CrackMe.apk
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package com.google.android.gms.internal.p002firebaseauthapi;
import java.math.BigInteger;
import java.security.GeneralSecurityException;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.interfaces.ECPrivateKey;
import java.security.interfaces.ECPublicKey;
import java.security.spec.ECField;
import java.security.spec.ECFieldFp;
import java.security.spec.ECParameterSpec;
import java.security.spec.ECPoint;
import java.security.spec.ECPrivateKeySpec;
import java.security.spec.ECPublicKeySpec;
import java.security.spec.EllipticCurve;
import java.util.Arrays;
import javax.crypto.KeyAgreement;
/* renamed from: com.google.android.gms.internal.firebase-auth-api.zzpx reason: invalid package */
/* compiled from: com.google.firebase:firebase-auth@@21.1.0 */
public final class zzpx {
public static int zza(EllipticCurve ellipticCurve) throws GeneralSecurityException {
return (zzb(ellipticCurve).subtract(BigInteger.ONE).bitLength() + 7) / 8;
}
public static BigInteger zzb(EllipticCurve ellipticCurve) throws GeneralSecurityException {
ECField field = ellipticCurve.getField();
if (field instanceof ECFieldFp) {
return ((ECFieldFp) field).getP();
}
throw new GeneralSecurityException("Only curves over prime order fields are supported");
}
public static BigInteger zzc(BigInteger bigInteger, boolean z, EllipticCurve ellipticCurve) throws GeneralSecurityException {
BigInteger bigInteger2;
BigInteger zzb = zzb(ellipticCurve);
BigInteger mod = bigInteger.multiply(bigInteger).add(ellipticCurve.getA()).multiply(bigInteger).add(ellipticCurve.getB()).mod(zzb);
if (zzb.signum() == 1) {
BigInteger mod2 = mod.mod(zzb);
if (mod2.equals(BigInteger.ZERO)) {
bigInteger2 = BigInteger.ZERO;
} else {
BigInteger bigInteger3 = null;
if (!zzb.testBit(0) || !zzb.testBit(1)) {
if (zzb.testBit(0) && !zzb.testBit(1)) {
BigInteger bigInteger4 = BigInteger.ONE;
BigInteger shiftRight = zzb.subtract(BigInteger.ONE).shiftRight(1);
int i = 0;
while (true) {
BigInteger mod3 = bigInteger4.multiply(bigInteger4).subtract(mod2).mod(zzb);
if (mod3.equals(BigInteger.ZERO)) {
bigInteger2 = bigInteger4;
break;
}
BigInteger modPow = mod3.modPow(shiftRight, zzb);
if (modPow.add(BigInteger.ONE).equals(zzb)) {
BigInteger shiftRight2 = zzb.add(BigInteger.ONE).shiftRight(1);
BigInteger bigInteger5 = BigInteger.ONE;
BigInteger bigInteger6 = bigInteger4;
for (int bitLength = shiftRight2.bitLength() - 2; bitLength >= 0; bitLength--) {
BigInteger multiply = bigInteger6.multiply(bigInteger5);
BigInteger mod4 = bigInteger6.multiply(bigInteger6).add(bigInteger5.multiply(bigInteger5).mod(zzb).multiply(mod3)).mod(zzb);
BigInteger mod5 = multiply.add(multiply).mod(zzb);
if (shiftRight2.testBit(bitLength)) {
BigInteger mod6 = mod4.multiply(bigInteger4).add(mod5.multiply(mod3)).mod(zzb);
bigInteger5 = bigInteger4.multiply(mod5).add(mod4).mod(zzb);
bigInteger6 = mod6;
} else {
BigInteger bigInteger7 = mod5;
bigInteger6 = mod4;
bigInteger5 = bigInteger7;
}
}
bigInteger3 = bigInteger6;
} else if (modPow.equals(BigInteger.ONE)) {
bigInteger4 = bigInteger4.add(BigInteger.ONE);
i++;
if (i == 128 && !zzb.isProbablePrime(80)) {
throw new InvalidAlgorithmParameterException("p is not prime");
}
} else {
throw new InvalidAlgorithmParameterException("p is not prime");
}
}
}
} else {
bigInteger3 = mod2.modPow(zzb.add(BigInteger.ONE).shiftRight(2), zzb);
}
if (bigInteger3 == null || bigInteger3.multiply(bigInteger3).mod(zzb).compareTo(mod2) == 0) {
bigInteger2 = bigInteger3;
} else {
throw new GeneralSecurityException("Could not find a modular square root");
}
}
return z != bigInteger2.testBit(0) ? zzb.subtract(bigInteger2).mod(zzb) : bigInteger2;
}
throw new InvalidAlgorithmParameterException("p must be positive");
}
public static KeyPair zzd(ECParameterSpec eCParameterSpec) throws GeneralSecurityException {
KeyPairGenerator keyPairGenerator = (KeyPairGenerator) zzpz.zzf.zza("EC");
keyPairGenerator.initialize(eCParameterSpec);
return keyPairGenerator.generateKeyPair();
}
static void zze(ECPoint eCPoint, EllipticCurve ellipticCurve) throws GeneralSecurityException {
BigInteger zzb = zzb(ellipticCurve);
BigInteger affineX = eCPoint.getAffineX();
BigInteger affineY = eCPoint.getAffineY();
if (affineX == null || affineY == null) {
throw new GeneralSecurityException("point is at infinity");
} else if (affineX.signum() == -1 || affineX.compareTo(zzb) >= 0) {
throw new GeneralSecurityException("x is out of range");
} else if (affineY.signum() == -1 || affineY.compareTo(zzb) >= 0) {
throw new GeneralSecurityException("y is out of range");
} else if (!affineY.multiply(affineY).mod(zzb).equals(affineX.multiply(affineX).add(ellipticCurve.getA()).multiply(affineX).add(ellipticCurve.getB()).mod(zzb))) {
throw new GeneralSecurityException("Point is not on curve");
}
}
public static void zzf(ECPublicKey eCPublicKey, ECPrivateKey eCPrivateKey) throws GeneralSecurityException {
zzg(eCPublicKey, eCPrivateKey);
zze(eCPublicKey.getW(), eCPrivateKey.getParams().getCurve());
}
static void zzg(ECPublicKey eCPublicKey, ECPrivateKey eCPrivateKey) throws GeneralSecurityException {
try {
ECParameterSpec params = eCPublicKey.getParams();
ECParameterSpec params2 = eCPrivateKey.getParams();
if (!params.getCurve().equals(params2.getCurve()) || !params.getGenerator().equals(params2.getGenerator()) || !params.getOrder().equals(params2.getOrder()) || params.getCofactor() != params2.getCofactor()) {
throw new GeneralSecurityException("invalid public key spec");
}
} catch (IllegalArgumentException | NullPointerException e) {
throw new GeneralSecurityException(e);
}
}
public static byte[] zzh(ECPrivateKey eCPrivateKey, ECPublicKey eCPublicKey) throws GeneralSecurityException {
zzg(eCPublicKey, eCPrivateKey);
ECPoint w = eCPublicKey.getW();
zze(w, eCPrivateKey.getParams().getCurve());
PublicKey generatePublic = ((KeyFactory) zzpz.zzg.zza("EC")).generatePublic(new ECPublicKeySpec(w, eCPrivateKey.getParams()));
KeyAgreement keyAgreement = (KeyAgreement) zzpz.zze.zza("ECDH");
keyAgreement.init(eCPrivateKey);
try {
keyAgreement.doPhase(generatePublic, true);
byte[] generateSecret = keyAgreement.generateSecret();
EllipticCurve curve = eCPrivateKey.getParams().getCurve();
BigInteger bigInteger = new BigInteger(1, generateSecret);
if (bigInteger.signum() == -1 || bigInteger.compareTo(zzb(curve)) >= 0) {
throw new GeneralSecurityException("shared secret is out of range");
}
zzc(bigInteger, true, curve);
return generateSecret;
} catch (IllegalStateException e) {
throw new GeneralSecurityException(e);
}
}
public static ECPrivateKey zzi(int i, byte[] bArr) throws GeneralSecurityException {
return (ECPrivateKey) ((KeyFactory) zzpz.zzg.zza("EC")).generatePrivate(new ECPrivateKeySpec(new BigInteger(1, bArr), zzl(i)));
}
public static ECPublicKey zzj(int i, byte[] bArr, byte[] bArr2) throws GeneralSecurityException {
ECParameterSpec zzl = zzl(i);
ECPoint eCPoint = new ECPoint(new BigInteger(1, bArr), new BigInteger(1, bArr2));
zze(eCPoint, zzl.getCurve());
return (ECPublicKey) ((KeyFactory) zzpz.zzg.zza("EC")).generatePublic(new ECPublicKeySpec(eCPoint, zzl));
}
public static ECPublicKey zzk(ECParameterSpec eCParameterSpec, int i, byte[] bArr) throws GeneralSecurityException {
ECPoint eCPoint;
EllipticCurve curve = eCParameterSpec.getCurve();
int zza = zza(curve);
int i2 = i - 1;
boolean z = false;
if (i2 == 0) {
int length = bArr.length;
if (length != zza + zza + 1) {
throw new GeneralSecurityException("invalid point size");
} else if (bArr[0] == 4) {
int i3 = zza + 1;
eCPoint = new ECPoint(new BigInteger(1, Arrays.copyOfRange(bArr, 1, i3)), new BigInteger(1, Arrays.copyOfRange(bArr, i3, length)));
zze(eCPoint, curve);
} else {
throw new GeneralSecurityException("invalid point format");
}
} else if (i2 != 2) {
BigInteger zzb = zzb(curve);
int length2 = bArr.length;
if (length2 == zza + 1) {
byte b = bArr[0];
if (b != 2) {
if (b == 3) {
z = true;
} else {
throw new GeneralSecurityException("invalid format");
}
}
BigInteger bigInteger = new BigInteger(1, Arrays.copyOfRange(bArr, 1, length2));
if (bigInteger.signum() == -1 || bigInteger.compareTo(zzb) >= 0) {
throw new GeneralSecurityException("x is out of range");
}
eCPoint = new ECPoint(bigInteger, zzc(bigInteger, z, curve));
} else {
throw new GeneralSecurityException("compressed point has wrong length");
}
} else {
int length3 = bArr.length;
if (length3 == zza + zza) {
eCPoint = new ECPoint(new BigInteger(1, Arrays.copyOfRange(bArr, 0, zza)), new BigInteger(1, Arrays.copyOfRange(bArr, zza, length3)));
zze(eCPoint, curve);
} else {
throw new GeneralSecurityException("invalid point size");
}
}
return (ECPublicKey) ((KeyFactory) zzpz.zzg.zza("EC")).generatePublic(new ECPublicKeySpec(eCPoint, eCParameterSpec));
}
public static byte[] zzm(int i, int i2, ECPoint eCPoint) throws GeneralSecurityException {
EllipticCurve curve = zzl(i).getCurve();
zze(eCPoint, curve);
int zza = zza(curve);
int i3 = zza + zza + 1;
byte[] bArr = new byte[i3];
byte[] byteArray = eCPoint.getAffineX().toByteArray();
byte[] byteArray2 = eCPoint.getAffineY().toByteArray();
int length = byteArray2.length;
System.arraycopy(byteArray2, 0, bArr, i3 - length, length);
int length2 = byteArray.length;
System.arraycopy(byteArray, 0, bArr, (zza + 1) - length2, length2);
bArr[0] = 4;
return bArr;
}
private static ECParameterSpec zzn(String str, String str2, String str3, String str4, String str5) {
BigInteger bigInteger = new BigInteger(str);
return new ECParameterSpec(new EllipticCurve(new ECFieldFp(bigInteger), bigInteger.subtract(new BigInteger("3")), new BigInteger(str3, 16)), new ECPoint(new BigInteger(str4, 16), new BigInteger(str5, 16)), new BigInteger(str2), 1);
}
public static ECParameterSpec zzl(int i) throws NoSuchAlgorithmException {
int i2 = i - 1;
if (i2 == 0) {
return zzn("115792089210356248762697446949407573530086143415290314195533631308867097853951", "115792089210356248762697446949407573529996955224135760342422259061068512044369", "5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b", "6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296", "4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5");
}
if (i2 != 1) {
return zzn("6864797660130609714981900799081393217269435300143305409394463459185543183397656052122559640661454554977296311391480858037121987999716643812574028291115057151", "6864797660130609714981900799081393217269435300143305409394463459185543183397655394245057746333217197532963996371363321113864768612440380340372808892707005449", "051953eb9618e1c9a1f929a21a0b68540eea2da725b99b315f3b8b489918ef109e156193951ec7e937b1652c0bd3bb1bf073573df883d2c34f1ef451fd46b503f00", "c6858e06b70404e9cd9e3ecb662395b4429c648139053fb521f828af606b4d3dbaa14b5e77efe75928fe1dc127a2ffa8de3348b3c1856a429bf97e7e31c2e5bd66", "11839296a789a3bc0045c8a5fb42c7d1bd998f54449579b446817afbd17273e662c97ee72995ef42640c550b9013fad0761353c7086a272c24088be94769fd16650");
}
return zzn("39402006196394479212279040100143613805079739270465446667948293404245721771496870329047266088258938001861606973112319", "39402006196394479212279040100143613805079739270465446667946905279627659399113263569398956308152294913554433653942643", "b3312fa7e23ee7e4988e056be3f82d19181d9c6efe8141120314088f5013875ac656398d8a2ed19d2a85c8edd3ec2aef", "aa87ca22be8b05378eb1c71ef320ad746e1d3b628ba79b9859f741e082542a385502f25dbf55296c3a545e3872760ab7", "3617de4a96262c6f5d9e98bf9292dc29f8f41dbd289a147ce9da3113b5f0b8c00a60b1ce1d7e819d7a431d7c90ea0e5f");
}
}
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