83 lines
3.2 KiB
Java
83 lines
3.2 KiB
Java
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package com.google.android.gms.internal.p002firebaseauthapi;
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import com.google.common.base.Ascii;
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import java.security.GeneralSecurityException;
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import java.security.InvalidKeyException;
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import java.util.Arrays;
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import java.util.Collection;
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import javax.crypto.AEADBadTagException;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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/* loaded from: classes2.dex */
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public final class zzpo implements zzat {
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private static final Collection zza = Arrays.asList(64);
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private static final byte[] zzb = new byte[16];
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private final zzql zzc;
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private final byte[] zzd;
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public zzpo(byte[] bArr) throws GeneralSecurityException {
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if (!zzdv.zza(1)) {
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throw new GeneralSecurityException("Can not use AES-SIV in FIPS-mode.");
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}
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Collection collection = zza;
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int length = bArr.length;
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if (!collection.contains(Integer.valueOf(length))) {
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throw new InvalidKeyException("invalid key size: " + length + " bytes; key must have 64 bytes");
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}
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int i = length >> 1;
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byte[] copyOfRange = Arrays.copyOfRange(bArr, 0, i);
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this.zzd = Arrays.copyOfRange(bArr, i, length);
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this.zzc = new zzql(copyOfRange);
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}
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@Override // com.google.android.gms.internal.p002firebaseauthapi.zzat
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public final byte[] zza(byte[] bArr, byte[] bArr2) throws GeneralSecurityException {
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byte[] zzd;
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int length = bArr.length;
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if (length < 16) {
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throw new GeneralSecurityException("Ciphertext too short.");
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}
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Cipher cipher = (Cipher) zzpz.zza.zza("AES/CTR/NoPadding");
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byte[] copyOfRange = Arrays.copyOfRange(bArr, 0, 16);
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byte[] bArr3 = (byte[]) copyOfRange.clone();
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bArr3[8] = (byte) (bArr3[8] & Ascii.DEL);
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bArr3[12] = (byte) (bArr3[12] & Ascii.DEL);
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cipher.init(2, new SecretKeySpec(this.zzd, "AES"), new IvParameterSpec(bArr3));
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byte[] copyOfRange2 = Arrays.copyOfRange(bArr, 16, length);
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byte[] doFinal = cipher.doFinal(copyOfRange2);
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if (copyOfRange2.length == 0 && doFinal == null && zzqr.zza()) {
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doFinal = new byte[0];
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}
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byte[][] bArr4 = {bArr2, doFinal};
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byte[] zza2 = this.zzc.zza(zzb, 16);
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for (int i = 0; i <= 0; i++) {
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byte[] bArr5 = bArr4[i];
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if (bArr5 == null) {
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bArr5 = new byte[0];
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}
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zza2 = zzpp.zzd(zziz.zzb(zza2), this.zzc.zza(bArr5, 16));
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}
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byte[] bArr6 = bArr4[1];
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int length2 = bArr6.length;
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if (length2 >= 16) {
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int length3 = zza2.length;
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if (length2 < length3) {
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throw new IllegalArgumentException("xorEnd requires a.length >= b.length");
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}
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zzd = Arrays.copyOf(bArr6, length2);
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for (int i2 = 0; i2 < zza2.length; i2++) {
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int i3 = (length2 - length3) + i2;
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zzd[i3] = (byte) (zzd[i3] ^ zza2[i2]);
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}
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} else {
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zzd = zzpp.zzd(zziz.zza(bArr6), zziz.zzb(zza2));
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}
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if (zzpp.zzb(copyOfRange, this.zzc.zza(zzd, 16))) {
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return doFinal;
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}
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throw new AEADBadTagException("Integrity check failed.");
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}
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}
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