87 lines
2.6 KiB
Java
87 lines
2.6 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.Digest;
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import org.bouncycastle.crypto.Mac;
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import org.bouncycastle.crypto.params.KeyParameter;
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import org.bouncycastle.util.Arrays;
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/* loaded from: classes6.dex */
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public class SSL3Mac implements Mac {
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private Digest digest;
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private int padLength;
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private byte[] secret;
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private static final byte IPAD_BYTE = 54;
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static final byte[] IPAD = genPad(IPAD_BYTE, 48);
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private static final byte OPAD_BYTE = 92;
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static final byte[] OPAD = genPad(OPAD_BYTE, 48);
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@Override // org.bouncycastle.crypto.Mac
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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.Mac
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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.Mac
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public void reset() {
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this.digest.reset();
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Digest digest = this.digest;
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byte[] bArr = this.secret;
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digest.update(bArr, 0, bArr.length);
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this.digest.update(IPAD, 0, this.padLength);
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}
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@Override // org.bouncycastle.crypto.Mac
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public void init(CipherParameters cipherParameters) {
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this.secret = Arrays.clone(((KeyParameter) cipherParameters).getKey());
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reset();
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}
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public Digest getUnderlyingDigest() {
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return this.digest;
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}
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@Override // org.bouncycastle.crypto.Mac
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public int getMacSize() {
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return this.digest.getDigestSize();
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}
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@Override // org.bouncycastle.crypto.Mac
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public String getAlgorithmName() {
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StringBuilder sb = new StringBuilder();
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sb.append(this.digest.getAlgorithmName());
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sb.append("/SSL3MAC");
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return sb.toString();
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}
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@Override // org.bouncycastle.crypto.Mac
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public int doFinal(byte[] bArr, int i) {
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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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Digest digest = this.digest;
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byte[] bArr3 = this.secret;
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digest.update(bArr3, 0, bArr3.length);
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this.digest.update(OPAD, 0, this.padLength);
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this.digest.update(bArr2, 0, digestSize);
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int doFinal = this.digest.doFinal(bArr, i);
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reset();
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return doFinal;
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}
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private static byte[] genPad(byte b, int i) {
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byte[] bArr = new byte[i];
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Arrays.fill(bArr, b);
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return bArr;
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}
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public SSL3Mac(Digest digest) {
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this.digest = digest;
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this.padLength = digest.getDigestSize() == 20 ? 40 : 48;
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}
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}
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