51 lines
1.9 KiB
Java
51 lines
1.9 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 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 zzpj implements zzqk {
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private static final ThreadLocal zza = new zzpi();
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private final SecretKeySpec zzb;
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private final int zzc;
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private final int zzd;
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public zzpj(byte[] bArr, int i) throws GeneralSecurityException {
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if (!zzdv.zza(2)) {
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throw new GeneralSecurityException("Can not use AES-CTR in FIPS-mode, as BoringCrypto module is not available.");
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}
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zzqs.zzb(bArr.length);
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this.zzb = new SecretKeySpec(bArr, "AES");
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int blockSize = ((Cipher) zza.get()).getBlockSize();
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this.zzd = blockSize;
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if (i < 12 || i > blockSize) {
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throw new GeneralSecurityException("invalid IV size");
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}
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this.zzc = i;
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}
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@Override // com.google.android.gms.internal.p002firebaseauthapi.zzqk
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public final byte[] zza(byte[] bArr) throws GeneralSecurityException {
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int length = bArr.length;
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int i = this.zzc;
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if (length >= i) {
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byte[] bArr2 = new byte[i];
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System.arraycopy(bArr, 0, bArr2, 0, i);
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int i2 = this.zzc;
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int i3 = length - i2;
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byte[] bArr3 = new byte[i3];
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Cipher cipher = (Cipher) zza.get();
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byte[] bArr4 = new byte[this.zzd];
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System.arraycopy(bArr2, 0, bArr4, 0, this.zzc);
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cipher.init(2, this.zzb, new IvParameterSpec(bArr4));
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if (cipher.doFinal(bArr, i2, i3, bArr3, 0) == i3) {
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return bArr3;
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}
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throw new GeneralSecurityException("stored output's length does not match input's length");
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}
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throw new GeneralSecurityException("ciphertext too short");
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}
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}
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