85 lines
3.3 KiB
Java
85 lines
3.3 KiB
Java
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package org.bouncycastle.crypto.signers;
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import org.bouncycastle.crypto.AsymmetricBlockCipher;
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import org.bouncycastle.crypto.CipherParameters;
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import org.bouncycastle.crypto.CryptoException;
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import org.bouncycastle.crypto.DataLengthException;
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import org.bouncycastle.crypto.Digest;
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import org.bouncycastle.crypto.Signer;
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import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
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import org.bouncycastle.crypto.params.ParametersWithRandom;
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import org.bouncycastle.util.Arrays;
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/* loaded from: classes6.dex */
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public class GenericSigner implements Signer {
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private final Digest digest;
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private final AsymmetricBlockCipher engine;
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private boolean forSigning;
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@Override // org.bouncycastle.crypto.Signer
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public boolean verifySignature(byte[] bArr) {
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if (this.forSigning) {
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throw new IllegalStateException("GenericSigner not initialised for verification");
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}
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int digestSize = this.digest.getDigestSize();
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byte[] bArr2 = new byte[digestSize];
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this.digest.doFinal(bArr2, 0);
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try {
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byte[] processBlock = this.engine.processBlock(bArr, 0, bArr.length);
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if (processBlock.length < digestSize) {
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byte[] bArr3 = new byte[digestSize];
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System.arraycopy(processBlock, 0, bArr3, digestSize - processBlock.length, processBlock.length);
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processBlock = bArr3;
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}
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return Arrays.constantTimeAreEqual(processBlock, bArr2);
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} catch (Exception unused) {
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return false;
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}
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}
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@Override // org.bouncycastle.crypto.Signer
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public void update(byte[] bArr, int i, int i2) {
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this.digest.update(bArr, i, i2);
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}
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@Override // org.bouncycastle.crypto.Signer
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public void update(byte b) {
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this.digest.update(b);
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}
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@Override // org.bouncycastle.crypto.Signer
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public void reset() {
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this.digest.reset();
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}
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@Override // org.bouncycastle.crypto.Signer
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public void init(boolean z, CipherParameters cipherParameters) {
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this.forSigning = z;
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AsymmetricKeyParameter asymmetricKeyParameter = cipherParameters instanceof ParametersWithRandom ? (AsymmetricKeyParameter) ((ParametersWithRandom) cipherParameters).getParameters() : (AsymmetricKeyParameter) cipherParameters;
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if (z && !asymmetricKeyParameter.isPrivate()) {
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throw new IllegalArgumentException("signing requires private key");
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}
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if (!z && asymmetricKeyParameter.isPrivate()) {
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throw new IllegalArgumentException("verification requires public key");
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}
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reset();
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this.engine.init(z, cipherParameters);
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}
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@Override // org.bouncycastle.crypto.Signer
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public byte[] generateSignature() throws CryptoException, DataLengthException {
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if (!this.forSigning) {
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throw new IllegalStateException("GenericSigner not initialised for signature generation.");
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}
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int digestSize = this.digest.getDigestSize();
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byte[] bArr = new byte[digestSize];
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this.digest.doFinal(bArr, 0);
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return this.engine.processBlock(bArr, 0, digestSize);
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}
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public GenericSigner(AsymmetricBlockCipher asymmetricBlockCipher, Digest digest) {
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this.engine = asymmetricBlockCipher;
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this.digest = digest;
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}
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}
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