81 lines
2.9 KiB
Java
81 lines
2.9 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 java.util.Arrays;
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/* loaded from: classes2.dex */
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final class zzev implements zzau {
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private static final byte[] zza = new byte[0];
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private final zzey zzb;
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private final zzex zzc;
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private final zzet zzd;
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private final int zze;
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private final zzes zzf;
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/* JADX INFO: Access modifiers changed from: package-private */
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public static zzev zzb(zznk zznkVar) throws GeneralSecurityException {
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int i;
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zzey zzc;
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if (!zznkVar.zzk()) {
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throw new IllegalArgumentException("HpkePrivateKey is missing public_key field.");
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}
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if (!zznkVar.zze().zzl()) {
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throw new IllegalArgumentException("HpkePrivateKey.public_key is missing params field.");
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}
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if (zznkVar.zzf().zzs()) {
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throw new IllegalArgumentException("HpkePrivateKey.private_key is empty.");
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}
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zznh zzb = zznkVar.zze().zzb();
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zzex zzb2 = zzez.zzb(zzb);
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zzes zzc2 = zzez.zzc(zzb);
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zzet zza2 = zzez.zza(zzb);
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int zzf = zzb.zzf();
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int i2 = zzf - 2;
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if (i2 == 1) {
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i = 32;
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} else if (i2 == 2) {
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i = 65;
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} else if (i2 == 3) {
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i = 97;
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} else {
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if (i2 != 4) {
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throw new IllegalArgumentException("Unable to determine KEM-encoding length for ".concat(zznb.zza(zzf)));
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}
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i = 133;
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}
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int zzf2 = zznkVar.zze().zzb().zzf() - 2;
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if (zzf2 == 1) {
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zzc = zzfj.zzc(zznkVar.zzf().zzt());
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} else if (zzf2 == 2 || zzf2 == 3 || zzf2 == 4) {
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zzc = zzfh.zzc(zznkVar.zzf().zzt(), zznkVar.zze().zzg().zzt(), zzff.zzg(zznkVar.zze().zzb().zzf()));
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} else {
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throw new GeneralSecurityException("Unrecognized HPKE KEM identifier");
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}
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return new zzev(zzc, zzb2, zzc2, zza2, i, null);
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}
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@Override // com.google.android.gms.internal.p002firebaseauthapi.zzau
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public final byte[] zza(byte[] bArr, byte[] bArr2) throws GeneralSecurityException {
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int length = bArr.length;
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int i = this.zze;
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if (length < i) {
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throw new GeneralSecurityException("Ciphertext is too short.");
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}
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byte[] copyOf = Arrays.copyOf(bArr, i);
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byte[] copyOfRange = Arrays.copyOfRange(bArr, this.zze, length);
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zzey zzeyVar = this.zzb;
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zzex zzexVar = this.zzc;
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zzes zzesVar = this.zzf;
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zzet zzetVar = this.zzd;
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return zzeu.zzb(copyOf, zzexVar.zza(copyOf, zzeyVar), zzexVar, zzesVar, zzetVar, new byte[0]).zza(copyOfRange, zza);
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}
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private zzev(zzey zzeyVar, zzex zzexVar, zzes zzesVar, zzet zzetVar, int i, byte[] bArr) {
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this.zzb = zzeyVar;
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this.zzc = zzexVar;
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this.zzf = zzesVar;
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this.zzd = zzetVar;
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this.zze = i;
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}
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}
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