72 lines
3.4 KiB
Java
72 lines
3.4 KiB
Java
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package org.bouncycastle.crypto.tls;
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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.DSA;
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import org.bouncycastle.crypto.Signer;
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import org.bouncycastle.crypto.digests.NullDigest;
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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.crypto.signers.DSADigestSigner;
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/* loaded from: classes6.dex */
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public abstract class TlsDSASigner extends AbstractTlsSigner {
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protected abstract DSA createDSAImpl(short s);
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protected abstract short getSignatureAlgorithm();
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protected CipherParameters makeInitParameters(boolean z, CipherParameters cipherParameters) {
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return cipherParameters;
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}
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@Override // org.bouncycastle.crypto.tls.TlsSigner
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public boolean verifyRawSignature(SignatureAndHashAlgorithm signatureAndHashAlgorithm, byte[] bArr, AsymmetricKeyParameter asymmetricKeyParameter, byte[] bArr2) throws CryptoException {
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Signer makeSigner = makeSigner(signatureAndHashAlgorithm, true, false, asymmetricKeyParameter);
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if (signatureAndHashAlgorithm == null) {
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makeSigner.update(bArr2, 16, 20);
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} else {
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makeSigner.update(bArr2, 0, bArr2.length);
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}
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return makeSigner.verifySignature(bArr);
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}
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protected Signer makeSigner(SignatureAndHashAlgorithm signatureAndHashAlgorithm, boolean z, boolean z2, CipherParameters cipherParameters) {
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if ((signatureAndHashAlgorithm != null) != TlsUtils.isTLSv12(this.context)) {
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throw new IllegalStateException();
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}
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if (signatureAndHashAlgorithm != null && signatureAndHashAlgorithm.getSignature() != getSignatureAlgorithm()) {
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throw new IllegalStateException();
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}
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short hash = signatureAndHashAlgorithm == null ? (short) 2 : signatureAndHashAlgorithm.getHash();
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DSADigestSigner dSADigestSigner = new DSADigestSigner(createDSAImpl(hash), z ? new NullDigest() : TlsUtils.createHash(hash));
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dSADigestSigner.init(z2, makeInitParameters(z2, cipherParameters));
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return dSADigestSigner;
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}
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@Override // org.bouncycastle.crypto.tls.TlsSigner
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public byte[] generateRawSignature(SignatureAndHashAlgorithm signatureAndHashAlgorithm, AsymmetricKeyParameter asymmetricKeyParameter, byte[] bArr) throws CryptoException {
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int length;
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int i;
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Signer makeSigner = makeSigner(signatureAndHashAlgorithm, true, true, new ParametersWithRandom(asymmetricKeyParameter, this.context.getSecureRandom()));
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if (signatureAndHashAlgorithm == null) {
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i = 16;
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length = 20;
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} else {
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length = bArr.length;
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i = 0;
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}
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makeSigner.update(bArr, i, length);
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return makeSigner.generateSignature();
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}
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@Override // org.bouncycastle.crypto.tls.TlsSigner
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public Signer createVerifyer(SignatureAndHashAlgorithm signatureAndHashAlgorithm, AsymmetricKeyParameter asymmetricKeyParameter) {
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return makeSigner(signatureAndHashAlgorithm, false, false, asymmetricKeyParameter);
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}
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@Override // org.bouncycastle.crypto.tls.TlsSigner
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public Signer createSigner(SignatureAndHashAlgorithm signatureAndHashAlgorithm, AsymmetricKeyParameter asymmetricKeyParameter) {
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return makeSigner(signatureAndHashAlgorithm, false, true, asymmetricKeyParameter);
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}
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}
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