32 lines
1.8 KiB
Java
32 lines
1.8 KiB
Java
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package org.bouncycastle.pqc.crypto.mceliece;
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import org.bouncycastle.pqc.math.linearalgebra.GF2Matrix;
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import org.bouncycastle.pqc.math.linearalgebra.GF2Vector;
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import org.bouncycastle.pqc.math.linearalgebra.GF2mField;
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import org.bouncycastle.pqc.math.linearalgebra.GoppaCode;
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import org.bouncycastle.pqc.math.linearalgebra.Permutation;
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import org.bouncycastle.pqc.math.linearalgebra.PolynomialGF2mSmallM;
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/* loaded from: classes6.dex */
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final class McElieceCCA2Primitives {
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public static GF2Vector encryptionPrimitive(McElieceCCA2PublicKeyParameters mcElieceCCA2PublicKeyParameters, GF2Vector gF2Vector, GF2Vector gF2Vector2) {
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return (GF2Vector) mcElieceCCA2PublicKeyParameters.getG().leftMultiplyLeftCompactForm(gF2Vector).add(gF2Vector2);
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}
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public static GF2Vector[] decryptionPrimitive(McElieceCCA2PrivateKeyParameters mcElieceCCA2PrivateKeyParameters, GF2Vector gF2Vector) {
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int k = mcElieceCCA2PrivateKeyParameters.getK();
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Permutation p = mcElieceCCA2PrivateKeyParameters.getP();
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GF2mField field = mcElieceCCA2PrivateKeyParameters.getField();
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PolynomialGF2mSmallM goppaPoly = mcElieceCCA2PrivateKeyParameters.getGoppaPoly();
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GF2Matrix h = mcElieceCCA2PrivateKeyParameters.getH();
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PolynomialGF2mSmallM[] qInv = mcElieceCCA2PrivateKeyParameters.getQInv();
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GF2Vector gF2Vector2 = (GF2Vector) gF2Vector.multiply(p.computeInverse());
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GF2Vector syndromeDecode = GoppaCode.syndromeDecode((GF2Vector) h.rightMultiply(gF2Vector2), field, goppaPoly, qInv);
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GF2Vector gF2Vector3 = (GF2Vector) ((GF2Vector) gF2Vector2.add(syndromeDecode)).multiply(p);
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return new GF2Vector[]{gF2Vector3.extractRightVector(k), (GF2Vector) syndromeDecode.multiply(p)};
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}
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private McElieceCCA2Primitives() {
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}
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}
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