Package org.bouncycastle.pqc.math.ntru.polynomial

Examples of org.bouncycastle.pqc.math.ntru.polynomial.IntegerPolynomial

233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
            {
                f = ProductFormPolynomial.fromBinary(is, N, d1, d2, d3 + 1, d3);
            }
            else
            {
                IntegerPolynomial fInt = IntegerPolynomial.fromBinary3Tight(is, N);
                f = sparse ? new SparseTernaryPolynomial(fInt) : new DenseTernaryPolynomial(fInt);
            }

            if (params.basisType == NTRUSigningKeyGenerationParameters.BASIS_TYPE_STANDARD)
            {
                IntegerPolynomial fPrimeInt = IntegerPolynomial.fromBinary(is, N, q);
                for (int i = 0; i < fPrimeInt.coeffs.length; i++)
                {
                    fPrimeInt.coeffs[i] -= q / 2;
                }
                fPrime = fPrimeInt;
View Full Code Here
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
            int q = params.q;

            os.write(getEncoded(f));
            if (params.basisType == NTRUSigningKeyGenerationParameters.BASIS_TYPE_STANDARD)
            {
                IntegerPolynomial fPrimeInt = fPrime.toIntegerPolynomial();
                for (int i = 0; i < fPrimeInt.coeffs.length; i++)
                {
                    fPrimeInt.coeffs[i] += q / 2;
                }
                os.write(fPrimeInt.toBinary(q));
            }
            else
            {
                os.write(getEncoded(fPrime));
            }
View Full Code Here
77
78
79
80
81
82
83
84
85
86
87
            t = ProductFormPolynomial.fromBinary(is, N, df1, df2, df3Ones, df3NegOnes);
        }
        else
        {
            h = IntegerPolynomial.fromBinary(is, params.N, params.q);
            IntegerPolynomial fInt = IntegerPolynomial.fromBinary3Tight(is, params.N);
            t = params.sparse ? new SparseTernaryPolynomial(fInt) : new DenseTernaryPolynomial(fInt);
        }

        init();
    }
View Full Code Here
91
92
93
94
95
96
97
98
99
100
101
     */
    private void init()
    {
        if (params.fastFp)
        {
            fp = new IntegerPolynomial(params.N);
            fp.coeffs[0] = 1;
        }
        else
        {
            fp = t.toIntegerPolynomial().invertF3();
View Full Code Here
99
100
101
102
103
104
105
106
107
108
109
110
    }

    private byte[] signHash(byte[] msgHash, NTRUSigningPrivateKeyParameters kp)
    {
        int r = 0;
        IntegerPolynomial s;
        IntegerPolynomial i;

        NTRUSigningPublicKeyParameters kPub = kp.getPublicKey();
        do
        {
            r++;
View Full Code Here
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
        int perturbationBases = params.B;

        NTRUSigningPrivateKeyParameters kPriv = kp;
        NTRUSigningPublicKeyParameters kPub = kp.getPublicKey();

        IntegerPolynomial s = new IntegerPolynomial(N);
        int iLoop = perturbationBases;
        while (iLoop >= 1)
        {
            Polynomial f = kPriv.getBasis(iLoop).f;
            Polynomial fPrime = kPriv.getBasis(iLoop).fPrime;

            IntegerPolynomial y = f.mult(i);
            y.div(q);
            y = fPrime.mult(y);

            IntegerPolynomial x = fPrime.mult(i);
            x.div(q);
            x = f.mult(x);

            IntegerPolynomial si = y;
            si.sub(x);
            s.add(si);

            IntegerPolynomial hi = (IntegerPolynomial)kPriv.getBasis(iLoop).h.clone();
            if (iLoop > 1)
            {
                hi.sub(kPriv.getBasis(iLoop - 1).h);
            }
            else
            {
                hi.sub(kPub.h);
            }
            i = si.mult(hi, q);

            iLoop--;
        }

        Polynomial f = kPriv.getBasis(0).f;
        Polynomial fPrime = kPriv.getBasis(0).fPrime;

        IntegerPolynomial y = f.mult(i);
        y.div(q);
        y = fPrime.mult(y);

        IntegerPolynomial x = fPrime.mult(i);
        x.div(q);
        x = f.mult(x);

        y.sub(x);
        s.add(y);
        s.modPositive(q);
View Full Code Here
207
208
209
210
211
212
213
214
215
    private boolean verifyHash(byte[] msgHash, byte[] sig, NTRUSigningPublicKeyParameters pub)
    {
        ByteBuffer sbuf = ByteBuffer.wrap(sig);
        byte[] rawSig = new byte[sig.length - 4];
        sbuf.get(rawSig);
        IntegerPolynomial s = IntegerPolynomial.fromBinary(rawSig, params.N, params.q);
        int r = sbuf.getInt();
        return verify(createMsgRep(msgHash, r), s, pub.h);
    }
View Full Code Here
218
219
220
221
222
223
224
225
226
227
    {
        int q = params.q;
        double normBoundSq = params.normBoundSq;
        double betaSq = params.betaSq;

        IntegerPolynomial t = h.mult(s, q);
        t.sub(i);
        long centeredNormSq = (long)(s.centeredNormSq(q) + betaSq * t.centeredNormSq(q));
        return centeredNormSq <= normBoundSq;
    }
View Full Code Here
231
232
233
234
235
236
237
238
239
240
241
        int N = params.N;
        int q = params.q;

        int c = 31 - Integer.numberOfLeadingZeros(q);
        int B = (c + 7) / 8;
        IntegerPolynomial i = new IntegerPolynomial(N);

        ByteBuffer cbuf = ByteBuffer.allocate(msgHash.length + 4);
        cbuf.put(msgHash);
        cbuf.putInt(r);
        NTRUSignerPrng prng = new NTRUSignerPrng(cbuf.array(), params.hashAlg);
View Full Code Here
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
        }

        // [f(1)+g(1)]^2 = 4
        E -= 4;

        IntegerPolynomial u = (IntegerPolynomial)f.clone();
        IntegerPolynomial v = (IntegerPolynomial)g.clone();
        int j = 0;
        int k = 0;
        int maxAdjustment = N;
        while (k < maxAdjustment && j < N)
        {
            int D = 0;
            int i = 0;
            while (i < N)
            {
                int D1 = F.coeffs[i] * f.coeffs[i];
                int D2 = G.coeffs[i] * g.coeffs[i];
                int D3 = 4 * N * (D1 + D2);
                D += D3;
                i++;
            }
            // f(1)+g(1) = 2
            int D1 = 4 * (F.sumCoeffs() + G.sumCoeffs());
            D -= D1;

            if (D > E)
            {
                F.sub(u);
                G.sub(v);
                k++;
                j = 0;
            }
            else if (D < -E)
            {
                F.add(u);
                G.add(v);
                k++;
                j = 0;
            }
            j++;
            u.rotate1();
            v.rotate1();
        }
    }
View Full Code Here
TOP

Related Classes of org.bouncycastle.pqc.math.ntru.polynomial.IntegerPolynomial

  • org.bouncycastle.pqc.crypto.ntru.NTRUEncryptionKeyPairGenerator
  • org.bouncycastle.pqc.crypto.ntru.NTRUEncryptionPrivateKeyParameters
  • org.bouncycastle.pqc.crypto.ntru.NTRUEngine
  • org.bouncycastle.pqc.crypto.ntru.NTRUSigner
  • org.bouncycastle.pqc.crypto.ntru.NTRUSigningKeyPairGenerator
  • org.bouncycastle.pqc.crypto.ntru.NTRUSigningPrivateKeyParameters$Basis
  • org.bouncycastle.pqc.math.ntru.euclid.BigIntEuclidean
  • java.util.concurrent.ExecutorService
  • java.math.BigInteger
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.