51 lines
1.8 KiB
Java
51 lines
1.8 KiB
Java
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package com.google.android.gms.internal.p002firebaseauthapi;
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import java.security.GeneralSecurityException;
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import java.security.interfaces.ECPrivateKey;
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import javax.crypto.Mac;
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import javax.crypto.spec.SecretKeySpec;
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/* loaded from: classes2.dex */
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public final class zzpv {
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private final ECPrivateKey zza;
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public final byte[] zza(byte[] bArr, String str, byte[] bArr2, byte[] bArr3, int i, int i2) throws GeneralSecurityException {
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byte[] zzc = zzpp.zzc(bArr, zzpx.zzh(this.zza, zzpx.zzk(this.zza.getParams(), i2, bArr)));
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Mac mac = (Mac) zzpz.zzb.zza(str);
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if (i <= mac.getMacLength() * 255) {
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if (bArr2 == null || bArr2.length == 0) {
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mac.init(new SecretKeySpec(new byte[mac.getMacLength()], str));
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} else {
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mac.init(new SecretKeySpec(bArr2, str));
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}
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byte[] bArr4 = new byte[i];
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mac.init(new SecretKeySpec(mac.doFinal(zzc), str));
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byte[] bArr5 = new byte[0];
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int i3 = 1;
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int i4 = 0;
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while (true) {
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mac.update(bArr5);
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mac.update((byte[]) null);
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mac.update((byte) i3);
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bArr5 = mac.doFinal();
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int length = bArr5.length;
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int i5 = i4 + length;
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if (i5 < i) {
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System.arraycopy(bArr5, 0, bArr4, i4, length);
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i3++;
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i4 = i5;
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} else {
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System.arraycopy(bArr5, 0, bArr4, i4, i - i4);
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return bArr4;
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}
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}
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} else {
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throw new GeneralSecurityException("size too large");
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}
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}
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public zzpv(ECPrivateKey eCPrivateKey) {
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this.zza = eCPrivateKey;
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}
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}
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