Add decompiled APK source code (JADX)

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

decompiled/sources/com/google/android/gms/internal/ads/zzgun.java

@@ -0,0 +1,46 @@
+package com.google.android.gms.internal.ads;
+
+import java.security.GeneralSecurityException;
+import java.security.spec.AlgorithmParameterSpec;
+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+
+/* loaded from: classes3.dex */
+public final class zzgun implements zzgdn {
+    private final SecretKey zza;
+    private final byte[] zzb;
+
+    private zzgun(byte[] bArr, zzgvo zzgvoVar) throws GeneralSecurityException {
+        if (!zzgks.zza(2)) {
+            throw new GeneralSecurityException("Can not use AES-GCM in FIPS-mode, as BoringCrypto module is not available.");
+        }
+        this.zza = zzgjd.zzc(bArr);
+        this.zzb = zzgvoVar.zzc();
+    }
+
+    public static zzgdn zzb(zzgfx zzgfxVar) throws GeneralSecurityException {
+        return new zzgun(zzgfxVar.zzd().zzd(zzgdw.zza()), zzgfxVar.zzc());
+    }
+
+    @Override // com.google.android.gms.internal.ads.zzgdn
+    public final byte[] zza(byte[] bArr, byte[] bArr2) throws GeneralSecurityException {
+        if (bArr == null) {
+            throw new NullPointerException("ciphertext is null");
+        }
+        byte[] bArr3 = this.zzb;
+        if (bArr.length < bArr3.length + 28) {
+            throw new GeneralSecurityException("ciphertext too short");
+        }
+        if (!zzgnu.zzc(bArr3, bArr)) {
+            throw new GeneralSecurityException("Decryption failed (OutputPrefix mismatch).");
+        }
+        AlgorithmParameterSpec zza = zzgjd.zza(bArr, this.zzb.length, 12);
+        SecretKey secretKey = this.zza;
+        Cipher zzb = zzgjd.zzb();
+        zzb.init(2, secretKey, zza);
+        if (bArr2 != null && bArr2.length != 0) {
+            zzb.updateAAD(bArr2);
+        }
+        return zzb.doFinal(bArr, this.zzb.length + 12, (r1 - r7) - 12);
+    }
+}