47 lines
1.8 KiB
Java
47 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.spec.AlgorithmParameterSpec;
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import javax.crypto.Cipher;
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import javax.crypto.SecretKey;
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import javax.crypto.spec.GCMParameterSpec;
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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 zzdu implements zzap {
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private static final ThreadLocal zza = new zzdt();
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private final SecretKey zzb;
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public zzdu(byte[] bArr) throws GeneralSecurityException {
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zzqs.zzb(bArr.length);
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this.zzb = new SecretKeySpec(bArr, "AES");
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}
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@Override // com.google.android.gms.internal.p002firebaseauthapi.zzap
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public final byte[] zza(byte[] bArr, byte[] bArr2) throws GeneralSecurityException {
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AlgorithmParameterSpec ivParameterSpec;
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if (bArr.length >= 28) {
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try {
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Class.forName("javax.crypto.spec.GCMParameterSpec");
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ivParameterSpec = new GCMParameterSpec(128, bArr, 0, 12);
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} catch (ClassNotFoundException unused) {
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if (zzqr.zza()) {
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ivParameterSpec = new IvParameterSpec(bArr, 0, 12);
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} else {
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throw new GeneralSecurityException("cannot use AES-GCM: javax.crypto.spec.GCMParameterSpec not found");
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}
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}
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ThreadLocal threadLocal = zza;
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((Cipher) threadLocal.get()).init(2, this.zzb, ivParameterSpec);
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return ((Cipher) threadLocal.get()).doFinal(bArr, 12, bArr.length - 12);
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}
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throw new GeneralSecurityException("ciphertext too short");
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}
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@Override // com.google.android.gms.internal.p002firebaseauthapi.zzap
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public final byte[] zzb(byte[] bArr, byte[] bArr2) throws GeneralSecurityException {
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throw null;
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}
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}
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