36 lines
1.6 KiB
Java
36 lines
1.6 KiB
Java
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package org.bouncycastle.pqc.crypto.sphincs;
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import java.security.SecureRandom;
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import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
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import org.bouncycastle.crypto.AsymmetricCipherKeyPairGenerator;
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import org.bouncycastle.crypto.Digest;
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import org.bouncycastle.crypto.KeyGenerationParameters;
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import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
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import org.bouncycastle.pqc.crypto.sphincs.Tree;
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/* loaded from: classes6.dex */
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public class SPHINCS256KeyPairGenerator implements AsymmetricCipherKeyPairGenerator {
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private SecureRandom random;
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private Digest treeDigest;
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@Override // org.bouncycastle.crypto.AsymmetricCipherKeyPairGenerator
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public void init(KeyGenerationParameters keyGenerationParameters) {
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this.random = keyGenerationParameters.getRandom();
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this.treeDigest = ((SPHINCS256KeyGenerationParameters) keyGenerationParameters).getTreeDigest();
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}
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@Override // org.bouncycastle.crypto.AsymmetricCipherKeyPairGenerator
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public AsymmetricCipherKeyPair generateKeyPair() {
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Tree.leafaddr leafaddrVar = new Tree.leafaddr();
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byte[] bArr = new byte[1088];
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this.random.nextBytes(bArr);
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byte[] bArr2 = new byte[1056];
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System.arraycopy(bArr, 32, bArr2, 0, 1024);
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leafaddrVar.level = 11;
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leafaddrVar.subtree = 0L;
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leafaddrVar.subleaf = 0L;
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Tree.treehash(new HashFunctions(this.treeDigest), bArr2, 1024, 5, bArr, leafaddrVar, bArr2, 0);
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return new AsymmetricCipherKeyPair((AsymmetricKeyParameter) new SPHINCSPublicKeyParameters(bArr2), (AsymmetricKeyParameter) new SPHINCSPrivateKeyParameters(bArr));
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}
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}
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