_K + 1) * CRYPTO_SEEDBYTES);
QTesla3PPolynomial.poly_ntt(s_ntt, secretPolynomial);
for (int k = 0; k < PARAM_K; k++)
{
QTesla3PPolynomial.poly_mul(T, k * PARAM_N, A, k * PARAM_N, s_ntt);
QTesla3PPolynomial.poly_add_correct(T, k * PARAM_N, T, k * PARAM_N, errorPolynomial, k * PARAM_N);
}
/* Pack Public and Private Keys */
encodePrivateKey(privateKey, secretPolynomial, errorPolynomial, randomnessExtended, (PARAM_K + 1) * CRYPTO_SEEDBYTES);
encodePublicKey(publicKey, T, randomnessExtended, (PARAM_K + 1) * CRYPTO_SEEDBYTES);
return 0;
}
static int generateSignature(
byte[] signature,
final byte[] message, int messageOffset, int messageLength,
final byte[] privateKey, SecureRandom secureRandom)
{
byte[] c = new byte[CRYPTO_C_BYTES];
byte[] randomness = new byte[CRYPTO_SEEDBYTES];
byte[] randomness_input = new byte[CRYPTO_RANDOMBYTES + CRYPTO_SEEDBYTES + HM_BYTES];
int[] pos_list = new int[PARAM_H];
short[] sign_list = new short[PARAM_H];
long[] y = new long[PARAM_N];
long[] y_ntt = new long[PARAM_N];
long[] Sc = new long[PARAM_N];
long[] z = new long[PARAM_N];
long[] v = new long[PARAM_N * PARAM_K];
long[] Ec = new long[PARAM_N * PARAM_K];
long[] a = new long[PARAM_N * PARAM_K];
int k;
int nonce = 0; // Initialize domain separator for sampling y
boolean rsp = false;
// randombytes(randomness_input + CRYPTO_RANDOMBYTES, CRYPTO_RANDOMBYTES);
byte[] temporaryRandomnessInput = new byte[CRYPTO_RANDOMBYTES];
secureRandom.nextBytes(temporaryRandomnessInput);
System.arraycopy(temporaryRandomnessInput, 0, randomness_input, CRYPTO_RANDOMBYTES, CRYPTO_RANDOMBYTES);
// --
// memcpy(randomness_input, &sk[CRYPTO_SECRETKEYBYTES - CRYPTO_SEEDBYTES], CRYPTO_SEEDBYTES);
System.arraycopy(privateKey, CRYPTO_SECRETKEYBYTES - CRYPTO_SEEDBYTES, randomness_input, 0, CRYPTO_SEEDBYTES);
// --
HashUtils.secureHashAlgorithmKECCAK256(
randomness_input, CRYPTO_RANDOMBYTES + CRYPTO_SEEDBYTES, HM_BYTES, message, 0, messageLength);
HashUtils.secureHashAlgorithmKECCAK256(
randomness, 0, CRYPTO_SEEDBYTES, randomness_input, 0, CRYPTO_RANDOMBYTES + CRYPTO_SEEDBYTES + HM_BYTES);
QTesla3PPolynomial.poly_uniform(a, privateKey, CRYPTO_SECRETKEYBYTES - 2 * CRYPTO_SEEDBYTES);
while (true)
{
sample_y(y, randomness, 0, ++nonce);
QTesla3PPolynomial.poly_ntt(y_ntt, y);
for (k = 0; k < PARAM_K; k++)
{
QTesla3PPolynomial.poly_mul(v, k * PARAM_N, a, k * PARAM_N, y_ntt);
}
hashFunction(c, 0, v, randomness_input, CRYPTO_RANDOMBYTES + CRYPTO_SEEDBYTES);
encodeC(pos_list, sign_list, c, 0);
QTesla3PPolynomial.sparse_mul8(Sc, privateKey, pos_list, sign_list);
QTesla3PPolynomial.poly_add(z, y, Sc);
if (testRejection(z))
{
continue;
}
for (k = 0; k < PARAM_K; k++)
{
QTesla3PPolynomial.sparse_mul8(Ec, k * PARAM_N, privateKey, (PARAM_N * (k + 1)), pos_list, sign_list);
QTesla3PPolynomial.poly_sub(v, k * PARAM_N, v, k * PARAM_N, Ec, k * PARAM_N);
rsp = test_correctness(v, k * PARAM_N);
if (rsp)
{
break;
} // TODO replace with contine outer
}
if (rsp)
{
continue;
}
encodeSignature(signature, 0, c, 0, z);
return 0;
}
// return 0;
}
static int verifying(
byte[] message,
final byte[] signature, int signatureOffset, int signatureLength,
final byte[] publicKey)
{
byte c[] = new byte[CRYPTO_C_BYTES];
byte c_sig[] = new byte[CRYPTO_C_BYTES];
byte seed[] = new byte[CRYPTO_SEEDBYTES];
byte hm[] = new byte[HM_BYTES];
int pos_list[] = new int[PARAM_H];
short sign_list[] = new short[PARAM_H];
int pk_t[] = new int[PARAM_N * PARAM_K];
long[] w = new long[PARAM_N * PARAM_K];
long[] a = new long[PARAM_N * PARAM_K];
long[] Tc = new long[PARAM_N * PARAM_K];
long[] z = new long[PARAM_N];
long[] z_ntt = new long[PARAM_N];
int k = 0;
if (signatureLength < CRYPTO_BYTES)
{
return -1;
}
decodeSignature(c, z, signature, signatureOffset);
if (testZ(z))
{
return -2;
}
decodePublicKey(pk_t, seed, 0, publicKey);
QTesla3PPolynomial.poly_uniform(a, seed, 0);
encodeC(pos_list, sign_list, c, 0);
QTesla3PPolynomial.poly_ntt(z_ntt, z);
for (k = 0; k < PARAM_K; k++)
{ // Compute w = az - tc
QTesla3PPolynomial.sparse_mul32(Tc, k * PARAM_N, pk_t, (k * PARAM_N), pos_list, sign_list);
QTesla3PPolynomial.poly_mul(w, k * PARAM_N, a, k * PARAM_N, z_ntt);
QTesla3PPolynomial.poly_sub(w, k * PARAM_N, w, k * PARAM_N, Tc, k * PARAM_N);
}
HashUtils.secureHashAlgorithmKECCAK256(
hm, 0, HM_BYTES, message, 0, message.length
);
hashFunction(c_sig, 0, w, hm, 0);
if (!memoryEqual(c, 0, c_sig, 0, CRYPTO_C_BYTES))
{
return -3;
}
return 0;
}
static void encodePrivateKey(byte[] privateKey, final long[] secretPolynomial, final long[] errorPolynomial, final byte[] seed, int seedOffset)
{
int i, k = 0;
int skPtr = 0;
for (i = 0; i < PARAM_N; i++)
{
privateKey[skPtr + i] = (byte)secretPolynomial[i];
}
skPtr += PARAM_N;
for (k = 0; k < PARAM_K; k++)
{
for (i = 0; i < PARAM_N; i++)
{
privateKey[skPtr + (k * PARAM_N + i)] = (byte)errorPolynomial[k * PARAM_N + i];
// System.out.printf("%d, %x\n", skPtr + (k * PARAM_N + i), privateKey[skPtr + (k * PARAM_N + i)]);
}
}
System.arraycopy(seed, seedOffset, privateKey, skPtr + (PARAM_K * PARAM_N), CRYPTO_SEEDBYTES * 2);
}
static void encodePublicKey(byte[] publicKey, final long[] T, final byte[] seedA, int seedAOffset)
{
int j = 0;
for (int i = 0; i < (PARAM_N * PARAM_K * PARAM_Q_LOG / 32); i += 15)
{
at(publicKey, i, 0, (int)(T[j] | (T[j + 1] << 30)));
at(publicKey, i, 1, (int)((T[j + 1] >> 2) | (T[j + 2] << 28)));
at(publicKey, i, 2, (int)((T[j + 2] >> 4) | (T[j + 3] << 26)));
at(publicKey, i, 3, (int)((T[j + 3] >> 6) | (T[j + 4] << 24)));
at(publicKey, i, 4, (int)((T[j + 4] >> 8) | (T[j + 5] << 22)));
at(publicKey, i, 5, (int)((T[j + 5] >> 10) | (T[j + 6] << 20)));
at(publicKey, i, 6, (int)((T[j + 6] >> 12) | (T[j + 7] << 18)));
at(publicKey, i, 7, (int)((T[j + 7] >> 14) | (T[j + 8] << 16)));
at(publicKey, i, 8, (int)((T[j + 8] >> 16) | (T[j + 9] << 14)));
at(publicKey, i, 9, (int)((T[j + 9] >> 18) | (T[j + 10] << 12)));
at(publicKey, i, 10, (int)((T[j + 10] >> 20) | (T[j + 11] << 10)));
at(publicKey, i, 11, (int)((T[j + 11] >> 22) | (T[j + 12] << 8)));
at(publicKey, i, 12, (int)((T[j + 12] >> 24) | (T[j + 13] << 6)));
at(publicKey, i, 13, (int)((T[j + 13] >> 26) | (T[j + 14] << 4)));
at(publicKey, i, 14, (int)((T[j + 14] >> 28) | (T[j + 15] << 2)));
j += 16;
}
System.arraycopy(seedA, seedAOffset, publicKey, PARAM_N * PARAM_K * PARAM_Q_LOG / 8, CRYPTO_SEEDBYTES);
}
static void decodePublicKey(int[] publicKey, byte[] seedA, int seedAOffset, final byte[] publicKeyInput)
{
int j = 0;
byte[] pt = publicKeyInput;
int maskq = (1 << PARAM_Q_LOG) - 1;
for (int i = 0; i < PARAM_N * PARAM_K; i += 16)
{
publicKey[i] = at(pt, j, 0) & maskq;
publicKey[i + 1] = ((at(pt, j, 0) >>> 30) | (at(pt, j, 1) << 2)) & maskq;
publicKey[i + 2] = ((at(pt, j, 1) >>> 28) | (at(pt, j, 2) << 4)) & maskq;
publicKey[i + 3] = ((at(pt, j, 2) >>> 26) | (at(pt, j, 3) << 6)) & maskq;
publicKey[i + 4] = ((at(pt, j, 3) >>> 24) | (at(pt, j, 4) << 8)) & maskq;
publicKey[i + 5] = ((at(pt, j, 4) >>> 22) | (at(pt, j, 5) << 10)) & maskq;
publicKey[i + 6] = ((at(pt, j, 5) >>> 20) | (at(pt, j, 6) << 12)) & maskq;
publicKey[i + 7] = ((at(pt, j, 6) >>> 18) | (at(pt, j, 7) << 14)) & maskq;
publicKey[i + 8] = ((at(pt, j, 7) >>> 16) | (at(pt, j, 8) << 16)) & maskq;
publicKey[i + 9] = ((at(pt, j, 8) >>> 14) | (at(pt, j, 9) << 18)) & maskq;
publicKey[i + 10] = ((at(pt, j, 9) >>> 12) | (at(pt, j, 10) << 20)) & maskq;
publicKey[i + 11] = ((at(pt, j, 10) >>> 10) | (at(pt, j, 11) << 22)) & maskq;
publicKey[i + 12] = ((at(pt, j, 11) >>> 8) | (at(pt, j, 12) << 24)) & maskq;
publicKey[i + 13] = ((at(pt, j, 12) >>> 6) | (at(pt, j, 13) << 26)) & maskq;
publicKey[i + 14] = ((at(pt, j, 13) >>> 4) | (at(pt, j, 14) << 28)) & maskq;
publicKey[i + 15] = (at(pt, j, 14) >>> 2) & maskq;
j += 15;
}
System.arraycopy(publicKeyInput, PARAM_N * PARAM_K * PARAM_Q_LOG / 8, seedA, seedAOffset, CRYPTO_SEEDBYTES);
}
private static boolean testZ(long[] Z)
{
// Returns false if valid, otherwise outputs 1 if invalid (rejected)
for (int i = 0; i < PARAM_N; i++)
{
if ((Z[i] < -(PARAM_B - PARAM_S)) || (Z[i] > PARAM_B - PARAM_S))
{
return true;
}
}
return false;
}
private static final int maskb1 = ((1 << (PARAM_B_BITS + 1)) - 1);
static void encodeSignature(byte[] signature, int signatureOffset, byte[] C, int cOffset, long[] Z)
{
int j = 0;
for (int i = 0; i < (PARAM_N * (PARAM_B_BITS + 1) / 32); i += 11)
{
at(signature, i, 0, (int)((Z[j + 0] & ((1 << 22) - 1)) | (Z[j + 1] << 22)));
at(signature, i, 1, (int)(((Z[j + 1] >>> 10) & ((1 << 12) - 1)) | (Z[j + 2] << 12)));
at(signature, i, 2, (int)(((Z[j + 2] >>> 20) & ((1 << 2) - 1)) | ((Z[j + 3] & maskb1) << 2) | (Z[j + 4] << 24)));
at(signature, i, 3, (int)(((Z[j + 4] >>> 8) & ((1 << 14) - 1)) | (Z[j + 5] << 14)));
at(signature, i, 4, (int)(((Z[j + 5] >>> 18) & ((1 << 4) - 1)) | ((Z[j + 6] & maskb1) << 4) | (Z[j + 7] << 26)));
at(signature, i, 5, (int)(((Z[j + 7] >>> 6) & ((1 << 16) - 1)) | (Z[j + 8] << 16)));
at(signature, i, 6, (int)(((Z[j + 8] >>> 16) & ((1 << 6) - 1)) | ((Z[j + 9] & maskb1) << 6) | (Z[j + 10] << 28)));
at(signature, i, 7, (int)(((Z[j + 10] >>> 4) & ((1 << 18) - 1)) | (Z[j + 11] << 18)));
at(signature, i, 8, (int)(((Z[j + 11] >>> 14) & ((1 << 8) - 1)) | ((Z[j + 12] & maskb1) << 8) | (Z[j + 13] << 30)));
at(signature, i, 9, (int)(((Z[j + 13] >>> 2) & ((1 << 20) - 1)) | (Z[j + 14] << 20)));
at(signature, i, 10, (int)(((Z[j + 14] >>> 12) & ((1 << 10) - 1)) | (Z[j + 15] << 10)));
j += 16;
}
System.arraycopy(C, cOffset, signature, signatureOffset + PARAM_N * (PARAM_B_BITS + 1) / 8, CRYPTO_C_BYTES);
}
static void decodeSignature(byte[] C, long[] Z, final byte[] signature, int signatureOffset)
{
int j = 0;
for (int i = 0; i < PARAM_N; i += 16)
{
Z[i] = (at(signature, j, 0) << 10) >> 10;
Z[i + 1] = (at(signature, j, 0) >>> 22) | ((at(signature, j, 1) << 20) >> 10);
Z[i + 2] = (at(signature, j, 1) >>> 12) | ((at(signature, j, 2) << 30) >> 10);
Z[i + 3] = ((at(signature, j, 2) << 8) >> 10);
Z[i + 4] = (at(signature, j, 2) >>> 24) | ((at(signature, j, 3) << 18) >> 10);
Z[i + 5] = (at(signature, j, 3) >>> 14) | ((at(signature, j, 4) << 28) >> 10);
Z[i + 6] = ((at(signature, j, 4) << 6) >> 10);
Z[i + 7] = (at(signature, j, 4) >>> 26) | ((at(signature, j, 5) << 16) >> 10);
Z[i + 8] = (at(signature, j, 5) >>> 16) | ((at(signature, j, 6) << 26) >> 10);
Z[i + 9] = ((at(signature, j, 6) << 4) >> 10);
Z[i + 10] = (at(signature, j, 6) >>> 28) | ((at(signature, j, 7) << 14) >> 10);
Z[i + 11] = (at(signature, j, 7) >>> 18) | ((at(signature, j, 8) << 24) >> 10);
Z[i + 12] = ((at(signature, j, 8) << 2) >> 10);
Z[i + 13] = (at(signature, j, 8) >>> 30) | ((at(signature, j, 9) << 12) >> 10);
Z[i + 14] = (at(signature, j, 9) >>> 20) | ((at(signature, j, 10) << 22) >> 10);
Z[i + 15] = (at(signature, j, 10) >> 10);
j += 11;
}
System.arraycopy(signature, signatureOffset + PARAM_N * (PARAM_B_BITS + 1) / 8, C, 0, CRYPTO_C_BYTES);
}
static void encodeC(int[] positionList, short[] signList, byte[] output, int outputOffset)
{
int count = 0;
int position;
short domainSeparator = 0;
short[] C = new short[PARAM_N];
byte[] randomness = new byte[HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE];
/* Use the Hash Value as Key to Generate Some Randomness */
HashUtils.customizableSecureHashAlgorithmKECCAK128Simple(
randomness, 0, HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE,
domainSeparator++,
output, outputOffset, CRYPTO_RANDOMBYTES
);
/* Use Rejection Sampling to Determine Positions to be Set in the New Vector */
Arrays.fill(C, (short)0);
/* Sample A Unique Position k times.
* Use Two Bytes
*/
for (int i = 0; i < PARAM_H; )
{
if (count > HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE - 3)
{
HashUtils.customizableSecureHashAlgorithmKECCAK128Simple(
randomness, 0, HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE,
domainSeparator++,
output, outputOffset, CRYPTO_RANDOMBYTES
);
count = 0;
}
position = (randomness[count] << 8) | (randomness[count + 1] & 0xFF);
position &= (PARAM_N - 1);
/* Position is between [0, n - 1] and Has not Been Set Yet
* Determine Signature
*/
if (C[position] == 0)
{
if ((randomness[count + 2] & 1) == 1)
{
C[position] = -1;
}
else
{
C[position] = 1;
}
positionList[i] = position;
signList[i] = C[position];
i++;
}
count += 3;
}
}
private static void hashFunction(byte[] output, int outputOffset, long[] v, final byte[] message, int messageOffset) //, int n, int d, int q)
{
int mask;
int cL;
byte[] T = new byte[PARAM_K * PARAM_N + HM_BYTES];
for (int k = 0; k < PARAM_K; k++)
{
int index = k * PARAM_N;
for (int i = 0; i < PARAM_N; i++)
{
int temp = (int)v[index];
// If v[i] > PARAM_Q/2 then v[i] -= PARAM_Q
mask = (PARAM_Q / 2 - temp) >> (RADIX32 - 1);
temp = ((temp - PARAM_Q) & mask) | (temp & ~mask);
cL = temp & ((1 << PARAM_D) - 1);
// If cL > 2^(d-1) then cL -= 2^d
mask = ((1 << (PARAM_D - 1)) - cL) >> (RADIX32 - 1);
cL = ((cL - (1 << PARAM_D)) & mask) | (cL & ~mask);
T[index++] = (byte)((temp - cL) >> PARAM_D);
}
}
System.arraycopy(message, messageOffset, T, PARAM_N * PARAM_K, HM_BYTES);
HashUtils.secureHashAlgorithmKECCAK256(output, outputOffset, CRYPTO_C_BYTES, T, 0, PARAM_K * PARAM_N + HM_BYTES);
}
static int lE24BitToInt(byte[] bs, int off)
{
int n = bs[off] & 0xff;
n |= (bs[++off] & 0xff) << 8;
n |= (bs[++off] & 0xff) << 16;
return n;
}
private static int NBLOCKS_SHAKE = HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE / (((PARAM_B_BITS + 1) + 7) / 8);
private static int BPLUS1BYTES = ((PARAM_B_BITS + 1) + 7) / 8;
static void sample_y(long[] y, byte[] seed, int seedOffset, int nonce)
{ // Sample polynomial y, such that each coefficient is in the range [-B,B]
int i = 0, pos = 0, nblocks = PARAM_N;
byte buf[] = new byte[PARAM_N * BPLUS1BYTES + 1];
int nbytes = BPLUS1BYTES;
short dmsp = (short)(nonce << 8);
HashUtils.customizableSecureHashAlgorithmKECCAK256Simple(
buf, 0, PARAM_N * nbytes, dmsp++, seed, seedOffset, CRYPTO_RANDOMBYTES
);
while (i < PARAM_N)
{
if (pos >= nblocks * nbytes)
{
nblocks = NBLOCKS_SHAKE;
HashUtils.customizableSecureHashAlgorithmKECCAK256Simple(
buf, 0, PARAM_N * nbytes, dmsp++, seed, seedOffset, CRYPTO_RANDOMBYTES
);
pos = 0;
}
y[i] = lE24BitToInt(buf, pos) & ((1 << (PARAM_B_BITS + 1)) - 1);
y[i] -= PARAM_B;
if (y[i] != (1 << PARAM_B_BITS))
{
i++;
}
pos += nbytes;
}
}
private static void at(byte[] bs, int base, int index, int value)
{
Pack.intToLittleEndian(value, bs, (base * 4) + (index * 4));
}
private static int at(byte[] bs, int base, int index)
{
int off = (base * 4) + (index * 4);
int n = bs[off] & 0xff;
n |= (bs[++off] & 0xff) << 8;
n |= (bs[++off] & 0xff) << 16;
n |= bs[++off] << 24;
return n;
}
static boolean test_correctness(long[] v, int vpos)
{ // Check bounds for w = v - ec during signature verification. Returns 0 if valid, otherwise outputs 1 if invalid (rejected).
// This function leaks the position of the coefficient that fails the test (but this is independent of the secret data).
// It does not leak the sign of the coefficients.
int mask, left, val;
int t0, t1;
for (int i = 0; i < PARAM_N; i++)
{
// If v[i] > PARAM_Q/2 then v[i] -= PARAM_Q
mask = (int)(PARAM_Q / 2 - v[vpos + i]) >> (RADIX32 - 1);
val = (int)(((v[vpos + i] - PARAM_Q) & mask) | (v[vpos + i] & ~mask));
// If (Abs(val) < PARAM_Q/2 - PARAM_E) then t0 = 0, else t0 = 1
t0 = (int)(~(absolute(val) - (PARAM_Q / 2 - PARAM_E))) >>> (RADIX32 - 1);
left = val;
val = (val + (1 << (PARAM_D - 1)) - 1) >> PARAM_D;
val = left - (val << PARAM_D);
// If (Abs(val) < (1<<(PARAM_D-1))-PARAM_E) then t1 = 0, else t1 = 1
t1 = (int)(~(absolute(val) - ((1 << (PARAM_D - 1)) - PARAM_E))) >>> (RADIX32 - 1);
if ((t0 | t1) == 1) // Returns 1 if any of the two tests failed
{
return true;
}
}
return false;
}
private static boolean testRejection(long[] Z) //, int n, int b, int u)
{
int valid = 0;
for (int i = 0; i < PARAM_N; i++)
{
valid |= (PARAM_B - PARAM_S) - absolute(Z[i]);
}
return (valid >>> 31) > 0;
}
private static int absolute(int value)
{
return ((value >> 31) ^ value) - (value >> 31);
}
private static long absolute(long value)
{
return ((value >> 63) ^ value) - (value >> 63);
}
private static boolean checkPolynomial(long[] polynomial, int polyOffset, int bound)
{
int i, j, sum = 0, limit = PARAM_N;
long temp, mask;
long[] list = new long[PARAM_N];
for (j = 0; j < PARAM_N; j++)
{
list[j] = absolute((int)polynomial[polyOffset + j]);
}
for (j = 0; j < PARAM_H; j++)
{
for (i = 0; i < limit - 1; i++)
{
// If list[i+1] > list[i] then exchange contents
mask = (list[i + 1] - list[i]) >> (RADIX32 - 1);
temp = (list[i + 1] & mask) | (list[i] & ~mask);
list[i + 1] = (list[i] & mask) | (list[i + 1] & ~mask);
list[i] = temp;
}
sum += (int)list[limit - 1];
limit -= 1;
}
return (sum > bound);
}
// End of outer.
static class Gaussian
{
private static final int CDT_ROWS = 111;
private static final int CDT_COLS = 4;
private static final int CHUNK_SIZE = 512;
private static final long[] cdt_v = new long[]{
0x00000000L, 0x00000000L, 0x00000000L, 0x00000000L, // 0
0x0601F22AL, 0x280663D4L, 0x2E1B038CL, 0x1E75FCA7L, // 1
0x11F09FFAL, 0x162FE23DL, 0x403739B4L, 0x3F2AA531L, // 2
0x1DA089E9L, 0x437226E8L, 0x115E99C8L, 0x68C472A6L, // 3
0x28EAB25DL, 0x04C51FE2L, 0x13F63FD0L, 0x1E56BF40L, // 4
0x33AC2F26L, 0x14FDBA70L, 0x6618880FL, 0x792CE93EL, // 5
0x3DC767DCL, 0x4565C95FL, 0x7EAC4790L, 0x163F4D99L, // 6
0x4724FC62L, 0x3342C78AL, 0x390873B2L, 0x13A12ACEL, // 7
0x4FB448F4L, 0x5229D06DL, 0x09A6C84BL, 0x1D13CB0DL, // 8
0x576B8599L, 0x7423407FL, 0x1287EE2FL, 0x7B908556L, // 9
0x5E4786DAL, 0x3210BAF6L, 0x6881795CL, 0x13DF4F59L, // 10
0x644B2C92L, 0x431B3946L, 0x63F188D9L, 0x22AFB6DEL, // 11
0x697E90CEL, 0x77C362C3L, 0x600A627EL, 0x66AEDF96L, // 12
0x6DEE0B96L, 0x2798C9CEL, 0x147A98F9L, 0x27427F24L, // 13
0x71A92144L, 0x5765FCE4L, 0x0FF04C94L, 0x74183C18L, // 14
0x74C16FD5L, 0x1E2A0990L, 0x13EB545FL, 0x1CD9A2ADL, // 15
0x7749AC92L, 0x0DF36EEBL, 0x414629E5L, 0x66610A51L, // 16
0x7954BFA4L, 0x28079289L, 0x29D5B127L, 0x29B69601L, // 17
0x7AF5067AL, 0x2EDC2050L, 0x2B486556L, 0x43BF4664L, // 18
0x7C3BC17CL, 0x123D5E7AL, 0x63D4DD26L, 0x3B1E3755L, // 19
0x7D38AD76L, 0x2A9381D9L, 0x1D20D034L, 0x77C09C55L, // 20
0x7DF9C5DFL, 0x0E868CA7L, 0x23627687L, 0x78864423L, // 21
0x7E8B2ABAL, 0x18E5C810L, 0x7C85B42CL, 0x7AC98BCCL, // 22
0x7EF7237CL, 0x00908272L, 0x3D4B170EL, 0x3CD572E3L, // 23
0x7F4637C5L, 0x6DBA5125L, 0x5B0285ECL, 0x46661EB9L, // 24
0x7F7F5707L, 0x4A52EDEBL, 0x50ECECB1L, 0x7384DC42L, // 25
0x7FA808CCL, 0x23290598L, 0x704F7A4DL, 0x08532154L, // 26
0x7FC4A083L, 0x69BDF2D4L, 0x73B67B27L, 0x3AE237ADL, // 27
0x7FD870CAL, 0x42275557L, 0x6F2AE034L, 0x4E4B0395L, // 28
0x7FE5FB5DL, 0x3EF82C1BL, 0x256E2EB0L, 0x09E42B11L, // 29
0x7FEF1BFAL, 0x6C03A362L, 0x07334BD4L, 0x22B6B15FL, // 30
0x7FF52D4EL, 0x316C2C8CL, 0x1C77A4C3L, 0x1C3A974EL, // 31
0x7FF927BAL, 0x12AE54AEL, 0x6CC24956L, 0x3BA9A3E4L, // 32
0x7FFBBA43L, 0x749CC0E2L, 0x044B3068L, 0x620F14DAL, // 33
0x7FFD5E3DL, 0x4524AD91L, 0x31F84A1FL, 0x4D23AF51L, // 34
0x7FFE6664L, 0x535785B4L, 0x683C9E5EL, 0x2BD857DFL, // 35
0x7FFF0A41L, 0x0B291681L, 0x1CB4CE6FL, 0x32B314B9L, // 36
0x7FFF6E81L, 0x132C3D6FL, 0x4C8771CCL, 0x67421A75L, // 37
0x7FFFAAFEL, 0x4DBC6BEDL, 0x4E8644D2L, 0x5158A208L, // 38
0x7FFFCEFDL, 0x7A1E2D14L, 0x2CF905AAL, 0x79BFABD9L, // 39
0x7FFFE41EL, 0x4C6EC115L, 0x2D648F1AL, 0x4B01BA3EL, // 40
0x7FFFF059L, 0x319503C8L, 0x2CBEB96AL, 0x52FF656EL, // 41
0x7FFFF754L, 0x5DDD0D40L, 0x09D07206L, 0x6BF97EB5L, // 42
0x7FFFFB43L, 0x0B9E9822L, 0x5B584BE0L, 0x4974ED83L, // 43
0x7FFFFD71L, 0x76B81AE1L, 0x3C93755CL, 0x375F857BL, // 44
0x7FFFFEA3L, 0x7E66A1ECL, 0x3E342087L, 0x44ED1696L, // 45
0x7FFFFF49L, 0x26F6E190L, 0x7E3625F9L, 0x2F4F5849L, // 46
0x7FFFFFA1L, 0x2FA31694L, 0x0D53F684L, 0x59931C0DL, // 47
0x7FFFFFCFL, 0x5247BEC8L, 0x5CC20735L, 0x397CE966L, // 48
0x7FFFFFE7L, 0x4F4127C6L, 0x64926788L, 0x01CFEF66L, // 49
0x7FFFFFF3L, 0x6FAA69FDL, 0x26A67DC3L, 0x1FFA2528L, // 50
0x7FFFFFFAL, 0x0630D072L, 0x7AA0C1B7L, 0x7E90AAE6L, // 51
0x7FFFFFFDL, 0x0F2957BBL, 0x3ADCE1E6L, 0x5A311C28L, // 52
0x7FFFFFFEL, 0x4FD29431L, 0x6429F9EDL, 0x04653965L, // 53
0x7FFFFFFFL, 0x2CFAD60DL, 0x52ED82D1L, 0x26455881L, // 54
0x7FFFFFFFL, 0x5967A92FL, 0x5C85AB2DL, 0x188033BEL, // 55
0x7FFFFFFFL, 0x6E4C9DFEL, 0x76798EAFL, 0x0DC0BA65L, // 56
0x7FFFFFFFL, 0x77FDCCC8L, 0x194FF9ACL, 0x2C3FA855L, // 57
0x7FFFFFFFL, 0x7C6CE89EL, 0x01FA1A72L, 0x6C3DC40BL, // 58
0x7FFFFFFFL, 0x7E6D116EL, 0x5F82B352L, 0x57B67FCEL, // 59
0x7FFFFFFFL, 0x7F50FA31L, 0x31856599L, 0x579DC24BL, // 60
0x7FFFFFFFL, 0x7FB50089L, 0x43E64BB5L, 0x7F498E42L, // 61
0x7FFFFFFFL, 0x7FE04C2CL, 0x56CBFAEFL, 0x7FC9C15FL, // 62
0x7FFFFFFFL, 0x7FF2C7C0L, 0x5D509634L, 0x41DCA82BL, // 63
0x7FFFFFFFL, 0x7FFA8FE3L, 0x24F6020DL, 0x7B594401L, // 64
0x7FFFFFFFL, 0x7FFDCB1BL, 0x2D294BB3L, 0x1D1631BFL, // 65
0x7FFFFFFFL, 0x7FFF1DE1L, 0x5D75B704L, 0x323B12FEL, // 66
0x7FFFFFFFL, 0x7FFFA6B6L, 0x7E983E86L, 0x23392636L, // 67
0x7FFFFFFFL, 0x7FFFDD39L, 0x029CCA2CL, 0x035F7017L, // 68
0x7FFFFFFFL, 0x7FFFF2A3L, 0x205DBF7BL, 0x173D7F90L, // 69
0x7FFFFFFFL, 0x7FFFFAEFL, 0x3F79145BL, 0x642F005DL, // 70
0x7FFFFFFFL, 0x7FFFFE1BL, 0x23B2C7E4L, 0x6CA216CFL, // 71
0x7FFFFFFFL, 0x7FFFFF4DL, 0x1E959E3FL, 0x4A29BB03L, // 72
0x7FFFFFFFL, 0x7FFFFFBEL, 0x7C23D3D9L, 0x71DC92E4L, // 73
0x7FFFFFFFL, 0x7FFFFFE8L, 0x55110485L, 0x0E1813E2L, // 74
0x7FFFFFFFL, 0x7FFFFFF7L, 0x5EBC7B7BL, 0x2DFEE922L, // 75
0x7FFFFFFFL, 0x7FFFFFFDL, 0x0EDB0975L, 0x0C9F1639L, // 76
0x7FFFFFFFL, 0x7FFFFFFFL, 0x00DDA1A1L, 0x6DE86AA0L, // 77
0x7FFFFFFFL, 0x7FFFFFFFL, 0x54CF6D87L, 0x023F1F47L, // 78
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7186FF6AL, 0x5B71BF8CL, // 79
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7B375EBCL, 0x767A89DCL, // 80
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7E70BA89L, 0x44EBCEAAL, // 81
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7F7F98B5L, 0x44C8E44AL, // 82
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FD744C2L, 0x448EE5A4L, // 83
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FF34165L, 0x008855D0L, // 84
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFC1110L, 0x754A60B6L, // 85
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFECD77L, 0x44BE6D4AL, // 86
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFA3F4L, 0x7400A73EL, // 87
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFE4BDL, 0x1143830BL, // 88
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFF809L, 0x1A385059L, // 89
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFDB4L, 0x41CA0794L, // 90
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFF59L, 0x02FFB605L, // 91
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFD1L, 0x18360E8DL, // 92
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFF3L, 0x072A0E9AL, // 93
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFCL, 0x3C1BFEB0L, // 94
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x066EBCDDL, // 95
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x5FBE171AL, // 96
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x778EB81FL, // 97
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7DD211FEL, // 98
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7F71F071L, // 99
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FDC528FL, // 100
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FF7298CL, // 101
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFDD739L, // 102
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFF7ACAL, // 103
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFE056L, // 104
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFF893L, // 105
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFE48L, // 106
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFF9CL, // 107
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFE9L, // 108
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFBL, // 109
0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, 0x7FFFFFFFL, // 110
};
static void sample_gauss_poly(int nonce, byte[] seed, int seedOffset, long[] poly, int polyOffset)
{
int dmsp = nonce << 8;
byte samp[] = new byte[CHUNK_SIZE * CDT_COLS * 4]; // This is int32_t in C, we will treat it as byte[] in java
int c[] = new int[CDT_COLS];
int borrow, sign;
int mask = (-1) >>> 1;
for (int chunk = 0; chunk < PARAM_N; chunk += CHUNK_SIZE)
{
HashUtils.customizableSecureHashAlgorithmKECCAK256Simple(
samp, 0, CHUNK_SIZE * CDT_COLS * 4, (short)dmsp++, seed, seedOffset, CRYPTO_SEEDBYTES);
for (int i = 0; i < CHUNK_SIZE; i++)
{
poly[polyOffset + chunk + i] = 0;
for (int j = 1; j < CDT_ROWS; j++)
{
borrow = 0;
for (int k = CDT_COLS - 1; k >= 0; k--)
{
c[k] = (int)((at(samp, 0, i * CDT_COLS + k) & mask) - (cdt_v[j * CDT_COLS + k] + borrow));
borrow = c[k] >> (RADIX32 - 1);
}
poly[polyOffset + chunk + i] += ~borrow & 1;
}
sign = at(samp, 0, i * CDT_COLS) >> (RADIX32 - 1);
poly[polyOffset + chunk + i] = (sign & -poly[polyOffset + chunk + i]) | (~sign & poly[polyOffset + chunk + i]);
}
}
}
}
static boolean memoryEqual(byte[] left, int leftOffset, byte[] right, int rightOffset, int length)
{
if ((leftOffset + length <= left.length) && (rightOffset + length <= right.length))
{
for (int i = 0; i < length; i++)
{
if (left[leftOffset + i] != right[rightOffset + i])
{
return false;
}
}
return true;
}
else
{
return false;
}
}
static class QTesla3PPolynomial
{
private static final long[] zeta = new long[]{
147314272, 762289503, 284789571, 461457674, 723990704, 123382358, 685457283, 458774590, 644795450, 723622678, 441493948, 676062368, 648739792, 214990524, 261899220, 138474554,
205277234, 788000393, 541334956, 769530525, 786231394, 812002793, 251385069, 152717354, 674883688, 458756880, 323745289, 823881240, 686340396, 716163820, 107735873, 144028791,
586327243, 71257244, 739303131, 487030542, 313626215, 396596783, 664640087, 728258996, 854656117, 567834989, 2315110, 210792230, 795895843, 433034260, 432732757, 480454055,
750130006, 47628047, 2271301, 98590211, 729637734, 683553815, 476917424, 121851414, 296210757, 820475433, 403416438, 605633242, 804828963, 435181077, 781182803, 276684653,
329135201, 697859430, 248472020, 396579594, 109340098, 97605675, 755271019, 565755143, 534799496, 378374148, 85686225, 298978496, 650100484, 712463562, 818417023, 283716467,
269132585, 153024538, 223768950, 331863760, 761523727, 586019306, 805044248, 810909760, 77905343, 401203343, 162625701, 616243024, 659789238, 385270982, 720521140, 545633566,
688663167, 740046782, 257189758, 115795491, 101106443, 409863172, 622399622, 405606434, 498832246, 730567206, 350755879, 41236295, 561547732, 525723591, 18655497, 3396399,
289694332, 221478904, 738940554, 769726362, 32128402, 693016435, 275431006, 65292213, 601823865, 469363520, 480544944, 607230206, 473150754, 267072604, 463615065, 412972775,
197544577, 770873783, 189036815, 407973558, 110878446, 442760341, 667560342, 756992079, 663708407, 585601880, 763637579, 660019224, 424935088, 249313490, 844593983, 664952705,
274981537, 40233161, 655530034, 742724096, 8926394, 67709207, 616610795, 539664358, 306118645, 741629065, 283521858, 621397947, 369041534, 162477412, 258256937, 269480966,
75469364, 815614830, 724060729, 510819743, 489239410, 265607303, 103024793, 434961090, 474838542, 234701483, 505818866, 450427360, 188113529, 650423376, 599263141, 720479782,
755079140, 469798456, 745591660, 432033717, 530128582, 94480771, 722477467, 169342233, 35413255, 89769525, 424389771, 240236288, 360665614, 66702784, 76128663, 565345206,
605031892, 393503210, 249841967, 485930917, 45880284, 746120091, 684031522, 537926896, 408749937, 608644803, 692593939, 515424474, 748771159, 155377700, 347101257, 393516280,
708186062, 809233270, 562547654, 768251664, 651110951, 574473323, 588028067, 352359235, 646902518, 410726541, 134129459, 460099853, 829152883, 819102028, 7270760, 562515302,
419641762, 347973450, 161011009, 401974733, 619807719, 559105457, 276126568, 165473862, 380215069, 356617900, 347744328, 615885981, 824819772, 811367929, 6451967, 515345658,
648239021, 56427040, 709160497, 71545092, 390921213, 17177139, 194174898, 825533429, 497469884, 88988508, 64227614, 641021859, 159258883, 529265733, 823190295, 567280997,
414094239, 238392498, 695610059, 416342151, 90807038, 206865379, 568337348, 168011486, 844375038, 777332780, 147582038, 199025846, 396231915, 151630666, 466807217, 12672521,
570774644, 764098787, 283719496, 779154504, 383628791, 851035387, 395488461, 291115871, 52707730, 776449280, 479801706, 73403989, 402014636, 255214342, 56904698, 446531030,
639487570, 848061696, 202732901, 739018922, 653983847, 453022791, 391722680, 584290855, 270911670, 390838431, 653070075, 535876472, 83207555, 131151682, 505677504, 778583044,
472363568, 734419459, 768500943, 321131696, 371745445, 751887879, 51797676, 157604159, 838805925, 358099697, 763440819, 776721566, 719570904, 304610785, 656838485, 239522278,
796234199, 659506535, 825373307, 674901303, 250484891, 54612517, 410236408, 111976920, 728940855, 720463104, 559960962, 514189554, 637176165, 436151981, 485801800, 802811374,
549456481, 808832355, 112672706, 199163132, 807410080, 645955491, 365378122, 222316474, 381896744, 693909930, 402130292, 199856804, 277639257, 6848838, 648262319, 601521139,
108516632, 392382841, 563420106, 475932203, 249861415, 99274558, 152886431, 744977783, 269184267, 562674804, 760959275, 733098096, 771348891, 674288361, 631521272, 513632066,
476339117, 621937967, 206834230, 507101607, 420341698, 528715580, 853092790, 580174958, 278044321, 432350205, 603769437, 144426940, 733518338, 365468467, 848983278, 385382826,
846062026, 593903051, 216589699, 219997638, 350708517, 733669279, 624754239, 499821820, 772548008, 199677439, 287505007, 144199205, 215073292, 825467700, 101591831, 571728784,
841898341, 420897808, 61323616, 823475752, 72494861, 89946011, 236594097, 379582577, 539401967, 221244669, 479250487, 100726882, 263096036, 647161225, 491060387, 419890898,
816149055, 546441322, 690509770, 215789647, 5870948, 821456387, 294091098, 783700004, 278643020, 520754327, 813718894, 123610053, 157045201, 265331664, 807174256, 258134244,
703519669, 300265991, 41892125, 662173055, 439638698, 494124024, 700655120, 535348417, 37146186, 379568907, 644973451, 554904963, 594757858, 477812802, 266085643, 46337543,
454847754, 496027901, 701947604, 5722633, 790588605, 233501932, 728956461, 462020148, 214013660, 155806979, 159935426, 423504958, 638889309, 602641304, 277759403, 71654804,
710920410, 108337831, 641924564, 252946326, 463082282, 23277660, 142056200, 263317553, 9044238, 367816044, 349695658, 291597086, 230031083, 385106216, 281069679, 644033142,
134221740, 212497862, 686686078, 787489098, 781698667, 748299513, 774414792, 380836293, 114027649, 766161763, 10536612, 707355910, 100516219, 637517297, 21478533, 769067854,
668364559, 410803198, 64949715, 643421522, 525590993, 585289785, 423839840, 554109325, 450599860, 295350132, 435789550, 306634115, 611298620, 777817576, 553655202, 804525538,
794474290, 138542076, 780958763, 62228371, 738032107, 684994110, 661486955, 67099069, 68865906, 32413094, 358393763, 205008770, 849715545, 289798348, 384767209, 787328590,
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815224795, 335964550, 408353208, 604252110, 574953308, 563501897, 515015302, 313600371, 178773384, 417549087, 510834475, 167049599, 488791556, 664276219, 82933775, 822541833,
17111190, 409659978, 96304098, 500484311, 269766378, 327037310, 584926256, 538611363, 404132255, 170931824, 744460626, 154011192, 322194096, 215888234, 258344560, 702851111,
192046250, 738511820, 530780560, 57197515, 335425579, 410968369, 830078545, 448351649, 208921555, 356653676, 718038774, 424362596, 158929491, 420096666, 387056270, 797383293,
381201911, 466480709, 373815662, 84912008, 4969808, 524614597, 93448903, 559481007, 400813998, 665223025, 601707338, 466022707, 192709574, 615503265, 822863744, 639854175,
158713505, 12757666, 389196370, 823105438, 682974863, 468401586, 93508626, 402414043, 806357152, 180544963, 27876186, 321527031, 329857607, 669501423, 829809824, 333202822,
106923493, 368991112, 282317903, 790323774, 517381333, 548329656, 236147848, 700119793, 404187488, 343578810, 798813301, 497964535, 656188346, 678161787, 736817175, 518031339,
716647183, 674797219, 308643560, 714308544, 516103468, 605229646, 564549717, 47650358, 706404486, 494887760, 152496104, 54954356, 271435602, 76951527, 136123931, 601823638,
329273401, 252710411, 754980731, 351648254, 49239731, 837833233, 88830509, 598216539, 155534490, 669603727, 418388693, 79322074, 636251444, 703683994, 796989459, 126497707,
644863316, 730359063, 265213001, 64483814, 552208981, 8135537, 782474322, 780853310, 733976806, 395661138, 128188419, 266691358, 407092046, 447349747, 526245954, 119272088,
359659635, 812410956, 669835517, 565139408, 248981831, 139910745, 685462294, 406991131, 709944045, 589819925, 714299787, 72923680, 648836181, 145321778, 392775383, 243093077,
412955839, 174619485, 310936394, 699727061, 421087619, 745421519, 539546394, 29471558, 116471631, 852650639, 443777703, 773131303, 81618669, 756719012, 702785073, 847088653,
851830586, 300908692, 430974543, 463215976, 668971423, 414271988, 108350516, 345933325, 716417649, 174980945, 679092437, 384030489, 814050910, 506580116, 249434097, 178438885,
146797119, 10369463, 296359082, 215645133, 149545847, 483689845, 322009569, 308978588, 38531178, 328571637, 815396967, 709744233, 765487128, 645413104, 564779557, 213794315,
280607549, 124792697, 423470554, 631348430, 21223627, 220718413, 598791979, 47797633, 734556299, 590321944, 168292920, 484802055, 340999812, 769601438, 42675060, 116026587,
227462622, 543574607, 444066479, 467277895, 278798674, 597413704, 350168725, 301936652, 82885511, 656047519, 765110538, 52228202, 533005731, 621989298, 148235931, 317833915,
118463894, 522391939, 451332724, 548031654, 73854149, 527786213, 583308898, 840663438, 275278054, 362931963, 587861579, 830807449, 431695707, 178004048, 75513216, 60681147,
638603143, 470791469, 490903319, 527370962, 102981857, 224220555, 756514239, 293859807, 797926303, 620196520, 466126507, 646136763, 265504163, 213257337, 92270416, 398713724,
91810366, 724247342, 855386762, 631553083, 376095634, 833728623, 636218061, 510719408, 378530670, 737821436, 127781731, 3443282, 770116208, 769633348, 430675947, 40370755,
52361322, 844601468, 442556599, 128290354, 494328514, 405616679, 651440882, 421541290, 171560170, 386143493, 284277254, 450756213, 248305939, 526718005, 300780198, 714218239,
68021827, 527353904, 236472015, 309320156, 683815803, 527980097, 598849444, 779607597, 339852811, 845420163, 96001931, 326760873, 609319751, 520803868, 140143851, 766988701,
844896794, 532008178, 388459130, 574799295, 760406065, 773758517, 453271555, 134636434, 155747417, 105505251, 796987277, 399016325, 71156680, 709579308, 274279004, 96962867,
476741915, 585319990, 709143538, 721328791, 293159344, 640577897, 138404614, 572892015, 394460832, 465897068, 325895331, 413861636, 447337182, 376950267, 721061932, 181671909,
272138750, 247768905, 634973622, 280653872, 165108426, 134241779, 15142090, 153256717, 783424845, 773227607, 172477802, 504458250, 349868083, 461422806, 487725644, 586146740,
561546455, 815406759, 468110471, 126476456, 285774551, 522013234, 801943660, 79684345, 654558548, 188038414, 249923934, 551812615, 562560206, 407120348, 384535446, 176837117,
433155458, 82591339, 459412819, 435604627, 312211805, 98158590, 752137480, 446017293, 666480139, 60261988, 275386848, 642778031, 8582401, 677484160, 819506256, 333441964,
25465219, 190315429, 91529631, 754681170, 563660271, 167135649, 20270015, 115773732, 658954441, 132923202, 844102455, 453432758, 250487209, 423813160, 632223296, 537494486,
158265753, 327949044, 494109748, 659672289, 67984726, 422358258, 345141182, 164372996, 338500924, 41400311, 207638305, 832074651, 50853458, 228267776, 621895888, 635834787,
484972544, 181125024, 558134871, 282159878, 788157855, 145576343, 194837894, 501440949, 63641414, 252098681, 835930645, 662856247, 456140980, 206147937, 565198503, 449503819,
684013129, 494002381, 793836418, 649296754, 444313288, 136544068, 540002286, 355912945, 613175147, 134541429, 843111781, 672612536, 541098995, 734996181, 211869705, 620777828,
756152791, 242128346, 795442420, 73925532, 735232214, 738668090, 530800757, 266183732, 97165934, 803231879, 10057267, 175942047, 181460965, 320684297, 637472526, 213840116,
182671953, 152704513, 388004388, 597349323, 473851493, 445333546, 679315863, 267078568, 46538491, 530171754, 698082287, 75308587, 266467406, 96440883, 759196579, 470119952,
381731475, 428392158, 10628712, 173921356, 116809433, 323843928, 812172630, 403459283, 655501128, 261944441, 774418023, 790520709, 589149480, 264133112, 806274256, 752372117,
66236193, 713859568, 90804933, 551864345, 843839891, 600244073, 719230074, 803646506, 254956426, 138935723, 738829647, 109576220, 105819621, 249706947, 110623114, 10002331,
795710911, 547062229, 721440199, 820747461, 397666160, 685179945, 463869301, 470338753, 641244231, 652990696, 698429485, 41147155, 638072709, 515832968, 241130026, 314161759,
526815813, 529167244, 53391331, 782008115, 822962086, 337706389, 648197286, 209496506, 760818531, 781900302, 717270807, 709143641, 740503641, 734328409, 514061476, 844010670,
67993787, 712083588, 319801387, 338260400, 48758556, 304195768, 478833380, 841413917, 710197685, 196321647, 777595184, 775983866, 147506314, 620961439, 399972264, 398715644,
684489092, 659918078, 664075287, 723890579, 643103903, 508525962, 375409248, 501237729, 740609783, 639854810, 510797913, 521151016, 421045341, 193698327, 800266392, 93518128,
443879633, 699245445, 194001794, 123905867, 75572337, 242620749, 463111940, 755239011, 31718790, 162155292, 386689240, 381413538, 745322913, 367897558, 343088005, 31706107,
10842029, 404961623, 537521191, 281624684, 372852160, 55286017, 534907560, 264398082, 667644310, 486871690, 716964533, 734731419, 143593638, 293949413, 760014789, 594443755,
147804127, 537704286, 460110740, 596458323, 577775570, 333025386, 260094086, 711487611, 359384182, 323339045, 716675075, 248179763, 525311626, 76326208, 559009987, 548139736,
541721430, 31450329, 653923741, 676193285, 295171241, 558845563, 387079118, 403184480, 807941436, 501042343, 284608894, 705710380, 82388415, 763336555, 126077422, 438548854,
606252517, 144569238, 126964439, 809559381, 263253751, 547929033, 236704198, 377978058, 59501955, 749500335, 254242336, 605755194, 408388953, 116242711, 116340056, 691021496,
48100285, 371076069, 638156108, 211570763, 185945242, 653505761, 667569173, 335131755, 736662207, 572078378, 755939949, 840393623, 322934679, 520522390, 252068808, 491370519,
200565770, 552637112, 182345569, 394747039, 822229467, 817698102, 644484388, 156591766, 729600982, 695826242, 509682463, 785132583, 746139100, 188369785, 628995003, 406654440,
650660075, 676485042, 540766742, 493428142, 753346328, 82608613, 670846442, 145894970, 770907988, 621807160, 14676199, 793865193, 36579515, 619741404, 303691972, 794920577,
134684826, 190038753, 538889970, 836657477, 643017556, 316870164, 464572481, 305395359, 446406992, 587814221, 423552502, 122802120, 146043780, 173756097, 130720237, 445515559,
109884833, 133119099, 804139234, 834841519, 458514524, 74213698, 490363622, 119287122, 165016718, 351506713, 433750226, 439149867, 348281119, 319795826, 320785867, 446561207,
705678831, 714536161, 172299381, 552925586, 635421942, 851853231, 208071525, 142303096, 93164236, 207534795, 655906672, 558127940, 98870558, 388322132, 87475979, 835970665,
61996500, 298060757, 256194194, 563529863, 249184704, 451295997, 73892211, 559049908, 44006160, 832886345, 720732161, 255948582, 827295342, 629663637, 323103159, 155698755,
598913314, 586685341, 761273875, 135225209, 324099714, 391112815, 493469140, 796490769, 667498514, 148390126, 721802249, 781884558, 309264043, 603401759, 503111668, 563611748,
363342598, 383209405, 108340736, 758017880, 145907493, 312330194, 608895549, 45540348, 143092704, 772401556, 806068040, 853177536, 662120004, 463347842, 495085709, 560431884,
274002454, 76985308, 519320299, 253092838, 727478114, 593752634, 490277266, 206283832, 701277908, 504787112, 816832531, 730997507, 27807749, 58254704, 584933136, 515463756,
241104222, 251881934, 566567573, 592887586, 528932268, 88111104, 523103099, 448331392, 351083975, 157811347, 758866581, 802151021, 843579185, 481417280, 507414106, 462708367,
461501222, 790988186, 462220673, 727683888, 159759683, 59757110, 310746434, 326369241, 305829588, 457718309, 529317279, 503631310, 661769334, 343160359, 472216278, 740498212,
11312284, 760170115, 513391009, 538224236, 710934956, 491998229, 539829044, 610387964, 86624968, 72542777, 493966272, 132327984, 371526334, 182549152, 51622114, 173997077,
550633787, 205437301, 435219235, 406409162, 414751325, 33371226, 40899348, 77245052, 763383124, 817701136, 598256078, 357440859, 468418959, 353612800, 721601331, 262567156,
521577430, 232027892, 75986872, 443113391, 107360999, 482079354, 563502258, 782475535, 402866161, 515580626, 742688144, 677398836, 425899303, 42066550, 537192943, 430672016,
115368023, 64053241, 92008456, 74327791, 572607165, 681138002, 378104858, 695786430, 844827190, 436817825, 751393351, 142965259, 81300919, 688342617, 433082724, 221191094,
712003270, 301076404, 747091407, 514191589, 814985450, 260951422, 187161058, 22316970, 806106670, 759397054, 158423624, 419813636, 462241316, 438231460, 108466764, 212745115,
386264342, 176072326, 767127195, 399981627, 762991681, 173125691, 464627163, 770046798, 179369718, 829917528, 693004603, 178596003, 422852852, 182684967, 662425026, 713404098,
766206683, 130088738, 321282752, 134898541, 86701214, 120555423, 464987852, 82865891, 758340585, 138256323, 308997895, 659614345, 510091933, 822699180, 464631718, 819896232,
120792059, 160708255, 462868879, 72974246, 260451492, 120601343, 228097712, 369436704, 155304088, 74380537, 732305166, 203294189, 307421597, 96510570, 634243454, 486539430,
16204477, 241987531, 317824421, 510180366, 794475492, 262770124, 441034891, 741864347, 205569410, 684844547, 340863522, 440616421, 454438375, 26285496, 141886125, 648947081,
3791510, 529746935, 317826713, 411458050, 661690316, 45696331, 679684665, 184597094, 829228068, 375683582, 591739456, 855242340, 628594662, 30968619, 363932244, 103091463,
614269714, 465960778, 791477766, 332731888, 853151007, 266045534, 132189407, 435008168, 65667470, 669304246, 760035868, 481409581, 36650645, 523634336, 702968013, 351902214,
284360680, 34261165, 593134528, 337534074, 239112910, 710342799, 163287447, 20209506, 780785984, 480727309, 125776519, 691236193, 603228570, 48261672, 183120677, 73638683,
3430616, 568026489, 808739797, 298585898, 64471573, 724550960, 568093636, 187449517, 655699449, 672689645, 829049456, 263525899, 612969883, 621652807, 186362075, 731851539,
377104257, 39335761, 210768226, 253965025, 201921517, 715681274, 369453531, 18897741, 612559390, 660723864, 476963596, 585483298, 318614839, 227626072, 298891387, 110505944,
814885802, 177563961, 443724544, 374856237, 577963338, 617516835, 475669105, 633353115, 12579943, 796644307, 569746680, 22381253, 343603333, 724567543, 845363898, 4023795,
801359177, 347489967, 214644600, 78674056, 131782857, 284041623, 660502381, 161470286, 668158595, 765738294, 715872268, 678418089, 280458288, 758715787, 9311288, 490771912,
757112000, 253990619, 698573830, 390611635, 52593584, 421202448, 494394112, 386893540, 29349323, 533111491, 774401558, 108660117, 405990553, 143728136, 852741683, 354532633,
440222591, 663461253, 593338391, 298882952, 758170600, 660294062, 332348846, 541714172, 77716403, 169377728, 71932929, 110210904, 776771173, 645222398, 162195941, 792388932,
502165627, 146897021, 243625970, 139123400, 462352793, 409369440, 247509680, 270865496, 539140627, 16949766, 245869282, 637926655, 37386603, 383033875, 316560876, 707909555,
367315004, 173821041, 529529257, 227507318, 831716891, 830055847, 228911074, 205127100, 178872273, 819938491, 129875615, 764680417, 97028082, 560682982, 433649390, 727508847,
494848582, 81279272, 435186566, 174468080, 69172161, 241860102, 692179355, 333985572, 788895276, 469576414, 594155471, 157828532, 182105752, 310394758, 673085082, 695719789,
39004854, 251000641, 98748282, 744318650, 815050298, 622456803, 240419561, 403871914, 202214044, 627433637, 649505808, 668918393, 334630440, 386856024, 352649543, 135139523,
216499252, 736376783, 269223150, 468318208, 801808348, 180378366, 640086372, 672618369, 291378195, 732195369, 805632553, 518515631, 603280165, 629836417, 59712833, 531020081,
708771168, 539819295, 179149444, 552251927, 458994127, 584987693, 238644928, 640603619, 46728500, 843989005, 688747457, 236924093, 261539965, 705411056, 765907765, 38095657,
382461698, 146650814, 351462947, 749417520, 628887925, 800857475, 790554154, 695483946, 160495923, 40896482, 471385785, 535516195, 197056285, 622795937, 368016917, 696525353,
377315918, 58087122, 246518254, 431338589, 795949654, 611141265, 406307405, 365750089, 396243561, 843849531, 33802729, 573076974, 557841126, 411725124, 109489622, 370935707,
372610558, 769825999, 367932152, 231499145, 240819898, 22648665, 418344529, 142438794, 552806180, 669450690, 614608056, 784369586, 258710636, 474742428, 166021530, 805595815,
603578176, 686703780, 412868426, 26588048, 379895115, 77550061, 751188758, 294447541, 433574579, 234362222, 821492181, 23912038, 681093196, 483584545, 404339808, 396405029,
744756742, 702481685, 413127074, 204115019, 187381271, 633523978, 433629465, 628184183, 783160918, 268799033, 646479372, 160458176, 602612912, 644506365, 391554011, 676966578,
386430153, 98736426, 412745127, 296141927, 685909285, 355152260, 361415843, 127323093, 586337666, 1734791, 368678692, 155431915, 597290023, 109507713, 291804866, 135016081,
144077689, 35054937, 16808265, 431962815, 534195521, 629326143, 309352001, 319948849, 443083246, 336744161, 100845182, 314804947, 476736581, 468528479, 416978018, 35141019,
43314058, 384847955, 665126798, 295857628, 768013680, 741182796, 157855570, 695547618, 145251639, 818473396, 708640763, 87460130, 736400748, 465173936, 376720282, 437268868,
137236663, 693860377, 247960644, 402124416, 656418852, 231401654, 248187016, 628418583, 224261112, 120581342, 49749199, 588812480, 309599954, 111357387, 14507354, 754564049,
513444423, 816496110, 509193085, 361635970, 190608265, 697367838, 230953561, 140447357, 27745100, 163340427, 607823059, 325305463, 383028479, 269707244, 475022415, 708990989,
738971809, 797646021, 126610937, 589310701, 191123172, 819715815, 337443183, 432224976, 337343783, 257301390, 172631141, 560659319, 646332329, 55110483, 467212803, 442977895,
311159578, 569890333, 669396086, 536323022, 542648615, 366162176, 88951009, 408335586, 276237497, 384733042, 525960156, 74199534, 338209206, 676233089, 264342641, 241682204,
226505461, 165013960, 129858819, 664852498, 432090291, 165700308, 382150900, 537002255, 368893910, 61006155, 238726881, 92317627, 632392147, 404715651, 802622348, 126100061,
306024238, 397891265, 214661020, 211132870, 783722518, 149847645, 665379914, 624725195, 85864665, 496272723, 304811252, 29995710, 410500887, 756406394, 31206753, 647154006,
596539568, 783214792, 286381882, 24560691, 681500270, 774933112, 506538708, 850347997, 611696036, 512607061, 251719669, 367108021, 456442965, 636694730, 399940257, 73870039,
85190759, 264953709, 238854238, 395048514, 612738126, 27417876, 652695826, 188238483, 324168828, 736238139, 789061724, 529275445, 382304068, 176318391, 709989466, 14237691,
};
private static final long[] zetainv = new long[]{
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365085534, 208984696, 593049885, 755419039, 376895434, 634901252, 316743954, 476563344, 619551824, 766199910, 783651060, 32670169, 794822305, 435248113, 14247580, 284417137,
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597888984, 693668509, 487104387, 234747974, 572624063, 114516856, 550027276, 316481563, 239535126, 788436714, 847219527, 113421825, 200615887, 815912760, 581164384, 191193216,
11551938, 606832431, 431210833, 196126697, 92508342, 270544041, 192437514, 99153842, 188585579, 413385580, 745267475, 448172363, 667109106, 85272138, 658601344, 443173146,
392530856, 589073317, 382995167, 248915715, 375600977, 386782401, 254322056, 790853708, 580714915, 163129486, 824017519, 86419559, 117205367, 634667017, 566451589, 852749522,
837490424, 330422330, 294598189, 814909626, 505390042, 125578715, 357313675, 450539487, 233746299, 446282749, 755039478, 740350430, 598956163, 116099139, 167482754, 310512355,
135624781, 470874939, 196356683, 239902897, 693520220, 454942578, 778240578, 45236161, 51101673, 270126615, 94622194, 524282161, 632376971, 703121383, 587013336, 572429454,
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594246701, 641155397, 207406129, 180083553, 414651973, 132523243, 211350471, 397371331, 170688638, 732763563, 132155217, 394688247, 571356350, 93856418, 708831649, 841908230,
};
static void poly_uniform(long[] a, byte[] seed, int seedOffset)
{
int pos = 0, i = 0, nbytes = (PARAM_Q_LOG + 7) / 8;
int nblocks = PARAM_GEN_A;
int val1, val2, val3, val4, mask = (1 << PARAM_Q_LOG) - 1;
byte[] buf = new byte[HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE * PARAM_GEN_A];
short dmsp = 0;
HashUtils.customizableSecureHashAlgorithmKECCAK128Simple(
buf, 0, HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE * PARAM_GEN_A,
dmsp++,
seed, seedOffset, CRYPTO_RANDOMBYTES
);
while (i < PARAM_K * PARAM_N)
{
if (pos > HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE * nblocks - 4 * nbytes)
{
nblocks = 1;
HashUtils.customizableSecureHashAlgorithmKECCAK128Simple(
buf, 0, HashUtils.SECURE_HASH_ALGORITHM_KECCAK_128_RATE * PARAM_GEN_A,
dmsp++,
seed, seedOffset, CRYPTO_RANDOMBYTES
);
pos = 0;
}
val1 = Pack.littleEndianToInt(buf, pos) & mask;
pos += nbytes;
val2 = Pack.littleEndianToInt(buf, pos) & mask;
pos += nbytes;
val3 = Pack.littleEndianToInt(buf, pos) & mask;
pos += nbytes;
val4 = Pack.littleEndianToInt(buf, pos) & mask;
pos += nbytes;
if (val1 < PARAM_Q && i < PARAM_K * PARAM_N)
{
a[i++] = reduce((long)val1 * PARAM_R2_INVN);
}
if (val2 < PARAM_Q && i < PARAM_K * PARAM_N)
{
a[i++] = reduce((long)val2 * PARAM_R2_INVN);
}
if (val3 < PARAM_Q && i < PARAM_K * PARAM_N)
{
a[i++] = reduce((long)val3 * PARAM_R2_INVN);
}
if (val4 < PARAM_Q && i < PARAM_K * PARAM_N)
{
a[i++] = reduce((long)val4 * PARAM_R2_INVN);
}
}
}
static long reduce(long a)
{ // Montgomery reduction
long u;
u = (a * (long)PARAM_QINV) & 0xFFFFFFFFL;
u *= PARAM_Q;
a += u;
return a >> 32;
}
static void ntt(long[] a, long[] w)
{ // Forward NTT transform
int NumoProblems = PARAM_N >> 1, jTwiddle = 0;
for (; NumoProblems > 0; NumoProblems >>= 1)
{
int jFirst, j = 0;
for (jFirst = 0; jFirst < PARAM_N; jFirst = j + NumoProblems)
{
int W = (int)w[jTwiddle++];
for (j = jFirst; j < jFirst + NumoProblems; j++)
{
long temp = barr_reduce(reduce(W * a[j + NumoProblems]));
a[j + NumoProblems] = barr_reduce(a[j] + (2L * PARAM_Q - temp));
a[j] = barr_reduce(temp + a[j]);
}
}
}
}
static long barr_reduce(long a)
{ // Barrett reduction
long u = (((long)a * PARAM_BARR_MULT) >> PARAM_BARR_DIV); // TODO u may need to be cast back to int.
return a - u * PARAM_Q;
}
static void nttinv(long[] a, long[] w)
{ // Inverse NTT transform
int NumoProblems = 1, jTwiddle = 0;
for (NumoProblems = 1; NumoProblems < PARAM_N; NumoProblems *= 2)
{
int jFirst, j = 0;
for (jFirst = 0; jFirst < PARAM_N; jFirst = j + NumoProblems)
{
int W = (int)w[jTwiddle++];
for (j = jFirst; j < jFirst + NumoProblems; j++)
{
long temp = a[j];
a[j] = barr_reduce((temp + a[j + NumoProblems]));
a[j + NumoProblems] = barr_reduce(reduce(W * (temp + (2L * PARAM_Q - a[j + NumoProblems]))));
}
}
}
}
static void nttinv(long[] a, int aPos, long[] w)
{ // Inverse NTT transform
int NumoProblems = 1, jTwiddle = 0;
for (NumoProblems = 1; NumoProblems < PARAM_N; NumoProblems *= 2)
{
int jFirst, j = 0;
for (jFirst = 0; jFirst < PARAM_N; jFirst = j + NumoProblems)
{
int W = (int)w[jTwiddle++];
for (j = jFirst; j < jFirst + NumoProblems; j++)
{
long temp = a[aPos + j];
a[aPos + j] = barr_reduce((temp + a[aPos + j + NumoProblems]));
a[aPos + j + NumoProblems] = barr_reduce(reduce((long)W * (temp + (2L * PARAM_Q - a[aPos + j + NumoProblems]))));
}
}
}
}
static void poly_ntt(long[] x_ntt, long[] x)
{ // Call to NTT function. Avoids input destruction
for (int i = 0; i < PARAM_N; i++)
{
x_ntt[i] = x[i];
}
ntt(x_ntt, zeta);
}
static void poly_pointwise(long[] result, long[] x, long[] y)
{ // Pointwise polynomial multiplication result = x.y
for (int i = 0; i < PARAM_N; i++)
{
result[i] = reduce((long)x[i] * y[i]);
}
}
static void poly_pointwise(long[] result, int rpos, long[] x, int xpos, long[] y)
{ // Pointwise polynomial multiplication result = x.y
for (int i = 0; i < PARAM_N; i++)
{
result[i + rpos] = reduce((long)x[i + xpos] * y[i]);
}
}
static void poly_mul(long[] result, long[] x, long[] y)
{ // Polynomial multiplication result = x*y, with in place reduction for (X^N+1)
// The input x is assumed to be in NTT form
// long[] y_ntt = new long[PARAM_N];
//
// for (int i = 0; i < PARAM_N; i++)
// {
// y_ntt[i] = y[i];
// }
//
// ntt(y_ntt, zeta);
poly_pointwise(result, x, y);
nttinv(result, zetainv);
}
static void poly_mul(long[] result, int rpos, long[] x, int xpos, long[] y)
{ // Polynomial multiplication result = x*y, with in place reduction for (X^N+1)
poly_pointwise(result, rpos, x, xpos, y);
nttinv(result, rpos, zetainv);
}
static void poly_add(long[] result, long[] x, long[] y)
{ // Polynomial addition result = x+y
for (int i = 0; i < PARAM_N; i++)
{
result[i] = x[i] + y[i];
}
}
static void poly_sub(long[] result, int rpos, long[] x, int xpos, long[] y, int ypos)
{ // Polynomial subtraction result = x-y
for (int i = 0; i < PARAM_N; i++)
{
result[rpos + i] = barr_reduce(x[xpos + i] - y[ypos + i]);
}
}
static void poly_add_correct(long[] result, int rpos, long[] x, int xpos, long[] y, int ypos)
{ // Polynomial addition result = x+y with correction
for (int i = 0; i < PARAM_N; i++)
{
result[rpos + i] = x[xpos + i] + y[ypos + i];
result[rpos + i] -= PARAM_Q;
result[rpos + i] += (result[rpos + i] >> (RADIX32 - 1)) & PARAM_Q; // If result[i] >= q then subtract q
}
}
static void poly_sub_correct(int[] result, int[] x, int[] y)
{ // Polynomial subtraction result = x-y with correction
for (int i = 0; i < PARAM_N; i++)
{
result[i] = x[i] - y[i];
result[i] += (result[i] >> (RADIX32 - 1)) & PARAM_Q; // If result[i] < 0 then add q
}
}
static void sparse_mul8(long[] prod, int ppos, byte[] s, int spos, int[] pos_list, short[] sign_list)
{
int i, j, pos;
for (i = 0; i < PARAM_N; i++)
{
prod[ppos + i] = 0;
}
for (i = 0; i < PARAM_H; i++)
{
pos = pos_list[i];
for (j = 0; j < pos; j++)
{
prod[ppos + j] = prod[ppos + j] - sign_list[i] * s[spos + j + PARAM_N - pos];
}
for (j = pos; j < PARAM_N; j++)
{
prod[ppos + j] = prod[ppos + j] + sign_list[i] * s[spos + j - pos];
}
}
}
static void sparse_mul8(long[] prod, byte[] s, int[] pos_list, short[] sign_list)
{
int i, j, pos;
byte t[] = s;
for (i = 0; i < PARAM_N; i++)
{
prod[i] = 0;
}
for (i = 0; i < PARAM_H; i++)
{
pos = pos_list[i];
for (j = 0; j < pos; j++)
{
prod[j] = prod[j] - sign_list[i] * t[j + PARAM_N - pos];
}
for (j = pos; j < PARAM_N; j++)
{
prod[j] = prod[j] + sign_list[i] * t[j - pos];
}
}
}
static void sparse_mul16(int[] prod, int s[], int pos_list[], short sign_list[])
{
int i, j, pos;
// short[] t = s;
for (i = 0; i < PARAM_N; i++)
{
prod[i] = 0;
}
for (i = 0; i < PARAM_H; i++)
{
pos = pos_list[i];
for (j = 0; j < pos; j++)
{
prod[j] = prod[j] - sign_list[i] * s[j + PARAM_N - pos];
}
for (j = pos; j < PARAM_N; j++)
{
prod[j] = prod[j] + sign_list[i] * s[j - pos];
}
}
}
static void sparse_mul32(int[] prod, int[] pk, int[] pos_list, short[] sign_list)
{
int i, j, pos;
for (i = 0; i < PARAM_N; i++)
{
prod[i] = 0;
}
for (i = 0; i < PARAM_H; i++)
{
pos = pos_list[i];
for (j = 0; j < pos; j++)
{
prod[j] = prod[j] - sign_list[i] * pk[j + PARAM_N - pos];
}
for (j = pos; j < PARAM_N; j++)
{
prod[j] = prod[j] + sign_list[i] * pk[j - pos];
}
}
}
static void sparse_mul32(long[] prod, int ppos, int[] pk, int pkPos, int[] pos_list, short[] sign_list)
{
int i, j, pos;
for (i = 0; i < PARAM_N; i++)
{
prod[ppos + i] = 0;
}
for (i = 0; i < PARAM_H; i++)
{
pos = pos_list[i];
for (j = 0; j < pos; j++)
{
prod[ppos + j] = prod[ppos + j] - sign_list[i] * pk[pkPos + j + PARAM_N - pos];
}
for (j = pos; j < PARAM_N; j++)
{
prod[ppos + j] = prod[ppos + j] + sign_list[i] * pk[pkPos + j - pos];
}
}
}
}
}
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